body {
    font-family: Arial, sans-serif;
    padding: 20px;
    background: #f4f4f4;
    transition: background 0.3s, color 0.3s;
}
.dark {
    background: #121212;
    color: #fff;
}
.quiz-container {
    max-width: 400px;
    margin: auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0,0,0,0.1);
}
.dark .quiz-container {
    background: #1e1e1e;
}
#question-image {
    max-width: 100%;
    height: auto;
    margin-bottom: 15px;
}
ul {
    list-style-type: none;
    padding: 0;
}
li {
    background: #eee;
    margin: 5px 0;
    padding: 10px;
    border-radius: 5px;
    cursor: pointer;
}
li.correct {
    background: #4caf50;
    color: #fff;
}
li.incorrect {
    background: #f44336;
    color: #fff;
}
button {
    padding: 8px 15px;
    margin-top: 15px;
    cursor: pointer;
    border: none;
    border-radius: 5px;
}
#dark-mode-toggle {
    float: right;
    background: #ffeb3b;
}
.quiz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.quiz-footer {
    text-align: center;
}