:root{--bg:#0a1730;--bg2:#0f2247;--panel:#13294f;--panel2:#183462;--line:rgba(255,255,255,.08);--red:#e03131;--red2:#ff4d4d;--ink:#f5f7fa;--muted:#a6b3c7;--gold:#ffc43d;--green:#3ddc97;--radius:16px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(1200px 600px at 80% -10%,#1b3a6b 0%,var(--bg) 55%);color:var(--ink);font:16px/1.6 Inter,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding:0 16px}
.wrap{max-width:820px;margin:0 auto;padding:0 0 60px}
a{color:#ff9d9d}
/* sticky offer bar */
.bar{position:sticky;top:0;z-index:50;margin:0 -16px 0;padding:10px 16px;background:linear-gradient(90deg,#b91c1c,#e03131);color:#fff;display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;font-size:14px;font-weight:600;box-shadow:0 6px 24px rgba(0,0,0,.35)}
.bar .code{font-family:ui-monospace,Menlo,Consolas,monospace;background:rgba(0,0,0,.25);padding:3px 10px;border-radius:8px;letter-spacing:2px;font-size:14px;border:0;display:inline-block;margin:0}
.bar a.go{color:#fff;background:#0a1730;text-decoration:none;padding:7px 14px;border-radius:999px;font-weight:700;white-space:nowrap}
.bar a.go:hover{background:#000}
nav.top{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:16px 0;border-bottom:1px solid var(--line);margin-bottom:22px}
nav.top a{color:var(--ink);text-decoration:none;font-weight:600;font-size:15px;opacity:.9}
nav.top a:hover{opacity:1;color:#fff}
nav.top a.brand{display:flex;align-items:center;gap:8px;margin-right:auto;font-size:18px;opacity:1}
nav.top svg{width:30px;height:30px}
h1{font-size:34px;line-height:1.15;margin:0 0 10px;letter-spacing:-.3px}
h2{font-size:22px;margin:34px 0 10px;letter-spacing:-.2px}
h2::after{content:"";display:block;width:44px;height:3px;background:var(--red);border-radius:2px;margin-top:6px}
h3{font-size:17px;margin:18px 0 6px}
p{margin:10px 0}
.meta{color:var(--muted);font-size:14px;margin-bottom:18px}
.tldr{background:linear-gradient(180deg,var(--panel2),var(--panel));border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:14px 16px;margin:18px 0}
.tldr strong{color:var(--gold)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px;margin:14px 0}
.notice{background:rgba(224,49,49,.14);border:1px solid rgba(224,49,49,.5);color:#ffd6d6;border-radius:12px;padding:10px 14px;font-weight:600;margin:0 0 20px;font-size:14px}
.notice a{color:#fff}
.code{font-size:26px;font-weight:800;letter-spacing:3px;background:var(--bg);border:1px dashed var(--muted);border-radius:10px;padding:10px 16px;display:inline-block;margin:6px 0}
.btn{display:inline-block;background:linear-gradient(90deg,#c92a2a,var(--red2));color:#fff;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:12px;margin:6px 6px 0 0;border:0;cursor:pointer;font-size:16px;box-shadow:0 8px 24px rgba(224,49,49,.3)}
.btn:hover{filter:brightness(1.08)}
.btn.alt{background:var(--panel2);box-shadow:none;border:1px solid var(--line)}
.hero{padding:26px 0 8px}
.hero .lead{font-size:18px;color:var(--muted);max-width:640px}
.pill{display:inline-block;font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase;color:var(--gold);background:rgba(255,196,61,.12);border:1px solid rgba(255,196,61,.35);padding:4px 10px;border-radius:999px;margin-bottom:12px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.grid3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
@media (max-width:640px){.grid,.grid3{grid-template-columns:1fr}}
.tile{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;text-decoration:none;color:var(--ink);display:block;transition:transform .12s,border-color .12s}
.tile:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.22)}
.tile strong{display:block;font-size:16px;margin-bottom:4px}
.tile span{color:var(--muted);font-size:14px}
.stat{font-size:28px;font-weight:800;color:var(--gold)}
table{border-collapse:collapse;width:100%;margin:12px 0;font-size:15px}
th,td{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600}
.tablewrap{overflow-x:auto}
ol,ul{padding-left:22px}
li{margin:6px 0}
.small{color:var(--muted);font-size:14px}
footer{margin-top:44px;color:var(--muted);font-size:14px;border-top:1px solid var(--line);padding-top:18px}
.faq h3{margin-top:16px}
label{display:block;font-size:14px;color:var(--muted);margin:10px 0 4px}
input,select{width:100%;padding:11px;border-radius:10px;border:1px solid var(--line);background:var(--bg);color:var(--ink);font-size:16px}
.result{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-top:14px}
.result .big{font-size:26px;font-weight:800;color:var(--gold)}
canvas{width:100%;max-width:100%;background:var(--bg);border-radius:10px;border:1px solid var(--line)}
.cta{background:linear-gradient(135deg,#1a3566,#13294f);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:28px 0}
.related a{display:block;margin:6px 0}
details summary{cursor:pointer;color:var(--muted);font-weight:600}

@media (max-width:640px){.bar{font-size:13px;gap:8px}.bar span:not(.code){display:none}.bar a.go{padding:6px 12px}}