:root{--bg:#fbfbfc;--fg:#1c1d21;--mut:#63666e;--line:#e6e7ea;--acc:#2f6df6}
*{box-sizing:border-box}
body{margin:0;font:16px/1.6 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;color:var(--fg);background:var(--bg)}
.wrap{max-width:62rem;margin:0 auto;padding:0 1.25rem}
header{border-bottom:1px solid var(--line);background:#fff}
header .wrap{display:flex;align-items:center;justify-content:space-between;height:4rem}
.brand{font-weight:650;text-decoration:none;color:var(--fg);display:flex;align-items:center;gap:.5rem}
.dot{width:.6rem;height:.6rem;border-radius:50%;background:var(--acc);display:inline-block}
nav a{margin-left:1.4rem;color:var(--mut);text-decoration:none;font-size:.94rem}
nav a:hover{color:var(--fg)}
main{padding:3.5rem 0 4rem}
h1{font-size:2rem;line-height:1.25;margin:0 0 .75rem;letter-spacing:-.02em}
.lead{color:var(--mut);font-size:1.06rem;max-width:44rem;margin:0 0 2.5rem}
.grid{display:grid;gap:1.25rem;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr))}
.grid section{background:#fff;border:1px solid var(--line);border-radius:.7rem;padding:1.25rem}
.grid h2{font-size:1rem;margin:0 0 .4rem}
.grid p{margin:0;color:var(--mut);font-size:.93rem}
.note{margin-top:2rem;padding:1rem 1.25rem;border-left:3px solid var(--acc);background:#fff;border-radius:.4rem;font-size:.93rem;color:var(--mut)}
footer{border-top:1px solid var(--line);background:#fff;margin-top:3rem}
footer .wrap{display:flex;justify-content:space-between;height:3.5rem;align-items:center;color:var(--mut);font-size:.87rem}
@media (prefers-color-scheme:dark){
 :root{--bg:#0f1114;--fg:#e8e9ec;--mut:#9aa0aa;--line:#22262c}
 header,footer,.grid section,.note{background:#151920}
}