body {
    margin: 0;
    display: flex;
    flex-direction: column; 
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background-color: #2c3e50;
    color: white;
    font-family: sans-serif;
}

a, a:visited {
    color: cyan;  
    display: flex;
    flex-direction: column;
    text-decoration: none;
    margin-top: 10px;
    font-size: larger;
}

a:hover {
    color: #3498db;
    text-decoration: underline;
}

a:active {
    color: #166fab;
    text-decoration: underline;
}