fix: mobile landing page text overflow clipping

Reduce section/card padding on mobile, allow mock node and chat text to
wrap, and add flex-wrap to the brand equation so nothing overflows the
viewport edge.

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

frontend/src/styles/landing.css

@@ -46,6 +46,7 @@
 .landing-page-content {
   position: relative;
   z-index: 1;
+  overflow-x: hidden;
 }
 
 /* ---- NAVIGATION ---- */
@@ -809,7 +810,7 @@
   border-radius: 6px;
   font-size: 0.6rem;
   font-family: 'IBM Plex Sans', sans-serif;
-  white-space: nowrap;
+  overflow-wrap: anywhere;
 }
 
 .landing-mock-node.start {
@@ -858,6 +859,8 @@
 
 .landing-mock-chat-line .text {
   color: #848b9b;
+  overflow-wrap: anywhere;
+  min-width: 0;
 }
 
 .landing-mock-chat-line.doc .label {
@@ -1412,6 +1415,18 @@
 /* ---- RESPONSIVE ---- */
 @media (max-width: 900px) {
 
+  .landing-page section {
+    padding: 3rem 1rem;
+  }
+
+  .landing-section-inner {
+    max-width: 100%;
+  }
+
+  .landing-step-card {
+    padding: 1.25rem;
+  }
+
   .landing-problem-grid,
   .landing-steps-container,
   .landing-features-grid,
@@ -1463,15 +1478,28 @@
     padding: 8rem 1.5rem 4rem;
   }
 
+  .landing-equation-section {
+    padding: 3rem 1rem;
+  }
+
   .landing-brand-equation {
     font-size: 1.25rem;
     gap: 0.5rem;
+    flex-wrap: wrap;
   }
 
   .landing-eq-item {
     padding: 0.35rem 0.75rem;
   }
 
+  .landing-testimonial-section {
+    padding: 3rem 1rem;
+  }
+
+  .landing-cta-section {
+    padding: 3rem 1rem;
+  }
+
   .landing-cta-email-form {
     flex-direction: column;
   }