/* 德译智 mobile app shell — shared by all pages through tokens.css */
@media (max-width: 768px) {
  :root {
    --mobile-edge: 16px;
    --mobile-radius-xl: 30px;
    --mobile-radius-lg: 24px;
    --mobile-radius-md: 18px;
  }

  html { scroll-behavior: smooth; }

  body {
    min-height: 100dvh;
    padding-bottom: env(safe-area-inset-bottom);
    overflow-x: hidden;
    background:
      radial-gradient(circle at 8% -4%, rgba(66,133,244,.12), transparent 30%),
      radial-gradient(circle at 92% 12%, rgba(123,97,255,.07), transparent 28%),
      var(--bg);
  }

  body::before { opacity: .5; animation-duration: 20s; }

  /* Shared top app bar */
  .navbar {
    position: sticky;
    top: 0;
    z-index: 110;
    min-height: 62px;
    padding: calc(10px + env(safe-area-inset-top)) 14px 10px !important;
    border: 0 !important;
    background: color-mix(in srgb, var(--bg) 80%, transparent) !important;
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
  }

  .nav-left { gap: 10px !important; min-width: 0; }
  .logo { gap: 8px !important; font-size: 17px !important; letter-spacing: -.3px; }
  .site-icon { width: 30px !important; height: 30px !important; border-radius: 10px !important; box-shadow: 0 4px 14px rgba(37,99,235,.11); }
  .site-title { white-space: nowrap; }

  #mobile-menu-btn,
  .theme-toggle-btn {
    width: 40px !important;
    height: 40px !important;
    display: grid !important;
    place-items: center;
    padding: 0 !important;
    border: 0 !important;
    border-radius: 15px !important;
    background: color-mix(in srgb, var(--surface) 84%, transparent) !important;
    box-shadow: 0 1px 0 rgba(255,255,255,.32) inset, 0 5px 18px rgba(0,0,0,.045);
    color: var(--text) !important;
  }

  .nav-right { gap: 6px !important; }
  .login-status-text,
  #toggle-register-panel-btn,
  #logout-btn { display: none !important; }
  #toggle-login-panel-btn {
    height: 40px !important;
    padding: 0 15px !important;
    border: 0 !important;
    border-radius: 15px !important;
    background: var(--primary-light) !important;
    color: var(--primary) !important;
    font-weight: 650 !important;
  }

  /* No permanent bottom navigation; the menu is the single global navigation entry. */
  .mobile-app-nav { display: none !important; }

  /* Shared page canvas */
  .main-content,
  .study-container,
  .exercise-container,
  .grammar-container,
  .sentence-container,
  .profile-container,
  .admin-container,
  .about-container,
  .changelog-container {
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 18px var(--mobile-edge) 30px !important;
  }

  h1,
  .main-title,
  .page-title,
  .study-title,
  .exercise-title,
  .grammar-title,
  .sentence-title {
    letter-spacing: -1px !important;
  }

  /* Shared card language */
  .result-card,
  .study-card,
  .exercise-card,
  .grammar-card,
  .sentence-card,
  .profile-card,
  .admin-card,
  .about-card,
  .log-item,
  .review-card,
  .stat-card,
  .settings-card,
  .word-card,
  .quiz-card {
    border-radius: var(--mobile-radius-lg) !important;
    border-color: color-mix(in srgb, var(--border) 80%, transparent) !important;
    box-shadow: 0 12px 34px rgba(24,39,75,.055) !important;
  }

  button,
  .btn,
  input,
  textarea,
  select,
  .mode-tab,
  .tab-btn {
    border-radius: 16px;
  }

  /* Home search */
  .search-container { display: block; width: 100%; text-align: left; }

  .main-title {
    margin: 10px 2px 24px !important;
    font-size: clamp(32px, 9vw, 42px) !important;
    line-height: 1.05 !important;
    font-weight: 650 !important;
    letter-spacing: -1.6px !important;
    background: linear-gradient(120deg, var(--text) 18%, #4f78ff 60%, #7667dc 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent !important;
    animation: mobile-title-in .5s var(--ease-out) both;
  }

  .main-title::after {
    content: '输入单词、短语或中文释义';
    display: block;
    margin-top: 10px;
    font-size: 14px;
    line-height: 1.4;
    letter-spacing: 0;
    font-weight: 450;
    color: var(--text-muted);
    -webkit-text-fill-color: var(--text-muted);
  }

  .search-area {
    position: relative;
    display: grid !important;
    grid-template-columns: minmax(0,1fr) 38px 52px;
    align-items: center;
    width: 100% !important;
    max-width: none !important;
    min-height: 68px;
    padding: 7px !important;
    overflow: hidden;
    border: 1px solid color-mix(in srgb, var(--primary) 10%, var(--border));
    border-radius: var(--mobile-radius-xl) !important;
    background: color-mix(in srgb, var(--surface) 93%, transparent) !important;
    box-shadow: 0 14px 34px rgba(24,39,75,.075), 0 2px 8px rgba(0,0,0,.025) !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    animation: mobile-search-in .52s var(--ease-out) .04s both;
    transition: transform .25s var(--ease-out), box-shadow .25s ease, border-color .25s ease;
  }

  .search-area:focus-within {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--primary) 35%, transparent);
    box-shadow: 0 18px 42px rgba(37,99,235,.11), 0 0 0 4px var(--primary-glow) !important;
  }

  .search-input {
    min-width: 0;
    padding: 0 8px 0 14px !important;
    font-size: 16px !important;
  }

  .search-clear-btn {
    width: 34px !important;
    height: 34px !important;
    margin: 0 !important;
    border-radius: 13px !important;
  }

  .search-btn {
    width: 48px !important;
    height: 48px !important;
    padding: 0 !important;
    border-radius: 19px !important;
    font-size: 0 !important;
    background: linear-gradient(135deg, #4776e6, #645fd4) !important;
    box-shadow: 0 8px 18px rgba(64,97,230,.22) !important;
  }

  .search-btn::after {
    content: '→';
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    font-size: 24px;
    color: #fff;
  }

  #suggestions { width: 100% !important; max-width: none !important; margin-top: 10px !important; }
  .suggest-item {
    margin: 5px 0 !important;
    padding: 13px 16px !important;
    border: 0 !important;
    border-radius: 18px !important;
    background: color-mix(in srgb, var(--surface) 93%, transparent) !important;
    box-shadow: 0 4px 16px rgba(0,0,0,.03) !important;
  }

  .result-card {
    width: 100% !important;
    max-width: none !important;
    margin-top: 18px !important;
    padding: 22px 18px 24px !important;
    border-radius: var(--mobile-radius-xl) !important;
    background: color-mix(in srgb, var(--surface) 95%, transparent) !important;
    overflow: hidden;
    animation: mobile-card-in .38s var(--ease-out) both;
  }

  .result-card table,
  .admin-container table,
  .profile-container table { display: block; overflow-x: auto; border-radius: 16px; }

  .translation-box,
  .extra-info { border-radius: 18px !important; border-left: 0 !important; }

  #homepage-extras,
  #review-reminder { width: 100% !important; max-width: none !important; }
  #homepage-extras > *,
  #review-reminder > * { border-radius: var(--mobile-radius-lg) !important; }

  .contribute-section {
    width: 100% !important;
    max-width: none !important;
    margin: 24px 0 0 !important;
    padding: 22px 18px !important;
    border-radius: var(--mobile-radius-xl) !important;
  }
  .contribute-actions { display: grid !important; grid-template-columns: 1fr; gap: 9px !important; }

  /* Common page tabs / controls */
  .mode-tabs,
  .tab-bar,
  .filter-tabs {
    padding: 5px !important;
    gap: 4px !important;
    border-radius: 20px !important;
    background: color-mix(in srgb, var(--surface) 90%, transparent) !important;
    overflow-x: auto;
    scrollbar-width: none;
  }
  .mode-tabs::-webkit-scrollbar,
  .tab-bar::-webkit-scrollbar,
  .filter-tabs::-webkit-scrollbar { display: none; }

  /* Shared sidebar + auth sheets */
  .sidebar {
    top: auto !important;
    left: 10px !important;
    right: 10px !important;
    bottom: -110% !important;
    width: auto !important;
    height: min(72dvh,620px) !important;
    padding: 18px !important;
    border-radius: 30px 30px 0 0 !important;
    transition: bottom .34s var(--ease-out) !important;
    box-shadow: 0 -20px 60px rgba(0,0,0,.18) !important;
  }
  .sidebar.open { bottom: 0 !important; }
  .mobile-nav { margin-top: 48px !important; gap: 6px !important; }
  .mobile-nav a { padding: 13px 15px !important; border-radius: 17px !important; font-size: 16px !important; }

  .modal-panel {
    top: auto !important;
    left: 10px !important;
    right: 10px !important;
    bottom: max(10px, env(safe-area-inset-bottom)) !important;
    width: auto !important;
    max-width: none !important;
    padding: 30px 20px 20px !important;
    border-radius: 30px !important;
    transform: none !important;
    animation: mobile-sheet-in .3s var(--ease-out) both !important;
  }
  .modal-input { min-height: 50px; border-radius: 17px !important; }
  .modal-panel .btn-full { min-height: 50px; border-radius: 17px !important; }

  @keyframes mobile-title-in {
    from { opacity: 0; transform: translateY(14px); filter: blur(5px); }
    to { opacity: 1; transform: none; filter: blur(0); }
  }
  @keyframes mobile-search-in {
    from { opacity: 0; transform: translateY(16px) scale(.985); }
    to { opacity: 1; transform: none; }
  }
  @keyframes mobile-card-in {
    from { opacity: 0; transform: translateY(10px) scale(.99); }
    to { opacity: 1; transform: none; }
  }
  @keyframes mobile-sheet-in {
    from { opacity: 0; transform: translateY(30px) scale(.985); }
    to { opacity: 1; transform: none; }
  }
}

@media (max-width: 768px) and (prefers-reduced-motion: reduce) {
  .main-title,
  .search-area,
  .result-card,
  .suggest-item,
  .modal-panel { animation: none !important; transition: none !important; }
}