body {
    font-family: sans-serif;
    margin: 0;
    padding: 20px;
    background-color: #f4f7f6;
    color: #333;
}
#app {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    border-radius: 8px;
}
.view {
    display: none;
}
.view.active {
    display: block;
}
.quiz-item {
    border: 1px solid #ddd;
    padding: 10px;
    margin-bottom: 10px;
    cursor: pointer;
    border-radius: 4px;
    background: #eef;
}
.quiz-item:hover {
    background: #dde;
}
.introduction {
    color: #555;
    font-style: italic;
    margin-bottom: 15px;
}
#result-message {
    color: green;
    font-size: 1.5em;
    border-bottom: 2px solid green;
    padding-bottom: 10px;
}
#result-message.incorrect {
    color: red;
    border-bottom-color: red;
}
.award {
    font-size: 1.2em;
    font-weight: bold;
    color: darkorange;
}
input[type="radio"], input[type="text"] {
    margin: 5px 10px 5px 0;
}