.substrate {
    box-shadow:
        inset 1px 0 0 rgba(255,255,255,0.15),
        inset -1px 0 0 rgba(255,255,255,0.20),
        inset 0 1px 0 rgba(255,255,255,0.09),
        inset 0 -1px 0 rgba(255,255,255,0.05) !important;
}