:root {
  --bg: #ffffff; --fg: #15191e; --muted: #5b6470; --rule: #e3e6ea; --accent: #1f8a57; --card: #f5f7f8;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0d1013; --fg: #eef1f3; --muted: #9aa4ae; --rule: #232a31; --accent: #4fcb8a; --card: #15191e; color-scheme: dark; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 24px; }
h1 { font-size: 2.2rem; line-height: 1.15; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 1.15rem; margin: 2em 0 0.4em; }
p, li { color: var(--fg); }
.lede { font-size: 1.2rem; color: var(--muted); margin: 0 0 28px; }
.muted { color: var(--muted); font-size: 0.95rem; }
a { color: var(--accent); }
.card { background: var(--card); border-radius: 14px; padding: 16px 20px; margin: 20px 0; }
nav { display: flex; gap: 20px; margin-bottom: 40px; font-weight: 600; }
nav a { color: var(--fg); text-decoration: none; }
.brand { letter-spacing: 0.04em; }
footer { max-width: 680px; margin: 0 auto; padding: 24px 16px 48px; border-top: 1px solid var(--rule); color: var(--muted); font-size: 0.85rem; line-height: 1.5; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px 8px 0; border-bottom: 1px solid var(--rule); }
code { overflow-wrap: anywhere; }