/* ══════════════════════════════════════════════════════════════════════
   Kobo Vocab — Premium Dark-Mode Design System
   ══════════════════════════════════════════════════════════════════════ */

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

/* ── CSS Variables / Design Tokens ─────────────────────────────────── */
:root {
  /* Background layers */
  --bg-deep: #0a0e1a;
  --bg-base: #111827;
  --bg-surface: #1e2538;
  --bg-elevated: #2a3349;
  --bg-hover: #333d55;

  /* Text */
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  /* Accent — warm amber/gold */
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --accent-glow: rgba(245, 158, 11, 0.15);
  --accent-text: #0a0e1a;

  /* Semantic colors */
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --info: #3b82f6;
  --info-bg: rgba(59, 130, 246, 0.12);

  /* Rating button colors */
  --rating-again: #ef4444;
  --rating-hard: #f97316;
  --rating-good: #10b981;
  --rating-easy: #06b6d4;

  /* Glass */
  --glass-bg: rgba(30, 37, 56, 0.7);
  --glass-border: rgba(148, 163, 184, 0.1);
  --glass-blur: 20px;

  /* Sizing */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px var(--accent-glow);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Layout */
  --max-width: 480px;
  --nav-height: 64px;
  --header-height: 56px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-deep);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100dvh;
  overflow-x: hidden;
  padding-bottom: calc(var(--nav-height) + env(safe-area-inset-bottom, 0px));
}

/* Subtle gradient background */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(245, 158, 11, 0.06), transparent),
    radial-gradient(ellipse 60% 40% at 80% 100%, rgba(59, 130, 246, 0.04), transparent);
  pointer-events: none;
  z-index: 0;
}

/* ── App Container ─────────────────────────────────────────────────── */
.app {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 16px;
}

/* ── Header ────────────────────────────────────────────────────────── */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 4px;
  background: rgba(10, 14, 26, 0.85);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  margin: 0 -16px;
  padding: 0 20px;
}

.header-title {
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
}

.header-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* ── Bottom Navigation ─────────────────────────────────────────────── */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  background: rgba(10, 14, 26, 0.92);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-top: 1px solid var(--glass-border);
  padding-bottom: env(safe-area-inset-bottom, 0px);
}

.bottom-nav-inner {
  display: flex;
  max-width: var(--max-width);
  width: 100%;
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 0 6px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.625rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  cursor: pointer;
  transition: color var(--duration-fast) ease;
  -webkit-tap-highlight-color: transparent;
  position: relative;
}

.nav-tab svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.8;
  transition: transform var(--duration-fast) var(--ease-spring);
}

.nav-tab.active {
  color: var(--accent);
}

.nav-tab.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 0 0 2px 2px;
}

.nav-tab:active svg {
  transform: scale(0.9);
}

/* ── Views ─────────────────────────────────────────────────────────── */
.view {
  display: none;
  padding: 20px 0;
  animation: fadeInUp var(--duration-normal) var(--ease-out);
}

.view.active {
  display: block;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Flashcard ─────────────────────────────────────────────────────── */
.card-container {
  perspective: 1000px;
  margin: 16px 0;
}

.flashcard {
  position: relative;
  width: 100%;
  min-height: 280px;
  cursor: pointer;
  transform-style: preserve-3d;
  transition: transform 0.5s var(--ease-out);
  -webkit-tap-highlight-color: transparent;
}

.flashcard.flipped {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  min-height: 280px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--shadow-lg);
}

.flashcard-front {
  align-items: center;
  justify-content: center;
  text-align: center;
}

.flashcard-back {
  transform: rotateY(180deg);
  overflow-y: auto;
  max-height: 55vh;
}

.card-word {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-hover));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.card-phonetic {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.card-tap-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: auto;
  padding-top: 16px;
}

.card-book-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--info-bg);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--info);
  margin-bottom: 16px;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-audio-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--accent);
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  margin-left: 8px;
  flex-shrink: 0;
}

.card-audio-btn:hover {
  background: rgba(245, 158, 11, 0.25);
  transform: scale(1.05);
}

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

/* Back of card */
.card-back-word {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 4px;
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.card-back-phonetic {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.card-meaning {
  margin-bottom: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--accent);
}

.card-pos {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 4px;
}

.card-definition {
  font-size: 0.95rem;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 4px;
}

.card-example {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  line-height: 1.4;
}

.card-synonyms {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 6px;
}

.synonym-chip {
  padding: 2px 8px;
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  color: var(--text-secondary);
}

/* ── Rating Buttons ────────────────────────────────────────────────── */
.rating-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-top: 16px;
}

.rating-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 12px 4px 10px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-spring);
  -webkit-tap-highlight-color: transparent;
}

.rating-btn:active {
  transform: scale(0.93);
}

.rating-label {
  font-size: 0.8rem;
  font-weight: 600;
}

.rating-interval {
  font-size: 0.65rem;
  opacity: 0.7;
}

.rating-btn.again {
  background: var(--danger-bg);
  color: var(--rating-again);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.rating-btn.hard {
  background: var(--warning-bg);
  color: var(--rating-hard);
  border: 1px solid rgba(249, 115, 22, 0.2);
}

.rating-btn.good {
  background: var(--success-bg);
  color: var(--rating-good);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.rating-btn.easy {
  background: rgba(6, 182, 212, 0.12);
  color: var(--rating-easy);
  border: 1px solid rgba(6, 182, 212, 0.2);
}

/* ── Stats Bar ─────────────────────────────────────────────────────── */
.stats-bar {
  display: flex;
  gap: 12px;
  margin-bottom: 20px;
}

.stat-card {
  flex: 1;
  padding: 12px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  text-align: center;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-value.accent { color: var(--accent); }
.stat-value.success { color: var(--success); }
.stat-value.info { color: var(--info); }

.stat-label {
  font-size: 0.65rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Progress ring ─────────────────────────────────────────────────── */
.session-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

.progress-text {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.progress-bar-track {
  width: 100%;
  height: 4px;
  background: var(--bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hover));
  border-radius: var(--radius-full);
  transition: width var(--duration-normal) var(--ease-out);
}

/* ── Session Summary ───────────────────────────────────────────────── */
.session-summary {
  text-align: center;
  padding: 40px 20px;
}

.summary-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.summary-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
  background: linear-gradient(135deg, var(--success), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.summary-subtitle {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

.summary-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

/* ── Empty State ───────────────────────────────────────────────────── */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 16px;
  opacity: 0.6;
}

.empty-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.empty-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  max-width: 280px;
  margin: 0 auto;
  line-height: 1.5;
}

/* ── Browse View ───────────────────────────────────────────────────── */
.search-container {
  position: relative;
  margin-bottom: 16px;
}

.search-input {
  width: 100%;
  padding: 12px 16px 12px 42px;
  background: var(--bg-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

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

.search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  width: 18px;
  height: 18px;
}

.book-group {
  margin-bottom: 24px;
}

.book-group-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--glass-border);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.book-group-title svg {
  width: 14px;
  height: 14px;
}

.word-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  margin-bottom: 6px;
  cursor: pointer;
  transition: all var(--duration-fast) ease;
  -webkit-tap-highlight-color: transparent;
}

.word-item:hover, .word-item:active {
  background: var(--bg-elevated);
  border-color: rgba(148, 163, 184, 0.15);
}

.word-item-text {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-primary);
}

.word-item-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

.word-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.word-status.new { background: var(--info); }
.word-status.learning { background: var(--warning); }
.word-status.mature { background: var(--success); }

/* ── Word Detail Modal ─────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}

.modal-overlay.active {
  display: flex;
  animation: fadeIn var(--duration-fast) ease;
}

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

.modal-content {
  width: 100%;
  max-width: var(--max-width);
  max-height: 85vh;
  background: var(--bg-base);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: 24px;
  overflow-y: auto;
  animation: slideUp var(--duration-normal) var(--ease-out);
}

@keyframes slideUp {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.modal-handle {
  width: 36px;
  height: 4px;
  background: var(--bg-hover);
  border-radius: var(--radius-full);
  margin: 0 auto 20px;
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ── Settings View ─────────────────────────────────────────────────── */
.settings-section {
  margin-bottom: 28px;
}

.settings-section-title {
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.setting-group {
  margin-bottom: 14px;
}

.setting-label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
  display: block;
}

.setting-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg-surface);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  outline: none;
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
}

.setting-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.setting-input::placeholder {
  color: var(--text-dim);
  font-family: 'Inter', sans-serif;
}

/* ── Buttons ───────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border: none;
  border-radius: var(--radius-md);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-spring);
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.96);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-hover));
  color: var(--accent-text);
  box-shadow: var(--shadow-sm), var(--shadow-glow);
}

.btn-primary:hover {
  box-shadow: var(--shadow-md), 0 0 40px var(--accent-glow);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

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

.btn-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-block {
  width: 100%;
}

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

/* ── Upload Area ───────────────────────────────────────────────────── */
.upload-area {
  border: 2px dashed var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px 20px;
  text-align: center;
  transition: all var(--duration-fast) ease;
  cursor: pointer;
}

.upload-area:hover, .upload-area.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.upload-area-icon {
  font-size: 2rem;
  margin-bottom: 8px;
}

.upload-area-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.upload-area-hint {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin-top: 4px;
}

/* ── Toast Notification ────────────────────────────────────────────── */
.toast-container {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  width: calc(100% - 32px);
  max-width: var(--max-width);
  pointer-events: none;
}

.toast {
  padding: 12px 16px;
  background: var(--bg-elevated);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  color: var(--text-primary);
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  gap: 8px;
  pointer-events: auto;
  animation: toastIn var(--duration-normal) var(--ease-out), toastOut var(--duration-normal) var(--ease-out) 2.5s forwards;
}

.toast.success { border-left: 3px solid var(--success); }
.toast.error { border-left: 3px solid var(--danger); }
.toast.info { border-left: 3px solid var(--info); }

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-20px); }
}

/* ── Manual Add Form ───────────────────────────────────────────────── */
.add-word-form {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

.add-word-form .setting-input {
  flex: 1;
}

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar {
  width: 4px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--bg-hover);
  border-radius: var(--radius-full);
}

/* ── Loading Spinner ───────────────────────────────────────────────── */
.spinner {
  width: 24px;
  height: 24px;
  border: 2px solid var(--glass-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 60px 20px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ── Connection Status Indicator ───────────────────────────────────── */
.connection-status {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 500;
}

.connection-status.online {
  background: var(--success-bg);
  color: var(--success);
}

.connection-status.offline {
  background: var(--danger-bg);
  color: var(--danger);
}

/* ── Utility Classes ───────────────────────────────────────────────── */
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.85rem; }
.hidden { display: none !important; }