.btn_trddd {
    width: 180px;
    text-align: center;
    margin: 0 auto;
    display: inline-block;
    border: none;
    border-radius: .3em;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.1), inset 0 -0.25em 0 rgba(0, 0, 0, 0.25), 0 0.25em 0.25em rgba(0, 0, 0, 0.05);
    cursor: pointer;
    font-weight: 300;
    line-height: 1.5;
    letter-spacing: 1px;
    padding: .5em 1.5em .75em;
    position: relative;
    text-decoration: none;
    text-shadow: 0 1px 1px rgba(255, 255, 255, 0.25);
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none; 
}
.btn_trddd:active {
    outline: none;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.2), inset 0 2px 0 rgba(255, 255, 255, 0.1), inset 0 0.25em 0.5em rgba(0, 0, 0, 0.05);
    margin-top: .25em;
    padding-bottom: .5em; 
}