:root{--fg:#16191d;--bg:#fff;--panel:#f6f8fa;--accent:#0a6ed1;--accent-d:#08509a;--muted:#5b6570;--line:#e2e6ea}
@media(prefers-color-scheme:dark){:root{--fg:#e8eaed;--bg:#0f1216;--panel:#171b21;--accent:#4d9fe8;--accent-d:#6fb4ef;--muted:#9aa4b0;--line:#252b33}}
*{box-sizing:border-box}
body{margin:0;font:16px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,sans-serif;color:var(--fg);background:var(--bg);-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
header{border-bottom:1px solid var(--line);background:var(--bg);position:sticky;top:0;z-index:10}
nav{max-width:60rem;margin:0 auto;padding:.9rem 1.25rem;display:flex;gap:1.5rem;align-items:center;flex-wrap:wrap}
.brand{font-weight:700;font-size:1.2rem;text-decoration:none;color:var(--fg);letter-spacing:-.01em}
nav ul{list-style:none;display:flex;gap:1.4rem;margin:0;padding:0;flex:1}
nav ul a{color:var(--muted);text-decoration:none;font-size:.95rem}
nav ul a:hover{color:var(--accent)}
.nav-cta{font-weight:600;text-decoration:none;white-space:nowrap}
main{max-width:60rem;margin:0 auto;padding:0 1.25rem}
.hero{padding:4rem 0 3rem;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(2rem,5vw,3rem);margin:0 0 .75rem;letter-spacing:-.02em;line-height:1.15}
.lead{font-size:1.2rem;color:var(--muted);margin:0 0 1.75rem;max-width:42rem}
.cta-row{display:flex;gap:.75rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.8rem 1.5rem;background:var(--accent);color:#fff;text-decoration:none;border-radius:6px;font-weight:600}
.btn:hover{background:var(--accent-d)}
.btn-alt{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn-alt:hover{background:var(--panel)}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(15rem,1fr));gap:1.25rem;margin:2.5rem 0}
.card{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:1.4rem}
.card h3{margin:0 0 .5rem;font-size:1.05rem}
.card p{margin:0;color:var(--muted);font-size:.95rem}
article,main>h1{padding:2.5rem 0 1rem}
main h1{font-size:2.1rem;margin:0 0 1rem;letter-spacing:-.02em}
main h2{margin:2.2rem 0 .6rem;font-size:1.35rem;letter-spacing:-.01em}
main h3{margin:1.6rem 0 .4rem;font-size:1.05rem}
main ul{padding-left:1.25rem}
main li{margin:.35rem 0}
.closing{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:2rem;margin:3rem 0;text-align:center}
.closing h2{margin:0 0 .5rem}
.closing p{color:var(--muted);margin:0 0 1.25rem}
footer{border-top:1px solid var(--line);margin-top:3rem;background:var(--panel)}
.foot{max-width:60rem;margin:0 auto;padding:2rem 1.25rem 1rem;display:flex;justify-content:space-between;gap:2rem;flex-wrap:wrap}
.foot a{color:var(--accent);text-decoration:none}
.muted{color:var(--muted);font-size:.9rem}
.copy{max-width:60rem;margin:0 auto;padding:0 1.25rem 2rem;color:var(--muted);font-size:.85rem}
@media(max-width:34rem){nav{gap:.9rem}nav ul{order:3;flex-basis:100%;gap:1.1rem}}