body{font-family:Comic Sans MS,Arial,sans-serif;background-color:#add8e6;margin:0;padding:0;color:#333}.main-menu{text-align:center;padding:20px;background-color:#fff;margin:20px auto;max-width:auto;border-radius:15px;width:100vh}h1{color:#0072ce;font-family:Comic Sans MS,sans-serif;font-size:2.5em}button{background-color:#ffcc4d;color:#333;border:none;padding:15px 25px;margin:10px;cursor:pointer;border-radius:20px;font-size:18px;font-family:Comic Sans MS,sans-serif;transition:background-color .3s ease}button:hover{background-color:#ffeb3b}button:focus{outline:none}.exit-button:hover{background-color:#e64e4e}.game-container{display:flex;flex-direction:column;align-items:center;justify-content:center;height:100vh}.question-container{display:flex;align-items:center;margin-bottom:20px;background-color:#fff;border-radius:15px;padding-top:15px;padding-bottom:15px}.options-container{display:flex;flex-wrap:wrap;justify-content:center}.number-image{width:150px;height:150px;margin:0 10px}.option-button{margin:10px;padding:10px 20px;font-size:16px;cursor:pointer}.operator,.equals{font-size:24px;margin:0 5px}.feedback-message{margin-top:10px}.back-button{margin-top:20px;padding:10px 20px;font-size:16px}.option-button.correct{background-color:#4caf50;color:#fff}.option-button.incorrect{background-color:red;color:#fff}.option-button.disabled{background-color:#d3d3d3;cursor:not-allowed}