Simple button.

button.css

.wrap{
    padding: 50px;
    background: #161616;
}
.button {
    padding: 10px 20px;
    border-radius: 3px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
    background-image: linear-gradient(180deg,
        rgba(0,0,0,0),
        rgba(0,0,0,0.19)
        );
    line-height: 1em;
    font-size: 16px;
    text-align: center;
    outline: none;
    background-color: rgb(78,169,244);
    background-color: #ccc;
    color: #111;
    letter-spacing: 1px;
    font-family: 'open sans';
    text-shadow: 0 1px 0 rgba(255,255,255,0.19);
    text-decoration: none;
}

.button:active {
    box-shadow: inset 0 1px 0 rgba(0,0,0,0.3);
    text-shadow: none;

}