/* ═══════════════════════════════════════════════
   NHI 健保藥品查詢系統 - Design System CSS
   Healthcare 色盤 + Figtree / Noto Sans TC
   ═══════════════════════════════════════════════ */

/* ─── CSS 變數 ───────────────────────────────── */
:root {
  --primary:     #0891B2;
  --primary-dark:#0E7490;
  --primary-light:#BAE6FD;
  --secondary:   #22D3EE;
  --cta:         #059669;
  --cta-dark:    #047857;
  --bg:          #F0FDFF;
  --surface:     #FFFFFF;
  --surface-alt: #F8FFFE;
  --text:        #164E63;
  --text-muted:  #4B7A8A;
  --text-light:  #94A3B8;
  --border:      #A5E8F5;
  --border-light:#E0F7FA;
  --danger:      #DC2626;
  --price-color: #059669;

  --radius-sm:   6px;
  --radius:      10px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --shadow-sm:   0 1px 3px rgba(8,145,178,.08), 0 1px 2px rgba(8,145,178,.04);
  --shadow:      0 4px 12px rgba(8,145,178,.12), 0 1px 3px rgba(8,145,178,.06);
  --shadow-lg:   0 20px 40px rgba(8,145,178,.16), 0 8px 16px rgba(8,145,178,.08);
  --transition:  150ms cubic-bezier(.4,0,.2,1);
  --transition-md: 250ms cubic-bezier(.4,0,.2,1);

  --header-h: 60px;
  --panel-w:  340px;
}

/* ─── 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: 1.6;
  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 { font-family: inherit; }

/* ─── Header ─────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--surface);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  height: var(--header-h);
}
.header-inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--primary);
  font-family: 'Figtree', sans-serif;
  font-weight: 700;
  font-size: 1.1rem;
  white-space: nowrap;
}
.brand-icon { width: 26px; height: 26px; }
.sync-info {
  font-size: .75rem;
  color: var(--text-muted);
  text-align: right;
  flex-shrink: 0;
}

/* ─── Layout ─────────────────────────────────── */
.main-layout {
  flex: 1;
  display: flex;
  align-items: flex-start;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  padding: 20px;
  gap: 20px;
}

/* ─── Search Panel ───────────────────────────── */
.search-panel {
  flex-shrink: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.search-box {
  display: flex;
  gap: 10px;
  align-items: center;
}
.search-input-wrap {
  flex: 1;
  position: relative;
}
.search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}
#searchInput {
  width: 100%;
  padding: 11px 14px 11px 40px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  -webkit-appearance: none;
}
#searchInput::placeholder { color: var(--text-light); }
#searchInput:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8,145,178,.15);
}

/* ─── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 18px;
  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);
  white-space: nowrap;
  outline: none;
  min-height: 44px;
}
.btn:focus-visible { box-shadow: 0 0 0 3px rgba(8,145,178,.35); }
.btn svg { width: 16px; height: 16px; }

.btn-cta {
  background: var(--cta);
  color: #fff;
}
.btn-cta:hover { background: var(--cta-dark); box-shadow: var(--shadow); }
.btn-cta:active { transform: scale(.97); }

.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); }

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

.btn-sm { padding: 6px 12px; font-size: .8rem; min-height: 32px; }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); min-height: 36px; min-width: 36px; 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 12px;
  background: var(--primary-light);
  border-radius: var(--radius);
  border: 1px solid var(--primary);
}
.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: .78rem;
  font-weight: 500;
}
.filter-tag button {
  background: none;
  border: none;
  color: rgba(255,255,255,.8);
  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-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 10px 14px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: .9rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  min-height: 44px;
}
.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: var(--bg); }
.advanced-toggle[aria-expanded="true"] .chevron { transform: rotate(180deg); }
.advanced-toggle:hover { border-color: var(--primary); color: var(--primary); }

.advanced-filters {
  display: none;
  padding: 16px;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
}
.advanced-filters.open { display: block; }

.filter-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.filter-group--full { grid-column: 1/-1; }

.filter-group label:first-child {
  display: block;
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: .03em;
}
.filter-group select, .filter-group input[type="text"], .filter-group input[type="number"] {
  width: 100%;
  padding: 8px 12px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  color: var(--text);
  font-size: .9rem;
  outline: none;
  transition: border-color var(--transition);
  min-height: 40px;
}
.filter-group select:focus, .filter-group input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(8,145,178,.1);
}

.radio-group { display: flex; gap: 12px; flex-wrap: wrap; }
.radio-label {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .9rem;
  cursor: pointer;
  min-height: 40px;
}
.radio-label input { accent-color: var(--primary); width: 16px; height: 16px; cursor: pointer; }

.price-range {
  display: flex;
  align-items: center;
  gap: 8px;
}
.price-range span { color: var(--text-muted); flex-shrink: 0; }
.price-range input { flex: 1; }

/* ─── Results Meta ───────────────────────────── */
.results-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: .85rem;
  color: var(--text-muted);
}
.view-toggle { display: flex; gap: 4px; }
.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: 60px 20px;
  color: var(--text-muted);
  gap: 12px;
}
.empty-state svg, .no-results svg { width: 60px; height: 60px; opacity: .3; }
.empty-state h2, .no-results h2 { font-size: 1.1rem; 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: 18px; }
.no-results li { margin: 4px 0; }

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 60px 20px;
  gap: 14px;
  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: flex;
  flex-direction: column;
  gap: 10px;
}

.drug-card {
  background: var(--surface);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 16px 18px;
  cursor: pointer;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  position: relative;
}
.drug-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}
.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: 10px;
  margin-bottom: 4px;
}
.drug-name-zh {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}
.drug-price {
  flex-shrink: 0;
  font-family: 'Figtree', monospace;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--price-color);
  background: rgba(5,150,105,.08);
  padding: 2px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.drug-name-en {
  font-size: .82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  line-height: 1.3;
}
.drug-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

/* ─── Clickable Field Tags ────────────────────── */
.field-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1.5px solid var(--border);
  border-radius: 999px;
  font-size: .78rem;
  color: var(--text-muted);
  background: var(--bg);
  cursor: pointer;
  transition: all var(--transition);
  max-width: 200px;
  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: .6; flex-shrink: 0; }
.field-tag:hover svg { opacity: 1; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 9px;
  border-radius: 999px;
  font-size: .75rem;
  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-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition);
  margin-left: auto;
  min-height: 32px;
}
.detail-btn:hover { background: var(--primary-dark); }
.detail-btn svg { width: 12px; height: 12px; }

/* ─── Table View ─────────────────────────────── */
.results-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1.5px solid var(--border-light); }
.results-table { width: 100%; border-collapse: collapse; background: var(--surface); }
.results-table thead { background: var(--bg); position: sticky; top: var(--header-h); z-index: 1; }
.results-table th {
  padding: 12px 14px;
  text-align: left;
  font-size: .78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .04em;
  white-space: nowrap;
  border-bottom: 1.5px solid var(--border);
}
.results-table td {
  padding: 11px 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: .8rem; color: var(--text-muted); }
.results-table .name-cell { font-weight: 500; max-width: 200px; }
.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 Panel ───────────────────────────── */
.detail-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 40, 60, .4);
  backdrop-filter: blur(2px);
  z-index: 100;
  opacity: 0;
  transition: opacity var(--transition-md);
}
.detail-overlay.visible { opacity: 1; }

.detail-panel {
  position: fixed;
  z-index: 101;
  background: var(--surface);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  /* Mobile: Bottom Sheet */
  bottom: 0;
  left: 0;
  right: 0;
  max-height: 90vh;
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-lg);
  transform: translateY(100%);
  transition: transform var(--transition-md);
}
.detail-panel.open { transform: translateY(0); }

.detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}
.detail-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all var(--transition);
}
.detail-close:hover { background: var(--bg); color: var(--text); border-color: var(--text-muted); }
.detail-close svg { width: 16px; height: 16px; }
.detail-title { font-size: 1rem; font-weight: 700; color: var(--text); }
.detail-body { overflow-y: auto; padding: 20px; flex: 1; }

/* Detail sections */
.detail-section { margin-bottom: 20px; }
.detail-section:last-child { margin-bottom: 0; }
.detail-section-title {
  font-size: .72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .07em;
  color: var(--text-light);
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}
.detail-core-header { margin-bottom: 14px; }
.detail-name-zh { font-size: 1.25rem; font-weight: 700; color: var(--text); line-height: 1.35; }
.detail-name-en { font-size: .9rem; color: var(--text-muted); margin-top: 4px; }
.detail-price-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.detail-price {
  font-family: 'Figtree', monospace;
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--price-color);
}
.detail-price-label { font-size: .8rem; color: var(--text-muted); }

.detail-row {
  display: flex;
  gap: 8px;
  align-items: flex-start;
  margin-bottom: 8px;
  font-size: .88rem;
}
.detail-row-label {
  flex-shrink: 0;
  color: var(--text-muted);
  min-width: 80px;
  font-size: .82rem;
}
.detail-row-value { color: var(--text); word-break: break-word; }

.copy-wrap { display: flex; align-items: center; gap: 6px; }
.copy-btn {
  display: inline-flex;
  align-items: center;
  padding: 3px 8px;
  background: var(--bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: .72rem;
  cursor: pointer;
  gap: 3px;
  transition: all var(--transition);
  min-height: 28px;
}
.copy-btn:hover { border-color: var(--primary); color: var(--primary); }
.copy-btn svg { width: 12px; height: 12px; }

.detail-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.action-buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 6px; }

.btn-action {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: .82rem;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition);
  min-height: 38px;
}
.btn-action svg { width: 14px; height: 14px; }
.btn-action:hover { border-color: var(--primary); color: var(--primary); background: rgba(8,145,178,.04); text-decoration: 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); }
.btn-action.btn-action--ext:hover { background: rgba(8,145,178,.06); }

.date-range {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .88rem;
}
.date-range-bar {
  flex: 1;
  height: 6px;
  background: var(--border-light);
  border-radius: 999px;
  overflow: hidden;
}
.date-range-fill { height: 100%; background: var(--primary); border-radius: 999px; }

/* ─── Toast ─────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}
.toast {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  background: #1E293B;
  color: #fff;
  border-radius: var(--radius);
  font-size: .85rem;
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  animation: toastIn .2s ease-out;
  max-width: 340px;
  text-align: left;
}
.toast svg { width: 16px; height: 16px; flex-shrink: 0; }
.toast.toast-success { background: var(--cta-dark); }
.toast.toast-error { background: var(--danger); }
@keyframes toastIn { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }

/* ─── Footer ─────────────────────────────────── */
.site-footer {
  text-align: center;
  padding: 20px;
  font-size: .78rem;
  color: var(--text-light);
  border-top: 1px solid var(--border-light);
  background: var(--surface);
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.site-footer a { color: var(--text-muted); }
.site-footer a:hover { color: var(--primary); }

/* ─── Responsive ─────────────────────────────── */

/* Tablet+ (>=640px): 桌機版開始顯示側邊欄 */
@media (min-width: 640px) {
  .main-layout {
    flex-direction: row;
    align-items: flex-start;
    padding: 24px;
  }
  .search-panel {
    width: var(--panel-w);
    position: sticky;
    top: calc(var(--header-h) + 24px);
    max-height: calc(100vh - var(--header-h) - 48px);
    overflow-y: auto;
    flex-shrink: 0;
  }
  .results-area { flex: 1; min-width: 0; }

  /* Tablet: Detail側邊抽屜 */
  .detail-panel {
    bottom: unset;
    left: unset;
    top: 0;
    right: 0;
    height: 100vh;
    width: 420px;
    max-height: 100vh;
    border-radius: var(--radius-xl) 0 0 var(--radius-xl);
    transform: translateX(100%);
  }
  .detail-panel.open { transform: translateX(0); }
}

/* Desktop (>=1024px) */
@media (min-width: 1024px) {
  :root { --panel-w: 360px; }
  .detail-panel { width: 480px; font-size: .95rem; }
}

/* Desktop large (>=1280px) */
@media (min-width: 1280px) {
  :root { --panel-w: 380px; }
}

/* Mobile only */
@media (max-width: 639px) {
  .main-layout { flex-direction: column; padding: 12px; gap: 12px; }
  .header-inner { padding: 0 14px; }
  .brand-text { font-size: 1rem; }
  .sync-info { display: none; }
  .filter-grid { grid-template-columns: 1fr; }
  .view-toggle { display: none; } /* 手機只用卡片視圖 */
  .results-table-wrap { display: none !important; } /* 手機隱藏表格 */
}

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