/* button */
input[type="submit"].dem-button,
a.dem-button,
.dem-button{
    color: #777674;
    font-weight: bold;
    text-shadow: rgba(255,255,255,.5) 1px 1px, rgba(100,100,100,.3) 3px 7px 3px;
    padding: 1em 2em;
    border-radius: 3px / 100%;
    background-color: rgba(0,0,0,0);
    background-image:
    linear-gradient(45deg, rgba(255,255,255,.0) 30%, rgba(255,255,255,.8), rgba(255,255,255,.0) 70%),
    linear-gradient(to right, rgba(255,255,255,1), rgba(255,255,255,0) 20%, rgba(255,255,255,0) 90%, rgba(255,255,255,.3)),
    linear-gradient(to right, rgba(125,125,125,1), rgba(255,255,255,.9) 45%, rgba(125,125,125,.5)),
    linear-gradient(to right, rgba(125,125,125,1), rgba(255,255,255,.9) 45%, rgba(125,125,125,.5)),
    linear-gradient(to right, rgba(223,190,170,1), rgba(255,255,255,.9) 45%, rgba(223,190,170,.5)),
    linear-gradient(to right, rgba(223,190,170,1), rgba(255,255,255,.9) 45%, rgba(223,190,170,.5));
    background-repeat: no-repeat;
    background-size: 200% 100%, auto, 100% 2px, 100% 2px, 100% 1px, 100% 1px;
    background-position: 200% 0, 0 0, 0 0, 0 100%, 0 4px, 0 calc(100% - 4px);
    box-shadow: rgba(0,0,0,.5) 3px 10px 10px -10px;
}

input[type="submit"].dem-button:hover,
a.dem-button:hover,
.dem-button:hover {
  transition: background .5s linear;
  background-position: -200% 0, 0 0, 0 0, 0 100%, 0 4px, 0 calc(100% - 4px);
}