body {
    font-family: 'Roboto', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f0f0f0;
    margin: 0;
}

.container {
    text-align: center;
    width: 90%;
    max-width: 600px;
}

.question-card {
    background-color: #ffffff;
    padding: 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.question-btn {
    padding: 10px 20px;
    font-size: 16px;
    color: #222222;
    background-color: #d6d6d6; /* Primary blue from Material Design palette */
    border: none;
    border-radius: 2px;
    cursor: pointer;
    outline: none;
    transition: background-color 0.3s;
}

.question-btn:hover {
    background-color: #a5a5a5; /* Darker shade of blue for hover effect */
}