#english-test-container {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

#english-test-container h1 {
    text-align: center;
    color: #2c3e50;
}

#quiz-container {
    background-color: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.question {
    margin-bottom: 20px;
}

#english-test-container button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s;
}

#english-test-container button:hover {
    background-color: #2980b9;
}

.feedback {
    margin-top: 10px;
    font-weight: bold;
}

.correct {
    color: #27ae60;
}

.incorrect {
    color: #c0392b;
}

#result {
    text-align: center;
    font-size: 24px;
    margin-top: 20px;
}

#stats {
    margin-top: 20px;
}

#chart {
    width: 100%;
    height: 200px;
}

.level-buttons {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.level-buttons button {
    margin: 0 10px;
}

.active {
    background-color: #2c3e50;
}