.hide { --strip: calc(({:th}px + 10px)*0.707106781/4); }
.hide:nth-child(odd)  { background: repeating-linear-gradient(45deg, #222, #222 var(--strip), #1c1c1c var(--strip), #1c1c1c calc(var(--strip)*2)); }
.hide:nth-child(even) { background: repeating-linear-gradient(45deg, #151515, #151515 var(--strip), #111 var(--strip), #111 calc(var(--strip)*2)); }