:root{--bg:#0b1020;--bg2:#11182f;--card:#161f3d;--ink:#e8ecf8;--muted:#9aa7c7;--accent:#5ea9ff;--line:rgba(255,255,255,.1)}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(120% 80% at 50% -10%,rgba(94,169,255,.12),transparent 55%),var(--bg);color:var(--ink);font:16px/1.65 system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{position:sticky;top:0;z-index:10;display:flex;flex-wrap:wrap;gap:.5rem 1rem;align-items:center;justify-content:space-between;padding:.7rem 1.2rem;background:rgba(11,16,32,.8);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{font-weight:700;color:#fff}
.brand-mark{font-size:1.1em}
.brand-beta{font-size:.6em;vertical-align:middle;border:1px solid rgba(251,191,36,.4);background:rgba(251,191,36,.1);color:#fcd34d;padding:.1em .4em;border-radius:.4em;text-transform:uppercase;letter-spacing:.05em}
.site-header nav{display:flex;flex-wrap:wrap;gap:.2rem .9rem}
.site-header nav a{color:var(--muted);font-size:.95rem}
.site-header nav a[aria-current=page]{color:#fff}
.page{max-width:760px;margin:0 auto;padding:1.5rem 1.2rem 2rem}
.breadcrumbs{font-size:.85rem;color:var(--muted);margin:.3rem 0 1rem}
.breadcrumbs .sep{margin:0 .4rem;opacity:.5}
h1{font-size:clamp(1.6rem,4vw,2.3rem);line-height:1.15;margin:.2rem 0 .6rem}
h2{font-size:1.25rem;margin:2rem 0 .5rem;color:#fff}
h3{color:#fff}
.lede{font-size:1.1rem;color:#cdd6ef}
.cta{margin:1.2rem 0}
.btn{display:inline-block;padding:.7rem 1.1rem;border-radius:.6rem;border:1px solid var(--line);background:var(--card);color:#fff;font-weight:600}
.btn:hover{text-decoration:none;border-color:var(--accent)}
.btn-primary{background:rgba(94,169,255,.18);border-color:rgba(94,169,255,.5);color:#cfe4ff}
table{width:100%;border-collapse:collapse;margin:.5rem 0;font-size:.95rem}
th,td{text-align:left;padding:.5rem .6rem;border-bottom:1px solid var(--line);vertical-align:top}
table.facts th{width:46%;color:var(--muted);font-weight:600}
.note{color:var(--muted);font-size:.9rem}
ul,ol{padding-left:1.2rem}
li{margin:.25rem 0}
details{border:1px solid var(--line);border-radius:.6rem;padding:.2rem .9rem;margin:.5rem 0;background:var(--bg2)}
summary{cursor:pointer;font-weight:600;padding:.6rem 0}
.answer{color:#cdd6ef}
.qa{border-bottom:1px solid var(--line);padding-bottom:.4rem}
.qa h2{font-size:1.1rem}
.related ul{list-style:none;padding:0;display:flex;flex-wrap:wrap;gap:.5rem}
.related li a{display:inline-block;padding:.4rem .7rem;border:1px solid var(--line);border-radius:.5rem;background:var(--card);font-size:.9rem}
.back{margin-top:2rem}
.site-footer{border-top:1px solid var(--line);margin-top:2rem;padding:1.5rem 1.2rem;background:rgba(0,0,0,.2)}
.foot-grid{max-width:900px;margin:0 auto;display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:1.2rem}
.foot-group h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin:0 0 .5rem}
.foot-group ul{list-style:none;padding:0;margin:0}
.foot-group a{color:#cdd6ef;font-size:.9rem}
.foot-note{max-width:900px;margin:1.2rem auto 0;color:var(--muted);font-size:.8rem}