feat: redesign entire portfolio with bold modern dark theme

Complete visual overhaul of all pages and components with generous spacing,
bold typography, hover effects, gradient accents, and section differentiation.
Hero features animated terminal mockup and gradient text. Cards use hover
transforms with brand-colored shadows. CTAs use gradient backgrounds.
All i18n keys, data structures, SEO meta, and composable logic preserved.

app/components/TechBadge.vue

@@ -57,18 +57,22 @@ const levelColor = computed(() => {
 </script>
 
 <template>
-  <div class="flex items-center gap-2" itemscope itemtype="https://schema.org/ComputerLanguage">
+  <div
+    class="inline-flex items-center gap-2 px-3 py-1.5 rounded-lg bg-gray-50 dark:bg-gray-800 border border-gray-200 dark:border-gray-700/50 transition-colors hover:border-brand-500/30"
+    itemscope
+    itemtype="https://schema.org/ComputerLanguage"
+  >
     <NuxtImg
       v-if="showImage && techData.image"
       :src="techData.image"
       :alt="`${techData.name} logo`"
-      width="24"
-      height="24"
+      width="20"
+      height="20"
       loading="lazy"
       class="shrink-0"
       itemprop="image"
     />
-    <span class="text-sm font-medium" itemprop="name">{{ techData.name }}</span>
+    <span class="text-sm font-medium text-gray-700 dark:text-gray-300" itemprop="name">{{ techData.name }}</span>
     <UBadge v-if="showLevel" :color="levelColor" variant="subtle" size="xs">
       {{ techData.level }}
     </UBadge>