:root { --bg: #f6f7f9; --card: #fff; --text: #1f2328; --muted: #6a737d; --line: #e3e5e8; --accent: #5865f2; color-scheme: light dark; }
@media (prefers-color-scheme: dark) { :root { --bg: #1e1f22; --card: #2b2d31; --text: #dbdee1; --muted: #949ba4; --line: #3f4147; --accent: #8891f7; } }
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.8 system-ui, -apple-system, "Hiragino Sans", "Yu Gothic UI", sans-serif; }
main { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 28px 24px; }
h1 { font-size: 24px; margin: 0 0 4px; }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 24px; }
h2 { font-size: 17px; margin: 28px 0 6px; padding-top: 16px; border-top: 1px solid var(--line); }
ul, ol { padding-left: 1.4em; } li { margin: 2px 0; }
a { color: var(--accent); }
.back { display: inline-block; margin-bottom: 16px; font-size: 14px; }
.note { background: rgba(88,101,242,.1); border-radius: 10px; padding: 10px 14px; font-size: 14px; }
footer { margin-top: 20px; font-size: 13px; color: var(--muted); text-align: center; }