:root {
  --brand: #2f6fd6;
  --bg: #ffffff;
  --text: #1c2330;
  --muted: #5b6475;
  --rule: #e3e7ee;
  --draft-bg: #fff4d6;
  --draft-text: #6b4e00;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161d;
    --text: #e6e9ef;
    --muted: #9aa3b2;
    --rule: #2a313d;
    --draft-bg: #3a2f10;
    --draft-text: #f2d48a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--brand); }
@media (prefers-color-scheme: dark) { a { color: #7aa7f0; } }

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding: 14px 16px;
  background: var(--brand);
}
.site-header .brand img { display: block; height: 32px; width: auto; }
.site-header nav { display: flex; gap: 18px; }
.site-header nav a { color: #fff; text-decoration: none; font-weight: 500; }
.site-header nav a:hover { text-decoration: underline; }

.draft {
  margin: 0;
  padding: 10px 16px;
  background: var(--draft-bg);
  color: var(--draft-text);
  text-align: center;
  font-weight: 600;
}

main { max-width: 720px; margin: 0 auto; padding: 32px 16px 48px; }

.hero h1 { font-size: clamp(28px, 6vw, 40px); line-height: 1.2; margin: 24px 0 16px; }
.hero p { font-size: 19px; color: var(--muted); }
.hero .soon { color: var(--text); font-weight: 600; }

.doc h1 { font-size: 30px; line-height: 1.25; margin-top: 8px; }
.doc h2 { font-size: 22px; margin-top: 36px; }
.doc h3 { font-size: 18px; margin-top: 24px; }
.doc hr { border: 0; border-top: 1px solid var(--rule); margin: 32px 0; }
.doc li { margin: 6px 0; }
.doc blockquote { margin: 0; padding: 8px 16px; border-left: 4px solid var(--rule); color: var(--muted); }

footer {
  border-top: 1px solid var(--rule);
  padding: 20px 16px 32px;
  text-align: center;
  color: var(--muted);
  font-size: 15px;
}