:root {
  --bg: #f6f6f4;
  --surface: #ffffff;
  --text: #141414;
  --text-dim: #5a5a5a;
  --line: rgba(20, 20, 20, 0.08);
  --accent: #1f4eea;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  --serif: "Source Serif Pro", "Georgia", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Inter", "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d10;
    --surface: #11151a;
    --text: #e6e8ec;
    --text-dim: #8b909a;
    --line: rgba(255, 255, 255, 0.08);
    --accent: #22d3a4;
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 96px;
}

header.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

header.brand .logo {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: #f1c500;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 700;
  color: #141414;
  letter-spacing: 0.08em;
}

header.brand h1 {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  margin: 0;
}

header.brand .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-top: 2px;
}

nav.lang {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-left: auto;
}

nav.lang a {
  color: var(--text-dim);
  text-decoration: none;
  margin-left: 14px;
}

nav.lang a.active {
  color: var(--accent);
}

h1.page, h2.page {
  font-family: var(--serif);
  font-weight: 600;
}

h1.page { font-size: 32px; margin: 0 0 8px; }
h2 { font-family: var(--serif); font-size: 22px; font-weight: 600; margin: 36px 0 12px; }
h3 { font-size: 16px; font-weight: 700; margin: 24px 0 8px; }

p { margin: 0 0 14px; color: var(--text); }
.dim { color: var(--text-dim); }

.meta {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 24px;
}

ul { padding-left: 22px; }
li { margin: 6px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 18px 0 26px;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

th {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  font-weight: 600;
}

a { color: var(--accent); }

footer {
  margin-top: 64px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--accent); }

code, kbd {
  font-family: var(--mono);
  font-size: 13px;
  background: var(--surface);
  padding: 2px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
}