body {
    background-color: #18414B;
    color: white;
}


a:link, a:visited {
    background-color: #18414B;
    color: white;
    font-size: 20px;
    padding: 15px 25px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    border: 4px solid #148ba9;
    font-weight: bold;
    border-radius: 80px;
}

a:hover, a:active {
    background-color: #148ba9;
}