.scalloped-bottom {
    background-color: transparent;
    background-image: radial-gradient(circle at 10px 10px, transparent 0, transparent 9px, white 10px);
    background-size: 20px 20px;
    background-repeat: repeat-x;
    background-position: bottom;
    height: 10px;
    transform: rotate(180deg);
    filter: drop-shadow(0px -2px 3px rgba(0,0,0,0.08));
}