Sumi is a minimal Astro theme built around ink, washi paper and generous negative space. Dual light and dark themes, zero client JavaScript on article pages, and a WebGL ink simulation on the front page.https://sumi.p4ni.com/enhttps://sumi.p4ni.com/blog/the-grammar-of-negative-space/https://sumi.p4ni.com/blog/the-grammar-of-negative-space/Emptiness in a layout is not the absence of design. It is the part of the design that tells the reader where to look, how fast to move, and when to stop.Tue, 28 Jul 2026 00:00:00 GMTkpabdesigncrafthttps://sumi.p4ni.com/blog/ink-in-the-browser/https://sumi.p4ni.com/blog/ink-in-the-browser/How a fluid simulation ends up on the front page of a blog theme without wrecking the performance budget — half-float buffers, a capped pixel ratio, and knowing when to stop drawing.Tue, 14 Jul 2026 00:00:00 GMTkpabwebglastroperformancehttps://sumi.p4ni.com/blog/the-case-for-zero-javascript/https://sumi.p4ni.com/blog/the-case-for-zero-javascript/An article page is a solved problem. Every kilobyte of script you add to one is a bet that you can rebuild the browser's own behaviour better than the browser does.Tue, 30 Jun 2026 00:00:00 GMTkpabperformanceastrocrafthttps://sumi.p4ni.com/blog/reading-at-the-speed-of-paper/https://sumi.p4ni.com/blog/reading-at-the-speed-of-paper/Screens taught us to skim. A few old typographic constraints — measure, leading, contrast, and a serif that was drawn for text — can hand the page back its pace.Thu, 11 Jun 2026 00:00:00 GMTkpabtypographydesignhttps://sumi.p4ni.com/blog/six-centuries-of-sumi-e/https://sumi.p4ni.com/blog/six-centuries-of-sumi-e/Ink painting is a medium with no undo. What a fifteenth-century monk understood about committing to a stroke turns out to apply fairly directly to building things.Fri, 22 May 2026 00:00:00 GMTkpabcraftdesignhttps://sumi.p4ni.com/blog/notes-on-vermilion/https://sumi.p4ni.com/blog/notes-on-vermilion/One accent colour, used sparingly, does more work than a palette. A short history of the red that shows up on gates, seals, and — here — about four elements per page.Fri, 08 May 2026 00:00:00 GMTkpabcolourdesign