.momi {
            font-family: 'Arial', sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            margin: 0;
            
        }
        #tambourineImage {
            width: 250px;
            height: 250px;
            background-image: url('https://u.jimcdn.com/cms/o/s939e7d60f2541492/userlayout/img/ta-removebg-preview.png?t=1745596054');
            background-size: cover;
            background-position: center;
            display: block;
            animation: none;
            transition: transform 0.1s ease-in-out;
        }

        @keyframes shake {
            0% { transform: translateX(0); }
            25% { transform: translateX(-10px); }
            50% { transform: translateX(10px); }
            75% { transform: translateX(-10px); }
            100% { transform: translateX(0); }
        }

        /* ポップアップスタイル */
        .fullscreen-popup {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            display: flex;
            justify-content: center;
            align-items: center;
            color: #fff;
            font-family: 'Arial', sans-serif;
            text-align: center;
            z-index: 9999;
            padding: 20px;
            box-sizing: border-box;
            visibility: hidden; /* 初めは非表示 */
            opacity: 0;
            transition: visibility 0s 0.5s, opacity 0.5s linear;
        }
        
        /* ポップアップ内容 */
        .popup-content {
            background-color: #fff;
            color: #333;
            border-radius: 8px;
            padding: 30px;
            width: 80%;
            max-width: 500px;
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
        }

        .popup-content h3 {
            font-size: 24px;
            margin-bottom: 20px;
        }

        .popup-content p {
            font-size: 18px;
            margin-bottom: 30px;
        }

        .popup-button {
            background-color: #4CAF50; /* 落ち着いたグリーン */
            color: white;
            border: none;
            padding: 15px 32px;
            font-size: 16px;
            cursor: pointer;
            border-radius: 5px;
            text-align: center;
            transition: background-color 0.3s;
        }

        .popup-button:hover {
            background-color: #45a049;
        }