<button>
  <div></div>
</button>

button {
    position: absolute;
    top: 50%;
    right: 0;
    left: 0;
    display: block;
    width: 240px;
    padding: 40px;
    margin: 0 auto;
    border: 0;
    cursor: pointer;
    border-radius: 2px;
    transform: translateY(-50%);
    box-shadow: 0 10px 20px -5px #94a6af;
    overflow: hidden;
}

button:before, button:after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

button:before {
    transform: scale(1);
    background-image: url('https://himalayasingh.github.io/button-hover-effect-1/img/bg.jpg');
    background-size: cover;
    transition: 0.3s ease transform;
    z-index: 1;
}

button:after {
    background-color: #000;
    opacity: 0.16;
    z-index: 2;
}

button div {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 3;
}

button div:before, button div:after {
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    color: #fff;
    font-size: 30px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    font-weight: bold;
    line-height: 1;
    text-align: center;
    padding: 25px 0;
    transition: 0.3s ease all;
}

button div:before {
    content: "ZORNET";
    letter-spacing: 0;
    opacity: 1;
    transform: scale(1);
}

button div:after
{
    content: "KOSTEN";
    letter-spacing: -10px;
    transform: scale(0);
    opacity: 0;
}

button:hover:before {
    transform: scale(1.1);
}

button:hover div:before
{
    letter-spacing: 3px;
    opacity: 0;
    transform: scale(4);
}

button:hover div:after {
    letter-spacing: 0;
    opacity: 1;
    transform: scale(1);
}

a {
    position: absolute;
    top: 80%;
    right: 0;
    left: 0;
    display: block;
    width: 160px;
    color: #ff0000;
    text-align: center;
    font-size: 16px;
    font-family: Helvetica, arial;
    font-weight: bold;
    text-decoration: none;
    line-height: 1;
    padding: 16px;
    margin: 0 auto;
    border: 2px solid #ff0000;
    border-radius: 2px;
    z-index: 1;
}