feat: self-host Newsreader font, remove Google Fonts CDN

Local woff2 files for latin + latin-ext (DE/FR support).
No external font requests for privacy/GDPR compliance.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

assets/css/custom.css

@@ -1,6 +1,43 @@
 /* Internet for Kids — Newsreader typography (darioamodei.com-inspired)
    Warm, literary, research-publication feel */
 
+/* Local Newsreader font — latin */
+@font-face {
+  font-family: 'Newsreader';
+  font-style: normal;
+  font-weight: 400 700;
+  font-display: swap;
+  src: url(/fonts/newsreader/newsreader-latin.woff2) format('woff2');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+/* latin-ext (DE umlauts, FR accents) */
+@font-face {
+  font-family: 'Newsreader';
+  font-style: normal;
+  font-weight: 400 700;
+  font-display: swap;
+  src: url(/fonts/newsreader/newsreader-latin-ext.woff2) format('woff2');
+  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
+}
+/* italic latin */
+@font-face {
+  font-family: 'Newsreader';
+  font-style: italic;
+  font-weight: 400 500;
+  font-display: swap;
+  src: url(/fonts/newsreader/newsreader-italic-latin.woff2) format('woff2');
+  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
+}
+/* italic latin-ext */
+@font-face {
+  font-family: 'Newsreader';
+  font-style: italic;
+  font-weight: 400 500;
+  font-display: swap;
+  src: url(/fonts/newsreader/newsreader-italic-latin-ext.woff2) format('woff2');
+  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF;
+}
+
 :root {
   --ifk-font: 'Newsreader', 'Times New Roman', serif;
   --ifk-text: #1c1917;

layouts/partials/extend-head.html

@@ -1,8 +1,3 @@
-{{/* Newsreader serif font (Dario Amodei-inspired typography) */}}
-<link rel="preconnect" href="https://fonts.googleapis.com">
-<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
-<link href="https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,400;1,6..72,500&display=swap" rel="stylesheet">
-
 {{/* Structured data for SEO + AI search */}}
 {{ partial "structured-data.html" . }}