:root{--bg:#eef0fa;--panel:#ffffff;--ink:#12142e;--muted:#585d7e;--line:#d3d7ec;--hdr:#1c1050;--on-hdr:#f2f3ff;--accent:#4b36e0;--on-accent:#fff;--accent-soft:#e6e3ff;--hot:#e0245e;--good:#0c8f55;--bad:#d11f4f;--wash:#f6f7fd;--mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;--head:"Avenir Next","Trebuchet MS","Segoe UI",system-ui,sans-serif}
@media (prefers-color-scheme:dark){:root{--bg:#0b0c1d;--panel:#14162e;--ink:#eceeff;--muted:#a2a8d0;--line:#2b2f57;--hdr:#0d0626;--on-hdr:#eceeff;--accent:#9a8bff;--on-accent:#0b0c1d;--accent-soft:#25244d;--hot:#ff5c8a;--good:#4fe0a0;--bad:#ff7a9c;--wash:#101228}}
*{box-sizing:border-box}[hidden]{display:none!important}
html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.65 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
h1,h2,h3,.brand{font-family:var(--head)}
a{color:var(--accent);text-underline-offset:3px}a:hover{text-decoration-thickness:2px}.skip{position:absolute;left:-999px}.skip:focus{left:8px;top:8px;background:var(--panel);padding:8px 12px;z-index:9}
.w{max-width:46rem;margin:0 auto;padding:0 20px}.w.wide{max-width:70rem}
#dev-banner{background:var(--hot);color:#fff;text-align:center;font-size:13px;font-weight:700;letter-spacing:.02em;padding:4px}
header.top{background:var(--hdr);color:var(--on-hdr)}header.top .w{display:flex;flex-wrap:wrap;gap:8px 28px;align-items:center;justify-content:space-between;padding-top:14px;padding-bottom:14px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--on-hdr);text-decoration:none;letter-spacing:-.02em}
.brand svg{color:var(--accent)}.brand i{font-style:normal;font:700 10px/1 var(--mono);letter-spacing:.14em;border:1px solid currentColor;border-radius:3px;padding:3px 5px;color:var(--hot)}
.main-nav{display:flex;flex-wrap:wrap;gap:4px 20px}.main-nav a{font-size:15px;color:var(--on-hdr);opacity:.72;text-decoration:none;padding:4px 0;border-bottom:2px solid transparent}.main-nav a:hover,.main-nav a[aria-current]{opacity:1;border-color:var(--hot)}
main{padding:30px 0 60px}h1{font-size:clamp(30px,5.6vw,46px);line-height:1.08;margin:8px 0 16px;letter-spacing:-.035em;font-weight:800}h2{font-size:23px;margin:38px 0 8px;line-height:1.2;letter-spacing:-.02em}h3{font-size:18px;margin:0 0 6px}
.lead{font-size:19px;color:var(--muted)}.meta{font-size:14px;color:var(--muted)}.crumbs{font-size:13px;color:var(--muted);margin-bottom:6px;font-family:var(--mono)}.crumbs a{color:var(--muted)}
.hero{background:var(--hdr);color:var(--on-hdr);margin:-30px 0 28px;padding:44px 0 40px}.hero .w{max-width:70rem}.hero h1{max-width:20ch}.hero .lead{color:var(--on-hdr);opacity:.78;max-width:44rem}
.hero .answer{background:rgba(255,255,255,.07);border:1px dashed rgba(255,255,255,.35);border-left:0;color:var(--on-hdr);max-width:44rem}.hero .answer b{color:#fff}
.hero .btn.ghost{color:var(--on-hdr);border-color:rgba(255,255,255,.5)}
.answer{background:var(--accent-soft);border-radius:4px;border-left:5px solid var(--accent);padding:12px 18px;margin:18px 0}.answer p{margin:0}
.cta{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 4px}.btn{display:inline-block;background:var(--accent);color:var(--on-accent);text-decoration:none;font-weight:700;padding:11px 20px;border-radius:999px;border:2px solid var(--accent);cursor:pointer;font:inherit;font-weight:700}
.btn.ghost{background:transparent;color:var(--accent)}.btn:hover{filter:brightness(1.1)}.btn:focus-visible,input:focus-visible,select:focus-visible,.chip:focus-visible,summary:focus-visible{outline:3px solid var(--hot);outline-offset:2px}
.cards{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}.card{display:block;background:var(--panel);border:2px solid var(--line);border-radius:4px;padding:16px 18px;color:var(--ink);text-decoration:none;position:relative}.card:hover{border-color:var(--accent)}.card h3{color:var(--accent)}.card p{margin:0;color:var(--muted);font-size:15px}
.split{display:grid;gap:22px;align-items:start;margin:20px 0}@media (min-width:60rem){.has-split .w{max-width:70rem}.split{grid-template-columns:minmax(0,1.15fr) minmax(0,1fr)}.split .result{position:sticky;top:16px}}
.calc{background:var(--panel);border:2px solid var(--line);border-radius:4px;padding:6px 18px 18px;margin:0}fieldset{border:0;padding:0;margin:14px 0}legend{font:700 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.12em;color:var(--accent);padding:0;margin-bottom:10px}
.grid{display:grid;gap:12px 16px;grid-template-columns:repeat(auto-fit,minmax(11rem,1fr))}.f{display:flex;flex-direction:column;gap:3px;font-size:15px}.f span{font-weight:700}.f small{color:var(--muted);font-size:13px;line-height:1.3}
input,select{font:16px var(--mono);padding:9px 10px;border:2px solid var(--line);border-radius:4px;background:var(--wash);color:var(--ink);width:100%}select{font-family:inherit}
.presets{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:14px;color:var(--muted)}.chip{font:inherit;font-size:14px;border:2px solid var(--line);background:var(--wash);color:var(--ink);padding:4px 12px;border-radius:999px;cursor:pointer}.chip:hover{border-color:var(--accent)}
.result{background:var(--panel);border:2px dashed var(--ink);border-radius:2px;padding:6px 20px 18px;margin:0;font-family:var(--mono);position:relative}.result:before,.result:after{content:"";position:absolute;left:-2px;right:-2px;height:10px;background:radial-gradient(circle at 8px -1px,transparent 6px,var(--bg) 7px) repeat-x;background-size:16px 10px}.result:before{top:-11px;transform:scaleY(-1)}.result:after{bottom:-11px}
.result h2{margin:14px 0 4px;font:700 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.14em;color:var(--muted);text-align:center}
.res{display:block;margin:0 0 10px}.res>div{display:flex;justify-content:space-between;align-items:baseline;gap:14px;border-bottom:1px dashed var(--line);padding:8px 0;margin:0}.res dt{font-size:13px;color:var(--muted);font-family:system-ui,sans-serif}.res dd{margin:0;font-size:17px;font-weight:700;text-align:right}
.res .big{display:block;border:0;border-top:2px solid var(--ink);border-bottom:2px solid var(--ink);margin:6px 0;padding:12px 0;text-align:center}.res .big dt{font:700 12px/1 var(--mono);text-transform:uppercase;letter-spacing:.12em}.res .big dd{font-size:38px;line-height:1.1;margin:6px 0;text-align:center;color:var(--hot)}.res .big span{font:13px system-ui,sans-serif;color:var(--muted)}
.warn{color:var(--bad);font:600 14px/1.45 system-ui,sans-serif}.verdict{margin:8px 0 14px;font:15px/1.5 system-ui,sans-serif}.pos{color:var(--good);font-weight:700}.neg{color:var(--bad);font-weight:700}
.tw{overflow-x:auto;margin:14px 0;border:2px solid var(--line);border-radius:4px;background:var(--panel)}table{border-collapse:collapse;width:100%;font-size:15px}caption{caption-side:top;text-align:left;font-size:13px;color:var(--muted);padding:8px 10px;font-family:var(--mono)}th,td{border-top:1px solid var(--line);border-left:1px solid var(--line);padding:7px 10px;text-align:right;font-variant-numeric:tabular-nums}th:first-child,td:first-child{border-left:0}th[scope=row],thead th:first-child{text-align:left}thead th{background:var(--accent-soft);font-size:13px}
main>.w>table,.w>table{border:2px solid var(--line);background:var(--panel)}
.formula{counter-reset:s;list-style:none;padding:0}.formula li{counter-increment:s;margin:10px 0;padding-left:46px;position:relative}.formula li:before{content:counter(s);position:absolute;left:0;top:-1px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:var(--on-accent);font:700 15px/32px var(--mono);text-align:center}
ul.rel{padding-left:20px}
details{border:2px solid var(--line);border-radius:4px;padding:10px 14px;margin:8px 0;background:var(--panel)}summary{cursor:pointer;font-weight:700}details p{margin:8px 0 0}
footer{background:var(--hdr);color:var(--on-hdr);opacity:1;font-size:14px;padding:26px 0 40px}footer a{color:var(--on-hdr)}.age{border:1px solid var(--hot);border-radius:4px;padding:10px 14px;color:var(--on-hdr)}.age b:first-child{color:var(--hot)}.fnav a{opacity:.75}.small{font-size:13px;opacity:.7}
@media (max-width:600px){.res .big dd{font-size:32px}th,td{padding:6px 7px;font-size:14px}.hero{padding:30px 0 28px}}
@media print{header.top,footer,.presets,#share,.cta{display:none}body{background:#fff;color:#000}}