body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

#exam-container {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    width: 90%;
    max-width: 600px;
    padding: 20px;
    text-align: center;
    box-sizing: border-box;
}

header {
    margin-bottom: 20px;
}

h1 {
    color: #2c3e50;
    font-size: 1.8em;
    margin: 0;
}

.intro-text {
    margin-bottom: 25px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border: 1px solid #e9ecef;
    font-size: 1em;
}

#question {
    font-size: 1.2em;
    margin-bottom: 20px;
    color: #34495e;
}

#options {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.option {
    padding: 12px;
    border: 2px solid #dfe6e9;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    background-color: #fff;
}

.option:hover {
    background-color: #3498db;
    color: #fff;
    border-color: #3498db;
}

.option input {
    margin-right: 10px;
}

.option label {
    cursor: pointer;
    font-size: 1em;
}

#submit {
    background-color: #3498db;
    color: #fff;
    border: none;
    padding: 12px 24px;
    font-size: 1em;
    border-radius: 8px;
    cursor: pointer;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

#submit:hover {
    background-color: #2980b9;
}

.result {
    font-size: 1.2em;
    margin-top: 20px;
    display: none;
    color: #2c3e50;
}

@media (max-width: 600px) {
    #exam-container {
        width: 95%;
        padding: 15px;
    }

    h1 {
        font-size: 1.5em;
    }

    #question {
        font-size: 1em;
    }

    .option {
        padding: 10px;
    }

    #submit {
        padding: 10px 20px;
    }
}