:root{
  --navy:#1F3864; --navy2:#2d4f8a; --ink:#1c2230; --mut:#6a7384;
  --bg:#f4f6fb; --card:#ffffff; --line:#e3e8f2; --ok:#1a8f4a; --bad:#c23b3b;
  --warn:#c98a00; --radius:14px; --shadow:0 2px 10px rgba(31,56,100,.07);
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.5}
.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:14px 22px;background:var(--navy);color:#fff}
.brand{font-weight:700;font-size:18px;letter-spacing:.2px;display:flex;align-items:center;gap:10px}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:8px;
  background:#fff;color:var(--navy);font-weight:800;font-size:13px}
.engine{font-size:12px;opacity:.75;text-transform:uppercase;letter-spacing:.5px}
.meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.usage{font-size:12px;opacity:.85}
main{max-width:980px;margin:0 auto;padding:26px 18px 70px}
.lede{color:var(--mut);max-width:640px;margin:6px 0 22px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:18px;box-shadow:var(--shadow)}
.card h2{margin:0 0 12px;font-size:15px;color:var(--navy)}
.drop{display:grid;place-items:center;min-height:120px;border:2px dashed var(--line);
  border-radius:12px;color:var(--mut);text-align:center;padding:14px;cursor:pointer;
  transition:.15s;font-size:14px}
.drop:hover,.drop.over{border-color:var(--navy2);background:#f7f9ff;color:var(--navy)}
.drop.has{border-style:solid;border-color:var(--ok);color:var(--ink);font-weight:600}
textarea{width:100%;min-height:120px;resize:vertical;border:1px solid var(--line);
  border-radius:10px;padding:12px;font:inherit;font-size:13px}
textarea:focus{outline:2px solid var(--navy2);border-color:transparent}
.actions{display:flex;gap:12px;justify-content:flex-end;margin:18px 0}
.btn{border:0;border-radius:10px;padding:11px 18px;font-weight:600;font-size:14px;cursor:pointer}
.btn.primary{background:var(--navy);color:#fff}
.btn.primary:hover{background:var(--navy2)}
.btn.ghost{background:#fff;border:1px solid var(--line);color:var(--navy)}
.btn:disabled{opacity:.5;cursor:default}
.status{margin:10px 0;padding:12px 14px;border-radius:10px;background:#eef3ff;
  color:var(--navy);font-size:14px}
.status.err{background:#fdecec;color:var(--bad)}
.scoreRow{display:flex;gap:26px;align-items:center;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);margin:8px 0 16px}
.gauge{position:relative;width:120px;height:120px;flex:none}
.gauge svg{transform:rotate(-90deg)}
.g-bg{fill:none;stroke:var(--line);stroke-width:10}
.g-fg{fill:none;stroke:var(--navy);stroke-width:10;stroke-linecap:round;
  stroke-dasharray:327;stroke-dashoffset:327;transition:stroke-dashoffset .8s ease,stroke .3s}
.g-num{position:absolute;inset:0;display:grid;place-content:center;text-align:center}
.g-num span{font-size:30px;font-weight:800;color:var(--navy)}
.g-num small{color:var(--mut);font-size:13px}
.scoreMeta{flex:1}
.metrics{display:flex;gap:26px;flex-wrap:wrap}
.metrics b{font-size:20px;color:var(--ink)}
.metrics span{display:block;font-size:12px;color:var(--mut)}
.hint{color:var(--mut);font-size:13px;margin:12px 0 0}
.cols{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.card h3{font-size:14px;margin:4px 0 10px;color:var(--navy)}
.card h3 small{color:var(--mut);font-weight:500}
.count{color:var(--bad);font-weight:700}
.chips{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:14px}
.chip{background:#fdecec;color:var(--bad);border:1px solid #f6d4d4;border-radius:20px;
  padding:4px 11px;font-size:12.5px;font-weight:600}
.chips.muted .chip{background:#eaf4ee;color:var(--ok);border-color:#cfe8d8}
.sem{list-style:none;padding:0;margin:0;font-size:13px}
.sem li{padding:6px 0;border-top:1px dashed var(--line)}
.sem b{color:var(--navy)}
.sem i{color:var(--mut);font-style:normal}
.checks{list-style:none;padding:0;margin:0;font-size:13.5px}
.checks li{display:flex;gap:9px;padding:7px 0;border-top:1px solid var(--line)}
.checks li:first-child{border-top:0}
.mark{flex:none;width:18px;height:18px;border-radius:50%;display:grid;place-items:center;
  color:#fff;font-size:11px;font-weight:800}
.mark.ok{background:var(--ok)} .mark.no{background:var(--bad)}
.checks small{color:var(--mut);display:block}
.tuneCard{margin-top:16px}
.tuneHead{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.lift{background:#eaf4ee;color:var(--ok);font-weight:700;padding:5px 12px;border-radius:20px;font-size:13px}
.downloads{display:flex;gap:10px;flex-wrap:wrap;margin:12px 0}
.dl{display:inline-flex;align-items:center;gap:7px;background:var(--navy);color:#fff;
  text-decoration:none;padding:9px 15px;border-radius:9px;font-size:13.5px;font-weight:600}
.dl.alt{background:#fff;color:var(--navy);border:1px solid var(--line)}
.preview{margin-top:8px}.preview summary{cursor:pointer;color:var(--navy);font-weight:600;font-size:13.5px}
#preview{border:1px solid var(--line);border-radius:10px;padding:16px;margin-top:10px;background:#fcfdff;font-size:13px}
#preview h1{font-size:18px;color:var(--navy);text-align:center;margin:.2rem}
#preview h2{font-size:14px;color:var(--navy);border-bottom:1px solid var(--line);margin-top:14px}
.disclaimer{color:var(--mut);font-size:12px;margin:12px 0 0}
@media(max-width:720px){.grid,.cols{grid-template-columns:1fr}.scoreRow{flex-direction:column;text-align:center}}