:root{--ink:#172e35;--muted:#687e82;--teal:#087e83;--mint:#dff3ee;--paper:#f4f7f4;--white:#fff;--line:#dce7e3;--gold:#d68b39;--red:#c85e51;--shadow:0 12px 34px #163a3512}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.45 Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif}button,input{font:inherit}button{cursor:pointer}.shell{max-width:1180px;margin:auto;padding:24px 28px 40px}.top{display:flex;align-items:center;justify-content:space-between;margin-bottom:25px}.brand{display:flex;align-items:center;gap:12px;font-weight:750;letter-spacing:-.03em;font-size:20px}.logo{width:38px;height:38px;border-radius:12px;background:var(--teal);display:grid;place-items:center;color:#fff;font-size:19px}.topright{display:flex;gap:10px;align-items:center;color:var(--muted);font-size:13px}.badge{background:#e6efeb;border-radius:99px;padding:7px 11px;color:#37605a;font-weight:650}.intro{margin-bottom:22px}.eyebrow{text-transform:uppercase;font-size:11px;letter-spacing:.14em;color:var(--teal);font-weight:750}.intro h1{font-size:30px;line-height:1.15;letter-spacing:-.04em;margin:5px 0 8px}.intro p{margin:0;color:var(--muted);max-width:650px}.jumpLink{display:inline-block;margin-top:12px;text-decoration:none}.layout{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(300px,.85fr);gap:18px}.card{background:var(--white);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow)}.stage{padding:20px}.stagehead{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}.stagehead h2,.controls h2{font-size:16px;margin:0 0 3px;letter-spacing:-.02em}.stagehead p{margin:0;color:var(--muted);font-size:13px}.mode{display:flex;padding:3px;background:#edf3f0;border-radius:10px;gap:2px}.mode button{border:0;background:none;padding:7px 11px;border-radius:8px;color:var(--muted);font-size:12px;font-weight:650}.mode button.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px #193b351c}.scene{position:relative;background:#edf5f1;border-radius:14px;overflow:hidden;min-height:370px;border:1px solid #e1ece7}.scene svg{display:block;width:100%;height:370px}.scene-label{position:absolute;top:13px;left:14px;font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:#55746c;font-weight:700}.viewtag{position:absolute;right:13px;top:12px;background:#ffffffcf;padding:6px 9px;border:1px solid #dce9e3;border-radius:99px;color:#58716b;font-size:11px}.mirror{transition:transform .25s ease}.targetMark{opacity:0;transition:opacity .25s}.targetMark.show{opacity:1}.lens{transition:opacity .3s}.below{display:flex;justify-content:space-between;align-items:center;padding-top:14px;gap:12px}.feedback{font-size:13px;color:var(--muted);display:flex;align-items:center;gap:9px}.dot{width:9px;height:9px;background:#b9c7c2;border-radius:50%}.dot.good{background:#42a886}.dot.close{background:var(--gold)}.btn{border:0;border-radius:10px;background:var(--teal);color:white;padding:10px 15px;font-weight:700;font-size:13px}.btn:hover{background:#066e72}.btn.secondary{background:#edf4f1;color:#315d57}.btn.secondary:hover{background:#dcece6}.side{display:flex;flex-direction:column;gap:16px}.controls{padding:20px}.tasktype{font-size:11px;text-transform:uppercase;letter-spacing:.12em;color:var(--teal);font-weight:750;margin:13px 0 5px}.tasktitle{font-size:22px;letter-spacing:-.04em;font-weight:750;margin:0 0 5px}.taskdesc{color:var(--muted);font-size:13px;margin:0 0 18px}.control{margin:17px 0}.controlhead{display:flex;justify-content:space-between;font-size:13px;font-weight:650;margin-bottom:8px}.val{color:var(--teal);font-variant-numeric:tabular-nums}input[type=range]{width:100%;accent-color:var(--teal)}.ends{display:flex;justify-content:space-between;color:#8a9c98;font-size:10px;margin-top:1px}.tips{border-top:1px solid var(--line);padding-top:15px;margin-top:16px}.tips h3{font-size:12px;margin:0 0 6px}.tips p{font-size:12px;color:var(--muted);margin:0}.stats{padding:17px 20px}.statsrow{display:flex;justify-content:space-between;align-items:center}.statsrow strong{font-size:14px}.statsnum{font-weight:750;font-variant-numeric:tabular-nums}.progress{height:6px;border-radius:99px;background:#edf2ef;margin:12px 0 8px;overflow:hidden}.progress span{display:block;width:0;height:100%;background:#47a787;border-radius:99px;transition:width .3s}.subtle{font-size:11px;color:var(--muted)}.hintline{margin-top:12px;display:flex;gap:8px}.hintline button{border:0;background:none;color:var(--teal);font-weight:700;padding:0;font-size:12px}.hint{display:none;margin-top:8px;padding:10px;background:#f4f8f5;border-radius:9px;font-size:12px;color:#536c66}.hint.show{display:block}.drill{margin-top:18px;padding:20px}.drillhead{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:16px}.drillhead h2{margin:3px 0;font-size:20px;letter-spacing:-.03em}.drillhead p{margin:0;color:var(--muted);font-size:13px}.drillgrid{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:14px;align-items:start}.operatorview{display:none}.pathModes{display:flex;gap:7px;margin:-2px 0 10px}.pathModes button{border:1px solid var(--line);background:#fff;color:var(--muted);border-radius:8px;padding:6px 10px;font-size:11px;font-weight:700}.pathModes button.active{background:var(--mint);border-color:#a9d4c6;color:#176e69}.axisControl{margin:0 0 10px;padding:9px 10px;background:#f4f8f5;border-radius:10px}.axisControl label{display:flex;justify-content:space-between;gap:8px;font-size:11px;font-weight:750;color:#315d57}.axisControl input{width:100%;margin:5px 0 0;accent-color:var(--teal)}.axisControl small{display:block;color:var(--muted);font-size:10px}.drillview,.directview,.operatorview{border:1px solid var(--line);border-radius:14px;padding:12px;background:#fbfdfb}.panelcap{display:flex;justify-content:space-between;align-items:center;font-size:11px;text-transform:uppercase;letter-spacing:.07em;color:#52716a;font-weight:750;margin:0 2px 9px}.tinybadge{background:#e7f1ed;border-radius:99px;padding:5px 8px;letter-spacing:0;text-transform:none}.drillview svg{display:block;width:100%;touch-action:none;cursor:crosshair}.directview svg{display:block;width:100%;cursor:default}.drillview #toothResult{cursor:default}.drillhint{font-size:12px;color:var(--muted);padding:8px 2px 0}.operatorview p{font-size:11px;color:var(--muted);margin:8px 2px 0}.foot{color:#869994;font-size:11px;margin:18px 3px 0}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:#173d3c;color:white;padding:11px 16px;border-radius:11px;font-size:13px;transition:.25s}.toast.on{opacity:1;transform:translate(-50%,0)}@media(max-width:900px){.drillgrid{grid-template-columns:1fr}}@media(max-width:800px){.drillgrid{grid-template-columns:1fr}.shell{padding:16px}.layout{grid-template-columns:1fr}.scene,.scene svg{min-height:300px;height:300px}.stagehead{gap:12px;flex-direction:column}.intro h1{font-size:26px}.topright .badge{display:none}}



/* Tooth drawing studio */
.drawingLayout{align-items:start}.studio{padding:20px}.studioHead{display:flex;justify-content:space-between;align-items:flex-start;gap:14px}.studioHead h2{font-size:20px;margin:3px 0;letter-spacing:-.03em}.studioHead p{margin:0 0 14px;color:var(--muted);font-size:13px;max-width:640px}.pickerRow{display:flex;flex-direction:column;gap:12px;margin:6px 0 14px}.pickerGroup{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.pickerLabel{min-width:44px;color:#58716b;font-size:11px;text-transform:uppercase;letter-spacing:.08em;font-weight:750}.toothPicker,.viewPicker{display:flex;gap:5px;flex-wrap:wrap;padding:3px;background:#edf3f0;border-radius:10px}.toothPicker button,.viewPicker button{border:0;background:transparent;border-radius:8px;padding:7px 11px;color:var(--muted);font-size:12px;font-weight:650}.toothPicker button.active,.viewPicker button.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px #193b351c}.canvasFrame{position:relative;overflow:hidden;border:1px solid #e1e8df;border-radius:14px;background:#fbf8f0}.canvasTag{position:absolute;left:14px;top:12px;z-index:1;border:1px solid #e4e7db;border-radius:99px;padding:6px 10px;background:#ffffffdd;color:#55716a;font-size:11px;font-weight:750;text-transform:uppercase;letter-spacing:.06em;pointer-events:none}.canvasFrame canvas{display:block;width:100%;height:auto;aspect-ratio:900/520;touch-action:none;cursor:crosshair}.canvasHint{position:absolute;right:12px;bottom:10px;color:#7d8c83;font-size:10px;pointer-events:none}.drawToolbar{display:flex;align-items:center;justify-content:flex-end;gap:8px;flex-wrap:wrap;margin-top:12px}.studioAside{display:flex;flex-direction:column;gap:14px}.lessonCard,.courseCard{padding:19px}.lessonProgress{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#71857d;font-size:10px;font-weight:800;letter-spacing:.09em}.miniProgress{height:5px;width:96px;border-radius:99px;background:#edf2ee;overflow:hidden}.miniProgress span{display:block;width:25%;height:100%;background:#48a787;transition:width .2s}.lessonCard h2{font-size:21px;line-height:1.2;letter-spacing:-.035em;margin:2px 0 8px}.lessonCard>p{color:var(--muted);font-size:13px;margin:0}.anatomyNote{margin-top:16px;padding:13px;background:#f3f8f5;border:1px solid #e4efe8;border-radius:11px}.anatomyNote strong{font-size:11px;color:#28675d}.anatomyNote p{font-size:12px;color:#5e7770;margin:5px 0 0}.lessonActions{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:15px}.textBtn{border:0;background:transparent;color:var(--teal);font-size:12px;font-weight:750;padding:4px 0}.lessonActions span{font-size:9px;color:#8a9a94;text-align:right}.courseCard h3{font-size:15px;margin:5px 0 10px}.stepList{list-style:none;padding:0;margin:0;display:grid;gap:7px}.stepList li{display:flex;align-items:center;gap:9px;padding:7px 9px;border-radius:9px;color:#778882;font-size:12px}.stepList li span{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#edf2ef;font-size:10px;font-weight:750}.stepList li.current{background:#eff8f4;color:#176e69;font-weight:750}.stepList li.current span{background:#d9f0e6;color:#176e69}.stepList li.done span{background:#45a383;color:#fff}.smallNote{font-size:11px;color:var(--muted);margin:10px 0 0;line-height:1.5}.drill{margin-top:20px}.drillhead h2{font-size:19px}
@media(max-width:800px){.drawingLayout{grid-template-columns:1fr}.studioHead{align-items:flex-start}.studio{padding:15px}.drawToolbar{justify-content:flex-start}.pickerGroup{align-items:flex-start;flex-direction:column;gap:6px}.canvasHint{font-size:9px}}
.archPicker{display:flex;gap:5px;flex-wrap:wrap;padding:3px;background:#edf3f0;border-radius:10px}
.archPicker button{border:0;background:transparent;border-radius:8px;padding:7px 11px;color:var(--muted);font-size:12px;font-weight:650}
.archPicker button.active{background:#fff;color:var(--ink);box-shadow:0 1px 3px #193b351c}
.drawToolbar button:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}

.morphologyRow{display:flex;gap:12px;align-items:center;margin:12px 0 16px;padding:10px 13px;background:#f0f6f2;border:1px solid #dae7df;border-radius:10px;font-size:12px;color:#365b50}
.morphologyRow label{font-weight:700}.morphologyRow select{max-width:100%;padding:7px 10px;border:1px solid #b9cec3;border-radius:7px;background:white;color:#365b50;font:inherit}
.anatomySources{margin-top:16px;font-size:12px;color:#5e7770}.anatomySources summary{cursor:pointer;font-weight:700}.anatomySources a{display:block;margin:8px 0;color:#176e69}.anatomySources p{line-height:1.5}
[hidden]{display:none!important}

.bookSource{font-size:12px;line-height:1.6;color:#61756f;margin:12px 0 0}

/* Drawing workspace */
.shell{max-width:1640px}.intro{margin-bottom:18px}.intro h1{font-size:25px}.drawingLayout{grid-template-columns:minmax(0,1fr) 265px}.drawingLayout.cueCollapsed{grid-template-columns:1fr}.drawingLayout.cueCollapsed .studioAside{display:none}.studio{min-width:0}.pickerRow{display:grid;grid-template-columns:1fr 1fr;gap:10px}.pickerGroup:nth-child(3),.pickerGroup:nth-child(4){grid-column:1/-1}.morphologyRow{display:inline-flex;margin:4px 8px 12px 0}.workspaceModes,.workspaceTools,.comparisonBar{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.workspaceModes{border-top:1px solid var(--line);padding:14px 0}.workspaceModes button,.workspaceTools button,.comparisonBar button{border:1px solid #cfddd5;background:#fff;border-radius:8px;padding:9px 12px;color:#315d57;font:600 12px system-ui;min-height:38px}.workspaceModes button.active,.workspaceTools button.active,.comparisonBar button[aria-pressed="true"]{background:#176e69;color:white;border-color:#176e69}.workspaceModes span{font-size:12px;color:#61776e;flex:1;min-width:170px}.workspaceTools{background:#f0f5f1;border:1px solid #dce7df;padding:8px;border-radius:12px;margin-bottom:12px}.workspaceTools label,.comparisonBar label{display:flex;align-items:center;gap:6px;font-size:12px}.workspaceTools input[type=range]{width:75px}.workspaceTools output{min-width:24px;font-size:12px}.workspaceTools button:disabled{opacity:.4;cursor:default}.toolDivider{height:24px;border-left:1px solid #c7d6cc}.drawingWorkspace{display:grid;grid-template-columns:1fr;gap:12px}.drawingWorkspace.copyMode{grid-template-columns:1fr 1fr}.copyReference{border:1px solid #dce5dd;border-radius:14px;background:#fbf8f0;overflow:hidden;align-self:start}.copyReference canvas{width:100%;height:auto;display:block}.referenceCaption{padding:10px 14px;font-size:11px;color:#58716b;background:#f0f5f1}.comparisonBar{padding:12px 0 0}.comparisonBar input[type=range]{width:110px}.comparisonBar span{font-size:11px;color:#63796f}.comparisonBar i{display:inline-block;background:#5379cf;width:8px;height:8px;border-radius:50%}.canvasFrame canvas:focus-visible{outline:3px solid #5da998;outline-offset:-3px}.canvasHint{background:#fbf8f0db;padding:3px;border-radius:4px}.drawToolbar{justify-content:flex-start}.studioAside{position:sticky;top:15px}button:focus-visible{outline:3px solid #80bcae;outline-offset:2px}
@media(max-width:1100px){.drawingLayout{grid-template-columns:1fr}.studioAside{position:static}.drawingWorkspace.copyMode{grid-template-columns:1fr 1.25fr}}
@media(max-width:650px){.shell{padding:10px}.studio{padding:12px}.pickerRow{grid-template-columns:1fr}.pickerGroup{grid-column:1/-1}.drawingWorkspace.copyMode{grid-template-columns:1fr}.copyReference canvas{max-height:240px;object-fit:contain}.workspaceTools{gap:5px}.workspaceModes span{order:2;flex-basis:100%}.canvasTag{max-width:90%;font-size:9px}.topright{display:none}}

/* Personal drawing kit */
.inkControls{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:12px 14px;background:#fff;border:1px solid #dce7df;border-radius:12px}
.inkLabel{font-size:11px;font-weight:750;color:#58716b;text-transform:uppercase;letter-spacing:.06em}
.colorPalette{display:flex;gap:7px;flex-wrap:wrap}.colorSwatch{width:28px;height:28px;border:3px solid white;border-radius:50%;background:var(--swatch);box-shadow:0 0 0 1px #d5dfd9;padding:0}.colorSwatch[aria-pressed="true"]{box-shadow:0 0 0 2px #25343b;position:relative}.colorSwatch[aria-pressed="true"]:after{content:'✓';color:white;font-size:15px;font-weight:bold;text-shadow:0 1px 2px #0009}
.inkControls label{display:flex;align-items:center;gap:7px;font-size:12px;color:#365b50}.inkControls input[type=range]{width:85px}.inkControls input[type=color]{width:30px;height:30px;padding:2px;border:1px solid #c7d6cc;border-radius:7px;background:white;cursor:pointer}.inkControls output{min-width:32px;font-variant-numeric:tabular-nums}.inkControls button#exportDrawing{margin-left:auto;border:0;border-radius:8px;padding:10px 14px;background:#176e69;color:white;font-weight:650}.brushPreview{width:34px;height:34px;display:grid;place-items:center;border:1px solid #dce7df;border-radius:8px;background:#fbf8f0}.brushPreview i{display:block;border-radius:50%}.drawingTip{font-size:11px;color:#6b7e75;margin:8px 2px 12px;max-width:850px}
@media(max-width:650px){.inkControls{gap:12px;padding:10px}.colorSwatch{width:30px;height:30px}.inkControls button#exportDrawing{margin-left:0}.drawingTip{line-height:1.5}}
/* Anatomy sketchbook layout */
:root{--paper:#f3f3ef;--ink:#253b38;--muted:#72807a;--line:#e0e5de;--shadow:0 5px 22px #20382e05}
body{background:var(--paper)}.shell{max-width:1840px;padding:0 28px 24px}.top{min-height:88px;margin-bottom:22px;border-bottom:1px solid #dce2da;gap:24px}.brand{font-size:22px;flex-shrink:0}.logo{border-radius:12px;background:#244e45;width:42px;height:42px}.brandSubtitle{display:block;font-size:9px;letter-spacing:.18em;font-weight:600;color:#809087;margin-top:3px}.selectedToothHeading{font-size:13px;color:#64766c;flex:1;text-align:center}.saveDrawing{border:0;background:#285e50;color:white;padding:12px 19px;border-radius:9px;white-space:nowrap;font-size:13px;font-weight:650}.saveDrawing:hover{background:#1d493e}.saveDrawing span{margin-left:12px}
.drawingLayout{grid-template-columns:minmax(0,1fr) 250px;gap:20px}.studio{padding:24px;border-radius:14px;box-shadow:var(--shadow)}.studioHead{align-items:center;margin-bottom:20px}.studioHead h2{font-size:22px;font-weight:600;letter-spacing:-.04em;margin:5px 0 0}.studioHead .eyebrow{font-size:9px;color:#7b8a80}.studioHead #clearDrawing{background:transparent;border:1px solid var(--line);color:#7b6862;font-weight:500}.pickerRow{display:grid;grid-template-columns:1fr .8fr 1.5fr 1fr;gap:0;border:1px solid var(--line);border-radius:10px;background:#fafbf8;margin:0 0 14px;padding:4px 0}.pickerGroup,.pickerGroup:nth-child(3),.pickerGroup:nth-child(4){grid-column:auto;display:flex;flex-direction:column;align-items:stretch;gap:3px;padding:7px 14px;border-right:1px solid var(--line)}.pickerGroup:last-child{border:0}.pickerLabel{font-size:9px;letter-spacing:.1em;color:#819087}.pickerGroup select{width:100%;min-width:0;border:0;background:transparent;color:#2d493e;font:600 13px system-ui;padding:4px 18px 4px 0;cursor:pointer}.pickerGroup select:focus-visible{outline:2px solid #80bcae;outline-offset:3px}.morphologyRow{font-size:11px;background:#f7f9f5;padding:7px 10px;margin-bottom:10px;border-color:#e5e9e0}.morphologyRow select{padding:5px 7px;font-size:11px}
.workspaceModes{border-top:0;border-bottom:1px solid var(--line);padding:0 0 14px;margin:3px 0 18px;gap:4px}.workspaceModes button{border:0;background:#f3f5f0;padding:9px 18px;color:#718277}.workspaceModes button.active{background:#e3eee6;color:#285e50}.workspaceModes span{margin-left:12px;font-size:11px}.workspaceModes #toggleCue{margin-left:auto;background:transparent;border:1px solid var(--line);font-size:11px;padding:8px 10px}
.sketchDesk{display:grid;grid-template-columns:72px minmax(0,1fr);gap:16px}.sketchMain{min-width:0}.toolRail{display:flex;flex-direction:column;gap:8px;border-right:1px solid var(--line);padding-right:12px}.toolRail button{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;border:1px solid transparent;border-radius:10px;background:transparent;padding:11px 3px;color:#738379;font:500 9px system-ui;min-height:62px}.toolRail button:hover{background:#f0f5ef}.toolRail button.active{background:#e2eee5;border-color:#c9ddcd;color:#285e50}.toolRail svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round;fill:none}.workspaceTools{background:transparent;border:0;border-radius:0;padding:0 0 10px;margin:0;gap:7px}.workspaceTools button{min-height:30px;padding:5px 9px;font-size:11px;border-color:#e1e6df}.workspaceTools label{font-size:11px}.workspaceTools input[type=range]{width:65px}.workspaceTools .toolDivider{height:18px}.workspaceTools output{font-size:11px}.inkControls{background:#f8faf6;border:1px solid #e8ece4;padding:10px 12px;gap:12px;border-radius:8px}.inkControls .inkLabel{display:none}.inkControls label{font-size:11px}.colorPalette{gap:6px}.colorSwatch{width:24px;height:24px}.inkControls input[type=range]{width:65px}.inkControls input[type=color]{width:26px;height:26px}.brushPreview{width:30px;height:30px;background:white}.drawingTip{font-size:10px;margin:8px 0 12px;color:#8a948b}.drawingWorkspace{gap:12px}.drawingWorkspace.copyMode{grid-template-columns:1fr 1fr}.canvasFrame{border-radius:6px;background:#fffefa;border:1px solid #e1e3d9;box-shadow:0 4px 12px #253b3806;align-self:start}.canvasTag{background:#fffefae8;border:0;border-radius:3px;padding:3px 4px;font-size:9px;letter-spacing:.06em;color:#839080;left:10px;top:10px}.canvasHint{font-size:9px;background:#fffefadc}.copyReference{border-radius:6px;background:#fffefa;position:relative}.referenceCaption{position:absolute;top:10px;left:10px;padding:3px 4px;background:#fffefae8;font-size:9px;color:#839080;pointer-events:none;text-transform:uppercase;letter-spacing:.06em}.comparisonBar{gap:12px;padding-top:15px}.comparisonBar button{font-size:11px;min-height:32px;padding:7px 10px}.comparisonBar label{font-size:11px}.comparisonBar span{font-size:10px}.drawToolbar{border-top:1px solid #edf0e9;padding-top:12px;margin-top:14px;gap:6px}.drawToolbar .btn{padding:8px 11px;font-size:11px;font-weight:500;background:#f2f5ef;color:#5d7263}.studioAside{top:20px}.lessonCard{padding:22px 19px;background:#f9faf6;border-radius:12px;box-shadow:none;border:1px solid #e0e5da}.lessonCard .eyebrow{font-size:9px;color:#82917e}.lessonCard .cueTitle{font-size:20px;margin:6px 0 20px;font-weight:550}.anatomyNote{background:transparent;border:0;border-top:1px solid #dfe6d8;border-radius:0;padding:16px 0 0;margin:0}.anatomyNote p{font-size:12px;line-height:1.85;color:#5e7162}.bookSource{border-top:1px solid #dfe6d8;padding-top:15px;font-size:10px!important;line-height:1.7!important;color:#8a9486!important}.foot{font-size:10px;margin-top:18px}
@media(min-width:1500px){.drawingLayout{grid-template-columns:minmax(0,1fr) 280px}.studio{padding:26px 28px}.sketchDesk{gap:20px}}
@media(max-width:1100px){.drawingLayout{grid-template-columns:1fr}.studioAside{position:static}.drawingWorkspace.copyMode{grid-template-columns:1fr 1fr}.selectedToothHeading{font-size:11px}.shell{padding:0 18px 20px}.top{min-height:78px}.studio{padding:20px}}
@media(max-width:650px){.shell{padding:0 10px 16px}.top{gap:10px;min-height:74px;margin-bottom:12px}.brand{font-size:18px;gap:8px}.logo{width:34px;height:34px}.brandSubtitle{font-size:7px}.selectedToothHeading{display:none}.saveDrawing{margin-left:auto;padding:10px 12px;font-size:11px}.saveDrawing span{margin-left:4px}.studio{padding:14px}.studioHead h2{font-size:18px}.studioHead{margin-bottom:14px}.studioHead #clearDrawing{padding:7px 9px;font-size:10px}.pickerRow{grid-template-columns:1fr 1fr;gap:0}.pickerGroup{padding:7px 10px}.pickerGroup:nth-child(2){border-right:0}.pickerGroup:nth-child(3),.pickerGroup:nth-child(4){border-top:1px solid var(--line)}.workspaceModes{margin-bottom:12px}.workspaceModes button{padding:8px 12px}.workspaceModes span{margin-left:0}.sketchDesk{grid-template-columns:1fr;gap:10px}.toolRail{flex-direction:row;border-right:0;border-bottom:1px solid var(--line);padding:0 0 8px;gap:4px}.toolRail button{flex:1;min-height:52px;padding:7px 4px}.toolRail svg{width:19px;height:19px}.inkControls{gap:10px}.colorSwatch{width:27px;height:27px}.drawingWorkspace.copyMode{grid-template-columns:1fr}.copyReference canvas{max-height:none;object-fit:initial}.comparisonBar{gap:8px}.morphologyRow{max-width:100%;flex-wrap:wrap}.canvasTag{font-size:8px}.drawingTip{line-height:1.6}.studioAside{margin-top:0}}

.workspaceTools #clearDrawing{margin-left:10px;background:transparent;color:#916c63;border-color:transparent;font-weight:500}.workspaceTools #clearDrawing:hover{background:#faf0eb;border-color:#e9d9d0;color:#854e40}
.workspaceTools #clearDrawing{margin-left:10px;background:#fbf0ec;color:#895549;border:1px solid #dfc5bb;border-radius:8px;padding:6px 11px;font-weight:600;min-height:32px}.workspaceTools #clearDrawing:hover{background:#f4e2da;border-color:#c99d8c;color:#713f33}.workspaceTools #clearDrawing:active{background:#ecd4c9}
/* Smooth, accessible tooth selectors */
.pickerGroup{position:relative;min-width:0}.pickerTrigger{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;border:0;background:transparent;text-align:left;padding:5px 0;color:#2d493e;font:600 13px system-ui;border-radius:5px;transition:color .18s,background .18s}.pickerTrigger:hover{color:#087e67}.pickerTrigger:focus-visible{outline:2px solid #80bcae;outline-offset:4px}.pickerTrigger[aria-expanded=true]{color:#087e67}.pickerChevron{display:grid;place-items:center;width:22px;height:22px;border-radius:6px;background:#eaf0e7;font-size:18px;line-height:1;color:#6c8475;transition:transform .2s,background .2s}.pickerTrigger[aria-expanded=true] .pickerChevron{transform:rotate(180deg);background:#d9eade}.pickerMenu{position:absolute;top:calc(100% + 8px);left:4px;right:4px;min-width:150px;z-index:30;padding:6px;background:#fff;border:1px solid #dce6da;border-radius:12px;box-shadow:0 12px 34px #21392c24;animation:pickerReveal .16s ease-out;max-height:310px;overflow:auto}.pickerOption{display:block;position:relative;width:100%;border:0;border-radius:7px;text-align:left;background:transparent;padding:10px 30px 10px 11px;font:500 13px system-ui;color:#53695a;transition:background .12s,color .12s}.pickerOption:hover,.pickerOption:focus-visible{background:#f0f5ec;color:#285e50;outline:none}.pickerOption[aria-selected=true]{background:#e5f0e6;color:#285e50;font-weight:650}.pickerOption[aria-selected=true]:after{content:'✓';position:absolute;right:11px}.pickerOption:focus-visible{box-shadow:inset 0 0 0 2px #91b7a0}@keyframes pickerReveal{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}@media(prefers-reduced-motion:reduce){.pickerMenu{animation:none}.pickerTrigger,.pickerChevron,.pickerOption{transition:none}}@media(max-width:650px){.pickerMenu{left:0;right:0;min-width:0}.pickerOption{font-size:12px;padding-left:9px}}

#randomTooth{border:1px solid #cbdccd;background:#e9f2e8;color:#285e50;white-space:nowrap;transition:background .15s,transform .15s}#randomTooth:hover{background:#dbead9}#randomTooth:active{transform:scale(.97)}#randomTooth span{margin-left:7px}@media(max-width:650px){#randomTooth{font-size:11px;padding:8px 10px}}

.cueFocusLabel{display:block;font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:#7b8e79;margin-bottom:9px}.anatomyNote .cueLead{font-size:13px;color:#365643;line-height:1.7;margin:0}.cuePoints{padding-left:17px;margin:13px 0 0;color:#617663;font-size:12px;line-height:1.75}.cuePoints li{padding-left:3px;margin-bottom:10px}.cuePoints li::marker{color:#9ab39a}

.toothFacts{border-top:1px solid #dfe6d8;margin-top:22px;padding-top:16px}.toothFacts h3{display:inline-block;margin:0 0 12px;padding:5px 10px;border-radius:7px;background:#e5eee0;color:#3b6847;font-size:12px;letter-spacing:.02em}.toothFacts ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}.toothFacts li{padding:10px 12px;border-left:2px solid #bfd2b8;background:#f0f4ec;border-radius:0 7px 7px 0;color:#536b57;font-size:12px;line-height:1.7}.anatomyNote .factsNote{font-size:10px;color:#8a9784;margin:12px 0 0}
/* Theme switch: paper and exported artwork retain their original colors. */
.themeToggle{border:1px solid #cbd8cd;border-radius:9px;padding:11px 13px;background:transparent;color:#476251;font:600 12px system-ui;white-space:nowrap}.themeToggle:hover{background:#e7eee4}
html[data-theme=dark]{color-scheme:dark;--ink:#e0e9e3;--muted:#a5b6aa;--paper:#151b18;--white:#202823;--line:#354339;--teal:#8dc5a9;--shadow:none}
[data-theme=dark] body{background:#151b18;color:#e0e9e3}
[data-theme=dark] .top{border-color:#354339}[data-theme=dark] .brandSubtitle,[data-theme=dark] .selectedToothHeading{color:#a1b5a6}[data-theme=dark] .logo{background:#345b49}
[data-theme=dark] .studio{background:#202823;border-color:#354339}[data-theme=dark] .studioHead .eyebrow{color:#9eb5a5}[data-theme=dark] .pickerRow{background:#263129;border-color:#405045}[data-theme=dark] .pickerGroup{border-color:#405045}[data-theme=dark] .pickerLabel{color:#a8b9ab}[data-theme=dark] .pickerTrigger{color:#e1ece3}[data-theme=dark] .pickerTrigger:hover,[data-theme=dark] .pickerTrigger[aria-expanded=true]{color:#b2dfc4}[data-theme=dark] .pickerChevron{background:#354638;color:#c2d8c6}[data-theme=dark] .pickerTrigger[aria-expanded=true] .pickerChevron{background:#45604c}[data-theme=dark] .pickerMenu{background:#29372d;border-color:#49614e;box-shadow:0 12px 34px #0006}[data-theme=dark] .pickerOption{color:#d6e4d9}[data-theme=dark] .pickerOption:hover,[data-theme=dark] .pickerOption:focus-visible{background:#364d3d;color:#ecf8ed}[data-theme=dark] .pickerOption[aria-selected=true]{background:#405c48;color:#e2f5e5}
[data-theme=dark] .morphologyRow{background:#28362c;border-color:#405045;color:#c3d8c9}[data-theme=dark] .morphologyRow select{background:#202c24;border-color:#4d6454;color:#e1ece3}
[data-theme=dark] .workspaceModes{border-color:#3b4a3f}[data-theme=dark] .workspaceModes button{background:#2d3a30;color:#bbcfbf}[data-theme=dark] .workspaceModes button.active{background:#3c5a47;color:#e2f4e8}[data-theme=dark] .workspaceModes span{color:#a4baab}[data-theme=dark] .workspaceModes #toggleCue{color:#bcd3c4;border-color:#455a4b;background:transparent}
[data-theme=dark] .toolRail{border-color:#3b4a3f}[data-theme=dark] .toolRail button{color:#b2c7b9}[data-theme=dark] .toolRail button:hover{background:#2d4034}[data-theme=dark] .toolRail button.active{background:#375541;border-color:#57775e;color:#d5f0dc}
[data-theme=dark] .workspaceTools button,[data-theme=dark] .comparisonBar button{background:#293a2f;border-color:#465f4e;color:#c8e0cf}[data-theme=dark] .workspaceTools label,[data-theme=dark] .comparisonBar label{color:#b7cbbe}[data-theme=dark] .toolDivider{border-color:#506456}[data-theme=dark] .workspaceTools #clearDrawing{background:#47332c;border-color:#78574a;color:#efc3b2}[data-theme=dark] .workspaceTools #clearDrawing:hover{background:#5b3d32}
[data-theme=dark] .inkControls{background:#26332b;border-color:#3c5042}[data-theme=dark] .inkControls label{color:#c0d2c4}[data-theme=dark] .colorSwatch{border-color:#26332b;box-shadow:0 0 0 1px #7d9383}[data-theme=dark] .colorSwatch[aria-pressed=true]{box-shadow:0 0 0 2px #e7f5e6}[data-theme=dark] .inkControls input[type=color]{background:#33483a;border-color:#607667}[data-theme=dark] .drawingTip{color:#a6b8ab}[data-theme=dark] .comparisonBar span{color:#a6bdad}[data-theme=dark] .comparisonBar button[aria-pressed=true]{background:#43634e;color:#e4f2e8}[data-theme=dark] .drawToolbar{border-color:#3b4a3f}[data-theme=dark] .drawToolbar .btn{background:#304437;color:#c8dfce}
[data-theme=dark] .lessonCard{background:#222e26;border-color:#3c5042}[data-theme=dark] .lessonCard .eyebrow,[data-theme=dark] .cueFocusLabel{color:#acc4ae}[data-theme=dark] .anatomyNote{border-color:#425745}[data-theme=dark] .anatomyNote .cueLead{color:#d0e2d2}[data-theme=dark] .cuePoints{color:#bacfbd}[data-theme=dark] .toothFacts{border-color:#425745}[data-theme=dark] .toothFacts h3{background:#38553c;color:#d6ead6}[data-theme=dark] .toothFacts li{background:#2b3d2e;border-color:#69896a;color:#c6dac7}[data-theme=dark] .anatomyNote .factsNote{color:#a4b8a1}[data-theme=dark] .foot{color:#99ab9d}
[data-theme=dark] .themeToggle{color:#d0e6d5;border-color:#526c58}[data-theme=dark] .themeToggle:hover{background:#314636}[data-theme=dark] .saveDrawing{background:#93c9a7;color:#163322}[data-theme=dark] .saveDrawing:hover{background:#afdabb}[data-theme=dark] #randomTooth{background:#35513c;border-color:#5b7b61;color:#d6efd9}[data-theme=dark] #randomTooth:hover{background:#42634a}
.canvasFrame,.copyReference{color-scheme:light}
@media(max-width:650px){.top{flex-wrap:wrap;padding:12px 0;gap:9px}.top .brand{flex:1}.themeToggle{font-size:11px;padding:9px}.top .saveDrawing{margin-left:0}}