fix: Primer token compliance — nuke legacy CSS, fix focus/motion/a11y

- Remove entire legacy custom property system from index.css (--text, --bg, --accent, etc.)
- Remove raw heading styles that bypassed Primer typography tokens
- Fix :focus → :focus-visible with Primer outline tokens (PeriodSelector, ReportTable)
- Replace raw box-shadow focus rings with var(--focus-outline)
- Replace raw transition durations with var(--base-duration-*) and var(--base-easing-*)
- Import @primer/primitives motion tokens CSS
- Fix raw font-weight: 600 → var(--base-text-weight-semibold) in Charts.module.css
- Fix raw gap: 4px and padding: 2px 6px → var(--base-size-*) tokens
- Fix NavList.Item defaultOpen warning (only pass when SubNav exists)
- Add prefers-reduced-motion: reduce for table row/filter transitions
- Add prefers-reduced-motion already existed for FileDropzone

Author: austenstone

src/components/CsvManager.module.css

@@ -31,7 +31,7 @@
 
 .rowActions {
   display: inline-flex;
-  gap: 4px;
+  gap: var(--base-size-4, 4px);
   align-items: center;
 }
 
@@ -81,7 +81,7 @@
 }
 
 .zipInfoDesc code {
-  padding: 2px 6px;
+  padding: var(--base-size-2, 2px) var(--base-size-6, 6px);
   background: var(--bgColor-neutral-muted, #818b981f);
   border-radius: var(--borderRadius-small, 4px);
   font-size: var(--text-body-size-small, 12px);

src/components/FileDropzone.module.css

@@ -5,7 +5,8 @@
   text-align: center;
   cursor: pointer;
   background-color: var(--bgColor-default, #ffffff);
-  transition: border-color 150ms ease, background-color 150ms ease;
+  transition: border-color var(--base-duration-200, 200ms) var(--base-easing-ease, ease),
+    background-color var(--base-duration-200, 200ms) var(--base-easing-ease, ease);
 }
 
 .dropzone:hover,

src/components/InsightsSidebar.tsx

@@ -141,7 +141,7 @@ export function InsightsSidebar({
               key={id}
               href={buildPathForPage(id)}
               aria-current={activePage === id && !activeProductFilter ? 'page' : undefined}
-              defaultOpen={isUsagePage && activePage === PAGE_TYPES.USAGE}
+              {...(showSubNav ? { defaultOpen: activePage === PAGE_TYPES.USAGE } : {})}
               onClick={(event) => {
                 event.preventDefault();
                 setActivePage(id);

src/components/PeriodSelector.module.css

@@ -39,10 +39,11 @@
   line-height: 1.5;
 }
 
-.dateInput:focus {
+.dateInput:focus-visible {
   border-color: var(--borderColor-accent-emphasis, #0969da);
-  outline: none;
-  box-shadow: inset 0 0 0 1px var(--borderColor-accent-emphasis, #0969da);
+  outline: var(--focus-outline, 2px solid #0969da);
+  outline-offset: -1px;
+  box-shadow: none;
 }
 
 .customActions {

src/components/ReportTable.module.css

@@ -159,7 +159,7 @@
 
 /* Rows */
 .tr {
-  transition: background-color 0.1s;
+  transition: background-color var(--base-duration-100, 100ms) var(--base-easing-ease, ease);
 }
 
 .tr:hover {
@@ -216,12 +216,14 @@
   border: var(--borderWidth-thin, 1px) solid var(--borderColor-default, #d1d9e0);
   border-radius: var(--borderRadius-medium, 6px);
   outline: none;
-  transition: border-color 0.15s;
+  transition: border-color var(--base-duration-100, 100ms) var(--base-easing-ease, ease);
 }
 
-.filterInput:focus {
+.filterInput:focus-visible {
   border-color: var(--focus-outlineColor, #0969da);
-  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.3);
+  outline: var(--focus-outline, 2px solid #0969da);
+  outline-offset: -1px;
+  box-shadow: none;
 }
 
 .filterInput::placeholder {
@@ -326,3 +328,10 @@
   outline: none;
   cursor: pointer;
 }
+
+@media (prefers-reduced-motion: reduce) {
+  .tr,
+  .filterInput {
+    transition: none;
+  }
+}

src/components/charts/Charts.module.css

@@ -11,7 +11,7 @@
 .chartTitle {
   margin: 0;
   font-size: var(--text-body-size-medium, 14px);
-  font-weight: 600;
+  font-weight: var(--base-text-weight-semibold, 600);
   color: var(--fgColor-default, #1f2328);
 }
 

src/index.css

@@ -1,54 +1,4 @@
-:root {
-  --text: #6b6375;
-  --text-h: #08060d;
-  --bg: #fff;
-  --border: #e5e4e7;
-  --code-bg: #f4f3ec;
-  --accent: #aa3bff;
-  --accent-bg: rgba(170, 59, 255, 0.1);
-  --accent-border: rgba(170, 59, 255, 0.5);
-  --social-bg: rgba(244, 243, 236, 0.5);
-  --shadow:
-    rgba(0, 0, 0, 0.1) 0 10px 15px -3px, rgba(0, 0, 0, 0.05) 0 4px 6px -2px;
-
-  --sans: system-ui, 'Segoe UI', Roboto, sans-serif;
-  --heading: system-ui, 'Segoe UI', Roboto, sans-serif;
-  --mono: ui-monospace, Consolas, monospace;
-
-  font: 18px/145% var(--sans);
-  letter-spacing: 0.18px;
-  color-scheme: light dark;
-  color: var(--text);
-  background: var(--bg);
-  font-synthesis: none;
-  text-rendering: optimizeLegibility;
-  -webkit-font-smoothing: antialiased;
-  -moz-osx-font-smoothing: grayscale;
-
-  @media (max-width: 1024px) {
-    font-size: 16px;
-  }
-}
-
-@media (prefers-color-scheme: dark) {
-  :root {
-    --text: #9ca3af;
-    --text-h: #f3f4f6;
-    --bg: #16171d;
-    --border: #2e303a;
-    --code-bg: #1f2028;
-    --accent: #c084fc;
-    --accent-bg: rgba(192, 132, 252, 0.15);
-    --accent-border: rgba(192, 132, 252, 0.5);
-    --social-bg: rgba(47, 48, 58, 0.5);
-    --shadow:
-      rgba(0, 0, 0, 0.4) 0 10px 15px -3px, rgba(0, 0, 0, 0.25) 0 4px 6px -2px;
-  }
-
-  #social .button-icon {
-    filter: invert(1) brightness(2);
-  }
-}
+/* Layout & resets — all colors/typography come from Primer tokens */
 
 #root {
   max-width: 100%;
@@ -63,46 +13,20 @@ body {
   margin: 0;
 }
 
-h1,
-h2 {
-  font-family: var(--heading);
-  font-weight: 500;
-  color: var(--text-h);
-}
-
-h1 {
-  font-size: 56px;
-  letter-spacing: -1.68px;
-  margin: 32px 0;
-  @media (max-width: 1024px) {
-    font-size: 36px;
-    margin: 20px 0;
-  }
-}
-h2 {
-  font-size: 24px;
-  line-height: 118%;
-  letter-spacing: -0.24px;
-  margin: 0 0 8px;
-  @media (max-width: 1024px) {
-    font-size: 20px;
-  }
-}
 p {
   margin: 0;
 }
 
 code,
 .counter {
-  font-family: var(--mono);
+  font-family: var(--fontStack-monospace, ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);
   display: inline-flex;
-  border-radius: 4px;
-  color: var(--text-h);
+  border-radius: var(--borderRadius-small, 3px);
+  color: var(--fgColor-default, #1f2328);
 }
 
 code {
-  font-size: 15px;
-  line-height: 135%;
-  padding: 4px 8px;
-  background: var(--code-bg);
+  font: var(--text-codeInline-shorthand, 400 0.9285em ui-monospace, SFMono-Regular, SF Mono, Menlo, Consolas, Liberation Mono, monospace);
+  padding: var(--base-size-4, 4px) var(--base-size-8, 8px);
+  background: var(--bgColor-neutral-muted, #818b981f);
 }

src/main.tsx

@@ -2,6 +2,7 @@ import { StrictMode, useState, useMemo } from 'react';
 import { createRoot } from 'react-dom/client';
 import '@primer/primitives/dist/css/functional/themes/light.css';
 import '@primer/primitives/dist/css/functional/themes/dark.css';
+import '@primer/primitives/dist/css/base/motion/motion.css';
 import { ThemeProvider, BaseStyles } from '@primer/react';
 import App from './App';
 import { ThemeContext } from './context/theme-context';