*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafafa;
  --fg: #222;
  --muted: #6b7280;
  --accent: #2563eb;
  --border: #e5e7eb;
  --card-bg: #fff;
  --radius: 6px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
  font-size: 16px;
}

.wrap { max-width: 900px; margin: 0 auto; padding: 0 1rem; }

/* Header */
.site-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0.75rem 0;
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; }
.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--fg);
  text-decoration: none;
}
.site-nav a {
  margin-left: 1.25rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
}
.site-nav a:hover { color: var(--accent); }

/* Footer */
.site-footer {
  margin-top: 3rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.85rem;
  text-align: center;
}
.site-footer p { margin-bottom: 0; }

/* Typography */
main { margin-top: 2rem; margin-bottom: 2rem; }
h1 { font-size: 1.75rem; margin: 0 0 0.75rem; }
h2 { font-size: 1.35rem; margin: 1.5rem 0 0.75rem; }
h3 { font-size: 1.1rem; margin: 1rem 0 0.5rem; }
h1 + .lead, .lead { color: var(--muted); font-size: 1.05rem; margin-bottom: 1.5rem; }
.muted { color: var(--muted); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
section { margin-bottom: 2rem; }
section:last-child { margin-bottom: 0; }

p { margin-bottom: 0.75rem; }
ul, ol { padding-left: 2rem; margin-bottom: 0.75rem; }
li { margin-bottom: 0.35rem; }

.md p { margin-bottom: 0.75rem; }
.md ul, .md ol { padding-left: 2rem; margin-bottom: 0.75rem; }
.md li { margin-bottom: 0.3rem; }
.md code { background: #f3f4f6; padding: 0.15rem 0.4rem; border-radius: 3px; font-size: 0.9em; }

/* Breadcrumb */
.breadcrumb { font-size: 0.85rem; color: var(--muted); margin-bottom: 0.5rem; }
.breadcrumb a { color: var(--muted); }

/* Category tag */
.aliases { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.25rem; }
.category-tag {
  display: inline-block;
  background: #eff6ff;
  color: var(--accent);
  padding: 0.15rem 0.6rem;
  border-radius: 99px;
  font-size: 0.85rem;
}

/* Category grid */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 1rem; }
.cat-card {
  display: block;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  color: var(--fg);
  text-decoration: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.cat-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
.cat-card h3 { margin: 0 0 0.4rem; font-size: 1.05rem; color: var(--accent); }
.cat-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 0.5rem; }
.cat-card :last-child { margin-bottom: 0; }
.cat-subs { list-style: none; padding: 0; }
.cat-subs li { font-size: 0.85rem; }

/* Spec table */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}
.spec-table th, .spec-table td {
  text-align: left;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.spec-table th { font-size: 0.85rem; color: var(--muted); font-weight: 600; }
.spec-table td { font-size: 0.95rem; }
.opt-list { list-style: none; padding: 0; margin-top: 0.3rem; }
.opt-list li { font-size: 0.85rem; color: var(--muted); }

/* Variant cards */
.variant-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}
.variant-card h3 { margin: 0 0 0.5rem; }
.variant-card :last-child { margin-bottom: 0; }
.pros { color: #059669; font-size: 0.9rem; }
.cons { color: #dc2626; font-size: 0.9rem; }

/* Standard cards */
.std-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 0.75rem;
}
.std-card h2 { margin-top: 0; }
.std-card :last-child { margin-bottom: 0; }

/* Type detail */
.type-detail header { margin-bottom: 2rem; }

/* Search */
.search-input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 1rem;
  margin-bottom: 1.25rem;
  background: var(--card-bg);
  color: var(--fg);
}
.search-input:focus { outline: none; border-color: var(--accent); }

/* Hero card */
.hero-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--card-bg);
  border: 2px solid var(--accent);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--fg);
  transition: box-shadow 0.15s, transform 0.15s;
  margin-bottom: 1.5rem;
}
.hero-card:hover {
  box-shadow: 0 4px 16px rgba(37, 99, 235, 0.15);
  transform: translateY(-1px);
  text-decoration: none;
}
.hero-icon { font-size: 2rem; flex-shrink: 0; }
.hero-arrow {
  flex-shrink: 0;
  color: var(--accent);
  font-size: 1.5rem;
  margin-left: auto;
}

/* Responsive */
@media (max-width: 600px) {
  .site-header { padding: 0.5rem 0; }
  .logo { font-size: 1.1rem; }
  .site-nav a { margin-left: 0.75rem; font-size: 0.8rem; }

  main { margin-top: 1.25rem; margin-bottom: 1.25rem; }

  h1 { font-size: 1.4rem; }
  h2 { font-size: 1.15rem; margin: 1.25rem 0 0.6rem; }
  h3 { font-size: 1rem; margin: 0.9rem 0 0.4rem; }

  .lead { font-size: 0.95rem; margin-bottom: 1rem; }

  section { margin-bottom: 1.5rem; }

  .spec-table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    font-size: 0.85rem;
  }
  .spec-table th, .spec-table td { padding: 0.4rem 0.5rem; white-space: nowrap; }
  .spec-table td { white-space: normal; }

  .breadcrumb { font-size: 0.8rem; }

  .cat-grid { gap: 0.75rem; }
  .cat-card { padding: 0.75rem; }

  .type-detail header { margin-bottom: 1.5rem; }

  .site-footer { margin-top: 2rem; padding: 1rem 0; font-size: 0.8rem; }
}

@media (max-width: 400px) {
  .site-header .wrap { flex-direction: column; gap: 0.4rem; align-items: flex-start; }
  .site-nav a { margin-left: 0; margin-right: 0.9rem; }

  .wrap { padding: 0 0.8rem; }

  body { font-size: 15px; }

  .cat-grid { grid-template-columns: 1fr; }

  .spec-table th, .spec-table td { padding: 0.3rem 0.4rem; font-size: 0.8rem; }
}