@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+TC:wght@400;500;700&display=swap');
        body { 
            font-family: 'Noto+Sans+TC', sans-serif;
            background-color: #f1f5f9;
            overflow-x: hidden;
        }
        /* 隱藏數字輸入框微調按鈕 */
        input[type="number"]::-webkit-inner-spin-button,
        input[type="number"]::-webkit-outer-spin-button {
            -webkit-appearance: none;
            margin: 0;
        }
        input[type="number"] {
            -moz-appearance: textfield;
        }
        /* 自定義捲軸 */
        #previewBox::-webkit-scrollbar,
        #historyList::-webkit-scrollbar {
            width: 6px;
        }
        #previewBox::-webkit-scrollbar-thumb,
        #historyList::-webkit-scrollbar-thumb {
            background-color: #cbd5e1;
            border-radius: 10px;
        }
        /* 側邊欄動畫 */
        .sidebar-transition {
            transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        /* 彈窗動畫 */
        .modal-enter {
            opacity: 0;
            transform: scale(0.9);
        }
        .modal-enter-active {
            opacity: 1;
            transform: scale(1);
            transition: opacity 0.2s ease-out, transform 0.2s ease-out;
        }
        /* Loading 旋轉動畫 */
        .spinner {
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }