:root{--ink:#0e1a2b;--muted:#51607a;--line:#dde3ec;--bg:#f5f7fb;--card:#fff;--brand:#0f766e;--brand-ink:#fff;--bad:#c62828;--bad-bg:#fdecec;--warn:#9a5b00;--warn-bg:#fff4e0;--good:#1b7a3d;--good-bg:#e8f6ee;--r:14px}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,Inter,sans-serif;color:var(--ink);background:var(--bg)}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.top{background:#0e1a2b;color:#fff;padding:12px 0}
.brand{color:#fff;text-decoration:none;font-weight:800;letter-spacing:.2px;font-size:18px}
.mark{color:#5eead4}
.tag{font-size:13px;color:#b9c6da}
.hero{background:linear-gradient(160deg,#0e1a2b 0%,#134e4a 60%,#0f766e 140%);color:#fff;padding:44px 0 36px}
.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:1.4px;color:#99f6e4;margin:0 0 8px;font-weight:700}
.hero h1{font-size:clamp(26px,4vw,42px);line-height:1.15;margin:0 0 14px;max-width:880px}
.lede{font-size:18px;max-width:760px;color:#dbe6f5;margin:0 0 18px}
.facts{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0}
.facts li{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:999px;padding:6px 14px;font-size:14px}
.grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:22px;margin-top:-18px;align-items:start}
@media (max-width:900px){.grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;box-shadow:0 6px 24px rgba(14,26,43,.06)}
.result{position:sticky;top:16px;min-height:220px}
@media (max-width:900px){.result{position:static}}
fieldset{border:0;padding:0;margin:0 0 18px}
legend,summary{font-weight:800;font-size:17px;margin-bottom:10px;padding:0}
summary{cursor:pointer}
.card-inner{border-top:1px solid var(--line);padding-top:16px;margin:0 0 18px}
.cols{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px 14px}
@media (max-width:560px){.cols{grid-template-columns:1fr}}
label{display:flex;flex-direction:column;gap:5px;font-size:14px;font-weight:600;color:#26354d}
input,select{font:inherit;padding:10px 12px;border:1px solid #c7d0dd;border-radius:10px;background:#fff;color:var(--ink);min-height:44px;width:100%}
input:focus,select:focus{outline:3px solid rgba(15,118,110,.25);border-color:var(--brand)}
input[aria-invalid=true]{border-color:var(--bad)}
.err{color:var(--bad);font-size:13px;font-weight:600}
label.check{flex-direction:row;align-items:flex-start;gap:10px;font-weight:500;margin:10px 0}
label.check input{width:20px;height:20px;min-height:0;margin-top:2px;flex:none}
.hint{font-size:13px;color:var(--muted);margin:-4px 0 10px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:700;border-radius:10px;border:1px solid #c7d0dd;background:#fff;color:var(--ink);padding:12px 18px;min-height:46px;cursor:pointer;text-decoration:none}
.btn.primary{background:var(--brand);border-color:var(--brand);color:var(--brand-ink)}
.btn.primary:hover{filter:brightness(1.07)}
#run{width:100%;font-size:17px}
.fine{font-size:12.5px;color:var(--muted)}
.empty h2{margin-top:0}
.verdict{border-radius:12px;padding:16px 18px;margin-bottom:14px}
.verdict h2{margin:2px 0 6px;font-size:clamp(24px,3vw,32px)}
.verdict p{margin:0}
.kicker{font-size:12px;text-transform:uppercase;letter-spacing:1.2px;font-weight:700;opacity:.8}
.verdict.bad{background:var(--bad-bg);color:#5d0f0f}
.verdict.warn{background:var(--warn-bg);color:#4d2e00}
.verdict.good{background:var(--good-bg);color:#0b3d1d}
.nums{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 16px}
.nums div{background:var(--bg);border-radius:10px;padding:10px 12px}
.nums dt{font-size:12.5px;color:var(--muted)}
.nums dd{margin:0;font-weight:800;font-size:18px}
.rescue{border:2px solid var(--brand);border-radius:12px;padding:16px}
.rescue h3{margin:0 0 6px}
.big{font-size:17px}
.lock{background:#effaf8;border-radius:10px;padding:14px;margin-top:10px}
.lock .btn.primary{width:100%;margin:6px 0 10px}
.keyrow{display:flex;gap:8px}
.keyrow input{flex:1}
.moves{width:100%;border-collapse:collapse;margin:10px 0;font-size:14.5px}
.moves th,.moves td{border-bottom:1px solid var(--line);padding:9px 6px;text-align:left;vertical-align:top}
.moves .amt{text-align:right;font-weight:800;white-space:nowrap}
.why{font-size:12.5px;color:var(--muted);font-weight:400}
.note{border-radius:12px;padding:14px 16px;background:var(--bad-bg)}
.note.warn{background:var(--warn-bg)}
.note.good{background:var(--good-bg)}
.note h3{margin:0 0 6px}
.ws{margin:8px 0 12px}
.explain{margin:40px auto}
.three{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:800px){.three{grid-template-columns:1fr}}
.three div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px}
.three h3{margin:0 0 6px}
.foot{padding:20px;color:var(--muted);font-size:13px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
@media print{
  .top,.hero,form,.explain,.foot,.lock,#print{display:none!important}
  body{background:#fff}
  .grid{display:block;margin:0}
  .result{position:static;box-shadow:none;border:0}
  details{display:block}
  details>summary{list-style:none}
}
.pill{display:inline-block;background:#fff3cd;color:#6b4e00;border-radius:999px;padding:1px 8px;font-size:11px;letter-spacing:.4px;margin-left:6px;text-transform:uppercase}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cols3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px 12px}
@media (max-width:560px){.cols3{grid-template-columns:1fr}}
.yrow{border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin:0 0 10px;background:#fbfcfe}
.ylabel{margin:0 0 8px}
label.check.small{font-size:13.5px;margin:8px 0 0}
label.check.inline{align-self:end;margin:0 0 10px}
.ticks{padding-left:20px;margin:8px 0 12px}
.ticks li{margin:4px 0}
.steps td.entry{font-size:14.5px}
.steps td:first-child{white-space:nowrap}
h4{margin:16px 0 4px}
.callout{background:#effaf8;border-left:4px solid var(--brand);padding:10px 12px;border-radius:8px}
.letter{white-space:pre-wrap;font:13.5px/1.5 ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:12px;margin:8px 0;overflow-wrap:anywhere}
.btn.small{min-height:40px;padding:8px 14px;font-size:14px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
@media print{.actions,.copy{display:none!important}.letter{border:0;background:#fff}}