body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}
.login-container, #test-area {
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    width: 300px;
    text-align: center;
}
.hidden {
    display: none;
}
button {
    background-color: #007bff;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
}

.question-box {
    font-size: 20px; /* Larger text */
    border: 2px solid #333;
    padding: 20px;
    margin-bottom: 15px;
    background: white;
    border-radius: 8px;
}

.question-box button {
    font-size: 18px;
    padding: 12px;
    margin: 5px;
    width: 100%;
}

.selected {
    background-color: #007bff;
    color: white;
}

.navigation-buttons {
    margin-top: 20px;
}