style.css

body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.container {
    text-align: center;
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.cards {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 20px;
}

.card {
    background-color: #007bff;
    color: #fff;
    padding: 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 24px;
    transition: background-color 0.3s;
    width: 60px;
    text-align: center;
}

.card:hover {
    background-color: #0056b3;
}

.selected-card {
    margin-top: 30px;
}

#selectedValue {
    font-size: 48px;
    font-weight: bold;
    margin-top: 10px;
}