Yes. Presets use named utility classes; arbitrary values use a has-forwp-*-custom class with a CSS variable (for example --forwp-padding-top-mobile: 150px) instead of inline styles.

No. The plugin extends blocks that already support spacing, typography, and alignment — such as Heading, Paragraph, Group, and List — via sidebar controls.

No. Output is limited to utility CSS classes and CSS variables. A single generated stylesheet handles responsive rules — no front-end script dependency.

Spacing and font-size presets are read from the active theme’s theme.json. Breakpoints can be defined in settings.custom.breakpoints; when present, they override plugin defaults and lock conflicting admin fields.

Not yet. The plugin has not been submitted to the official WordPress.org directory. Install and review the source from the GitHub repository.

Block content remains intact. Responsive utility classes and variables stop applying, so layouts may look different — but no block markup is destroyed. This is by design for a safe fallback.

4WP Responsive adds Desktop, Tablet, and Mobile controls for spacing, visibility, font-size, and text alignment on core Gutenberg blocks — through the block inspector, without custom blocks.

By default under wp-content/uploads/4wp-responsive/, cached with a content hash. You can override the storage path in Settings → 4WP Responsive if your deployment requires a fixed location.