:root{--bg:#f4f4ef;--canvas-bg:#fbfbf8;--toolbar-bg:#fcfcf9;--panel-bg:#fff;--border:#e4e4dc;--border-strong:#cfcfc4;--text:#33332e;--muted:#6e6e66;--accent:#6c5ce7;--accent-soft:#6c5ce71f;--accent-hover:#5a4bd4;--shadow:0 1px 3px #0000000f, 0 6px 18px #0000000f;--grid-dot:#00000017;--radius:8px;--radius-sm:6px;--transition:.15s ease;--font-ui:-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}[data-theme=dark]{--bg:#1c1c1c;--canvas-bg:#202020;--toolbar-bg:#1f1f1f;--panel-bg:#2a2a2a;--border:#383838;--border-strong:#4a4a4a;--text:#e6e6e2;--muted:#9a9a92;--accent:#8b87ff;--accent-soft:#8b87ff29;--accent-hover:#9f9cff;--shadow:0 1px 3px #0006, 0 6px 18px #0006;--grid-dot:#ffffff17}*{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%}body{font-family:var(--font-ui);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-size:14px;overflow:hidden}button,input,select{font-family:inherit;font-size:inherit;color:inherit}button{cursor:pointer}::selection{background:var(--accent-soft)}.app{width:100%;height:100%;position:relative}.wb-topbar,.wb-props,.wb-rail{z-index:100;background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:6px;position:absolute}.wb-topbar{align-items:center;gap:8px;max-width:calc(100vw - 28px);display:flex;top:14px;left:14px}.brand{border-right:1px solid var(--border);-webkit-user-select:none;user-select:none;align-items:center;gap:8px;padding:0 6px 0 8px;display:flex}.brand-dot{background:linear-gradient(135deg, var(--accent), var(--accent-hover));width:14px;height:14px;box-shadow:0 0 0 2px var(--accent-soft);border-radius:4px}.brand-name{color:var(--text);white-space:nowrap;font-size:13px;font-weight:700}.wb-tools{align-items:center;gap:2px;display:flex}.wb-divider{background:var(--border);flex-shrink:0;width:1px;height:26px}.wb-props{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:4px;max-width:calc(100vw - 28px);display:flex;top:14px;right:14px}.wb-rail{flex-direction:column;align-items:center;gap:8px;padding:8px 6px;display:flex;top:50%;right:14px;transform:translateY(-50%)}.rail-group{flex-direction:column;align-items:center;gap:2px;display:flex}.rail-group+.rail-group{border-top:1px solid var(--border);padding-top:6px}.rail-zoom .toolbar-btn{min-width:34px;height:34px}.toolbar-btn{border-radius:var(--radius-sm);min-width:38px;height:38px;color:var(--muted);transition:background var(--transition), color var(--transition), box-shadow var(--transition);background:0 0;border:none;justify-content:center;align-items:center;padding:0 6px;display:inline-flex}.toolbar-btn:hover{background:var(--border);color:var(--text)}.toolbar-btn.active{background:var(--accent);color:#fff}.toolbar-btn:disabled{opacity:.35;cursor:not-allowed}.toolbar-btn:disabled:hover{color:var(--muted);background:0 0}.toolbar-btn svg{stroke:currentColor;fill:none;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:20px;height:20px}.btn-label{padding-right:2px;font-size:12px;font-weight:600}.color-field{cursor:pointer;align-items:center;gap:6px;padding:0 8px;display:inline-flex}.color-swatch{border:2px solid var(--border-strong);width:26px;height:26px;transition:transform var(--transition);border-radius:50%;position:relative;overflow:hidden;box-shadow:inset 0 0 0 1px #fff6}.color-swatch:hover{transform:scale(1.08)}.color-swatch input{opacity:0;cursor:pointer;width:calc(100% + 12px);height:calc(100% + 12px);position:absolute;inset:-6px}.color-label{color:var(--muted);font-size:12px}.size-slider-wrap{align-items:center;gap:6px;height:38px;padding:0 8px;display:inline-flex}.slider-label{color:var(--muted);white-space:nowrap;font-size:11px}.size-slider{width:84px;accent-color:var(--accent);cursor:pointer}.slider-value{color:var(--muted);text-align:right;font-variant-numeric:tabular-nums;min-width:18px;font-size:11px}.font-select{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--toolbar-bg);height:34px;color:var(--text);cursor:pointer;max-width:150px;padding:0 8px;font-size:13px}.zoom-indicator{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--toolbar-bg);min-width:52px;height:32px;color:var(--text);font-variant-numeric:tabular-nums;transition:background var(--transition);font-size:12px}.zoom-indicator:hover{background:var(--border)}.menu{position:relative}.menu-btn{border-radius:var(--radius-sm);background:var(--accent-soft);height:38px;color:var(--accent);transition:background var(--transition), color var(--transition);border:none;align-items:center;gap:6px;padding:0 10px;display:inline-flex}.menu-btn:hover{background:var(--accent);color:#fff}.menu-btn svg{stroke:currentColor;fill:none;stroke-width:2px;stroke-linecap:round;stroke-linejoin:round;width:18px;height:18px}.menu-items{background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--radius);min-width:150px;box-shadow:var(--shadow);z-index:200;flex-direction:column;gap:2px;padding:6px;display:flex;position:absolute;top:calc(100% + 6px);right:0}.menu-items button{text-align:left;border-radius:var(--radius-sm);color:var(--text);transition:background var(--transition);background:0 0;border:none;padding:8px 10px;font-size:13px}.menu-items button:hover{background:var(--border)}.canvas-container{background:var(--canvas-bg);position:absolute;inset:0;overflow:hidden}.canvas-container.grid{background-image:radial-gradient(circle, var(--grid-dot) 1.5px, transparent 1.5px);background-position:12px 12px;background-size:24px 24px}.whiteboard-canvas{position:absolute;inset:0}.whiteboard-canvas canvas{touch-action:none;display:block}.hintbar{z-index:90;background:var(--panel-bg);border:1px solid var(--border);box-shadow:var(--shadow);color:var(--muted);white-space:nowrap;border-radius:999px;gap:22px;max-width:calc(100vw - 28px);padding:7px 16px;font-size:12px;display:flex;position:absolute;bottom:14px;left:50%;transform:translate(-50%)}.hintbar b{color:var(--text);font-weight:600}@media (width<=1100px){.hintbar span:nth-child(2){display:none}}.overlay{z-index:999;background:#00000059;animation:.15s fade-in;position:fixed;inset:0}.modal{background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:1000;min-width:320px;max-width:92vw;max-height:86vh;padding:22px;animation:.16s pop-in;position:fixed;top:50%;left:50%;overflow:auto;transform:translate(-50%,-50%)}.modal h3{color:var(--text);margin-bottom:18px;font-size:17px;font-weight:700}.form-row{gap:16px;margin-bottom:16px;display:flex}.form-row label{color:var(--muted);flex-direction:column;gap:6px;font-size:13px;font-weight:600;display:flex}.form-row input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--toolbar-bg);width:90px;color:var(--text);padding:8px 10px;font-size:14px}.table-editor{flex-direction:column;gap:6px;max-height:40vh;margin-bottom:20px;padding:2px;display:flex;overflow:auto}.table-editor-row{gap:6px;display:flex}.table-editor input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--toolbar-bg);min-width:0;color:var(--text);flex:1;padding:8px 10px;font-size:13px}.table-editor input.table-header-cell{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:700}.chart-type-grid{grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:18px;display:grid}.chart-type-btn{border:2px solid var(--border);border-radius:var(--radius);background:var(--toolbar-bg);color:var(--muted);transition:border-color var(--transition), color var(--transition), background var(--transition);flex-direction:column;align-items:center;gap:8px;padding:14px 8px;display:flex}.chart-type-btn:hover{border-color:var(--border-strong);color:var(--text)}.chart-type-btn.active{border-color:var(--accent);color:var(--accent);background:var(--accent-soft)}.chart-data{flex-direction:column;gap:8px;margin-bottom:12px;display:flex}.chart-data-head,.chart-data-row{grid-template-columns:1fr 70px 44px 28px;align-items:center;gap:8px;display:grid}.chart-data-head{color:var(--muted);text-transform:uppercase;letter-spacing:.04em;font-size:11px}.chart-data-row input{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--toolbar-bg);width:100%;color:var(--text);padding:7px 8px;font-size:13px}.chart-data-row input[type=color]{cursor:pointer;height:32px;padding:2px}.row-remove{border-radius:var(--radius-sm);width:28px;height:28px;color:var(--muted);transition:background var(--transition), color var(--transition);background:0 0;border:none;font-size:18px;line-height:1}.row-remove:hover{color:#e45756;background:#e4575626}.add-row{margin-bottom:20px}.btn-group{justify-content:flex-end;gap:10px;margin-top:20px;display:flex}.modal button.btn-primary,.modal button.btn-secondary{border-radius:var(--radius-sm);transition:background var(--transition);border:none;padding:9px 18px;font-size:14px;font-weight:600}.btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-hover)}.btn-secondary{background:var(--border);color:var(--text)}.btn-secondary:hover{background:var(--border-strong)}@keyframes fade-in{0%{opacity:0}to{opacity:1}}@keyframes pop-in{0%{opacity:0;transform:translate(-50%,-48%)scale(.96)}to{opacity:1;transform:translate(-50%,-50%)scale(1)}}@media (width<=860px){.wb-topbar{max-width:calc(100vw - 28px)}.wb-props{top:auto;bottom:58px;right:14px}.color-label,.slider-label{display:none}.size-slider{width:60px}}