* {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.btn {
    margin: 10px;
    padding: 12px 16px;
    border: none;
    background-color: #0081cb;
    font-size: 16px;
    color: #fff;
    cursor: pointer;
}

.btn span {
    cursor: pointer;
    display: inline-block;
    position: relative;
    transition: 0.5s;
}

.btn:hover span {
    padding-right: 25px;
}

.btn span:after {
    content: '>';
    position: absolute;
    margin-left: 2px;
    transition: 0.5s;
    opacity: 0;
    top: 0;
    right: -20px;   
}

.btn:hover span:after {
    opacity: 1;
    right: 0;
}