.b-simplebtn {
    position: relative;
    display: block;
    text-align: center;
    border-radius: 5px;
    transition: .3s;
    padding: 10px;
    width: 100%;
    max-width: 350px;
    text-decoration: none;
    border: 1px solid rgb(255, 255, 255);
    margin: 2rem auto 1rem;
}
.b-simplebtn .b-simplebtn-text {
    color: rgb(255, 255, 255);
    font-size: 1.5rem;
    line-height: 40px;
    font-weight: bold;
}
.b-simplebtn:hover {
    transition: .3s;
    opacity: .7;
}
.b-simplebtn::after {
    content: '';
    width: 18px;
    height: 18px;
    border-top: solid 2px #ffffff;
    border-right: solid 2px #ffffff;
    -ms-transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
    position: absolute;
    top: 50%;
    right: 1.5rem;
    margin-top: -8px;
}