.button {
    display: inline-block;
    padding: 14px 140px;
    background-color: #5dca88;
    border: none;
    border-radius: 3px;
    color: white;
    margin: 10px auto;
    cursor: pointer;
}

.modal-window{
    display: none;
    position: absolute;
    top: 20%;
    left: 34%;
    background-color: #e6ecf0;
    padding: 20px 0 40px;
    border-radius: 10px;
    width: 450px;
    height: auto;
    text-align: center;
}