The code below makes all elements in the device container to be block level, that's not a good idea I suppose. ```scss .device, .device * { &, &::before, &::after { box-sizing: border-box; display: block; } } ``` > https://github.com/picturepan2/devices.css/blob/f8a06c18ea14654ba379b409eaa08aed70d87375/src/_reset.scss#L3