:root {
  --bg: #ffffff;
  --fg: #111113;
  --muted: #6b6b72;
  --line: #e7e7ea;
  --hover: #f5f5f7;
  --max: 960px;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b0b0c; --fg: #f2f2f3; --muted: #9a9aa2; --line: #25252a; --hover: #151518; }
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
img { max-width: 100%; }

.site-header, main, .site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: 24px;
}
.site-header {
  display: flex; justify-content: space-between; align-items: center;
  padding-block: 24px;
}
.brand { font-weight: 700; letter-spacing: -0.01em; text-decoration: none; }
.site-header nav { display: flex; gap: 20px; }
.site-header nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
.site-header nav a:hover { color: var(--fg); }

.hero { padding-block: 96px 72px; }
.eyebrow { color: var(--muted); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 12px; }
h1 { font-size: clamp(2rem, 6vw, 3.5rem); line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 24px; }
.lead { font-size: 1.15rem; color: var(--muted); max-width: 40em; }
h2 { font-size: 14px; color: var(--muted); letter-spacing: 0.08em; text-transform: uppercase; font-weight: 600; margin: 0 0 20px; }

.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.button {
  display: inline-block; padding: 10px 20px; border-radius: 999px;
  background: var(--fg); color: var(--bg); text-decoration: none; font-size: 15px; font-weight: 500;
  border: 1px solid var(--fg);
}
.button.ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.button:hover { opacity: 0.85; }

.works { padding-block: 48px; border-top: 1px solid var(--line); }
.grid { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 400px), 1fr)); }
.card {
  display: flex; gap: 16px; align-items: flex-start; height: 100%;
  padding: 20px; border: 1px solid var(--line); border-radius: 16px; text-decoration: none;
  transition: background 0.15s, border-color 0.15s;
}
.card:hover { background: var(--hover); border-color: var(--muted); }
.card img { width: 64px; height: 64px; border-radius: 14px; flex: none; }
.card h3 { margin: 0 0 4px; font-size: 17px; }
.card p { margin: 0 0 8px; color: var(--muted); font-size: 15px; line-height: 1.55; }
.meta { color: var(--muted); font-size: 13px; }
.platforms { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 6px; }
.platforms li {
  font-size: 12px; line-height: 1; padding: 5px 9px; border-radius: 999px;
  border: 1px solid var(--line); color: var(--muted);
}
.works + .works { border-top: 0; padding-top: 0; }

.work { padding-block: 48px 72px; max-width: 720px; }
.back { color: var(--muted); text-decoration: none; font-size: 15px; }
.back:hover { color: var(--fg); }
.work-head { display: flex; gap: 20px; align-items: center; margin: 32px 0 24px; }
.work-head img { width: 96px; height: 96px; border-radius: 22px; flex: none; }
.work-head h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); margin: 0; }
.work-head .meta { margin: 4px 0 8px; }

.site-footer {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px;
  padding-block: 32px 48px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px;
}
.site-footer a { text-decoration: none; }
.site-footer a:hover { color: var(--fg); }

@media (max-width: 480px) {
  .site-header, main, .site-footer { padding-inline: 16px; }
  .site-header { flex-wrap: wrap; gap: 12px; padding-block: 20px 16px; }
  .site-header .brand { white-space: nowrap; }
  .site-header nav { width: 100%; gap: 14px; align-items: center; }
  .site-header nav a { white-space: nowrap; }
  .lang-menu { margin-left: auto; }
  .hero { padding-block: 56px 48px; }
  .work-head { flex-direction: column; align-items: flex-start; }
}

.docs { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--line); }
.docs h2 { margin-bottom: 12px; }
.docs ul { list-style: none; margin: 0; padding: 0; display: flex; flex-wrap: wrap; gap: 8px 20px; }
.docs a { color: var(--fg); text-decoration: none; border-bottom: 1px solid var(--line); }
.docs a:hover { border-color: var(--fg); }

.doc h1 { font-size: clamp(1.6rem, 4vw, 2.2rem); margin: 28px 0 4px; }
.doc h2 { font-size: 15px; letter-spacing: 0; text-transform: none; color: var(--fg); margin: 40px 0 8px; }
.doc h3 { font-size: 17px; margin: 28px 0 6px; }
.doc p, .doc li { color: var(--muted); }
.doc ul { padding-left: 1.2em; }

.work h3 { font-size: 15px; margin: 32px 0 8px; }
.work ul { margin: 0 0 16px; padding-left: 1.2em; color: var(--muted); }
.work li { margin-bottom: 4px; }

.lang { display: flex; flex-wrap: wrap; gap: 14px; font-size: 14px; }
.lang a { color: var(--muted); }
.lang a:hover { color: var(--fg); }
.lang [aria-current] { color: var(--fg); font-weight: 500; }

.site-link { margin: 12px 0 0; font-size: 14px; }
.site-link a { color: var(--muted); }
.site-link a:hover { color: var(--fg); }

.lang-menu { position: relative; }
.lang-menu summary {
  list-style: none; cursor: pointer; white-space: nowrap;
  border: 1px solid var(--line); border-radius: 999px; padding: 4px 12px;
  color: var(--muted); font-size: 15px;
}
.lang-menu summary::-webkit-details-marker { display: none; }
.lang-menu summary:hover, .lang-menu[open] summary { color: var(--fg); border-color: var(--muted); }
.lang-menu ul {
  position: absolute; right: 0; top: calc(100% + 8px); z-index: 10;
  list-style: none; margin: 0; padding: 6px; min-width: 150px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.12);
}
.lang-menu li a, .lang-menu li span {
  display: block; padding: 7px 12px; border-radius: 8px; font-size: 14px; text-decoration: none; color: var(--muted);
}
.lang-menu li a:hover { background: var(--hover); color: var(--fg); }
.lang-menu li [aria-current] { color: var(--fg); font-weight: 500; }

.app-langs { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 24px; font-size: 13px; color: var(--muted); }
.app-langs .tag { border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; }

.card-tags { display: flex; flex-direction: column; align-items: flex-start; gap: 6px; }
.card-tags .langs li { border-style: dashed; }
.work .platforms { padding-left: 0; margin: 0; }