:root{--bg:#0F172A;--surface:#1E293B;--on:#F8FAFC;--muted:#94A3B8;--primary:#4F46E5;--line:rgba(71,85,105,.55)}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--on);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.55}
a{color:#A5B4FC}
h1{font-size:1.6rem;margin:.2em 0 .5em}
h2{font-size:1.25rem;margin:.2em 0 .5em}
h3{margin:.2em 0 .6em}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:14px 22px;border-bottom:1px solid var(--line);background:rgba(15,23,42,.92);position:sticky;top:0;z-index:5}
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:800;letter-spacing:.03em;color:var(--on);text-decoration:none}
.brand span{color:var(--muted);font-weight:600}
.nav nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.nav a{text-decoration:none}
.wrap{max-width:880px;margin:0 auto;padding:28px 20px 64px}
.foot{max-width:880px;margin:0 auto;padding:22px 20px;color:var(--muted);font-size:.85rem;border-top:1px solid var(--line)}
.hero{padding:22px 0}
.lead{color:var(--muted);font-size:1.02rem;max-width:640px}
.pill{display:inline-block;background:rgba(79,70,229,.18);border:1px solid rgba(129,140,248,.4);color:#C7D2FE;border-radius:999px;padding:4px 12px;font-size:.74rem;font-weight:700;letter-spacing:.04em}
.card{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:20px;margin:16px 0}
.card.narrow{max-width:480px;margin-left:auto;margin-right:auto}
.grid,.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:14px}
.stats .card{margin:0;text-align:center}
.stats .k,.muted{color:var(--muted);font-size:.85rem}
.card .muted{font-size:.95rem}
.stats strong{display:block;font-size:1.35rem;margin-top:4px}
.btn{display:inline-block;background:var(--primary);color:#fff;border:0;border-radius:11px;padding:11px 18px;font-weight:700;text-decoration:none;cursor:pointer;font-size:.95rem}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--on)}
label{display:block;margin:12px 0;color:var(--muted);font-size:.9rem}
input{display:block;width:100%;margin-top:6px;padding:12px 14px;border-radius:11px;background:#0B1220;border:1px solid var(--line);color:var(--on);font-size:1rem}
input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(79,70,229,.25)}
label.check{display:flex;gap:9px;align-items:center;color:var(--on);margin:14px 0}
label.check input{width:auto;margin:0;accent-color:var(--primary)}
.note{border-radius:12px;padding:12px 15px;margin:12px 0;font-size:.93rem}
.note.ok{background:rgba(16,185,129,.12);border:1px solid rgba(16,185,129,.45);color:#A7F3D0}
.note.err{background:rgba(248,113,113,.1);border:1px solid rgba(248,113,113,.4);color:#FECACA}
.note.warn{background:rgba(245,158,11,.1);border:1px solid rgba(245,158,11,.38);color:#FDE68A}
.linkbox{display:flex;gap:8px;align-items:center}
.linkbox input{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.9rem}
code{background:#0B1220;border:1px solid var(--line);border-radius:7px;padding:2px 6px;font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.86em}
table{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:4px}
th,td{text-align:left;padding:9px 8px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600}
.steps{margin:6px 0 0;padding-left:20px;color:var(--muted)}
ul.steps{list-style:disc}
.steps li{margin:6px 0}
@media(max-width:560px){.linkbox{flex-direction:column;align-items:stretch}}