body {
    font-family: Arial, sans-serif;
    background: linear-gradient(to right, #4e73df, #1cc88a);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.quiz-container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    width: 400px;
    text-align: center;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
}

h1 {
    margin-bottom: 20px;
}

.buttons {
    margin: 20px 0;
}

.answer-btn {
    width: 100px;
    padding: 10px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    background-color: #4e73df;
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: 0.3s ease;
}

/* Hover Effect */
.answer-btn:hover {
    background-color: #2e59d9;
    transform: scale(1.05);
}

/* Selected Effect */
.answer-btn.selected {
    background-color: #f6c23e;
    color: black;
    transform: scale(1.1);
}

/* Disabled Next Button */
#next-btn:disabled {
    background-color: gray;
    cursor: not-allowed;
}