/* ═══════════════════════════════════════════════════
   NHI 健保藥品查詢系統 — Premium Design System v2
   Healthcare × Professional × Refined
   ═══════════════════════════════════════════════════ */

/* ─── CSS 變數 ───────────────────────────────────── */
:root {
  /* 品牌主色 */
  --primary:       #0891B2;
  --primary-dark:  #0E7490;
  --primary-light: #BAE6FD;

  /* Header 深色主題 */
  --header-bg:     #0c3d4f;
  --header-bg2:    #0a3244;
  --header-text:   #ffffff;
  --header-muted:  rgba(255,255,255,0.65);

  /* CTA / 操作色 */
  --cta:           #059669;
  --cta-dark:      #047857;
  --cta-light:     rgba(5,150,105,0.1);

  /* 頁面背景與表面 */
  --bg:            #e8f4f8;
  --bg-soft:       #f0f9fc;
  --surface:       #ffffff;
  --surface-alt:   #f7fbfd;
  --surface-hover: #f0f9fc;

  /* 文字 */
  --text:          #0f3244;
  --text-muted:    #4a7a8c;
  --text-light:    #94adb7;

  /* 邊框 */
  --border:        #b8dde8;
  --border-light:  #dceef4;
  --border-focus:  #0891B2;

  /* 語義色 */
  --danger:        #DC2626;
  --warning:       #D97706;
  --success:       #059669;
  --price-color:   #047857;

  /* Level 顏色系統 */
  --level-1-color: #059669;
  --level-1-bg:    #D1FAE5;
  --level-1-text:  #065F46;
  --level-2-color: #0891B2;
  --level-2-bg:    #DBEAFE;
  --level-2-text:  #1E40AF;
  --level-3-color: #D97706;
  --level-3-bg:    #FEF3C7;
  --level-3-text:  #92400E;
  --level-4-color: #DC2626;
  --level-4-bg:    #FEE2E2;
  --level-4-text:  #991B1B;

  /* 圓角 */
  --radius-xs:  4px;
  --radius-sm:  6px;
  --radius:     10px;
  --radius-lg:  16px;
  --radius-xl:  20px;
  --radius-2xl: 28px;

  /* 陰影 */
  --shadow-xs:  0 1px 2px rgba(8,61,79,.06);
  --shadow-sm:  0 1px 4px rgba(8,61,79,.08), 0 1px 2px rgba(8,61,79,.04);
  --shadow:     0 4px 16px rgba(8,61,79,.10), 0 2px 6px rgba(8,61,79,.06);
  --shadow-md:  0 8px 24px rgba(8,61,79,.14), 0 3px 8px rgba(8,61,79,.07);
  --shadow-lg:  0 16px 48px rgba(8,61,79,.18), 0 6px 16px rgba(8,61,79,.09);
  --shadow-xl:  0 24px 64px rgba(8,61,79,.22), 0 8px 24px rgba(8,61,79,.10);

  /* 過渡 */
  --ease:        cubic-bezier(.4, 0, .2, 1);
  --transition:  150ms cubic-bezier(.4,0,.2,1);
  --transition-md: 250ms cubic-bezier(.4,0,.2,1);

  /* Header 高度 */
  --header-h: 62px;
}

/* ─── Reset & Base ──────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'Noto Sans TC', 'Figtree', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); border: 0;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
svg { flex-shrink: 0; }
input, select, button, textarea { font-family: inherit; }

/* ─── Header ──────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: linear-gradient(135deg, var(--header-bg) 0%, var(--header-bg2) 100%);
  box-shadow: 0 2px 16px rgba(8,61,79,.28), 0 1px 4px rgba(8,61,79,.14);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--header-text);
  font-family: 'Figtree', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -.01em;
  white-space: nowrap;
}

.brand-icon {
  width: 26px;
  height: 26px;
  opacity: .9;
}

.pro-badge {
  background-color: #06B6D4; /* Cyan color */
  color: #fff;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 999px;
  margin-left: 8px;
  letter-spacing: 0.05em;
  box-shadow: 0 0 0 1.5px rgba(6, 182, 212, 0.2);
  display: inline-flex;
  align-items: center;
  align-self: center;
  line-height: 1;
}
.sync-info {
  font-size: .72rem;
  color: var(--header-muted);
  text-align: right;
  flex-shrink: 0;
  letter-spacing: .01em;
}

/* ─── Layout ──────────────────────────────────── */
.main-layout {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  max-width: 1280px;
  margin: 0 auto;
  width: 100%;
  padding: 28px 24px;
  gap: 20px;
}

.content-area {
  display: flex;
  flex-direction: column;
  min-height: 400px;
  flex: 1;
}

/* ─── Search Panel ────────────────────────────── */
.search-panel {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.search-box {
  display: flex;
  gap: 10px;
  align-items: center;
}

.search-input-wrap {
  flex: 1;
  position: relative;
  min-width: 0;
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
  transition: color var(--transition);
}

#searchInput {
  width: 100%;
  padding: 13px 16px 13px 44px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  font-weight: 400;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  box-shadow: var(--shadow-xs);
  -webkit-appearance: none;
  appearance: none;
}
#searchInput::placeholder { color: var(--text-light); }
#searchInput:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8,145,178,.18), var(--shadow-sm);
}
#searchInput:focus + .search-icon,
.search-input-wrap:focus-within .search-icon { color: var(--primary); }

/* ─── Buttons ─────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius);
  border: none;
  font-size: .9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), color var(--transition);
  white-space: nowrap;
  outline: none;
  min-height: 44px;
  flex-shrink: 0;
}
.btn:focus-visible { box-shadow: 0 0 0 3px rgba(8,145,178,.35); }
.btn svg { width: 16px; height: 16px; }

.btn-cta {
  background: linear-gradient(135deg, #059669, #047857);
  color: #fff;
  box-shadow: 0 2px 8px rgba(5,150,105,.3);
}
.btn-cta:hover {
  background: linear-gradient(135deg, #047857, #065f46);
  box-shadow: 0 4px 14px rgba(5,150,105,.4);
  transform: translateY(-1px);
}
.btn-cta:active { transform: scale(.97); box-shadow: none; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  box-shadow: 0 2px 8px rgba(8,145,178,.3);
}
.btn-primary:hover {
  box-shadow: 0 4px 14px rgba(8,145,178,.4);
  transform: translateY(-1px);
}
.btn-primary:disabled {
  opacity: .45;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { background: var(--surface-hover); color: var(--text); border-color: var(--primary); }

/* btn-secondary：白底藍框，用於次要強調按鈕（如「比較電子仿單」） */
.btn-secondary {
  background: #fff;
  color: #2563EB;
  border: 1.5px solid #2563EB;
  font-weight: 600;
}
.btn-secondary:hover { background: #EFF6FF; border-color: #1D4ED8; color: #1D4ED8; }
.btn-secondary.active { background: #DBEAFE; color: #1D4ED8; border-color: #1D4ED8; }


.btn-sm { padding: 6px 14px; font-size: .82rem; min-height: 36px; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); min-height: 40px; min-width: 40px; justify-content: center; }
.btn-link { background: none; border: none; color: var(--primary); padding: 0; font-size: inherit; cursor: pointer; }
.btn-link:hover { text-decoration: underline; }

/* ─── Active Filters ──────────────────────────── */
.active-filters {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  padding: 8px 14px;
  background: rgba(8,145,178,.07);
  border-radius: var(--radius);
  border: 1px solid rgba(8,145,178,.2);
}
.active-filters-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  flex: 1;
}
.filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  background: var(--primary);
  color: #fff;
  border-radius: 999px;
  font-size: .76rem;
  font-weight: 500;
}
.filter-tag button {
  background: none;
  border: none;
  color: rgba(255,255,255,.75);
  cursor: pointer;
  display: flex;
  align-items: center;
  padding: 0;
  margin-left: 2px;
  min-height: 20px;
}
.filter-tag button:hover { color: #fff; }
.filter-tag button svg { width: 12px; height: 12px; }

/* ─── Advanced Filters ────────────────────────── */
.advanced-section { position: relative; }

.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: .88rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition), box-shadow var(--transition);
  min-height: 44px;
  box-shadow: var(--shadow-xs);
}
.advanced-toggle svg:first-child { width: 16px; height: 16px; }
.advanced-toggle .chevron { width: 16px; height: 16px; margin-left: auto; transition: transform var(--transition-md); }
.advanced-toggle[aria-expanded="true"] { color: var(--primary); border-color: var(--primary); background: rgba(8,145,178,.04); border-radius: var(--radius) var(--radius) 0 0; }
.advanced-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }
.advanced-toggle:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow-sm); }

.advanced-filters {
  display: none;
  padding: 20px;
  background: var(--surface);
  border: 1.5px solid var(--primary);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: var(--shadow-sm);
}
.advanced-filters.open { display: block; }

.filter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.filter-group--full { grid-column: 1/-1; }

.filter-group label:first-child {
  display: block;
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: .06em;
}
.filter-group select,
.filter-group input[type="text"],
.filter-group input[type="number"] {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-soft);
  color: var(--text);
  font-size: .9rem;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 42px;
}
.filter-group select:focus,
.filter-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8,145,178,.12);
  background: var(--surface);
}

.radio-group { display: flex; gap: 12px; flex-wrap: nowrap; align-items: center; min-height: 40px; }
.radio-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .93rem;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.radio-label input { accent-color: var(--primary); width: 16px; height: 16px; cursor: pointer; }

.price-range { display: flex; align-items: center; gap: 10px; }
.price-range span { color: var(--text-muted); flex-shrink: 0; font-size: .85rem; }
.price-range input { flex: 1; }

/* ─── Tag Legend ──────────────────────────────── */
.tag-legend {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  background: rgba(8,145,178,.05);
  border: 1px solid rgba(8,145,178,.15);
  border-radius: var(--radius);
  font-size: .8rem;
  color: var(--text-muted);
}
.tag-legend svg { width: 14px; height: 14px; color: var(--primary); flex-shrink: 0; }
.tag-legend strong { color: var(--primary); font-weight: 700; }

/* ─── Results Meta ────────────────────────────── */
.results-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
  font-size: .85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 8px;
}
.view-toggle { display: flex; gap: 4px; align-items: center; }
.view-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}
.view-btn svg { width: 16px; height: 16px; }
.view-btn.active,
.view-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ─── Empty / No Results / Loading ───────────── */
.empty-state, .no-results {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 72px 24px;
  color: var(--text-muted);
  gap: 14px;
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 2px dashed var(--border);
}
.empty-state svg, .no-results svg { width: 56px; height: 56px; opacity: .25; }
.empty-state h2, .no-results h2 { font-size: 1.1rem; font-weight: 700; color: var(--text); }
.empty-state p, .no-results ul { font-size: .9rem; max-width: 360px; }
.no-results ul { list-style: disc; text-align: left; padding-left: 20px; }
.no-results li { margin: 6px 0; }

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 72px 24px;
  gap: 16px;
  color: var(--text-muted);
}

.spinner {
  width: 36px; height: 36px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin .7s linear infinite;
}
.spinner--sm { width: 20px; height: 20px; border-width: 2px; }
@keyframes spin { to { transform: rotate(360deg); } }

.load-more-indicator {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 20px;
  color: var(--text-muted);
  font-size: .85rem;
}

/* ─── Card List ───────────────────────────────── */
.results-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

/* ─── Drug Card (Premium) ─────────────────────── */
.drug-card {
  background: var(--surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  border-left: 4px solid transparent;
  padding: 16px 18px;
  cursor: pointer;
  transition: border-color var(--transition), border-left-color var(--transition), box-shadow var(--transition-md), transform var(--transition);
  position: relative;
  box-shadow: var(--shadow-xs);
}
.drug-card:hover {
  border-color: var(--border);
  border-left-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.drug-card:active { transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.drug-card:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

.drug-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}
.drug-name-en-main {
  font-size: 1.02rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  font-family: 'Figtree', sans-serif;
}
.drug-name-en-main strong em {
  font-weight: 800;
  font-style: italic;
  color: var(--primary);
}
.drug-name-zh-sub {
  font-size: .8rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.3;
}
.drug-price {
  flex-shrink: 0;
  font-family: 'Figtree', monospace;
  font-weight: 700;
  font-size: 1rem;
  color: var(--price-color);
  background: var(--cta-light);
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
  letter-spacing: -.01em;
}
.drug-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

/* ─── Clickable Field Tags ────────────────────── */
.field-tag {
  display: inline-flex;
  flex-direction: row-reverse;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  font-size: .75rem;
  color: var(--text-muted);
  background: var(--bg-soft);
  cursor: pointer;
  transition: all var(--transition);
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.field-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(8,145,178,.06);
}
.field-tag svg { width: 10px; height: 10px; opacity: .5; flex-shrink: 0; }
.field-tag:hover svg { opacity: 1; }

.ingredient-list { display: flex; flex-direction: column; gap: 8px; }
.ingredient-item {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px;
  background: rgba(8,145,178,.03);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
}
.ingredient-item:hover { background: rgba(8,145,178,.07); border-color: var(--border); }
.ingredient-text { flex: 1; font-size: .93rem; color: var(--text); line-height: 1.55; word-break: break-word; }
.filter-add-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; flex-shrink: 0;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: 50%;
  color: var(--text-muted);
  padding: 0;
  cursor: pointer;
  transition: all var(--transition);
}
.filter-add-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(8,145,178,.06); transform: scale(1.06); }
.filter-add-btn:active { transform: scale(0.95); }
.filter-add-btn svg { width: 16px; height: 16px; }

/* ─── Badges ──────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: .73rem;
  font-weight: 600;
}
.badge-blue  { background: rgba(8,145,178,.1);  color: var(--primary-dark); }
.badge-green { background: rgba(5,150,105,.1);  color: var(--cta-dark); }
.badge-gray  { background: var(--border-light); color: var(--text-muted); }

/* ─── Detail Button ───────────────────────────── */
.detail-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  margin-left: auto;
  min-height: 32px;
  white-space: nowrap;
}
.detail-btn:hover { background: var(--primary-dark); transform: scale(1.03); box-shadow: 0 2px 8px rgba(8,145,178,.3); }
.detail-btn:active { transform: scale(0.97); box-shadow: none; }
.detail-btn svg { width: 13px; height: 13px; }

/* ─── Table View ──────────────────────────────── */
.results-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1.5px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.results-table { width: 100%; border-collapse: collapse; background: var(--surface); }
.results-table thead { background: var(--surface-alt); position: sticky; top: var(--header-h); z-index: 10; }
.results-table th {
  padding: 12px 14px;
  text-align: left;
  font-size: .75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  white-space: nowrap;
  border-bottom: 2px solid var(--border);
  background: var(--surface-alt);
  min-width: 80px;
}
.results-table th.sortable { cursor: pointer; transition: background var(--transition), color var(--transition); user-select: none; }
.results-table th.sortable:hover { background: var(--border-light); color: var(--text); }
.results-table th .sort-icon {
  display: inline-block; width: 14px; height: 14px;
  margin-left: 4px; vertical-align: text-bottom; opacity: .3;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="7 15 12 20 17 15"/><polyline points="7 9 12 4 17 9"/></svg>');
  background-size: contain; background-repeat: no-repeat;
}
.results-table th.sort-asc .sort-icon {
  opacity: 1;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%230891B2" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="18 15 12 9 6 15"/></svg>');
}
.results-table th.sort-desc .sort-icon {
  opacity: 1;
  background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%230891B2" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"/></svg>');
}
.results-table td { padding: 12px 14px; font-size: .88rem; border-bottom: 1px solid var(--border-light); vertical-align: middle; }
.results-table tbody tr { transition: background var(--transition); cursor: pointer; }
.results-table tbody tr:last-child td { border-bottom: none; }
.results-table tbody tr:hover { background: rgba(8,145,178,.04); }
.results-table .code-cell { font-family: 'Figtree', monospace; font-size: .84rem; color: var(--text-muted); }
.results-table .name-cell { font-weight: 600; max-width: 220px; color: var(--text); }
.results-table .ingredient-cell { max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.results-table .price-cell { font-weight: 700; color: var(--price-color); white-space: nowrap; font-family: 'Figtree', monospace; }

/* ─── Detail View ─────────────────────────────── */
.detail-view {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  border: 1.5px solid var(--border-light);
  animation: slideUp var(--transition-md);
  margin-bottom: 40px;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.detail-header-actions {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-light);
  background: var(--surface-alt);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  position: sticky;
  top: var(--header-h);
  z-index: 10;
}

#detailClose {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: .9rem;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 999px;
  border: 1.5px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  transition: all var(--transition);
}
#detailClose svg { width: 17px; height: 17px; }
#detailClose:hover { background: rgba(8,145,178,.06); color: var(--primary); border-color: var(--primary); }
#detailClose:active { transform: scale(0.97); }

.detail-body-main {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Detail sections */
.detail-section {
  background: var(--surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-xs);
}
.detail-section-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 18px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--border-light);
  display: flex;
  align-items: center;
  gap: 8px;
}
.detail-core-header { margin-bottom: 16px; }
.detail-name-en {
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  font-family: 'Figtree', sans-serif;
  letter-spacing: -.01em;
}
.detail-name-en strong em { font-weight: 800; font-style: italic; color: var(--primary); }
.detail-name-zh { font-size: .95rem; color: var(--text-muted); margin-top: 4px; }
.detail-price-row { display: flex; align-items: center; gap: 16px; margin-top: 16px; flex-wrap: wrap; }
.detail-price {
  font-family: 'Figtree', monospace;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--price-color);
  line-height: 1;
  letter-spacing: -.02em;
}
.detail-price-label { font-size: .82rem; color: var(--text-muted); margin-bottom: 4px; font-weight: 500; }

.detail-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 12px;
  font-size: .93rem;
}
.detail-row:last-child { margin-bottom: 0; }
.detail-row-label {
  flex-shrink: 0;
  color: var(--text-muted);
  width: 92px;
  font-size: .8rem;
  font-weight: 700;
  padding-top: 2px;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.detail-row-value { color: var(--text); word-break: break-word; flex: 1; }

.copy-wrap { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  background: var(--bg-soft);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: .78rem;
  cursor: pointer;
  gap: 4px;
  transition: all var(--transition);
  min-height: 30px;
}
.copy-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(8,145,178,.06); }
.copy-btn svg { width: 13px; height: 13px; }

.action-buttons { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: .88rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  min-height: 42px;
  box-shadow: var(--shadow-xs);
}
.btn-action svg { width: 16px; height: 16px; }
.btn-action:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(8,145,178,.05);
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-action:active { transform: translateY(0); box-shadow: none; }
.btn-action.btn-action--pdf { border-color: #e2a83e; color: #b45309; }
.btn-action.btn-action--pdf:hover { background: rgba(180,83,9,.05); }
.btn-action.btn-action--ext { border-color: var(--primary); color: var(--primary-dark); }

/* 有效期間 — 緊湊 */
.detail-section--compact {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: var(--surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
}
.detail-inline-label {
  font-size: .72rem;
  font-weight: 700;
  color: var(--text-muted);
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: .05em;
}
.detail-inline-value { font-size: .93rem; font-weight: 600; color: var(--text); font-family: 'Figtree', monospace; }

/* EPI 仿單 */
.epi-loading { display: flex; align-items: center; gap: 10px; color: var(--text-muted); font-size: .9rem; padding: 12px 0; }
.epi-block { margin-bottom: 14px; padding: 12px 16px; background: var(--surface-alt); border-left: 3px solid var(--primary); border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
.epi-block:last-child { margin-bottom: 0; }
.epi-block-label { font-size: .75rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--primary-dark); margin-bottom: 8px; }
.epi-block-text { font-size: .88rem; color: var(--text); line-height: 1.75; white-space: pre-wrap; word-break: break-word; }
.epi-none { color: var(--text-muted); font-size: .9rem; font-style: italic; padding: 8px 0; }

/* ─── Toast ───────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  background: #1E293B;
  color: #fff;
  border-radius: var(--radius);
  font-size: .93rem;
  font-weight: 500;
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: toastIn .3s cubic-bezier(.4,0,.2,1);
  max-width: 400px;
}
.toast svg { width: 18px; height: 18px; flex-shrink: 0; }
.toast.toast-success { background: var(--cta-dark); }
.toast.toast-error   { background: var(--danger); }
@keyframes toastIn {
  from { opacity:0; transform:translateY(20px) scale(.95); }
  to   { opacity:1; transform:translateY(0) scale(1); }
}

/* ─── Footer ──────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 20px 24px;
  font-size: .82rem;
  color: var(--text-light);
  border-top: 1px solid var(--border-light);
  background: var(--surface);
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: auto;
}
.site-footer a { color: var(--text-muted); transition: color var(--transition); }
.site-footer a:hover { color: var(--primary); }

/* ─── Responsive ──────────────────────────────── */
@media (min-width: 640px) {
  .filter-grid { grid-template-columns: repeat(3, 1fr); }
  .results-list { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .filter-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .filter-group--full { grid-column: span 2; }
  .results-list { grid-template-columns: repeat(3, 1fr); }
  .detail-body-main { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .detail-section:first-child { grid-column: 1 / -1; }
  #epiSection { grid-column: 1 / -1; }
}

@media (max-width: 639px) {
  :root { --header-h: 56px; }
  .main-layout { padding: 14px 14px; gap: 14px; }
  .detail-body-main { padding: 14px; gap: 14px; }
  .header-inner { padding: 0 16px; }
  .brand-text { font-size: 1rem; }
  .brand-icon { width: 22px; height: 22px; }
  .sync-info { display: none; }
  .view-toggle { display: none; }
  .results-table-wrap { display: none !important; }
  /* 搜尋按鈕不截斷修正 */
  .search-box { gap: 8px; }
  #searchBtn { min-width: 72px; padding: 10px 12px; }
  #searchBtn .btn-text { display: none; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}


/* ═══════════════════════════════════════════════════════════
   PRO MODE — 候選替代品項搜尋平台 (Premium v2)
   ═══════════════════════════════════════════════════════════ */

/* ─── 觸發按鈕 ─────────────────────────────────── */
.sub-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: .75rem;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(135deg, #7C3AED, #5B21B6);
  border: none;
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  cursor: pointer;
  transition: opacity .15s, transform .1s, box-shadow .15s;
  white-space: nowrap;
  letter-spacing: .01em;
  min-height: 32px;
  box-shadow: 0 2px 6px rgba(124,58,237,.35);
}
.sub-trigger-btn:hover {
  opacity: .9;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(124,58,237,.4);
}
.sub-trigger-btn:active { transform: scale(.97); box-shadow: none; }
.sub-trigger-btn svg { width: 13px; height: 13px; stroke-width: 2.5; }
.sub-trigger-btn--detail { font-size: .82rem; padding: 8px 16px; margin-left: 8px; min-height: 38px; }
.sub-trigger-btn--disabled {
  opacity: 0.65;
  cursor: pointer !important;
  background: linear-gradient(135deg, #94A3B8, #64748B) !important;
  box-shadow: 0 2px 6px rgba(100,116,139,0.25) !important;
}
.sub-trigger-btn--disabled:hover {
  opacity: 1 !important;
  transform: none !important;
  box-shadow: 0 2px 6px rgba(100,116,139,0.25) !important;
}

/* ─── Substitute Panel (Full-Screen, 取代 Modal) ── */
.sub-panel {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--border-light);
  box-shadow: var(--shadow-md);
  animation: slideUp var(--transition-md);
  margin-bottom: 40px;
  overflow: hidden;
}

/* ─── Sub Panel Header & Breadcrumb ─────────────── */
.sub-panel-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 20px;
  background: linear-gradient(135deg, #4C1D95 0%, #6D28D9 100%);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  flex-shrink: 0;
  position: sticky;
  top: var(--header-h);
  z-index: 20;
  gap: 12px;
}

.sub-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255,255,255,.85);
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 999px;
  padding: 6px 16px;
  cursor: pointer;
  transition: background .15s, color .15s;
  white-space: nowrap;
  min-height: 36px;
}
.sub-back-btn:hover { background: rgba(255,255,255,.22); color: #fff; }
.sub-back-btn svg { width: 15px; height: 15px; }

.sub-panel-title-group {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.sub-panel-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sub-badge {
  font-size: .62rem;
  font-weight: 800;
  letter-spacing: .08em;
  padding: 2px 7px;
  border-radius: 4px;
  flex-shrink: 0;
}
.sub-badge-pro {
  background: rgba(255,255,255,.2);
  color: #fff;
  border: 1px solid rgba(255,255,255,.35);
}

/* ─── Target Drug Card ───────────────────────────── */
.sub-target-card {
  padding: 12px 20px;
  background: linear-gradient(135deg, #F5F3FF, #EDE9FE);
  border-bottom: 1px solid #DDD6FE;
  flex-shrink: 0;
}
.sub-target-label {
  font-size: .68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: #7C3AED;
  margin-bottom: 4px;
}
.sub-target-name-en { font-weight: 700; font-size: .95rem; color: var(--text); font-family: 'Figtree', sans-serif; }
.sub-target-name-zh { font-size: .8rem; color: var(--text-muted); }
.sub-target-meta    { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 8px; }
.sub-skeleton-line  { height: 12px; background: #E8E4F7; border-radius: 4px; margin-bottom: 6px; }

/* ─── Level Tabs (Premium) ───────────────────────── */
.sub-tabs {
  display: flex;
  border-bottom: 2px solid var(--border-light);
  flex-shrink: 0;
  background: var(--surface-alt);
}

.sub-tab {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 8px;
  background: none;
  border: none;
  border-bottom: 4px solid transparent;
  cursor: pointer;
  color: var(--text-muted);
  font-size: .82rem;
  font-weight: 500;
  transition: color .2s, border-color .2s, background .2s;
  position: relative;
  bottom: -2px;
}
.sub-tab:hover { background: rgba(8,145,178,.04); }

.sub-tab-title {
  font-size: 0.95rem;
  font-weight: 800;
  letter-spacing: .02em;
  margin-bottom: 1px;
}

/* Level 1 Tab */
.sub-tab[data-level="1"]:hover { color: var(--level-1-color); }
.sub-tab[data-level="1"].sub-tab--active {
  color: var(--level-1-color);
  border-bottom-color: var(--level-1-color);
  font-weight: 700;
  background: rgba(5,150,105,.05);
}

/* Level 2 Tab */
.sub-tab[data-level="2"]:hover { color: var(--level-2-color); }
.sub-tab[data-level="2"].sub-tab--active {
  color: var(--level-2-color);
  border-bottom-color: var(--level-2-color);
  font-weight: 700;
  background: rgba(8,145,178,.05);
}

/* Level 3 Tab */
.sub-tab[data-level="3"]:hover { color: var(--level-3-color); }
.sub-tab[data-level="3"].sub-tab--active {
  color: var(--level-3-color);
  border-bottom-color: var(--level-3-color);
  font-weight: 700;
  background: rgba(217,119,6,.05);
}

/* Level 4 Tab */
.sub-tab[data-level="4"]:hover { color: var(--level-4-color); }
.sub-tab[data-level="4"].sub-tab--active {
  color: var(--level-4-color);
  border-bottom-color: var(--level-4-color);
  font-weight: 700;
  background: rgba(220,38,38,.05);
}

.sub-tab-count {
  font-size: 0.85rem;
  font-weight: 800;
  color: var(--text-muted);
  font-family: 'Figtree', sans-serif;
  background: rgba(15, 23, 42, 0.08); /* light gray pill */
  padding: 2px 10px;
  border-radius: var(--radius-xl);
  margin-top: 4px;
  display: inline-block;
  transition: all .2s;
}

/* 當頁籤選中時，品項數圓角徽章套用與上方 Level 級別相同的顏色（且文字改白色以區隔） */
.sub-tab[data-level="1"].sub-tab--active .sub-tab-count {
  background: var(--level-1-color) !important;
  color: #fff !important;
}
.sub-tab[data-level="2"].sub-tab--active .sub-tab-count {
  background: var(--level-2-color) !important;
  color: #fff !important;
}
.sub-tab[data-level="3"].sub-tab--active .sub-tab-count {
  background: var(--level-3-color) !important;
  color: #fff !important;
}
.sub-tab[data-level="4"].sub-tab--active .sub-tab-count {
  background: var(--level-4-color) !important;
  color: #fff !important;
}

.sub-tab-label {
  text-align: center;
  line-height: 1.25;
}
.sub-tab-label small {
  display: inline-block;
  font-size: .72rem;
  font-weight: 400;
  opacity: .8;
  margin-top: 1px;
}
.sub-tab-label strong {
  font-weight: 800;
}

/* Different level color highlights */
.highlight-diff {
  color: #DC2626 !important; /* Red color for different/difference word */
  font-weight: bold;
}
.highlight-count {
  color: #7C3AED !important; /* Bold purple color for counts */
  font-weight: 800;
  font-size: 1.05rem;
  padding: 0 2px;
}

/* Level 顏色圓點 */
.sub-tab-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
  margin-bottom: 2px;
  transition: transform .15s;
}
.sub-tab[data-level="1"] .sub-tab-dot { background: var(--level-1-color); }
.sub-tab[data-level="2"] .sub-tab-dot { background: var(--level-2-color); }
.sub-tab[data-level="3"] .sub-tab-dot { background: var(--level-3-color); }
.sub-tab[data-level="4"] .sub-tab-dot { background: var(--level-4-color); }
.sub-tab.sub-tab--active .sub-tab-dot { transform: scale(1.4); }

/* 原藥品固定首列 (Sticky row) */
.sub-row--target td {
  position: sticky !important;
  top: 36px; /* directly below header th (approx 36px height) */
  background: #F3E8FF !important; /* soft purple theme for target */
  z-index: 5;
  border-bottom: 2.5px solid #7C3AED !important;
}
.sub-row--target:hover td {
  background: #E9D5FF !important;
}

/* ─── Warning Bar ─────────────────────────────────── */
.sub-warning-bar {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 8px 20px;
  background: #FFFBEB;
  border-bottom: 1px solid #FDE68A;
  color: #92400E;
  font-size: .78rem;
  flex-shrink: 0;
  line-height: 1.5;
}
.sub-warning-bar--l4 { background: #FFF7ED; border-color: #FED7AA; color: #C2410C; }

/* ─── Filter Bar ──────────────────────────────────── */
.sub-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 10px 20px;
  background: var(--surface-alt);
  border-bottom: 1px solid var(--border-light);
  align-items: center;
  flex-shrink: 0;
}
.sub-filter-select {
  font-size: .78rem;
  padding: 5px 10px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color var(--transition);
  min-height: 34px;
}
.sub-filter-select:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(8,145,178,.12); }
.sub-filter-clear {
  font-size: .75rem;
  padding: 5px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-muted);
  cursor: pointer;
  transition: all .15s;
  min-height: 34px;
}
.sub-filter-clear:hover { background: var(--bg); border-color: var(--danger); color: var(--danger); }
.sub-filter-count { font-size: .75rem; color: var(--text-muted); margin-left: auto; font-family: 'Figtree', monospace; }

/* ─── List Wrapper ────────────────────────────────── */
.sub-list-wrapper {
  flex: 1;
  overflow-y: auto;
  min-height: 300px;
}

.sub-loading, .sub-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 60px 24px;
  color: var(--text-muted);
  font-size: .88rem;
}
.sub-empty { flex-direction: column; gap: 8px; text-align: center; }
.sub-empty-icon { font-size: 2.8rem; opacity: .45; line-height: 1; }
.sub-empty-title { font-size: .95rem; font-weight: 700; color: var(--text); }
.sub-empty-desc { font-size: .82rem; color: var(--text-muted); max-width: 320px; line-height: 1.6; }

/* ─── Sub Table (Premium) ─────────────────────────── */
.sub-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}

.sub-table thead th {
  position: sticky;
  top: 0;
  background: #F0F4F8;
  padding: 9px 10px;
  text-align: left;
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
  z-index: 2;
}

.sub-table tbody tr {
  border-bottom: 1px solid var(--border-light);
  transition: background .1s;
}
.sub-table tbody tr:hover { background: rgba(8,145,178,.04); }

/* 選中行：左側 accent 條 */
.sub-row--selected {
  background: rgba(109,40,217,.05) !important;
  border-left: 3px solid #7C3AED;
}
.sub-row--selected td:first-child { padding-left: 7px; }

.sub-table td { padding: 9px 10px; vertical-align: middle; color: var(--text); }
.sub-th-check, .sub-td-check { width: 38px; text-align: center; }

.sub-td-wrap {
  max-width: 220px;
  white-space: normal;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.3;
  word-break: break-word;
}
.sub-code { font-family: 'Figtree', monospace; font-size: .82rem; color: var(--text-muted); }
.sub-name-en { font-weight: 600; font-size: .86rem; font-family: 'Figtree', sans-serif; color: var(--text); }
.sub-name-zh { font-size: .78rem; color: var(--text-muted); margin-top: 1px; }
.sub-lic     { cursor: default; }
.sub-link    { display: inline-flex; align-items: center; gap: 3px; color: var(--primary); text-decoration: none; font-size: .82rem; }
.sub-link:hover { text-decoration: underline; }
.sub-link svg { width: 11px; height: 11px; }
.sub-mfr { font-size: .82rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; display: block; max-width: 130px; }

/* ─── Sortable Columns ────────────────────────────── */
.sub-th-sort { cursor: pointer; user-select: none; white-space: nowrap; transition: background .15s, color .15s; }
.sub-th-sort:hover { background: rgba(109,40,217,.08); color: var(--text); }
.sub-sort-icon { display: inline-block; font-size: .7rem; opacity: .45; transition: opacity .15s; margin-left: 3px; }
.sub-th-sort:hover .sub-sort-icon { opacity: 1; }

/* ─── Level Color Badges (在表格內) ─────────────────── */
.sub-level-1 { background: var(--level-1-bg) !important; color: var(--level-1-text) !important; }
.sub-level-2 { background: var(--level-2-bg) !important; color: var(--level-2-text) !important; }
.sub-level-3 { background: var(--level-3-bg) !important; color: var(--level-3-text) !important; }
.sub-level-4 { background: var(--level-4-bg) !important; color: var(--level-4-text) !important; }

/* ─── Pagination ──────────────────────────────────── */
.sub-pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 12px;
  border-top: 1px solid var(--border-light);
  background: var(--surface-alt);
}
.sub-page-info { font-size: .78rem; color: var(--text-muted); font-family: 'Figtree', monospace; }

/* ─── Compare Bar (sticky bottom) ────────────────── */
.sub-compare-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  border-top: 2px solid var(--border-light);
  background: linear-gradient(90deg, var(--surface-alt) 0%, var(--surface) 100%);
  flex-shrink: 0;
  gap: 14px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}
.sub-compare-selected { font-size: .84rem; color: var(--text-muted); }
.sub-compare-selected strong { color: #7C3AED; font-size: 1.1rem; font-family: 'Figtree', monospace; }
.sub-compare-actions { display: flex; gap: 8px; }

/* ─── ATC Depth Selector ──────────────────────────── */
.sub-atc-depth-wrap { display: flex; align-items: center; gap: 6px; margin-left: auto; white-space: nowrap; }
.sub-atc-depth-label { font-size: .73rem; font-weight: 600; color: #92400E; }
.sub-atc-depth-select {
  font-size: .73rem;
  padding: 3px 8px;
  border: 1px solid #F59E0B;
  border-radius: 4px;
  background: #FFFBEB;
  color: #92400E;
  cursor: pointer;
  font-weight: 600;
}
.sub-atc-depth-select:focus { outline: 2px solid #F59E0B; outline-offset: 1px; }
.sub-warning-bar--l4 .sub-atc-depth-label { color: #C2410C; }
.sub-warning-bar--l4 .sub-atc-depth-select { border-color: #FB923C; background: #FFF7ED; color: #C2410C; }

/* ─── Compare Modal (Full-screen overlay) ─────────── */
.sub-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 30, 50, .72);
  backdrop-filter: blur(6px);
  z-index: 1000;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 20px;
  overflow-y: auto;
}
.sub-modal-panel {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0,0,0,.28);
  width: 100%;
  max-width: 1200px;
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  overflow: hidden;
  animation: subModalIn .22s ease;
}
.sub-modal-panel--wide { max-width: 1400px; }
@keyframes subModalIn {
  from { opacity: 0; transform: translateY(-20px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.sub-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 22px;
  border-bottom: 1px solid rgba(255,255,255,.1);
  background: linear-gradient(90deg, #4C1D95 0%, #6D28D9 100%);
  color: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  flex-shrink: 0;
}
.sub-modal-title-group { display: flex; align-items: center; gap: 10px; }
.sub-modal-title { font-size: 1.05rem; font-weight: 700; color: #fff; margin: 0; }
.sub-modal-close {
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius-sm);
  color: #fff;
  cursor: pointer;
  padding: 6px 8px;
  display: flex;
  align-items: center;
  transition: background .15s;
}
.sub-modal-close:hover { background: rgba(255,255,255,.28); }
.sub-modal-close svg { width: 16px; height: 16px; }

/* ─── Compare Table ───────────────────────────────── */
.compare-body {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.compare-scroll-hint { text-align: center; font-size: .72rem; color: var(--text-light); padding: 6px; background: var(--bg); border-radius: var(--radius-sm); }
.compare-table-wrap {
  overflow-x: auto;
  width: 100%;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--surface);
}
.compare-table { border-collapse: collapse; font-size: .78rem; min-width: 100%; }
.compare-table th, .compare-table td { border: 1px solid var(--border-light); padding: 9px 12px; text-align: left; vertical-align: top; }
.compare-corner {
  background: var(--surface-alt);
  width: 130px;
  position: sticky;
  left: 0;
  z-index: 3;
  border-right: 2px solid var(--border) !important;
}
.compare-row-label {
  background: var(--surface-alt);
  font-weight: 700;
  color: var(--text-muted);
  width: 130px;
  white-space: nowrap;
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .04em;
  position: sticky;
  left: 0;
  z-index: 3;
  border-right: 2px solid var(--border) !important;
}
.compare-th-target { background: #EDE9FE; color: #4C1D95; font-weight: 700; }
.compare-td-target { background: #FAF7FF; }
.compare-warning-cell { color: #C2410C; font-size: .72rem; }
.compare-l4-notice { padding: 10px 16px; background: #FFF7ED; border-top: 1px solid #FED7AA; color: #C2410C; font-size: .78rem; }
.compare-loading { display: flex; align-items: center; justify-content: center; gap: 14px; padding: 64px; color: var(--text-muted); }

/* 比較表差異性高亮 */
.compare-cell--diff {
  background: #FFFBEB !important; /* amber-50 */
  border-left: 3.5px solid #F59E0B !important; /* amber-500 */
}
.compare-cell--diff::before {
  content: "≠ ";
  color: #D97706; /* amber-600 */
  font-weight: 800;
}

/* 健保價差值標誌 */
.price-diff {
  font-size: 0.74rem;
  font-weight: 700;
  margin-left: 5px;
  padding: 1px 5px;
  border-radius: 4px;
  display: inline-block;
  vertical-align: middle;
}
.price-diff--up {
  color: #DC2626 !important;
  background-color: #FEE2E2 !important;
}
.price-diff--down {
  color: #15803D !important;
  background-color: #DCFCE7 !important;
}
.price-diff--same {
  color: #4B5563 !important;
  background-color: #F3F4F6 !important;
}

/* ─── Responsive for Sub Panel ────────────────────── */
@media (max-width: 639px) {
  .sub-panel { border-radius: 0; margin-bottom: 0; border-left: none; border-right: none; }
  .sub-panel-topbar { border-radius: 0; position: sticky; top: var(--header-h); }
  .sub-panel-title { font-size: .88rem; }
  .sub-back-btn { padding: 5px 12px; font-size: .78rem; }

  /* Level Tabs: 2×2 grid on mobile */
  .sub-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    overflow-x: unset;
    border-bottom: 2px solid var(--border-light);
  }
  .sub-tab {
    border-bottom: none;
    border-right: 1px solid var(--border-light);
    padding: 10px 6px;
    font-size: .76rem;
    bottom: 0;
  }
  .sub-tab:nth-child(2n) { border-right: none; }
  .sub-tab:nth-child(n+3) { border-top: 1px solid var(--border-light); }

  /* Tab 選中時底部 border 改為背景色 */
  .sub-tab.sub-tab--active { border-bottom: none !important; }
  .sub-tab[data-level="1"].sub-tab--active { background: rgba(5,150,105,.08); }
  .sub-tab[data-level="2"].sub-tab--active { background: rgba(8,145,178,.08); }
  .sub-tab[data-level="3"].sub-tab--active { background: rgba(217,119,6,.08); }
  .sub-tab[data-level="4"].sub-tab--active { background: rgba(220,38,38,.08); }

  .sub-filter-bar { gap: 6px; padding: 8px 14px; }
  .sub-filter-select { font-size: .76rem; }
  .sub-table { font-size: .74rem; }
  .sub-table td, .sub-table th { padding: 7px 7px; }
  .sub-trigger-btn { font-size: .72rem; padding: 5px 10px; min-height: 36px; }

  /* 比較表 modal on mobile */
  .sub-modal-panel { max-height: 100vh; border-radius: 0; }
}

/* ─── Print Styles ────────────────────────────────── */
@media print {
  body > *:not(#compareModal) { display: none !important; }
  #compareModal.sub-modal-backdrop {
    position: relative !important;
    background: transparent !important;
    padding: 0 !important;
    overflow: visible !important;
    display: block !important;
    z-index: auto !important;
  }
  #compareModal .sub-modal-panel {
    box-shadow: none !important;
    border: none !important;
    max-width: 100% !important;
    width: 100% !important;
    margin: 0 !important;
    padding: 0 !important;
  }
  .no-print { display: none !important; }
  .sub-modal-close { display: none !important; }
  .sub-badge-pro { display: none !important; }
  .compare-table-wrap { overflow: visible !important; }
  .compare-table { width: 100% !important; table-layout: auto !important; font-size: 11pt !important; }
  .compare-table th, .compare-table td { padding: 6px 8px !important; border: 1px solid #cbd5e1 !important; }
}

/* ─── 浮動 Tooltip 樣式 ────────────────────────────────────────── */
.drug-info-tooltip {
  position: absolute;
  z-index: 9999;
  background: rgba(255, 255, 255, 0.98);
  border: 1px solid var(--border-light);
  border-radius: 12px;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  padding: 14px;
  max-width: 380px;
  width: max-content;
  pointer-events: none;
  backdrop-filter: blur(10px);
  font-family: inherit;
  line-height: 1.5;
  transition: opacity 0.15s ease, transform 0.15s ease;
  opacity: 0;
  transform: translateY(4px);
}
.drug-info-tooltip.visible {
  opacity: 1;
  transform: translateY(0);
}
.tooltip-section-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary);
  margin-top: 8px;
  margin-bottom: 4px;
  border-left: 3px solid var(--primary);
  padding-left: 6px;
  line-height: 1.2;
}
.tooltip-badge {
  display: inline-block;
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: 4px;
  font-weight: 700;
}
.tooltip-text-box {
  background: var(--surface-alt);
  padding: 8px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text);
  border: 1px solid var(--border-light);
  max-height: 120px;
  overflow-y: auto;
  word-break: break-all;
  white-space: pre-wrap;
  margin-top: 4px;
  line-height: 1.4;
}

/* ─── 電子仿單對照樣式 ────────────────────────────────────────── */
.compare-epi-section-header {
  background: #F1F5F9 !important;
  color: #334155;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 12px 16px !important;
  letter-spacing: 0.05em;
  border-top: 2px solid var(--border) !important;
  border-bottom: 2px solid var(--border) !important;
}
.compare-epi-row {
  transition: all 0.2s ease;
}
.compare-epi-row.hidden {
  display: none !important;
}
.epi-cell-accordion {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.epi-cell-toggle {
  background: #F8FAFC;
  border: 1px solid #E2E8F0;
  border-radius: 6px;
  color: #475569;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  transition: all 0.15s ease;
  min-height: 28px;
}
.epi-cell-toggle:hover {
  background: #F1F5F9;
  color: var(--primary);
  border-color: #CBD5E1;
}
.epi-cell-toggle.active {
  background: #EFF6FF;
  color: #2563EB;
  border-color: #BFDBFE;
}
.epi-cell-content {
  position: relative;
  max-height: 180px;
  overflow-y: auto;
  font-size: 0.78rem;
  line-height: 1.5;
  padding: 8px 10px;
  border: 1px solid var(--border-light);
  border-radius: 8px;
  background: var(--surface-alt);
  margin-top: 6px;
  text-align: justify;
  word-break: break-all;
  white-space: pre-wrap;
}
.epi-zoom-btn-container {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: flex-end;
  margin-bottom: -22px;
  z-index: 5;
  pointer-events: none;
}
.epi-zoom-btn {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(4px);
  border: 1px solid #CBD5E1;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.68rem;
  font-weight: 700;
  color: #2563EB;
  cursor: pointer;
  pointer-events: auto;
  transition: all 0.15s ease;
}
.epi-zoom-btn:hover {
  background: #2563EB;
  color: white;
  border-color: #2563EB;
}
.epi-none-text {
  color: var(--text-light);
  font-style: italic;
  font-size: 0.75rem;
}
.epi-retry-btn {
  color: #DC2626;
  font-weight: 700;
  text-decoration: underline;
  cursor: pointer;
  font-size: 0.72rem;
  margin-left: 4px;
}