:root{--bg: #1a1a2e;--surface: #16213e;--surface-alt: #0f3460;--text: #e0e0e0;--text-muted: #888;--accent: #e94560;--accent-hover: #ff6b81;--border: #2a2a4a;--radius: 8px}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{height:100%;width:100%;overflow:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.app{display:grid;grid-template-columns:1fr 6px 1fr;height:100vh;background:var(--border)}.resize-handle{background:var(--border);cursor:col-resize;position:relative;z-index:5;touch-action:none}.resize-handle:hover,.resize-handle:active{background:var(--accent)}.source-panel{background:var(--surface);display:flex;flex-direction:column;overflow:hidden}.source-panel__header{display:flex;gap:0;border-bottom:1px solid var(--border)}.source-panel__tab{flex:1;padding:10px 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svg{width:100%;height:100%}.circle-overlay__handle{pointer-events:all;cursor:grab}.circle-overlay__handle:active{cursor:grabbing}.circle-overlay__resize{pointer-events:all;cursor:nwse-resize}.webcam-actions{display:flex;flex-wrap:wrap;gap:8px;padding:8px 12px;background:var(--surface);border-top:1px solid var(--border);align-items:center}.image-upload{flex:1;display:flex;flex-direction:column;min-height:200px}.image-upload__dropzone{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;border:2px dashed var(--border);margin:12px;border-radius:var(--radius);cursor:pointer;transition:border-color .15s;position:relative;overflow:hidden}.image-upload__dropzone--active{border-color:var(--accent);background:#e945600d}.image-upload__dropzone--has-image{border-style:solid;background:#000;cursor:default}.image-upload__dropzone 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