.mud-paper.mud-elevation-1::before,
.mud-paper.mud-elevation-2::before,
.mud-paper.mud-elevation-3::before {
    content: '';
    position: absolute;
    inset: 3px;
    pointer-events: none;
    z-index: 1;
    background:
        /* top-left */
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 0 0 / 12px 1.5px no-repeat,
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 0 0 / 1.5px 12px no-repeat,
        /* top-right */
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 100% 0 / 12px 1.5px no-repeat,
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 100% 0 / 1.5px 12px no-repeat,
        /* bottom-left */
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 0 100% / 12px 1.5px no-repeat,
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 0 100% / 1.5px 12px no-repeat,
        /* bottom-right */
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 100% 100% / 12px 1.5px no-repeat,
        linear-gradient(rgba(200,191,179,0.45), rgba(200,191,179,0.45)) 100% 100% / 1.5px 12px no-repeat;
    border-radius: 4px;
}