@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('styles/modal.css');

/* ============================================
   PREMIUM GLASSMORPHISM DESIGN SYSTEM
   ============================================ */

:root {
  /* Core Brand Colors - Unified Palette */
  --brand-primary: #6366f1;
  --brand-primary-light: #818cf8;
  --brand-primary-dark: #4f46e5;
  --brand-accent: #ec4899;
  --brand-accent-light: #f472b6;
  --brand-success: #10b981;
  --brand-warning: #f59e0b;
  --brand-error: #ef4444;

  /* Light Theme Colors */
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;

  /* Premium Glassmorphism Surfaces */
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-elevated: rgba(255, 255, 255, 0.85);
  --glass-overlay: rgba(255, 255, 255, 0.95);
  --glass-subtle: rgba(255, 255, 255, 0.5);

  /* Refined Backgrounds */
  --bg-primary: #fafbfc;
  --bg-secondary: #f1f5f9;
  --bg-gradient: radial-gradient(ellipse at top right, rgba(139, 92, 246, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(236, 72, 153, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at top left, rgba(59, 130, 246, 0.06) 0%, transparent 50%),
    linear-gradient(to bottom, #fafbfc, #f8fafc);

  /* Border System */
  --border-subtle: rgba(100, 116, 139, 0.1);
  --border-default: rgba(100, 116, 139, 0.15);
  --border-strong: rgba(100, 116, 139, 0.25);
  --border-accent: rgba(99, 102, 241, 0.3);

  /* Shadow System - Premium Depth */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 4px -1px rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.1), 0 4px 6px -4px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.16);

  /* Glass Shadow System */
  --shadow-glass-sm: 0 2px 8px rgba(15, 23, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  --shadow-glass-md: 0 8px 16px rgba(15, 23, 42, 0.08),
    0 2px 4px rgba(15, 23, 42, 0.04),
    inset 0 1px 0 rgba(255, 255, 255, 0.5);
  --shadow-glass-lg: 0 12px 24px rgba(15, 23, 42, 0.1),
    0 4px 8px rgba(15, 23, 42, 0.06),
    inset 0 1px 0 rgba(255, 255, 255, 0.6);
  --shadow-glass-xl: 0 20px 40px rgba(15, 23, 42, 0.12),
    0 8px 16px rgba(15, 23, 42, 0.08),
    inset 0 1px 0 rgba(255, 255, 255, 0.7);

  /* Blur System */
  --blur-subtle: 8px;
  --blur-default: 16px;
  --blur-strong: 24px;
  --blur-extreme: 32px;

  /* Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* Component-Specific Variables */
  --input-bg: rgba(248, 250, 252, 0.8);
  --input-border: var(--border-default);
  --input-focus-border: var(--brand-primary);
  --input-text: var(--text-primary);
  --input-placeholder: var(--text-tertiary);

  --user-message-bg: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.08) 100%);
  --user-message-border: rgba(99, 102, 241, 0.2);
  --user-message-text: var(--text-primary);

  --ai-message-bg: var(--glass-bg);
  --ai-message-border: var(--border-subtle);
  --ai-message-text: var(--text-primary);

  --sidebar-bg: var(--glass-elevated);
  --sidebar-border: var(--border-default);

  --button-primary-bg: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-dark) 100%);
  --button-primary-hover: linear-gradient(135deg, var(--brand-primary-light) 0%, var(--brand-primary) 100%);
  --button-primary-text: #ffffff;

  --scrollbar-thumb: rgba(100, 116, 139, 0.3);
  --scrollbar-track: transparent;

  --focus-ring: 0 0 0 3px rgba(99, 102, 241, 0.15);
  --focus-ring-error: 0 0 0 3px rgba(239, 68, 68, 0.15);
}

/* Dark Theme - Premium Night Mode */
.dark-theme {
  /* Dark Brand Colors */
  --brand-primary: #818cf8;
  --brand-primary-light: #a5b4fc;
  --brand-primary-dark: #6366f1;
  --brand-accent: #f472b6;
  --brand-accent-light: #f9a8d4;

  /* Dark Theme Text */
  --text-primary: #f1f5f9;
  --text-secondary: #cbd5e1;
  --text-tertiary: #64748b;

  /* Dark Glassmorphism Surfaces */
  --glass-bg: rgba(15, 23, 42, 0.7);
  --glass-elevated: rgba(30, 41, 59, 0.8);
  --glass-overlay: rgba(15, 23, 42, 0.95);
  --glass-subtle: rgba(51, 65, 85, 0.5);

  /* Dark Backgrounds */
  --bg-primary: #0f172a;
  --bg-secondary: #1e293b;
  --bg-gradient: radial-gradient(ellipse at top right, rgba(129, 140, 248, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at bottom left, rgba(244, 114, 182, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at top left, rgba(96, 165, 250, 0.08) 0%, transparent 50%),
    linear-gradient(to bottom, #0f172a, #020617);

  /* Dark Borders */
  --border-subtle: rgba(148, 163, 184, 0.08);
  --border-default: rgba(148, 163, 184, 0.12);
  --border-strong: rgba(148, 163, 184, 0.2);
  --border-accent: rgba(129, 140, 248, 0.25);

  /* Dark Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.15);
  --shadow-sm: 0 2px 4px -1px rgba(0, 0, 0, 0.2), 0 1px 2px -1px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.25), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.35), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.5);

  /* Dark Glass Shadows */
  --shadow-glass-sm: 0 2px 8px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(148, 163, 184, 0.08);
  --shadow-glass-md: 0 8px 16px rgba(0, 0, 0, 0.3),
    0 2px 4px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(148, 163, 184, 0.1);
  --shadow-glass-lg: 0 12px 24px rgba(0, 0, 0, 0.4),
    0 4px 8px rgba(0, 0, 0, 0.25),
    inset 0 1px 0 rgba(148, 163, 184, 0.12);
  --shadow-glass-xl: 0 20px 40px rgba(0, 0, 0, 0.5),
    0 8px 16px rgba(0, 0, 0, 0.35),
    inset 0 1px 0 rgba(148, 163, 184, 0.15);

  /* Dark Component Variables */
  --input-bg: rgba(30, 41, 59, 0.6);
  --input-border: var(--border-default);
  --input-focus-border: var(--brand-primary);
  --input-text: var(--text-primary);
  --input-placeholder: var(--text-tertiary);

  --user-message-bg: linear-gradient(135deg, rgba(129, 140, 248, 0.18) 0%, rgba(167, 139, 250, 0.12) 100%);
  --user-message-border: rgba(129, 140, 248, 0.25);

  --ai-message-bg: var(--glass-bg);
  --ai-message-border: var(--border-subtle);

  --sidebar-bg: var(--glass-elevated);
  --sidebar-border: var(--border-default);

  --scrollbar-thumb: rgba(148, 163, 184, 0.3);

  --focus-ring: 0 0 0 3px rgba(129, 140, 248, 0.2);
}

/* ============================================
   BASE STYLES & RESET
   ============================================ */

*,
*::before,
*::after {
  box-sizing: border-box;
}

body,
html {
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-gradient);
  background-color: var(--bg-primary);
  background-attachment: fixed;
  height: 100%;
  overflow: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Animated Background Gradient */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background: var(--bg-gradient);
  animation: gradientShift 20s ease infinite;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  pointer-events: none;
}

@keyframes gradientShift {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.95;
  }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   LAYOUT
   ============================================ */

.app-container {
  display: flex;
  height: 100vh;
  position: relative;
  overflow: hidden;
  background: transparent;
}

/* ============================================
   LOGO
   ============================================ */

.top-left-logo {
  position: fixed;
  top: 12px;
  left: 60px;
  z-index: 999;
  transition: left var(--transition-base), opacity var(--transition-base);
  opacity: 0.95;
}

.top-left-logo:hover {
  opacity: 1;
}

.top-left-logo.sidebar-open {
  left: 320px;
}

.logo-container {
  height: 42px;
  width: auto;
  filter: drop-shadow(0 2px 8px rgba(15, 23, 42, 0.08));
  transition: all var(--transition-base);
}

.logo-container:hover {
  filter: drop-shadow(0 4px 12px rgba(99, 102, 241, 0.15));
  transform: scale(1.02);
}

.logo-container svg {
  height: 100%;
  width: auto;
}

/* ============================================
   SIDEBAR - Premium Glass Panel
   ============================================ */

.sidebar {
  width: 280px;
  height: 100vh;
  position: fixed;
  left: -280px;
  top: 0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding: var(--space-xl);
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  box-shadow: var(--shadow-glass-xl), 4px 0 20px rgba(15, 23, 42, 0.08);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  transition: left var(--transition-base);
  overflow: hidden;
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg,
      transparent 0%,
      rgba(99, 102, 241, 0.3) 50%,
      transparent 100%);
}

.sidebar.show {
  left: 0;
}

.sidebar h2 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-lg) 0;
  letter-spacing: -0.01em;
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--border-subtle);
}

#saved-chats-list {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  margin: 0 calc(-1 * var(--space-md));
  padding: 0 var(--space-md);
  list-style: none;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

#saved-chats-list::-webkit-scrollbar {
  width: 6px;
}

#saved-chats-list::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

#saved-chats-list::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
  transition: background var(--transition-fast);
}

#saved-chats-list::-webkit-scrollbar-thumb:hover {
  background: var(--brand-primary);
}

#saved-chats-list li {
  position: relative;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--glass-subtle);
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.875rem;
  color: var(--text-secondary);
  overflow: visible; /* Allow buttons to overflow */
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: space-between; /* Space between title and actions */
  min-height: 40px;
  gap: var(--space-sm);
}

#saved-chats-list li span {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#saved-chats-list li::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

#saved-chats-list li:hover {
  background: var(--glass-bg);
  border-color: var(--border-accent);
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#saved-chats-list li:hover::before {
  opacity: 0.05;
}

#saved-chats-list li.selected {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.08) 100%);
  border-color: var(--border-accent);
  color: var(--text-primary);
  font-weight: 500;
}

/* Saved Chat Action Buttons */
.chat-actions {
  display: flex;
  gap: var(--space-xs);
  align-items: center;
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: 2;
}

#saved-chats-list li:hover .chat-actions {
  opacity: 1;
}

.chat-actions button {
  padding: var(--space-xs);
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: all var(--transition-fast);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chat-actions button:hover {
  background: var(--glass-subtle);
  color: var(--brand-primary);
  transform: scale(1.1);
}

.chat-actions button i {
  font-size: 0.875rem;
  pointer-events: none;
}

.sidebar-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border-subtle);
  margin-top: var(--space-lg);
}

.sidebar-actions button {
  padding: var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

#new-chat-button {
  background: var(--button-primary-bg);
  color: var(--button-primary-text);
  box-shadow: var(--shadow-md), 0 0 0 1px rgba(255, 255, 255, 0.1) inset;
}

#new-chat-button:hover {
  background: var(--button-primary-hover);
  box-shadow: var(--shadow-lg), 0 0 0 1px rgba(255, 255, 255, 0.15) inset;
  transform: translateY(-2px);
}

#new-chat-button:active {
  transform: translateY(0);
}

#clear-saved-chats-button {
  background: rgba(239, 68, 68, 0.1);
  color: var(--brand-error);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

#clear-saved-chats-button:hover {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  box-shadow: var(--shadow-sm);
}

/* Sidebar Toggle Button */
.toggle-sidebar-btn {
  position: fixed;
  left: 0;
  top: 10px;
  width: 40px;
  height: 40px;
  z-index: 1001;
  background: var(--glass-elevated);
  border: 1px solid var(--border-default);
  border-left: none;
  border-top-right-radius: var(--radius-xl);
  border-bottom-right-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-glass-md);
  backdrop-filter: blur(var(--blur-default));
  -webkit-backdrop-filter: blur(var(--blur-default));
  transition: all var(--transition-base);
}

.toggle-sidebar-btn:hover {
  background: var(--glass-overlay);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glass-lg);
  padding-right: 4px;
}

.toggle-sidebar-icon {
  width: 20px;
  height: 20px;
  background-color: var(--text-primary);
  mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="12" x2="21" y2="12"></line><polyline points="15 6 21 12 15 18"></polyline></svg>') center/contain no-repeat;
  -webkit-mask: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="12" x2="21" y2="12"></line><polyline points="15 6 21 12 15 18"></polyline></svg>') center/contain no-repeat;
  transition: all var(--transition-base);
}

.toggle-sidebar-btn.is-open .toggle-sidebar-icon {
  transform: rotate(180deg);
  background-color: var(--brand-primary);
}

.toggle-sidebar-btn.is-open {
  left: 280px;
}

/* ============================================
   MAIN CONTENT AREA
   ============================================ */

.main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  transition: margin-left var(--transition-base);
  padding-top: 70px;
  min-height: 0; /* Critical for flex children to scroll */
  overflow: hidden; /* Prevent content from overflowing */
}

.main-content.sidebar-open {
  margin-left: 280px;
}

/* ============================================
   TOP RIGHT CONTROLS - Premium Glass Buttons
   ============================================ */

.top-right-buttons {
  position: fixed;
  top: 12px;
  right: 20px;
  z-index: 999;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.icon-button {
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  color: var(--text-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-glass-sm);
  backdrop-filter: blur(var(--blur-default));
  -webkit-backdrop-filter: blur(var(--blur-default));
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.icon-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.icon-button:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glass-md), 0 0 20px rgba(99, 102, 241, 0.1);
  transform: translateY(-2px);
}

.icon-button:hover::before {
  opacity: 0.08;
}

.icon-button:active {
  transform: translateY(0);
}

.icon-button i {
  position: relative;
  z-index: 1;
  font-size: 1rem;
  transition: all var(--transition-fast);
}

.icon-button:hover i {
  color: var(--brand-primary);
  transform: scale(1.1);
}

/* Profile Button */
.profile-icon {
  border-radius: var(--radius-full);
  padding: 2px;
}

.profile-icon img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
}

/* Profile Dropdown */
.profile-menu {
  position: relative;
}

.profile-dropdown {
  position: absolute;
  top: calc(100% + var(--space-sm));
  right: 0;
  min-width: 220px;
  padding: var(--space-sm);
  background: var(--glass-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass-xl);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.95);
  transition: all var(--transition-base);
}

.profile-dropdown.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.profile-dropdown a {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.profile-dropdown a::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.profile-dropdown a:hover {
  color: var(--text-primary);
  background: var(--glass-subtle);
}

.profile-dropdown a:hover::before {
  opacity: 0.05;
}

.profile-dropdown a i {
  position: relative;
  z-index: 1;
  width: 18px;
  text-align: center;
  transition: all var(--transition-fast);
}

.profile-dropdown a:hover i {
  color: var(--brand-primary);
  transform: scale(1.1);
}

.profile-dropdown a span {
  position: relative;
  z-index: 1;
}

/* Model Selector - Premium Dropdown */
.model-selector {
  position: relative;
}

.model-selector__toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  height: 40px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  box-shadow: var(--shadow-glass-sm);
  backdrop-filter: blur(var(--blur-default));
  -webkit-backdrop-filter: blur(var(--blur-default));
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.model-selector__toggle:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glass-md);
  transform: translateY(-2px);
}

.model-selector__icon {
  font-size: 0.75rem;
  transition: transform var(--transition-fast);
}

.model-selector__toggle[aria-expanded="true"] .model-selector__icon {
  transform: rotate(180deg);
}

.model-selector__list-wrapper {
  position: absolute;
  top: calc(100% + var(--space-sm));
  right: 0;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px) scale(0.95);
  transition: all var(--transition-base);
}

.model-selector__list-wrapper.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.model-selector__list {
  min-width: 260px;
  padding: var(--space-sm);
  background: var(--glass-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass-xl);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
}

.model-selector__option {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-xs);
  width: 100%;
  padding: var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.model-selector__option::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.model-selector__option span {
  position: relative;
  z-index: 1;
  font-weight: 500;
  color: var(--text-primary);
}

.model-selector__option small {
  position: relative;
  z-index: 1;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.model-selector__option:hover {
  background: var(--glass-subtle);
}

.model-selector__option:hover::before {
  opacity: 0.05;
}

.model-selector__option.is-selected {
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.12) 0%, rgba(139, 92, 246, 0.08) 100%);
  border: 1px solid var(--border-accent);
}

.model-selector__option.is-selected span {
  color: var(--brand-primary);
  font-weight: 600;
}

.model-selector__option[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ============================================
   CHAT INTERFACE
   ============================================ */

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 0 var(--space-xl);
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  position: relative;
  min-height: 0; /* Critical for nested flex scrolling */
  overflow: hidden; /* Ensure children respect boundaries */
}

.chat-stream {
  flex: 1 1 auto; /* Allow shrinking */
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--space-lg) 0; /* No left/right padding */
  scrollbar-width: thin;
  scrollbar-color: transparent transparent; /* Hidden by default */
  scroll-behavior: smooth;
  min-height: 0; /* Critical for flex scrolling */
  max-height: 100%; /* Prevent overflow beyond container */
  transition: scrollbar-color 0.3s ease;
}

/* Show scrollbar when scrolling */
.chat-stream:hover,
.chat-stream:focus,
.chat-stream.scrolling {
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

.chat-stream::-webkit-scrollbar {
  width: 8px;
}

.chat-stream::-webkit-scrollbar-track {
  background: transparent;
  margin-right: 8px; /* Gap from container edge */
}

.chat-stream::-webkit-scrollbar-thumb {
  background: transparent;
  border-radius: var(--radius-full);
  transition: background var(--transition-base);
}

/* Show scrollbar on hover or scroll */
.chat-stream:hover::-webkit-scrollbar-thumb,
.chat-stream:focus::-webkit-scrollbar-thumb,
.chat-stream.scrolling::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
}

.chat-stream::-webkit-scrollbar-thumb:hover {
  background: var(--brand-primary);
}

/* Messages */
.message,
.msg {
  display: flex;
  flex-direction: column;  /* Stack row and actions vertically */
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  padding: 0 24px 0 0; /* Right padding for scrollbar gap */
  animation: messageSlideIn var(--transition-base) ease-out;
  width: 100%; /* Take full width for proper alignment */
}

.message.user,
.msg.user {
  align-items: flex-end;   /* Align to right */
}

.message.assistant,
.msg.assistant {
  align-items: flex-start; /* Align to left */
}

.message-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  min-width: 0; /* Allow flexbox to shrink properly */
}

/* User messages: max 70% width */
.msg.user .message-row {
  flex-direction: row-reverse; /* Avatar on right for user */
  max-width: 70%;
}

/* Assistant messages: max 90% width */
.msg.assistant .message-row {
  flex-direction: row;         /* Avatar on left for assistant */
  max-width: 90%;
}

@keyframes messageSlideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* User and assistant alignment handled by .message.user and .msg.user rules above */

.message-content {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  position: relative;
  animation: messageFadeIn 0.3s ease-out;
  word-wrap: break-word;
  overflow-wrap: break-word;
  box-sizing: border-box;
  width: 100%;
  max-width: 100%;
}

@keyframes messageFadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

.message.user .message-content,
.msg.user .message-content {
  background: var(--user-message-bg);
  border: 1px solid var(--user-message-border);
  color: var(--user-message-text);
  border-bottom-right-radius: var(--radius-sm);
  box-shadow: var(--shadow-glass-sm);
  backdrop-filter: blur(var(--blur-subtle));
  -webkit-backdrop-filter: blur(var(--blur-subtle));
}

.message.ai .message-content,
.msg.assistant .message-content {
  background: var(--ai-message-bg);
  border: 1px solid var(--ai-message-border);
  color: var(--ai-message-text);
  border-bottom-left-radius: var(--radius-sm);
  box-shadow: var(--shadow-glass-md);
  backdrop-filter: blur(var(--blur-default));
  -webkit-backdrop-filter: blur(var(--blur-default));
  position: relative;
}

/* Ensure text content flows properly without unwanted breaks */
.message-content p,
.message-content div,
.message-content span {
  margin: 0;
  max-width: 100%;
}

/* Removed decorative side line from AI messages */

.message-text {
  font-size: 0.9375rem;
  line-height: 1.65;
  word-wrap: break-word;
  color: var(--text-primary);
  width: 100%;
  max-width: 100%;
}

.msg .avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--glass-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand-primary);
  flex-shrink: 0;
  box-shadow: var(--shadow-xs);
  overflow: hidden;
}

.dark-theme .msg .avatar {
  background: rgba(255, 255, 255, 0.08);
  color: var(--brand-accent);
}

.msg .avatar i {
  font-size: 1rem;
}

.msg .avatar .avatar-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 50%;
}

/* Hide empty AI avatar */
.msg .avatar.ai-avatar-empty {
  display: none;
}

.msg .bubble {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  flex: 1 1 100%; /* Take full available width */
  max-width: 100%; /* Don't exceed container */
  min-width: 0; /* Prevent overflow issues */
}

.msg.user .bubble {
  align-items: flex-end;
}

.msg.assistant .bubble {
  align-items: flex-start;
}

/* Avatar spacing handled by .message-row gap */

.msg .content {
  width: 100%;
  max-width: 100%;
  min-width: 0; /* Prevent text overflow */
}

.msg .hover-tools,
.msg .footer-tools {
  width: 100%;
}

.msg.user .hover-tools.message-actions {
  justify-content: flex-end;
}

.msg.assistant .footer-tools.message-actions {
  justify-content: flex-start;
}

.message-text p {
  margin: 0 0 var(--space-md) 0;
}

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

/* Message Content Elements */
.message-text h1,
.message-text h2,
.message-text h3,
.message-text h4,
.message-text h5,
.message-text h6 {
  color: var(--text-primary);
  font-weight: 600;
  margin: var(--space-md) 0;
  line-height: 1.4;
}

.message-text h1:first-child,
.message-text h2:first-child,
.message-text h3:first-child {
  margin-top: 0;
}

.message-text a {
  color: var(--brand-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all var(--transition-fast);
}

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

.message-text ul,
.message-text ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-xl);
  color: var(--text-primary);
}

.message-text li {
  margin-bottom: var(--space-xs);
}

.message-text strong {
  font-weight: 600;
  color: var(--text-primary);
}

.message-text em {
  font-style: italic;
}

.message-text blockquote {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
  border-left: 3px solid var(--brand-primary);
  color: var(--text-secondary);
  font-style: italic;
}

.message-text code {
  padding: 2px 6px;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.05);
  font-size: 0.875em;
  font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
}

.dark-theme .message-text code {
  background: rgba(255, 255, 255, 0.08);
}

.message-text pre {
  padding: var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(0, 0, 0, 0.03);
  overflow-x: auto;
  margin: var(--space-md) 0;
}

.dark-theme .message-text pre {
  background: rgba(255, 255, 255, 0.05);
}

.message-text pre code {
  background: transparent;
  padding: 0;
}

.message-text table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-md) 0;
}

.message-text th,
.message-text td {
  padding: var(--space-sm);
  border: 1px solid var(--border-default);
  text-align: left;
}

.message-text th {
  background: var(--glass-subtle);
  font-weight: 600;
  color: var(--text-primary);
}

.message-text hr {
  border: none;
  border-top: 1px solid var(--border-default);
  margin: var(--space-lg) 0;
}

/* Message Actions */
.message-actions {
  display: flex;
  gap: var(--space-sm);
  opacity: 0;
  transition: opacity var(--transition-fast);
  margin-top: var(--space-xs);
  padding: 0 var(--space-sm);
}

.msg:hover .message-actions,
.message:hover .message-actions {
  opacity: 1;
}

.message-actions button,
.msg-tool {
  padding: var(--space-xs);
  border: none;
  background: transparent;
  color: var(--text-tertiary);
  font-size: 1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  border-radius: var(--radius-sm);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.message-actions button:hover,
.msg-tool:hover {
  background: var(--glass-subtle);
  color: var(--text-primary);
  box-shadow: var(--shadow-xs);
}

/* ============================================
   CUSTOM TOOLTIPS
   ============================================ */

/* Hide default tooltips */
[title] {
  position: relative;
}

/* Custom tooltip */
[data-tooltip] {
  position: relative;
  cursor: pointer;
}

[data-tooltip]::before,
[data-tooltip]::after {
  position: absolute;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 9999;
}

/* Tooltip content */
[data-tooltip]::before {
  content: attr(data-tooltip);
  background: var(--glass-elevated);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  color: var(--text-primary);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-default);
  line-height: 1.4;
}

/* Tooltip arrow */
[data-tooltip]::after {
  content: '';
  width: 0;
  height: 0;
  border: 5px solid transparent;
}

/* Default position: bottom */
[data-tooltip]::before {
  top: calc(100% + 8px);
  bottom: auto;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
}

[data-tooltip]::after {
  top: calc(100% + 3px);
  bottom: auto;
  left: 50%;
  transform: translateX(-50%);
  border-bottom-color: var(--border-default);
  border-top-color: transparent;
}

/* Show tooltip on hover/focus */
[data-tooltip]:hover::before,
[data-tooltip]:hover::after,
[data-tooltip]:focus::before,
[data-tooltip]:focus::after {
  opacity: 1;
  visibility: visible;
}

/* Default (bottom) hover state */
[data-tooltip]:hover::before,
[data-tooltip]:focus::before {
  transform: translateX(-50%) translateY(0);
}

/* Tooltip position variants */
[data-tooltip][data-tooltip-pos="top"]::before {
  bottom: calc(100% + 8px);
  top: auto;
  transform: translateX(-50%) translateY(4px);
}

[data-tooltip][data-tooltip-pos="top"]::after {
  bottom: calc(100% + 3px);
  top: auto;
  border-top-color: var(--border-default);
  border-bottom-color: transparent;
}

[data-tooltip][data-tooltip-pos="bottom"]::before {
  top: calc(100% + 8px);
  bottom: auto;
  transform: translateX(-50%) translateY(-4px);
}

[data-tooltip][data-tooltip-pos="bottom"]::after {
  top: calc(100% + 3px);
  bottom: auto;
  border-bottom-color: var(--border-default);
  border-top-color: transparent;
}

[data-tooltip][data-tooltip-pos="bottom"]:hover::before,
[data-tooltip][data-tooltip-pos="bottom"]:focus::before {
  transform: translateX(-50%) translateY(0);
}

[data-tooltip][data-tooltip-pos="left"]::before {
  right: calc(100% + 8px);
  left: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%) translateX(4px);
}

[data-tooltip][data-tooltip-pos="left"]::after {
  right: calc(100% + 3px);
  left: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  border-left-color: var(--border-default);
  border-right-color: transparent;
}

[data-tooltip][data-tooltip-pos="left"]:hover::before,
[data-tooltip][data-tooltip-pos="left"]:focus::before {
  transform: translateY(-50%) translateX(0);
}

[data-tooltip][data-tooltip-pos="right"]::before {
  left: calc(100% + 8px);
  right: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%) translateX(-4px);
}

[data-tooltip][data-tooltip-pos="right"]::after {
  left: calc(100% + 3px);
  right: auto;
  top: 50%;
  bottom: auto;
  transform: translateY(-50%);
  border-right-color: var(--border-default);
  border-left-color: transparent;
}

[data-tooltip][data-tooltip-pos="right"]:hover::before,
[data-tooltip][data-tooltip-pos="right"]:focus::before {
  transform: translateY(-50%) translateX(0);
}

/* ============================================
   INPUT AREA - Premium Glass Input
   ============================================ */

.input-area {
  position: sticky;
  bottom: 0;
  padding: var(--space-lg) 0;
  background: linear-gradient(to top, var(--bg-primary) 80%, transparent 100%);
  z-index: 100;
}

.input-container {
  display: flex;
  align-items: flex-end;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--glass-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-glass-xl);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  transition: all var(--transition-base);
}

.input-container:focus-within {
  border-color: var(--input-focus-border);
  box-shadow: var(--shadow-glass-xl), var(--focus-ring);
}

#input {
  flex: 1;
  min-height: 24px;
  max-height: 200px;
  padding: var(--space-sm) var(--space-md);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--input-text);
  font-size: 0.9375rem;
  font-family: inherit;
  line-height: 1.5;
  resize: none;
  outline: none;
  transition: all var(--transition-fast);
}

#input::placeholder {
  color: var(--input-placeholder);
}

.input-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.input-buttons button {
  width: 36px;
  height: 36px;
  padding: 0;
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  position: relative;
}

.input-buttons button:hover {
  background: var(--glass-subtle);
  color: var(--brand-primary);
  transform: scale(1.1);
}

.input-buttons button:active {
  transform: scale(0.95);
}

#send {
  background: var(--button-primary-bg);
  color: var(--button-primary-text);
  box-shadow: var(--shadow-sm);
}

#send:hover {
  background: var(--button-primary-hover);
  box-shadow: var(--shadow-md), 0 0 20px rgba(99, 102, 241, 0.3);
  transform: scale(1.05);
}

#send:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: scale(1);
}

#send i {
  font-size: 1rem;
}

/* ============================================
   ATTACHMENTS PREVIEW
   ============================================ */

.attachments-preview {
  display: none;
  position: fixed;
  bottom: 140px;
  left: 50%;
  transform: translateX(-50%);
  max-width: 900px;
  width: calc(100% - 40px);
  padding: var(--space-md);
  background: var(--glass-elevated);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass-lg);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  z-index: 99;
  animation: slideUp var(--transition-base) ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

.attachments-preview.is-visible {
  display: block;
}

.attachments-track {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

.attachments-track::-webkit-scrollbar {
  height: 6px;
}

.attachments-track::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

.attachments-track::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: var(--radius-full);
}

.attachment-card {
  position: relative;
  flex-shrink: 0;
  width: 100px;
  height: 100px;
  padding: var(--space-md);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  background: var(--glass-subtle);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  box-shadow: var(--shadow-glass-sm);
  backdrop-filter: blur(var(--blur-subtle));
  -webkit-backdrop-filter: blur(var(--blur-subtle));
  transition: all var(--transition-fast);
}

.attachment-card:hover {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glass-md);
  transform: translateY(-2px);
}

.attachment-card__icon {
  font-size: 1.5rem;
  color: var(--brand-primary);
}

.attachment-card__name {
  font-size: 0.75rem;
  color: var(--text-secondary);
  text-align: center;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.attachment-card .remove-attachment {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 20px;
  height: 20px;
  padding: 0;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  background: var(--glass-elevated);
  color: var(--brand-error);
  font-size: 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: all var(--transition-fast);
}

.attachment-card:hover .remove-attachment {
  opacity: 1;
}

.remove-attachment:hover {
  background: rgba(239, 68, 68, 0.1);
  border-color: var(--brand-error);
  transform: scale(1.1);
}

/* ============================================
   TYPING INDICATOR
   ============================================ */

.typing-indicator {
  display: none;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-lg);
  border-bottom-left-radius: var(--radius-sm);
  background: var(--ai-message-bg);
  border: 1px solid var(--ai-message-border);
  box-shadow: var(--shadow-glass-sm);
  backdrop-filter: blur(var(--blur-default));
  -webkit-backdrop-filter: blur(var(--blur-default));
  align-self: flex-start;
  animation: messageSlideIn var(--transition-base) ease-out;
}

.typing-indicator.visible {
  display: flex;
}

.typing-indicator span {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--brand-primary);
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(1) {
  animation-delay: -0.32s;
}

.typing-indicator span:nth-child(2) {
  animation-delay: -0.16s;
}

@keyframes typingBounce {

  0%,
  80%,
  100% {
    opacity: 0.3;
    transform: scale(0.8);
  }

  40% {
    opacity: 1;
    transform: scale(1);
  }
}

/* ============================================
   FOCUS STATES & ACCESSIBILITY
   ============================================ */

*:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 2px;
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }

  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInFromBottom {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   RESPONSIVE ADJUSTMENTS
   ============================================ */

@media (max-width: 768px) {
  .top-left-logo {
    display: none;
  }

  .message-content {
    max-width: 85%;
  }

  .chat-container {
    padding: 0 var(--space-md);
  }
}

/* ============================================
   DARK THEME SPECIFIC ADJUSTMENTS
   ============================================ */

.dark-theme .logo-container {
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
}

.dark-theme .logo-container:hover {
  filter: drop-shadow(0 4px 12px rgba(129, 140, 248, 0.3));
}

/* ============================================
   UTILITIES
   ============================================ */

.hidden {
  display: none !important;
}

.invisible {
  visibility: hidden !important;
}

.opacity-0 {
  opacity: 0 !important;
}

/* Empty State Styling */
.chat-stream:empty::before,
#saved-chats-list:empty::before {
  content: attr(data-empty-message);
  display: block;
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-tertiary);
  font-size: 0.875rem;
}

#saved-chats-list:empty::before {
  content: 'No saved chats yet';
  padding: var(--space-xl) var(--space-md);
}

.chat-stream .welcome-message {
  text-align: center;
  padding: var(--space-2xl);
  color: var(--text-secondary);
}

.chat-stream .welcome-message h2 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--space-md);
  background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.pointer-events-none {
  pointer-events: none !important;
}