a.btn:hover, a.btn:active, a.btn:visited {
    color: #fff;
    text-decoration: none;
}
a:hover {
    color: #fff;
}
a:hover, a:focus {
    text-decoration: underline;
}
a:active, a:hover {
    outline: 0;
}
a.btn {
    display: block;
    width: 100%;
    max-width: 278px;
    height: 38px;
    line-height: 38px;
    border-radius: 19px;
    background: #000;
    color: #fff;
    position: relative;
    font-size: 16px;
    text-align: center;
    margin: 30px auto 0;
}

a.btn::after {
    content: '>';
    position: absolute;
    display: block;
    top: -4%;
    right: 4%;
    transform: scale(.8,1.6);
}
a::after {
    content: "";
    background-repeat: no-repeat;
}
::before, ::after {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
}