body {
    font-family: Arial, sans-serif;
    background-color: #f5f5f5;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.quiz-container {
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    width: 100%;
    max-width: 600px;
    text-align: center;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

#quiz-header {
    margin-bottom: 20px;
}

#question-container {
    margin-bottom: 20px;
}

#question-text {
    margin-bottom: 15px;
    color: #444;
}

#options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    background-color: #f9f9f9;
    cursor: pointer;
    transition: background-color 0.3s;
}

.option:hover {
    background-color: #e9e9e9;
}

.option.selected {
    background-color: #4CAF50;
    color: white;
}

.option.incorrect {
    background-color: #f44336;
    color: white;
}

#feedback {
    margin: 15px 0;
    font-weight: bold;
    min-height: 20px;
}

#feedback.correct {
    color: #4CAF50;
}

#feedback.incorrect {
    color: #f44336;
}

#next-btn {
    padding: 10px 20px;
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

#next-btn:hover {
    background-color: #0b7dda;
}

#quiz-selector {
    margin-top: 20px;
}

.quiz-btn {
    margin: 5px;
    padding: 10px 15px;
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.quiz-btn:hover {
    background-color: #0b7dda;
}

.hidden {
    display: none;
}