*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root { --brand: #1a56db; --text: #1f2937; --muted: #6b7280; --line: #e5e7eb; --bg: #f9fafb; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif; color: var(--text); background: var(--bg); line-height: 1.65; font-size: 16px; }
header { background: #111827; color: #fff; padding: 16px 20px; }
header .wrap { display: flex; align-items: center; gap: 10px; }
.logo { width: 32px; height: 32px; border-radius: 7px; background: var(--brand); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 13px; }
header a { color: #fff; text-decoration: none; font-weight: 600; }
nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
nav a { color: #d1d5db; font-weight: 500; }
.wrap { max-width: 820px; margin: 0 auto; }
main { padding: 40px 20px 60px; }
main .card { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 32px; }
h1 { font-size: 28px; line-height: 1.25; margin-bottom: 8px; }
h2 { font-size: 19px; margin: 28px 0 8px; }
p, li { margin-bottom: 10px; }
ul { padding-left: 22px; }
.meta { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.btn { display: inline-block; background: var(--brand); color: #fff; padding: 10px 18px; border-radius: 6px; text-decoration: none; font-weight: 600; margin-top: 8px; }
footer { text-align: center; color: var(--muted); font-size: 13px; padding: 24px 20px 40px; }
footer a { color: var(--muted); }
@media (max-width: 600px) { main .card { padding: 22px; } nav { gap: 10px; } }