:root{color-scheme:light dark;--bg:#fff;--fg:#1d1d1f;--muted:#6e6e73;--line:#d2d2d7;--acc:#0071e3}
@media(prefers-color-scheme:dark){:root{--bg:#111;--fg:#f5f5f7;--muted:#a1a1a6;--line:#38383a;--acc:#2997ff}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif}
.wrap{max-width:860px;margin:0 auto;padding:0 20px}
header{border-bottom:1px solid var(--line)}.bar{display:flex;flex-wrap:wrap;gap:8px 24px;align-items:center;justify-content:space-between;padding:14px 20px}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:700;font-size:1.2rem;color:var(--fg);text-decoration:none}
nav{display:flex;flex-wrap:wrap;gap:6px 18px}nav a{color:var(--muted);text-decoration:none}nav a:hover,nav a[aria-current]{color:var(--fg)}
main{padding-top:40px;padding-bottom:60px}h1{font-size:2.2rem;line-height:1.2;margin:.2em 0 .4em}h2{margin-top:1.8em;font-size:1.3rem}
a{color:var(--acc)}.muted{color:var(--muted)}.lead{font-size:1.2rem}.tag{color:var(--muted);margin:0}
.hero{padding:30px 0 10px}.appicon{display:block;border-radius:28px}.btn{display:inline-block;background:var(--acc);color:#fff;padding:10px 20px;border-radius:999px;text-decoration:none;margin:4px 8px 4px 0}.btn.alt{background:transparent;color:var(--acc);border:1px solid var(--acc)}
.feats{list-style:none;padding:0;display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));margin-top:40px}.feats li{border:1px solid var(--line);border-radius:14px;padding:4px 20px 12px}.feats h3{margin-bottom:.2em}
details{border-bottom:1px solid var(--line);padding:12px 0}summary{cursor:pointer;font-weight:600}details p{margin:.6em 0 0}
footer{border-top:1px solid var(--line);color:var(--muted);padding:20px 0;font-size:.9rem}footer a{color:var(--muted)}