feat(website): responsive / mobile layouts

Make the marketing site mobile-friendly across every page and section.
Desktop appearance is unchanged; all breakpoint logic targets <=768px.

- Fluid section padding via clamp(); equal grids use auto-fit/minmax,
  asymmetric grids stack to one column via scoped-CSS media queries
- Nav: real hamburger menu on mobile (links, lang toggle, login, CTA)
- ProductMockup: scales the whole dashboard to fit (zoom) instead of
  reflowing its internals into a tall stack
- Lower oversized heading clamp() minimums so titles no longer overflow
  at ~390px (hero, page headers, final CTA, brand cover/chapter)
- HowItWorks: row-gap when steps stack so node markers clear the text
- Compare + partners tables: stacked rows now label each value with its
  column (Dezky vs hyperscaler / CSP) instead of an ambiguous header
- Footer columns, tiers, calculator and tables stack cleanly on mobile

apps/website/components/landing/Whitelabel.vue

@@ -30,12 +30,12 @@ const partnerCards = computed(() =>
 
 <template>
   <section id="whitelabel" :style="{ background: sectionBg, color: t.fg, borderTop: `1px solid ${t.border}`, borderBottom: `1px solid ${t.border}`, scrollMarginTop: '72px' }">
-    <LandingContainer pad="120px 64px">
+    <LandingContainer pad="clamp(56px, 8vw, 120px) clamp(20px, 5vw, 64px)">
       <LandingSectionLabel :label="copy.whitelabel.label" />
-      <div :style="{ display: 'grid', gridTemplateColumns: '1.2fr 1fr', gap: '80px', alignItems: 'start' }">
+      <div class="whitelabel-grid" :style="{ display: 'grid', gap: 'clamp(40px, 5vw, 80px)', alignItems: 'start' }">
         <div>
           <h2 :style="{ fontFamily: '\'Inter Tight\', sans-serif', fontWeight: 600, fontSize: 'clamp(36px, 4.4vw, 64px)', letterSpacing: '-0.032em', lineHeight: 1.0, margin: 0, textWrap: 'balance', color: t.fg }">{{ copy.whitelabel.heading }}</h2>
-          <div :style="{ marginTop: '32px', maxWidth: '520px' }">
+          <div :style="{ marginTop: '32px', maxWidth: 'min(100%, 520px)' }">
             <p :style="{ fontFamily: '\'Inter\', sans-serif', fontSize: '20px', lineHeight: 1.5, maxWidth: '640px', color: t.fgMuted, margin: 0, textWrap: 'pretty' }">{{ copy.whitelabel.lede }}</p>
           </div>
           <div :style="{ marginTop: '32px', display: 'flex', flexDirection: 'column', gap: '12px' }">
@@ -65,3 +65,14 @@ const partnerCards = computed(() =>
     </LandingContainer>
   </section>
 </template>
+
+<style scoped>
+.whitelabel-grid {
+  grid-template-columns: 1.2fr 1fr;
+}
+@media (max-width: 768px) {
+  .whitelabel-grid {
+    grid-template-columns: 1fr;
+  }
+}
+</style>