body {
        font-family: Arial, sans-serif;
        text-align: center; 
        background-color: #3eadf7;
        margin: 0;
        padding: 0;
    }

    header h1 {
        margin-top: 20px;
        background-color: #fafcfb;
        display: inline-block;
        padding: 10px 20px;
        border: 2px solid black;
        border-radius: 6px;
    }

    
    nav {
        margin-top: 20px;
        background-color: #000000;
        display: inline-block;
        padding: 10px 20px;
        border: 2px solid #fafcfb;
        border-radius: 6px;
    }

    nav a {
        text-decoration: none;
        margin: 0 10px;
        font-weight: bold;
        color: black;

        background-color: #fafcfb;   
        padding: 8px 15px;           
        border: 2px solid black;     
        border-radius: 6px;          
        display: inline-block;       
    }

    .three-columns {
        display: flex;
        justify-content: center;
        gap: 20px;
        margin-top: 30px;
    }

    .column {
        width: 25%;
        background-color: #ffffff;
        padding: 15px;
        border-radius: 8px;
        text-align: left;
    }

    .column h2 {
        text-align: center;
    }

    footer {
        margin-top: 20px;
        background-color: #fafcfb;
        display: inline-block;
        padding: 10px 20px;
        border: 2px solid black;
        border-radius: 6px;
    }