:root{--bg:#f5f4f0;--card:#fff;--ink:#17171c;--muted:#5f5f6b;--accent:#5b5bd6;--line:#e6e3dc}
@media (prefers-color-scheme:dark){:root{--bg:#0e0e11;--card:#18181d;--ink:#f1f1f4;--muted:#a1a1ad;--accent:#9a9aff;--line:#2a2a31}}
*{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;-webkit-font-smoothing:antialiased}
main{max-width:720px;margin:0 auto;padding:48px 20px 80px}
header{display:flex;align-items:center;gap:14px;margin-bottom:28px}
header img{width:56px;height:56px;border-radius:14px}
header b{font-size:22px;display:block}
header span{color:var(--muted);font-size:15px}
h1{font-size:34px;letter-spacing:-.02em;line-height:1.2;margin:0 0 6px}
h2{font-size:20px;margin:32px 0 8px}
p,li{color:var(--ink)}
.muted{color:var(--muted);font-size:15px}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin:18px 0}
a{color:var(--accent)}
ul{padding-left:22px}
footer{margin-top:48px;color:var(--muted);font-size:14px}

/* Site header, home page */
.brand{display:flex;align-items:center;gap:10px;margin-bottom:28px}
.brand img{width:32px;height:32px;border-radius:8px}
.brand>a{font-weight:700;font-size:19px;color:var(--ink);text-decoration:none}
.brand nav{margin-left:auto;display:flex;gap:18px;font-size:15px}
.brand nav a{text-decoration:none}
.hero{text-align:center;padding:16px 0 16px}
.hero .icon{width:96px;height:96px;border-radius:22px;box-shadow:0 10px 30px rgba(91,91,214,.3)}
.hero h1{font-size:42px;margin:20px 0 10px}
.lead{font-size:19px;color:var(--muted);max-width:560px;margin:0 auto 24px}
.cta{display:inline-block;background:linear-gradient(140deg,#5b5bd6,#8e4ec6);color:#fff;text-decoration:none;font-weight:600;padding:14px 26px;border-radius:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:20px}
.grid .card{margin:0}
.grid h3{margin:6px 0 4px;font-size:18px}
.grid p{margin:0;color:var(--muted);font-size:15px}
.emoji{font-size:28px}
@media (max-width:560px){.hero h1{font-size:32px}}