:root { --ground: #f4f3ef; --card: #ffffff; --ink: #1c1b19; --ink-soft: #6b6862; --hairline: #e4e2dc; --accent: #1a5ce6; }
* { box-sizing: border-box; }
body { margin: 0; background: var(--ground); color: var(--ink); font: 17px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; -webkit-font-smoothing: antialiased; }
main { max-width: 640px; margin: 0 auto; padding: 40px 20px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 36px; }
header img { width: 48px; height: 48px; border-radius: 12px; border: 1px solid var(--hairline); }
header a { color: var(--ink); text-decoration: none; font-size: 22px; font-weight: 700; letter-spacing: -0.4px; }
h1 { font-size: 30px; letter-spacing: -0.5px; margin: 0 0 8px; }
h2 { font-size: 19px; margin: 28px 0 8px; }
p, li { color: var(--ink); margin: 0 0 12px; }
.soft { color: var(--ink-soft); }
.card { background: var(--card); border: 1px solid var(--hairline); border-radius: 22px; padding: 22px 24px; margin: 20px 0; }
a { color: var(--accent); }
nav { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 36px; padding-top: 18px; border-top: 1px solid var(--hairline); font-size: 15px; }
nav a { color: var(--ink-soft); text-decoration: none; }
nav a:hover { color: var(--accent); }