/* ============================================================
   未來已來 · AI 編程動畫創作大賽 —— 全站共用樣式
   ============================================================ */
:root {
  --bg-dark: #091a2a;
  --bg-darker: #050f1a;
  --bg-light: #f0f4f8;
  --primary: #0088cc;
  --accent: #00d2ff;
  --gold: #ffb800;
  --text-dark: #1b2735;
  --text-light: #ffffff;
  --muted: #8aa0b4;
  --line: rgba(255, 255, 255, 0.12);
  --card: #ffffff;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(9, 26, 42, 0.12);
  --nav-h: 64px;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Microsoft JhengHei', 'PingFang TC', 'Noto Sans TC', 'Segoe UI', sans-serif;
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------------- 導覽列 ---------------- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(5, 15, 26, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
}

.site-nav .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.brand .mark {
  width: 38px;
  height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 18px;
  color: #04121f;
  box-shadow: 0 0 18px rgba(0, 210, 255, 0.5);
}

.brand .brand-text { line-height: 1.15; }
.brand .brand-text b { display: block; font-size: 16px; letter-spacing: 1px; }
.brand .brand-text small { color: var(--muted); font-size: 11px; letter-spacing: 1px; }

.nav-links { display: flex; align-items: center; gap: 6px; }

.nav-links a {
  color: #cfe0ee;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 15px;
  letter-spacing: 1px;
  transition: all .18s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.1;
}
.nav-links a small { font-size: 9px; color: var(--muted); letter-spacing: 2px; }
.nav-links a:hover { color: #fff; background: rgba(255, 255, 255, 0.06); }
.nav-links a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(0, 210, 255, 0.18), rgba(0, 136, 204, 0.18));
  box-shadow: inset 0 0 0 1px rgba(0, 210, 255, 0.35);
}
.nav-links a.active small { color: var(--accent); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  color: #fff;
  font-size: 20px;
  padding: 6px 12px;
  border-radius: 8px;
  cursor: pointer;
}

/* ---------------- 頁首橫幅 ---------------- */
.page-hero {
  background:
    radial-gradient(1200px 500px at 70% -20%, rgba(0, 210, 255, 0.28), transparent 60%),
    radial-gradient(900px 500px at 10% 110%, rgba(0, 136, 204, 0.3), transparent 60%),
    linear-gradient(160deg, #071726, #04121f);
  color: #fff;
  padding: 56px 24px 46px;
  text-align: center;
  border-bottom: 1px solid var(--line);
}
.page-hero .eyebrow {
  color: var(--gold);
  letter-spacing: 4px;
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}
.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  margin: 12px 0 8px;
  font-weight: 900;
  letter-spacing: 2px;
}
.page-hero h1 .accent { color: var(--accent); }
.page-hero p { color: #b7c9d9; max-width: 640px; margin: 0 auto; }

/* ---------------- 通用容器 ---------------- */
.container { max-width: 1160px; margin: 0 auto; padding: 40px 24px 64px; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 8px 0 24px;
}
.section-head h2 { font-size: 1.6rem; margin: 0; font-weight: 800; }
.section-head small { color: var(--muted); letter-spacing: 2px; font-size: 12px; text-transform: uppercase; }
.section-head .count { margin-left: auto; color: var(--primary); font-weight: 700; }

/* ---------------- 作品網格 ---------------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 22px;
}

.work-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .2s ease, box-shadow .2s ease;
  display: flex;
  flex-direction: column;
  position: relative;
}
.work-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(9, 26, 42, 0.2);
}

.work-thumb {
  aspect-ratio: 4 / 3;
  display: block;
  position: relative;
  overflow: hidden;
  background: #04121f;
}
.work-thumb svg { width: 100%; height: 100%; display: block; }

.work-thumb .no-tag {
  position: absolute;
  top: 10px;
  left: 10px;
  background: rgba(0, 0, 0, 0.55);
  color: #fff;
  font-size: 11px;
  padding: 3px 9px;
  border-radius: 20px;
  letter-spacing: 1px;
}
.work-thumb .type-tag {
  position: absolute;
  bottom: 10px;
  right: 10px;
  font-size: 11px;
  color: #fff;
  padding: 3px 9px;
  border-radius: 20px;
  background: rgba(0, 0, 0, 0.45);
  letter-spacing: 1px;
}

.work-card .meta { padding: 14px 16px 16px; }
.work-card .meta h3 { margin: 0 0 4px; font-size: 1.15rem; font-weight: 800; }
.work-card .meta .team { color: var(--primary); font-size: 13px; font-weight: 600; }
.work-card .meta p { color: #6b7a8a; font-size: 13px; margin: 6px 0 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ---------------- 隊伍列表 ---------------- */
.teams-table {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.teams-row {
  display: grid;
  grid-template-columns: 56px 1.3fr 1fr 1.7fr;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid #eef2f6;
}
.teams-row:last-child { border-bottom: none; }
.teams-row.head {
  background: var(--bg-dark);
  color: #fff;
  font-weight: 700;
  letter-spacing: 1px;
  font-size: 13px;
}
.teams-row .rank { font-weight: 900; color: var(--primary); font-size: 15px; }
.teams-row .t-name { font-weight: 800; }
.teams-row .t-school { color: #6b7a8a; }
.teams-row .t-org { color: #5b6b7b; font-size: 14px; }

/* ---------------- 示例卡片 ---------------- */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 22px;
}
.demo-card {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.demo-card .canvas-wrap { aspect-ratio: 16 / 10; background: #04121f; position: relative; }
.demo-card .canvas-wrap canvas { display: block; width: 100%; height: 100%; }
.demo-card .demo-body { padding: 16px 20px 20px; }
.demo-card h3 { margin: 0 0 6px; font-size: 1.15rem; }
.demo-card p { color: #6b7a8a; font-size: 14px; margin: 0 0 10px; }
.demo-card .hint { color: var(--primary); font-size: 12px; }

/* ---------------- 單作品頁 ---------------- */
.work-stage {
  position: fixed;
  inset: 0;
  background: #04070d;
}
.work-stage canvas { display: block; }

.work-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
}
.work-overlay .top {
  position: absolute;
  top: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}
.work-overlay a.back {
  pointer-events: auto;
  background: rgba(5, 15, 26, 0.7);
  color: #fff;
  border: 1px solid var(--line);
  padding: 9px 16px;
  border-radius: 10px;
  font-size: 14px;
  backdrop-filter: blur(6px);
  transition: background .2s;
  white-space: nowrap;
}
.work-overlay a.back:hover { background: rgba(0, 210, 255, 0.2); }

.work-title-card {
  pointer-events: auto;
  text-align: right;
  color: #fff;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
}
.work-title-card .tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 2px;
  padding: 3px 10px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  margin-bottom: 8px;
}
.work-title-card h1 { margin: 0; font-size: clamp(1.4rem, 4vw, 2.4rem); font-weight: 900; }
.work-title-card .team { color: var(--accent); font-size: 14px; margin-top: 4px; }

.work-overlay .bottom {
  position: absolute;
  bottom: 20px;
  left: 20px;
  right: 20px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}
.work-overlay .desc {
  color: #dcebf5;
  max-width: 520px;
  font-size: 13.5px;
  background: rgba(5, 15, 26, 0.55);
  padding: 10px 14px;
  border-radius: 10px;
  backdrop-filter: blur(6px);
}
.work-overlay .controls-hint {
  color: #cfe0ee;
  font-size: 12px;
  white-space: nowrap;
  text-align: right;
}
.work-overlay .controls-hint span { display: block; }
.work-overlay .nav-work {
  pointer-events: auto;
  display: flex;
  gap: 10px;
}
.work-overlay .nav-work a {
  background: rgba(5, 15, 26, 0.7);
  color: #fff;
  border: 1px solid var(--line);
  padding: 9px 14px;
  border-radius: 10px;
  font-size: 14px;
  backdrop-filter: blur(6px);
  transition: background .2s;
}
.work-overlay .nav-work a:hover { background: rgba(0, 210, 255, 0.2); }
.work-overlay .nav-work a.disabled { opacity: 0.35; pointer-events: none; }

/* ---------------- 頁尾 ---------------- */
.site-footer {
  background: var(--bg-darker);
  color: #9fb4c6;
  padding: 40px 24px;
  text-align: center;
  border-top: 1px solid var(--line);
  font-size: 13px;
}
.site-footer .foot-title { color: #fff; font-weight: 800; font-size: 16px; margin-bottom: 6px; }
.site-footer a { color: var(--accent); }

/* ---------------- 響應式 ---------------- */
@media (max-width: 820px) {
  .nav-links {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(5, 15, 26, 0.98);
    padding: 10px 16px 16px;
    border-bottom: 1px solid var(--line);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { flex-direction: row; gap: 8px; width: 100%; justify-content: flex-start; }
  .nav-toggle { display: block; }

  .teams-row { grid-template-columns: 40px 1fr 1fr; }
  .teams-row .t-org { grid-column: 2 / -1; }

  .work-overlay .bottom { flex-wrap: wrap; }
  .work-overlay .desc { max-width: 100%; }
}