:root{--ink:#0f1729;--fg:#1d2433;--muted:#5b6475;--bg:#fff;--line:#e3e6ec;--accent:#2563eb;--accent2:#1d4ed8;--soft:#f5f7fb;--dark:#0b1020}
*{box-sizing:border-box}
html{font-size:17px;scroll-behavior:smooth}
body{margin:0;font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--fg);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
.wrap{max-width:68rem;margin:0 auto;padding:0 1.5rem}
.wrap.narrow{max-width:46rem}
/* header */
.top{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.home .top{background:rgba(11,16,32,.9);border-bottom-color:rgba(255,255,255,.08)}
.bar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:.4rem 1.5rem;padding-top:.8rem;padding-bottom:.8rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;color:var(--ink);text-decoration:none;font-size:1.05rem}
.home .top .brand{color:#fff}
.brand img{width:32px;height:32px;border-radius:8px}
nav a{margin-left:1.3rem;color:var(--muted);text-decoration:none;font-size:.94rem;font-weight:500}
.home .top nav a{color:#c3cbe0}
nav a:hover,nav a[aria-current]{color:var(--ink);text-decoration:none}
.home .top nav a:hover{color:#fff}
nav a[aria-current]{border-bottom:2px solid var(--accent);padding-bottom:2px}
/* hero */
.hero{background:radial-gradient(1100px 500px at 80% -10%,#1e3a8a 0,transparent 60%),var(--dark);color:#e8ecf8;padding:4.5rem 0 5rem}
.herogrid{display:grid;grid-template-columns:1.1fr 1fr;gap:3rem;align-items:center}
.eyebrow{color:#8fb0ff;font-weight:600;font-size:.82rem;letter-spacing:.09em;text-transform:uppercase;margin:0 0 .8rem}
.hero h1{font-size:2.8rem;line-height:1.12;color:#fff;margin:0 0 1.1rem;letter-spacing:-.02em}
.sub{font-size:1.15rem;color:#b9c3dc;margin:0 0 1.8rem;max-width:34rem}
.cta{display:flex;gap:.8rem;flex-wrap:wrap}
.btn{display:inline-block;padding:.75rem 1.3rem;border-radius:9px;font-weight:600;text-decoration:none;font-size:.97rem}
.btn.primary{background:var(--accent);color:#fff}
.btn.primary:hover{background:var(--accent2)}
.btn.ghost{border:1px solid rgba(255,255,255,.28);color:#fff}
.btn.ghost:hover{background:rgba(255,255,255,.08)}
.chips{list-style:none;padding:0;margin:1.8rem 0 0;display:flex;gap:.6rem;flex-wrap:wrap}
.chips li{margin:0;font-size:.82rem;color:#c3cbe0;border:1px solid rgba(255,255,255,.16);border-radius:99px;padding:.2rem .75rem}
/* mock */
.mock{background:#fff;border-radius:14px;box-shadow:0 30px 70px rgba(0,0,0,.45);color:var(--fg);overflow:hidden}
.mtabs{display:flex;gap:1.2rem;padding:.7rem 1.1rem 0;border-bottom:1px solid var(--line);font-size:.82rem;color:var(--muted);background:#fafbfd}
.mtabs span{padding-bottom:.55rem}
.mtabs .on{color:var(--accent);font-weight:600;border-bottom:2px solid var(--accent)}
.mbody{padding:1rem 1.1rem .4rem}
.w{border:1px solid var(--line);border-radius:10px;padding:.8rem .9rem;margin-bottom:.8rem;font-size:.86rem}
.w p{margin:.3rem 0;color:var(--muted);line-height:1.5}
.wh{font-size:.88rem}
.wh b{color:var(--accent);margin-right:.3rem}
.pill{display:inline-block;font-size:.68rem;font-weight:700;border-radius:4px;padding:.05rem .4rem;margin-right:.5rem;vertical-align:1px}
.pill.hi{background:#fde8e8;color:#b42318}
.pill.md{background:#fff3d6;color:#8a5a00}
.gwt{background:var(--soft);border-radius:7px;padding:.55rem .7rem;margin-top:.5rem;font-size:.8rem;line-height:1.6}
.gwt i{font-style:normal;font-weight:700;color:var(--ink)}
.vote{display:flex;gap:.5rem;padding-bottom:.7rem}
.vote span{font-size:.78rem;border:1px solid var(--line);border-radius:6px;padding:.15rem .6rem;color:var(--muted)}
.cap{margin:0;padding:.5rem 1.1rem .7rem;font-size:.74rem;color:#8a92a3;text-align:right}
/* sections */
.sec{padding:4rem 0}
.sec.alt{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.st{font-size:1.75rem;line-height:1.25;color:var(--ink);margin:0 0 1.6rem;letter-spacing:-.01em}
.cards3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.cards2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.2rem}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1.4rem 1.4rem 1.2rem}
.card h3{margin:.2rem 0 .4rem;font-size:1.08rem;color:var(--ink)}
.card p{margin:0;color:var(--muted);font-size:.96rem}
.num{display:inline-flex;width:1.9rem;height:1.9rem;border-radius:50%;background:#e8efff;color:var(--accent);font-weight:700;align-items:center;justify-content:center;font-size:.9rem}
.links{display:flex;gap:1.4rem;flex-wrap:wrap;margin-top:1.4rem}
.links a{font-weight:600;text-decoration:none}
.links a:hover{text-decoration:underline}
/* inner pages */
.doc{max-width:46rem;margin:0 auto;padding:3rem 1.5rem 4rem}
.doc h1{font-size:2.2rem;line-height:1.2;color:var(--ink);margin:0 0 .8rem;letter-spacing:-.015em}
.doc h2{font-size:1.3rem;color:var(--ink);margin:2.4rem 0 .5rem;padding-top:1.4rem;border-top:1px solid var(--line)}
.doc h2:first-of-type{border-top:0}
.doc h3{font-size:1.05rem;color:var(--ink);margin:1.5rem 0 .3rem}
.doc p,.doc li{margin:.6rem 0}
.doc ul,.doc ol{padding-left:1.4rem}
.lead{font-size:1.15rem;color:var(--muted)}
.updated{color:var(--muted);font-size:.9rem}
table{border-collapse:collapse;width:100%;font-size:.93rem;margin:1.2rem 0;display:block;overflow-x:auto}
th,td{text-align:left;vertical-align:top;border-bottom:1px solid var(--line);padding:.65rem .8rem .65rem 0}
th{color:var(--ink);font-weight:600;background:var(--soft);padding-left:.6rem}
.note{background:#eef4ff;border-left:3px solid var(--accent);padding:.8rem 1.1rem;margin:1.4rem 0;border-radius:4px}
code{background:var(--soft);border:1px solid var(--line);padding:.05rem .35rem;border-radius:4px;font-size:.9em}
/* footer */
.foot{background:var(--dark);color:#9aa5c0;padding:3rem 0 2rem;font-size:.92rem}
.foot .brand{color:#fff}
.foot a{color:#c3cbe0}
.fcols{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:2rem}
.fcols h4{color:#fff;margin:0 0 .6rem;font-size:.85rem;letter-spacing:.06em;text-transform:uppercase}
.fcols div a:not(.brand){display:block;text-decoration:none;margin:.3rem 0}
.fcols div a:not(.brand):hover{text-decoration:underline}
.fcols p{margin:.7rem 0 0;max-width:20rem}
.fine{border-top:1px solid rgba(255,255,255,.1);margin-top:2rem;padding-top:1.2rem;font-size:.8rem;color:#7d88a6}
@media (max-width:52rem){
.herogrid{grid-template-columns:1fr;gap:2.2rem}
.hero{padding:3rem 0}
.hero h1{font-size:2.15rem}
.cards3,.cards2{grid-template-columns:1fr}
.fcols{grid-template-columns:1fr}
nav a{margin:0 1rem 0 0}
}
@media (max-width:30rem){html{font-size:16px}.doc h1{font-size:1.8rem}}