:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:dark;color:#ffffffde;background-color:#242424}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;overflow:hidden}.app-container{width:100vw;height:100vh;position:relative;background-color:#1a1a1a}.whiteboard-container{width:100%;height:100%;overflow:hidden;position:relative;background-color:#111;touch-action:none}.transform-layer{position:absolute;top:0;left:0;will-change:transform;cursor:crosshair}.background-layer{position:absolute;top:0;left:0;width:100%;height:100%;z-index:1;pointer-events:none;-webkit-user-select:none;user-select:none}.canvas-layer{position:absolute;top:0;left:0;z-index:2;cursor:crosshair}.ui-overlay{position:fixed;top:20px;left:20px;pointer-events:none;z-index:10}.toolbar{position:fixed;bottom:30px;left:50%;transform:translate(-50%);background:#14141ed9;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);padding:12px 24px;border-radius:16px;display:flex;gap:16px;box-shadow:0 8px 32px #00000080;border:1px solid rgba(255,255,255,.1);z-index:10;align-items:center}.divider{width:1px;height:24px;background:#fff3}.tool-btn{background:transparent;border:1px solid rgba(255,255,255,.1);color:#ccc;width:40px;height:40px;display:grid;place-items:center;border-radius:8px;cursor:pointer;transition:all .2s;font-size:1.2rem}.tool-btn:hover{background:#ffffff1a;color:#fff}.tool-btn.active{background:#409cff33;border-color:#409cff80;color:#409cff;box-shadow:0 0 12px #409cff4d}.color-picker{display:flex;gap:8px;align-items:center}.color-swatch{width:24px;height:24px;border-radius:50%;cursor:pointer;border:2px solid transparent;transition:transform .2s}.color-swatch:hover{transform:scale(1.1)}.color-swatch.active{border-color:#fff;box-shadow:0 0 8px currentColor}.user-sidebar{position:fixed;top:20px;right:20px;width:220px;background:#14141ee6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-radius:12px;padding:16px;border:1px solid rgba(255,255,255,.1);color:#fff;box-shadow:0 8px 32px #00000080;z-index:20}.user-sidebar h3{margin:0 0 12px;font-size:.9rem;text-transform:uppercase;color:#999}.user-list{display:flex;flex-direction:column;gap:8px;max-height:400px;overflow-y:auto}.user-row{display:flex;align-items:center;gap:8px;padding:8px;background:#ffffff0d;border-radius:6px;font-size:.9rem}.user-dot{width:10px;height:10px;border-radius:50%}.user-name{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.zoom-controls{position:fixed;bottom:30px;right:20px;background:#000c;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);border-radius:8px;display:flex;align-items:center;gap:8px;padding:4px;z-index:10;color:#fff;font-family:monospace}.zoom-controls button{background:#444;border:none;color:#fff;width:24px;height:24px;border-radius:4px;cursor:pointer}.login-overlay{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000c;display:grid;place-items:center;z-index:100}.login-card{background:#222;padding:32px;border-radius:16px;border:1px solid #444;text-align:center;width:300px}.login-card input{background:#333;border:1px solid #555;color:#fff;padding:12px;border-radius:8px;width:100%;box-sizing:border-box;margin-bottom:16px;font-size:1rem}.login-card .color-picker-row{display:flex;justify-content:center;gap:12px;margin-bottom:24px}.login-card button{background:#3b82f6;color:#fff;border:none;padding:12px 24px;border-radius:8px;font-weight:700;cursor:pointer;font-size:1rem;width:100%}.login-card button:hover{background:#2563eb}