*{box-sizing:border-box}body{margin:0;font-family:"IBM Plex Sans",system-ui,sans-serif;color:#0f172a;background:#f8fafc;line-height:1.65}
header,footer{background:#0f172a;color:#e2e8f0}header .in,footer .in{max-width:860px;margin:0 auto;padding:16px 20px;display:flex;gap:16px;align-items:center;justify-content:space-between;flex-wrap:wrap}
header a{color:#fff;text-decoration:none;font-weight:800}header .cta{background:#4f46e5;padding:8px 16px;border-radius:999px;font-weight:600}
main{max-width:860px;margin:0 auto;padding:40px 20px 64px}h1{font-size:clamp(28px,5vw,40px);line-height:1.15;margin:0 0 16px}
h2{font-size:22px;margin:36px 0 8px}.lead{font-size:18px;color:#334155}nav.crumbs{font-size:14px;margin-bottom:20px}nav.crumbs a{color:#4f46e5}
.box{background:#eef2ff;border:1px solid #c7d2fe;border-radius:16px;padding:24px;margin:40px 0}.box a.btn{display:inline-block;background:#4f46e5;color:#fff;text-decoration:none;padding:12px 22px;border-radius:999px;font-weight:600;margin-top:8px}
details{background:#fff;border:1px solid #e2e8f0;border-radius:12px;padding:14px 18px;margin:10px 0}summary{font-weight:600;cursor:pointer}
footer a{color:#c7d2fe}footer .in{font-size:14px}ul.related{padding-left:20px}
@media (prefers-color-scheme:dark){body{background:#0b1120;color:#e2e8f0}.lead{color:#cbd5e1}.box{background:#1e1b4b;border-color:#3730a3}details{background:#111827;border-color:#1f2937}nav.crumbs a,a{color:#a5b4fc}}