:root{--bg:#0b0e13;--text:#101317;--muted:#5a6472;--brand:#0b6cff;--brand2:#ff3b30;--surface:#ffffff;--surface-2:#f4f6f8;--shadow:0 6px 24px rgba(16,19,23,.12)}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--text);background:linear-gradient(180deg,#f7f9fc 0%,#eef2f7 100%)}
.wrap{max-width:1100px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-999px;top:-999px;background:#000;color:#fff;padding:10px;border-radius:6px}
.skip-link:focus{left:12px;top:12px;z-index:1000}
.site-header{background:#0f1218;color:#fff;position:sticky;top:0;z-index:100}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.5px}
.menu-toggle{background:transparent;border:1px solid rgba(255,255,255,.18);color:#fff;border-radius:8px;padding:8px 12px}
.menu-toggle:focus{outline:3px solid #fff;outline-offset:2px}
.nav ul{list-style:none;margin:0;padding:0;display:flex;gap:20px}
.nav a{color:#cfe0ff;text-decoration:none}
.nav a:hover,.nav a[aria-current="page"]{color:#fff}
.hero{background:radial-gradient(1000px 600px at 10% 10%,#d8e6ff 0%,#f7f9fc 50%,#eef2f7 100%);padding:72px 0}
.hero h1{font-size:40px;margin:0 0 12px}
.hero p{max-width:720px;color:var(--muted)}
.btn{display:inline-block;background:var(--brand);color:#fff;text-decoration:none;padding:12px 16px;border-radius:10px;margin-right:10px;box-shadow:var(--shadow)}
.btn.ghost{background:#fff;color:#0b0e13;border:1px solid #d0d7e2}
.section{padding:40px 0}
.section.alt{background:var(--surface-2)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--surface);border-radius:14px;box-shadow:var(--shadow);overflow:hidden}
.card-link{display:block;color:inherit;text-decoration:none}
.card img{width:100%;height:160px;object-fit:cover;background:#dbe7ff}
.card-body{padding:16px}
.card-body h3{margin:0 0 8px;font-size:20px}
.card-body p{color:var(--muted);margin:0 0 12px}
.meta{font-size:12px;color:#667085}
.site-footer{background:#0f1218;color:#cfe0ff}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:20px;padding:28px 0}
.footer-grid .brand{color:#fff}
.copy{color:#97a6ba}
.list{padding-left:18px}
.list li{margin:6px 0}
main:focus{outline:3px solid var(--brand);outline-offset:4px}
@media (max-width:900px){.cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:600px){
  .nav{display:none}
  .nav.open{display:block;position:absolute;left:0;right:0;top:64px;background:#0f1218;border-top:1px solid rgba(255,255,255,.1)}
  .nav ul{flex-direction:column;padding:10px}
  .cards{grid-template-columns:1fr}
  .hero h1{font-size:30px}
}
article.content{max-width:760px;margin:0 auto}
article.content h1{font-size:34px;margin:0 0 16px}
article.content h2{margin:24px 0 10px}
article.content h3{margin:16px 0 8px}
article.content img{width:100%;height:auto;border-radius:10px}
.article-meta{display:flex;gap:14px;color:#667085;font-size:14px;margin-bottom:16px;flex-wrap:wrap}
.read-time{background:#eef2f7;border-radius:8px;padding:4px 8px}
.related{background:var(--surface-2);border-radius:12px;padding:12px;margin-top:24px}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border:1px solid #e5e7eb;padding:8px;text-align:left}
.faq{margin-top:20px}
.faq details{background:#fff;border:1px solid #e5e7eb;border-radius:10px;padding:10px;margin:8px 0}
.faq summary{cursor:pointer}
:focus{outline:3px solid var(--brand);outline-offset:2px}