:root {
  --bg: #fbfaf8;
  --fg: #1d1d1f;
  --muted: #6b6b70;
  --line: #e6e3de;
  --accent: #3b5bdb;
  --surface: #ffffff;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141416;
    --fg: #ececee;
    --muted: #9a9aa2;
    --line: #2c2c31;
    --accent: #8ca3ff;
    --surface: #1b1b1f;
    color-scheme: dark;
  }
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC",
    "Microsoft JhengHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

/* ── home ─────────────────────────────────────────────────────────────── */

.landing {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 16px 64px;
}

.landing section {
  margin-bottom: 40px;
}

.landing h2 {
  margin: 0 0 6px;
  font-size: 18px;
  line-height: 1.4;
}

.landing p {
  margin: 0 0 12px;
}

.landing code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 7vw, 48px);
  line-height: 1.2;
  letter-spacing: 0.01em;
}

.hero .tagline {
  margin: 6px 0 20px;
  color: var(--muted);
  font-size: 19px;
}

.features {
  display: grid;
  gap: 12px;
}

.feature {
  padding: 18px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature p {
  margin: 0;
}

.landing .english {
  padding-top: 32px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.landing .english h2 {
  color: var(--fg);
}

/* ── legal documents ──────────────────────────────────────────────────── */

.topbar {
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  max-width: 760px;
  margin: 0 auto;
  padding: 14px 16px;
}

.brand {
  color: var(--fg);
  font-weight: 600;
  text-decoration: none;
}

.doc {
  flex: 1;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 16px 64px;
}

.doc h1 {
  margin: 0 0 4px;
  font-size: 30px;
  line-height: 1.3;
}

.doc .meta {
  margin: 0 0 32px;
  color: var(--muted);
  font-size: 14px;
}

.doc h2 {
  margin: 40px 0 8px;
  padding-top: 8px;
  font-size: 20px;
  line-height: 1.4;
}

.doc h3 {
  margin: 24px 0 4px;
  font-size: 16px;
}

.doc p,
.doc ul,
.doc ol {
  margin: 0 0 14px;
}

.doc ul,
.doc ol {
  padding-left: 1.4em;
}

.doc li {
  margin-bottom: 4px;
}

.doc code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.88em;
  overflow-wrap: anywhere;
}

.doc .toc {
  margin: 0 0 8px;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.doc .toc ol {
  margin: 0;
}

.doc .note {
  padding: 12px 16px;
  background: var(--surface);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
}

.doc blockquote {
  margin: 0 0 14px;
  padding: 12px 16px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 15px;
}

.table-wrap {
  margin: 0 0 16px;
  overflow-x: auto;
}

.doc table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}

.doc th,
.doc td {
  padding: 8px 10px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.doc th {
  background: var(--surface);
  white-space: nowrap;
}

/* ── footer ───────────────────────────────────────────────────────────── */

.site-footer {
  padding: 20px 16px 28px;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px 20px;
  margin-bottom: 6px;
}

.site-footer a {
  color: var(--muted);
}

.site-footer a:hover {
  color: var(--fg);
}