:root { --ink: #1b1f2a; --muted: #6b7385; --blue: #2f7df6; --bg: #f5f7fb; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 "Segoe UI", system-ui, -apple-system, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 24px 16px 48px; background: #fff; min-height: 100vh; box-sizing: border-box; }
h1 { font-size: 26px; line-height: 1.25; }
h2 { font-size: 19px; margin-top: 28px; }
h3 { font-size: 16px; margin-bottom: 4px; }
a { color: var(--blue); }
.muted { color: var(--muted); font-size: 14px; }
.big { font-size: 20px; font-weight: 700; }
ul { padding-left: 20px; }