Fix CRÍTICO: Cambiar --font-primary de system-ui a Poppins en style.css

Problema:
style.css sobrescribía --font-primary con system-ui, anulando la configuración de Poppins en fonts.css y variables.css.

Orden de carga (el último gana):
1. fonts.css (priority 1): --font-primary: 'Poppins'
2. variables.css (priority 5): --font-family-base: 'Poppins'
3. style.css (priority 5): --font-primary: system-ui ← SOBRESCRIBÍA TODO

Resultado: body usaba system-ui en lugar de Poppins

Solución:
1. Cambiar style.css líneas 7-9:
   - --font-primary: 'Poppins', sans-serif (era system-ui)
   - --font-secondary: 'Poppins', sans-serif (era system-ui)
   - --font-headings: 'Poppins', sans-serif (era Avenir)

2. Version bump style.css: 1.0.3 → 1.0.4 (cache busting)

Archivos modificados:
- wp-content/themes/apus-theme/assets/css/style.css
- wp-content/themes/apus-theme/inc/enqueue-scripts.php

Corrige issue #121 (TOC Sidebar font-family)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

wp-content/themes/apus-theme/assets/css/style.css

@@ -3,11 +3,10 @@
    ========================================================================== */
 
 :root {
-  /* Typography - Using system fonts by default (defined in fonts.css) */
-  /* These will be overridden by fonts.css custom properties */
-  --font-primary: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
-  --font-secondary: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
-  --font-headings: Avenir, "Avenir Next LT Pro", Montserrat, Corbel, "URW Gothic", source-sans-pro, sans-serif;
+  /* Typography - Poppins como fuente principal (loaded via Google Fonts) */
+  --font-primary: 'Poppins', sans-serif;
+  --font-secondary: 'Poppins', sans-serif;
+  --font-headings: 'Poppins', sans-serif;
   --font-code: "Consolas", "Monaco", "Courier New", Courier, monospace;
 
   /* Font Sizes - Fluid typography scale */

wp-content/themes/apus-theme/inc/enqueue-scripts.php

@@ -95,7 +95,7 @@ function apus_enqueue_main_stylesheet() {
         'apus-main-style',
         get_template_directory_uri() . '/assets/css/style.css',
         array('apus-variables'),
-        '1.0.3', // Incremented again to bypass browser cache
+        '1.0.4', // Fix: Cambiar --font-primary a Poppins (era system-ui)
         'all'
     );
 }