:root{color-scheme:light;--base:#ffffff;--panel:#ffffff;--raised:#f3f6f8;--line:#d7e0e5;--text:#172b34;--muted:#53656e;--mint:#087f68;--amber:#946200;--red:#b42318;--hover:#edf6f3;--selected:#e9f5f0;--control-line:#a9bac4;--body:"Microsoft YaHei UI","PingFang SC",sans-serif;--mono:"Cascadia Mono",Consolas,monospace}*{box-sizing:border-box}body{margin:0;background:var(--base);color:var(--text);font:13px/1.6 var(--body)}button,input,textarea,select{font:inherit}button{cursor:pointer;border:1px solid var(--line);border-radius:5px;background:var(--raised);color:var(--text);padding:7px 11px;white-space:nowrap}button:hover{border-color:var(--mint);background:var(--hover)}button:disabled{opacity:.4;cursor:wait}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--mint);outline-offset:2px}.primary{background:var(--mint);color:#ffffff;border-color:var(--mint);font-weight:700}.primary:hover{background:#066b57;color:#ffffff}.quiet{background:transparent}input,textarea,select{width:100%;border:1px solid var(--line);border-radius:4px;background:var(--panel);color:var(--text);padding:7px 9px;min-width:0}input::placeholder,textarea::placeholder{color:#667a85}label{font-size:11px;color:var(--muted);display:block}label input,label select,label textarea{display:block;margin-top:4px}kbd{font:10px var(--mono);opacity:.55;margin-left:5px}header{height:60px;display:flex;gap:16px;align-items:center;border-bottom:1px solid var(--line);padding:0 22px;background:var(--panel)}.brand{display:flex;gap:11px;align-items:center;text-decoration:none;color:var(--text);margin-right:auto}.brand-mark{width:36px;height:40px;border:1px solid var(--mint);display:grid;place-items:center;color:var(--mint);font-size:22px;transform:skew(-5deg)}.brand strong{display:block;font-size:16px;letter-spacing:.04em}.brand small{display:block;color:var(--mint);font:9px var(--mono);letter-spacing:.1em;margin-top:3px}.local{font-size:11px;color:var(--muted)}.local i,.save-note i{display:inline-block;width:6px;height:6px;background:var(--mint);border-radius:50%;margin-right:6px}.shell{display:grid;grid-template-columns:168px minmax(440px,1fr) 260px;min-height:calc(100vh - 60px)}.left{padding:12px 9px 8px;border-right:1px solid var(--line);background:var(--panel);display:flex;flex-direction:column;height:calc(100vh - 60px);position:sticky;top:0;min-height:0}.eyebrow{font:10px var(--mono);color:var(--amber);letter-spacing:.09em;margin-bottom:13px}nav{display:grid;gap:3px;flex-shrink:0;max-height:44vh;overflow:auto}nav button{text-align:left;display:grid;grid-template-columns:22px 1fr;align-items:center;gap:5px;padding:6px 4px;background:transparent;border-color:transparent;white-space:normal}nav button.active{border-color:var(--mint);background:var(--selected)}nav button b{font:12px var(--mono);color:var(--mint)}nav button strong{font-size:11px;display:block}nav button small{font-size:10px;color:var(--muted)}nav .mini-progress{height:2px;background:#e3eaee;display:block;margin-top:4px}nav .mini-progress i{height:100%;background:var(--mint);display:block}.dataset-path{border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:8px 0;margin:10px 0}.dataset-path small,.dataset-path strong,.dataset-path span{display:block}.dataset-path strong{font-size:11px;font-weight:500;margin:3px 0;color:var(--text)}.dataset-path small,.dataset-path span{color:var(--muted);font-size:10px}.queue-head{display:flex;justify-content:space-between;align-items:center;margin:0 0 10px}.queue-head span{color:var(--muted);font:11px var(--mono)}.filters{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin:7px 0}.filters select{font-size:10px;padding:6px 3px}.queue{flex:1;overflow:auto;min-height:100px;margin-top:5px}.queue button{border:0;border-left:2px solid transparent;border-bottom:1px solid #e8edf0;border-radius:0;background:transparent;width:100%;text-align:left;display:flex;align-items:center;gap:7px;padding:9px 4px}.queue button.active{background:var(--selected);border-left-color:var(--mint)}.queue button span:first-child{width:7px;height:7px;flex-shrink:0;border:1px solid #70858f;border-radius:50%}.queue button[data-status=reviewed] span:first-child{background:var(--mint);border-color:var(--mint)}.queue button[data-status=draft] span:first-child{background:var(--amber);border-color:var(--amber)}.queue button[data-status=skipped] span:first-child{background:#7c8d96}.queue button strong{display:block;font:11px var(--mono)}.queue button small{display:block;font-size:10px;color:var(--muted)}.queue button em{font-style:normal;font-size:9px;color:var(--mint);margin-left:auto}.pagination{display:flex;align-items:center;justify-content:space-between;margin-top:7px}.pagination button{padding:2px 10px}.pagination span{font:10px var(--mono);color:var(--muted)}main{padding:14px 12px 10px;min-width:0}.workspace-heading{display:flex;justify-content:space-between;align-items:center;gap:20px}.workspace-heading .eyebrow{font-size:9px;margin:0 0 3px;color:var(--muted)}h1{font-size:23px;letter-spacing:.04em;line-height:1.5;margin:0}.progress-block{width:180px;flex-shrink:0;font:10px var(--mono);text-align:right;color:var(--muted)}.progress{height:4px;background:#e3eaee;margin-top:8px}.progress i{display:block;height:100%;background:var(--mint);transition:width .2s}.hint{font-size:11px;line-height:1.7;color:var(--muted);margin:6px 0 10px;min-height:0}.image-heading{display:flex;justify-content:space-between;align-items:center;gap:10px;padding:10px 12px;background:var(--panel);border:1px solid var(--line);border-bottom:0}.image-heading strong{font:11px var(--mono);display:block}.image-heading #imageMeta{display:block;color:var(--muted);font-size:10px;margin-top:4px}#saveState{font-size:10px;color:var(--mint);white-space:nowrap}#saveState.dirty{color:var(--amber)}.warning{font-size:11px;padding:8px 12px;background:#fff8e8;color:#805500;border:1px solid #dec38b}.warning[hidden]{display:none}.toolbar{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;border:1px solid var(--line);padding:7px;background:var(--raised)}.tool-group{display:flex;align-items:center;gap:4px}.toolbar button{padding:5px 7px;font-size:11px;border-color:transparent;background:transparent}.toolbar button.active{color:var(--mint);border-color:var(--mint);background:var(--selected)}.toolbar #zoom{font:10px var(--mono);min-width:36px;text-align:center;color:var(--muted)}.stage{height:clamp(420px,calc(100dvh - 300px),1100px);position:relative;overflow:hidden;border:1px solid var(--line);border-top:0;background-color:#ffffff;background-image:linear-gradient(45deg,#f1f4f6 25%,transparent 25%),linear-gradient(-45deg,#f1f4f6 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#f1f4f6 75%),linear-gradient(-45deg,transparent 75%,#f1f4f6 75%);background-size:22px 22px;background-position:0 0,0 11px,11px -11px,-11px 0}canvas{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair;outline:none}.stage-tip{position:absolute;bottom:8px;left:9px;background:#fffffff0;padding:3px 8px;color:var(--muted);font-size:10px;pointer-events:none}.loading{position:absolute;inset:0;display:grid;place-items:center;background:#fffffff0;color:var(--mint);font:12px var(--mono)}.loading[hidden]{display:none}.filmstrip{display:flex;gap:7px;overflow:auto;padding:10px 0}.filmstrip button{min-width:98px;max-width:120px;padding:0;overflow:hidden;flex:1;background:var(--raised)}.filmstrip img{width:100%;height:53px;object-fit:contain;display:block}.filmstrip small{display:block;font:9px var(--mono);color:var(--muted);padding:3px}.filmstrip button.active{border-color:var(--mint)}.actions{display:flex;justify-content:space-between;gap:8px;flex-wrap:wrap;margin:4px 0 12px}.actions>div{display:flex;gap:6px;align-items:center}.actions button{font-size:11px}.actions #position{font:10px var(--mono);color:var(--muted);padding-left:4px}.evidence{border-top:1px solid var(--line);font-size:11px;color:var(--muted);padding-top:10px}summary{cursor:pointer;color:var(--text);font-size:12px}.evidence p{margin:7px 0}.evidence small{font-size:10px}.right{padding:20px 14px;border-left:1px solid var(--line);background:var(--panel);max-height:calc(100vh - 60px);overflow:auto;position:sticky;top:0}.panel-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.panel-heading strong{font-size:13px}.panel-heading span{font:10px var(--mono);color:var(--muted)}#classSearch{font-size:11px;margin-bottom:9px}.classes{max-height:32vh;overflow:auto;padding-right:3px}.class-group{font-size:9px;color:var(--muted);margin:10px 0 4px;letter-spacing:.06em}.class-btn{width:100%;display:flex;align-items:center;gap:8px;text-align:left;border-color:transparent;background:transparent;padding:6px;font-size:11px}.class-btn i{width:9px;height:9px;border-radius:2px;flex-shrink:0}.class-btn span{margin-left:auto;color:var(--muted);font:9px var(--mono)}.class-btn.active{background:var(--selected);border-color:var(--mint)}.inspector{border-top:1px solid var(--line);padding-top:15px;margin-top:16px}.objects{max-height:135px;overflow:auto}.object-row{display:flex;align-items:center;gap:6px;margin-bottom:4px}.object-row button:first-child{flex:1;text-align:left;font-size:10px;padding:5px 7px;white-space:normal}.object-row button.active{border-color:var(--mint)}.object-row .remove{padding:4px 7px}.inspector label{margin-top:10px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:8px}.check{display:flex;gap:7px;align-items:flex-start;line-height:1.6}.check input{width:auto;flex-shrink:0;margin:3px 0 0;accent-color:var(--mint)}.check[hidden]{display:none}.events{border-top:1px solid var(--line);padding-top:13px;margin-top:16px}.events p{font-size:10px;color:var(--muted)}.events summary span{margin-left:5px;color:var(--mint)}.events label{margin-top:8px}.events button{font-size:11px;margin-top:8px}#eventList>div{font-size:10px;color:var(--muted);border-bottom:1px solid var(--line);padding:5px 0}#eventList button{padding:0 5px;margin:0 0 0 7px}.save-note{font-size:10px;color:var(--muted);line-height:1.8;margin-top:20px;border-top:1px solid var(--line);padding-top:12px}dialog{width:min(850px,94vw);padding:24px;background:var(--raised);border:1px solid var(--line);border-radius:10px;color:var(--text);max-height:90vh;overflow:auto}dialog::backdrop{background:#172b3459;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:16px}h2{font-size:20px;margin:0}h3{font-size:13px;color:var(--mint)}.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px 24px}.help-grid p{font-size:12px;color:var(--muted)}.path-note{padding:12px;background:#f7f9fb;color:var(--amber);font-size:11px}video{display:block;width:100%;max-height:65vh;background:black}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);max-width:85vw;background:#f0faf5;border:1px solid #78a995;padding:12px 20px;border-radius:6px;box-shadow:0 12px 40px #172b3420;z-index:30;font-size:13px}#toast.error{background:#fff2ef;border-color:#d69b8e}#toast[hidden]{display:none}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-thumb{background:#b7c6ce;border-radius:4px}@media(min-width:1800px){.shell{grid-template-columns:176px minmax(600px,1fr) 280px}main{padding:16px}.stage{height:clamp(500px,calc(100dvh - 300px),1200px)}}@media(max-width:1150px){.shell{grid-template-columns:154px minmax(400px,1fr) 236px}.left{padding:16px 9px}.right{padding:16px 10px}main{padding:16px 12px}.local{display:none}.toolbar kbd{display:none}.toolbar button{padding:4px}.toolbar button span{font-size:10px}.actions kbd{display:none}.progress-block{width:130px}h1{font-size:21px} .stage{height:clamp(400px,calc(100dvh - 280px),900px)}}@media(max-width:880px){header{padding:10px 12px;height:auto;min-height:70px;flex-wrap:wrap;gap:8px}.brand{width:100%}.shell{grid-template-columns:150px minmax(0,1fr)}.right{grid-column:1/-1;position:static;max-height:none;display:grid;grid-template-columns:1fr 1fr;gap:14px}.right>.panel-heading,.right>#classSearch{grid-column:1}.classes{grid-column:1;grid-row:3/6;max-height:500px}.inspector{grid-column:2;grid-row:1/6;margin:0;border:0;padding:0}.events,.save-note{grid-column:1/-1}.left{min-height:600px;height:calc(100vh - 100px)}.stage{height:440px}.progress-block{display:none}.help-grid{grid-template-columns:1fr}.actions{display:block}.actions>div{margin:7px 0;flex-wrap:wrap}}@media(prefers-reduced-motion:reduce){*{transition:none!important}}

/* White workspace: clear control boundaries and readable keyboard focus. */
input,textarea,select{border-color:var(--control-line)}.stage-tip{border:1px solid var(--line);border-radius:4px}dialog{background:var(--panel);box-shadow:0 20px 70px #172b3426}button:disabled{opacity:.55}#toast.error{color:var(--red)}

/* Compact navigation leaves more width and height for the annotation canvas. */
.dataset-path strong{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;overflow-wrap:anywhere}.queue button>span:last-child{min-width:0;flex:1}.queue button strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.left #search{font-size:11px}.left>.eyebrow{font-size:9px;margin-bottom:8px}.filmstrip{padding:7px 0}.filmstrip img{height:44px}

.preannotation-banner{font-size:11px;line-height:1.65;padding:7px 12px;background:#eff6ff;color:#244e78;border:1px solid #a9c8e8;border-bottom:0}.preannotation-banner[hidden]{display:none}.queue button[data-status=suggested] span:first-child{background:#356fa5;border-color:#356fa5}

.color-suggestion{margin:10px 0;padding:8px;border:1px solid #a9c8e8;background:#eff6ff;color:#244e78;font-size:11px;line-height:1.6}.color-suggestion[hidden]{display:none}.color-suggestion button{display:block;font-size:11px;padding:4px 7px;margin-top:6px}.color-suggestion button[hidden]{display:none}

/* Import tools keep the white annotation workspace and expose data provenance. */
.status-summary{display:flex;gap:7px;flex-wrap:wrap;margin:8px 0 12px}.status-card{display:flex;gap:7px;align-items:center;border:1px solid var(--line);border-radius:5px;background:#fff;padding:5px 11px;text-align:left;font-size:11px}.status-card strong{font:600 16px var(--mono)}.status-card span{color:var(--muted)}.status-suggested{border-left:3px solid #438bd2}.status-draft{border-left:3px solid #e9a63b}.status-reviewed{border-left:3px solid var(--mint)}.status-pending{border-left:3px solid #a2b1b9}.status-skipped{border-left:3px solid #7c8d96}.manage-dialog{width:min(1020px,95vw);padding:24px}.dialog-intro{font-size:12px;color:var(--muted);margin:7px 0 0}.manage-tabs{display:flex;gap:7px;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:20px}.manage-tabs button{background:transparent}.manage-tabs .active{background:var(--selected);border-color:var(--mint);color:var(--mint)}.manage-panel[hidden]{display:none}.manage-panel label{font-size:12px;margin:12px 0 6px}.manage-panel label:first-child{margin-top:0}.import-layout,.manage-columns{display:grid;grid-template-columns:1fr 1fr;gap:24px}.import-explainer{background:#f6faf9;border:1px solid #d9e9e4;border-radius:7px;padding:20px;font-size:12px;line-height:1.8;color:var(--muted)}.import-explainer strong{font-size:16px;color:var(--text)}.import-explainer ol{padding-left:20px}.import-explainer li{margin:5px 0}.field-help{font-size:12px;line-height:1.7;color:var(--muted);white-space:pre-wrap}.text-button{font-size:11px;background:transparent;border:0;color:var(--mint);padding:6px 0}.import-actions{display:flex;gap:10px;margin:18px 0 12px}.import-actions button{font-size:12px}.manage-panel progress{width:100%;height:10px;accent-color:var(--mint)}.storage-list{margin-top:18px;display:grid;gap:9px}.storage-entry{padding:12px 14px;border:1px solid var(--line);border-radius:6px;background:#fff;min-width:0}.storage-entry strong,.storage-entry code,.storage-entry small{display:block}.storage-entry strong{font-size:12px}.storage-entry code{font-size:11px;line-height:1.7;margin:5px 0;color:#245a73;overflow-wrap:anywhere;user-select:all}.storage-entry small{font-size:11px;line-height:1.6;color:var(--muted)}.storage-entry[data-kind=preannotation]{border-left:3px solid #438bd2}.storage-entry[data-kind=annotation]{border-left:3px solid #e9a63b}.storage-entry[data-kind=label]{border-left:3px solid var(--mint)}.storage-root{font-size:12px;overflow-wrap:anywhere;color:var(--muted);margin:13px 0}.manage-card{border:1px solid var(--line);padding:18px;border-radius:7px;min-width:0}.manage-card h3{margin-top:0;font-size:15px}.manage-card button[type=submit]{margin-top:14px}.existing-classes{display:flex;gap:6px;flex-wrap:wrap;max-height:160px;overflow:auto;margin:10px 0}.existing-classes span{font-size:11px;padding:4px 7px;border:1px solid var(--line);border-radius:4px;background:#f7f9fb}.import-results{font-size:12px;line-height:1.8;padding-left:20px;max-height:180px;overflow:auto}.import-results .success{color:#087762}.import-results .failed{color:var(--red)}.import-results .duplicate{color:var(--muted)}#stopImport[hidden]{display:none}.stage{height:clamp(400px,calc(100dvh - 350px),1100px)}
@media(max-width:880px){.import-layout,.manage-columns{grid-template-columns:1fr}.manage-dialog{padding:16px}.manage-tabs{gap:4px}.manage-tabs button{font-size:11px;padding:7px}.status-card{padding:4px 7px}.status-card strong{font-size:14px}header button{font-size:11px}.stage{height:440px}}