/* ==========================================================================
   Nexora AI — Web Application Design System (Claude-Inspired UI)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* --- Root Color Tokens & Themes --- */
:root {
  /* Warm Claude Light Palette */
  --bg-primary: #FAF9F5;
  --bg-secondary: #F3EFEA;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-hover: #ECE7DF;
  --bg-active: #E4DDD3;
  --bg-input: #FFFFFF;
  --bg-code: #F4F1EA;

  /* Borders */
  --border-light: rgba(0, 0, 0, 0.06);
  --border-medium: rgba(0, 0, 0, 0.12);
  --border-strong: rgba(0, 0, 0, 0.20);
  --border-focus: #D97706;

  /* Typography */
  --text-primary: #1F1E1B;
  --text-secondary: #63615A;
  --text-muted: #8F8C84;
  --text-inverted: #FFFFFF;

  /* Claude Warm Terracotta / Amber Brand Accents */
  --accent-primary: #D97706;      /* Rich Claude Amber */
  --accent-hover: #B45309;
  --accent-subtle: #FEF3C7;
  --accent-glow: rgba(217, 119, 6, 0.25);
  --accent-secondary: #C2410C;    /* Terracotta Red-Orange */
  --accent-purple: #7C3AED;       /* AI sparkle nuance */

  /* Status Colors */
  --color-success: #15803D;
  --color-success-bg: #DCFCE7;
  --color-warning: #B45309;
  --color-warning-bg: #FEF3C7;
  --color-error: #B91C1C;
  --color-error-bg: #FEE2E2;
  --color-info: #0369A1;
  --color-info-bg: #E0F2FE;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
  --shadow-popup: 0 20px 48px rgba(0, 0, 0, 0.16);
  --shadow-input: 0 2px 8px rgba(0, 0, 0, 0.04), 0 0 0 1px var(--border-medium);
  --shadow-input-focus: 0 4px 16px rgba(217, 119, 6, 0.15), 0 0 0 2px var(--accent-primary);

  /* Dimensions & Radius */
  --sidebar-width: 280px;
  --sidebar-collapsed-width: 0px;
  --header-height: 60px;
  --max-content-width: 860px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-pill: 9999px;

  /* Typography Fonts */
  --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 240ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 350ms cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* --- Dark Theme Tokens --- */
[data-theme="dark"] {
  --bg-primary: #121211;
  --bg-secondary: #1A1A19;
  --bg-surface: #212120;
  --bg-elevated: #2A2A28;
  --bg-hover: #2E2E2C;
  --bg-active: #373734;
  --bg-input: #1F1F1E;
  --bg-code: #181817;

  --border-light: rgba(255, 255, 255, 0.06);
  --border-medium: rgba(255, 255, 255, 0.10);
  --border-strong: rgba(255, 255, 255, 0.20);
  --border-focus: #F59E0B;

  --text-primary: #F5F5F0;
  --text-secondary: #A6A49E;
  --text-muted: #73716B;
  --text-inverted: #121211;

  --accent-primary: #F59E0B;
  --accent-hover: #D97706;
  --accent-subtle: rgba(245, 158, 11, 0.15);
  --accent-glow: rgba(245, 158, 11, 0.35);
  --accent-secondary: #EA580C;

  --color-success: #4ADE80;
  --color-success-bg: rgba(74, 222, 128, 0.12);
  --color-warning: #FBBF24;
  --color-warning-bg: rgba(251, 191, 36, 0.12);
  --color-error: #F87171;
  --color-error-bg: rgba(248, 113, 113, 0.12);
  --color-info: #38BDF8;
  --color-info-bg: rgba(56, 189, 248, 0.12);

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  --shadow-popup: 0 24px 60px rgba(0, 0, 0, 0.7);
  --shadow-input: 0 2px 8px rgba(0, 0, 0, 0.2), 0 0 0 1px var(--border-medium);
  --shadow-input-focus: 0 4px 20px rgba(245, 158, 11, 0.2), 0 0 0 2px var(--accent-primary);
}

/* --- Base Resets & Global Styles --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  width: 100%;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

a:hover {
  text-decoration: underline;
  color: var(--accent-hover);
}

/* --- Layout Structure --- */
.app-container {
  display: flex;
  height: 100vh;
  width: 100vw;
  position: relative;
  background-color: var(--bg-primary);
}

/* --- Left Sidebar (Claude Style) --- */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  background-color: var(--bg-secondary);
  border-right: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition-normal), width var(--transition-normal);
  z-index: 50;
  flex-shrink: 0;
  overflow: hidden;
}

.sidebar.collapsed {
  transform: translateX(-100%);
  width: 0;
  border-right: none;
}

.sidebar-header {
  padding: 18px 16px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #D97706, #EA580C);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px var(--accent-glow);
  color: #FFFFFF;
}

.brand-title-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.brand-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.brand-badge {
  font-size: 0.68rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-pill);
  background: var(--accent-subtle);
  color: var(--accent-primary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.sidebar-toggle-btn {
  padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

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

/* Sidebar Action: New Chat Button (Prominent Claude-style Pill) */
.sidebar-action-area {
  padding: 8px 16px 12px;
}

.btn-new-chat {
  width: 100%;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-weight: 500;
  font-size: 0.92rem;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.btn-new-chat:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-new-chat-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn-new-chat-icon {
  color: var(--accent-primary);
  display: flex;
}

.keyboard-shortcut {
  font-size: 0.72rem;
  color: var(--text-muted);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 1px 5px;
  font-family: var(--font-mono);
}

/* Quick Tools Navigation */
.quick-tools-nav {
  padding: 4px 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  border-bottom: 1px solid var(--border-light);
}

.nav-item-btn {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.88rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  text-align: left;
}

.nav-item-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item-btn.active {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  font-weight: 600;
}

.nav-item-icon {
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* Chat History List */
.sidebar-history-container {
  flex: 1;
  overflow-y: auto;
  padding: 8px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-history-container::-webkit-scrollbar {
  width: 4px;
}

.sidebar-history-container::-webkit-scrollbar-thumb {
  background-color: var(--border-medium);
  border-radius: 4px;
}

.history-section-group {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.history-section-title {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 6px 10px 4px;
}

.chat-history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 10px;
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  font-size: 0.86rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.chat-history-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.chat-history-item.active {
  background-color: var(--bg-active);
  color: var(--text-primary);
  font-weight: 500;
}

.chat-item-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  padding-right: 6px;
}

.chat-item-actions {
  display: none;
  align-items: center;
  gap: 2px;
}

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

.chat-action-btn {
  padding: 3px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  display: flex;
}

.chat-action-btn:hover {
  color: var(--color-error);
  background-color: var(--bg-surface);
}

/* Sidebar Footer / User Profile */
.sidebar-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background-color: var(--bg-secondary);
}

.user-profile-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 4px 6px;
  border-radius: var(--radius-md);
  flex: 1;
  overflow: hidden;
  transition: background-color var(--transition-fast);
}

.user-profile-btn:hover {
  background-color: var(--bg-hover);
}

.user-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  color: #FFFFFF;
  font-size: 0.76rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.user-info {
  display: flex;
  flex-direction: column;
  text-align: left;
  overflow: hidden;
}

.user-name {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.user-status {
  font-size: 0.72rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
}

.status-dot-mini {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #22C55E;
}

.footer-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

.footer-btn {
  padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
  transition: all var(--transition-fast);
}

.footer-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

/* --- Main Chat Stage --- */
.main-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  background-color: var(--bg-primary);
  position: relative;
  overflow: hidden;
}

/* Top App Header */
.app-header {
  height: var(--header-height);
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-light);
  background-color: rgba(250, 249, 245, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 30;
}

[data-theme="dark"] .app-header {
  background-color: rgba(18, 18, 17, 0.85);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.header-toggle-sidebar {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 7px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.header-toggle-sidebar:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

/* Model Intelligence Selector Pill (Claude Style) */
.model-selector-pill {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.model-selector-pill:hover {
  border-color: var(--border-strong);
  background-color: var(--bg-hover);
}

.model-indicator-spark {
  color: var(--accent-primary);
  display: flex;
}

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 500;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.header-pill-btn:hover {
  color: var(--text-primary);
  border-color: var(--accent-primary);
  background-color: var(--bg-hover);
}

.header-pill-btn.primary {
  background: linear-gradient(135deg, #D97706, #EA580C);
  border-color: transparent;
  color: #FFFFFF;
}

.header-pill-btn.primary:hover {
  opacity: 0.92;
  box-shadow: 0 2px 10px var(--accent-glow);
}

/* Chat Messages Scroll Canvas */
.chat-scroll-area {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 24px 20px 140px;
  display: flex;
  flex-direction: column;
  align-items: center;
  scroll-behavior: smooth;
}

.chat-scroll-area::-webkit-scrollbar {
  width: 6px;
}

.chat-scroll-area::-webkit-scrollbar-thumb {
  background-color: var(--border-medium);
  border-radius: 4px;
}

.chat-content-constrained {
  width: 100%;
  max-width: var(--max-content-width);
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* --- Hero Welcome State (Claude Style) --- */
.hero-welcome-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 40px 16px 20px;
  margin: auto 0;
  width: 100%;
  animation: fadeIn 300ms ease-out;
}

.hero-avatar-sparkle {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background: linear-gradient(135deg, #D97706, #C2410C);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  margin-bottom: 20px;
  box-shadow: 0 8px 24px var(--accent-glow);
}

.hero-greeting-title {
  font-family: var(--font-display);
  font-size: 2.1rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.hero-greeting-sub {
  font-size: 1.02rem;
  color: var(--text-secondary);
  max-width: 580px;
  line-height: 1.5;
  margin-bottom: 36px;
}

/* Suggestion Prompt Cards Grid */
.starter-prompts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 720px;
}

.starter-card {
  padding: 14px 16px;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: 12px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.starter-card:hover {
  border-color: var(--accent-primary);
  background-color: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.starter-card-icon {
  font-size: 1.25rem;
  padding: 6px;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  flex-shrink: 0;
  display: flex;
}

.starter-card-texts {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.starter-card-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
}

.starter-card-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* --- Message Bubbles & Turns --- */
.message-turn {
  display: flex;
  flex-direction: column;
  width: 100%;
  animation: slideUp 200ms ease-out;
}

/* User Message */
.message-turn.user {
  align-items: flex-end;
}

.user-bubble-wrapper {
  max-width: 82%;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
}

.user-bubble {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg) var(--radius-lg) 4px var(--radius-lg);
  padding: 12px 18px;
  color: var(--text-primary);
  font-size: 0.96rem;
  line-height: 1.55;
  box-shadow: var(--shadow-sm);
  white-space: pre-wrap;
  word-break: break-word;
}

[data-theme="dark"] .user-bubble {
  background-color: var(--bg-surface);
}

.message-time {
  font-size: 0.72rem;
  color: var(--text-muted);
  padding: 0 4px;
}

/* Assistant Message */
.message-turn.assistant {
  align-items: flex-start;
}

.assistant-wrapper {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.assistant-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #D97706, #EA580C);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 4px;
  box-shadow: 0 2px 8px var(--accent-glow);
}

.assistant-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Collapsible Thought Process Accordion (Claude / Reasoning style) */
.thought-accordion {
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  overflow: hidden;
  margin-bottom: 4px;
}

.thought-header {
  padding: 8px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-weight: 500;
  user-select: none;
}

.thought-header:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.thought-title-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.thought-pulse-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  animation: pulse 1.5s infinite;
}

.thought-content {
  padding: 10px 12px;
  border-top: 1px solid var(--border-light);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  line-height: 1.5;
  background-color: var(--bg-code);
  max-height: 180px;
  overflow-y: auto;
}

/* Assistant Markdown Formatted Prose */
.assistant-prose {
  color: var(--text-primary);
  font-size: 0.96rem;
  line-height: 1.65;
  word-break: break-word;
}

.assistant-prose p {
  margin-bottom: 12px;
}

.assistant-prose p:last-child {
  margin-bottom: 0;
}

.assistant-prose h1,
.assistant-prose h2,
.assistant-prose h3 {
  font-family: var(--font-display);
  color: var(--text-primary);
  font-weight: 600;
  margin: 18px 0 8px;
}

.assistant-prose h1 { font-size: 1.35rem; }
.assistant-prose h2 { font-size: 1.18rem; }
.assistant-prose h3 { font-size: 1.05rem; }

.assistant-prose ul, 
.assistant-prose ol {
  margin: 8px 0 14px 20px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.assistant-prose li {
  line-height: 1.55;
}

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

.assistant-prose blockquote {
  border-left: 3px solid var(--accent-primary);
  padding: 6px 14px;
  margin: 12px 0;
  background-color: var(--accent-subtle);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.92rem;
}

/* Tables */
.assistant-prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 14px 0;
  font-size: 0.88rem;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.assistant-prose th,
.assistant-prose td {
  padding: 9px 12px;
  border: 1px solid var(--border-light);
  text-align: left;
}

.assistant-prose th {
  background-color: var(--bg-secondary);
  font-weight: 600;
}

.assistant-prose tr:nth-child(even) td {
  background-color: var(--bg-secondary);
}

/* Code Blocks & Inline Code */
.assistant-prose code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  background-color: var(--bg-code);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
}

.code-block-container {
  margin: 14px 0;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-code);
  overflow: hidden;
}

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border-light);
  font-size: 0.74rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.btn-copy-code {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.72rem;
  color: var(--text-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
}

.btn-copy-code:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.code-block-container pre {
  padding: 14px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  line-height: 1.5;
}

.code-block-container pre code {
  background: none;
  border: none;
  padding: 0;
}

/* --- Verified Grounded Sources Cards --- */
.verified-sources-box {
  margin-top: 10px;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sources-box-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.76rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.sources-cards-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.source-item-card {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  font-size: 0.8rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
  max-width: 100%;
}

.source-item-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.source-badge-tag {
  font-size: 0.68rem;
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  background-color: var(--color-success-bg);
  color: var(--color-success);
  font-weight: 600;
}

.source-btn-action {
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  cursor: pointer;
}

.source-btn-action:hover {
  color: var(--accent-hover);
}

/* Assistant Message Action Toolbar */
.message-actions-toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-top: 4px;
}

.action-icon-btn {
  padding: 5px 8px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.74rem;
  transition: all var(--transition-fast);
}

.action-icon-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.action-icon-btn.active {
  color: var(--accent-primary);
}

/* Typing / Generating Indicator */
.typing-dots-indicator {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 12px;
}

.typing-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  animation: typingBounce 1.4s infinite ease-in-out both;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }

/* --- Fixed Floating Input Dock (Claude Style) --- */
.chat-input-dock {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px 20px 20px;
  background: linear-gradient(180deg, rgba(250, 249, 245, 0) 0%, rgba(250, 249, 245, 0.95) 30%, rgba(250, 249, 245, 1) 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 25;
  pointer-events: none;
}

[data-theme="dark"] .chat-input-dock {
  background: linear-gradient(180deg, rgba(18, 18, 17, 0) 0%, rgba(18, 18, 17, 0.95) 30%, rgba(18, 18, 17, 1) 100%);
}

.input-box-wrapper {
  width: 100%;
  max-width: var(--max-content-width);
  background-color: var(--bg-input);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-md);
  padding: 10px 14px 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: all var(--transition-fast);
  pointer-events: auto;
}

.input-box-wrapper:focus-within {
  box-shadow: var(--shadow-input-focus);
  border-color: var(--border-focus);
}

/* Attachment Chip Preview */
.attachment-preview-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding-bottom: 4px;
}

.file-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  font-size: 0.78rem;
  color: var(--text-primary);
}

.file-chip-remove {
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
}

.file-chip-remove:hover {
  color: var(--color-error);
}

/* Prompt Textarea */
.chat-textarea {
  width: 100%;
  min-height: 24px;
  max-height: 180px;
  resize: none;
  background: transparent;
  border: none;
  outline: none;
  font-size: 0.96rem;
  line-height: 1.5;
  color: var(--text-primary);
  font-family: var(--font-body);
}

.chat-textarea::placeholder {
  color: var(--text-muted);
}

/* Prompt Bottom Controls */
.input-controls-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 2px;
}

.input-features-left {
  display: flex;
  align-items: center;
  gap: 6px;
}

.feature-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 8px;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-secondary);
  background-color: transparent;
  border: 1px solid transparent;
  transition: all var(--transition-fast);
}

.feature-pill-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.feature-pill-btn.active {
  background-color: var(--accent-subtle);
  color: var(--accent-primary);
  border-color: var(--accent-primary);
}

.input-actions-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

.icon-trigger-btn {
  padding: 6px;
  border-radius: 50%;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.icon-trigger-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.icon-trigger-btn.recording {
  color: var(--color-error);
  animation: pulse 1s infinite;
}

/* Send Button (Warm Amber Pill Arrow) */
.btn-send-message {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background-color: var(--accent-primary);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 6px var(--accent-glow);
}

.btn-send-message:disabled {
  background-color: var(--border-medium);
  color: var(--text-muted);
  box-shadow: none;
  cursor: not-allowed;
  opacity: 0.7;
}

.btn-send-message:not(:disabled):hover {
  background-color: var(--accent-hover);
  transform: scale(1.05);
}

.input-disclaimer-text {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 8px;
  text-align: center;
  pointer-events: auto;
}

/* --- Modals & Overlays --- */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-normal);
  padding: 20px;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-dialog {
  width: 100%;
  max-width: 600px;
  max-height: 85vh;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-popup);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(16px) scale(0.98);
  transition: transform var(--transition-spring);
}

.modal-backdrop.open .modal-dialog {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 16px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-light);
}

.modal-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.modal-close-btn {
  padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  display: flex;
}

.modal-close-btn:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: 20px;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

/* Modal Tab Controls */
.modal-tabs {
  display: flex;
  border-bottom: 1px solid var(--border-light);
  gap: 8px;
  margin-bottom: 6px;
}

.modal-tab-btn {
  padding: 8px 12px;
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

.modal-tab-btn:hover {
  color: var(--text-primary);
}

.modal-tab-btn.active {
  color: var(--accent-primary);
  border-bottom-color: var(--accent-primary);
}

/* Form Groups */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 9px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-input);
  color: var(--text-primary);
  outline: none;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 2px var(--accent-subtle);
}

.modal-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border-light);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  background-color: var(--bg-secondary);
}

.btn-secondary {
  padding: 8px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.88rem;
  background-color: var(--bg-surface);
}

.btn-secondary:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}

.btn-primary {
  padding: 8px 16px;
  border-radius: var(--radius-md);
  background-color: var(--accent-primary);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.88rem;
  transition: all var(--transition-fast);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  box-shadow: 0 2px 8px var(--accent-glow);
}

/* Student Portal Dashboard Stats Cards */
.portal-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.stat-metric-card {
  padding: 12px;
  border-radius: var(--radius-md);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-light);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-metric-title {
  font-size: 0.74rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.stat-metric-value {
  font-size: 1.45rem;
  font-weight: 700;
  font-family: var(--font-display);
  color: var(--text-primary);
}

.stat-metric-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 1px 6px;
  border-radius: var(--radius-pill);
  display: inline-block;
  align-self: flex-start;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  z-index: 200;
}

.toast-item {
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-medium);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 200ms ease-out;
}

.toast-item.success { border-left: 4px solid var(--color-success); }
.toast-item.error { border-left: 4px solid var(--color-error); }
.toast-item.info { border-left: 4px solid var(--accent-primary); }

/* --- Keyframe Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

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

@keyframes slideInRight {
  from { opacity: 0; transform: translateX(20px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes typingBounce {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40% { transform: scale(1); opacity: 1; }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

/* --- Responsive Media Queries --- */
@media (max-width: 768px) {
  .sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    width: 280px;
    z-index: 90;
    box-shadow: var(--shadow-lg);
  }

  .starter-prompts-grid {
    grid-template-columns: 1fr;
  }

  .portal-stats-grid {
    grid-template-columns: 1fr;
  }

  .hero-greeting-title {
    font-size: 1.6rem;
  }

  .chat-scroll-area {
    padding-bottom: 160px;
  }
}

/* ==========================================================================
   Screen Management & Multi-Screen Routing (Figma & Claude Specs)
   ========================================================================== */
#screenContainer {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  position: relative;
  overflow: hidden;
}

.app-screen {
  display: none;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  opacity: 0;
  transition: opacity var(--transition-normal) ease;
}

.app-screen.active {
  display: flex;
  flex-direction: column;
  opacity: 1;
  animation: screenFadeIn 260ms cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* Auth and Onboarding screens must scroll smoothly on any laptop/mobile viewport */
.app-screen:not(.app-screen-chat) {
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

.app-screen:not(.app-screen-chat)::-webkit-scrollbar {
  width: 6px;
}

.app-screen:not(.app-screen-chat)::-webkit-scrollbar-thumb {
  background-color: var(--border-medium);
  border-radius: 6px;
}

.app-screen-chat.active {
  display: block;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

@keyframes screenFadeIn {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Common Auth / Screen Layout --- */
.auth-screen-layout {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  min-height: 100%;
  width: 100%;
  padding: 36px 16px;
  box-sizing: border-box;
  margin: auto 0; /* Auto margin centers when fits, starts at top when taller */
  background-color: var(--bg-primary);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(217, 119, 6, 0.08) 0%, transparent 60%),
    radial-gradient(circle at 10% 90%, rgba(194, 65, 12, 0.04) 0%, transparent 45%);
}

.auth-card {
  width: 100%;
  max-width: 470px;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  box-shadow: var(--shadow-lg);
  position: relative;
  transition: box-shadow var(--transition-normal);
  margin: 0 auto;
  box-sizing: border-box;
}

.auth-card-wide {
  max-width: 580px;
}

.auth-header {
  text-align: center;
  margin-bottom: 22px;
}

.auth-brand-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 12px;
}

.auth-title {
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.auth-subtitle {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
  max-width: 380px;
  margin: 0 auto;
}

/* --- Onboarding Specific --- */
.onboarding-card {
  max-width: 490px;
  text-align: center;
  padding: 30px 24px;
}

.onboarding-emblem-wrap {
  width: 92px;
  height: 92px;
  margin: 0 auto 16px auto;
  border-radius: 22px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-medium);
  box-shadow: 0 8px 24px rgba(217, 119, 6, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 8px;
  position: relative;
}

.onboarding-emblem-wrap img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 18px;
}

.onboarding-features {
  display: flex;
  flex-direction: column;
  gap: 9px;
  margin: 18px 0 24px 0;
  text-align: left;
}

.onboarding-feature-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.onboarding-feature-item:hover {
  transform: translateY(-1px);
  border-color: var(--accent-subtle);
}

.feature-icon-badge {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
  box-shadow: var(--shadow-sm);
}

.feature-item-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.feature-item-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.feature-item-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

/* --- Forms & Inputs --- */
.auth-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.auth-form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  text-align: left;
}

.auth-form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.auth-form-label-tag {
  font-size: 0.72rem;
  color: var(--accent-primary);
  font-weight: 500;
}

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

.auth-form-input {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-medium);
  background-color: var(--bg-input);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.92rem;
  transition: all var(--transition-fast);
  outline: none;
}

.auth-form-input:focus {
  border-color: var(--border-focus);
  box-shadow: var(--shadow-input-focus);
}

.auth-form-input.input-has-icon {
  padding-right: 42px;
}

.auth-input-icon-btn {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.auth-input-icon-btn:hover {
  color: var(--text-primary);
}

.auth-field-error {
  font-size: 0.76rem;
  color: var(--color-error);
  font-weight: 500;
  display: none;
  margin-top: 3px;
}

.auth-field-error.visible {
  display: block;
  animation: slideUp 150ms ease-out;
}

.auth-options-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  margin-top: -4px;
  margin-bottom: 4px;
}

.auth-checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  color: var(--text-secondary);
}

.auth-checkbox-label input[type="checkbox"] {
  accent-color: var(--accent-primary);
  cursor: pointer;
}

.auth-text-link {
  color: var(--accent-primary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast);
  cursor: pointer;
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
}

.auth-text-link:hover {
  color: var(--accent-hover);
  text-decoration: underline;
}

/* --- Buttons --- */
.btn-auth-primary {
  width: 100%;
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  background-color: var(--accent-primary);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 0.95rem;
  font-family: var(--font-body);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--transition-fast);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-auth-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px var(--accent-glow);
}

.btn-auth-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-auth-google {
  width: 100%;
  padding: 11px 20px;
  border-radius: var(--radius-pill);
  background-color: var(--bg-surface);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 0.9rem;
  font-family: var(--font-body);
  border: 1px solid var(--border-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: all var(--transition-fast);
}

.btn-auth-google:hover {
  background-color: var(--bg-hover);
  border-color: var(--border-strong);
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  color: var(--text-muted);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--border-light);
}

.auth-footer-prompt {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 22px;
}

/* Quick Demo Account Selector Chip */
.demo-pill-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px dashed var(--accent-primary);
  color: var(--accent-primary);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: 6px;
}

.demo-pill-btn:hover {
  background: var(--accent-subtle);
  transform: translateY(-1px);
}

/* --- Verify Email Screen Styles --- */
.verify-icon-box {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  background: var(--accent-subtle);
  color: var(--accent-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px auto;
  font-size: 2rem;
}

.email-highlight-badge {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--accent-primary);
  margin: 12px 0;
}

.verify-notice-box {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border-left: 4px solid var(--accent-primary);
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 24px;
  text-align: left;
}

.verify-actions-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* --- Class Setup / BVC Portal Connection Screen --- */
.portal-connect-box {
  padding: 16px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  margin-bottom: 20px;
  text-align: left;
}

.verified-student-card {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  background: var(--color-success-bg);
  border: 1px solid rgba(21, 128, 61, 0.25);
  margin: 20px 0;
  text-align: left;
  animation: slideUp 200ms ease-out;
}

.verified-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(21, 128, 61, 0.18);
}

.verified-card-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--color-success);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.verified-details-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.verified-detail-row {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.detail-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
}

.detail-value {
  font-size: 0.88rem;
  color: var(--text-primary);
  font-weight: 600;
}

/* --- Terms Screen Styles --- */
.terms-scroll-area {
  max-height: 280px;
  overflow-y: auto;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.6;
  text-align: left;
  margin: 20px 0;
}

.terms-scroll-area h4 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 14px;
  margin-bottom: 4px;
}

.terms-scroll-area h4:first-child {
  margin-top: 0;
}

.terms-scroll-area p {
  margin-bottom: 10px;
}

/* User Menu & Logout Button in Chat */
.user-menu-dropdown {
  position: relative;
}

.btn-signout-mini {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid var(--border-medium);
  color: var(--color-error);
  font-size: 0.76rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-signout-mini:hover {
  background: var(--color-error-bg);
  border-color: var(--color-error);
}

/* Loading Spinner */
.spinner-mini {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: #FFFFFF;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* ==========================================================================
   Comprehensive Mobile & Desktop Responsiveness (Figma Screens Spec)
   ========================================================================== */

/* Mobile Phones (Portrait & Small Screens <= 640px) */
@media (max-width: 640px) {
  .auth-screen-layout {
    padding: 20px 12px;
  }

  .auth-card {
    padding: 24px 18px;
    border-radius: 18px;
    max-width: 100%;
  }

  .onboarding-card {
    padding: 24px 16px;
  }

  .onboarding-emblem-wrap {
    width: 78px;
    height: 78px;
    border-radius: 18px;
    margin-bottom: 12px;
    padding: 6px;
  }

  .auth-brand-badge {
    padding: 4px 10px;
    font-size: 0.72rem;
    margin-bottom: 10px;
  }

  .auth-title {
    font-size: 1.45rem;
    margin-bottom: 4px;
  }

  .auth-subtitle {
    font-size: 0.82rem;
    line-height: 1.4;
  }

  .onboarding-features {
    margin: 14px 0 20px 0;
    gap: 8px;
  }

  .onboarding-feature-item {
    padding: 9px 10px;
    gap: 10px;
  }

  .feature-icon-badge {
    width: 28px;
    height: 28px;
    font-size: 0.95rem;
  }

  .feature-item-title {
    font-size: 0.82rem;
  }

  .feature-item-desc {
    font-size: 0.75rem;
    line-height: 1.35;
  }

  .btn-auth-primary,
  .btn-auth-google {
    padding: 12px 16px;
    font-size: 0.9rem;
  }

  .auth-form {
    gap: 12px;
  }

  .auth-form-input {
    padding: 10px 12px;
    font-size: 0.88rem;
  }

  .verified-details-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .terms-scroll-area {
    max-height: 200px;
    padding: 12px 14px;
    font-size: 0.8rem;
  }

  .modal-dialog {
    max-height: 90vh;
    border-radius: var(--radius-lg);
  }

  .app-header {
    padding: 0 12px;
  }

  .model-selector-pill {
    padding: 5px 8px;
    font-size: 0.8rem;
  }

  #headerAuthBadge {
    display: none !important;
  }
}

/* Tablet & Smaller Laptops (<= 1024px) */
@media (max-width: 1024px) {
  .auth-card-wide {
    max-width: 520px;
  }
}

/* Short Viewports (Laptops 1366x768, Zoomed In, Mobile Landscape) */
@media (max-height: 720px) {
  .auth-screen-layout {
    padding: 18px 14px;
  }

  .auth-card {
    padding: 24px 22px;
  }

  .onboarding-card {
    padding: 22px 20px;
  }

  .onboarding-emblem-wrap {
    width: 72px;
    height: 72px;
    margin-bottom: 10px;
  }

  .auth-header {
    margin-bottom: 14px;
  }

  .auth-title {
    font-size: 1.4rem;
    margin-bottom: 4px;
  }

  .onboarding-features {
    margin: 12px 0 16px 0;
    gap: 7px;
  }

  .onboarding-feature-item {
    padding: 8px 10px;
  }

  .auth-form {
    gap: 10px;
  }
}