:root{--bg:#fbfaff;--fg:#17142b;--muted:#5f5b78;--brand:#5b3df5;--brand2:#ff5ca8;--card:#fff;--line:#e7e3f7;--soft:#f1edff;--r:16px}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--fg);background:var(--bg)}
a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.2;letter-spacing:-.01em}h1{font-size:clamp(1.9rem,4.5vw,3rem);margin:.2em 0 .4em}
h2{font-size:clamp(1.3rem,2.6vw,1.7rem);margin:1.6em 0 .6em}h3{font-size:1.08rem;margin:.4em 0}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}.narrow{max-width:820px}
.skip{position:absolute;left:-999px}.skip:focus{left:10px;top:10px;background:#fff;padding:8px;z-index:9}
.top{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.12rem;color:var(--fg);display:inline-flex;align-items:center;gap:8px}.logo b{color:var(--brand)}.logo:hover{text-decoration:none}
.mark{display:inline-grid;place-items:center;width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:.8rem}
.nav{display:flex;gap:4px;flex-wrap:wrap}.nav a{color:var(--fg);padding:7px 11px;border-radius:10px;font-weight:550;font-size:.95rem}
.nav a:hover,.nav a[aria-current]{background:var(--soft);color:var(--brand);text-decoration:none}
.notice{background:var(--soft);color:var(--muted);font-size:.82rem;padding:6px 0;text-align:center}
.hero{padding:56px 0 28px;background:radial-gradient(1200px 400px at 10% -10%,#e9e2ff 0,transparent 60%),radial-gradient(900px 380px at 100% 0,#ffe3f1 0,transparent 60%)}
.hero.small{padding:40px 0 18px}.eyebrow{display:inline-block;font-weight:650;font-size:.85rem;color:var(--brand);background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 12px;margin:0}
.lead{font-size:1.12rem;color:var(--muted);max-width:760px}
.ctas{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:650;padding:12px 20px;border-radius:12px;border:0;cursor:pointer;font-size:1rem}
.btn:hover{filter:brightness(1.08);text-decoration:none}.btn.ghost{background:#fff;color:var(--brand);border:1px solid var(--line)}.btn.sm{padding:8px 14px;font-size:.9rem}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px;margin:20px auto;box-shadow:0 1px 2px rgba(23,20,43,.04)}
.card h2:first-child{margin-top:0}
.grid2{display:grid;grid-template-columns:1.25fr 1fr;gap:20px}.grid2 .card{margin:20px 0}
.facts dl{display:grid;grid-template-columns:auto 1fr;gap:8px 14px;margin:0}.facts dt{font-weight:700}.facts dd{margin:0;color:var(--muted)}
.steps{counter-reset:s;list-style:none;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px}
.steps li{counter-increment:s;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:58px 16px 16px;position:relative}
.steps li:before{content:counter(s);position:absolute;left:16px;top:16px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:700}
.sechead{display:flex;justify-content:space-between;align-items:baseline;gap:12px;flex-wrap:wrap}
.pgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px;display:flex;flex-direction:column;gap:6px;scroll-margin-top:90px}
.pcard:target{outline:3px solid var(--brand2)}
.ptext{color:#2e2a47;font-size:.94rem;margin:0 0 6px;flex:1}
.ptags{display:flex;gap:6px;flex-wrap:wrap}.tag{font-size:.75rem;font-weight:650;background:var(--soft);color:var(--brand);border-radius:999px;padding:2px 10px}.tag.ghost{background:#f4f4f7;color:var(--muted)}
.copy{align-self:flex-start;background:var(--fg);color:#fff;border:0;border-radius:10px;padding:8px 14px;font-weight:650;cursor:pointer;font-size:.88rem}
.copy.done{background:#16a34a}
.tools{display:flex;flex-direction:column;gap:12px;margin-top:10px}
#q{width:100%;max-width:520px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;font-size:1rem;background:#fff}
.chips{display:flex;gap:8px;flex-wrap:wrap}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 12px;cursor:pointer;font-size:.88rem;color:var(--fg)}
.chip.on{background:var(--brand);border-color:var(--brand);color:#fff}
.ggrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:16px}
.gcard{display:grid;grid-template-columns:72px 1fr;gap:14px;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:16px}
.gcard p{margin:.3em 0}.gthumb{width:72px;height:72px;border-radius:14px;display:grid;place-items:center;font-weight:800;font-size:1.8rem;color:#fff;background:linear-gradient(135deg,var(--brand),var(--brand2))}
.formula{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-weight:600}.formula span{background:var(--soft);color:var(--brand);border-radius:10px;padding:4px 10px}
.prose p,.prose li{max-width:780px}.prose h2{scroll-margin-top:80px}
.toc{display:flex;flex-direction:column;gap:4px;max-width:420px}
.tbl{border-collapse:collapse;width:100%;max-width:780px;background:#fff;font-size:.95rem}.tbl th,.tbl td{border:1px solid var(--line);padding:8px 10px;text-align:left}.tbl th{background:var(--soft)}
.faq{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 18px;margin:12px 0}.faq summary{font-weight:700;cursor:pointer}.faq p{margin:.6em 0 0;color:#2e2a47}
.cite{font-size:.75em;vertical-align:super;margin-left:1px}
.submit{display:grid;grid-template-columns:1fr 1fr;gap:12px}.submit label{display:flex;flex-direction:column;font-weight:600;font-size:.9rem;gap:4px}
.submit input,.submit select{padding:10px;border:1px solid var(--line);border-radius:10px;font:inherit;font-weight:400}.submit .wide{grid-column:1/-1}.submit .btn{justify-self:start}
.foot{margin-top:56px;background:#141127;color:#cfcbe6;padding:36px 0 24px}.foot a{color:#fff;display:block;margin:4px 0}.foot .logo{color:#fff;display:inline-flex}
.fcols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}.foot b{color:#fff}
.disclaimer{border-top:1px solid #2c2846;margin-top:22px;padding-top:16px;font-size:.85rem}
.muted{color:var(--muted)}.foot .muted{color:#9c97ba}.small{font-size:.86rem}
@media (max-width:760px){.nav{flex-wrap:nowrap;overflow-x:auto;width:100%;padding-bottom:6px}.bar{padding-top:8px}.grid2,.fcols,.submit{grid-template-columns:1fr}.hero{padding:34px 0 16px}.nav a{padding:6px 8px;font-size:.9rem}.pgrid,.ggrid{grid-template-columns:1fr}.gcard{grid-template-columns:56px 1fr}.gthumb{width:56px;height:56px}}