:root { --ink: #1f2d3a; --chalk: #f4f1ea; --muted: #5b6b78; --accent: #e25a3c; --line: #d9d4ca; }
* { box-sizing: border-box; }
body { margin: 0; font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif; color: var(--ink); background: var(--chalk); }
main { max-width: 680px; margin: 0 auto; padding: 48px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 36px; }
header img { width: 44px; height: 44px; border-radius: 10px; }
header a { color: inherit; text-decoration: none; font-weight: 600; }
header nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }
header nav a { color: var(--muted); }
h1 { font-size: 34px; line-height: 1.15; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 36px 0 8px; }
p, li { margin: 0 0 12px; }
.lede { font-size: 20px; color: var(--muted); }
ul { padding-left: 22px; }
a { color: var(--accent); }
footer { border-top: 1px solid var(--line); margin-top: 48px; padding-top: 18px; font-size: 14px; color: var(--muted); }
.note { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; }
@media (max-width: 480px) { h1 { font-size: 28px; } header nav { display: none; } }