:root {
  --orange: #ff7a00;
  --orange-dark: #e06b00;
  --orange-soft: #fff1e0;
  --ink: #111827;
  --ink-2: #374151;
  --ink-3: #6b7280;
  --ink-4: #9ca3af;
  --line: #e5e7eb;
  --line-soft: #f1f3f5;
  --bg: #f6f7f9;
  --card: #ffffff;
  --accent: #0ea5e9;
  --accent-dark: #0369a1;
  --shadow-sm: 0 1px 2px rgba(17, 24, 39, 0.05);
  --shadow: 0 1px 3px rgba(17, 24, 39, 0.06), 0 1px 2px rgba(17, 24, 39, 0.04);
  --shadow-lg: 0 8px 24px rgba(17, 24, 39, 0.08), 0 2px 6px rgba(17, 24, 39, 0.04);
  --radius: 10px;
  --radius-sm: 6px;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }
svg { width: 1em; height: 1em; vertical-align: middle; flex-shrink: 0; }
img { max-width: 100%; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
  min-height: 100vh;
  display: flex; flex-direction: column;
}
a { color: inherit; }
button { font-family: inherit; }

/* ================================================== topbar */
.topbar {
  background: linear-gradient(135deg, #1f2937 0%, #111827 100%);
  color: #fff;
  border-bottom: 3px solid var(--orange);
  position: sticky; top: 0; z-index: 20;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.12);
}
.topbar-inner {
  max-width: 1400px; margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.brand {
  display: flex; align-items: center; gap: 14px;
  color: #fff; text-decoration: none;
}
.brand-mark {
  width: 44px; height: 44px;
  background: var(--orange);
  color: #fff;
  border-radius: 10px;
  display: grid; place-items: center;
  box-shadow: 0 2px 8px rgba(255, 122, 0, 0.35);
  flex-shrink: 0;
}
.brand-mark svg { width: 22px; height: 22px; }
.brand-title { font-size: 17px; font-weight: 700; letter-spacing: -0.01em; }
.brand-sub { font-size: 12px; color: rgba(255, 255, 255, 0.65); margin-top: 1px; }

.topbar-right { display: flex; align-items: center; gap: 12px; }
.back-link {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255, 255, 255, 0.08);
  color: #fff; text-decoration: none;
  padding: 8px 14px 8px 12px;
  border-radius: 8px;
  font-size: 13px; font-weight: 500;
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: background 0.15s, border-color 0.15s, transform 0.15s;
}
.back-link:hover { background: rgba(255, 255, 255, 0.16); border-color: rgba(255, 255, 255, 0.22); }
.back-link:active { transform: translateY(1px); }
.back-link svg { width: 16px; height: 16px; }

/* ================================================== main */
main { max-width: 1400px; width: 100%; margin: 0 auto; padding: 24px; flex: 1; }
.sitefoot {
  padding: 24px; text-align: center;
  font-size: 12px; color: var(--ink-4);
  border-top: 1px solid var(--line);
  background: var(--card);
}

/* ================================================== filters */
.filters {
  display: flex; flex-wrap: wrap; gap: 10px;
  background: var(--card); padding: 12px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin-bottom: 18px;
  border: 1px solid var(--line);
}
.filter-search {
  position: relative; flex: 1 1 260px; min-width: 200px;
}
.filter-search svg {
  position: absolute; left: 12px; top: 50%; transform: translateY(-50%);
  width: 16px; height: 16px; color: var(--ink-4); pointer-events: none;
}
.filter-search input {
  width: 100%;
  padding: 10px 14px 10px 36px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; background: var(--card); color: var(--ink);
  font-family: inherit;
}
.filter-search input:focus {
  outline: none; border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.15);
}
.filters select, .filters button {
  padding: 10px 32px 10px 12px;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-size: 14px; background: var(--card); color: var(--ink);
  font-family: inherit;
  appearance: none; -webkit-appearance: none;
  background-image: url('data:image/svg+xml,%3Csvg xmlns="http://www.w3.org/2000/svg" width="12" height="12" viewBox="0 0 24 24" fill="none" stroke="%239ca3af" stroke-width="2.5" stroke-linecap="round" stroke-linejoin="round"%3E%3Cpath d="M6 9l6 6 6-6"/%3E%3C/svg%3E');
  background-repeat: no-repeat; background-position: right 10px center;
  min-width: 140px;
}
.filters select:hover { border-color: var(--ink-4); }
.filters select:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px rgba(255, 122, 0, 0.15); }
.filters button#clearBtn {
  cursor: pointer; background-image: none; padding: 10px 16px;
  min-width: auto; color: var(--ink-3); font-weight: 500;
}
.filters button#clearBtn:hover { background: var(--line-soft); color: var(--ink); }
.results-meta { color: var(--ink-3); font-size: 13px; margin-bottom: 14px; padding: 0 4px; font-weight: 500; }

/* ================================================== card grid */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}
.card {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--line);
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.15s, border-color 0.15s;
  display: flex; flex-direction: column;
  text-decoration: none; color: inherit;
  overflow: hidden;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  border-color: #d1d5db;
}
.card-thumb {
  aspect-ratio: 16 / 10; width: 100%;
  background: linear-gradient(135deg, #f1f3f5 0%, #e9ecef 100%);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.card-thumb img { width: 100%; height: 100%; object-fit: contain; display: block; padding: 10px; }
.card-thumb.is-placeholder img { object-fit: contain; padding: 28px; opacity: 0.6; }
.card-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 8px; }
.card-make {
  font-size: 11px; color: var(--ink-4);
  letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600;
}
.card-years {
  font-size: 12px; color: var(--accent); font-weight: 600; white-space: nowrap;
  background: #f0f9ff; padding: 2px 8px; border-radius: 10px;
}
.card-title {
  font-size: 15px; font-weight: 700; color: var(--ink);
  letter-spacing: -0.01em; line-height: 1.35;
  margin: 2px 0 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-part { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 11px; color: var(--ink-3); }
.card-meta { font-size: 12.5px; color: var(--ink-2); line-height: 1.55; display: flex; flex-wrap: wrap; gap: 10px; }
.card-meta b { color: var(--ink-4); font-weight: 500; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.04em; margin-right: 4px; }
.card-chips { display: flex; flex-wrap: wrap; gap: 5px; margin-top: auto; padding-top: 6px; }

/* ================================================== chips */
.chip {
  background: #eef2f7; color: #3a5a80;
  font-size: 11px; padding: 3px 9px; border-radius: 12px;
  display: inline-block; font-weight: 500; border: 1px solid transparent;
}
.chip.key { background: var(--orange-soft); color: var(--orange-dark); border-color: #ffe0c2; font-weight: 600; }
.chip.supplier { background: #ecfdf5; color: #047857; border-color: #a7f3d0; }
.chip.oem { background: #eff6ff; color: #1d4ed8; border-color: #bfdbfe; }
.chip.aftermarket { background: #fef3c7; color: #92400e; border-color: #fde68a; }

/* ================================================== pager */
.pager { margin-top: 24px; display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.pager button {
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  padding: 7px 14px; border-radius: var(--radius-sm);
  cursor: pointer; font-size: 14px; font-weight: 500;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
}
.pager button:hover:not([disabled]) { background: var(--line-soft); border-color: var(--ink-4); }
.pager button[disabled] { opacity: 0.35; cursor: default; }
.pager .current {
  background: var(--orange); color: #fff; border-color: var(--orange);
  box-shadow: 0 1px 4px rgba(255, 122, 0, 0.35);
}
.pager .current:hover { background: var(--orange); border-color: var(--orange); }

/* ================================================== detail */
.detail-wrap {
  background: var(--card); border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--line);
  overflow: hidden;
}
.detail-head {
  display: flex; gap: 28px; align-items: flex-start;
  padding: 28px;
  background: linear-gradient(135deg, #fafbfc 0%, #f4f6f9 100%);
  border-bottom: 1px solid var(--line);
}
.detail-hero {
  flex: 0 0 320px; aspect-ratio: 16/10;
  background: var(--card); border-radius: var(--radius-sm); overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.detail-hero img { width: 100%; height: 100%; object-fit: contain; padding: 16px; display: block; }
.detail-hero.is-placeholder img { padding: 32px; opacity: 0.6; }

.detail-title-block { flex: 1; min-width: 0; }
.detail-title .make {
  font-size: 12px; color: var(--ink-4);
  letter-spacing: 0.1em; text-transform: uppercase; font-weight: 700;
  margin-bottom: 4px;
}
.detail-title .name {
  font-size: 24px; font-weight: 700; line-height: 1.2;
  letter-spacing: -0.015em; color: var(--ink);
}
.detail-title .part {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px; color: var(--ink-3); margin-top: 6px;
}
.detail-years {
  display: inline-block; margin-top: 12px;
  background: #f0f9ff; color: var(--accent-dark);
  font-size: 15px; font-weight: 600;
  padding: 4px 12px; border-radius: 14px;
  border: 1px solid #bae6fd;
}
.detail-tags { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 6px; }
.detail-tags .chip { font-size: 12px; padding: 4px 10px; }

.detail-body { padding: 28px; display: flex; flex-direction: column; gap: 28px; }
.detail-section { }
.detail-section h3 {
  margin: 0 0 14px; font-size: 11px; color: var(--ink-4);
  text-transform: uppercase; letter-spacing: 0.12em; font-weight: 700;
  padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
.kv-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px 28px;
}
.kv-grid > div { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.kv-label { font-size: 11px; color: var(--ink-4); text-transform: uppercase; letter-spacing: 0.06em; font-weight: 600; }
.kv-value { font-size: 14px; color: var(--ink); font-weight: 500; word-break: break-word; }
.muted { color: var(--ink-4); }

/* supplier price list */
.supplier-list { display: flex; flex-direction: column; gap: 10px; }
.supplier-row {
  display: grid; grid-template-columns: 1fr auto auto;
  gap: 14px; align-items: center;
  padding: 14px 16px; background: #fafbfc;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
}
.supplier-row .name { font-weight: 600; font-size: 14px; color: var(--ink); }
.supplier-row .sub { font-size: 12px; color: var(--ink-3); margin-top: 2px; }
.supplier-row .price {
  font-size: 18px; font-weight: 700; color: var(--orange-dark);
  min-width: 90px; text-align: right;
}
.supplier-row .price small { font-size: 11px; color: var(--ink-3); font-weight: 500; }
.supplier-row .price.login-gated { color: var(--ink-3); font-size: 12px; font-weight: 500; }
.supplier-row .visit {
  background: var(--orange); color: #fff; text-decoration: none;
  padding: 8px 14px; border-radius: var(--radius-sm);
  font-size: 13px; font-weight: 600;
  display: inline-flex; align-items: center; gap: 6px;
  transition: background 0.15s, transform 0.15s;
}
.supplier-row .visit:hover { background: var(--orange-dark); }
.supplier-row .visit:active { transform: translateY(1px); }
.supplier-row .visit svg { width: 14px; height: 14px; }

/* coverage table */
.coverage-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.coverage-table th, .coverage-table td {
  text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--line-soft);
}
.coverage-table th {
  font-size: 10.5px; color: var(--ink-4); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.06em;
  background: var(--line-soft);
}
.coverage-table tr:last-child td { border-bottom: none; }

.empty {
  background: var(--card); padding: 60px 40px;
  border-radius: var(--radius); text-align: center;
  color: var(--ink-4); border: 1px dashed var(--line);
}

/* ================================================== responsive */
@media (max-width: 720px) {
  .topbar-inner { padding: 12px 16px; gap: 12px; flex-wrap: wrap; }
  .brand-title { font-size: 15px; }
  .brand-sub { display: none; }
  .back-link span { display: none; }
  .back-link { padding: 8px; }
  main { padding: 16px; }
  .detail-head { flex-direction: column; padding: 20px; gap: 18px; }
  .detail-hero { flex-basis: auto; width: 100%; }
  .detail-title .name { font-size: 20px; }
  .detail-body { padding: 20px; }
  .supplier-row { grid-template-columns: 1fr; gap: 8px; }
  .supplier-row .price { text-align: left; }
}