body{
    background-color: #171717;
}
.btnth {
    border-radius: 20px;
    background-color: #ff8606;
    color: white;
    font-size: 1.3rem;
    font-weight: bolder;
}
.btnth {
cursor: pointer;
display: inline-block;
position: relative;
transition: 0.5s;
}

.btnth:after {
content: "»";
position: absolute;
opacity: 0;
top: 5px;
right: -20px;
transition: 0.5s;
}

.btnth:hover {
padding-right: 24px;
padding-left: 8px;
}

.btnth:hover:after {
opacity: 1;
right: 10px;
}