:root { --bg: #0d1117; --fg: #e8edf2; --muted: #9aa7b4; --accent: #38e8c6; --card: #161d26; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 17px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
main { max-width: 680px; margin: 0 auto; padding: 48px 16px 80px; }
h1 { font-size: 2.1rem; line-height: 1.2; margin: 0 0 16px; }
h2 { font-size: 1.25rem; margin: 36px 0 8px; }
p, li { color: var(--fg); }
.muted { color: var(--muted); }
a { color: var(--accent); }
.mark { color: var(--accent); font-weight: 700; letter-spacing: .02em; }
.card { background: var(--card); border-radius: 14px; padding: 16px 20px; margin: 20px 0; overflow-wrap: anywhere; }
button { background: var(--accent); color: #06231d; border: 0; border-radius: 10px; padding: 12px 20px; font: inherit; font-weight: 600; cursor: pointer; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; vertical-align: top; padding: 8px 8px 8px 0; border-bottom: 1px solid #27313d; }
footer { margin-top: 48px; color: var(--muted); font-size: .9rem; }