:root{--bg:#f3f4f8;--surface:#fff;--ink:#242738;--muted:#71758a;--line:#e5e7ef;--accent:#6355d9;--light:#eeebff;--green:#227562;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:default}button,input,select,summary,a{outline-offset:4px}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--accent)}.topbar{height:84px;padding:0 5%;background:var(--surface);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}.brand strong{font-size:24px;letter-spacing:3px}.brand-mark{width:36px;height:36px;border-radius:10px;background:var(--accent);color:white;font-size:27px;text-align:center;line-height:34px}.brand-sub{font-size:12px;color:var(--muted);margin-left:14px}.header-right{display:flex;align-items:center;gap:22px;font-size:12px}.privacy{color:var(--green)}.dot{display:inline-block;background:var(--green);width:6px;height:6px;border-radius:50%;margin-right:6px}.version{color:var(--muted);border:1px solid var(--line);padding:7px 10px;border-radius:6px}main{max-width:1440px;margin:0 auto;padding:42px 5% 24px}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:32px}.eyebrow{font-family:Consolas,"Microsoft YaHei",sans-serif;font-size:11px;letter-spacing:2px;color:var(--muted);margin:0 0 12px}h1{font-size:36px;font-weight:700;letter-spacing:-1px;margin:0 0 14px}h1 span{color:var(--accent)}.lead{color:var(--muted);font-size:14px;line-height:1.8;margin:0}.button{border:0;padding:13px 18px;border-radius:9px;font-weight:600;font-size:13px;display:inline-flex;align-items:center;justify-content:center;gap:22px}.secondary{background:white;border:1px solid var(--line);color:var(--ink)}.primary{background:var(--accent);color:white}.button:hover:not(:disabled){filter:brightness(.96)}.workspace{display:grid;grid-template-columns:320px minmax(0,1fr);gap:28px;align-items:start}.controls{border-radius:14px;background:var(--surface);border:1px solid var(--line);overflow:hidden}.control-section{padding:23px;border-bottom:1px solid var(--line)}.control-section:last-child{border:0}.section-title{display:flex;align-items:center;gap:9px;margin-bottom:18px}.section-title h2{font-size:14px;margin:0}.step{width:22px;height:22px;background:var(--light);color:var(--accent);font-family:Consolas,monospace;font-size:12px;display:grid;place-items:center;border-radius:6px}.small-badge{font-size:10px;color:var(--muted);margin-left:auto}.upload-zone{border:1px dashed #c7c8db;border-radius:10px;display:flex;position:relative;flex-direction:column;align-items:center;justify-content:center;gap:9px;padding:21px 8px;background:#fafaff;cursor:pointer}.upload-zone:hover,.upload-zone.dragging{border-color:var(--accent);background:var(--light)}.upload-zone:focus-within{outline:3px solid var(--accent)}.upload-zone strong{font-size:12px}.upload-zone>span:last-of-type{font-size:10px;color:var(--muted)}.upload-icon{color:var(--accent);font-size:29px}.upload-zone input{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.import-options{margin-top:13px}.import-options label{font-size:11px;color:var(--muted)}.import-options select{margin-top:6px;font-size:11px;padding:8px}.inline-actions{display:flex;justify-content:space-between;margin-top:14px}.text-button{padding:4px 0;border:0;background:none;color:var(--accent);font-size:12px;font-weight:600}.help{font-size:11px;color:var(--muted);line-height:1.8;margin:10px 0 0;overflow-wrap:anywhere}details{margin-top:12px;font-size:11px;color:var(--muted)}summary{cursor:pointer}details p{line-height:1.9}.error-box{background:#fff1ef;color:#a33128;border:1px solid #f5d0c9;border-radius:7px;padding:10px;font-size:12px;line-height:1.8;white-space:pre-wrap;overflow-wrap:anywhere;margin-top:12px}.theme-options{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.theme-option{border:1px solid var(--line);background:white;padding:7px 6px;border-radius:8px;display:flex;flex-direction:column;gap:8px;align-items:center;font-size:10px}.theme-option.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.swatch{height:38px;width:100%;border-radius:4px;position:relative;overflow:hidden}.swatch:after{content:"";height:3px;width:22px;position:absolute;left:8px;top:12px;background:currentColor;box-shadow:0 7px 0 currentColor;opacity:.65}.ink{background:#18243e;color:#adbdf7}.paper{background:#f0f2f7;color:#556277}.mint{background:#e4f3eb;color:#286b53}.field-label{display:block;font-size:11px;font-weight:600;margin:18px 0 8px}input:not([type=file]),select{width:100%;border:1px solid var(--line);padding:10px 11px;background:#fff;border-radius:7px;font-size:12px;color:var(--ink)}.export-section .primary{width:100%}.export-status{font-size:11px;line-height:1.7;color:var(--green);margin:9px 0 0;min-height:0}.preview-area{min-width:0}.preview-toolbar{display:flex;align-items:center;justify-content:space-between;margin:3px 0 17px;gap:12px}.preview-toolbar .eyebrow{font-size:9px;letter-spacing:2px;margin-bottom:7px}.preview-toolbar h2{font-size:17px;font-weight:600;margin:0}.dimension-badge{font:11px Consolas,monospace;color:var(--muted);white-space:nowrap}.preview-stage{background:#e7e9f1;border:1px solid #dedfeb;border-radius:14px;min-height:410px;display:flex;align-items:center;justify-content:center;padding:30px;background-image:radial-gradient(#cfd3df .6px,transparent .6px);background-size:12px 12px}canvas#preview{max-width:100%;max-height:570px;width:auto;height:auto;box-shadow:0 16px 40px #222e4d21;border-radius:2px}canvas[hidden]{display:none!important}.empty-state{text-align:center}.empty-state>span{font-size:49px;color:#b0b5c9}.empty-state h3{font-size:20px;margin:16px 0 10px}.empty-state p{font-size:13px;color:var(--muted);margin-bottom:20px}.preview-footer{display:flex;align-items:center;justify-content:space-between;margin:15px 0 26px}.pager{display:flex;align-items:center;gap:16px;font:12px Consolas,monospace;color:var(--muted)}.icon-button{width:31px;height:31px;background:white;border:1px solid var(--line);border-radius:7px}.cards-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.cards-heading h3{font-size:13px;margin:0}.cards-heading span{font-size:11px;color:var(--muted)}.thumbnails{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.thumbnail{padding:7px;border:1px solid var(--line);border-radius:8px;background:#fff;text-align:left;min-width:0}.thumbnail.selected{border-color:var(--accent);box-shadow:0 0 0 1px var(--accent)}.thumbnail canvas{width:100%;display:block;aspect-ratio:16/9;object-fit:contain;background:#f1f2f6}.thumbnail span{display:block;font-size:10px;color:var(--muted);padding:7px 2px 1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.data-details{background:white;padding:15px;border-radius:10px;border:1px solid var(--line);margin-top:20px}.data-details summary{font-size:12px;font-weight:600;color:var(--ink)}.data-details summary span{font-weight:400;color:var(--muted);margin-left:8px}.table-scroll{overflow:auto;margin-top:12px;max-height:300px}table{border-collapse:collapse;width:100%;white-space:nowrap;font-size:11px}td,th{text-align:left;padding:9px 10px;border-bottom:1px solid var(--line);max-width:210px;overflow:hidden;text-overflow:ellipsis}th{color:var(--muted);font-weight:500}footer{display:flex;justify-content:space-between;font-size:10px;color:#9599ab;margin-top:28px;letter-spacing:1px}@media(min-width:1500px){main{padding-left:45px;padding-right:45px}}@media(max-width:1000px){.workspace{grid-template-columns:280px minmax(0,1fr);gap:18px}.control-section{padding:18px}.preview-stage{padding:18px;min-height:330px}.thumbnails{grid-template-columns:repeat(3,minmax(0,1fr))}.brand-sub{display:none}}@media(max-width:760px){.topbar{height:65px}.version{display:none}.header-right{font-size:10px}.brand strong{font-size:20px}main{padding-top:26px}.intro{align-items:flex-start;gap:16px;flex-direction:column}h1{font-size:29px}.lead{font-size:12px}.workspace{grid-template-columns:1fr}.controls{display:block}.preview-stage{min-height:260px;padding:14px}.preview-toolbar h2{font-size:14px}.thumbnails{grid-template-columns:repeat(3,minmax(0,1fr))}footer{gap:10px;font-size:9px}.theme-options .swatch{height:50px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Weekly validation page: readable controls and opt-in feedback. */
.lead{font-size:16px}.button,.text-button,.section-title h2,.upload-zone strong,.field-label,input:not([type=file]),select,.import-options label,.import-options select,.theme-option,.help,details,.data-details summary,.export-status,.thumbnail span,table,.small-badge,.cards-heading span{font-size:14px}.upload-zone>span:last-of-type{font-size:12px}.validation{margin-top:32px;padding:24px;background:white;border:1px solid var(--line);border-radius:12px;display:grid;grid-template-columns:1fr 1fr;gap:24px;font-size:14px;line-height:1.8}.validation h2{font-size:19px;margin:0}.validation p{color:var(--muted)}.validation input[type=checkbox]{width:auto;min-width:18px;height:18px;vertical-align:middle}.validation a{display:block;color:var(--accent);margin-top:8px}.validation button{margin-top:12px}.policy{max-width:800px;font-size:16px;line-height:1.9}.policy h1{margin-top:24px}.policy h2{font-size:22px}@media(max-width:760px){.validation{grid-template-columns:1fr}.lead{font-size:16px}}

.mapping-panel{padding:16px;border:1px solid #ccd7e4;border-radius:12px;margin:12px 0}.mapping-fields{display:grid;grid-template-columns:1fr 1fr;gap:10px}.mapping-fields label{font-size:13px;min-width:0}.mapping-fields select{width:100%;margin-top:6px}.mapping-panel[hidden]{display:none}.tutorial{max-width:900px;margin:40px auto;padding:20px}.tutorial section{margin:32px 0;padding:24px;border:1px solid #d5dce5;border-radius:16px}.tutorial pre{white-space:pre-wrap;overflow-wrap:anywhere}