/* course.monolab.world 入口頁（2026-10-16 簡易版）。之後換成 monolab-education 平台的總站。 */
:root {
  --bg: #0e0f11;
  --surface: #16171a;
  --surface-2: #1d1f23;
  --line: #2a2c31;
  --ink: #ecebe6;
  --ink-2: #b9b8b2;
  --ink-3: #85847f;
  --accent: #5fe0c8;
  --accent-ink: #08201c;
  --radius: 10px;
  --font-body: "IBM Plex Sans", "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
  --font-display: "Noto Serif TC", "Songti TC", serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}
a { color: inherit; }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.top, main, .foot { width: min(1080px, 100% - 32px); margin-inline: auto; }

.top { display: flex; align-items: center; padding: 22px 0; border-bottom: 1px solid var(--line); }
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
.brand img { height: 22px; width: auto; display: block; }
.brand-sub { font-size: 15px; color: var(--ink-2); padding-left: 12px; border-left: 1px solid var(--line); }

.intro { padding: clamp(48px, 9vw, 104px) 0 clamp(32px, 6vw, 56px); }
.kicker { margin: 0 0 12px; font-family: var(--font-mono); font-size: 13px; letter-spacing: .08em; color: var(--ink-3); }
h1 { margin: 0; font-family: var(--font-display); font-weight: 500; font-size: clamp(40px, 7vw, 72px); line-height: 1.1; }
.lead { margin: 20px 0 0; max-width: 36em; font-size: clamp(16px, 2vw, 18px); color: var(--ink-2); }

.group { padding: 0 0 clamp(40px, 6vw, 64px); }
.group h2 { margin: 0 0 18px; font-family: var(--font-display); font-weight: 500; font-size: clamp(22px, 3vw, 28px); }

.cards { list-style: none; margin: 0; padding: 0; display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.card { display: flex; flex-direction: column; overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.cover { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; background: var(--surface-2); border-bottom: 1px solid var(--line); }
.card-body { display: flex; flex-direction: column; flex: 1; padding: 20px 22px 20px; }
.cover-contain { object-fit: contain; background: #050505; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.tag { font-size: 12px; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-2); }
.tag-live { border-color: var(--accent); color: var(--accent); }
.meta { font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }
.card h3 { margin: 16px 0 8px; font-family: var(--font-display); font-weight: 500; font-size: 24px; line-height: 1.3; }
.card p { margin: 0 0 18px; color: var(--ink-2); font-size: 15px; }
.links { margin-top: auto; display: flex; flex-wrap: wrap; gap: 8px; }
.btn { display: inline-flex; align-items: center; min-height: 40px; padding: 0 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--surface-2); text-decoration: none; font-size: 14px; }
.btn:hover { border-color: var(--ink-3); }
.btn-main { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn-main:hover { filter: brightness(1.06); border-color: var(--accent); }

.rows { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.rows li { border-bottom: 1px solid var(--line); }
.rows a { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; padding: 14px 4px; text-decoration: none; }
.rows a:hover .row-title { text-decoration: underline; text-underline-offset: 4px; }
.row-title { font-size: 16px; }
.row-meta { flex-shrink: 0; font-family: var(--font-mono); font-size: 12px; color: var(--ink-3); }

.foot { padding: 28px 0 40px; border-top: 1px solid var(--line); color: var(--ink-3); font-size: 14px; }
.foot p { margin: 0 0 6px; }
.foot a { text-underline-offset: 3px; }
.fine { font-size: 12px; }

@media (max-width: 480px) {
  .rows a { flex-direction: column; gap: 2px; }
}