:root{--bg:#f6f7f3;--paper:#fff;--ink:#202c29;--muted:#67716d;--line:#e0e5df;--accent:#28634f;--accent-dark:#1d4b3b;--soft:#edf4ef;--error:#a62d24;font-family:"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0}button,input,select{font:inherit}button,a,label,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.43}a{color:inherit;text-decoration:none}button,input,select{border-radius:7px}button{transition:background .15s,border-color .15s,transform .15s}button:not(:disabled):active{transform:translateY(1px)}button:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible,select:focus-visible,pre:focus-visible{outline:3px solid #d89442;outline-offset:3px}.skip{position:absolute;top:-80px;left:16px;padding:10px;background:#fff;z-index:3}.skip:focus{top:10px}.topbar{max-width:1280px;margin:0 auto;height:84px;padding:0 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-size:24px;font-weight:750;letter-spacing:-1px;display:flex;align-items:center;gap:10px}.brand-dot{color:#c67b32;margin-left:-10px}.brandmark{display:grid;grid-template-columns:8px 8px;gap:3px;transform:rotate(-8deg)}.brandmark i{width:8px;height:8px;background:var(--accent);border-radius:1px}.brandmark i:last-child{background:#ca853e}.header-right{display:flex;align-items:center;gap:30px;font-size:13px}.header-right a:hover{color:var(--accent)}.local-badge{display:flex;align-items:center;gap:7px;color:var(--muted)}.local-badge>span{width:6px;height:6px;background:var(--accent);border-radius:50%}main{max-width:1280px;margin:auto;padding:0 28px}.title-row{padding:30px 0 24px;display:flex;justify-content:space-between;align-items:center}.eyebrow{font-size:10px;font-weight:750;letter-spacing:1.7px;color:var(--accent);margin:0 0 9px}h1{font-size:36px;line-height:1.15;letter-spacing:-1.5px;margin:0;font-weight:650}.title-note{font-size:14px;line-height:1.7;margin:0;color:var(--ink);text-align:right}.title-note span{color:var(--muted);font-size:12px}.workspace{display:grid;grid-template-columns:420px minmax(0,1fr);gap:22px;align-items:start}.panel{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:23px;box-shadow:0 3px 10px #233b2c03;min-width:0}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:19px}.section-heading h2{font-size:16px;font-weight:650;display:flex;align-items:center;gap:10px;margin:0}.step{font-size:10px;font-weight:700;color:var(--accent);background:var(--soft);width:24px;height:24px;border-radius:6px;display:inline-flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}.text-button{background:none;border:0;padding:3px;color:var(--muted);font-size:12px}.text-button:hover{color:var(--accent)}.dropzone{position:relative;min-height:145px;border:1px dashed #9db4a7;border-radius:9px;background:#f8fbf8;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:8px;cursor:pointer;text-align:center;padding:15px;transition:background .15s}.dropzone:hover,.dropzone.dragover{background:#edf5ed;border-color:var(--accent)}.dropzone:focus-within{outline:3px solid #d89442;outline-offset:3px}.dropzone input{position:absolute;inset:0;opacity:0;cursor:pointer;width:100%;height:100%}.upload-icon{font-size:22px;line-height:24px;color:var(--accent);border:1px solid var(--line);border-radius:7px;width:34px;height:34px;background:white}.dropzone strong{font-size:13px;font-weight:650}.dropzone strong span{font-weight:400;color:var(--muted)}.dropzone small{font-size:11px;color:var(--muted)}.hint{font-size:11px;line-height:1.6;color:var(--muted);margin:9px 0 0}.layout-heading{margin-top:25px;margin-bottom:15px}.unit-note{font-size:10px;color:var(--muted)}.fields{display:grid;grid-template-columns:1fr 1fr;gap:14px 16px}.fields label,.filename-label{font-size:12px;font-weight:550;display:flex;flex-direction:column;gap:6px}input:not([type=file]),select{width:100%;height:40px;border:1px solid #d9dfd8;background:#fff;padding:8px 11px;color:var(--ink);font-size:13px;min-width:0}input:hover,select:hover{border-color:#9db4a7}input[aria-invalid=true]{border-color:var(--error);background:#fff8f6}details{margin-top:18px;border-top:1px solid var(--line)}summary{cursor:pointer;list-style:none;display:flex;justify-content:space-between;font-size:12px;color:var(--muted);padding-top:14px;gap:8px}summary::-webkit-details-marker{display:none}details[open] summary{color:var(--ink)}details[open] summary>span{color:var(--accent)}.advanced-fields{margin-top:15px}.filename-label{margin-top:14px}.estimate{font-size:12px;color:var(--accent);background:var(--soft);border-radius:7px;padding:11px 12px;margin:20px 0 12px;line-height:1.5;font-variant-numeric:tabular-nums}.primary,.secondary{min-height:42px;padding:10px 16px;font-size:12px;font-weight:650;border:1px solid transparent;display:inline-flex;align-items:center;justify-content:center;gap:16px}.primary{background:var(--accent);color:white}.primary:not(:disabled):hover{background:var(--accent-dark)}.secondary{background:#fff;border-color:var(--line);color:var(--ink)}.secondary:not(:disabled):hover{background:var(--soft);border-color:#a8bbaf}.generate{width:100%;justify-content:space-between;font-size:13px;height:46px}.bottom-hint{text-align:center;font-size:10px}.error{font-size:12px;color:var(--error);line-height:1.5;margin:10px 0}.status{font-size:10px;color:var(--muted);background:var(--bg);padding:5px 9px;border-radius:20px;white-space:nowrap}.status.ready{background:var(--soft);color:var(--accent)}.status.stale{background:#fff0d9;color:#8c571b}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}.segmented{display:flex;gap:2px;background:var(--bg);border-radius:7px;padding:3px}.segmented button{border:0;background:none;padding:6px 13px;font-size:11px;color:var(--muted);min-height:30px}.segmented button[aria-pressed=true]{background:white;color:var(--ink);box-shadow:0 1px 4px #00000012}.preview-stage{height:335px;background-color:#fafbf9;background-image:linear-gradient(45deg,#edf0eb 25%,transparent 25%),linear-gradient(-45deg,#edf0eb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#edf0eb 75%),linear-gradient(-45deg,transparent 75%,#edf0eb 75%);background-size:20px 20px;background-position:0 0,0 10px,10px -10px,-10px 0;border:1px solid var(--line);border-radius:9px;display:flex;align-items:center;justify-content:center;padding:24px;overflow:hidden}.empty{text-align:center;background:#fafbf9e8;padding:20px 24px;border-radius:9px}.empty-grid{display:grid;grid-template-columns:20px 20px 20px;gap:5px;width:max-content;margin:0 auto 18px;transform:rotate(-7deg)}.empty-grid i{width:20px;height:20px;border:1px solid #99b3a3;border-radius:4px;background:#edf4ef}.empty-grid i:nth-child(2){background:#b8d0bd}.empty-grid i:nth-child(6){border-color:#c8935e;background:#f5e4ce}.empty h3{font-size:17px;font-weight:550;letter-spacing:-.3px;margin:0 0 8px}.empty p{font-size:12px;line-height:1.8;color:var(--muted);margin:0}canvas{image-rendering:pixelated;object-fit:contain;display:block;max-width:100%;max-height:100%}[hidden]{display:none!important}.metrics{display:grid;grid-template-columns:1.3fr .7fr .8fr 1fr;gap:10px;margin:19px 0 20px}.metrics>div{border-right:1px solid var(--line);padding-right:10px;min-width:0}.metrics>div:last-child{border:0}.metrics dt{font-size:10px;color:var(--muted);margin-bottom:6px}.metrics dd{font-size:13px;font-weight:600;margin:0;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.export-actions{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:9px}.export-actions button{white-space:nowrap;padding-inline:9px}.json-details{margin-top:16px}.json-details summary{font-size:11px}pre{font:11px/1.7 Consolas,monospace;background:var(--bg);padding:16px;border-radius:7px;max-height:260px;overflow:auto;white-space:pre-wrap;overflow-wrap:anywhere}.result-message{font-size:11px;line-height:1.6;color:var(--muted);margin:13px 0 0;min-height:18px}.frames-toolbar{display:flex;justify-content:space-between;gap:8px;font-size:10px;margin:16px 0 7px;color:var(--muted)}#frame-count{font-weight:650;color:var(--ink);white-space:nowrap}.frame-list{list-style:none;padding:0;margin:0;max-height:140px;overflow:auto}.frame-list li{display:flex;align-items:center;gap:9px;border-bottom:1px solid var(--line);padding:8px 0}.frame-thumb{width:34px;height:34px;object-fit:contain;background:var(--bg);image-rendering:pixelated;border-radius:4px}.frame-info{flex:1;min-width:0;font-size:11px}.frame-info strong{display:block;font-weight:550;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.frame-info span{color:var(--muted);font-size:10px}.frame-actions{display:flex;gap:2px}.frame-actions button{background:none;border:1px solid var(--line);width:28px;height:30px;color:var(--muted);font-size:13px}.frame-actions button:hover{background:var(--soft)}.playback{display:flex;gap:9px;align-items:center;margin-top:12px;font-size:11px;color:var(--muted)}.playback input{width:65px;height:34px}.playback button{min-height:34px;padding:5px 13px}.playback span{margin-left:auto}.guide{display:grid;grid-template-columns:1fr 1.6fr;gap:70px;padding:48px 0 42px;border-top:1px solid var(--line);margin-top:38px}.guide-intro h2{font-weight:550;font-size:26px;letter-spacing:-.7px;line-height:1.3;margin:12px 0}.guide p{font-size:12px;line-height:1.8;color:var(--muted);margin:9px 0 0;max-width:420px}.guide-content{display:grid;grid-template-columns:1fr 1fr;gap:27px 34px}.guide-content article>span{font-size:9px;font-weight:650;letter-spacing:1px;color:var(--accent)}.guide-content h3{font-size:14px;font-weight:600;margin:9px 0 0}footer{border-top:1px solid var(--line);padding:24px 0 28px;display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:10px;color:var(--muted)}.footer-brand{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:-.5px}footer a:hover{color:var(--accent)}@media(min-width:1100px){.output-panel{position:sticky;top:20px}}@media(max-width:1050px){.workspace{grid-template-columns:360px minmax(0,1fr);gap:16px}.panel{padding:19px}.export-actions{grid-template-columns:1fr 1fr}.export-actions .primary{grid-column:1/-1}.metrics{grid-template-columns:1fr 1fr;row-gap:15px}.metrics>div:nth-child(2){border:0}.guide{gap:35px}.preview-stage{height:350px}}@media(max-width:800px){.topbar{height:68px;padding:0 20px}main{padding:0 20px}.workspace{grid-template-columns:1fr}.title-row{padding:24px 0 20px}.title-note{display:none}h1{font-size:31px}.panel{padding:20px}.guide{grid-template-columns:1fr;gap:26px}.guide-intro h2 br{display:none}.guide-content{gap:24px}.preview-stage{height:300px}.metrics{grid-template-columns:1.3fr .7fr .8fr 1fr}.metrics>div:nth-child(2){border-right:1px solid var(--line)}.export-actions{grid-template-columns:1.3fr 1fr 1fr}.export-actions .primary{grid-column:auto}.header-right{gap:16px}.local-badge{font-size:11px}.header-right a{font-size:11px}}@media(max-width:480px){.topbar{padding:0 16px;height:62px}.brand{font-size:21px}.header-right .local-badge{display:none}main{padding:0 14px}.title-row{padding:21px 2px 18px}h1{font-size:29px;letter-spacing:-1px}.eyebrow{font-size:9px}.panel{padding:17px;border-radius:11px}.section-heading h2{font-size:14px}.dropzone{min-height:128px}.fields{gap:13px 12px}.layout-heading{margin-top:22px}.preview-stage{height:275px;padding:14px}.status{font-size:9px;padding:4px 7px}.metrics{grid-template-columns:1fr 1fr;row-gap:15px}.metrics>div:nth-child(2){border:0}.export-actions{grid-template-columns:1fr 1fr}.export-actions .primary{grid-column:1/-1}.guide{padding:32px 3px;margin-top:28px}.guide-content{grid-template-columns:1fr;gap:22px}.guide-intro h2{font-size:24px}footer{flex-wrap:wrap;gap:12px}footer>span:nth-child(2){order:3;width:100%}.frames-toolbar{flex-wrap:wrap}.frame-actions button{width:32px;height:34px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}button,.dropzone{transition:none}button:not(:disabled):active{transform:none}}

/* Review 1: keep the primary action close to the input. */
.topbar{height:72px}.title-row{padding:25px 0 21px}.dropzone{min-height:128px}.frame-list{max-height:102px}.frames-toolbar{font-size:11px}.hint{font-size:12px}.bottom-hint{font-size:11px}.unit-note{font-size:11px}.metrics dt{font-size:11px}.result-message{font-size:12px}.json-details summary{font-size:12px}
@media(max-width:480px){.topbar{height:62px}.title-row{padding:21px 2px 18px}}


/* Review 2: touch targets, readable fields, and narrow preview labels. */
.preview-toolbar .unit-note{max-width:48%;text-align:right;line-height:1.5}.status{line-height:1.4}
@media(max-width:480px){input:not([type=file]),select{font-size:16px;min-height:44px}.primary,.secondary{min-height:44px;font-size:13px}.frame-actions button{width:44px;height:44px}.text-button{min-height:44px;min-width:44px}.segmented button{min-height:44px;padding:8px 12px}summary{min-height:44px;align-items:center;padding-top:8px}.playback input{height:44px}.section-heading{margin-bottom:14px}.status{white-space:normal;max-width:105px;text-align:center}.frames-toolbar{line-height:1.6}.preview-toolbar{gap:8px}.frame-list{max-height:122px}}


/* Static information pages and footer navigation. */
footer nav{display:flex;flex-wrap:wrap;gap:12px 20px;align-items:center}.document-brand{letter-spacing:-.7px;font-size:22px}.document-brand .brand-dot{margin-left:-10px}.back-link{font-size:13px;color:var(--accent)}.document-content{max-width:720px;min-height:55vh;margin:54px auto 64px}.document-content h1{font-size:38px;line-height:1.2;letter-spacing:-1px}.document-content h2{font-size:21px;font-weight:650;line-height:1.4;margin:34px 0 12px}.document-content p{font-size:16px;line-height:1.85;margin:12px 0;color:var(--muted)}.document-content .document-lead{font-size:19px;line-height:1.7;margin:24px 0 32px;color:var(--ink)}.inline-link{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.document-content .eyebrow{font-size:11px;color:var(--accent);margin-bottom:12px}.contact-email{font-size:22px;overflow-wrap:anywhere}
@media(max-width:600px){footer{align-items:flex-start}footer nav{width:100%;gap:4px 20px}footer nav a{min-height:44px;display:inline-flex;align-items:center;font-size:13px}.document-content{margin:32px 4px 44px}.document-content h1{font-size:30px}.document-content p{font-size:16px}.document-content .document-lead{font-size:18px}.document-brand{font-size:19px}.back-link{font-size:11px}}