:root{--ink:#14213d;--muted:#5b6475;--bg:#fbfaf7;--card:#fff;--line:#e4e1d8;--brand:#0f766e;--brand-d:#0b5a54;--warn:#b45309;--err:#b91c1c;--ok:#15803d;--soft:#ecfdf5}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.55 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;color:var(--ink);background:var(--bg)}
a{color:var(--brand-d)}a:hover{color:var(--ink)}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
header.top{border-bottom:1px solid var(--line);background:#fff}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.logo{font-weight:800;letter-spacing:-.02em;color:var(--ink);text-decoration:none;font-size:18px}.logo span{color:var(--brand)}
nav a{margin-left:18px;text-decoration:none;color:var(--muted);font-weight:500}nav a.cta{color:#fff;background:var(--brand);padding:8px 14px;border-radius:8px}
.banner{background:#fff7ed;border-bottom:1px solid #fed7aa;color:#7c2d12;font-size:14px;padding:8px 0;text-align:center}
.hero{padding:64px 0 40px}.hero h1{font-size:44px;line-height:1.1;letter-spacing:-.03em;margin:0 0 16px;max-width:820px}
.hero p.lead{font-size:20px;color:var(--muted);max-width:720px;margin:0 0 28px}
.btn{display:inline-block;border:0;cursor:pointer;font:inherit;font-weight:600;padding:12px 20px;border-radius:10px;text-decoration:none;background:var(--brand);color:#fff}
.btn:hover{background:var(--brand-d);color:#fff}.btn.ghost{background:transparent;color:var(--brand-d);border:1.5px solid var(--brand)}.btn.ghost:hover{background:var(--soft)}
.btn.small{padding:7px 12px;font-size:14px}.btn[disabled]{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:14px;flex-wrap:wrap;align-items:center}
.countdown{display:flex;gap:10px;margin:28px 0 8px}.countdown div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 16px;min-width:88px;text-align:center}
.countdown b{display:block;font-size:30px;font-variant-numeric:tabular-nums}.countdown small{color:var(--muted)}
section{padding:44px 0;border-top:1px solid var(--line)}section h2{font-size:28px;letter-spacing:-.02em;margin:0 0 18px}
.grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted)}
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin:10px 0}summary{font-weight:600;cursor:pointer}
.disclaimer{font-size:14px;color:var(--muted);background:#f3f1ea;border-radius:12px;padding:16px}
footer{padding:30px 0 60px;color:var(--muted);font-size:14px;border-top:1px solid var(--line)}
.hint{font-size:13px;color:var(--muted);font-weight:400}
.q{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin:14px 0}.q h3{margin:0 0 10px;font-size:18px}.q .opts{display:flex;gap:10px;flex-wrap:wrap}.q .opts button{font:inherit;padding:10px 16px;border:1.5px solid var(--line);border-radius:10px;background:#fff;cursor:pointer}.q .opts button.on{border-color:var(--brand);background:var(--soft)}
.answer{border-radius:14px;padding:22px;margin:20px 0}.answer.must{background:#fef3c7;border:1px solid #fcd34d}.answer.no{background:#dcfce7;border:1px solid #86efac}.answer.maybe{background:#e0f2fe;border:1px solid #7dd3fc}
.answer h2{margin:0 0 8px}
.kbd{font-family:ui-monospace,Menlo,monospace;font-size:13px;background:#f1efe8;padding:1px 5px;border-radius:5px}
@media(max-width:640px){.hero h1{font-size:32px}nav a:not(.cta){display:none}}
.narrow{max-width:780px;padding-top:30px;padding-bottom:40px}.narrow h1{letter-spacing:-.02em}
.intro{font-size:16px}.mt{margin-top:14px}
.btn.big{font-size:20px;padding:16px 28px}
.help{background:var(--soft);border:1px solid #a7f3d0;border-radius:14px;padding:20px;margin:24px 0}.help h2,.help h3{margin:0 0 6px}
.disclaimer.global{margin:0 0 14px}
footer a{margin-right:10px}
.cont{margin:12px 0 0}
.help p:last-child{margin-bottom:0}