.btn-1 {
    display: block;
    width: fit-content;
    margin: 0 auto 120px;
    padding: 20px;
    width: 90%;
    max-width: 280px;
    border: solid 1px #000;
    font-size: 18px;
    text-align: center;
}
.btn-1:hover {
    background: #000;
    color: #fff;
}