.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f2f2f2;
}

h1 {
    text-align: center;
}

.card {
    width: 400px;
    height: 350px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0px 3px 10px rgba(0, 0, 0, 0.2);
}

.card-header {
    padding: 20px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
}

.card-body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.answer {
    margin: 10px;
    padding: 10px;
    text-align: center;
    background-color: #f2f2f2;
    border-radius: 5px;
    cursor: pointer;
}

.answer:hover {
    background-color: #d9d9d9;
}

.correct {
    background-color: #a6f0c6;
}

.incorrect {
    background-color: #f0a6a6;
}

.card-footer {
    padding: 20px;
    text-align: center;
}

#next-btn {
    background-color: #008CBA;
    color: white;
    font-size: 18px;
    font-weight: bold;
    border: none;
    border-radius: 5px;
    padding: 10px 20px;
    cursor: pointer;
}

#next-btn:hover {
    background-color: #006B87;
}