/**
 * LMArena - Main Styles
 * Component-based responsive design with LMArena-level polish
 */

/* ========================================
   CSS Variables / Design Tokens
   Yupp.ai/QuickTake Inspired Design System
   ======================================== */

/* ========================================
   App Visibility & Base Animations
   ======================================== */

/* App container - JS controls visibility via inline styles */
#app {
  opacity: 1;
}

/* Auth loading overlay - controlled by JS, shown until auth resolves */
#auth-loading-overlay {
  /* JS will set display: none when ready */
}

/* Smooth fade-in animation for elements */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(16px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* Animation utility classes */
.animate-fade-in {
  animation: fadeIn 0.3s ease-out forwards;
}

.animate-fade-in-up {
  animation: fadeInUp 0.4s ease-out forwards;
}

.animate-fade-in-scale {
  animation: fadeInScale 0.3s ease-out forwards;
}

.animate-slide-in-left {
  animation: slideInLeft 0.3s ease-out forwards;
}

.animate-slide-in-right {
  animation: slideInRight 0.3s ease-out forwards;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

/* Staggered animation delays */
.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }

/* Skeleton loading animation */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--bg-3) 0%,
    var(--bg-4) 50%,
    var(--bg-3) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* Transition utilities */
.transition-all {
  transition: all var(--transition-normal);
}

.transition-fast {
  transition: all var(--transition-fast);
}

.transition-slow {
  transition: all var(--transition-slow);
}

/* Hover transform utilities */
.hover-lift:hover {
  transform: translateY(-2px);
}

.hover-scale:hover {
  transform: scale(1.02);
}

.hover-glow:hover {
  box-shadow: var(--shadow-glow);
}

:root {
  /* Font Family */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-family-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;

  /* Background Colors - Darker, Premium Feel */
  --bg-0: #000000;
  --bg-1: #0a0b10;
  --bg-2: #12131a;
  --bg-3: #1a1b24;
  --bg-4: #22232e;
  
  /* Card & Surface Colors */
  --card-bg: #12131a;
  --card-bg-hover: #1a1b24;
  --card-border: rgba(255, 255, 255, 0.08);
  --card-border-hover: rgba(255, 255, 255, 0.12);
  
  /* Sidebar Colors */
  --sidebar-bg: #0d0e14;
  --sidebar-item-hover: rgba(255, 255, 255, 0.06);
  --sidebar-item-active: rgba(203, 146, 117, 0.12);
  
  /* Line/Border Colors */
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.12);
  --line-subtle: rgba(255, 255, 255, 0.04);

  /* Brand Colors - Warmer Tones */
  --color-teal: #577B87;
  --color-cyan: #4AABC2;
  --color-terra: #CB9275;
  --color-terra-light: #e8b69d;
  --color-terra-dark: #a67656;
  --color-cream: #FDF4CD;
  --color-blue: #3b82f6;
  --color-white: #ffffff;
  --color-black: #000000;
  
  /* Badge Colors */
  --badge-pro: #CB9275;
  --badge-pro-bg: rgba(203, 146, 117, 0.15);
  --badge-new: #4AABC2;
  --badge-new-bg: rgba(74, 171, 194, 0.15);
  --badge-beta: #FDF4CD;
  --badge-beta-bg: rgba(253, 244, 205, 0.15);
  --badge-search: #a78bfa;
  --badge-search-bg: rgba(167, 139, 250, 0.15);

  /* Text Colors - Refined Hierarchy */
  --text-primary: rgba(255, 255, 255, 0.95);
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-tertiary: rgba(255, 255, 255, 0.5);
  --text-muted: rgba(255, 255, 255, 0.35);
  --text-1: #ffffff;
  --text-2: rgba(255, 255, 255, 0.8);
  --text-3: rgba(255, 255, 255, 0.6);

  /* Semantic Colors */
  --color-success: #4ade80;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  --color-info: var(--color-cyan);

  /* Glass Effects - Premium Layering */
  --glass-dark: rgba(0, 0, 0, 0.75);
  --glass-header: rgba(10, 11, 16, 0.85);
  --glass-input: rgba(18, 19, 26, 0.95);
  --glass-light: rgba(0, 0, 0, 0.35);
  --glass-btn: rgba(255, 255, 255, 0.06);
  --glass-btn-hover: rgba(255, 255, 255, 0.1);
  --glass-hover: rgba(255, 255, 255, 0.06);
  --glass-active: rgba(255, 255, 255, 0.1);

  /* Glass Borders - Subtle Premium Edges */
  --border-glass: 1px solid rgba(255, 255, 255, 0.06);
  --border-glass-strong: 1px solid rgba(255, 255, 255, 0.1);
  --border-focus: 2px solid var(--color-terra);
  --border-card: 1px solid rgba(255, 255, 255, 0.08);

  /* Layout Spacing */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 72px;
  --header-height: 56px;
  --input-width: 720px;

  /* Border Radius Scale */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  --border-radius: var(--radius-lg);
  --border-radius-sm: var(--radius-sm);

  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Typography Scale */
  --text-xs: 11px;
  --text-sm: 13px;
  --text-base: 15px;
  --text-lg: 17px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;

  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  --leading-loose: 1.75;

  /* Transitions - Smooth Premium Feel */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows - Layered Depth */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.7);
  --shadow-card: 0 2px 8px rgba(0, 0, 0, 0.3), 0 0 1px rgba(255, 255, 255, 0.05);
  --shadow-card-hover: 0 4px 16px rgba(0, 0, 0, 0.4), 0 0 1px rgba(255, 255, 255, 0.08);
  --shadow-glow: 0 0 20px rgba(203, 146, 117, 0.15);
  --shadow-glow-hover: 0 0 30px rgba(203, 146, 117, 0.25);
  --shadow-glow-btn: 0 0 12px rgba(203, 146, 117, 0.2);
  --shadow-glow-btn-hover: 0 0 20px rgba(203, 146, 117, 0.3);
  --shadow-inset: inset 0 1px 2px rgba(0, 0, 0, 0.3);

  /* Focus Ring */
  --focus-ring: 0 0 0 2px rgba(203, 146, 117, 0.5);
  --focus-ring-offset: 0 0 0 4px rgba(203, 146, 117, 0.25);

  /* Z-index Layers */
  --z-base: 1;
  --z-header: 10;
  --z-sidebar: 20;
  --z-overlay: 30;
  --z-dropdown: 35;
  --z-modal: 40;
  --z-toast: 50;

  /* Input Styles */
  --input-bg: rgba(255, 255, 255, 0.04);
  --input-bg-hover: rgba(255, 255, 255, 0.06);
  --input-border: rgba(255, 255, 255, 0.08);
  --input-border-focus: rgba(203, 146, 117, 0.5);
  
  /* Button Styles */
  --btn-primary-bg: var(--color-terra);
  --btn-primary-hover: var(--color-terra-light);
  --btn-secondary-bg: rgba(255, 255, 255, 0.06);
  --btn-secondary-hover: rgba(255, 255, 255, 0.1);
  --btn-ghost-hover: rgba(255, 255, 255, 0.06);
  
  /* Preference Button */
  --prefer-btn-bg: rgba(203, 146, 117, 0.12);
  --prefer-btn-border: rgba(203, 146, 117, 0.3);
  --prefer-btn-text: var(--color-terra);
  --prefer-btn-hover-bg: rgba(203, 146, 117, 0.2);
  
  /* Discord Card */
  --discord-bg: rgba(88, 101, 242, 0.1);
  --discord-border: rgba(88, 101, 242, 0.2);
  --discord-color: #5865F2;
  
  /* Brand Accent */
  --brand: var(--color-terra);
  --brand-hover: var(--color-terra-light);
}

/* ========================================
   Reset & Base
   ======================================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family-base);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: var(--leading-normal);
  background: var(--bg-0);
  color: var(--text-primary);
  overflow: hidden;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  font-feature-settings: 'kern' 1, 'liga' 1, 'calt' 1;
  font-kerning: normal;
}

/* Global text styling for crisp rendering */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: 600;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

p,
span,
div,
li,
a,
button,
input,
textarea,
select {
  font-family: var(--font-family-base);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* Drawer scroll lock (mobile sidebar) */
body.drawer-open {
  position: fixed;
  width: 100%;
  overflow: hidden;
}

/* Skip link (premium accessibility) */
.skip-link {
  position: absolute;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  background: rgba(0, 0, 0, 0.8);
  border: var(--border-glass-strong);
  color: var(--color-white);
  font-family: var(--font-family-base);
  font-size: var(--text-sm);
  font-weight: 500;
  transform: translateY(-150%);
  transition: transform var(--transition-fast);
  z-index: var(--z-toast);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.skip-link:focus {
  transform: translateY(0);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: transparent;
  cursor: pointer;
  color: inherit;
  transition: all var(--transition-fast);
}

/* Focus States - Accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring), var(--focus-ring-offset);
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

input,
textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: transparent;
  color: inherit;
  outline: none;
}

/* Selection styling */
::selection {
  background: var(--color-cyan);
  color: var(--color-black);
}

/* ========================================
   App Layout
   ======================================== */
#app {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

/* Background Image */
.app-background {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

/* Main Wrapper - Contains header + content + input */
.main-wrapper {
  position: fixed;
  top: 0;
  left: var(--sidebar-width);
  right: 0;
  bottom: 0;
  display: flex;
  flex-direction: column;
  transition: left var(--transition-slow);
  z-index: 1;
}

.sidebar.collapsed ~ .main-wrapper {
  left: var(--sidebar-collapsed-width);
}

/* Main Content */
.main-content {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
  padding-bottom: var(--space-8);
}

/* ========================================
   Chat Area (Arena-style: 1 prompt -> 2 replies)
   ======================================== */
.chat-area {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
}

.chat-empty {
  padding: var(--space-8);
  text-align: center;
  border: var(--border-glass-strong);
  box-shadow: var(--shadow-md);
  max-width: 600px;
  margin: 80px auto;
}

.chat-empty-icon {
  opacity: 0.35;
  margin-bottom: var(--space-3);
  display: flex;
  justify-content: center;
}

.chat-empty-title {
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.chat-empty-subtitle {
  font-size: var(--text-sm);
  opacity: 0.65;
  font-family: 'Inria Sans', sans-serif;
}

.chat-turns {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--space-4) 0;
}

/* Scroll Sentinel - ChatGPT-style scroll anchor */
.scroll-sentinel {
  /* Invisible element that acts as scroll target */
  height: 1px;
  width: 100%;
  /* Creates 20px gap between content and vote buttons when scrolled into view */
  margin-top: 20px;
  margin-bottom: 0;
  pointer-events: none;
  opacity: 0;
}

.chat-turn {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  animation: fadeInUp 0.4s ease-out forwards;
}

.prompt-row {
  display: flex;
  justify-content: center;
}

.prompt-bubble {
  width: min(820px, 100%);
  padding: var(--space-5);
  border: var(--border-glass-strong);
}

.prompt-label {
  font-size: var(--text-xs);
  letter-spacing: 0.6px;
  text-transform: uppercase;
  opacity: 0.6;
  font-family: var(--font-family-base);
  font-weight: 500;
  margin-bottom: var(--space-2);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.prompt-text {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
}

/* User message container (right-aligned) */
.user-message-container {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-6);
  animation: slideInRight 0.3s ease-out;
}

.user-message {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  max-width: 80%;
}

.user-avatar {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 600;
  color: white;
  order: 2;
}

.user-bubble {
  max-width: 70%;
  padding: var(--space-3) var(--space-4);
  background: rgba(74, 171, 194, 0.12);
  border: 1px solid rgba(74, 171, 194, 0.25);
  border-radius: 18px 18px 4px 18px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.user-text {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
  color: rgba(255, 255, 255, 0.95);
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }

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

/* Assistant comparison grid */
.responses-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

.responses-grid.single-response {
  grid-template-columns: 1fr;
  max-width: 800px;
  margin: 0 auto;
}

.response-card {
  padding: var(--space-5);
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  height: 100%;
  min-height: 400px;
  max-height: 600px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal), transform var(--transition-normal);
  animation: fadeInUp 0.4s ease-out forwards;
}

/* Stagger animation for left/right cards */
.response-card.left {
  animation-delay: 0.1s;
  opacity: 0;
}

.response-card.right {
  animation-delay: 0.2s;
  opacity: 0;
}

.response-card:hover {
  border-color: var(--card-border-hover);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}

.response-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.assistant-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.02em;
  flex-shrink: 0;
}

.model-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-family-base);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
}

.model-badge .model-icon {
  width: 20px;
  height: 20px;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-btn);
  flex-shrink: 0;
}

.model-badge .model-icon svg {
  width: 14px;
  height: 14px;
}

.model-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  display: inline-block;
}

.model-dot.left {
  background: var(--color-cyan);
  box-shadow: 0 0 10px rgba(74, 171, 194, 0.4);
}

.model-dot.right {
  background: var(--color-terra);
  box-shadow: 0 0 10px rgba(203, 146, 117, 0.4);
}

/* Model Badge Tags (PRO, NEW, BETA, SEARCH) */
.model-tag {
  display: inline-flex;
  align-items: center;
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.model-tag.pro {
  background: var(--badge-pro-bg);
  color: var(--badge-pro);
  border: 1px solid rgba(203, 146, 117, 0.25);
}

.model-tag.new {
  background: var(--badge-new-bg);
  color: var(--badge-new);
  border: 1px solid rgba(74, 171, 194, 0.25);
}

.model-tag.beta {
  background: var(--badge-beta-bg);
  color: var(--badge-beta);
  border: 1px solid rgba(253, 244, 205, 0.25);
}

.model-tag.search {
  background: var(--badge-search-bg);
  color: var(--badge-search);
  border: 1px solid rgba(167, 139, 250, 0.25);
}

.message-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.message-actions .icon-btn {
  width: 34px;
  height: 34px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.message-actions .icon-btn svg {
  display: block;
}

.response-card.is-expanded {
  grid-column: 1 / -1;
  z-index: 2;
}

.copy-btn {
  width: 34px;
  height: 34px;
}

.copy-btn.copied {
  border-color: rgba(74, 222, 128, 0.6);
  box-shadow: 0 0 16px rgba(74, 222, 128, 0.25);
}

.response-body {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  white-space: pre-wrap;
  opacity: 0.92;
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 8px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}

.response-body::-webkit-scrollbar {
  width: 6px;
}

.response-body::-webkit-scrollbar-track {
  background: transparent;
}

.response-body::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 3px;
}

.response-body::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
}

.response-card.is-streaming .response-body {
  opacity: 0.95;
}

.response-card.is-winner {
  border-color: rgba(74, 222, 128, 0.55);
  box-shadow: 0 0 26px rgba(74, 222, 128, 0.18), var(--shadow-md);
}

.response-card.is-loser {
  opacity: 0.7;
  border-color: rgba(255, 255, 255, 0.16);
}

.vote-row {
  display: flex;
  justify-content: center;
}

.vote-panel {
  width: min(820px, 100%);
  padding: var(--space-4);
  border: var(--border-glass-strong);
  box-shadow: var(--shadow-md);
}

.vote-title {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  opacity: 0.7;
  margin-bottom: var(--space-3);
  text-align: center;
}

.vote-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.vote-btn {
  padding: 10px 14px;
  border-radius: 12px;
  border: var(--border-glass);
  background: rgba(0, 0, 0, 0.15);
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  transition: var(--transition-normal);
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
}

.vote-btn:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.vote-btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.vote-btn.active {
  border-color: rgba(255, 255, 255, 0.35);
  box-shadow: 0 0 0 3px rgba(74, 171, 194, 0.15);
}

.vote-btn.vote-tie.active {
  box-shadow: 0 0 0 3px rgba(253, 244, 205, 0.12);
}

.vote-hint {
  margin-top: var(--space-3);
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-xs);
  opacity: 0.7;
  text-align: center;
}

.vote-hint.is-error {
  opacity: 0.95;
  color: rgba(248, 113, 113, 0.95);
}

/* ========================================
   Leaderboard Modal (inspired by DualMind_UI)
   ======================================== */

.dm-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  z-index: var(--z-modal);
  backdrop-filter: blur(6px);
}

.dm-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(980px, calc(100vw - 28px));
  max-height: min(78vh, 720px);
  overflow: hidden;
  border-radius: 18px;
  border: var(--border-glass-strong);
  box-shadow: 0 22px 80px rgba(0, 0, 0, 0.55);
  background: rgba(10, 12, 14, 0.72);
  z-index: calc(var(--z-modal) + 1);
}

.dm-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: var(--border-glass);
}

.dm-modal-title {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-lg);
  letter-spacing: 0.2px;
}

.dm-modal-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.dm-modal-btn {
  padding: 8px 12px;
  border-radius: 12px;
  border: var(--border-glass);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  transition: var(--transition-normal);
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
}

.dm-modal-btn:hover {
  background: rgba(255, 255, 255, 0.10);
}

.dm-modal-close {
  width: 34px;
  height: 34px;
  border-radius: 12px;
  border: var(--border-glass);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  font-size: 18px;
  line-height: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.dm-modal-body {
  padding: 16px;
  overflow: auto;
  max-height: calc(min(78vh, 720px) - 60px);
}

.dm-lb-shell {
  width: 100%;
}

.dm-lb-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.dm-lb-title {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-lg);
}

.dm-lb-subtitle {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  opacity: 0.65;
  margin-top: 2px;
}

.dm-lb-refresh {
  padding: 8px 12px;
  border-radius: 12px;
  border: var(--border-glass);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  transition: var(--transition-normal);
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
}

.dm-lb-refresh:hover {
  background: rgba(255, 255, 255, 0.10);
}

.dm-lb-table-wrap {
  border: var(--border-glass);
  border-radius: 14px;
  overflow: hidden;
}

.dm-lb-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
}

.dm-lb-table thead th {
  text-align: left;
  font-size: var(--text-xs);
  opacity: 0.65;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.04);
  border-bottom: var(--border-glass);
}

.dm-lb-row td,
.dm-lb-row-skel td {
  padding: 12px 14px;
  border-bottom: var(--border-glass);
}

.dm-lb-row:last-child td,
.dm-lb-row-skel:last-child td {
  border-bottom: none;
}

.dm-lb-rank-pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  border: var(--border-glass);
  background: rgba(255, 255, 255, 0.04);
}

.dm-lb-rank.rank-1 .dm-lb-rank-pill {
  border-color: rgba(253, 224, 71, 0.35);
}

.dm-lb-rank.rank-2 .dm-lb-rank-pill {
  border-color: rgba(209, 213, 219, 0.35);
}

.dm-lb-rank.rank-3 .dm-lb-rank-pill {
  border-color: rgba(203, 146, 117, 0.45);
}

.dm-lb-model-name {
  font-weight: 700;
}

.dm-lb-model-provider {
  font-size: var(--text-xs);
  opacity: 0.6;
  margin-top: 2px;
}

.dm-lb-win-pill {
  display: inline-flex;
  padding: 4px 10px;
  border-radius: 999px;
  border: var(--border-glass);
  background: rgba(74, 171, 194, 0.10);
}

.dm-lb-num {
  opacity: 0.85;
}

.dm-lb-state {
  border: var(--border-glass);
  border-radius: 14px;
  padding: 18px;
  text-align: center;
}

.dm-lb-state-title {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-lg);
  margin-bottom: 6px;
}

.dm-lb-state-subtitle {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  opacity: 0.65;
}

.dm-lb-action {
  margin-top: 12px;
  padding: 10px 14px;
  border-radius: 12px;
  border: var(--border-glass);
  background: rgba(255, 255, 255, 0.06);
  color: rgba(255, 255, 255, 0.92);
  cursor: pointer;
  transition: var(--transition-normal);
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
}

.dm-lb-action:hover {
  background: rgba(255, 255, 255, 0.10);
}

.dm-skel {
  height: 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

.dm-skel.w-30 {
  width: 30%;
}

.dm-skel.w-40 {
  width: 40%;
}

.dm-skel.w-70 {
  width: 70%;
}

.stream-caret {
  display: inline-block;
  width: 8px;
  height: 1.1em;
  margin-left: 2px;
  background: rgba(255, 255, 255, 0.7);
  vertical-align: text-bottom;
  animation: caretBlink 1s steps(2, end) infinite;
}

@keyframes caretBlink {

  0%,
  49% {
    opacity: 1;
  }

  50%,
  100% {
    opacity: 0;
  }
}

/* Direct chat (single thread) */
.direct-thread {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.direct-msg {
  display: flex;
}

.direct-msg.user {
  justify-content: flex-end;
}

.direct-msg.assistant {
  justify-content: flex-start;
}

.direct-bubble {
  max-width: min(760px, 100%);
  padding: var(--space-4);
  border: var(--border-glass-strong);
}

.direct-msg.user .direct-bubble {
  background: rgba(74, 171, 194, 0.10);
}

.direct-meta {
  font-size: var(--text-xs);
  opacity: 0.6;
  font-family: 'Inria Sans', sans-serif;
  margin-bottom: var(--space-2);
}

.direct-text {
  font-family: 'Inria Sans', sans-serif;
  font-size: var(--text-sm);
  white-space: pre-wrap;
}

@media (max-width: 900px) {
  .responses-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
    /* Increased gap for vertical stack */
  }

  .response-card {
    min-height: auto;
    /* Allow auto height on mobile */
  }

  .chat-area {
    padding-bottom: 20px;
  }
}

/* ========================================
   Sidebar Component
   ======================================== */
#sidebar-container {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100%;
  z-index: var(--z-sidebar);
  pointer-events: none;
  transition: width var(--transition-slow);
}

#sidebar-container>* {
  pointer-events: auto;
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-normal);
  z-index: calc(var(--z-sidebar) - 1);
  pointer-events: none;
}

.sidebar-overlay.active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100%;
  background: var(--sidebar-bg);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transition: width var(--transition-slow), transform var(--transition-slow);
  z-index: var(--z-sidebar);
}

.sidebar.collapsed {
  width: var(--sidebar-collapsed-width);
}

.sidebar.open {
  width: var(--sidebar-width);
}

/* Sidebar Header */
.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-5) var(--space-4);
  min-height: auto;
}

.logo-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0;
  background: transparent;
  border: none;
  border-radius: 0;
  transition: opacity var(--transition-fast);
}

.sidebar.collapsed .logo-btn {
  padding: 0;
  gap: 0;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: 0;
  width: auto;
  height: auto;
  margin: 0 auto;
}

.sidebar.collapsed .logo-text {
  display: none;
}

.logo-btn:hover {
  opacity: 0.8;
  background: transparent;
  border-color: transparent;
  transform: none;
}

.logo-btn:active {
  transform: none;
}

.logo-icon {
  display: flex;
  align-items: center;
}

.logo-text {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.5px;
  color: var(--text-primary);
  transition: opacity var(--transition-fast);
}

.logo-chevron {
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast);
}

.logo-btn.dropdown-open .logo-chevron {
  transform: rotate(180deg);
}

.sidebar-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-glass);
  transition: none;
}

.sidebar.collapsed .sidebar-toggle {
  display: none;
}

.sidebar-toggle:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.sidebar-toggle:active {
  background: var(--glass-active);
}

/* Floating toggle button when sidebar is collapsed (desktop only) */
.sidebar.collapsed~.floating-toggle,
.sidebar.collapsed+.floating-toggle {
  position: fixed;
  top: 20px;
  left: 20px;
  z-index: calc(var(--z-sidebar) + 1);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--glass-dark);
  border: var(--border-glass-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: none;
  box-shadow: var(--shadow-lg);
}

.sidebar.collapsed~.floating-toggle:hover,
.sidebar.collapsed+.floating-toggle:hover {
  background: var(--glass-hover);
  border-color: var(--color-cyan);
  box-shadow: var(--shadow-glow);
}

.sidebar.collapsed~.floating-toggle:active,
.sidebar.collapsed+.floating-toggle:active {
  transform: none;
}

/* Sidebar Navigation */
.sidebar-nav {
  padding: var(--space-3) var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-normal);
  position: relative;
  transform: translateX(0);
}

.nav-item:hover {
  background: var(--sidebar-item-hover);
  color: var(--text-primary);
  transform: translateX(4px);
}

.nav-item.active {
  background: var(--sidebar-item-active);
  color: var(--color-terra);
}

.nav-item:active {
  transform: translateX(2px) scale(0.98);
}

.nav-item .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  opacity: 0.8;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-item:hover .nav-icon {
  opacity: 1;
  transform: scale(1.1);
}

.nav-item.active .nav-icon {
  opacity: 1;
}

.nav-item .nav-badge {
  margin-left: auto;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  background: var(--badge-beta-bg);
  color: var(--badge-beta);
}

.sidebar.collapsed .nav-item {
  padding: var(--space-3);
  justify-content: center;
  gap: 0;
}

.sidebar.collapsed .nav-text,
.sidebar.collapsed .nav-badge {
  display: none;
}

/* Tooltip for collapsed state */
.sidebar.collapsed .nav-item::after {
  content: attr(title);
  position: absolute;
  left: calc(100% + 8px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--glass-dark);
  color: white;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  border: var(--border-glass);
  font-size: var(--text-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: 1000;
  pointer-events: none;
}

.sidebar.collapsed .nav-item:hover::after {
  opacity: 1;
  visibility: visible;
}

.nav-item:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.08);
}

.nav-item.active {
  background: var(--glass-active);
  border-color: rgba(255, 255, 255, 0.1);
}

.nav-item:active {
  transform: scale(0.98);
}

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.nav-text {
  font-size: var(--text-lg);
  font-weight: 400;
  transition: opacity var(--transition-fast);
  white-space: nowrap;
}

.nav-item:not(.active) .nav-text {
  opacity: 0.6;
}

.nav-item:hover .nav-text {
  opacity: 1;
}

/* Floating Voting Buttons - Modern Design */
.floating-voting {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translate(-50%, calc(-100% - 14px));
  display: flex !important;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 24px;
  background: rgba(20, 20, 20, 0.95);
  backdrop-filter: blur(20px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(255, 255, 255, 0.05);
  z-index: 1000;
  opacity: 1;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  max-width: calc(100% - 16px);
  flex-wrap: nowrap;
}

@media (max-width: 560px) {
  .floating-voting {
    padding: 8px 12px;
    gap: 8px;
    max-width: 96%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    justify-content: flex-start;
    /* Alignment for scroll */
    background: rgba(15, 15, 20, 0.96);
    /* Darker background for legibility */
    border-color: rgba(255, 255, 255, 0.15);
    bottom: calc(100% + 10px);
    /* Position above input */
    top: auto;
    transform: translateX(-50%);
    border-radius: 12px;
    white-space: nowrap;
    /* Hide scrollbar */
    scrollbar-width: none;
    -ms-overflow-style: none;
  }

  .floating-voting::-webkit-scrollbar {
    display: none;
  }

  .vote-btn-light {
    padding: 8px 16px;
    /* Smaller touch targets padding but keep clickable area */
    font-size: 13px;
    flex-shrink: 0;
  }
}

.floating-voting[hidden] {
  display: none !important;
}

.vote-btn-light {
  position: relative;
  padding: 12px 24px;
  background: rgba(40, 40, 40, 0.8);
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  color: rgba(255, 255, 255, 0.9);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  white-space: nowrap;
  user-select: none;
  -webkit-user-select: none;
}

.vote-btn-light:hover {
  background: rgba(50, 50, 50, 0.9);
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
}

/* Hover states with border colors */
.vote-btn-light[data-vote="left"]:hover {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3), 0 0 0 1px #10b981;
}

.vote-btn-light[data-vote="right"]:hover {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3), 0 0 0 1px #10b981;
}

.vote-btn-light[data-vote="tie"]:hover {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.15);
  color: #10b981;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3), 0 0 0 1px #10b981;
}

.vote-btn-light[data-vote="both-bad"]:hover {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.15);
  color: #ef4444;
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.3), 0 0 0 1px #ef4444;
}

.vote-btn-light:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Active states - permanently applied after click */
.vote-btn-light.active {
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  border-color: #3b82f6;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.4), 0 0 0 1px #3b82f6;
}

.vote-btn-light.active[data-vote="left"],
.vote-btn-light.active[data-vote="right"],
.vote-btn-light.active[data-vote="tie"] {
  border-color: #10b981;
  background: rgba(16, 185, 129, 0.2);
  color: #34d399;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.5), 0 0 0 2px #10b981;
}

.vote-btn-light.active[data-vote="both-bad"] {
  border-color: #ef4444;
  background: rgba(239, 68, 68, 0.2);
  color: #f87171;
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.5), 0 0 0 2px #ef4444;
}

/* Add icons to buttons */
.vote-btn-light[data-vote="left"]::before {
  content: "←";
  margin-right: 8px;
  font-size: 16px;
}

.vote-btn-light[data-vote="right"]::after {
  content: "→";
  margin-left: 8px;
  font-size: 16px;
}

.vote-btn-light[data-vote="tie"]::before {
  content: "⚖";
  margin-right: 8px;
  font-size: 14px;
}

.vote-btn-light[data-vote="both-bad"]::before {
  content: "⊘";
  margin-right: 8px;
  font-size: 14px;
}

/* Response card border highlights */
.response-card {
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Hover highlight - green for positive votes */
.response-card.vote-highlight-green {
  border-color: #10b981 !important;
  box-shadow: 0 0 0 2px #10b981;
}

/* Hover highlight - red for negative votes */
.response-card.vote-highlight-red {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 2px #ef4444;
}

/* Active/permanent highlight - green */
.response-card.vote-selected-green {
  border-color: #10b981 !important;
  box-shadow: 0 0 0 3px #10b981;
}

/* Active/permanent highlight - red */
.response-card.vote-selected-red {
  border-color: #ef4444 !important;
  box-shadow: 0 0 0 3px #ef4444;
}

/* Discord Promotion Card */
.discord-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-4);
  padding: var(--space-4);
  background: var(--discord-bg);
  border: 1px solid var(--discord-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.discord-card:hover {
  background: rgba(88, 101, 242, 0.15);
  border-color: rgba(88, 101, 242, 0.3);
}

.discord-card .discord-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--discord-color);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.discord-card .discord-icon svg {
  width: 18px;
  height: 18px;
  color: white;
}

.discord-card .discord-content {
  flex: 1;
  min-width: 0;
}

.discord-card .discord-title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--text-primary);
}

.discord-card .discord-subtitle {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

.discord-card .discord-arrow {
  color: var(--text-tertiary);
  transition: transform var(--transition-fast);
}

.discord-card:hover .discord-arrow {
  transform: translateX(2px);
}

.sidebar.collapsed .discord-card {
  display: none;
}

/* Search Conversations Input */
.search-conversations {
  padding: 0 var(--space-4);
  margin-bottom: var(--space-3);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-input-wrapper .search-icon {
  position: absolute;
  left: var(--space-3);
  color: var(--text-muted);
  pointer-events: none;
}

.search-input {
  width: 100%;
  padding: var(--space-3) var(--space-3) var(--space-3) var(--space-10);
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-input:focus {
  background: var(--input-bg-hover);
  border-color: var(--input-border-focus);
  outline: none;
}

.sidebar.collapsed .search-conversations {
  display: none;
}

/* Recent Chats Section */
.recent-chats-section {
  flex: 1;
  margin-top: var(--space-2);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.sidebar.collapsed .recent-chats-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2);
}

.sidebar.collapsed .chat-item {
  justify-content: center;
  padding: var(--space-2);
  background: var(--glass-btn);
  border: 1px solid var(--line);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  margin-bottom: var(--space-2);
}

.sidebar.collapsed .chat-title {
  display: none;
}

.section-title {
  padding: var(--space-2) var(--space-4);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-terra);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-family: var(--font-family-base);
}

.sidebar.collapsed .section-title {
  display: none;
}

.recent-chats-list {
  flex: 1;
  overflow-y: auto;
  padding: 0 var(--space-2);
}

.chat-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: none;
  background: transparent;
  transition: all var(--transition-fast);
  margin-bottom: 2px;
  cursor: pointer;
}

.chat-item:hover {
  background: var(--sidebar-item-hover);
}

.chat-item.active {
  background: var(--sidebar-item-active);
}

.chat-item:active {
  transform: scale(0.98);
}

.chat-icon {
  display: none;
}

.chat-title {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
}

.chat-item:hover .chat-title,
.chat-item.active .chat-title {
  color: var(--text-primary);
}

.chat-item .chat-actions {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

.chat-item:hover .chat-actions {
  display: flex;
}

.chat-item .chat-action-btn {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-xs);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
}

.chat-item .chat-action-btn:hover {
  background: var(--glass-btn-hover);
  color: var(--text-primary);
}

.empty-chats {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) var(--space-5);
  text-align: center;
}

.empty-chats p {
  font-size: var(--text-sm);
  color: var(--text-muted);
  font-family: var(--font-family-base);
}

/* Sidebar Footer - User Profile */
.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--line);
  margin-top: auto;
}

.sidebar.collapsed .sidebar-footer {
  padding: var(--space-3);
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-profile-btn:hover {
  background: var(--sidebar-item-hover);
}

.user-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #e91e63, #9c27b0);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-sm);
  font-weight: 600;
  color: white;
  flex-shrink: 0;
}

.user-info {
  flex: 1;
  text-align: left;
  min-width: 0;
}

.user-name {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-profile-btn .more-icon {
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.sidebar.collapsed .user-info,
.sidebar.collapsed .user-profile-btn .more-icon {
  display: none;
}

.sidebar.collapsed .user-profile-btn {
  justify-content: center;
  padding: var(--space-2);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding-top: var(--space-3);
  margin-top: var(--space-3);
  border-top: 1px solid var(--line-subtle);
}

.sidebar.collapsed .footer-links {
  display: none;
}

.footer-link {
  font-size: 10px;
  color: var(--text-muted);
  font-family: var(--font-family-base);
  font-weight: 400;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.footer-link:hover {
  color: var(--text-secondary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ========================================
   Header Component
   ======================================== */
#header-container {
  height: var(--header-height);
  flex-shrink: 0;
}

.sidebar.collapsed~#header-container {
  left: var(--sidebar-collapsed-width);
}

.main-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-6);
  background: var(--bg-0);
  border-bottom: 1px solid var(--line);
  transition: none;
}

.header-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.header-brand {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-terra);
  letter-spacing: -0.3px;
}

.header-tagline {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 400;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.header-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
}

.header-btn.primary {
  background: var(--glass-btn);
  border: 1px solid var(--line);
  color: var(--text-primary);
}

.header-btn.primary:hover {
  background: var(--glass-btn-hover);
  border-color: var(--line-strong);
}

.mobile-menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  padding: var(--space-2);
  margin-right: var(--space-4);
  border-radius: var(--radius-sm);
  border: var(--border-glass);
  transition: none;
}

.mobile-menu-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.mobile-menu-btn:active {
  transform: none;
}

/* Mode Selector */
.mode-selector {
  position: relative;
}

.mode-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-5);
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}

.mode-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
  transform: translateY(-1px);
}

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

.mode-btn.open {
  background: var(--glass-active);
  border-color: rgba(255, 255, 255, 0.15);
}

.mode-icon,
.mode-option-icon {
  display: flex;
  align-items: center;
  justify-content: center;
}

.mode-text {
  font-size: var(--text-lg);
}

.mode-chevron {
  display: flex;
  align-items: center;
  transition: transform var(--transition-fast);
  opacity: 0.7;
}

.mode-chevron.rotated {
  transform: rotate(180deg);
}

/* Mode Dropdown */
.mode-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  min-width: 280px;
  background: var(--glass-dark);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border: var(--border-glass);
  border-radius: 16px;
  padding: 8px 0;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px) scale(0.95);
  transform-origin: top left;
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

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

.mode-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 12px 16px;
  border-radius: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
}

.mode-option:hover {
  background: rgba(255, 255, 255, 0.08);
}

.mode-option.active {
  background: rgba(255, 255, 255, 0.12);
}

.mode-option:active {
  transform: scale(0.98);
}

.mode-option-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 16px;
}

.mode-option-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.mode-option-title {
  font-size: 16px;
  font-weight: 600;
  color: white;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.mode-option-subtitle {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.mode-option-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: rgba(255, 255, 255, 0.9);
}

.mode-option-divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.08);
  margin: 0;
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-left: auto;
}

.api-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.api-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.api-btn:active {
  transform: scale(0.97);
}

.api-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  transition: all var(--transition-fast);
}

.api-indicator.active {
  background: var(--color-success);
  box-shadow: 0 0 8px var(--color-success), 0 0 16px rgba(74, 222, 128, 0.3);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {

  0%,
  100% {
    box-shadow: 0 0 8px var(--color-success), 0 0 16px rgba(74, 222, 128, 0.3);
  }

  50% {
    box-shadow: 0 0 12px var(--color-success), 0 0 24px rgba(74, 222, 128, 0.4);
  }
}

.api-text {
  font-size: var(--text-sm);
}

.more-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.more-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.more-btn:active {
  transform: scale(0.95);
}

/* User Menu */
.user-menu {
  position: relative;
}

.user-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: 50%;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.user-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.user-btn:active {
  transform: scale(0.95);
}

.user-avatar {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.user-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  margin-top: 8px;
  width: 240px;
  background: var(--glass-dark);
  border: var(--border-glass);
  border-radius: var(--radius-md);
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
}

.user-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: var(--border-glass);
  margin-bottom: 12px;
}

.user-avatar-large {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-cyan), var(--color-teal));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
  font-weight: 600;
  text-transform: uppercase;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  flex-shrink: 0;
}

.user-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.user-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: white;
  margin-bottom: 2px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-email {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.6);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.user-actions {
  display: flex;
  flex-direction: column;
}

.user-action-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-sm);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: left;
  width: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

.user-action-btn:hover {
  background: var(--glass-hover);
  color: white;
}

.user-action-btn:focus {
  outline: none;
  box-shadow: var(--focus-ring);
}

.user-action-btn:active {
  transform: scale(0.98);
}

.user-action-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
}

/* ========================================
   Chat Input Component
   ======================================== */
#chat-input-container {
  width: 100%;
  max-width: var(--input-width);
  padding: var(--space-4) var(--space-6);
  padding-bottom: calc(var(--space-6) + env(safe-area-inset-bottom, 0px));
  margin: 0 auto;
  flex-shrink: 0;
}

.chat-input-wrapper {
  width: 100%;
  margin-left: 0;
  transition: margin-left var(--transition-normal);
}

.chat-input-container {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: var(--space-4) var(--space-5);
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
  animation: fadeInUp 0.3s ease-out forwards;
}

/* Backdrop-filter fallback (keeps premium look without blur support) */
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {

  .sidebar,
  .main-header,
  .mode-dropdown,
  .chat-input-container,
  .glass-panel {
    background: rgba(0, 0, 0, 0.85);
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow-lg);
  }

  .logo-btn,
  .mode-btn,
  .api-btn,
  .more-btn,
  .sidebar-toggle,
  .action-btn,
  .submit-btn,
  .icon-btn {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.12);
  }
}

.chat-input-container:focus-within {
  border-color: var(--input-border-focus);
  box-shadow: var(--shadow-card-hover), 0 0 0 2px var(--input-border-focus);
  transform: translateY(-2px);
}

/* Attachments Preview */
.attachments-preview {
  display: none;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-4);
  border-bottom: var(--border-glass);
}

.attachments-preview.has-items {
  display: flex;
}

.attachment-item {
  position: relative;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: var(--border-glass);
  transition: all var(--transition-fast);
}

.attachment-item:hover {
  border-color: rgba(255, 255, 255, 0.15);
}

.attachment-preview {
  width: 80px;
  height: 80px;
  object-fit: cover;
  display: block;
}

.attachment-file {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
}

.attachment-name {
  font-size: var(--text-xs);
  max-width: 100px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.attachment-remove {
  position: absolute;
  top: var(--space-1);
  right: var(--space-1);
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.8);
  transition: all var(--transition-fast);
}

.attachment-item:hover .attachment-remove {
  opacity: 1;
  transform: scale(1);
}

.attachment-remove:hover {
  background: var(--color-error);
}

/* Input Field */
.input-field-wrapper {
  margin-bottom: var(--space-5);
}

.chat-input {
  width: 100%;
  font-size: var(--text-base);
  font-weight: 400;
  color: var(--text-primary);
  background: transparent;
  line-height: var(--leading-normal);
  caret-color: var(--color-terra);
  resize: none;
  overflow: hidden;
  min-height: 24px;
  max-height: 160px;
  padding: 0;
}

.chat-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

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

.chat-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.left-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.action-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 8px;
  border-radius: 10px;
  border: 1px solid transparent;
  background: transparent;
  transition: all var(--transition-fast);
  opacity: 0.6;
  color: rgba(255, 255, 255, 0.8);
}

.action-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.15);
  opacity: 1;
  transform: scale(1.05);
}

.action-btn:active {
  transform: translateY(0) scale(0.95);
}

.action-btn.active {
  background: var(--color-teal);
  border-color: var(--color-teal);
  opacity: 1;
  box-shadow: 0 0 12px rgba(87, 123, 135, 0.4);
}

.submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--color-terra);
  border: none;
  border-radius: var(--radius-full);
  box-shadow: 0 2px 8px rgba(203, 146, 117, 0.3);
  transition: all var(--transition-normal);
  color: var(--color-white);
}

.submit-btn:hover:not(:disabled) {
  transform: scale(1.08) translateY(-1px);
  background: var(--color-terra-light);
  box-shadow: 0 4px 16px rgba(203, 146, 117, 0.4);
}

.submit-btn:active:not(:disabled) {
  transform: scale(0.95) translateY(0);
}

.submit-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  box-shadow: none;
  background: var(--glass-btn);
}

/* Preference Button - "I prefer this" */
.prefer-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--prefer-btn-bg);
  border: 1px solid var(--prefer-btn-border);
  border-radius: var(--radius-md);
  color: var(--prefer-btn-text);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-normal);
  cursor: pointer;
  transform: translateY(0);
}

.prefer-btn:hover {
  background: var(--prefer-btn-hover-bg);
  border-color: var(--color-terra);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(203, 146, 117, 0.2);
}

.prefer-btn:active {
  transform: translateY(0) scale(0.98);
}

.prefer-btn.selected {
  background: var(--color-terra);
  color: var(--color-white);
  border-color: var(--color-terra);
  box-shadow: 0 4px 16px rgba(203, 146, 117, 0.3);
}

.prefer-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.prefer-btn:hover svg {
  transform: scale(1.1);
}

/* Thumbs down button */
.dislike-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--text-tertiary);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.dislike-btn:hover {
  background: var(--glass-btn-hover);
  color: var(--text-secondary);
  border-color: var(--line-strong);
}

/* Help Actions (Help me choose, Show more responses) */
.help-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.help-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-btn);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.help-btn:hover {
  background: var(--glass-btn-hover);
  color: var(--text-primary);
  border-color: var(--line-strong);
}

.help-btn svg {
  width: 16px;
  height: 16px;
}

/* Tab Navigation (below input) */
.input-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.input-tab {
  padding: var(--space-2) var(--space-4);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  font-weight: 500;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.input-tab:hover {
  background: var(--glass-btn);
  color: var(--text-secondary);
  border-color: var(--line-strong);
}

.input-tab.active {
  background: var(--glass-btn-hover);
  color: var(--text-primary);
  border-color: var(--line-strong);
}

/* Loader */
.loader {
  display: flex;
  align-items: center;
  justify-content: center;
}

.loader-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--color-cyan);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Skeleton Loading State */
.skeleton {
  background: linear-gradient(90deg,
      rgba(255, 255, 255, 0.05) 0%,
      rgba(255, 255, 255, 0.1) 50%,
      rgba(255, 255, 255, 0.05) 100%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

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

  100% {
    background-position: -200% 0;
  }
}

.skeleton-text {
  height: 16px;
  margin-bottom: var(--space-2);
}

.skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

/* ========================================
   Scrollbar Styles
   ======================================== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.2);
}

::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.5);
}

/* ========================================
   Responsive Design
   ======================================== */

/* Tablet */
@media (max-width: 1024px) {
  :root {
    --sidebar-width: 280px;
  }

  .main-wrapper {
    left: 0;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .chat-input-wrapper {
    margin-left: 0;
  }

  #chat-input-container {
    max-width: 100%;
    padding: var(--space-4) var(--space-4);
  }

  /* Premium Shadow adjustments for Tablet */
  .chat-input-container {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
  }
}

/* Mobile */
@media (max-width: 640px) {
  :root {
    --sidebar-width: 100%;
    --header-height: 56px;
    --input-width: 100vw;
    --border-radius: 14px;
  }

  .sidebar {
    width: 88%;
    max-width: 340px;
  }

  .logo-text {
    font-size: 18px;
  }

  .nav-text {
    font-size: 18px;
  }

  .mode-text {
    font-size: 16px;
  }

  .chat-input-container {
    padding: 16px;
  }

  .chat-input {
    font-size: 16px;
    min-height: 44px;
  }

  .left-actions {
    gap: 10px;
  }

  .action-btn {
    min-width: 44px;
    min-height: 44px;
  }

  .submit-btn {
    min-width: 44px;
    min-height: 44px;
  }

  .chat-turn-container {
    padding: 0;
    /* Remove extra padding on mobile */
  }

  /* Adjust direct chat for mobile */
  .direct-bubble {
    max-width: 100%;
    border-radius: 12px;
  }

  /* Adjust response cards for mobile */
  .response-card {
    padding: 14px;
    border-radius: 12px;
  }

  .response-header {
    margin-bottom: var(--space-2);
    padding: 10px;
  }

  .response-actions {
    gap: 8px;
  }

  /* Font size adjustments */
  h1,
  .chat-empty-title {
    font-size: 1.5rem;
  }

  .prompt-text {
    font-size: 1rem;
  }

  .response-body {
    font-size: 0.95rem;
  }

  #chat-input-container {
    padding: var(--space-3) var(--space-4);
    padding-bottom: calc(var(--space-4) + env(safe-area-inset-bottom, 0px));
    max-width: 100%;
  }

  .api-text {
    display: none;
  }

  .header-controls {
    gap: 8px;
  }
}

/* Short height screens (demo killer prevention) */
@media (max-height: 700px) {
  .main-content {
    padding-bottom: var(--space-6);
  }

  .chat-input-container {
    padding: var(--space-3);
  }
}

/* Small Mobile */
@media (max-width: 380px) {
  .mode-text {
    display: none;
  }

  .mode-btn {
    padding: 10px 14px;
  }

  .left-actions {
    gap: 8px;
  }
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden {
  display: none !important;
}

.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;
}

/* Text utilities */
.text-muted {
  opacity: 0.6;
}

.text-sm {
  font-size: var(--text-sm);
}

.text-center {
  text-align: center;
}

/* Flex utilities */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Glass Panel - Reusable */
.glass-panel {
  background: var(--glass-dark);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border: var(--border-glass);
  border-radius: var(--radius-md);
}

/* Icon Button - Reusable */
.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  border: var(--border-glass);
  background: var(--glass-btn);
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.15);
}

.icon-btn:active {
  transform: scale(0.95);
}

.icon-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

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

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

@keyframes slideInLeft {
  from {
    transform: translateX(-20px);
    opacity: 0;
  }

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

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

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

.animate-fade-in {
  animation: fadeIn 0.25s ease forwards;
}

.animate-slide-in {
  animation: slideIn 0.25s ease forwards;
}

.animate-scale-in {
  animation: scaleIn 0.2s ease forwards;
}

/* Staggered animation delays */
.stagger-1 {
  animation-delay: 50ms;
}

.stagger-2 {
  animation-delay: 100ms;
}

.stagger-3 {
  animation-delay: 150ms;
}

.stagger-4 {
  animation-delay: 200ms;
}

.stagger-5 {
  animation-delay: 250ms;
}

/* Tooltip (basic) */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: var(--space-1) var(--space-2);
  background: var(--color-black);
  border: var(--border-glass);
  border-radius: var(--radius-xs);
  font-size: var(--text-xs);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  pointer-events: none;
  z-index: var(--z-toast);
}

[data-tooltip]:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-8px);
}

/* ========================================
   Leaderboard Modal Styles
   ======================================== */

/* Modal Overlay */
.dm-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  z-index: var(--z-overlay);
  animation: fadeIn 0.2s ease;
}

/* Modal Container */
.dm-modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 90%;
  max-width: 900px;
  max-height: 85vh;
  background: var(--glass-dark);
  backdrop-filter: blur(24px) saturate(1.2);
  -webkit-backdrop-filter: blur(24px) saturate(1.2);
  border: var(--border-glass-strong);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: var(--z-modal);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.dm-modal.open {
  animation: scaleIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Modal Header */
.dm-modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6);
  border-bottom: var(--border-glass);
  background: rgba(0, 0, 0, 0.3);
}

.dm-modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-white);
  font-family: 'Do Hyeon', sans-serif;
}

.dm-modal-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.dm-modal-btn {
  padding: var(--space-2) var(--space-4);
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-modal-btn:hover {
  background: var(--glass-hover);
  border-color: rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-glow);
}

.dm-modal-close {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-modal-close:hover {
  background: rgba(239, 68, 68, 0.2);
  border-color: rgba(239, 68, 68, 0.4);
  color: var(--color-error);
}

/* Modal Body */
.dm-modal-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-6);
}

/* Leaderboard Shell */
.dm-lb-shell {
  width: 100%;
}

/* Leaderboard Top Section */
.dm-lb-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.dm-lb-title {
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-white);
  font-family: 'Do Hyeon', sans-serif;
  margin-bottom: var(--space-1);
}

.dm-lb-subtitle {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
}

.dm-lb-refresh {
  padding: var(--space-2) var(--space-4);
  background: var(--color-cyan);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.dm-lb-refresh:hover {
  background: #3a9db3;
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.dm-lb-refresh:active {
  transform: translateY(0);
}

/* Table Wrapper */
.dm-lb-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-md);
  border: var(--border-glass);
  background: rgba(0, 0, 0, 0.3);
}

/* Leaderboard Table */
.dm-lb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}

.dm-lb-table thead {
  background: rgba(0, 0, 0, 0.4);
  border-bottom: var(--border-glass-strong);
}

.dm-lb-table th {
  padding: var(--space-4);
  text-align: left;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.dm-lb-table tbody tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background var(--transition-fast);
}

.dm-lb-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.dm-lb-table tbody tr:last-child {
  border-bottom: none;
}

.dm-lb-table td {
  padding: var(--space-4);
  color: var(--color-white);
}

/* Rank Column */
.dm-lb-rank {
  width: 80px;
}

.dm-lb-rank-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  padding: var(--space-1) var(--space-2);
  background: var(--glass-btn);
  border: var(--border-glass);
  border-radius: var(--radius-xs);
  font-weight: 600;
  font-size: var(--text-sm);
}

/* Medal Ranks */
.dm-lb-rank.rank-1 .dm-lb-rank-pill {
  background: linear-gradient(135deg, #FFD700 0%, #FFA500 100%);
  color: #000;
  border-color: #FFD700;
  box-shadow: 0 0 15px rgba(255, 215, 0, 0.4);
}

.dm-lb-rank.rank-2 .dm-lb-rank-pill {
  background: linear-gradient(135deg, #C0C0C0 0%, #A8A8A8 100%);
  color: #000;
  border-color: #C0C0C0;
  box-shadow: 0 0 15px rgba(192, 192, 192, 0.4);
}

.dm-lb-rank.rank-3 .dm-lb-rank-pill {
  background: linear-gradient(135deg, #CD7F32 0%, #B87333 100%);
  color: #fff;
  border-color: #CD7F32;
  box-shadow: 0 0 15px rgba(205, 127, 50, 0.4);
}

/* Model Info */
.dm-lb-model {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.dm-lb-model-name {
  font-weight: 600;
  color: var(--color-white);
  font-size: var(--text-base);
}

.dm-lb-model-provider {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.5);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Win Rate Pill */
.dm-lb-win-pill {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  background: rgba(74, 171, 194, 0.2);
  border: 1px solid rgba(74, 171, 194, 0.3);
  border-radius: var(--radius-xs);
  color: var(--color-cyan);
  font-weight: 600;
  font-size: var(--text-sm);
}

/* Number Columns */
.dm-lb-num {
  font-variant-numeric: tabular-nums;
  color: rgba(255, 255, 255, 0.9);
}

/* Skeleton Loading */
.dm-lb-row-skel td {
  padding: var(--space-4);
}

.dm-skel {
  height: 16px;
  background: linear-gradient(90deg,
      rgba(255, 255, 255, 0.05) 0%,
      rgba(255, 255, 255, 0.1) 50%,
      rgba(255, 255, 255, 0.05) 100%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s ease-in-out infinite;
  border-radius: var(--radius-xs);
}

.dm-skel.w-30 {
  width: 30%;
}

.dm-skel.w-40 {
  width: 40%;
}

.dm-skel.w-70 {
  width: 70%;
}

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

  100% {
    background-position: -200% 0;
  }
}

/* Empty/Error State */
.dm-lb-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-10);
  text-align: center;
}

.dm-lb-state-title {
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-2);
}

.dm-lb-state-subtitle {
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: var(--space-4);
}

.dm-lb-action {
  padding: var(--space-3) var(--space-6);
  background: var(--color-cyan);
  border: none;
  border-radius: var(--radius-sm);
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.dm-lb-action:hover {
  background: #3a9db3;
  box-shadow: var(--shadow-md);
}

/* Responsive Leaderboard */
@media (max-width: 768px) {
  .dm-modal {
    width: 95%;
    max-height: 90vh;
  }

  .dm-modal-head {
    padding: var(--space-4);
  }

  .dm-modal-body {
    padding: var(--space-4);
  }

  .dm-lb-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .dm-lb-title {
    font-size: var(--text-xl);
  }

  .dm-lb-table {
    font-size: var(--text-xs);
  }

  .dm-lb-table th,
  .dm-lb-table td {
    padding: var(--space-2) var(--space-3);
  }

  .dm-lb-model-name {
    font-size: var(--text-sm);
  }

  .dm-lb-rank {
    width: 60px;
  }
}

@media (max-width: 480px) {
  .dm-modal {
    width: 100%;
    max-height: 100vh;
    border-radius: 0;
  }

  .dm-modal-title {
    font-size: var(--text-lg);
  }

  .dm-lb-table th:nth-child(4),
  .dm-lb-table td:nth-child(4) {
    display: none;
    /* Hide Wins column on very small screens */
  }
}


/* Background Glow Effect - Consistent with Login */
.bg-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, transparent 70%);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 0;
}