:root{--bg:#f4f7f9;--card:#fff;--ink:#12263a;--mute:#51657a;--line:#d5dee6;--accent:#ffd23f;--accent-ink:#12263a;--bad:#b3261e;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root{--bg:#0e1a26;--card:#16273a;--ink:#eaf1f7;--mute:#9fb2c4;--line:#2a3f55;--bad:#ff8a80}}
*,*::before,*::after{box-sizing:inherit}
html{scroll-padding-top:env(safe-area-inset-top,0px)}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Bricolage Grotesque",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.6}
a{color:inherit}
.wrap{max-width:720px;margin:0 auto;padding:20px 16px 48px}
header{display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;align-items:center;padding:8px 0 24px}
.logo{font-weight:800;font-size:1.15rem;text-decoration:none}
.logo span{background:var(--accent);color:var(--accent-ink);padding:2px 8px;border-radius:4px;margin-right:2px}
nav{display:flex;flex-wrap:wrap;gap:4px 16px;font-size:.95rem}
nav a{color:var(--mute);text-decoration:none}
nav a:hover,nav a:focus-visible{color:var(--ink);text-decoration:underline}
h1{font-size:clamp(2rem,6vw,3rem);line-height:1.1;margin:0 0 8px;font-weight:800}
h2{font-size:1.4rem;margin:40px 0 8px}
.lead{color:var(--mute);margin:0 0 24px;max-width:56ch}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px}
.row{display:grid;grid-template-columns:1fr;gap:16px}
@media (min-width:560px){.row{grid-template-columns:repeat(3,1fr)}}
label{display:block;font-weight:600;font-size:.95rem;margin-bottom:4px}
small{display:block;color:var(--mute);font-size:.8rem;margin-top:4px}
input{width:100%;font:inherit;font-size:1.1rem;padding:10px 12px;border:1px solid var(--line);border-radius:8px;background:var(--bg);color:var(--ink)}
a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.out{margin-top:20px;padding:20px;border-radius:10px;background:var(--accent);color:var(--accent-ink)}
.out .big{font-size:clamp(2.4rem,9vw,3.6rem);font-weight:800;line-height:1}
.out p{margin:8px 0 0}
.out.warn{background:var(--card);color:var(--ink);border:2px solid var(--bad)}
.formula{font-weight:600;background:var(--card);border-left:6px solid var(--accent);padding:12px 16px;border-radius:4px;overflow-x:auto;white-space:nowrap}
.tbl{overflow-x:auto}
table{border-collapse:collapse;width:100%;min-width:420px;background:var(--card)}
th,td{text-align:left;padding:8px 12px;border-bottom:1px solid var(--line)}
details{background:var(--card);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin-bottom:8px}
summary{cursor:pointer;font-weight:600}
details p{margin:8px 0 0;color:var(--mute)}
.tool{display:block;background:var(--card);border:2px solid var(--ink);border-radius:12px;padding:20px;text-decoration:none;margin-bottom:12px}
.tool strong{font-size:1.2rem;display:block}
.tool span{color:var(--mute)}
.tool:hover{background:var(--accent);color:var(--accent-ink)}
.tool:hover span{color:var(--accent-ink)}
.soon{color:var(--mute)}
footer{margin-top:48px;color:var(--mute);font-size:.85rem;border-top:1px solid var(--line);padding-top:16px;display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:space-between}
footer nav{font-size:.85rem}