.c-icon {
    font-size: 0;
    line-height: 0;
    background: url(../images/icon.png) no-repeat;
}

.c-user {
    width: 17px;
    height: 18px;
    background-position: 0 -312px;
}

.c-password {
    width: 17px;
    height: 18px;
    background-position: -32px -312px;
}