:root{color-scheme:dark;--bg:#080d13;--card:#111923;--line:#293542;--ink:#f1f5f8;--muted:#a8b6c5;--acid:#c7ff32;--cyan:#65d6ee;--red:#ff8585;--amber:#ffd17d}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.5 Arial,Helvetica,sans-serif}.shell{max-width:1120px;margin:auto;padding:30px 36px 20px}header,footer,.card-heading,.preview-tools{display:flex;align-items:center;justify-content:space-between;gap:16px}header{padding-bottom:30px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-size:21px;font-weight:800;letter-spacing:-.7px}.brand small{display:block;font:10px/1.7 monospace;letter-spacing:2px;color:var(--muted)}.mark{background:var(--acid);color:var(--bg);width:43px;height:43px;display:grid;place-items:center;position:relative;border-radius:10px;font-size:28px}.mark span{position:absolute;font-size:14px;bottom:2px;right:5px}.language select{border:1px solid var(--line);background:var(--card);color:var(--ink);padding:11px;border-radius:8px;font:700 12px monospace;cursor:pointer}.intro{padding:42px 0 30px}.eyebrow{font:700 10px/1.4 monospace;letter-spacing:2px;color:var(--cyan);margin:0 0 12px}h1{font-size:clamp(30px,4.2vw,45px);line-height:1.1;letter-spacing:-1.7px;margin:0 0 16px;max-width:800px}.lead{font-size:16px;color:var(--muted);margin:0 0 16px;max-width:770px}.privacy{display:inline-flex;gap:7px;color:var(--muted);font-size:12px}.privacy>span:first-child{color:var(--acid);font-size:10px}.workspace{display:grid;grid-template-columns:1.2fr 1fr;gap:18px}.card{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:24px}.card-heading{margin-bottom:20px}h2{font-size:17px;line-height:1.3;letter-spacing:-.3px;margin:0}.card-heading h2{display:flex;align-items:center;gap:12px}.step{font:12px monospace;color:var(--cyan)}.unit{font:11px monospace;color:var(--muted);border:1px solid var(--line);border-radius:5px;padding:3px 7px}.drop{width:100%;height:334px;border:1px dashed #456073;border-radius:10px;background:#0a111a;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--ink);gap:9px;cursor:pointer;font:inherit;transition:border-color .15s,background .15s}.drop:hover,.drop.drag{border-color:var(--acid);background:#121e20}.drop strong{font-size:17px}.drop>span:not(.upload-icon){color:var(--cyan);font-size:13px}.drop small{color:var(--muted);font-size:11px;margin-top:8px}.upload-icon{font-size:32px;line-height:1;width:60px;height:60px;border:1px solid var(--line);border-radius:14px;display:grid;place-items:center;margin-bottom:10px;color:var(--acid)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.text-button{font:12px Arial,sans-serif;cursor:pointer;color:var(--cyan);background:none;border:0;padding:7px 0}.preview{height:300px;display:flex;align-items:center;justify-content:center;border-radius:9px;overflow:hidden;border:1px solid #374252}.preview img{display:block;max-height:96%;max-width:96%;object-fit:contain}.checker{background-color:#c9cdd1;background-image:conic-gradient(#929ba5 25%,transparent 0 50%,#929ba5 0 75%,transparent 0);background-size:18px 18px}.dark{background:#151515}.light{background:#fff}.preview-tools{margin-top:12px;font-size:10px;color:var(--muted)}.swatches{display:flex;gap:8px;flex-shrink:0}.swatch{width:25px;height:25px;border:2px solid transparent;border-radius:50%;cursor:pointer;outline-offset:3px}.swatch[aria-pressed=true]{outline:2px solid var(--acid)}.filename{font-size:12px;overflow-wrap:anywhere;margin:14px 0 3px}.fileinfo{font:11px monospace;color:var(--muted);margin:0}.dimensions{display:grid;grid-template-columns:minmax(0,1fr) 18px minmax(0,1fr);gap:12px}.dimensions label>span{display:block;color:var(--muted);font-size:12px;margin-bottom:7px}.dimensions input{width:100%;border:1px solid #415062;background:#080f18;color:var(--ink);padding:11px 14px;border-radius:7px;font:22px monospace}.times{align-self:end;margin-bottom:14px;color:var(--muted)}input[type=checkbox],input[type=radio]{accent-color:var(--acid);width:16px;height:16px;flex-shrink:0}.check-row{display:flex;gap:8px;align-items:center;font-size:12px;margin-top:14px;cursor:pointer}.muted{font-size:11px;color:var(--muted);margin:10px 0 22px}.settings-card fieldset{border:0;border-top:1px solid var(--line);padding:17px 0 0;margin:0 0 20px}.settings-card legend{font-size:12px;padding:0 8px 0 0}.radio{display:flex;align-items:start;gap:9px;cursor:pointer;margin:0 0 14px}.radio strong{display:block;font-size:13px}.radio small{display:block;color:var(--muted);font-size:11px;margin-top:2px}.primary{display:flex;justify-content:space-between;align-items:center;width:100%;border:0;border-radius:8px;background:var(--acid);color:#0c1115;padding:15px 17px;font-size:14px;font-weight:700;cursor:pointer;transition:background .15s}.primary:hover{background:#d8ff78}.primary:disabled{background:#293a34;color:#a1b1a9;cursor:not-allowed}.cancel{width:100%;text-align:center}.progress{font-size:12px;margin:10px 0 0;color:var(--cyan);min-height:18px}.result{margin-top:18px}.result-head{display:flex;align-items:center;gap:17px}.result-head .eyebrow{font-size:9px;margin-bottom:6px}.result-head h2{font-size:23px;letter-spacing:-.6px}.result-head p:last-child{margin:8px 0 0;font-size:13px;color:var(--muted)}#result-icon{display:grid;place-items:center;width:47px;height:47px;flex-shrink:0;background:#1d2b37;color:var(--muted);border-radius:50%;font:26px monospace}.result.pass{border-color:#537333}.result.pass #result-icon{background:#283e1b;color:var(--acid)}.result.warn{border-color:#76603c}.result.warn #result-icon{background:#3b2e1b;color:var(--amber)}.result.fail,.result.error{border-color:#844c52}.result.fail #result-icon,.result.error #result-icon{background:#42252c;color:var(--red)}.facts{display:grid;grid-template-columns:repeat(3,1fr);margin-top:24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:17px 0;gap:16px}.fact small{display:block;color:var(--muted);font-size:11px}.fact strong{font:18px/1.7 monospace}.issues{list-style:none;padding:0;margin:6px 0 0}.issue{position:relative;padding:16px 0 16px 23px;border-bottom:1px solid var(--line)}.issue::before{content:'!';position:absolute;left:0;top:17px;color:var(--amber);font-weight:bold}.issue.fail::before{color:var(--red)}.issue strong{font-size:14px}.issue p{font-size:13px;color:var(--muted);margin:5px 0 0}.recommendation{font-size:13px;color:var(--cyan);margin:20px 0 0}.scope{font-size:11px;color:var(--muted);margin:18px 0 0;max-width:860px}.how{margin:22px 0 30px;font-size:12px;color:var(--muted)}.how summary{cursor:pointer;padding:8px 0;color:var(--ink)}.how p{max-width:850px;margin:8px 0}footer{border-top:1px solid var(--line);padding-top:18px;font-size:10px;color:var(--muted)}footer a{color:var(--ink);white-space:nowrap;text-decoration:none}:focus-visible{outline:2px solid var(--cyan);outline-offset:4px}button:disabled{cursor:not-allowed}[hidden]{display:none!important}
@media(max-width:760px){.shell{padding:20px 18px}.workspace{grid-template-columns:1fr}.intro{padding:30px 0 24px}h1{letter-spacing:-1px}.card{padding:20px}.drop{height:230px}.preview{height:290px}.facts{grid-template-columns:1fr;gap:10px}.fact{display:flex;justify-content:space-between;align-items:center}.fact strong{font-size:16px}.result-head{align-items:start}.result-head h2{font-size:21px}footer{align-items:start;gap:20px}.settings-card .muted{max-width:420px}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}