* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Thinking Bar Panel - Claude AI Scratchpad Style */
.thinking-bar-panel {
  margin: 0 0 var(--spacing-md) 0;
  width: 100%;
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
  overflow: hidden;
  min-height: var(--touch-target);
  max-height: var(--touch-target);
}

.thinking-bar-panel.expanded {
  max-height: 450px;
}

.thinking-bar-panel:hover {
  border-color: var(--border-hover);
}

.thinking-bar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 0 var(--ui-padding);
  cursor: pointer;
  user-select: none;
  transition: background 0.2s ease;
  min-height: var(--touch-target);
  max-height: var(--touch-target);
  box-sizing: border-box;
}

.thinking-bar-header:hover {
  background: var(--bg-tertiary);
}

.thinking-bar-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin: 0;
  padding: 0;
  color: var(--text-tertiary);
  font-size: 16px;
  animation: thinking-pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes thinking-pulse {
  0%,
  100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

.thinking-bar-title {
  flex: 1;
  margin: 0;
  padding: 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-tertiary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  line-height: 1.4;
}

.thinking-bar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  margin: 0;
  padding: 0;
  color: var(--text-tertiary);
  font-size: 16px;
  transition: transform 0.2s ease;
  flex-shrink: 0;
}

.thinking-bar-content {
  max-height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.thinking-bar-content.expanded {
  max-height: 400px;
  border-top: 1px solid var(--border-color);
  padding: var(--ui-padding);
}

.thinking-stream {
  margin: 0;
  padding: 0;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-secondary);
  max-height: 370px;
  overflow-y: auto;
}

.thinking-stream::-webkit-scrollbar {
  width: 6px;
}

.thinking-stream::-webkit-scrollbar-track {
  background: transparent;
}

.thinking-stream::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 3px;
}

.thinking-stream::-webkit-scrollbar-thumb:hover {
  background: var(--border-hover);
}

.thinking-step {
  margin-bottom: 12px;
}

.thinking-step:last-child {
  margin-bottom: 0;
}

.thinking-step-header {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.thinking-step-description {
  color: var(--text-secondary);
  line-height: 1.5;
}

/* Dark theme adjustments */
[data-theme="dark"] .thinking-bar-panel {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .thinking-bar-panel:hover {
  border-color: var(--border-hover);
  border-color: rgba(99, 102, 241, 0.4);
}

[data-theme="dark"] .thinking-stream {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #b8b8b8;
}

[data-theme="dark"] .thinking-item {
  background: rgba(99, 102, 241, 0.2);
  border-left-color: rgba(99, 102, 241, 0.7);
  color: #d0d0d0;
}

[data-theme="dark"] .thinking-item:hover {
  background: rgba(99, 102, 241, 0.25);
  border-left-color: rgba(99, 102, 241, 0.9);
}
/* Global font-size constraints: all 16px */
html {
  font-size: 16px;
}

/* Ensure all text elements use 16px font size */
p,
span,
a,
button,
input,
textarea,
select,
label,
li,
td,
th,
div {
  font-size: 16px;
}

/* Headings - all 16px */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-size: 16px;
}

/* Universal text truncation for UI elements that need single-line ellipsis */
/* Apply to any element with .text-truncate class or common UI patterns */
.text-truncate,
.sidebar h1,
.sidebar h2,
.sidebar h3,
.sidebar h4,
.sidebar h5,
.sidebar h6,
.navbar h1,
.navbar h2,
.navbar h3,
.navbar h4,
.navbar h5,
.navbar h6,
.settings-panel h1,
.settings-panel h2,
.settings-panel h3,
.settings-panel h4,
.settings-panel h5,
.settings-panel h6,
.menu-item,
button:not(.copy-code-button):not(.action-button):not(.message-menu-toggle)
  span,
[class*="-label"]:not(.code-block-filename),
[class*="-title"]:not(.message-text *),
[class*="-header"] > *:not(button):not(i):not(.action-button),
[class*="-name"]:not(.message-text *) {
  text-overflow: ellipsis;
  white-space: nowrap;
}

:root {
  /* ============================================
     LIGHT THEME - Warm Neutral Palette
     Clean, professional, easy on the eyes
     ============================================ */

  /* Background hierarchy (lightest to darkest for depth) */
  --bg-primary: #e9e9e9; /* Light grey - main canvas */
  --bg-secondary: #ffffff; /* White - cards, panels */
  --bg-tertiary: #f3f4f6; /* Light grey - elevated surfaces */
  --bg-hover: #e5e7eb; /* Hover state */
  --bg-active: #d1d5db; /* Active/pressed state */

  /* Specialized backgrounds */
  --bg-form: #ffffff; /* Form containers - white */
  --bg-input: #f5f5f5; /* Input fields - light grey 245,245,245 */
  --bg-chat-content: #e9e9e9; /* Chat area backdrop - grey */
  --bg-welcome: #ffffff; /* Welcome box - white */
  --bg-code: #1f2937; /* Code blocks - dark for contrast */
  --bg-header: #1f1f1f; /* Code header background - Gemini style */

  /* Text hierarchy (darkest to lightest) */
  --text-primary: #111827; /* Near-black - main text */
  --text-secondary: #4b5563; /* Dark grey - secondary text */
  --text-tertiary: #9ca3af; /* Medium grey - muted text */
  --text-disabled: #d1d5db; /* Disabled text */
  --text-on-accent: #ffffff; /* Text on accent backgrounds */
  --text-on-dark: #f9fafb; /* Text on dark backgrounds */
  --text-code: #e5e7eb; /* Code text - light grey for dark code blocks */

  /* Border colors */
  --border-color: #d1d5db; /* Standard border - more visible */
  --border-light: #f3f4f6; /* Subtle border */
  --border-dark: #d1d5db; /* Emphasized border */
  --border-focus: #0f69fa; /* Focus ring color - blue */

  /* Accent colors - Blue primary */
  --accent-color: #0f69fa; /* Primary accent - blue */
  --accent-hover: #0d5cd9; /* Accent hover - darker blue */
  --accent-light: #e6f0ff; /* Accent background tint */
  --accent-muted: #93c5fd; /* Muted accent */

  /* Semantic colors */
  --success-color: #10b981; /* Green - success */
  --success-light: #d1fae5; /* Success background */
  --warning-color: #f59e0b; /* Amber - warning */
  --warning-light: #fef3c7; /* Warning background */
  --danger-color: #ef4444; /* Red - error/danger */
  --danger-light: #fee2e2; /* Danger background */
  --info-color: #3b82f6; /* Blue - info */
  --info-light: #dbeafe; /* Info background */

  /* Message bubbles */
  --message-user-bg: #0f69fa; /* Blue user message */
  --message-user-text: #ffffff; /* White text on user message */
  --message-assistant-bg: #ffffff; /* White assistant message */
  --message-assistant-text: #111827; /* Dark text on assistant message */

  /* Consistent 8px-based spacing system - 8px baseline grid */
  --spacing-2xs: 2px; /* 1 * base - 8px baseline grid */
  --spacing-xs: 4px; /* 1 * base - 8px baseline grid */
  --spacing-sm: 8px; /* 2 * base - 8px baseline grid */
  --spacing-md: 16px; /* 2 * base - 8px baseline grid */
  --spacing-lg: 24px; /* 3 * base - 8px baseline grid */
  --spacing-xl: 32px; /* 4 * base - 8px baseline grid */
  --spacing-2xl: 40px; /* 6 * base - 8px baseline grid */
  --spacing-3xl: 48px; /* 8 * base - 8px baseline grid */
  --baseline-grid: 8px; /* 8px baseline grid unit */

  /* Touch targets and interactive elements - 48px minimum system */
  --touch-target-sm: 48px; /* Small touch target - 48px minimum */
  --touch-target: 48px; /* Standard touch target - 48px minimum */
  --touch-target-lg: 56px; /* Large touch target */
  --touch-target-circle: 48px; /* Perfect circle touch target - 48px minimum */
  /* Consistent container width for perfect alignment */
  --container-max-width: 748px; /* Matches welcome-message width */
  --form-padding: 16px; /* Aligned with 8px baseline grid (3 * 8px) */
  --element-spacing: 16px; /* Uniform spacing between elements */
  --element-spacing-x1: 4px; /* Uniform spacing between elements */
  --element-spacing-x2: 8px; /* Uniform spacing between elements */
  --element-spacing-x2: 16px; /* Uniform spacing between elements */
  /* UI padding standardization */
  --ui-padding: 16px; /* Symmetric padding for UI elements */
  --button-px: 16px; /* Button horizontal padding baseline */
  --button-py: 16px; /* Button vertical padding baseline */
  --button-radius: 16px; /* Standard button corner radius */
  /* Layout dimensions */
  --navbar-height: 64px; /* Standard header height */
  --sidebar-width: 320px; /* Fixed sidebar width */
  --welcome-message-width: var(
    --container-max-width
  ); /* Matches container max-width for consistency */

  /* Border radius system - perfect circles and pill-shaped design */
  --radius-xs: 5px; /* Extra small pill radius */
  --radius-sm: 10px; /* Small pill radius */
  --radius-md: 15px; /* Medium pill radius */
  --radius-lg: 20px; /* Large pill radius */
  --radius-xl: 25px; /* Extra large pill radius */
  --radius-pill: 30px; /* Pill-shaped (highly rounded) */
  --radius-circle: 35px; /* Perfect circle for square elements */
  --radius-perfect-circle: 50%; /* Perfect circle for all buttons and interactive elements */

  /* Typography */
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica,
    Arial, sans-serif;
  --font-mono:
    "Roboto Mono", "SF Mono", "Monaco", "Menlo", "Consolas", "Liberation Mono",
    monospace;

  /* Animation and transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Copy button feedback states */
  --copy-success-bg: var(--success-color);
  --copy-success-text: #ffffff;
  --copy-default-bg: var(--bg-tertiary);
  --copy-default-text: var(--text-secondary);

  /* Shadows for depth */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* ============================================
   DARK THEME - Rich Dark Palette
   Comfortable for extended use, proper contrast
   ============================================ */
[data-theme="dark"] {
  /* Background hierarchy (darkest to lightest for depth) */
  --bg-primary: rgba(22, 22, 22, 1); /* Very dark grey - main canvas */
  --bg-secondary: #171717; /* Very dark grey - cards, panels */
  --bg-tertiary: #262626; /* Dark grey - elevated surfaces */
  --bg-hover: #333333; /* Hover state */
  --bg-active: #404040; /* Active/pressed state */

  /* Specialized backgrounds */
  --bg-form: #1a1a1a; /* Form containers */
  --bg-input: #262626; /* Input fields - slightly elevated */
  --bg-chat-content: #0a0a0a; /* Chat area backdrop - deepest black */
  --bg-welcome: #171717; /* Welcome box */
  --bg-code: #1e1e1e; /* Code blocks */
  --bg-header: #1f1f1f; /* Code header background - Gemini style */

  /* Text hierarchy (lightest to darkest) */
  --text-primary: #fafafa; /* Near-white - main text */
  --text-secondary: #a3a3a3; /* Light grey - secondary text */
  --text-tertiary: #737373; /* Medium grey - muted text */
  --text-disabled: #525252; /* Disabled text */
  --text-on-accent: #ffffff; /* Text on accent backgrounds */
  --text-on-dark: #fafafa; /* Text on dark backgrounds */
  --text-code: #f3f4f6; /* Code text - very light grey for dark code blocks */

  /* Border colors */
  --border-color: #4a4a4a; /* Standard border - more visible */
  --border-light: #3a3a3a; /* Subtle border */
  --border-dark: #5a5a5a; /* Emphasized border */
  --border-focus: #3b8bff; /* Focus ring - lighter blue for visibility */

  /* Accent colors - Lighter blue for dark mode visibility */
  --accent-color: #3b8bff; /* Primary accent - lighter blue */
  --accent-hover: #5fa0ff; /* Accent hover - even lighter */
  --accent-light: #1a365d; /* Accent background tint - dark blue */
  --accent-muted: #2563eb; /* Muted accent */

  /* Semantic colors - adjusted for dark mode */
  --success-color: #34d399; /* Lighter green */
  --success-light: #064e3b; /* Dark green background */
  --warning-color: #fbbf24; /* Lighter amber */
  --warning-light: #78350f; /* Dark amber background */
  --danger-color: #f87171; /* Lighter red */
  --danger-light: #7f1d1d; /* Dark red background */
  --info-color: #60a5fa; /* Lighter blue */
  --info-light: #1e3a5f; /* Dark blue background */

  /* Message bubbles */
  --message-user-bg: #2d7afc; /* Blue user message - visible in dark */
  --message-user-text: #ffffff; /* White text on user message */
  --message-assistant-bg: #1f1f1f; /* Dark grey assistant message */
  --message-assistant-text: #fafafa; /* Light text on assistant message */

  /* Copy button feedback states for dark theme */
  --copy-success-bg: var(--success-color);
  --copy-success-text: #000000;
  --copy-default-bg: var(--bg-tertiary);
  --copy-default-text: var(--text-secondary);

  /* Shadows for dark mode - subtle glow effect */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

html {
  overflow-x: hidden;
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  height: 100vh;
  /* overflow-x: hidden; */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
  margin: 0;
  padding: 0;
  font-size: 16px;
}

canvas {
  border-radius: 50%;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

canvas:hover {
  cursor: pointer;
}

/* Top Navigation Bar - Fixed at Top */
.top-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background-color: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm);
  z-index: 1000;
  transition: background-color var(--transition-normal);
  border-bottom: 1px solid var(--border-color);
}

.navbar-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  min-width: 0;
  flex: 1;
}

.navbar-logo {
  flex-shrink: 0;
  height: 48px;
  width: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  object-fit: contain;
  background-color: var(--bg-tertiary);
  border-radius: 50%;
  padding: 4px;
  box-sizing: border-box;
}

.navbar-title {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}

.navbar-center {
  display: flex;
  align-items: center;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.model-info {
  display: flex;
  align-items: center;
}

.model-badge {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0;
  font-weight: 500;
  color: var(--text-primary);
  transition: none;
}

.status-dot {
  display: none;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.navbar-right {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  min-width: 0;
  flex: 1;
  justify-content: flex-end;
}

.navbar-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: var(--touch-target);
  background-color: var(--bg-secondary);
  border: none;
  color: var(--text-primary);
  text-decoration: none;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 500;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.navbar-link:hover {
  background-color: var(--bg-hover);
  transform: none;
}

/* Theme Toggle - 48px fixed size */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
}

.theme-toggle i {
  font-size: 16px;
  color: var(--accent-color);
}

/* Sidebar Toggle Button */
.sidebar-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.sidebar-toggle-btn:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
}

.sidebar-toggle-btn i {
  font-size: 16px;
}

/* Settings Toggle Button - styled like sidebar-toggle-btn */
.settings-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: var(--bg-tertiary);
  border: none;
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.settings-toggle-btn:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
}

.settings-toggle-btn i {
  font-size: 16px;
}

.container {
  display: flex;
  height: 100vh;
  padding-top: 64px; /* Fixed navbar height */
  position: relative;
  overflow: hidden;
  width: 100%;
  max-width: 100%;
  margin: 0;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;
}

/* Sidebar */
.sidebar {
  position: fixed;
  left: calc(-1 * var(--sidebar-width));
  top: 0;
  bottom: 0;
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  max-width: var(--sidebar-width);
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1100;
  transition: left var(--transition-slow);
}

.sidebar.visible {
  left: 0;
}

.sidebar-header {
  height: var(--navbar-height);
  padding: 0 var(--spacing-sm);
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
  min-width: 0;
  background-color: var(--bg-tertiary);
  border-bottom: none;

  margin: 0; /* Ensure clean edges with no extra margins */
  flex-shrink: 0;
}

.sidebar-title {
  flex: 1;
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
}

.sidebar-close-btn {
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.sidebar-close-btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: none;
}

.sidebar-close-btn i {
  font-size: 16px;
}

.sidebar-new-chat-btn-container {
  padding: var(--spacing-sm) var(--spacing-sm);
  border-bottom: 1px solid var(--border-color);
  order: 2; /* Position after search-box */
  min-height: 64px;
  max-height: 64px;
  height: 64px;
  box-sizing: border-box;
}

.sidebar-new-chat-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  width: 100%;
  height: var(--touch-target);
  min-height: var(--touch-target);
  background-color: var(--accent-color);
  color: var(--text-on-accent);
  border: none;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color var(--transition-normal);
  padding: var(--spacing-sm);
}

/* Sidebar search toggle button (header right) */
.sidebar-search-toggle-btn {
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    border-color var(--transition-normal);
  margin-left: auto;
}

.sidebar-search-toggle-btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: none;
}

/* Sidebar search toggle active/toggled state */
.sidebar-search-toggle-btn.active {
  background-color: var(--accent-color);
  color: var(--text-on-accent);
}

.sidebar-search-toggle-btn.active:hover {
  background-color: var(--accent-hover);
  color: var(--text-on-accent);
}

.sidebar-search-toggle-btn i {
  font-size: 16px;
}

/* Hide new chat button when search is visible */
.search-box.visible ~ .sidebar-new-chat-btn-container {
  display: none;
}

.search-box {
  padding: var(--spacing-sm) var(--spacing-sm);
  position: relative;
  display: none; /* Hidden by default, toggleable */
  order: 1; /* Position before new-chat button */
  margin-bottom: 0;
}

.search-box.visible {
  display: block;
}

.search-icon {
  position: absolute;
  left: calc(var(--spacing-sm) + var(--spacing-md));
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-tertiary);
  font-size: 16px;
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  line-height: normal;
}

.search-box input {
  width: 100%;
  padding: 0 calc(var(--touch-target)) 0 calc(var(--touch-target));
  height: var(--touch-target);
  min-height: var(--touch-target);
  background: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-size: 16px;
  font-family: var(--font-sans);
  line-height: normal;
  transition: all var(--transition-normal);
  box-sizing: border-box;
  vertical-align: middle;
  text-align: left;
}

.search-box input::placeholder {
  color: var(--text-tertiary);
  text-align: left;
}

.search-box input:focus {
  background-color: var(--bg-primary);
  border-color: var(--border-color);
}

.search-clear-btn {
  position: absolute;
  right: calc(var(--spacing-sm) + var(--spacing-2xs));
  top: 50%;
  transform: translateY(-50%);
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: none;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-tertiary); /* Enhanced contrast */
  color: var(--text-secondary);
  border: none;

  border-radius: var(--radius-circle); /* Pill-shaped design */
  cursor: pointer;
  font-size: 16px;
  transition: all var(--transition-normal);
}

.search-clear-btn:hover {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-50%);
}

.search-clear-btn.visible {
  display: flex;
}

.conversations-list {
  flex: 1 1 auto;
  overflow-y: auto;
  padding: var(--spacing-sm);
  order: 3; /* Position after search-box */
  min-height: 0;
  margin-bottom: 0;
}

.conversation-item {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  /* padding: var(--spacing-sm); */
  /* padding: 0 var(--spacing-md); */
  min-height: var(--touch-target);
  max-height: var(--touch-target);
  height: var(--touch-target);
  /* margin-bottom: var(--spacing-2xs); */
  background: transparent;
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.conversation-item:hover {
  background-color: var(--bg-hover);
  border: none;
  transform: none;
}

.conversation-item.active {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid var(--text-primary);
  border-radius: var(--radius-pill);
  transform: none;
}

.conversation-item-content {
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  height: 100%;
  /* gap: var(--spacing-sm); */
}

.conversation-item-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  /* color: var(--text-tertiary); */
  flex-shrink: 0;
  font-size: 16px;
}

.conversation-title {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
  margin-bottom: 0;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: normal;
}

.conversation-date {
  display: none;
}

.conversation-item.active .conversation-title {
  color: var(--text-primary);
  font-weight: bold;
}
.conversation-item.active .conversation-item-icon {
  color: var(--text-primary);
}
.conversation-item.active .conversation-menu-btn {
  color: var(--text-primary);
}

.conversation-delete-btn {
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-tertiary);
  border: none;

  border-radius: var(--radius-circle);
  cursor: pointer;
  transition: all var(--transition-normal);
  flex-shrink: 0;
}

.conversation-delete-btn:hover {
  background-color: var(--bg-hover);
  color: var(--danger-color);
  transform: none;
}

.conversation-item.active .conversation-delete-btn {
  color: var(--text-tertiary);
}

.conversation-item.active .conversation-delete-btn:hover {
  color: var(--danger-color);
  background-color: var(--bg-hover);
}

.sidebar-footer {
  display: none; /* Hidden - admin panel removed */
  padding: 0;
  border-top: none;

  margin-top: 0;
  height: 0;
}

.admin-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: var(--touch-target);
  background-color: transparent;
  color: var(--text-secondary);
  text-decoration: none;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 500;
  transition: all var(--transition-normal);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.admin-link:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
  border-color: var(--border-color);
  text-decoration: none;
  /* Prevent movement and remove shadow */
  transform: none;
}

/* Main Chat */
.main-chat {
  flex: 1;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  overflow: hidden;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  padding-bottom: 0; /* Input area is fixed, no bottom padding needed */
}

.chat-header {
  position: relative;
  height: var(--touch-target);
  min-height: var(--touch-target);
  max-height: var(--touch-target);
  padding: var(--spacing-sm);
  background: linear-gradient(
    to bottom,
    var(--bg-primary) 0%,
    var(--bg-primary) 60%,
    rgba(255, 255, 255, 0) 100%
  );
  border-bottom: none;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.chat-header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-max-width);
  min-height: var(--touch-target);
  gap: var(--spacing-md);
  box-sizing: border-box;
}

.chat-header-left {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-shrink: 0;
}

/* New Chat Header Button - positioned outside left of header container */
.new-chat-header-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  max-width: var(--touch-target);
  max-height: var(--touch-target);
  margin: 0;
  padding: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.new-chat-header-btn:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.new-chat-header-btn i {
  font-size: var(--spacing-md);
  margin: 0;
  padding: 0;
}

/* Comment button in chat header - hidden by default, only one icon shown at a time */
.comment-header-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  max-width: var(--touch-target);
  max-height: var(--touch-target);
  margin: 0;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.comment-header-btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.comment-header-btn i {
  font-size: var(--spacing-md);
  margin: 0;
  padding: 0;
}

.chat-header-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  min-width: 0;
  margin: 0;
  padding: 0;
}

.chat-header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  min-width: var(--touch-target);
  margin: 0;
  padding: 0;
  position: relative;
}

/* Chat Menu Button (3-dot menu) */
.chat-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  max-width: var(--touch-target);
  max-height: var(--touch-target);
  margin: 0;
  padding: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
  color: var(--text-secondary);
}

.chat-menu-btn:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* Chat Menu Popup */
.chat-menu-popup {
  position: absolute;
  top: calc(100% + var(--spacing-xs));
  right: 0;
  background-color: var(--bg-primary);
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  z-index: 10000;
  min-width: 160px;
  overflow: hidden;
  animation: menuFadeIn 0.2s ease-out;
  pointer-events: auto;
  opacity: 1;
  visibility: visible;
  /* Ensure popup is above all other elements */
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.chat-menu-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.chat-menu-item:hover {
  background-color: var(--bg-hover);
}

.chat-menu-item i {
  font-size: 16px;
  width: 16px;
  text-align: center;
  color: var(--text-secondary);
}

.chat-menu-item:hover i {
  color: var(--accent-color);
}

.chat-menu-item-danger {
  color: var(--error-color);
}

.chat-menu-item-danger:hover {
  background-color: rgba(239, 68, 68, 0.1);
}

.chat-menu-item-danger i {
  color: var(--error-color);
}

/* Custom Confirmation Dialog */
.confirm-dialog-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.2s ease,
    visibility 0.2s ease;
}

.confirm-dialog-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.confirm-dialog {
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  min-width: 320px;
  max-width: 400px;
  transform: scale(0.9);
  transition: transform 0.2s ease;
}

.confirm-dialog-overlay.visible .confirm-dialog {
  transform: scale(1);
}

.confirm-dialog-title {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.confirm-dialog-message {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 24px;
  line-height: normal;
}

.confirm-dialog-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.confirm-dialog-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  min-width: 48px;
  padding: 0 24px;
  border: none;
  border-radius: 24px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.confirm-dialog-btn.cancel {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

.confirm-dialog-btn.cancel:hover {
  background-color: var(--bg-hover);
}

.confirm-dialog-btn.confirm {
  background-color: var(--danger-color);
  color: white;
}

/* Continue Response Container */
.continue-response-container {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px;
  margin: 8px 0;
  border-radius: 12px;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

.continue-response-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: 24px;
  background-color: var(--primary-color);
  color: white;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px rgba(95, 187, 253, 0.2);
}

.continue-response-button:hover {
  background-color: var(--primary-hover);
  box-shadow: 0 4px 12px rgba(95, 187, 253, 0.3);
  transform: translateY(-1px);
}

.continue-response-button:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(95, 187, 253, 0.2);
}

.continue-response-button i {
  font-size: 16px;
}

.continue-response-button span {
  font-size: 16px;
}

.confirm-dialog-btn.confirm:hover {
  background-color: var(--danger-color);
  filter: brightness(0.9);
}

/* Message Menu Popup - More options for each message */
.message-menu-popup {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  z-index: 10000; /* Higher z-index to ensure visibility above all elements */
  min-width: 180px;
  overflow: visible;
  animation: menuFadeIn 0.15s ease-out;
  pointer-events: auto; /* Ensure menu is clickable */
  opacity: 1; /* Ensure full opacity */
  visibility: visible; /* Ensure visibility */
  display: block; /* Ensure display */
}

@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-menu-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 12px 16px;
  background: transparent;
  border: none;
  cursor: pointer;
  font-size: 16px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  text-align: left;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.message-menu-item:hover {
  background-color: var(--bg-hover);
}

.message-menu-item i {
  font-size: 16px;
  width: 16px;
  text-align: center;
  color: var(--text-secondary);
}

.message-menu-item:hover i {
  color: var(--accent-color);
}

.message-menu-item-danger {
  color: var(--danger-color);
}

.message-menu-item-danger:hover {
  background-color: var(--danger-light);
}

.message-menu-item-danger i {
  color: var(--danger-color);
}

/* More button for message actions */
.more-button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: visible; /* Override action-button overflow:hidden to allow popup menu */
  z-index: 1; /* Ensure button is above other elements */
  isolation: isolate; /* Create new stacking context */
}

.more-button:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* More button inside user message */
.message.user .more-button {
  background-color: transparent;
  color: var(--text-on-accent);
  border-color: rgba(255, 255, 255, 0.3);
}

.message.user .more-button:hover {
  background-color: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
}

.sidebar-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--touch-target);
  height: var(--touch-target);
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.sidebar-toggle-btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--border-color);
}

.sidebar-toggle-btn i {
  font-size: 16px;
}

.chat-header-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: var(--spacing-sm);
  gap: 8px;
}

.chat-header-right {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
}

.chat-title {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  text-shadow: 0 0 1px rgba(0, 0, 0, 0.1);
}

.chat-title i {
  color: var(--accent-color);
}

.chat-controls {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

/* Chat Content Wrapper - Split Screen */
.chat-content-wrapper {
  flex: 1;
  display: flex;
  overflow: hidden;
  position: relative;
  background-color: transparent;
  transition:
    outline 0.2s ease,
    background-color 0.2s ease;
}

/* Drag and Drop Overlay */
.chat-content-wrapper.drag-over {
  outline: 2px dashed var(--accent-color);
  outline-offset: -4px;
  background-color: var(--accent-light);
}

.chat-content-wrapper.drag-over::after {
  content: "Drop files here to attach";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--bg-primary);
  color: var(--accent-color);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 16px;
  z-index: 100;
  pointer-events: none;
}

/* Split view styles - deprecated, browser is now a modal */
.chat-content-wrapper.split-view .messages-container {
  flex: 1;
}

.chat-content-wrapper.split-view .browser-panel {
  display: none;
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: var(--ui-padding);
  padding-bottom: 175px;
  scroll-behavior: smooth;
  transition: flex 0.3s ease;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.welcome-message {
  max-width: var(--welcome-message-width);
  margin: var(--spacing-md) auto;
  text-align: center;
  padding: var(--spacing-lg);
  background: var(--bg-welcome);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
}

.welcome-message h1 {
  font-size: 16px;
  font-weight: bold;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  max-width: 100%;
  white-space: normal;
  overflow: visible;
  word-wrap: break-word;
  text-align: center;
}

.welcome-message h1 i {
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 16px;
  background-color: var(--bg-tertiary);
}

.features {
  display: none; /* Hidden - auto reasoning mode determines features */
}

.feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--bg-tertiary);
  border: none;
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  transition: all var(--transition-normal);
}

.feature:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-color);
  transform: translateY(-1px);
}

.feature .icon {
  font-size: 16px;
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
}

/* Discussion Starters */
.discussion-starters {
  display: block;
  position: relative;
  overflow: hidden;
  /* margin: var(--spacing-xl) auto; */
  border: solid 1px transparent;
  padding: var(--ui-padding);
  width: 100%;
  /* max-width: var(--welcome-message-width); */
  animation: fadeInUp 1s ease-out 0.9s both;
}

.discussion-starters::before,
.discussion-starters::after {
  content: "";
  position: absolute;
  top: 0;
  width: 40px;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.discussion-starters::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-welcome), transparent);
}

.discussion-starters::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-welcome), transparent);
}

.discussion-starters-track {
  display: flex;
  gap: 12px;
  animation: scroll-starters 20s linear infinite;
  will-change: transform;
}

.discussion-starters-track:hover {
  animation-play-state: paused;
}

@keyframes scroll-starters {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

.discussion-starter {
  padding: var(--spacing-sm);
  background: transparent;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color var(--transition-normal);
  text-align: left;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: var(--spacing-sm);
  min-height: var(--touch-target-md);
  white-space: nowrap;
  flex-shrink: 0;
}

.discussion-starter:hover {
  background-color: var(--bg-hover);
}

.discussion-starter-icon {
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  color: var(--accent-color);
}

.discussion-starter-text {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
  line-height: normal;
  white-space: nowrap;
}

/* Messages */
.message {
  margin-bottom: var(--ui-padding);
  display: flex;
  gap: var(--spacing-md);
  max-width: var(--welcome-message-width);
  margin-left: auto;
  margin-right: auto;
}

/* User messages - column layout with avatar inside content, right aligned */
.message.user {
  flex-direction: column;
  align-items: flex-end;
  gap: 0;
}

/* Assistant messages - column layout with avatar above */
.message.assistant {
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

/* Message avatar header - contains avatar and author name */
.message-avatar-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  line-height: normal;
}

.message-author {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  line-height: 48px; /* Match avatar height for perfect vertical alignment */
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

/* User author name - white text inside blue bubble */
.message.user .message-author {
  color: var(--text-on-accent);
}

.message-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: bold;
  flex-shrink: 0;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

/* WaterBot custom SVG icon styling */
.message-avatar .waterbot-icon {
  width: 32px;
  height: 32px;
  color: var(--text-primary);
}

/* User avatar - styled when inside the blue bubble */
.message.user .message-avatar {
  background-color: transparent;
  color: var(--text-on-accent);
  border-color: rgba(255, 255, 255, 0.3);
}

/* Assistant avatar - above the message bubble with accent color and filled body */
.message.assistant .message-avatar {
  background-color: var(--bg-secondary);
  color: var(--accent-color);
  border-color: var(--border-color);
}

/* WaterBot icon in assistant message avatar - accent color with filled body */
.message.assistant .message-avatar .waterbot-icon {
  color: var(--accent-color);
}

/* Fill the body with accent color in light theme (like dark theme) */
.message.assistant .message-avatar .waterbot-icon .waterbot-body {
  fill: var(--accent-color);
  stroke: var(--accent-color);
}

/* Make eyes and smile contrast with background color in light theme */
.message.assistant .message-avatar .waterbot-icon .waterbot-eye {
  fill: var(--bg-secondary);
}

.message.assistant .message-avatar .waterbot-icon .waterbot-smile {
  stroke: var(--bg-secondary);
}

.message-content {
  flex: 1;
  position: relative;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* User message content - wrapped in single blue bubble with avatar inside */
.message.user .message-content {
  align-items: flex-start;
  background: var(--message-user-bg);
  border-radius: var(--radius-pill);
  padding: var(--ui-padding);
  width: fit-content;
  max-width: 100%;
}

/* User avatar inside the content box */
.message.user .message-content .message-avatar {
  background-color: rgba(255, 255, 255, 0.2);
  color: var(--text-on-accent);
}

/* Assistant message content - wrapped in white bubble with border */
.message.assistant .message-content {
  align-items: flex-start;
  background: var(--message-assistant-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  padding: var(--ui-padding);
  width: fit-content;
  max-width: 100%;
}

.message-text {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-size: 16px;
  /* line-height: 1.6; */
  width: 100%;
  box-sizing: border-box;
  overflow-wrap: break-word;
}

/* User message text - no separate bubble, inherits from content wrapper, left-aligned */
.message.user .message-text {
  padding: 0;
  background: transparent;
  color: var(--message-user-text);
  border-radius: var(--radius-md);
  display: block;
  width: 100%;
  font-weight: 500;
  text-align: left;
}

/* Assistant message text - no separate bubble, inherits from content wrapper */
.message.assistant .message-text {
  padding: 0;
  background: transparent;
  border-radius: var(--radius-md);
  display: block;
  width: 100%;
  text-align: left;
}

/* Message attachments - Claude-style image display */
.message-attachments {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  max-width: 100%;
}

.message-attachment-image {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  max-width: 300px;
  background: var(--bg-secondary);
}

.message-attachment-image img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 300px;
  object-fit: contain;
}

/* Message Actions */
.message-actions {
  display: flex;
  padding-top: 16px;
  margin-top: 0;
  min-height: 48px;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  position: relative;
  overflow: visible;
}

.message-actions-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.message-actions-right {
  display: flex;
  align-items: center;
  margin-left: auto;
  position: relative;
  overflow: visible;
}

/* User message actions - inside bubble */
.message.user .message-actions {
  justify-content: space-between;
  width: 100%;
}

/* Assistant message actions - inside bubble */
.message.assistant .message-actions {
  justify-content: space-between;
  width: 100%;
}

/* Message Edit Mode */
.message-edit-container {
  width: 100%;
  display: flex;
  flex-direction: column;
}

.message-edit-textarea {
  width: 100%;
  min-height: auto;
  padding: 0;
  margin: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-on-accent);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 500;
  line-height: normal;
  resize: none;
  overflow: hidden;
  white-space: pre-wrap;
  word-break: break-word;
  text-align: left;
  overflow-wrap: anywhere;
}

.message-edit-textarea::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.message-edit-actions {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-start;
  padding: 0;
  margin: 0;
  min-height: var(--touch-target);
  max-height: var(--touch-target);
  align-items: center;
}

.message-edit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  border: none;
  border-radius: 34px;
  cursor: pointer;
  font-size: 16px;
  transition: all var(--transition-normal);
}

.message-edit-btn.submit {
  background: rgba(255, 255, 255, 0.25);
  color: var(--text-on-accent);
}

.message-edit-btn.submit:hover {
  background: rgba(255, 255, 255, 0.35);
}

.message-edit-btn.cancel {
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-on-accent);
}

.message-edit-btn.cancel:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* Hide text and actions when editing */
.message.editing .message-text,
.message.editing .message-actions {
  display: none;
}

.message-actions button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition:
    background-color var(--transition-normal),
    color var(--transition-normal),
    border-color var(--transition-normal);
}

.message-actions button:hover {
  background-color: var(--bg-hover);
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* Delete message button - danger style on hover */
.message-actions .delete-button:hover {
  background-color: var(--danger-light);
  color: var(--danger-color);
  border-color: var(--danger-color);
}

/* Base action button styles */
.action-button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: visible; /* Allow popup to be visible */
  z-index: 1; /* Ensure button is above other elements */
  isolation: isolate; /* Create new stacking context */
}

.action-button:hover {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.action-button.copied {
  background-color: var(--accent-color);
  border-color: var(--accent-color);
  color: white;
}

/* Action buttons inside user message bubble */
.message.user .action-button {
  background-color: transparent;
  color: var(--text-on-accent);
  border-color: rgba(255, 255, 255, 0.3);
}

.message.user .action-button:hover {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.5);
}

/* Copy button specific styles */
.copy-button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.copy-button:hover {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.copy-button.copied {
  background-color: transparent;
  color: var(--success-color);
  border-color: var(--success-color);
  transform: none;
}

.copy-button.copied i {
  animation: checkmark-bounce 0.3s ease-in-out;
}

/* Copy button inside user message bubble */
.message.user .copy-button {
  background-color: transparent;
  color: var(--text-on-accent);
}

.message.user .copy-button:hover {
  background-color: transparent;
}

.message.user .copy-button.copied {
  background-color: transparent;
}

.copy-button.copying {
  background-color: transparent;
  color: var(--text-primary);
  border-color: var(--border-color);
  animation: pulse 0.3s ease-in-out;
}

/* Redo button specific styles */
.redo-button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.redo-button:hover {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Edit button specific styles */
.edit-button {
  width: 48px;
  height: 48px;
  min-width: 48px;
  min-height: 48px;
  max-width: 48px;
  max-height: 48px;
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.edit-button:hover {
  background-color: transparent;
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Edit button inside user message bubble */
.message.user .edit-button {
  background-color: transparent;
  color: var(--text-on-accent);
  border-color: rgba(255, 255, 255, 0.3);
}

.message.user .edit-button:hover {
  background-color: transparent;
  border-color: rgba(255, 255, 255, 0.5);
}

@keyframes pulse {
  0% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
  100% {
    opacity: 1;
  }
}

/* Preview code button for legacy blocks */
.preview-code-button {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background-color: var(--bg-secondary); /* WCAG AA compliant contrast */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
}

.preview-code-button:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--border-color);
}

/* Typing Indicator */
/* Loading skeleton animation for message */
.typing-indicator {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--spacing-sm) 0;
  width: 100%;
  max-width: 280px;
}

.typing-indicator .skeleton-line {
  height: 12px;
  border-radius: 6px;
  background: linear-gradient(
    90deg,
    var(--bg-tertiary) 25%,
    var(--bg-hover) 50%,
    var(--bg-tertiary) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s infinite ease-in-out;
}

.typing-indicator .skeleton-line:nth-child(1) {
  width: 85%;
}

.typing-indicator .skeleton-line:nth-child(2) {
  width: 100%;
}

.typing-indicator .skeleton-line:nth-child(3) {
  width: 60%;
}

@keyframes skeleton-shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Alternative dot-style loader (kept for backward compatibility) */
.typing-dots {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) 0;
}

.typing-dots span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--accent-color);
  animation: typing-bounce 1.4s infinite;
}

.typing-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes typing-bounce {
  0%,
  60%,
  100% {
    opacity: 0.3;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-4px);
  }
}

/* =========================================
   MODERN AI MARKDOWN STYLES (Gemini/Claude Hybrid)
   Clean, spacious, 16px-enforced typography
   ========================================= */

/* Container Reset */
.message-text {
  font-family: var(--font-sans);
  color: var(--text-primary);
  font-size: 16px;
  line-height: 1.6; /* Comfortable reading height */
  width: 100%;
  box-sizing: border-box;
  overflow-wrap: break-word;
  word-break: normal;
  white-space: normal;
  hyphens: none;
}

/* Force 16px on all children */
.message-text * {
  font-size: 16px;
}

/* Vertical Rhythm - The key to the "Modern AI" look */
.message-text > *:first-child {
  margin-top: 0;
}

.message-text > *:last-child {
  margin-bottom: 0;
}

/* Paragraphs */
.message-text p {
  margin: 0 0 var(--spacing-sm) 0;
  padding: 0;
  color: var(--text-primary);
  line-height: 1.4;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  hyphens: none;
}

.message-text p:last-child {
  margin-bottom: 0;
}

/* Headings - Hierarchy via Weight and Spacing (since size is fixed) */
.message-text h1,
.message-text h2,
.message-text h3,
.message-text h4,
.message-text h5,
.message-text h6 {
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--spacing-sm) 0;
  padding: 0;
  line-height: 1.4;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  hyphens: none;
}

/* H1 - Subtle underline for distinction */
.message-text h1 {
  padding: 0 0 var(--spacing-xs) 0;
  border-bottom: 1px solid var(--border-color);
  margin: 0 0 var(--spacing-sm) 0;
}

/* H6 - Muted label style */
.message-text h6 {
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 14px; /* Optional: tiny exception for labels, or keep 16px */
}

/* Lists - Clean & Indented */
.message-text ul,
.message-text ol {
  padding-left: var(--spacing-md);
  display: block;
  margin: var(--spacing-sm) 0;
}

.message-text li {
  padding-left: var(--spacing-xs);
  display: list-item;
  margin: 0 0 2px 0;
  line-height: 1.4;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  hyphens: none;
}

.message-text li:last-child {
  margin-bottom: 0;
}

.message-text li::marker {
  color: var(--text-tertiary); /* Subtle markers */
}

/* Nested lists */
.message-text li > ul,
.message-text li > ol {
  margin-bottom: 0;
}

/* Blockquotes - Claude Style */
.message-text blockquote {
  margin: var(--spacing-sm) 0;
  padding: var(--spacing-xs) 0 var(--spacing-xs) var(--spacing-md);
  border-left: 4px solid var(--accent-color);
  background: linear-gradient(90deg, var(--bg-tertiary) 0%, transparent 100%);
  color: var(--text-secondary);
  font-style: normal; /* Modern look prefers normal over italic */
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  white-space: normal;
  word-break: normal;
  overflow-wrap: break-word;
  hyphens: none;
}

/* Links */
.message-text a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease;
}

.message-text a:hover {
  border-bottom-color: var(--accent-color);
}

/* Horizontal Rule */
.message-text hr {
  border: none;
  height: 1px;
  background-color: var(--border-color);
  margin: var(--spacing-md) 0;
}

/* Bold/Italic */
.message-text strong {
  display: inline;
  font-weight: 600;
  color: var(--text-primary);
  white-space: normal;
}

.message-text em {
  display: inline;
  font-style: italic;
  color: var(--text-secondary);
  white-space: normal;
}

/* =========================================
   CODE STYLING
   ========================================= */

/* Inline Code - Pill Style */
.message-text :not(pre) > code {
  background-color: var(--bg-tertiary);
  color: var(--accent-color);
  font-family: var(--font-mono);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  white-space: pre-wrap;
  word-break: keep-all;
  overflow-wrap: normal;
  border: 1px solid var(--border-light);
}

/* Code Block Container */
.message-text .code-block-container {
  margin: var(--spacing-md) 0;
  background-color: var(--bg-code);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

/* Code Header */
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  min-height: 48px;
  max-height: 48px;
  background-color: rgba(0, 0, 0, 0.05);
  border-bottom: 1px solid var(--border-color);
  box-sizing: border-box;
  border-radius: 12px 12px 0 0;
}

.code-block-filename {
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
  display: flex;
  align-items: center;
  gap: 8px;
}

.code-block-filename::before {
  content: "\f121";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 12px;
  color: var(--accent-color);
  flex-shrink: 0;
}

.code-block-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin: 0;
  padding: 0;
  margin-left: 8px;
}

.copy-code-button {
  width: var(--touch-target);
  height: var(--touch-target);
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  max-width: var(--touch-target);
  max-height: var(--touch-target);
  margin: 0;
  padding: 0;
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.copy-code-button:hover {
  background-color: var(--accent-light);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

.copy-code-button.copied {
  background-color: var(--success-color);
  color: var(--text-on-accent);
  border-color: var(--success-color);
}

.copy-code-button.copied i {
  animation: checkmark-bounce 0.3s ease-in-out;
}

@keyframes checkmark-bounce {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.2);
  }
}

/* Code Content */
.message-text pre {
  margin: 0;
  padding: var(--spacing-md);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-code);
  background: transparent;
  border: none;
  border-radius: 0;
  box-sizing: border-box;
}

.message-text pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  margin: 0;
  border: none;
  font-size: 16px;
  white-space: pre;
  display: block;
  text-indent: 0;
  line-height: 1.4;
}

/* =========================================
   TABLES
   ========================================= */
.table-container {
  width: 100%;
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  border: 1px solid var(--border-color);
  border-radius: 12px;
}

/* Tables - Clean & Modern */
.message-text table {
  width: 100%;
  border-collapse: collapse;
  font-size: 16px;
  margin: var(--spacing-md) 0;
}

.message-text th,
.message-text td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  line-height: 1.5;
}

.message-text th {
  background-color: var(--bg-tertiary);
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
}

.message-text tr:last-child td {
  border-bottom: none;
}

.message-text tr:hover td {
  background-color: var(--bg-hover);
}

/* Input Area - Fixed at Bottom with Gradient Effect */
.input-area {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--ui-padding);
  border-right: none;
  width: 100%;
  box-sizing: border-box;
  z-index: 900;
  pointer-events: none;
}

.input-area > * {
  pointer-events: auto;
}

#chatForm {
  display: flex;
  flex-direction: column;
  margin: 0 auto;
  max-width: var(--container-max-width);
  width: 100%;
  padding: var(--ui-padding);
  background-color: var(--bg-secondary);
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-color);
  box-sizing: border-box;
  transition: all var(--transition-normal);
}

#chatForm:focus-within {
  border-color: var(--accent-color);
}

#chatForm > * {
  margin-bottom: var(
    --element-spacing-x2
  ); /* Uniform spacing between elements */
}

#chatForm > *:last-child {
  margin-bottom: 0;
}

/* Chat Input Wrapper - Pill-shaped Design */
.chat-input-wrapper {
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 100%; /* Full width within form container */
  margin: 0 auto;
  min-height: var(--touch-target);
  max-height: none;
  box-sizing: border-box;

  background: var(--bg-input); /* Light grey textarea background */
  border-radius: var(--radius-pill); /* Pill-shaped design */
  border: 1px solid var(--border-color); /* Add border */
  transition: all var(--transition-normal);
}

.chat-input-wrapper:focus-within {
  border-color: var(--accent-color);
  background: var(--bg-input); /* Light grey textarea background */
  border-radius: var(--radius-pill); /* Pill-shaped design */
  border: 1px solid var(--border-color); /* Add border */
  transition: all var(--transition-normal);
}

/* Input Info Row - Perfect Alignment and Spacing */
.input-info-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--element-spacing); /* Uniform spacing between elements */
  box-sizing: border-box;
  /* Remove side padding to flush with container edges */
}

.input-info-row > * {
  flex-shrink: 0;
}

.input-info-row > *:last-child {
  margin-right: 0;
}

.input-info-left {
  display: flex;
  align-items: center;
  gap: var(--element-spacing); /* Uniform spacing between buttons */
  /* Remove extra left padding so buttons align flush with row padding */
}

.input-info-left > * {
  flex-shrink: 0;
}

.input-info-left > *:last-child {
  margin-right: 0;
}

#messageInput {
  flex: 1;
  width: 100%;
  padding: calc((var(--touch-target) - 20px) / 2) var(--form-padding);
  min-height: var(--touch-target);
  background-color: transparent;
  border: none;
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-size: 16px;
  font-family: var(--font-sans);
  line-height: normal;
  transition: all var(--transition-normal);
  box-sizing: border-box;
  margin: 0;
  display: flex;
  align-items: center;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 50vh; /* Limit to 50% of viewport height */
}

#messageInput::placeholder {
  color: var(--text-tertiary);
  opacity: 0.8; /* Better visibility */
}

/* Contenteditable div placeholder styling */
.contenteditable-div:empty::before {
  content: attr(data-placeholder);
  color: var(--text-tertiary);
  opacity: 0.8;
  pointer-events: none;
}

.contenteditable-div:focus {
  outline: none;
}

/* Auto-expansion behavior */
.contenteditable-div {
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  box-sizing: border-box;
}

/* Ensure smooth transitions for responsive behavior */

/* Button Styles - Perfect Circle Design */
.upload-toggle-container {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.btn-upload-toggle {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-perfect-circle);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  flex-shrink: 0;
  font-size: 16px;
}

.btn-upload-toggle:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-upload-toggle:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
}

.btn-upload-toggle.active {
  background-color: var(--bg-input);
  color: var(--text-primary);
  border-color: var(--border-color);
}

.btn-upload-toggle.active i {
  transform: rotate(45deg);
  color: var(--accent-color);
}

.btn-upload-toggle i {
  transition: transform var(--transition-normal);
}

/* Upload options container that expands outward */
.upload-options {
  display: none;
  align-items: center;
  gap: var(--spacing-sm);
  animation: slideOut 0.3s ease-out;
}

.upload-options.visible {
  display: flex;
}

/* Paperclip button within the expanded options */
.btn-upload-option {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background: linear-gradient(135deg, var(--bg-secondary), var(--bg-tertiary));
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-perfect-circle);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  flex-shrink: 0;
  font-size: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  animation: fadeIn 0.3s ease-out;
}

.btn-upload-option:hover {
  background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-secondary));
  color: var(--accent-color);
  border-color: var(--accent-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

/* Animations for the expanding mechanism */
@keyframes slideOut {
  from {
    opacity: 0;
    transform: translateX(-10px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.btn-upload-doc {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background-color: transparent;
  color: var(--text-primary); /* Enhanced contrast - WCAG AA compliant */
  border: 1px solid var(--border-color);
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  flex-shrink: 0;
  font-size: 16px;
  /* Keep as fixed 48px circle; do not stretch to fill */
}

.btn-upload-doc:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
}

/* Upload Preview - Claude.ai Style (Dark Code Preview Cards) */

/* Upload Preview - Claude.ai Style (Dark Code Preview Cards) */
.upload-preview {
  max-width: 900px;
  margin: 0 auto var(--spacing-md);
  background: linear-gradient(
    135deg,
    rgba(42, 42, 42, 0.6),
    rgba(58, 58, 58, 0.4)
  );
  border-radius: 16px;
  padding: var(--spacing-md);
  border: 1px solid var(--border-color);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.upload-preview-content {
  display: flex;
  padding: var(--spacing-sm);
  flex-direction: column;
}

.attachment-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  min-height: 40px; /* Ensure visible even when empty */
}

/* Claude.ai style preview cards */
.attachment-chip {
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  overflow: hidden;
  width: 240px;
  position: relative;
  transition: all 0.2s ease;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.attachment-chip:hover {
  border-color: var(--accent-color);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.attachment-chip-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
}

.attachment-chip-info {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  min-width: 0;
}

.attachment-size {
  font-size: 10px;
  color: var(--text-tertiary);
  background: var(--bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
}

.attachment-type-label {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-secondary);
  background: linear-gradient(135deg, var(--bg-hover), var(--bg-tertiary));
  padding: 3px 8px;
  border-radius: 6px;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100px;
  border: 1px solid var(--border-color);
}

.attachment-chip .upload-remove {
  width: 24px;
  height: 24px;
  min-width: 24px;
  min-height: 24px;
  background: transparent;
  color: var(--text-tertiary);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s ease;
  font-size: 16px;
}

.attachment-chip .upload-remove:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.attachment-preview {
  padding: 12px;
  min-height: 90px;
  max-height: 140px;
  overflow: hidden;
  background: var(--bg-primary);
}

.attachment-preview.text-preview {
  padding: 0;
  background: transparent;
}

.text-preview-content {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.preview-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  min-height: 32px;
}

.file-name {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  max-width: 120px;
}

.word-count {
  font-size: 10px;
  color: var(--text-tertiary);
  background: var(--bg-hover);
  padding: 2px 6px;
  border-radius: 4px;
  white-space: nowrap;
  margin-left: 8px;
}

.preview-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0 0 12px 12px;
}

.attachment-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid var(--border-color);
}

.attachment-code {
  font-family: "SF Mono", "Monaco", "Inconsolata", "Fira Code", monospace;
  font-size: 11px;
  line-height: 1.5;
  color: var(--text-secondary);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  overflow: hidden;
  background: var(--bg-primary);
  padding: 12px;
  border-radius: 0 0 12px 12px;
  border: none;
  max-height: 100px;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

.attachment-code::-webkit-scrollbar {
  width: 4px;
}

.attachment-code::-webkit-scrollbar-track {
  background: transparent;
}

.attachment-code::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 2px;
}

/* Upload remove button standalone (not in chip) */
.upload-remove {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background-color: var(--bg-secondary);
  color: var(--text-primary);
  border: none;
  border-radius: var(--radius-perfect-circle);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  font-size: 16px;
}

.upload-remove:hover {
  background-color: var(--danger-color);
  color: white;
}

.upload-file-name {
  flex: 1;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

.context-warning {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--warning-color);
  color: var(--text-primary);
  border: none; /* Borderless design */
  border-radius: var(--radius-xl); /* Larger pill shape */
  font-size: 16px;
  margin: 0 auto var(--spacing-sm) auto;
  max-width: 900px;
  text-align: center;
}

.upload-progress {
  margin-top: var(--spacing-md);
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: 2px;
  overflow: hidden;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
}

.upload-progress-bar {
  height: 100%;
  background: linear-gradient(
    90deg,
    var(--accent-color),
    var(--accent-color-light, #7dd3fc)
  );
  border-radius: 2px;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  width: 0%;
}

.input-info {
  font-size: 16px;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-sm);
  padding: var(--spacing-sm);
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 var(--spacing-sm);
}

.input-info-left {
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
}

.input-hint {
  flex: 1;
  text-align: center;
  font-size: 16px;
}

.web-search-toggle {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  cursor: pointer;
  padding: var(--spacing-xs) var(--spacing-sm);
  border: none; /* Borderless design */
  border-radius: var(--radius-pill); /* Pill-shaped design */
  background-color: var(--bg-secondary); /* Enhanced contrast */
  transition: all var(--transition-normal);
  -webkit-user-select: none;
  user-select: none;
}

.web-search-toggle:hover {
  background-color: var(--bg-hover);
  border-color: transparent; /* Borderless design */
}

.web-search-toggle input[type="checkbox"] {
  width: 16px;
  height: 16px;
  cursor: pointer;
  accent-color: var(--accent-color);
}

.web-search-toggle i {
  font-size: 16px;
  color: var(--accent-color);
}

.web-search-toggle span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-primary);
}

/* Buttons */
.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--accent-color); /* WCAG AA compliant contrast */
  color: var(--text-on-accent); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: bold;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.btn-primary:hover {
  background-color: rgba(30, 144, 255, 0.9);
  transform: none;
}

.btn-primary:active {
  transform: translateY(0);
}

/* Send Button - Perfect Circle Design */
.btn-send {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  max-height: var(--touch-target-circle);
  background-color: var(--accent-color); /* WCAG AA compliant contrast */
  color: white; /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  flex-shrink: 0;
  width: var(--touch-target-circle);
  max-width: var(--touch-target-circle);
  margin-right: 0; /* Flush to right edge when row has no padding */
}

.btn-send:hover:not(:disabled):not(.disabled) {
  background-color: var(--accent-hover);
  transform: none;
}

.btn-send:disabled,
.btn-send.disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
  filter: grayscale(50%);
}

.btn-send:disabled svg,
.btn-send.disabled svg {
  animation: none;
}

/* Stop button state - shown during generation */
.btn-send.generating {
  background-color: var(--danger-color);
  cursor: pointer;
  opacity: 1;
  pointer-events: auto;
}

.btn-send.generating:hover {
  background-color: var(--danger-color);
  opacity: 0.9;
}

.btn-send.generating .stop-icon {
  width: 14px;
  height: 14px;
  background-color: white;
  border-radius: 2px;
}

.btn-delete {
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--bg-secondary); /* Restore previous background */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: bold;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
}

.btn-delete:hover {
  background-color: var(--danger-color);
  color: white;
  border-color: var(--danger-color);
  transform: none;
}

/* Scrollbar - subtle light grey */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(180, 180, 180, 0.4);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(160, 160, 160, 0.6);
}

/* Browser Modal */
.browser-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 10000;
  animation: fadeIn 0.2s ease-in-out;
}

.browser-modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 1;
}

.browser-modal-content {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  /* Explicit 16px breathing room around the modal */
  width: calc(100vw - 32px);
  height: calc(100vh - 32px);
  max-width: 1400px;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 2;
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes modalSlideIn {
  from {
    transform: translate(-50%, -48%);
    opacity: 0;
  }
  to {
    transform: translate(-50%, -50%);
    opacity: 1;
  }
}

.browser-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
  gap: var(--spacing-sm);
}

.browser-modal-close {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  border: none;
  border-radius: var(--radius-perfect-circle);
  color: var(--text-primary);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.browser-modal-close:hover {
  background-color: #ff4444;
  color: white;
}

/* Browser URL Display */
.browser-url-display {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-tertiary);
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
  color: var(--text-secondary);
}

.browser-url-display i {
  color: var(--accent-color);
  font-size: 12px;
}

.browser-url-display span {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-family: var(--font-mono);
}

/* Browser Accessibility Panel */
.browser-a11y-panel {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 40%;
  min-width: 300px;
  background: var(--bg-primary);
  border-left: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  min-height: 0;
  z-index: 10;
  box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
}

.browser-a11y-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.browser-a11y-header h4 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.browser-a11y-header h4 i {
  color: var(--accent-color);
}

.browser-a11y-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.browser-a11y-close:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.browser-a11y-content {
  flex: 1;
  overflow: auto;
  min-height: 0;
  overscroll-behavior: contain;
  padding: var(--spacing-md);
  margin: 0;
  font-size: 12px;
  line-height: 1.6;
  font-family: var(--font-mono);
  color: var(--text-primary);
  background: var(--bg-primary);
  white-space: pre-wrap;
  word-wrap: break-word;
  height: 100%;
}

/* Old browser panel styles - deprecated */
.browser-panel {
  display: none;
}

.browser-header {
  display: none;
}

.browser-controls {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: thin;
  scrollbar-color: rgba(180, 180, 180, 0.4) transparent;
  width: 100%;
}
.browser-controls::-webkit-scrollbar {
  height: 6px;
}
.browser-controls::-webkit-scrollbar-thumb {
  background-color: rgba(180, 180, 180, 0.4);
  border-radius: 4px;
}

.browser-btn {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary);
  border: none; /* borderless design */

  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  cursor: pointer;
  transition:
    background-color 0.2s ease,
    color 0.2s ease;
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  flex: 0 0 auto;
}
.browser-btn:hover {
  background-color: var(--accent-light);
}

.browser-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.browser-btn:disabled:hover {
  background-color: var(--bg-secondary);
}
.browser-btn i {
  font-size: 16px;
}

.browser-btn-primary {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background-color: var(--accent-color);
  color: white;
  border: none;

  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  flex: 0 0 auto;
}
.browser-btn-primary:hover {
  background-color: var(--accent-hover);
}

.browser-url-bar {
  flex: 1;
  padding: 0 var(--spacing-md);
  height: var(--touch-target);
  min-height: var(--touch-target);
  background: var(--accent-light);
  border: none;

  border-radius: var(--radius-xl); /* Larger pill shape */
  color: var(--text-primary);
  font-size: 16px;
  font-family: var(--font-sans);
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
}

.browser-url-bar:focus {
  background-color: var(--bg-tertiary);
}

.browser-close {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
}

.browser-viewport {
  flex: 1;
  overflow: hidden;
  min-height: 0;
  position: relative;
  background: var(--bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Ensure streamed Playwright screenshots actually render (parent must have a definite height) */
.browser-content {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.browser-content img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.browser-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--text-secondary);
}

.browser-loading i {
  font-size: 16px;
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
  margin-bottom: var(--spacing-md);
}

.browser-loading p {
  font-size: 16px;
  margin: 0;
}

.browser-toggle-btn {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: transparent;
  color: var(--text-primary);
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
}

.browser-toggle-btn i {
  font-size: 16px;
}

/* Claude.ai-style Toggle Buttons */

/* Tooltip for toggle buttons */

/* Visualization Panel */
.visualization-panel {
  display: none;
  flex-direction: column;
  background-color: var(--bg-primary);
  border: 1px solid var(--border-color);
  overflow: hidden;
}

.visualization-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md);
  background: var(--bg-secondary);
}

.visualization-header h3 {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

.visualization-header h3 i {
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
}

.visualization-close {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-secondary); /* WCAG AA compliant contrast */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
}

.visualization-content {
  flex: 1;
  overflow: auto;
  padding: var(--spacing-md);
}

.visualization-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
}

/* Focus styles for accessibility */
*:focus-visible {
  border-color: var(--border-color);
}

button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible {
  border-color: var(--border-color);
}

/* Remove browser autofill/autocomplete yellow highlight */
input:-webkit-autofill,
input:-webkit-autofill:hover,
input:-webkit-autofill:focus,
input:-webkit-autofill:active,
textarea:-webkit-autofill,
textarea:-webkit-autofill:hover,
textarea:-webkit-autofill:focus,
textarea:-webkit-autofill:active,
select:-webkit-autofill,
select:-webkit-autofill:hover,
select:-webkit-autofill:focus,
select:-webkit-autofill:active {
  -webkit-text-fill-color: var(--text-primary) !important;
  caret-color: var(--text-primary);
  transition: background-color 5000s ease-in-out 0s;
}

/* Remove focus ring/outline that browsers add */
input:focus,
textarea:focus,
select:focus {
  outline: none;
}

/* Admin Panel Styles */
.admin-container {
  min-height: 100vh;
  background-color: var(--bg-primary);
  padding-top: var(--navbar-height);
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
  padding-bottom: var(--spacing-2xl);
}

/* Tab Navigation */
.admin-tabs {
  display: flex;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: var(--spacing-2xs);
  margin: var(--spacing-2xl) 0 var(--spacing-lg) 0;
  gap: var(--spacing-2xs);
}

.admin-tab {
  flex: 1;
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--bg-secondary); /* WCAG AA compliant contrast */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
}

.admin-tab.active {
  background-color: var(--bg-primary);
  color: var(--accent-color);
}

.admin-tab i {
  font-size: 16px;
}

/* Tab Content */
.admin-tab-content {
  display: none;
  background-color: var(--bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
}

.admin-tab-content.active {
  display: block;
}

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-md);
  border-bottom: none;

  background-color: var(--bg-secondary); /* Different shade from surrounding */
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
}

.section-header h2 {
  font-size: 16px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

.section-header h2 i {
  color: var(--accent-color);
}

/* File Upload Section */
.file-upload-section {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.file-upload-section h3 {
  font-size: 16px;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

.file-upload-section h3 i {
  color: var(--accent-color);
}

/* Form Groups */
.form-group {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.form-group:last-child {
  margin-bottom: 0;
}

/* Documents List */
.documents-list {
  background-color: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  min-height: 200px;
}

/* Submit Button Container */
.submit-button-container {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: none;

  display: flex;
  justify-content: center;
  min-height: var(--touch-parent);
  max-height: var(--touch-parent);
  align-items: center;
}

.panel-section {
  background: var(--bg-secondary);
  border-radius: 16px;
  padding: var(--spacing-lg);
  border: 2px solid transparent;
  margin-bottom: var(--spacing-md);
}

.panel-section h2 {
  font-size: 16px;
  margin-bottom: var(--spacing-lg);
  color: var(--text-primary);
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

.panel-section h2 i {
  color: var(--accent-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--bg-tertiary);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-lg);
}

.section-header h2 {
  margin-bottom: 0;
}

/* Enhanced Form Styling */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: var(--spacing-md);
  min-height: var(--touch-target);
  background-color: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: 16px;
  color: var(--text-primary);
  font-size: 16px;
  font-family: inherit;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  align-items: flex-start;
  padding-top: var(--spacing-md);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--border-color);
  background-color: var(--bg-tertiary);
}

/* Enhanced Button Styling */
.btn-secondary {
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--bg-secondary); /* Restore previous background */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
}

.btn-secondary i {
  font-size: 16px;
}

.btn-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Primary Button */
.btn-primary {
  padding: var(--button-py) var(--button-px);
  min-height: var(--touch-target);
  background-color: var(--accent-color);
  color: var(--text-on-accent);
  border: none;
  border-radius: var(--button-radius);
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
}

.btn-primary i {
  font-size: 16px;
}

/* Tag Container Styling */
.tag-container {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--bg-primary);
  border: none;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

.tag-container i {
  font-size: 16px;
  color: var(--accent-color);
}

/* Document Tags Display */
.document-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-sm);
}

.document-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-xs);
  background-color: var(--accent-light);
  color: var(--accent-color);
  border-radius: 12px;
  font-size: 16px;
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 200px;
}

.document-tag i {
  font-size: 16px;
}

.documents-list {
  max-height: 600px;
  overflow-y: auto;
  padding: var(--spacing-sm);
}

.document-item {
  padding: var(--spacing-lg);
  background: var(--bg-primary);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  transition: all 0.2s ease;
}

.document-header {
  display: flex;
  justify-content: space-between;
  align-items: start;
  margin-bottom: var(--spacing-md);
}

.document-title {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  flex: 1;
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.document-title i {
  color: var(--accent-color);
  font-size: 16px;
}

.document-actions {
  display: flex;
  padding: var(--spacing-sm);
  min-height: var(--touch-parent);
  max-height: var(--touch-parent);
  align-items: center;
}

.btn-small {
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  font-size: 16px;
  font-weight: 500;
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
}

.btn-delete-small {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  background-color: var(--bg-secondary); /* Restore previous background */
  color: var(--danger-color); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
}

.document-content {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: normal;
  margin-bottom: var(--spacing-md);
  max-height: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  background-color: var(--bg-secondary);
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
}

.document-meta {
  font-size: 16px;
  color: var(--text-tertiary);
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  margin-bottom: var(--spacing-sm);
}

.document-meta span {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.document-meta i {
  color: var(--accent-color);
}

.success-message {
  padding: var(--spacing-md);
  background-color: rgba(52, 208, 88, 0.1);
  border-radius: var(--radius-sm);
  color: var(--success-color);
  margin-bottom: var(--spacing-lg);
  animation: fadeIn 0.3s;
}

.error-message {
  padding: var(--spacing-md);
  background-color: rgba(248, 81, 73, 0.1);
  border-radius: var(--radius-sm);
  color: var(--danger-color);
  margin-bottom: var(--spacing-lg);
  animation: fadeIn 0.3s;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* File Upload Section */
.file-upload-section {
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
}

.file-upload-section h3 {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
}

.file-upload-section h3 i {
  color: var(--accent-color);
}

.file-upload-buttons {
  display: flex;
  align-items: center;
  padding: var(--spacing-md);
}

.btn-upload {
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--accent-color); /* WCAG AA compliant contrast */
  color: white; /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  font-size: 16px;
  font-weight: bold;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  transition: all 0.2s ease;
}

.file-name {
  color: var(--text-secondary);
  font-size: 16px;
}

/* Divider */
.divider {
  text-align: center;
  color: var(--text-secondary);
  margin: var(--spacing-lg) 0;
  position: relative;
  font-size: 16px;
  font-weight: 500;
}

.divider::before,
.divider::after {
  content: "";
  position: absolute;
  top: 50%;
  width: 45%;
  height: 2px;
  background-color: var(--bg-tertiary);
}

.divider::before {
  left: 0;
}

.divider::after {
  right: 0;
}

/* Input with Button */
.input-with-button {
  display: flex;
  padding: var(--spacing-sm);
  min-height: var(--touch-parent);
  max-height: var(--touch-parent);
  align-items: center;
}

.input-with-button input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-sm);
  min-height: 48px;
  background-color: var(--bg-tertiary);
  border: 2px solid transparent;
  border-radius: 25px;
  color: var(--text-primary);
  font-size: 16px;
  font-family: var(--font-sans);
  transition: all 0.2s ease;
}

/* AI Buttons */
.btn-ai {
  padding: var(--spacing-md);
  height: var(--touch-target-circle);
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
  background-color: var(--accent-color); /* WCAG AA compliant contrast */
  color: white; /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm);
  white-space: nowrap;
}

.btn-ai:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Content Actions */
.content-actions {
  display: flex;
  padding: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  flex-wrap: wrap;
}

.input-group-container {
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.input-group-container .form-group {
  margin-bottom: 0;
}

/* Theme toggle script initialization for admin page */
.admin-container + script {
  display: none;
}

/* Conversation actions menu */
.conversation-menu-btn {
  height: var(--touch-target);
  min-width: var(--touch-target);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: transparent;
  color: var(--text-primary);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: all 0.2s ease;
  flex-shrink: 0;

  margin-right: 0;
  width: var(--touch-target);
  gap: 0;
}

.conversation-menu {
  position: absolute;
  top: calc(100% - var(--spacing-sm));
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  min-width: 160px;
  padding: 10px;
  display: none;
  z-index: 1000;

  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--transition-normal),
    transform var(--transition-normal);
}

.conversation-menu.open {
  display: block;
  animation: menuFadeIn var(--transition-normal) forwards;
}

@keyframes menuFadeIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.conversation-menu .menu-item {
  width: 100%;
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  padding: 10px 10px;
  background: transparent;
  color: var(--text-primary);
  border: none;
  border-radius: var(--radius-pill);
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: all var(--transition-normal);
  margin-bottom: 0;
  white-space: nowrap;
  gap: 8px;
}

.conversation-menu .menu-item:last-child {
  margin-bottom: 0;
}

.conversation-menu .menu-item:hover {
  background-color: var(--bg-hover);
  transform: none;
}

.conversation-menu .menu-item i {
  font-size: 16px;
  width: 20px;
  text-align: center;
}

.conversation-menu .menu-item.delete {
  color: var(--danger-color);
}

.conversation-menu .menu-item.delete:hover {
  background-color: var(--bg-tertiary);
  color: var(--danger-color);
}

/* Confirmation overlay */
.confirm-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.confirm-dialog {
  background: var(--bg-primary);
  border: none;

  border-radius: 16px;
  padding: var(--spacing-lg);
  min-width: 280px;
}

.confirm-title {
  color: var(--text-primary);
  font-size: 16px;
  font-weight: bold;
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.confirm-actions {
  display: flex;
  padding: var(--spacing-sm);
  justify-content: flex-end;
}

.confirm-action-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  height: var(--touch-target);
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
}

.confirm-action-cancel {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

.confirm-action-delete {
  background-color: var(--danger-color);
  color: white;
}

.file-input-hidden {
  display: none;
}

/* Settings Toggle Button */
.settings-toggle-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  background-color: var(--bg-secondary);
  border: none;
  width: var(--touch-target);
  height: var(--touch-target);
  background-color: transparent;
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  color: var(--text-primary);
}

.settings-toggle-btn i {
  color: var(--accent-color);
}

/* Settings Panel */
.settings-panel {
  position: fixed;
  top: 0;
  right: calc(-1 * var(--sidebar-width));
  bottom: 0;
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  max-width: var(--sidebar-width);
  background: #ffffff;
  border-left: 1px solid var(--border-color);
  border-radius: var(--radius-lg) 0 0 var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 1200;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.settings-panel.visible {
  right: 0;
}

.settings-header {
  height: var(--navbar-height);
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: none;
  background: var(--bg-tertiary); /* Different shade from surrounding */
}

.settings-header h3 {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

.settings-header h3::before {
  content: "\f013";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 16px;
}

.settings-close-btn {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
}

.settings-close-btn:hover {
  background: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
}

.settings-content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Config Groups */
.config-group {
  background: var(--bg-tertiary);
  border-radius: 16px;
  padding: var(--spacing-lg);
  border: none;
  transition: all 0.2s ease;
}

.group-header {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: none;

  background-color: var(--bg-primary); /* Different shade from surrounding */
  padding: var(--spacing-md);
  border-radius: var(--radius-sm);
}

.group-header i {
  font-size: 16px;
  color: var(--accent-color);
  width: 24px;
  text-align: center;
}

.group-header h3 {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  min-width: 0;
}

/* Control Rows */
.control-row {
  margin-bottom: 20px;
}

.control-row:last-child {
  margin-bottom: 0;
}

.control-label {
  display: block;
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  margin-bottom: 8px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.control-wrapper {
  position: relative;
}

.control-hint {
  font-size: 16px;
  color: var(--text-tertiary);
  margin-top: 6px;
  font-style: italic;
}

/* Prompt Input */
.prompt-input {
  width: 100%;
  min-height: 80px;
  padding: var(--ui-padding);
  background: var(--bg-secondary);
  border: 2px solid transparent;
  border-radius: 12px;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: normal;
  resize: vertical;

  transition: all 0.3s ease;
}

.prompt-input:focus {
  background: var(--bg-primary);
  border-color: var(--border-color);
}

.prompt-input::placeholder {
  color: var(--text-tertiary);
}

/* Range Controls */
.range-control {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: var(--ui-padding);
  background: var(--bg-secondary);
  border-radius: 25px;
  border: 2px solid transparent;
  transition: all 0.2s ease;
}

.range-input {
  flex: 1;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 25px;

  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
  border: none;
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 24px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
}

.range-input::-moz-range-thumb {
  width: 24px;
  height: 24px;
  background: var(--accent-color);
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid transparent;
}

.range-track {
  position: absolute;
  height: 6px;
  background: var(--accent-color);
  border-radius: 3px;
  pointer-events: none;
}

.range-number {
  width: 80px;
  padding: 8px 12px;
  background: var(--bg-tertiary); /* Different shade for better visibility */
  border: none;
  border-radius: 8px;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 500;
  text-align: center;

  transition: all 0.2s ease;
}

.range-number:focus {
  background: var(--bg-tertiary);
  border-color: transparent;
}

/* Toggle Groups */
.toggle-group {
  display: flex;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs);
  background: var(--bg-tertiary);
  border-radius: 12px;
}

.toggle-option {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-sm);
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
}

.toggle-option.active {
  background: var(--accent-color);
  color: white;
}

.toggle-option i {
  font-size: 16px;
}

/* Settings Navbar */
.settings-navbar {
  position: sticky;
  top: 0;
  height: 60px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-secondary);
  border-bottom: none;

  z-index: 10;
}

.settings-nav-left {
  display: flex;
  align-items: center;
}

.settings-nav-right {
  display: flex;
  align-items: center;
}

.settings-nav-admin-btn {
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  padding: var(--button-py) var(--button-px);
  background: var(--accent-color);
  color: white;
  text-decoration: none;
  border-radius: var(--button-radius);
  font-size: 16px;
  font-weight: 500;
  transition: all 0.2s ease;
}

.settings-nav-admin-btn i {
  font-size: 16px;
}

/* Theme Toggle Button */
.theme-toggle-btn {
  width: var(--touch-target-circle);
  height: var(--touch-target-circle);
  min-width: var(--touch-target-circle);
  min-height: var(--touch-target-circle);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-secondary); /* WCAG AA compliant contrast */
  color: var(--text-primary); /* WCAG AA compliant contrast */
  border: none; /* Borderless design */
  border-radius: var(--radius-perfect-circle); /* Perfect circle */
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  width: 100%; /* Fill parent container width */
  max-width: var(--touch-target-circle); /* Maintain perfect circle */
}

/* Global Button Sizing Enforcement */
button {
  height: var(--touch-target);
  min-height: var(--touch-target);
  max-height: var(--touch-target);
}

/* Common button classes adhere to 48px height */
.btn-primary,
.btn-secondary,
.btn-delete,
.btn-small,
.btn-ai,
.btn-upload,
.admin-tab,
.conversation-menu-btn,
.confirm-action-btn,
.upload-remove,
.search-clear-btn,
.settings-close-btn,
.sidebar-new-chat-btn,
.btn-upload-doc,
.btn-send {
  height: var(--touch-target);
  min-height: var(--touch-target);
  max-height: var(--touch-target);
}

.theme-toggle-btn .theme-icon {
  font-size: 16px;
  transition: all 0.3s ease;
}

/* Dark theme specific styles for toggle */
[data-theme="dark"] .theme-toggle-btn {
  background: var(--bg-tertiary);
}

[data-theme="dark"] .theme-toggle-btn .theme-icon {
  color: #ffd700;
}

[data-theme="light"] .theme-toggle-btn .theme-icon {
  color: #ff8c00;
}

/* Settings Navbar */
.settings-navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-sm);
  background-color: var(--bg-secondary);
  border-bottom: none;

  margin-bottom: 16px;
}

.settings-navbar .admin-link {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: background-color 0.2s ease;
}

/* Welcome Message Styles */
.welcome-message {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--ui-padding);
  max-width: var(--container-max-width);
  margin: 0 auto;
  /* min-height: 60vh; */
}

.welcome-robot::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      ellipse at 60% 40%,
      rgba(255, 255, 255, 0.4) 0%,
      transparent 30%
    ),
    radial-gradient(
      ellipse at 20% 70%,
      rgba(255, 255, 255, 0.3) 0%,
      transparent 25%
    );
  border-radius: var(--radius-circle);
  animation: liquidRipple 4s ease-in-out infinite;
  mix-blend-mode: overlay;
}

.welcome-robot i {
  font-size: 16px;
  color: rgba(30, 144, 255, 0.9);
  z-index: 2;
  position: relative;
  animation:
    robotLookAround 6s ease-in-out infinite,
    liquidDistortion 5s ease-in-out infinite;
  transform-origin: center center;
  filter: drop-shadow(0 0 10px rgba(30, 144, 255, 0.6))
    drop-shadow(0 0 20px rgba(135, 206, 250, 0.4))
    drop-shadow(0 0 30px rgba(173, 216, 230, 0.2));
  text-shadow:
    0 0 10px rgba(30, 144, 255, 0.8),
    0 0 20px rgba(135, 206, 250, 0.6),
    0 0 30px rgba(173, 216, 230, 0.4);
}

.welcome-robot i::before,
.welcome-robot i::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.9) 20%,
    rgba(173, 216, 230, 0.8) 40%,
    rgba(135, 206, 250, 0.6) 80%
  );
  border-radius: 50%;
  z-index: 3;
  animation:
    eyeballBlink 4s ease-in-out infinite,
    liquidEyeFloat 3s ease-in-out infinite;
}

.welcome-robot i::before {
  top: 10px;
  left: 6px;
}

.welcome-robot i::after {
  top: 10px;
  right: 6px;
}

.welcome-message h1 {
  font-size: 16px;
  font-weight: bold;
  color: var(--text-primary);
  margin: var(--spacing-md);
  animation: fadeInUp 1s ease-out 0.5s both;
}

.welcome-message p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: normal;
  animation: fadeInUp 1s ease-out 0.7s both;
}

.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  width: 100%;
  animation: fadeInUp 1s ease-out 1.1s both;
}

.feature {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-secondary);
  border-radius: var(--radius-xl); /* Larger pill shape */
  border: none; /* Borderless design */
  transition: all var(--transition-normal);
}

.feature:hover {
  background: var(--bg-tertiary);
  transform: none;

  border: none; /* Maintain borderless design */
}

.feature i {
  font-size: 16px;
  color: var(--accent-color);
  flex-shrink: 0;
}

.feature span {
  font-size: 16px;
  color: var(--text-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Robot Animations */
@keyframes robotFloat {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes robotLookAround {
  0%,
  20% {
    transform: rotate(0deg);
  }
  25%,
  35% {
    transform: rotate(-15deg);
  }
  40%,
  60% {
    transform: rotate(0deg);
  }
  65%,
  75% {
    transform: rotate(15deg);
  }
  80%,
  100% {
    transform: rotate(0deg);
  }
}

@keyframes liquidPulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes liquidFlow {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(0deg);
  }
  25% {
    transform: translateX(-50%) translateY(-50%) rotate(90deg);
  }
  50% {
    transform: translateX(0%) translateY(0%) rotate(180deg);
  }
  75% {
    transform: translateX(50%) translateY(50%) rotate(270deg);
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(360deg);
  }
}

@keyframes bubbleFloat {
  0%,
  100% {
    opacity: 0.6;
    transform: translateY(0px) scale(1);
  }
  25% {
    opacity: 0.8;
    transform: translateY(-10px) scale(1.1);
  }
  50% {
    opacity: 1;
    transform: translateY(-5px) scale(0.9);
  }
  75% {
    opacity: 0.7;
    transform: translateY(-15px) scale(1.05);
  }
}

@keyframes liquidRipple {
  0%,
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 0.3;
  }
  25% {
    transform: scale(1.1) rotate(90deg);
    opacity: 0.5;
  }
  50% {
    transform: scale(0.9) rotate(180deg);
    opacity: 0.7;
  }
  75% {
    transform: scale(1.05) rotate(270deg);
    opacity: 0.4;
  }
}

@keyframes liquidDistortion {
  0%,
  100% {
    transform: skew(0deg, 0deg) scale(1);
  }
  25% {
    transform: skew(1deg, -0.5deg) scale(1.02);
  }
  50% {
    transform: skew(-0.5deg, 1deg) scale(0.98);
  }
  75% {
    transform: skew(-1deg, 0.5deg) scale(1.01);
  }
}

@keyframes liquidEyeFloat {
  0%,
  100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-2px) scale(1.1);
  }
}

@keyframes eyeballBlink {
  0%,
  90%,
  100% {
    opacity: 1;
    transform: scaleY(1);
  }
  95% {
    opacity: 0.8;
    transform: scaleY(0.1);
  }
}

@keyframes robotShimmer {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(45deg);
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(45deg);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Dark theme adjustments */
[data-theme="dark"] .welcome-robot {
  background:
    radial-gradient(
      ellipse at 30% 20%,
      rgba(70, 130, 180, 0.8) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 70% 80%,
      rgba(25, 25, 112, 0.6) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(72, 61, 139, 0.4) 0%,
      transparent 70%
    ),
    linear-gradient(
      135deg,
      rgba(47, 79, 79, 0.9) 0%,
      rgba(70, 130, 180, 0.7) 50%,
      rgba(25, 25, 112, 0.8) 100%
    );
}

[data-theme="dark"] .welcome-robot i {
  color: rgba(135, 206, 235, 0.9);
  filter: drop-shadow(0 0 10px rgba(135, 206, 235, 0.7))
    drop-shadow(0 0 20px rgba(70, 130, 180, 0.5))
    drop-shadow(0 0 30px rgba(25, 25, 112, 0.3));
  text-shadow:
    0 0 10px rgba(135, 206, 235, 0.9),
    0 0 20px rgba(70, 130, 180, 0.7),
    0 0 30px rgba(25, 25, 112, 0.5);
}

[data-theme="dark"] .feature:hover {
  border-color: var(--border-color);
}

/* Accessible focus-visible styles across interactive elements */
:where(
  a,
  button,
  [role="button"],
  .btn-primary,
  .admin-tab,
  .sidebar-new-chat-btn,
  .conversation-menu-btn,
  .confirm-action-btn
):focus-visible {
  border-color: var(--border-color);
}
/* Liquid Character Styles */
.slime-avatar {
  width: 80%;
  height: 80%;
}

.welcome-robot {
  width: 180px;
  height: 180px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(210, 210, 210, 0.25);
  border-radius: 50%;

  position: relative;
  overflow: hidden;
}

.welcome-robot::before {
  content: "";
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  border-radius: 50%;
  background: radial-gradient(
    circle at center,
    rgba(255, 255, 255, 0.12),
    transparent 70%
  );
  z-index: -1;
}

.slime-body-group {
  transform-origin: 50% 50%;
  animation: liquid-wobble 2s infinite cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

.slime-body-shape {
  fill: dodgerblue;
  opacity: 0.9;
}

.slime-face {
  animation: face-bob 2s infinite cubic-bezier(0.45, 0.05, 0.55, 0.95);
}

.eye {
  fill: #222;
  transform-origin: 50% 50%;
  animation: blink 3s infinite ease-in-out;
}

.mouth {
  fill: none;
  stroke: #222;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Click-triggered interactions */
/* Remove click-specific blink/laugh modifiers to restore original idle animations */
/* Theme-driven face colors (eyes and mouth) */
.eye,
.eye-closed,
.mouth,
.mouth-laugh {
  stroke: #222;
  fill: none;
}
.eye {
  fill: #222;
  stroke: none;
}
.eye-closed {
  stroke-width: 2;
}
.mouth,
.mouth-laugh {
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Default state: open eyes and neutral mouth visible */
.eye-closed {
  display: none;
}
.mouth-laugh {
  display: none;
}

/* Liquid Animation Keyframes - More natural and fluid */
@keyframes liquid-wobble {
  0%,
  100% {
    transform: scale(1, 1) translateY(0) rotate(0deg);
  }
  25% {
    transform: scale(1.05, 0.95) translateY(2px) rotate(1deg);
  }
  50% {
    transform: scale(0.98, 1.02) translateY(-1px) rotate(-1deg);
  }
  75% {
    transform: scale(1.02, 0.98) translateY(1px) rotate(0.5deg);
  }
}

@keyframes face-bob {
  0%,
  100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(1.5px) translateX(0.3px);
  }
  60% {
    transform: translateY(-1px) translateX(-0.3px);
  }
  80% {
    transform: translateY(0.8px) translateX(0.2px);
  }
}

@keyframes blink {
  0%,
  95%,
  100% {
    transform: scaleY(1);
  }
  97%,
  98% {
    transform: scaleY(0.1);
  }
}

/* Chain of Thought Accordion Styles */
.chain-of-thought-accordion {
  margin: var(--spacing-md) 0;
  border: none;

  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-secondary);
}

.accordion-toggle {
  width: 100%;
  padding: var(--spacing-md);
  background: var(--bg-tertiary);
  border: none;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: var(--spacing-sm);
  color: var(--text-primary);
  font-weight: bold;
  font-size: 16px;
  transition: background-color 0.2s ease;
}

.accordion-toggle:hover {
  background: var(--bg-secondary);
}

.accordion-toggle .fa-brain {
  color: var(--accent-color);
}

.accordion-icon {
  margin-left: auto;
  transition: transform 0.3s ease;
}

.accordion-toggle.active .accordion-icon {
  transform: rotate(180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}

.accordion-content.active {
  max-height: 2000px;
  transition: max-height 0.4s ease-in;
}

.accordion-inner {
  padding: var(--spacing-md);
  color: var(--text-secondary);
  font-size: 16px;
  line-height: normal;
}

.accordion-inner p {
  margin: var(--spacing-sm) 0;
}

.accordion-inner code {
  background: var(--bg-primary);
  padding: var(--spacing-xs) var(--spacing-xs);
  border-radius: 3px;
  font-size: 16px;
}
.cs_avatar_container_complex {
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    radial-gradient(
      ellipse at 30% 20%,
      rgba(135, 206, 250, 0.8) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 70% 80%,
      rgba(100, 149, 237, 0.6) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 50% 50%,
      rgba(173, 216, 230, 0.4) 0%,
      transparent 70%
    ),
    linear-gradient(
      135deg,
      rgba(176, 224, 230, 0.9) 0%,
      rgba(135, 206, 250, 0.7) 50%,
      rgba(100, 149, 237, 0.8) 100%
    );
  border-radius: 50%;
  position: relative;
  overflow: hidden;
  animation:
    cs_robot_float 4s ease-in-out infinite,
    cs_liquid_pulse 3s ease-in-out infinite;
  margin: 0 auto;
}
.cs_avatar_container_complex::before {
  content: "";
  position: absolute;
  top: -100%;
  left: -100%;
  width: 300%;
  height: 300%;
  background:
    radial-gradient(
      circle at 20% 30%,
      rgba(255, 255, 255, 0.3) 2%,
      transparent 4%
    ),
    radial-gradient(
      circle at 80% 70%,
      rgba(255, 255, 255, 0.2) 1%,
      transparent 3%
    ),
    radial-gradient(
      circle at 40% 80%,
      rgba(255, 255, 255, 0.25) 1.5%,
      transparent 3.5%
    ),
    linear-gradient(
      45deg,
      transparent 30%,
      rgba(255, 255, 255, 0.1) 50%,
      transparent 70%
    );
  animation:
    cs_liquid_flow 8s linear infinite,
    cs_bubble_float 6s ease-in-out infinite;
  border-radius: 50%;
}
.cs_avatar_container_complex::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(
      ellipse at 60% 40%,
      rgba(255, 255, 255, 0.4) 0%,
      transparent 30%
    ),
    radial-gradient(
      ellipse at 20% 70%,
      rgba(255, 255, 255, 0.3) 0%,
      transparent 25%
    );
  border-radius: 50%;
  animation: cs_liquid_ripple 4s ease-in-out infinite;
  mix-blend-mode: overlay;
}
.cs_slime_avatar {
  width: 80%;
  height: 80%;
}
.cs_slime_body_group {
  transform-origin: 50% 50%;
  animation: cs_liquid_wobble 2s infinite cubic-bezier(0.45, 0.05, 0.55, 0.95);
}
.cs_slime_body_shape {
  fill: url(#cs_avatar_body_gradient);
  opacity: 0.95;
}
.cs_slime_face {
  animation: cs_face_bob 2s infinite cubic-bezier(0.45, 0.05, 0.55, 0.95);
}
.cs_eye {
  fill: #000000;
  transform-origin: 50% 50%;
  animation: cs_infant_blink 3s infinite ease-in-out;
}
.cs_eye_closed {
  stroke: #000000;
  fill: none;
  stroke-width: 3;
  display: none;
}
.cs_mouth {
  fill: none;
  stroke: #222222;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.cs_mouth_laugh {
  stroke: #222222;
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  stroke-linejoin: round;
  display: none;
}
@keyframes cs_robot_float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-8px);
  }
}
@keyframes cs_robot_look_around {
  0%,
  20% {
    transform: rotate(0deg);
  }
  25%,
  35% {
    transform: rotate(-15deg);
  }
  40%,
  60% {
    transform: rotate(0deg);
  }
  65%,
  75% {
    transform: rotate(15deg);
  }
  80%,
  100% {
    transform: rotate(0deg);
  }
}
@keyframes cs_liquid_pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}
@keyframes cs_liquid_flow {
  0% {
    transform: translateX(-100%) translateY(-100%) rotate(0deg);
  }
  25% {
    transform: translateX(-50%) translateY(-50%) rotate(90deg);
  }
  50% {
    transform: translateX(0%) translateY(0%) rotate(180deg);
  }
  75% {
    transform: translateX(50%) translateY(50%) rotate(270deg);
  }
  100% {
    transform: translateX(100%) translateY(100%) rotate(360deg);
  }
}
@keyframes cs_bubble_float {
  0%,
  100% {
    opacity: 0.6;
    transform: translateY(0px) scale(1);
  }
  25% {
    opacity: 0.8;
    transform: translateY(-10px) scale(1.1);
  }
  50% {
    opacity: 0.9;
    transform: translateY(-20px) scale(1.15);
  }
  75% {
    opacity: 0.7;
    transform: translateY(-15px) scale(1.05);
  }
}
@keyframes cs_liquid_ripple {
  0%,
  100% {
    transform: scale(1) rotate(0deg);
    opacity: 0.3;
  }
  25% {
    transform: scale(1.1) rotate(90deg);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.2) rotate(180deg);
    opacity: 0.6;
  }
  75% {
    transform: scale(1.05) rotate(270deg);
    opacity: 0.4;
  }
}
@keyframes cs_liquid_distortion {
  0%,
  100% {
    transform: skew(0deg, 0deg) scale(1);
  }
  25% {
    transform: skew(1deg, -0.5deg) scale(1.02);
  }
  50% {
    transform: skew(0deg, 0deg) scale(1);
  }
  75% {
    transform: skew(-1deg, 0.5deg) scale(1.01);
  }
}
@keyframes cs_liquid_eye_float {
  0%,
  100% {
    transform: translateY(0px) scale(1);
  }
  50% {
    transform: translateY(-2px) scale(1.1);
  }
}
@keyframes cs_eyeball_blink {
  0%,
  90%,
  100% {
    opacity: 1;
    transform: scaleY(1);
  }
  95% {
    opacity: 0.8;
    transform: scaleY(0.1);
  }
}
@keyframes cs_liquid_wobble {
  0%,
  100% {
    transform: scale(1, 1) translateY(0) rotate(0deg);
  }
  25% {
    transform: scale(1.05, 0.95) translateY(2px) rotate(1deg);
  }
  50% {
    transform: scale(0.98, 1.02) translateY(-1px) rotate(-1deg);
  }
  75% {
    transform: scale(1.02, 0.98) translateY(1px) rotate(0.5deg);
  }
}
@keyframes cs_face_bob {
  0%,
  100% {
    transform: translateY(0);
  }
  30% {
    transform: translateY(1.5px) translateX(0.3px);
  }
  60% {
    transform: translateY(-1px) translateX(-0.3px);
  }
  80% {
    transform: translateY(0.8px) translateX(0.2px);
  }
}
@keyframes cs_infant_blink {
  0%,
  95%,
  100% {
    transform: scaleY(1);
  }
  97%,
  98% {
    transform: scaleY(0.1);
  }
}
@keyframes cs_infant_mouth {
  0%,
  92%,
  100% {
    d: path("M 46,70 L 54,70");
  }
  96% {
    d: path("M 46,70 Q 50,72 54,70");
  }
}

/* ============================================
   COMPREHENSIVE DARK THEME STYLES
   Ensuring proper contrast hierarchy
   ============================================ */

/* Sidebar dark theme styles */
[data-theme="dark"] .sidebar {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .sidebar-header {
  background-color: var(--bg-tertiary);
}

[data-theme="dark"] .sidebar-close-btn,
[data-theme="dark"] .sidebar-search-toggle-btn {
  background-color: transparent;
  color: var(--text-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .sidebar-close-btn:hover,
[data-theme="dark"] .sidebar-search-toggle-btn:hover {
  background-color: transparent;
  color: var(--accent-color);
  border-color: var(--accent-color);
}

[data-theme="dark"] .sidebar-search-toggle-btn.active {
  background-color: var(--accent-color);
  color: var(--text-on-accent);
}

[data-theme="dark"] .sidebar-search-toggle-btn.active:hover {
  background-color: var(--accent-hover);
  color: var(--text-on-accent);
}

[data-theme="dark"] .sidebar-new-chat-btn {
  background-color: var(--accent-color);
  color: var(--text-on-accent);
}

[data-theme="dark"] .conversation-item:hover {
  background-color: var(--bg-hover);
}

[data-theme="dark"] .conversation-item.active {
  border-color: var(--text-primary);
}

[data-theme="dark"] .search-box input {
  background: var(--bg-tertiary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .search-box input:focus {
  background-color: var(--bg-primary);
  border-color: var(--border-color);
}

/* Settings panel dark theme styles */
[data-theme="dark"] .settings-panel {
  background: var(--bg-secondary);
}

[data-theme="dark"] .settings-header {
  background: var(--bg-tertiary);
}

[data-theme="dark"] .settings-content {
  background: var(--bg-primary);
}

[data-theme="dark"] .settings-close-btn {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

[data-theme="dark"] .settings-close-btn:hover {
  background-color: var(--bg-hover);
}

[data-theme="dark"] .config-group {
  background: var(--bg-tertiary);
}

[data-theme="dark"] .group-header {
  background-color: var(--bg-primary);
}

/* Form controls dark theme */
[data-theme="dark"] .form-control,
[data-theme="dark"] .prompt-input,
[data-theme="dark"] input[type="text"],
[data-theme="dark"] input[type="number"],
[data-theme="dark"] textarea,
[data-theme="dark"] select {
  background-color: var(--bg-tertiary);
  border-color: var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus,
[data-theme="dark"] .prompt-input:focus,
[data-theme="dark"] input[type="text"]:focus,
[data-theme="dark"] input[type="number"]:focus,
[data-theme="dark"] textarea:focus,
[data-theme="dark"] select:focus {
  background-color: var(--bg-primary);
  border-color: var(--border-color);
}

/* Buttons dark theme */
[data-theme="dark"] .btn-primary,
[data-theme="dark"] .btn-send {
  background-color: var(--accent-color);
  color: var(--text-on-accent);
}

[data-theme="dark"] .btn-secondary,
[data-theme="dark"] .btn-small {
  background-color: var(--bg-tertiary);
  color: var(--text-primary);
}

[data-theme="dark"] .btn-secondary:hover,
[data-theme="dark"] .btn-small:hover {
  background-color: var(--bg-hover);
}

[data-theme="dark"] .btn-delete,
[data-theme="dark"] .btn-delete-small {
  background-color: var(--bg-secondary);
  color: var(--danger-color);
}

[data-theme="dark"] .btn-delete:hover,
[data-theme="dark"] .btn-delete-small:hover {
  background-color: var(--danger-color);
  color: var(--text-primary);
}

/* Toggle buttons dark theme */
[data-theme="dark"] .settings-toggle-btn,
[data-theme="dark"] .theme-toggle {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
}

[data-theme="dark"] .settings-toggle-btn:hover,
[data-theme="dark"] .theme-toggle:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

[data-theme="dark"] .sidebar-toggle-btn {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}

[data-theme="dark"] .sidebar-toggle-btn:hover {
  color: var(--accent-color);
}

/* Chat menu dark theme */
[data-theme="dark"] .chat-menu-btn {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-secondary);
}

[data-theme="dark"] .chat-menu-btn:hover {
  color: var(--accent-color);
  border-color: var(--accent-color);
}

[data-theme="dark"] .chat-menu-popup {
  background-color: var(--bg-secondary);
  border-color: var(--border-color);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .chat-menu-item {
  color: var(--text-primary);
}

[data-theme="dark"] .chat-menu-item:hover {
  background-color: var(--bg-hover);
}

[data-theme="dark"] .chat-menu-item i {
  color: var(--text-secondary);
}

[data-theme="dark"] .chat-menu-item-danger {
  color: var(--error-color);
}

[data-theme="dark"] .chat-menu-item-danger:hover {
  background-color: rgba(239, 68, 68, 0.15);
}

/* RAG, Web Search, Browser toggle buttons dark theme */

/* Messages dark theme */
[data-theme="dark"] .message.user .message-content {
  background: var(--message-user-bg);
  color: var(--message-user-text);
}

[data-theme="dark"] .message.assistant .message-content {
  background: var(--message-assistant-bg);
  border-color: var(--border-color);
  color: var(--message-assistant-text);
}

/* Navbar dark theme */
[data-theme="dark"] .top-navbar {
  background-color: var(--bg-primary);
}

[data-theme="dark"] .navbar-link {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

[data-theme="dark"] .navbar-link:hover {
  background-color: var(--bg-hover);
}

/* Chat header dark theme */
[data-theme="dark"] .chat-header {
  background: linear-gradient(
    to bottom,
    var(--bg-primary) 0%,
    var(--bg-primary) 60%,
    rgba(15, 15, 15, 0) 100%
  );
  border-bottom-color: var(--border-color);
}

/* Welcome message dark theme */
[data-theme="dark"] .welcome-message {
  background: var(--bg-welcome);
  border-color: var(--border-color);
}

/* Welcome waterbot icon dark theme - filled instead of stroked */
[data-theme="dark"] .welcome-message .waterbot-icon-welcome .waterbot-body {
  fill: var(--accent-color);
  stroke: var(--accent-color);
}

[data-theme="dark"] .welcome-message .waterbot-icon-welcome .waterbot-eye {
  fill: var(--bg-welcome);
}

[data-theme="dark"] .welcome-message .waterbot-icon-welcome .waterbot-smile {
  stroke: var(--bg-welcome);
}

/* Discussion starters dark theme */
[data-theme="dark"] .discussion-starter {
  background: var(--bg-tertiary);
}

[data-theme="dark"] .discussion-starter:hover {
  background-color: var(--bg-hover);
}

/* Code blocks dark theme */
[data-theme="dark"] .code-block-header {
  background-color: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .code-block pre {
  background-color: transparent;
}

[data-theme="dark"] .copy-code-button {
  background-color: var(--bg-secondary);
  color: var(--text-secondary);
}

[data-theme="dark"] .copy-code-button:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

/* Attachments dark theme */
[data-theme="dark"] .attachment-item {
  background-color: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .attachment-thumbnail {
  background-color: var(--bg-tertiary);
}

/* Upload preview dark theme */
[data-theme="dark"] .upload-preview {
  background: rgba(30, 30, 30, 0.8);
}

[data-theme="dark"] .attachment-chip {
  background: #2a2a2a;
  border-color: #3a3a3a;
}

[data-theme="dark"] .attachment-chip:hover {
  border-color: var(--accent-color);
}

[data-theme="dark"] .attachment-chip-header {
  background: #333;
}

[data-theme="dark"] .attachment-type-label {
  color: var(--text-tertiary);
  background: var(--bg-tertiary);
}

[data-theme="dark"] .attachment-code {
  color: var(--text-secondary);
}

/* Upload area dark theme */
[data-theme="dark"] .upload-area {
  background-color: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-theme="dark"] .upload-area:hover,
[data-theme="dark"] .upload-area.dragover {
  background-color: var(--bg-hover);
  border-color: var(--accent-color);
}

/* Input area dark theme */
[data-theme="dark"] .input-area {
  background: rgba(15, 15, 15, 0.9);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* Chat header dark theme gradient - merged with main dark header rule above */

/* Confirmation dialog dark theme */
[data-theme="dark"] .confirm-dialog {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
}

[data-theme="dark"] .confirm-dialog-btn.cancel {
  background-color: var(--bg-tertiary);
}

/* Message menu popup dark theme */
[data-theme="dark"] .message-menu-popup {
  background-color: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .input-area-container {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .input-wrapper {
  background-color: var(--bg-tertiary);
  border-color: var(--border-color);
}

[data-theme="dark"] .input-wrapper:focus-within {
  border-color: var(--accent-color);
}

[data-theme="dark"] #messageInput {
  background-color: transparent;
  color: var(--text-primary);
}

/* Contenteditable div dark theme styles */
[data-theme="dark"] .contenteditable-div:empty::before {
  color: var(--text-tertiary);
  opacity: 0.8;
}

/* Dark theme autofill/autocomplete highlight removal */
[data-theme="dark"] input:-webkit-autofill,
[data-theme="dark"] input:-webkit-autofill:hover,
[data-theme="dark"] input:-webkit-autofill:focus,
[data-theme="dark"] input:-webkit-autofill:active,
[data-theme="dark"] textarea:-webkit-autofill,
[data-theme="dark"] textarea:-webkit-autofill:hover,
[data-theme="dark"] textarea:-webkit-autofill:focus,
[data-theme="dark"] textarea:-webkit-autofill:active,
[data-theme="dark"] select:-webkit-autofill,
[data-theme="dark"] select:-webkit-autofill:hover,
[data-theme="dark"] select:-webkit-autofill:focus,
[data-theme="dark"] select:-webkit-autofill:active {
  -webkit-text-fill-color: var(--text-primary) !important;
  caret-color: var(--text-primary);
  transition: background-color 5000s ease-in-out 0s;
}

/* Scrollbar dark theme - subtle light grey */
[data-theme="dark"] ::-webkit-scrollbar-track {
  background: transparent;
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
  background-color: rgba(120, 120, 120, 0.4);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
  background-color: rgba(140, 140, 140, 0.6);
}

/* Panel sections dark theme */
[data-theme="dark"] .panel-section {
  background: var(--bg-secondary);
}

[data-theme="dark"] .section-header {
  background-color: var(--bg-secondary);
}

/* Document items dark theme */
[data-theme="dark"] .document-item {
  background-color: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .document-item:hover {
  background-color: var(--bg-tertiary);
}

/* Tags dark theme */
[data-theme="dark"] .tag-container {
  background-color: var(--bg-primary);
  color: var(--text-secondary);
}

[data-theme="dark"] .document-tag {
  background-color: var(--accent-light);
  color: var(--accent-color);
}

/* Accordion dark theme */
[data-theme="dark"] .accordion-header {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .accordion-header:hover {
  background-color: var(--bg-tertiary);
}

[data-theme="dark"] .accordion-content {
  background-color: var(--bg-primary);
}

/* Message actions dark theme - visible borders */
[data-theme="dark"] .message-actions button {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
}

[data-theme="dark"] .message-actions button:hover {
  background-color: var(--bg-hover);
  border-color: var(--accent-color);
  color: var(--accent-color);
}

/* Message avatar dark theme - better visibility */
[data-theme="dark"] .message-avatar {
  background-color: var(--bg-tertiary);
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

[data-theme="dark"] .message-avatar .waterbot-icon {
  color: var(--accent-color);
}

[data-theme="dark"] .message.assistant .message-avatar {
  background-color: var(--bg-secondary);
  border-color: var(--border-color);
}

/* Dark mode: invert waterbot icon to be filled instead of stroked */
[data-theme="dark"] .message.assistant .message-avatar .waterbot-icon {
  color: var(--accent-color);
}

/* Dark mode: fill the body with accent color */
[data-theme="dark"]
  .message.assistant
  .message-avatar
  .waterbot-icon
  .waterbot-body {
  fill: var(--accent-color);
  stroke: var(--accent-color);
}

/* Dark mode: make eyes and smile contrast with background color */
[data-theme="dark"]
  .message.assistant
  .message-avatar
  .waterbot-icon
  .waterbot-eye {
  fill: var(--bg-secondary);
}

[data-theme="dark"]
  .message.assistant
  .message-avatar
  .waterbot-icon
  .waterbot-smile {
  stroke: var(--bg-secondary);
}

/* Dark mode loading avatar glow - removed */

[data-theme="dark"]
  .message.assistant
  .message-avatar.loading
  .waterbot-icon
  .waterbot-body {
  fill: var(--accent-color);
  stroke: var(--accent-color);
}

[data-theme="dark"]
  .message.assistant
  .message-avatar.loading
  .waterbot-icon
  .waterbot-eye {
  fill: var(--bg-secondary);
}

[data-theme="dark"]
  .message.assistant
  .message-avatar.loading
  .waterbot-icon
  .waterbot-smile {
  stroke: var(--bg-secondary);
}

[data-theme="dark"] .message.user .message-avatar {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
  color: var(--text-on-accent);
}

[data-theme="dark"] .message.user .message-content .message-avatar {
  background-color: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Confirm dialog dark theme */
[data-theme="dark"] .confirm-action-cancel {
  background-color: var(--bg-secondary);
  color: var(--text-primary);
}

[data-theme="dark"] .confirm-action-cancel:hover {
  background-color: var(--bg-hover);
}

/* Tooltips dark theme */

/* Range slider dark theme */
[data-theme="dark"] .range-control {
  background: var(--bg-secondary);
}

[data-theme="dark"] input[type="range"] {
  background: var(--bg-tertiary);
}

[data-theme="dark"] input[type="range"]::-webkit-slider-thumb {
  background: var(--accent-color);
}

/* Context warning dark theme */
[data-theme="dark"] .context-warning {
  background: var(--warning-color);
  color: var(--text-primary);
}

/* Browser panel dark theme */
[data-theme="dark"] .browser-panel {
  background-color: var(--bg-secondary);
}

[data-theme="dark"] .browser-header {
  background-color: var(--bg-tertiary);
}

[data-theme="dark"] .browser-loading {
  background-color: var(--bg-tertiary);
}

/* Chat form dark theme */
[data-theme="dark"] #chatForm {
  background: var(--bg-form);
  border-color: var(--border-color);
}

[data-theme="dark"] #chatForm:focus-within {
  border-color: var(--accent-color);
}

[data-theme="dark"] .chat-input-wrapper {
  background: var(--bg-chat-content);
  border-color: var(--border-color);
}

[data-theme="dark"] .chat-input-wrapper:focus-within {
  border-color: var(--accent-color);
}

/* Chat header container dark theme */
[data-theme="dark"] .chat-header-container {
  background-color: var(--bg-chat-content);
  border-color: var(--border-color);
}

/* Chat content wrapper dark theme */
[data-theme="dark"] .chat-content-wrapper {
  background-color: transparent;
}

/* Drag over dark theme */
[data-theme="dark"] .chat-content-wrapper.drag-over {
  background-color: rgba(59, 139, 255, 0.1);
}

[data-theme="dark"] .chat-content-wrapper.drag-over::after {
  background: var(--bg-secondary);
  color: var(--accent-color);
}

/* Image Modal */
.image-modal {
  display: none;
  position: fixed;
  z-index: 2000;
  padding-top: 50px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: rgba(0, 0, 0, 0.9);
}

.image-modal-content {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 1200px;
  max-height: 90vh;
  object-fit: contain;
  animation: zoomIn 0.3s;
}

@keyframes zoomIn {
  from {
    transform: scale(0);
  }
  to {
    transform: scale(1);
  }
}

.image-modal-close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: var(--text-on-dark);
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
  cursor: pointer;
}

.image-modal-close:hover,
.image-modal-close:focus {
  color: var(--text-secondary);
  text-decoration: none;
  cursor: pointer;
}

/* Message Thumbnails */
.message-thumbnail {
  max-width: 150px;
  max-height: 150px;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s;
  border: 1px solid var(--border-color);
  margin: 8px 0;
  display: block;
}

.message-thumbnail:hover {
  transform: scale(1.05);
  opacity: 0.9;
}

.message-attachment-image img {
  max-width: 150px;
  max-height: 150px;
  border-radius: 8px;
  cursor: pointer;
  border: 1px solid var(--border-color);
  transition: transform 0.2s;
}

.message-attachment-image img:hover {
  transform: scale(1.05);
}

/* Reposition More Button to Top Right - REMOVED */
.message-content {
  position: relative;
}

/* Adjust popup position */
.message-content .message-menu-popup {
  top: 100%;
  right: 0;
  margin-top: 4px;
  z-index: 100;
}

/* Browser Modal Responsive Styles */
@media (max-width: 768px) {
  .browser-modal-content {
    width: calc(100vw - 32px);
    height: calc(100vh - 32px);
  }

  .browser-controls {
    flex-wrap: wrap;
  }

  .browser-url-bar {
    min-width: 150px;
  }

  .browser-a11y-panel {
    width: 50%;
    min-width: 250px;
  }
}

@media (max-width: 480px) {
  .browser-modal-content {
    width: calc(100vw - 32px);
    height: calc(100vh - 32px);
    border-radius: 0;
  }

  .browser-modal-header {
    flex-direction: column;
    align-items: stretch;
    gap: var(--spacing-xs);
  }

  .browser-modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    z-index: 10;
  }

  .browser-a11y-panel {
    width: 100%;
    min-width: 100%;
  }

  .browser-url-display {
    font-size: 12px;
    padding: var(--spacing-xs) var(--spacing-sm);
  }
}

/* Dark theme for browser modal */
[data-theme="dark"] .browser-modal-backdrop {
  background: rgba(0, 0, 0, 0.85);
}

[data-theme="dark"] .browser-modal-content {
  background-color: var(--bg-primary);
  border-color: var(--border-color);
}

[data-theme="dark"] .browser-modal-header {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .browser-url-display {
  background: var(--bg-secondary);
  border-color: var(--border-color);
  color: var(--text-secondary);
}

[data-theme="dark"] .browser-a11y-panel {
  background: var(--bg-primary);
  border-color: var(--border-color);
}

[data-theme="dark"] .browser-a11y-header {
  background: var(--bg-secondary);
  border-color: var(--border-color);
}

[data-theme="dark"] .browser-a11y-content {
  background: var(--bg-primary);
  color: var(--text-primary);
}