MARKHOR Block Addons ships a self-contained Container block that looks and behaves identically on any theme — classic or block:
- Per-device flex layout (direction, justify, align, wrap, gap) for desktop / tablet / mobile.
- Boxed max-width or full width, per device.
- Padding, margin and min-height, per device.
- Border style / width / color / radius, per device.
- Background color, gradient or image — with light/dark colour pairs and optional lazy loading (Interactivity API).
- Box-shadow with dark-mode override.
- z-index / overflow / position, responsive visibility, semantic HTML tag picker, custom
data-*attributes.
CSS is generated once at save time, cached in post meta, and printed inline in the head — zero front-end parsing.