a.toggler {
    color: #dfdfdf;
    text-shadow: 2px 2px 1px #626262;
    background: grey;
    cursor: pointer;
    border: 2px solid black;
    border-right-width: 15px;
    padding: 0 5px;
    border-radius: 5px;
    text-decoration: none;
    transition: all .5s ease;
}
a.toggler.off {
    color: black;
    text-shadow: 2px 2px 1px white;
    background: white;
    border-right-width: 2px;
    border-left-width: 15px;
}