:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;min-width:320px;min-height:100vh;touch-action:none;user-select:none;-webkit-user-select:none;overflow:hidden;background-color:#f9f9f9}#root{width:100%;height:100vh;display:flex;flex-direction:column}@supports (height: 100dvh){body{min-height:100dvh}#root{height:100dvh}}.app-container{display:flex;flex-direction:column;height:100%;width:100%}.top-bar{flex:0 0 auto;padding:10px;background-color:#fff;box-shadow:0 2px 5px #0000001a;z-index:40;display:flex;align-items:flex-start;flex-wrap:wrap;gap:10px 12px;overflow-x:hidden;overflow-y:visible;position:relative}.canvas-area{flex:1 1 auto;position:relative;background-color:var(--canvas-bg, #ffffff);touch-action:none;overflow:hidden;z-index:0}.bottom-bar{flex:0 0 auto;padding:10px;padding-bottom:calc(10px + env(safe-area-inset-bottom));background-color:#fff;box-shadow:0 -2px 5px #0000001a;z-index:20;display:flex;justify-content:space-around;align-items:center}.color-picker-container{display:flex;align-items:flex-start;flex:1;min-width:260px;gap:8px}.color-groups{display:flex;flex-direction:column;flex:1;min-width:0;gap:6px;position:relative}.color-row{display:flex;align-items:center;gap:8px;min-width:0}.colors-scroll{display:flex;overflow-x:auto;flex:1;gap:12px;padding:4px;scrollbar-width:none;min-width:0}.colors-scroll::-webkit-scrollbar{display:none}.color-chip{width:44px;height:44px;border-radius:50%;border:4px solid white;box-shadow:0 2px 4px #0003;flex-shrink:0;cursor:pointer;transition:transform .1s,border-color .1s}.color-chip.selected{transform:scale(1.15);border-color:#333}.color-chip.rainbow{background:linear-gradient(135deg,red,orange,#ff0,green,#00f,indigo,violet);font-size:20px;display:flex;align-items:center;justify-content:center;border:2px solid #ddd}.color-chip.rainbow.selected{border-color:#333}.bg-toggle-btn{height:36px;min-width:56px;padding:0 10px;border-radius:18px;border:2px solid #ddd;background:#fff;color:#333;font-size:12px;font-weight:600;cursor:pointer;white-space:nowrap}.bg-toggle-btn.active{border-color:#333;box-shadow:0 2px 6px #00000026}.bg-popover{position:fixed;top:calc(var(--top-bar-height, 60px) + 6px);left:10px;right:10px;background:#fff;border-radius:14px;padding:6px 8px;box-shadow:0 6px 14px #00000026;z-index:35}.bg-colors-scroll{display:flex;overflow-x:auto;overflow-y:hidden;gap:10px;padding:2px 4px;scrollbar-width:none;min-width:0;width:100%;touch-action:pan-x;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;overscroll-behavior-y:none}.bg-colors-scroll::-webkit-scrollbar{display:none}.bg-color-chip{width:32px;height:32px;border-radius:50%;border:3px solid white;box-shadow:0 1px 3px #0003;flex-shrink:0;cursor:pointer;transition:transform .1s,border-color .1s}.bg-color-chip.selected{transform:scale(1.1);border-color:#333}.sound-control{position:relative;padding-left:12px;border-left:1px solid #eee;margin-left:8px}.sound-btn{font-size:24px;background:transparent;border:none;cursor:pointer;border-radius:12px;padding:2px 4px}.sound-btn.active{background:#f4f4f4}.sound-popover{position:fixed;top:calc(var(--top-bar-height, 60px) + 6px);right:10px;width:min(300px,calc(100vw - 20px));background:#fff;border-radius:14px;padding:10px 12px;box-shadow:0 6px 14px #00000026;z-index:35;display:flex;flex-direction:column;gap:10px}.sound-enabled-toggle{height:36px;border-radius:18px;border:2px solid #ddd;background:#fff;color:#333;font-size:13px;font-weight:600;cursor:pointer}.sound-enabled-toggle.active{border-color:#333}.sound-volume-label{font-size:13px;font-weight:600;color:#333}.sound-volume-range{width:100%;accent-color:#ff8a00}.control-bar-container{display:flex;width:100%;justify-content:space-between;align-items:center}.brush-sizes{display:flex;gap:8px}.size-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;background:#fff;border:1px solid #ddd;border-radius:8px;padding:4px 8px;min-width:50px;cursor:pointer}.size-btn.active{background-color:#e0f7fa;border-color:#00bcd4}.size-btn .dot{background-color:#000;border-radius:50%;margin-bottom:4px}.size-btn span{font-size:10px;color:#555}.tools{display:flex;gap:8px}.tool-btn{background:#fff;border:1px solid #ddd;border-radius:8px;padding:10px 12px;font-size:14px;cursor:pointer;position:relative;overflow:hidden}.tool-btn.active{background-color:#ffe0b2;border-color:#ff9800}.tool-btn:disabled{opacity:.5;cursor:not-allowed}.clear-btn{background-color:#ffebee;border-color:#ef9a9a;color:#d32f2f}.progress-bg{position:absolute;top:0;left:0;height:100%;background-color:#ff00004d;z-index:0}.btn-text{position:relative;z-index:1}.stamp-picker-container,.stamp-row{display:flex;align-items:center;gap:8px}.stamp-toggle-btn,.stamp-draw-btn{height:36px;border-radius:18px;border:2px solid #ddd;background:#fff;color:#333;font-size:12px;font-weight:600;cursor:pointer}.stamp-toggle-btn{min-width:56px;padding:0 10px;white-space:nowrap}.stamp-draw-btn{min-width:40px;padding:0 10px}.stamp-toggle-btn.active,.stamp-draw-btn.active{border-color:#333;box-shadow:0 2px 6px #00000026}.stamp-popover{position:fixed;top:calc(var(--top-bar-height, 60px) + 6px);left:10px;right:10px;background:#fff;border-radius:14px;padding:6px 8px;box-shadow:0 6px 14px #00000026;z-index:35}.stamp-items-scroll{display:flex;overflow-x:auto;overflow-y:hidden;gap:10px;padding:2px 4px;scrollbar-width:none;min-width:0;width:100%;touch-action:pan-x;-webkit-overflow-scrolling:touch;overscroll-behavior-x:contain;overscroll-behavior-y:none}.stamp-items-scroll::-webkit-scrollbar{display:none}.stamp-item-chip{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-width:64px;height:44px;border-radius:12px;border:2px solid #e0e0e0;background:#fff;box-shadow:0 1px 2px #0000001f;padding:6px 8px;cursor:pointer;flex-shrink:0}.stamp-item-chip.selected{border-color:#333;transform:scale(1.02)}.stamp-icon{font-size:20px;line-height:1}.stamp-label{font-size:11px;color:#333}