body {
    margin: 0;
    padding: 0;

}

.btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform translate(-50, -50);
}

.btn-group .button {
    background-color: green;
    border: 1px solid green;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    font-size: 16px;
    cursor: pointer;
    width: 150px;
    display: block;
    transition-duration: 0.4s;
    display: block;
    width: 50px;
    border: 10px;
    margin-bottom: 8px;
}

.btn-group .button:hover {
    background-color: #3e8e41;
}

.button1 {
    border-radius: 12px;
}

.button2 {
    border-radius: 12px;
    

}

a:visited {
    color: palegoldenrod;
    text-decoration: none;
}