button{
    outline: none;
    cursor: pointer;
    display: block;
    text-align: center;
    border: 2px solid #396ae5;
    padding: 1em 2em;
    box-shadow: 0px 0px 0px 4px rgba(255,255,255,.75);
    color: #2849ce;
    background-color: rgba(255,255,255,.75);
    font-family: sans-serif;
    font-size: 14px;
    font-weight: 400;
    line-height: 1;
    letter-spacing: 1px;
    text-transform: uppercase;
    letter-spacing: .5em;
    transition: all .5s ease;
}

button:focus,
button:hover{
    background-color: #FFF;
    box-shadow: 0px 0px 0px 4px #FFF;
}