:root{--ink:#223044;--muted:#6e7b90;--line:#e2e7ef;--blue:#4966e9;--bg:#f7f8fb;--card:#fff;--soft:#f3f5fb;--error:#b43c45;--success:#288269}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:14px/1.6 system-ui,-apple-system,'Segoe UI',sans-serif}body.dark{--ink:#e4eaf4;--muted:#a5b2c6;--line:#344155;--bg:#151e2c;--card:#1e2a3b;--soft:#253247;--error:#ff9da5;--success:#6dd1ac}button,input,select,textarea{font:inherit}button,summary{cursor:pointer}button{border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);padding:8px 12px}button:disabled{opacity:.45;cursor:default}button:hover:not(:disabled){filter:brightness(.97)}:focus-visible{outline:3px solid #9bafff;outline-offset:3px}a{color:var(--blue)}header,main,footer{max-width:1200px;margin:auto}header{display:flex;align-items:center;gap:28px;padding:24px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:8px;text-decoration:none;color:var(--ink);font-size:25px;font-weight:750;letter-spacing:-1px}.brand span{background:var(--blue);color:#fff;border-radius:10px;padding:0 7px}nav{display:flex;gap:18px}nav a{font-size:12px;text-decoration:none;color:var(--muted)}nav a[aria-current]{color:var(--blue);font-weight:700}#theme{margin-left:auto;font-size:12px}main{padding:0 24px}.intro{text-align:center;padding:42px 8px 30px}.eyebrow{font-size:10px;letter-spacing:1.8px;color:var(--blue);font-weight:750}h1{font-size:clamp(30px,4vw,43px);line-height:1.2;letter-spacing:-1.5px;margin:12px 0}h2{font-size:24px;letter-spacing:-.5px;margin:4px 0}h3{font-size:13px;margin:0 0 10px}.intro>p:last-child,.muted{color:var(--muted)}.filters{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:0 0 24px;font-size:12px;color:var(--muted)}.filters label{display:flex;align-items:center;gap:10px}.category-section{margin-bottom:25px}.category-section h2{font-size:14px;margin:0 0 10px}.tool-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.tool{background:var(--card);text-align:left;border-radius:12px;padding:18px;min-height:146px;transition:transform .15s,box-shadow .15s}.tool:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 8px 25px #2230440a}.icon{display:grid;place-items:center;width:38px;height:38px;border-radius:10px;background:var(--tint);color:var(--color);font-size:22px;margin-bottom:10px}.tool strong{display:block;font-size:14px}.tool p{margin:4px 0 0;color:var(--muted);font-size:12px}.tool .unavailable{font-size:10px;display:block;margin-top:7px}.workspace{background:var(--card);border:1px solid var(--line);border-radius:15px;padding:22px;margin:26px 0;scroll-margin-top:12px}.workspace-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.workspace-head .eyebrow{margin:0}.toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:18px}.toolbar>div,.downloads,.verify-row{display:flex;gap:7px;flex-wrap:wrap;align-items:center}.toolbar button,.toolbar select,.downloads button{font-size:12px}.editor{display:grid;grid-template-columns:310px minmax(0,1fr);gap:28px;margin-top:20px}.editor aside{border-right:1px solid var(--line);padding-right:23px}.fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.fields .wide,.wide{grid-column:1/-1}label{display:flex;flex-direction:column;gap:5px;font-size:12px;min-width:0}input,select,textarea{border:1px solid var(--line);border-radius:7px;background:var(--card);color:var(--ink);padding:8px;min-width:0;max-width:100%}input[type=color]{width:100%;height:35px;padding:3px}input[type=range]{padding:5px 0;accent-color:var(--blue)}input[type=checkbox]{accent-color:var(--blue)}.check{flex-direction:row;align-items:center;gap:8px}textarea{resize:vertical;min-height:90px}#content-fields label{margin-bottom:11px}#content-fields textarea{min-height:100px}.small{font-size:11px;color:var(--muted);line-height:1.6}details{border-top:1px solid var(--line);padding-top:12px;margin-top:15px}summary{font-size:12px;font-weight:650;margin-bottom:12px}.preview-column{min-width:0}.preview-stage{display:flex;align-items:center;justify-content:center;min-height:300px;padding:24px;border:1px solid var(--line);border-radius:12px;background:repeating-conic-gradient(#f3f4f8 0% 25%,#fff 0% 50%) 50%/20px 20px}.preview-stage img{display:block;width:100%;height:320px;max-width:100%;max-height:450px;object-fit:contain;filter:drop-shadow(0 2px 4px #22304412)}#preview-empty{color:#657085;font-size:13px}#validation{font-size:12px;margin-top:14px;color:var(--success)}#validation.error,#sheet-status.error{color:var(--error)}.encoded{overflow-wrap:anywhere;max-height:75px;overflow:auto;padding:9px;background:var(--soft);border-radius:7px;white-space:pre-wrap}.verify-row{font-size:11px;color:var(--muted);margin:15px 0}.export{border-top:1px solid var(--line);padding-top:15px}.export label{max-width:300px}.downloads{margin-top:12px}.primary{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:650}#action-status{min-height:18px}.paper-stage{border:1px solid var(--line);border-radius:10px;background:var(--soft);padding:20px;max-height:650px;overflow:auto;text-align:center}.paper-stage img{display:block;max-width:100%;max-height:600px;margin:auto;box-shadow:0 3px 15px #0002}#sheet-page{max-width:150px}#sheet-status{font-size:12px;color:var(--success)}#sheet-fit{margin-top:12px;width:100%}.scanner-layout{display:grid;grid-template-columns:1fr 1fr;gap:25px;margin-top:20px}.drop{border:1.5px dashed #9cafe9;border-radius:10px;padding:25px;background:var(--soft)}#camera{width:100%;max-height:420px;object-fit:contain;background:#111;margin-top:15px;border-radius:10px}#scan-results{width:100%;height:270px;margin-bottom:10px}.trust{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:27px 6px}.trust b{font-size:12px}.trust p{font-size:11px;color:var(--muted);margin:4px 0}.limits{font-size:12px;color:var(--muted);padding-bottom:18px}footer{border-top:1px solid var(--line);padding:20px 24px;color:var(--muted);font-size:12px;font-weight:650}footer span{float:right;font-size:11px;font-weight:400}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}@media(max-width:900px){.tool-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.editor{grid-template-columns:260px minmax(0,1fr);gap:18px}.editor aside{padding-right:16px}header{gap:18px}}@media(max-width:650px){header{padding:16px;flex-wrap:wrap;gap:12px}nav{order:3;width:100%;justify-content:space-between;gap:8px}#theme{margin-left:auto}main{padding:0 14px}.intro{padding:28px 0 22px}.filters{align-items:start}.filters>span{max-width:130px;font-size:10px}.tool-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px}.tool{padding:14px;min-height:150px}.workspace{padding:14px}.editor,.scanner-layout{grid-template-columns:1fr}.editor aside{border-right:0;border-bottom:1px solid var(--line);padding:0 0 18px}.preview-stage{min-height:220px;padding:18px}.toolbar>div{width:100%}.toolbar select{max-width:150px}.trust{grid-template-columns:1fr;gap:15px}.workspace-head h2{font-size:22px}.paper-stage{padding:10px}.filters select{max-width:180px}}