.callback-btn {
  display: block;
    font-size: 14px;
    font-weight: 400;
    height: 32px;
    min-width: 100px;
    text-align: center;
    line-height: 12px;
    border-radius: 20px;
    border: 1px solid #000;
    display: -webkit-box;
    display: flex;
    -webkit-box-align: center;
    align-items: center;
    -webkit-box-pack: center;
    justify-content: center;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    padding: 0 10px;
}

.callback-btn:hover {
 cursor:pointer; 
}