:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #1c2230;
  --muted: #6b7280;
  --border: #e5e8f0;
  --accent: #3b5bdb;
  --accent-soft: #e7ecfd;
  --igs: #e03131;
  --igs-soft: #ffe3e3;
  --market: #1c7ed6;
  --market-soft: #e7f5ff;
  --exclude: #868e96;
  --shadow: 0 2px 10px rgba(20, 30, 60, 0.06);
  --radius: 14px;
}
[data-theme="dark"] {
  --bg: #14171f;
  --card: #1e222c;
  --text: #e6e8ee;
  --muted: #9aa2b1;
  --border: #2c313d;
  --accent: #748ffc;
  --accent-soft: #26304a;
  --igs: #ff8787;
  --igs-soft: #3a2224;
  --market: #74c0fc;
  --market-soft: #1e2d3d;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Segoe UI", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 17px;
  line-height: 1.75;
  transition: background .25s, color .25s;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- top nav ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 12px;
  padding: 12px 18px;
  background: color-mix(in srgb, var(--card) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.topbar .brand { font-weight: 700; font-size: 17px; margin-right: auto; letter-spacing: .3px; }
.topbar .brand small { color: var(--muted); font-weight: 400; margin-left: 6px; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 15px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card);
  color: var(--text); font-size: 15px; cursor: pointer;
}
.btn:hover { border-color: var(--accent); text-decoration: none; }
.btn.disabled { opacity: .4; pointer-events: none; }
.nav-arrows { display: inline-flex; gap: 6px; }
select.week-jump {
  padding: 8px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--card);
  color: var(--text); font-size: 15px; cursor: pointer; max-width: 220px;
}

/* ---------- layout ---------- */
.wrap { max-width: 900px; margin: 0 auto; padding: 26px 18px 60px; }
.page-title { font-size: 28px; font-weight: 800; margin: 6px 0 2px; }
.page-sub { color: var(--muted); font-size: 16px; margin: 0 0 22px; }

.legend {
  display: flex; flex-wrap: wrap; align-items: center; gap: 4px;
  font-size: 14px; color: var(--muted); margin: 0 0 22px;
  background: var(--card); border: 1px solid var(--border);
  border-radius: 10px; padding: 10px 14px;
}
.legend small { color: var(--muted); font-size: 12px; margin-right: 8px; }

.summary-box ul { margin: 8px 0 0; padding-left: 20px; }
.summary-box ul li { margin-bottom: 5px; }
.summary-box ul ul { margin: 4px 0 4px; padding-left: 20px; }
.summary-box ul ul li { margin-bottom: 3px; color: var(--muted); font-size: 15.5px; }
.summary-box {  background: var(--accent-soft); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px 20px; margin-bottom: 26px;
  font-size: 16.5px;
}
.notice {
  background: var(--igs-soft); border: 1px solid var(--border);
  border-radius: 10px; padding: 11px 15px; margin-bottom: 22px;
  font-size: 15px; color: var(--text);
}

/* ---------- directory cards ---------- */
.week-grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.week-card {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  transition: transform .12s, border-color .12s;
}
.week-card:hover { transform: translateY(-3px); border-color: var(--accent); text-decoration: none; }
.week-card .card-thumb {
  width: 100%; aspect-ratio: 16 / 9; background: var(--accent-soft);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.week-card .card-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.week-card .card-thumb .ph { color: var(--muted); font-size: 13px; }
.week-card .card-body { padding: 16px 18px 18px; }
.week-card .wk { font-size: 21px; font-weight: 800; color: var(--accent); }
.week-card .range { font-size: 15px; color: var(--muted); margin: 2px 0 8px; }
.week-card .count { font-size: 14px; color: var(--muted); }
.week-card .lead { font-size: 15.5px; margin-top: 8px; color: var(--text); }
.week-card .lead ul { margin: 6px 0 0; padding-left: 18px; }
.week-card .lead ul li { margin-bottom: 4px; }
.week-card .lead ul ul { margin: 3px 0; padding-left: 16px; }
.week-card .lead ul ul li { margin-bottom: 2px; color: var(--muted); font-size: 14px; }

/* ---------- article cards ---------- */
.article {
  display: block;
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow);
  margin-bottom: 22px;
}
.article .thumb {
  background: var(--accent-soft);
  width: 100%; aspect-ratio: 16 / 9;
  display: flex; align-items: center; justify-content: center; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.article .thumb img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.article .thumb .ph { color: var(--muted); font-size: 13px; padding: 20px; text-align: center; }
.article .body { padding: 16px 20px 18px; }
.article .date { font-size: 14px; color: var(--muted); }
.article .tags-row { margin: 6px 0 2px; }
.article h3 { margin: 4px 0 10px; font-size: 20px; line-height: 1.45; }
.article .points { margin: 0; padding-left: 20px; font-size: 16.5px; }
.article .points li { margin-bottom: 7px; }
.article .points ul { margin: 5px 0 8px; padding-left: 20px; }
.article .points ul li { margin-bottom: 4px; color: var(--muted); font-size: 15.5px; }
.article .src { margin-top: 12px; font-size: 15px; }

/* ---------- tags (prominence: 直接競品 > 同類競品 > IGS相關 > 彩票競品) ---------- */
.tag {
  display: inline-block; font-size: 13px; font-weight: 700;
  padding: 3px 11px; border-radius: 999px; margin-right: 7px; margin-bottom: 4px; vertical-align: middle;
}
/* 直接競品 — 最明顯：實心紅 */
.tag.direct { background: #e03131; color: #fff; box-shadow: 0 1px 4px rgba(224,49,49,.4); }
/* 同類競品 — 次明顯：實心橘 */
.tag.similar { background: #f76707; color: #fff; }
/* IGS 相關 — 中：藍底 */
.tag.igs { background: var(--market-soft); color: var(--market); border: 1px solid var(--market); }
/* 彩票競品 — 最不明顯：灰綠外框 */
.tag.lottery { background: transparent; color: #74a892; border: 1px solid #a9c5b8; font-weight: 600; }

/* ---------- excluded ---------- */
.excluded { margin-top: 30px; }
.excluded h2 { font-size: 17px; color: var(--muted); }
.excluded table { width: 100%; border-collapse: collapse; font-size: 15px; }
.excluded th, .excluded td { text-align: left; padding: 9px 11px; border-bottom: 1px solid var(--border); color: var(--muted); }

.foot { margin-top: 40px; text-align: center; color: var(--muted); font-size: 14px; }

@media (max-width: 560px) {
  .article .thumb { aspect-ratio: 16 / 10; }
  .topbar .brand small { display: none; }
}