:root { --ink: #16323a; --muted: #5b6f75; --accent: #007c89; --line: #dde6e8; --bg: #f6f9f9; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 48px; background: #fff; min-height: 100vh; }
@media (min-width: 800px) { main { margin: 32px auto; min-height: 0; border: 1px solid var(--line); border-radius: 16px; padding: 40px 48px; } }
.brand { margin: 0; color: var(--accent); font-weight: 700; letter-spacing: .02em; }
h1 { margin: 4px 0 4px; font-size: 32px; line-height: 1.2; }
.meta { margin: 0 0 24px; color: var(--muted); font-size: 14px; }
h2 { margin: 32px 0 8px; font-size: 20px; }
h3 { margin: 20px 0 4px; font-size: 17px; }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--accent); }
footer { margin-top: 40px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }