.box{display:flex;justify-content:center;align-items:center;background:white;border:1px gray solid;cursor:pointer;box-sizing:border-box;user-select:none;font-size:var(--box-font-size)}.box.selected{opacity:0;cursor:default}.boxContainer{display:grid;position:absolute;left:0;right:0;top:0;bottom:0;--box-font-size: 1rem}.dragover{border:3px dashed gray!important}