* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
dialog {
    padding: 10px;
    -webkit-box-shadow: 0px 14px 5px -10px rgba(0,0,0,0.36);
    box-shadow: 0px 14px 5px -10px rgba(0,255,0,0.36);
    border-radius: 0.5rem;
}

dialog::backdrop {
    background: rgba(255,0,0,.25);
}