/* Public Code Tainan — 實務、低調、重可讀性 */
:root {
  --ink: #1f2933;
  --ink-soft: #52606d;
  --ink-faint: #7b8794;
  --line: #e2e6ea;
  --bg: #ffffff;
  --bg-soft: #f6f8f9;
  --accent: #0d5c63;
  --accent-dark: #094349;
  --accent-soft: #e6f1f1;
  --gold: #b8860b;
  --silver: #6b7785;
  --bronze: #a96a3c;
  --radius: 10px;
  --shadow: 0 1px 2px rgba(31,41,51,.06), 0 4px 12px rgba(31,41,51,.05);
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Microsoft JhengHei", "PingFang TC", "Noto Sans TC", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255,255,255,.92);
  backdrop-filter: saturate(120%) blur(6px);
  position: sticky; top: 0; z-index: 50;
}
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { width: 34px; height: 34px; border-radius: 50%; background: var(--bg-soft); }
.brand b { font-size: 1.05rem; letter-spacing: .2px; }
.brand span { color: var(--ink-faint); font-weight: 400; font-size: .9rem; }
.nav a { color: var(--ink-soft); margin-left: 22px; font-size: .95rem; }
.nav a:hover { color: var(--accent); text-decoration: none; }

/* ---------- Hero ---------- */
.hero { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.hero .wrap { padding: 64px 20px 56px; }
.eyebrow {
  display: inline-block; font-size: .82rem; letter-spacing: 1.5px;
  color: var(--accent); font-weight: 600; text-transform: uppercase;
  margin-bottom: 14px;
}
.hero h1 { font-size: 2.1rem; line-height: 1.35; margin: 0 0 16px; max-width: 22ch; }
.hero p { font-size: 1.06rem; color: var(--ink-soft); max-width: 60ch; margin: 0 0 26px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: var(--radius); font-size: .98rem;
  font-weight: 600; border: 1px solid transparent; cursor: pointer;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); }
.btn-ghost { background: #fff; color: var(--accent); border-color: var(--line); }
.btn-ghost:hover { border-color: var(--accent); }

/* ---------- Sections ---------- */
section { padding: 56px 0; }
.section-head { margin-bottom: 30px; }
.section-head h2 { font-size: 1.5rem; margin: 0 0 8px; }
.section-head p { color: var(--ink-soft); margin: 0; max-width: 64ch; }

/* ---------- Policy band ---------- */
.policy { background: #fff; }
.policy-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.policy-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; background: var(--bg-soft);
}
.policy-card h3 { margin: 0 0 8px; font-size: 1.05rem; }
.policy-card p { margin: 0; color: var(--ink-soft); font-size: .96rem; }

/* ---------- Project cards ---------- */
.repo-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.repo-card {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; background: #fff; box-shadow: var(--shadow);
  display: flex; flex-direction: column;
}
.repo-card .meta { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.repo-card h3 { margin: 0 0 8px; font-size: 1.18rem; }
.repo-card .desc { color: var(--ink-soft); font-size: .96rem; flex: 1; margin: 0 0 16px; }
.repo-links { display: flex; flex-wrap: wrap; gap: 10px; }
.repo-links a { font-size: .9rem; padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); }
.repo-links a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.repo-links a.gh { background: #24292f; color: #fff; border-color: #24292f; }
.repo-links a.gh:hover { background: #000; color: #fff; }

/* ---------- Badges ---------- */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: .76rem; font-weight: 600; padding: 3px 9px; border-radius: 20px;
  background: var(--bg-soft); color: var(--ink-soft); border: 1px solid var(--line);
}
.badge.dept { background: var(--accent-soft); color: var(--accent-dark); border-color: transparent; }
.badge.gold { background: #fdf4e0; color: var(--gold); border-color: transparent; }
.badge.silver { background: #eef1f4; color: var(--silver); border-color: transparent; }
.badge.bronze { background: #f6ece3; color: var(--bronze); border-color: transparent; }
.badge.open { background: #e6f4ea; color: #1f7a45; border-color: transparent; }
.badge.demo { background: #e8eefc; color: #2f5bd4; border-color: transparent; }
.badge.muted { background: var(--bg-soft); color: var(--ink-faint); }

/* ---------- Results entry block ---------- */
.results-entry {
  background: var(--accent); color: #fff; border-radius: 14px;
  padding: 40px; display: flex; align-items: center; justify-content: space-between;
  gap: 24px; flex-wrap: wrap;
}
.results-entry h2 { margin: 0 0 8px; font-size: 1.5rem; }
.results-entry p { margin: 0; color: rgba(255,255,255,.85); max-width: 52ch; }
.results-entry .btn-primary { background: #fff; color: var(--accent); }
.results-entry .btn-primary:hover { background: #f0f0f0; }
.results-entry .stat { font-size: 2.4rem; font-weight: 700; line-height: 1; }

/* ---------- Footer ---------- */
.site-footer {
  border-top: 1px solid var(--line); background: var(--bg-soft);
  padding: 32px 0; color: var(--ink-faint); font-size: .9rem;
}
.site-footer .wrap { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; }

/* ---------- Results page ---------- */
.results-hero { background: var(--bg-soft); border-bottom: 1px solid var(--line); }
.results-hero .wrap { padding: 48px 20px 40px; }
.results-hero h1 { margin: 0 0 12px; font-size: 1.9rem; }
.results-hero p { color: var(--ink-soft); max-width: 64ch; margin: 0; }
.crumb { font-size: .9rem; color: var(--ink-faint); margin-bottom: 16px; }
.crumb a { color: var(--ink-soft); }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 28px 0 6px; }
.chip {
  font-size: .9rem; padding: 7px 14px; border-radius: 20px; cursor: pointer;
  border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
}
.chip.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.group-title { font-size: 1.15rem; margin: 36px 0 16px; padding-bottom: 8px; border-bottom: 2px solid var(--accent-soft); }

.proj-list { display: flex; flex-direction: column; gap: 14px; }
.proj {
  border: 1px solid var(--line); border-radius: var(--radius); background: #fff;
  overflow: hidden;
}
.proj summary {
  list-style: none; cursor: pointer; padding: 18px 22px;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.proj summary::-webkit-details-marker { display: none; }
.proj summary:hover { background: var(--bg-soft); }
.proj summary .title { font-weight: 600; font-size: 1.08rem; flex: 1; min-width: 200px; }
.proj summary .chevron { color: var(--ink-faint); transition: transform .2s; }
.proj[open] summary .chevron { transform: rotate(90deg); }
.proj .body { padding: 4px 22px 24px; border-top: 1px solid var(--line); }
.proj .body .field { margin-top: 16px; }
.proj .body .field h4 {
  margin: 0 0 4px; font-size: .82rem; letter-spacing: .5px; color: var(--accent);
  text-transform: uppercase;
}
.proj .body .field p { margin: 0; color: var(--ink-soft); }
.proj .body .links { margin-top: 18px; display: flex; flex-wrap: wrap; gap: 10px; }
.proj .body .links a, .proj .body .links span.nolink {
  font-size: .9rem; padding: 6px 12px; border: 1px solid var(--line); border-radius: 6px;
}
.proj .body .links a.gh { background: #24292f; color: #fff; border-color: #24292f; }
.proj .body .links span.nolink { color: var(--ink-faint); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .policy-grid, .repo-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 1.7rem; }
  .nav a { margin-left: 14px; font-size: .9rem; }
}
@media (max-width: 520px) {
  .brand span { display: none; }
  .results-entry { padding: 28px; }
}