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

h1 {
    text-align: center;
    color: #333;
}

.group-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    width: 100%;
    max-width: 1200px;
}

.group-frame {
    background-color: #fff;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    text-align: center;
}

.group-frame a {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 15px;
    color: #fff;
    background-color: #007bff;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
}

.group-frame a:hover {
    background-color: #0056b3;
}

@media (max-width: 768px) {
    .group-container {
        grid-template-columns: 1fr;
    }
}