:root {
  --bg: #f4f7f6;
  --surface: #ffffff;
  --ink: #0f172a;
  --muted: #64748b;
  --brand: #0f766e;
  --brand-soft: #ccfbf1;
  --border: #e2e8f0;
  --price: #0f766e;
  --danger-soft: #fff7ed;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.06), 0 8px 24px rgba(15, 23, 42, 0.06);
  --header-h: auto;
  --tap: 44px;
  --font: "Segoe UI", "PingFang HK", "Noto Sans TC", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.45;
  min-height: 100vh;
}

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  border: 0;
}
.hidden { display: none !important; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244, 247, 246, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px 14px;
}

.header-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  max-width: 1100px;
  margin: 0 auto 12px;
}

.titles h1 {
  margin: 0;
  font-size: clamp(1.25rem, 4vw, 1.6rem);
  letter-spacing: 0.02em;
}
.subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}
.validity {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: var(--brand);
  font-weight: 600;
}

.cart-btn {
  position: relative;
  flex-shrink: 0;
  width: var(--tap);
  height: var(--tap);
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
.cart-btn:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.cart-btn:active { transform: scale(0.96); }
.cart-badge {
  position: absolute;
  top: -4px;
  right: -4px;
  min-width: 20px;
  height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 20px;
  text-align: center;
  box-shadow: 0 0 0 2px var(--bg);
}

.controls {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 8px;
  max-width: 1100px;
  margin: 0 auto;
  align-items: stretch;
}
.search-wrap,
.filter-wrap {
  min-width: 0;
}

.search-wrap input,
.filter-wrap select {
  width: 100%;
  min-height: var(--tap);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 12px;
  font: inherit;
  font-size: 1rem;
  background: var(--surface);
  color: var(--ink);
  appearance: none;
}
.search-wrap input {
  padding-left: 12px;
  padding-right: 10px;
}
.search-wrap input:focus,
.filter-wrap select:focus {
  outline: 2px solid var(--brand);
  outline-offset: 1px;
  border-color: var(--brand);
}
.filter-wrap select {
  background-image: linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position: calc(100% - 18px) calc(50% - 3px), calc(100% - 12px) calc(50% - 3px);
  background-size: 6px 6px, 6px 6px;
  background-repeat: no-repeat;
  padding-right: 36px;
}


.list-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.6fr) minmax(0, 0.85fr);
  gap: 4px;
  max-width: 1100px;
  margin: 0 auto;
  padding: 6px 16px 4px;
  position: sticky;
  top: var(--sticky-controls, 0);
  z-index: 15;
  background: rgba(244, 247, 246, 0.95);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.list-head-btn {
  appearance: none;
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: none;
  min-height: 28px;
  padding: 4px 6px;
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
  justify-content: flex-start;
}
.list-head-btn[data-sort="price"] {
  justify-content: flex-end;
}
.list-head-btn:active {
  background: #e2e8f0;
}
.list-head-btn.is-active {
  color: var(--brand);
  background: var(--brand-soft);
}
.list-head-btn .sort-ind::before {
  content: "↕";
  font-size: 0.7rem;
  opacity: 0.45;
  font-weight: 700;
}
.list-head-btn.is-active[aria-sort="ascending"] .sort-ind::before {
  content: "↑";
  opacity: 1;
}
.list-head-btn.is-active[aria-sort="descending"] .sort-ind::before {
  content: "↓";
  opacity: 1;
}

.results {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 16px 32px;
  display: grid;
  gap: 10px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: grid;
  gap: 8px;
}
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}
.code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.82rem;
  color: var(--muted);
  background: #f1f5f9;
  padding: 3px 8px;
  border-radius: 8px;
  word-break: break-all;
}
.price {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--price);
  white-space: nowrap;
  text-align: right;
}
.price .unit {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  margin-left: 2px;
}
.price.na {
  color: var(--muted);
  background: var(--danger-soft);
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 1rem;
}
.name-zh {
  font-size: 0.95rem;
  font-weight: 650;
  margin: 0;
}
.name-en {
  margin: 0;
  color: #334155;
  font-size: 0.82rem;
}
.meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  align-items: center;
  font-size: 0.8rem;
  color: var(--muted);
}
.chip {
  display: inline-flex;
  align-items: center;
  background: var(--brand-soft);
  color: var(--brand);
  border-radius: 999px;
  padding: 3px 10px;
  font-weight: 600;
  font-size: 0.75rem;
  max-width: 100%;
}
.spec {
  color: var(--muted);
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 48px 16px;
  font-size: 1rem;
}

.site-footer {
  max-width: 1100px;
  margin: 0 auto;
  padding: 8px 16px 40px;
  color: var(--muted);
  font-size: 0.82rem;
}
.site-footer ul {
  margin: 0 0 8px;
  padding-left: 1.1em;
}
.site-footer li { margin-bottom: 4px; }
.currency { margin: 0; font-weight: 600; }

/* Desktop denser table-like layout */
@media (min-width: 800px) {
  .results {
    gap: 0;
    padding-top: 8px;
  }
  .card {
    border-radius: 0;
    box-shadow: none;
    border-left: none;
    border-right: none;
    border-top: none;
    padding: 12px 8px;
    grid-template-columns: 140px 1fr auto;
    grid-template-rows: auto auto;
    column-gap: 16px;
    align-items: start;
  }
  .card:first-child {
    border-top: 1px solid var(--border);
    border-radius: 12px 12px 0 0;
  }
  .card:last-child {
    border-radius: 0 0 12px 12px;
  }
  .card-top {
    grid-column: 1;
    grid-row: 1 / span 2;
    flex-direction: column;
    gap: 8px;
  }
  .card-top .price-row {
    justify-content: flex-start;
  }
  .card-top .price {
    text-align: left;
    font-size: 1.2rem;
  }
  .names {
    grid-column: 2;
    grid-row: 1;
  }
  .meta {
    grid-column: 2;
    grid-row: 2;
  }
  .code { align-self: flex-start; }
}

@media (min-width: 800px) {
  /* keep price on the right on wide screens */
  .card {
    grid-template-columns: 130px 1fr 160px;
  }
  .card-top {
    display: contents;
  }
  .code {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
  }
  .names {
    grid-column: 2;
    grid-row: 1;
  }
  .meta {
    grid-column: 2;
    grid-row: 2;
  }
  .price-row {
    grid-column: 3;
    grid-row: 1 / span 2;
    align-self: center;
    justify-content: flex-end;
  }
  .price-row .price {
    text-align: right;
    font-size: 1.25rem;
  }
}

.price-row {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-shrink: 0;
}
.price-row .price {
  text-align: right;
}
.add-cart {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  min-width: 36px;
  min-height: 36px;
  padding: 0;
  border: none;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.add-cart:active { opacity: 0.9; transform: scale(0.96); }
.add-cart.in-cart {
  background: var(--brand-soft);
  color: var(--brand);
}
.add-cart:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}
.add-cart-icon {
  display: block;
}

.cart-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.45);
  z-index: 40;
}
.cart-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(100vw, 420px);
  height: 100%;
  height: 100dvh;
  background: var(--surface);
  z-index: 50;
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 32px rgba(15, 23, 42, 0.18);
  transform: translateX(100%);
  transition: transform 0.22s ease;
}
.cart-drawer.open {
  transform: translateX(0);
}
.cart-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.cart-drawer-head h2 {
  margin: 0;
  font-size: 1.1rem;
}
.cart-close {
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 10px;
  background: #f1f5f9;
  color: var(--ink);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.cart-drawer-body {
  flex: 1;
  overflow: auto;
  padding: 12px 16px;
  -webkit-overflow-scrolling: touch;
}
.cart-empty {
  text-align: center;
  color: var(--muted);
  padding: 40px 12px;
}
.cart-line {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 6px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}
.cart-line-name {
  font-weight: 650;
  font-size: 0.92rem;
  margin: 0;
}
.cart-line-en {
  margin: 2px 0 0;
  font-size: 0.78rem;
  color: var(--muted);
}
.cart-line-meta {
  font-size: 0.75rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.cart-line-price {
  font-weight: 700;
  color: var(--price);
  font-size: 0.95rem;
  text-align: right;
  white-space: nowrap;
}
.cart-line-controls {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-top: 4px;
}
.qty-wrap {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.qty-btn {
  width: 40px;
  height: 40px;
  border: none;
  background: #f8fafc;
  color: var(--ink);
  font-size: 1.1rem;
  cursor: pointer;
}
.qty-val {
  min-width: 36px;
  text-align: center;
  font-weight: 650;
  font-size: 0.95rem;
}
.cart-remove {
  border: none;
  background: transparent;
  color: #b91c1c;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  min-height: 40px;
  padding: 0 8px;
}
.cart-drawer-foot {
  padding: 12px 16px calc(16px + env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--border);
  display: grid;
  gap: 10px;
}
.cart-total-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 1rem;
}
.cart-total-row strong {
  font-size: 1.25rem;
  color: var(--price);
}
.cart-clear {
  min-height: var(--tap);
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
}

@media (min-width: 800px) {
  .card {
    grid-template-columns: 130px 1fr auto;
  }
}