:root{
  --ink:#0d1b26; --ink-2:#41586a; --muted:#7b8fa0;
  --bg:#f4f7f9; --card:#fff; --line:#dfe8ee;
  --water:#0a7ea4; --water-deep:#075b77; --water-lite:#d3edf6;
  --pass:#0f7b52; --pass-bg:#e4f6ed;
  --fail:#b4472c; --fail-bg:#fdeee8;
  --sun:#f0a202;
  --radius:14px;
  --shadow:0 1px 2px rgba(13,27,38,.06),0 8px 24px -12px rgba(13,27,38,.18);
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.55 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif}
.wrap{max-width:900px;margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.2;margin:0 0 .4em;letter-spacing:-.015em}

.top{background:linear-gradient(160deg,#075b77,#0a7ea4 55%,#26a3c4);color:#fff;padding:30px 0 34px;
  margin-bottom:26px}
.brand{margin:0;font-size:13px;letter-spacing:.2em;text-transform:uppercase;font-weight:800;opacity:.85}
.tag{margin:10px 0 0;font-size:clamp(20px,3.4vw,29px);font-weight:650;letter-spacing:-.02em;
  max-width:22ch;line-height:1.2;text-wrap:balance}

.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;margin:0 0 18px;box-shadow:var(--shadow)}
.panel h1{font-size:23px}
.panel h2{font-size:19px}
.panel h3{font-size:13px;text-transform:uppercase;letter-spacing:.1em;color:var(--muted);margin-bottom:12px}
.lede{color:var(--ink-2);margin:0 0 18px;text-wrap:pretty}

form{display:flex;gap:10px;flex-wrap:wrap}
input{flex:1 1 320px;font:inherit;padding:12px 14px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink)}
input:focus{outline:2px solid var(--water);outline-offset:1px;border-color:var(--water)}
button{font:inherit;font-weight:650;padding:12px 20px;border:0;border-radius:10px;background:var(--water);color:#fff;cursor:pointer}
button:hover:not(:disabled){background:var(--water-deep)}
button:disabled{opacity:.6;cursor:default}

.examples{margin:14px 0 0;font-size:13px;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.ex{background:#eef5f8;color:var(--water-deep);font-weight:500;font-size:12.5px;padding:6px 11px;border-radius:99px}
.ex:hover{background:var(--water-lite)}

.steps{list-style:none;margin:0;padding:0;display:grid;gap:2px}
.steps li{display:grid;grid-template-columns:22px 1fr auto;gap:12px;align-items:center;padding:9px 0;color:var(--muted)}
.steps .dot{width:11px;height:11px;border-radius:50%;background:var(--line);justify-self:center}
.steps .detail{font-size:13px;color:var(--muted);text-align:right}
.steps li.running{color:var(--ink)}
.steps li.running .dot{background:var(--water);animation:pulse 1.1s ease-in-out infinite}
.steps li.done{color:var(--ink)}
.steps li.done .dot{background:var(--pass)}
.steps li.skipped .dot{background:var(--line);box-shadow:inset 0 0 0 2px var(--muted)}
.steps li.failed{color:var(--fail)}
.steps li.failed .dot{background:var(--fail)}
.steps li.failed .detail{color:var(--fail)}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.8)}}

.verdict .badge{display:inline-block;margin:0 0 10px;font-size:11px;font-weight:800;letter-spacing:.12em;
  text-transform:uppercase;padding:5px 10px;border-radius:99px}
.verdict.pass{border-color:#b9e3ce}
.verdict.pass .badge{background:var(--pass-bg);color:var(--pass)}
.verdict.fail{border-color:#f3cfc2}
.verdict.fail .badge{background:var(--fail-bg);color:var(--fail)}
.verdict h2{font-size:clamp(20px,3vw,26px);text-wrap:balance}
.warn{margin:14px 0 0;padding:12px 14px 12px 30px;background:#fff8e8;border-radius:10px;font-size:14px;color:#7a5a12}
.warn li{margin:2px 0}

.caveat{margin:14px 0 0;padding:12px 14px;background:#fff8e8;border-left:3px solid #e8b923;
  border-radius:8px;font-size:14px;color:#7a5a12;line-height:1.5}
.caveat strong{color:#5c430d}

.pair{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.pair.one{grid-template-columns:1fr;max-width:460px;margin:0 auto}
.pair figure{margin:0}
.pair img{width:100%;display:block;border-radius:10px;background:#c9d6de;aspect-ratio:1/1;object-fit:cover}
.pair figcaption{margin-top:8px;font-size:12.5px;color:var(--muted);text-align:center}
@media(max-width:620px){.pair{grid-template-columns:1fr}}

.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px}
.tile{background:#f7fafb;border:1px solid var(--line);border-radius:12px;padding:14px}
.tile .n{display:block;font-size:26px;font-weight:700;letter-spacing:-.02em;color:var(--water-deep)}
.tile .n em{font-style:normal;font-size:14px;font-weight:600;color:var(--water);margin-left:3px}
.tile .l{display:block;margin-top:3px;font-size:12.5px;color:var(--ink-2);line-height:1.35}

.readout{display:grid;gap:8px}
.rw{display:grid;grid-template-columns:160px 1fr;gap:14px;align-items:baseline;
  border-bottom:1px solid var(--line);padding-bottom:8px;font-size:14.5px}
.rw:last-child{border-bottom:0}
.rw .k{color:var(--muted);font-size:12.5px;text-transform:uppercase;letter-spacing:.06em;font-weight:600}
@media(max-width:620px){.rw{grid-template-columns:1fr;gap:2px}}

.actions{display:flex;gap:12px;flex-wrap:wrap}
.btn{display:inline-block;padding:12px 20px;border-radius:10px;background:var(--water);color:#fff;
  text-decoration:none;font-weight:650}
.btn:hover{background:var(--water-deep)}
.btn.ghost{background:transparent;color:var(--water-deep);box-shadow:inset 0 0 0 1.5px var(--line)}
.btn.ghost:hover{background:var(--water-lite)}

#recent{display:grid;gap:8px}
.rec{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:baseline;padding:10px 12px;
  border-radius:10px;text-decoration:none;color:var(--ink);border:1px solid var(--line);font-size:14px}
.rec:hover{border-color:var(--water);background:#f7fbfd}
.rec .rv{font-size:12.5px;color:var(--muted);text-align:right}
.rec.ok{border-left:3px solid var(--pass)}
.rec.no{border-left:3px solid var(--line);opacity:.72}
@media(max-width:620px){.rec{grid-template-columns:1fr}.rec .rv{text-align:left}}

.how-list{margin:0;padding-left:20px;color:var(--ink-2);line-height:1.6}
.how-list li{margin-bottom:9px}
.how-list strong{color:var(--ink)}
.econ{margin:16px 0 0;padding:13px 15px;background:var(--water-lite);border-radius:10px;color:var(--water-deep)}

.foot{padding:10px 20px 60px;color:var(--muted);font-size:12.5px}

@media (prefers-color-scheme: dark){
  :root{--ink:#e8f0f5;--ink-2:#a8bccb;--muted:#7f95a5;--bg:#0b1319;--card:#131f28;--line:#243440;
        --water:#3fb6dc;--water-deep:#8ad4ee;--water-lite:#12303d;
        --pass:#4bcb92;--pass-bg:#0f2f22;--fail:#f0876a;--fail-bg:#2e1611;
        --shadow:0 1px 2px rgba(0,0,0,.4),0 8px 24px -12px rgba(0,0,0,.7)}
  .top{background:linear-gradient(160deg,#06232e,#0a5670 60%,#0d6f8c)}
  input{background:#0d181f}
  button{color:#04222e}
  .ex{background:#16303c;color:var(--water-deep)}
  .tile{background:#101b23}
  .warn{background:#2a2213;color:#e3c785}
  .caveat{background:#2a2213;color:#e3c785;border-left-color:#a8871f}
  .caveat strong{color:#f2dfa6}
  .rec:hover{background:#101f28}
  .btn{color:#04222e}
  .btn.ghost{color:var(--water-deep)}
}