:root{--ground:#F5F5F5;--card:#EBEBEB;--ink:#111;--ink2:#444;--mute:#666;--line:#DCDCDC}
@media (prefers-color-scheme:dark){:root{--ground:#0E0E0E;--card:#1C1C1C;--ink:#F2F2F2;--ink2:#B8B8B8;--mute:#8E8E8E;--line:#2E2E2E}}
*{box-sizing:border-box}body{margin:0;background:var(--ground);color:var(--ink);font:17px/1.55 -apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif}
main{max-width:640px;margin:0 auto;padding:48px 24px 64px}
header a{color:var(--ink);text-decoration:none;font-weight:600;font-size:20px;letter-spacing:-.3px}
h1{font-size:40px;line-height:1.1;letter-spacing:-1px;margin:40px 0 16px}h2{font-size:21px;margin:36px 0 8px}
p,li{color:var(--ink2)}a{color:var(--ink)}ul{padding-left:20px}
.card{background:var(--card);border-radius:18px;padding:20px 22px;margin:24px 0}
footer{border-top:1px solid var(--line);margin-top:56px;padding-top:20px;font-size:15px;color:var(--mute)}footer a{color:var(--mute);margin-right:16px}
small{color:var(--mute)}