body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 10px;
}
.container {
    max-width: 600px;
    margin: auto;
}
h1 {
    text-align: center;
}
select, button {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
}
#question-container {
    padding: 15px;
    border: 1px solid #ccc;
    margin-bottom: 10px;
}
.navigation {
    display: flex;
    justify-content: space-between;
}
.navigation a {
    width: 48%;
}
button {
    width: 100%;
    padding: 15px;
    font-size: 16px;
}
#progress, #version {
    text-align: center;
    font-size: 14px;
}
#feedback {
    color: green;
    font-weight: bold;
}
@media (max-width: 480px) {
    button {
        padding: 15px;
    }
}