:root {
  color-scheme: light dark;
  --paper: #faf9f6;
  --ink: #1c1e22;
  --ink-muted: #5b5f6a;
  --line: #e2e0d8;
  --accent: #6a3fd6;
  --chip-bg: #efecf9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #16171a;
    --ink: #eceae4;
    --ink-muted: #a3a6ad;
    --line: #2c2e33;
    --accent: #b39dff;
    --chip-bg: #262238;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.65;
}
.wrap {
  max-width: 720px;
  margin-inline: auto;
  padding: 48px 20px 80px;
}
header.top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
}
header.top .logo {
  font-weight: 800;
  font-size: 20px;
  letter-spacing: -0.02em;
}
h1 {
  font-size: 28px;
  font-weight: 800;
  margin: 24px 0 4px;
}
.updated {
  font-size: 13px;
  color: var(--ink-muted);
  margin-bottom: 20px;
}
.intro {
  color: var(--ink-muted);
  margin-bottom: 28px;
}
h2 {
  font-size: 17px;
  font-weight: 700;
  margin: 32px 0 10px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
h2:first-of-type { border-top: none; padding-top: 0; }
p { margin: 0 0 14px; max-width: 68ch; }
ul { margin: 0 0 14px; padding-left: 20px; max-width: 66ch; }
li { margin-bottom: 8px; }
a { color: var(--accent); }
nav.switch {
  display: flex;
  gap: 16px;
  font-size: 13px;
  margin-bottom: 16px;
}
nav.switch a { text-decoration: none; }
nav.switch a.current { color: var(--ink); font-weight: 700; text-decoration: underline; }

/* Language picker (client-side, progressive enhancement) */
.langpicker {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 24px;
}
.langpicker button {
  font: inherit;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 100px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink-muted);
  cursor: pointer;
}
.langpicker button.active {
  background: var(--chip-bg);
  color: var(--accent);
  border-color: var(--accent);
}
.langpicker button:hover { border-color: var(--accent); }

footer.contact {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-muted);
}