:root{--ink:#17243b;--muted:#55637b;--blue:#1549e5;--paper:#f7f9fc;--line:#d9e0ec;--good:#146b4e;--bad:#b22e38;--display:Georgia,'Times New Roman',serif;--body:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;--code:'SFMono-Regular',Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);line-height:1.6;font-size:15px}a{color:var(--blue);text-underline-offset:4px}button,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.48}:focus-visible{outline:3px solid #ec9700;outline-offset:4px}a:hover{color:#0d2f98}.top,main,footer{max-width:1240px;margin:auto}.top{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:26px 40px;border-bottom:1px solid var(--line)}.brand{display:inline-flex;align-items:center;gap:12px;color:var(--ink);font-size:17px;text-decoration:none;letter-spacing:-.4px}.brand strong{color:var(--blue)}nav{display:flex;align-items:center;gap:27px;font-size:13px}nav a{color:var(--muted);text-decoration:none}.beta{color:var(--blue);font-size:12px;background:#eaf0ff;border:1px solid #c8d6ff;border-radius:5px;padding:4px 9px}main{padding:0 40px}.hero{padding:76px 0 70px;display:grid;grid-template-columns:1.45fr 1fr;gap:70px;align-items:center}.eyebrow{font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--muted)}.dot{display:inline-block;height:7px;width:7px;background:var(--blue);border-radius:50%;margin-right:7px}h1{font-weight:500;font-size:clamp(37px,4.4vw,58px);letter-spacing:-2px;line-height:1.13;margin:22px 0}h1 em{font-style:normal;color:var(--blue);font-family:var(--display);letter-spacing:-1.7px}.intro{color:var(--muted);max-width:520px;font-size:17px;line-height:1.7;margin:22px 0 28px}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;min-height:46px;border-radius:5px;border:1px solid transparent;padding:11px 18px;text-decoration:none;font-size:14px;font-weight:600}.primary{background:var(--blue);color:white}.primary:hover{background:#0b36b5;color:white}.secondary{background:white;border-color:var(--line);color:var(--ink)}.secondary:hover:not(:disabled){border-color:var(--blue);color:var(--blue)}.quiet{font-size:12px;color:var(--muted)}.hero .quiet{margin:12px 0 0}.receipt{background:white;border:1px solid var(--line);border-top:4px solid var(--blue);box-shadow:14px 16px 0 #e9eef8;transform:rotate(1deg);padding:24px 25px 12px}.receipt-top,.receipt-bottom{display:flex;justify-content:space-between;gap:8px;font-size:10px;font-family:var(--code);letter-spacing:.03em;color:var(--muted)}.receipt-top{padding-bottom:25px;border-bottom:1px dashed var(--line);color:var(--ink)}.receipt-line{display:flex;justify-content:space-between;gap:10px;padding:17px 0;border-bottom:1px solid #eef1f7;font-size:13px}.receipt-line b{font-size:12px;font-weight:500}.good{color:var(--good)}.bad{color:var(--bad)}.receipt-result{padding:24px 0 19px}.receipt-result span{display:block;font:28px var(--display)}.receipt-result small{display:block;max-width:255px;color:var(--muted);margin-top:8px;font-size:12px}.receipt-bottom{border-top:1px dashed var(--line);padding-top:15px}.workbench{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden;box-shadow:0 9px 26px #20325607}.section-top{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px 30px 25px}h2{font-size:27px;line-height:1.25;letter-spacing:-.7px;margin:10px 0;font-weight:550}.section-top h2{font-size:23px;margin-bottom:0}.local{font-size:12px;color:var(--good);white-space:nowrap}.tabs{display:flex;background:#f2f5fa;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0 20px}.tabs button{background:none;border:0;border-bottom:3px solid transparent;color:var(--muted);padding:17px 21px;font-size:14px;text-align:left}.tabs button span{font:11px var(--code);margin-right:12px}.tabs button[aria-selected=true]{border-bottom-color:var(--blue);color:var(--blue);background:#fff}#workspace{padding:0 30px 27px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;padding-top:20px;font-size:13px}.toolbar p{max-width:740px}.text-button{border:0;background:transparent;padding:8px 0;color:var(--blue);font-size:13px;white-space:nowrap}.input-top{display:flex;align-items:center;justify-content:space-between;margin:5px 0 12px;font-size:12px}.input-top label{display:flex;gap:10px;align-items:center}.input-top select{font-size:12px;padding:5px 25px 5px 8px;width:auto}.editors{display:grid;grid-template-columns:1fr;gap:22px}.editors.two{grid-template-columns:1fr 1fr}.editors label{display:block;font-size:12px;font-weight:600;margin:0 0 8px}textarea{display:block;resize:vertical;width:100%;height:294px;border:1px solid #c9d3e3;border-radius:4px;background:#fbfcff;color:#263c66;padding:17px;font:12px/1.7 var(--code);tab-size:2}select{background:#fff;color:var(--ink);border:1px solid #c9d3e3;border-radius:4px;padding:10px;width:100%;font-size:13px}.actions{display:flex;align-items:center;gap:12px;margin-top:22px}.actions .quiet{margin-left:auto}.results{padding:23px 30px;background:#f7f9fd;border-top:1px solid var(--line)}.result-heading{display:flex;align-items:center;gap:13px}.result-heading h3{font-size:17px;margin:0;letter-spacing:-.3px}.stamp{border:1px solid #c9d3e3;border-radius:4px;padding:3px 7px;font:10px var(--code);color:var(--muted);white-space:nowrap}.stamp.pass,.stamp.unchanged{color:var(--good);background:#e8f5ef;border-color:#b9dbcd}.stamp.fail,.stamp.error{color:var(--bad);background:#fff0ef;border-color:#f1b9ba}.stamp.unsupported,.stamp.changed{color:#77500b;background:#fff7e2;border-color:#e9d492}#result-summary{font-size:13px;color:var(--muted);margin-bottom:0}.finding{display:grid;grid-template-columns:90px 220px 1fr;gap:15px;padding:13px 0;border-bottom:1px solid var(--line);font-size:12px}.finding:first-child{margin-top:20px;border-top:1px solid var(--line)}.finding code{font-family:var(--code);overflow-wrap:anywhere}.finding .level{font-size:10px;text-transform:uppercase;letter-spacing:.04em}.finding pre{white-space:pre-wrap;overflow-wrap:anywhere;margin:5px 0;font-size:11px}.scope{padding:18px 30px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);line-height:1.8}.scope strong{color:var(--ink);margin-right:6px}.method{display:grid;grid-template-columns:1fr 1fr;gap:95px;padding:80px 0}.method h2{font-family:var(--display);font-size:35px;font-weight:400}.method p{font-size:14px;color:var(--muted);max-width:400px}.method a{font-size:13px}.steps{list-style:none;margin:0;padding:0}.steps li{display:flex;gap:22px;padding:0 0 24px}.steps li>span{color:var(--blue);font-size:12px;padding-top:6px}.steps h3{font-size:16px;margin:0 0 5px}.steps p{margin:0 0 8px}.feedback{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:40px 0;display:grid;grid-template-columns:1fr 1fr;gap:95px}.feedback h2{font-size:26px}.feedback p{font-size:14px;color:var(--muted)}.feedback form{display:flex;flex-direction:column;gap:10px}.feedback label{font-size:12px}.feedback select{margin-bottom:9px}.feedback form p{font-size:12px;margin:0}.feedback button{align-self:flex-start}.references{padding:40px 0 48px}.references h2{font-size:17px}.references p,.references a{font-size:12px}.references p{color:var(--muted)}.references a{margin-right:25px}footer{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:25px 40px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}footer .brand{font-size:14px}footer div{display:flex;gap:20px}footer a{color:var(--muted)}.skip{position:absolute;top:-100px;left:20px;padding:10px;background:#fff;z-index:5}.skip:focus{top:10px}.nojs{padding:20px}.document{max-width:820px;margin:45px auto 80px}.document h1{font-size:42px}.document h2{font-size:23px;margin-top:35px}.document p,.document li{color:var(--muted)}.document pre{padding:20px;background:#edf1f8;overflow:auto;font-size:12px}.document code{font-family:var(--code)}.document table{border-collapse:collapse;width:100%;font-size:13px}.document td,.document th{border:1px solid var(--line);text-align:left;padding:10px}.document .callout{padding:20px;border-left:3px solid var(--blue);background:#edf2ff}[hidden]{display:none!important}@media(max-width:900px){.top,footer{padding-left:24px;padding-right:24px}main{padding:0 24px}.hero{gap:35px;padding:55px 0}.receipt{padding:20px 17px}.hero h1{font-size:40px}.method,.feedback{gap:45px}.finding{grid-template-columns:75px 170px 1fr}.actions .quiet{display:none}}@media(max-width:640px){.top{padding:18px;flex-wrap:wrap;gap:15px}.brand{font-size:15px}nav{gap:20px;width:100%;justify-content:space-between}nav a{font-size:12px}.beta{font-size:10px}main{padding:0 16px}.hero{grid-template-columns:1fr;padding:38px 0;gap:30px}.hero h1{font-size:40px;letter-spacing:-1.5px}.intro{font-size:15px}.receipt{max-width:410px;width:calc(100% - 12px);justify-self:start;margin-bottom:10px}.section-top{padding:24px 18px;display:block}.section-top h2{font-size:22px}.local{display:block;margin-top:12px}.tabs{padding:0}.tabs button{padding:15px 10px;flex:1;font-size:12px;line-height:1.4}.tabs button span{display:block;margin-bottom:5px}#workspace{padding:0 18px 23px}.toolbar{display:block}.toolbar .text-button{padding:0 0 10px}.input-top label{display:block}.input-top select{display:block;margin-top:4px}.editors.two{grid-template-columns:1fr}textarea{font-size:11px;height:270px}.actions{flex-wrap:wrap}.actions .button{font-size:12px;padding:10px 12px;gap:9px}.results{padding:23px 18px}.result-heading{align-items:flex-start}.result-heading h3{font-size:15px}.finding{grid-template-columns:70px 1fr;gap:5px}.finding>div:last-child{grid-column:2}.scope{padding:18px}.method,.feedback{grid-template-columns:1fr;gap:25px;padding:40px 0}.method h2{font-size:32px}.references a{display:block;margin-bottom:12px}footer{align-items:flex-start;flex-direction:column;padding:24px 18px}.document h1{font-size:34px}.document table{font-size:11px}.document td,.document th{padding:7px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* v0.2: familiar input controls, a compact rule editor and readable batch ledger. */
.rule-builder{margin:20px 0 12px;border:1px solid var(--line);border-radius:4px;padding:14px 16px;background:var(--paper)}
.rule-builder summary{cursor:pointer;color:var(--blue);font-size:13px;font-weight:600}
.rule-fields{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:15px;margin:15px 0}
.rule-fields label{font-size:12px;font-weight:600}
.rule-fields input{width:100%;padding:10px;border:1px solid #c9d3e3;border-radius:4px;background:#fff;color:var(--ink);font:13px var(--code)}
.rule-fields input,.rule-fields select{display:block;margin-top:7px;min-height:41px}
.rule-actions{display:flex;gap:20px;align-items:center}
.editors .file-label{display:flex;align-items:center;gap:10px;font-weight:400;font-size:11px;margin-top:10px;color:var(--muted);flex-wrap:wrap}
.file-label input{max-width:100%;font:11px var(--body)}
.file-label input::file-selector-button{padding:5px 8px;background:var(--paper);border:1px solid var(--line);border-radius:3px;color:var(--ink);cursor:pointer}
.batch-table{overflow:auto;margin-top:22px}
.batch-table table{width:100%;border-collapse:collapse;font-size:12px;text-align:left;font-variant-numeric:tabular-nums}
.batch-table caption{text-align:left;padding-bottom:10px;color:var(--muted);font-size:12px}
.batch-table th{color:var(--muted);font-size:11px;font-weight:500}
.batch-table th,.batch-table td{border-bottom:1px solid var(--line);padding:12px 14px 12px 0;min-width:90px}
.batch-table td:first-child{min-width:150px}
.actions{flex-wrap:wrap}.tabs button{padding-left:18px;padding-right:18px}
@media(max-width:640px){.rule-fields{grid-template-columns:1fr}.rule-builder{padding:12px}.tabs button{padding-left:8px;padding-right:8px}.rule-actions{flex-wrap:wrap}.actions .quiet{display:block;margin-left:0;flex-basis:100%}.document .table-wrap{overflow:auto}}