diff --git a/public/robot_kinematics_three_test.html b/public/robot_kinematics_three_test.html
index 8c29ce8..c48d7eb 100644
--- a/public/robot_kinematics_three_test.html
+++ b/public/robot_kinematics_three_test.html
@@ -27,7 +27,7 @@
       html,
       body {
         width: 100%;
-        min-height: 100%;
+        height: 100%;
       }
 
       body {
@@ -39,6 +39,7 @@
           sans-serif;
         color: var(--text);
         background: var(--bg);
+        overflow: hidden;
       }
 
       button,
@@ -129,17 +130,24 @@
       .app {
         display: grid;
         grid-template-columns: minmax(336px, 420px) minmax(0, 1fr);
-        min-height: 100dvh;
+        height: 100dvh;
+        min-height: 0;
+        overflow: hidden;
       }
 
       .side {
         display: flex;
         flex-direction: column;
         gap: 16px;
+        min-height: 0;
+        height: 100dvh;
+        overflow-x: hidden;
+        overflow-y: auto;
         padding: 18px;
         border-right: 1px solid var(--line);
         background: var(--surface);
         box-shadow: var(--shadow);
+        overscroll-behavior: contain;
         z-index: 2;
       }
 
@@ -233,7 +241,8 @@
       .scene-wrap {
         position: relative;
         min-width: 0;
-        min-height: 100dvh;
+        min-height: 0;
+        height: 100dvh;
         overflow: hidden;
         background: #dfe7ec;
       }
@@ -242,7 +251,6 @@
         display: block;
         width: 100%;
         height: 100%;
-        min-height: 100dvh;
       }
 
       .scene-toolbar {
@@ -318,11 +326,21 @@
       }
 
       @media (max-width: 940px) {
+        body {
+          overflow: auto;
+        }
+
         .app {
           grid-template-columns: 1fr;
+          height: auto;
+          min-height: 100dvh;
+          overflow: visible;
         }
 
         .side {
+          height: auto;
+          max-height: none;
+          overflow: visible;
           border-right: 0;
           border-bottom: 1px solid var(--line);
           box-shadow: none;
@@ -330,7 +348,8 @@
 
         .scene-wrap,
         #scene {
-          min-height: 58dvh;
+          height: 58dvh;
+          min-height: 360px;
         }
       }