.button {
 border-style: none;
    border-color: inherit;
    border-width: medium;
    background: #3a7999;
    color: #f2f2f2;
    padding: 10px;
    font-size: 18px;
    border-radius: 5px;
    position: relative;
    box-sizing: border-box;
    transition: all 500ms ease;
    top: -10px;
    left: 3px;
    height: 45px;
    width: 120px;
    
}
.button:hover {
background: rgba(0,0,0,0);
 color: #3a7999;
 box-shadow: inset 0 0 0 3px #3a7999;
}