:root { --bg: #f4f9ff; --card: #ffffff; --ink: #0d2240; --muted: #4a5d78; --accent: #1262ec; --line: #dbe7f7; }
@media (prefers-color-scheme: dark) { :root { --bg: #07142a; --card: #0f2142; --ink: #eaf2ff; --muted: #a8bad6; --accent: #62beff; --line: #1d3561; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; }
main { max-width: 720px; margin: 0 auto; padding: 48px 16px 64px; }
header { display: flex; align-items: center; gap: 14px; margin-bottom: 28px; }
header img { width: 64px; height: 64px; border-radius: 15px; box-shadow: 0 6px 18px rgba(18, 98, 236, .25); }
h1 { font-size: 30px; line-height: 1.2; margin: 0; }
.sub { color: var(--muted); margin: 2px 0 0; font-size: 15px; }
section { background: var(--card); border: 1px solid var(--line); border-radius: 18px; padding: 20px 22px; margin: 16px 0; }
h2 { font-size: 19px; margin: 0 0 8px; }
p, li { color: var(--ink); }
ul { padding-left: 20px; margin: 8px 0; }
a { color: var(--accent); font-weight: 600; }
footer { color: var(--muted); font-size: 14px; text-align: center; margin-top: 32px; }