body {
        font-family: Arial, sans-serif;
        background-color: #f5f7fa;
        margin: 0;
        margin: 40px;
    }

    .container {
        display: flex;
        justify-content: space-around;
        text-align: center;
        padding: 15px;
    }

    .card {
        width: 30%;
        padding: 20px;
    }

    .icon {
        font-size: 60px;
        color: #1e73e8;
        margin-bottom: 20px;
    }

    h2 {
        font-size: 22px;
        margin-bottom: 10px;
        color: #333;
    }

    p {
        color: #666;
        margin-bottom: 15px;
    }

    ul {
        list-style: none;
        padding: 0;
    }

    ul li {
        margin: 6px 0;
    }

    ul li a {
        text-decoration: none;
        color: #1e73e8;
        font-weight: 500;
        
    }

    ul li a:hover {
        text-decoration: underline;
    }

    .java-link {
        color: #1e73e8;
        text-decoration: none;
        font-weight: 500;
    }

    .copy_right {
        font-size: 10px;
        margin-left: 60px;
    }