fix(landing): repair mobile layout

promo/landing/src/index.css

@@ -579,11 +579,34 @@ h1 {
 }
 
 @media (max-width: 860px) {
+  html,
+  body,
+  #root {
+    height: auto;
+    min-height: 100%;
+    overflow: visible;
+  }
+
+  html {
+    overflow-x: clip;
+  }
+
+  body,
+  #root {
+    min-height: 100svh;
+  }
+
   .landing-shell {
+    align-content: start;
+    align-items: stretch;
     grid-template-columns: 1fr;
-    grid-template-rows: auto minmax(0, 1fr);
+    grid-template-rows: auto auto;
     gap: 18px;
+    height: auto;
+    min-height: 100svh;
+    max-height: none;
     padding: 124px 18px 18px;
+    overflow: clip;
   }
 
   .hero-copy {
@@ -624,9 +647,9 @@ h1 {
   }
 
   .device-card {
-    min-height: 0;
+    height: clamp(350px, 68vw, 470px);
-    height: 100%;
+    min-height: clamp(350px, 68vw, 470px);
-    max-height: 48vh;
+    max-height: none;
     border-radius: 32px;
   }
 
@@ -636,7 +659,8 @@ h1 {
   }
 
   .capture-frame {
-    width: min(66%, 380px);
+    width: min(58%, 270px);
+    height: auto;
   }
 
   .slide-panel {
@@ -717,7 +741,8 @@ h1 {
   }
 
   .device-card {
-    max-height: 42vh;
+    height: 350px;
+    min-height: 350px;
   }
 
   .window-chrome {
@@ -731,7 +756,7 @@ h1 {
   }
 
   .capture-frame {
-    width: 72%;
+    width: min(58%, 240px);
     border-radius: 18px;
   }