demo-container { display: block; border: 2px solid rgb(189, 189, 189); padding: 25px 10px 10px; border-radius: 3px; width: 240px; overflow: auto; }
demo-object { display: block; background-color: rgb(224, 255, 253); contain: size; }
block-block { border: 4px dotted rgb(255, 0, 0); background: rgb(255, 255, 168); margin: 0px 0px 10px; }
.element { contain-intrinsic-size: 100px; }