.letter, .dropzone {
            width: 40px;
            height: 40px;
            margin: 5px;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            background-color: #d0e0f0;
        }
        .dropzone {
            border: 2px dashed #555;
            background-color: #f0f0f0;
        }
        .correct {
            background-color: #90ee90 !important;
        }
        .incorrect {
            background-color: #ffcccc !important;
            animation: shake 0.5s;
        }
        .disabled {
            opacity: 0.5;
            pointer-events: none;
        }
        .selected {
            border: 2px solid #007bff;
        }
        @keyframes shake {
            0% { transform: translate(0); }
            25% { transform: translate(-5px); }
            50% { transform: translate(5px); }
            75% { transform: translate(-5px); }
            100% { transform: translate(0); }
        }
				#game {
            margin-top: 20px;
        }
        #welcomeMessage {
            font-size: 36px;
        }
        #score {
            font-size: 36px;
        }