feat: squircle corners#14
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Add continuous-curvature (squircle) corners as progressive enhancement on finite-radius UI surfaces (header chrome, panels, buttons, segmented controls, badges, sliders). Introduces a --corner: squircle token in :root (global stylesheet) — a custom property, so it inherits into scoped Svelte component styles — and applies corner-shape: var(--corner) next to each finite border-radius rule. corner-shape is Chromium-only as of mid-2026; Safari/WebKit and Firefox ignore it and keep the existing border-radius arc, so this is zero visual regression. Pills (border-radius: 999px/9999px), circles (50%), and the user-controlled icon-artwork radius (var(--bg-radius)) are intentionally left untouched. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds continuous-curvature (squircle) corners as a progressive enhancement across motifmint's finite-radius UI surfaces — header chrome, the studio panels/buttons/segmented controls, language switcher, nav view switch, compare-slider/ASCII labels, and code/kbd chips.
How
--corner: squircletoken in:root(global stylesheet inLayout.astro). Because a custom property is inherited, the token reaches scoped Svelte component styles too.corner-shape: var(--corner);added next to each finiteborder-radiusrule. The existingborder-radiusstill sizes the corner and is the fallback.Zero regression
corner-shapeis Chromium-only as of mid-2026 — Safari/WebKit and Firefox ignore it and keep the plainborder-radiusarc. Pure progressive enhancement, no visual change on non-Chromium engines.Intentionally left round
border-radius: 999px/9999px)border-radius: 50%)var(--bg-radius)) — that's the design output, not chrome.Mirrors the squircle standard already shipped in CVERInc/cver.net and liquidframe.
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