diff --git a/frontend/dcViewer.css b/frontend/dcViewer.css
index 3b7b477..2d05245 100644
--- a/frontend/dcViewer.css
+++ b/frontend/dcViewer.css
@@ -214,7 +214,7 @@ header {
 #navCube {
   position: absolute;
   top: 64px;
-  right: 12px;
+  right: 64px;
   width: 100px;
   height: 100px;
   z-index: 5;
@@ -1664,7 +1664,8 @@ header {
 
 #saveProjectBackdrop,
 #deleteProjectBackdrop,
-#shareModalBackdrop {
+#shareModalBackdrop,
+.version-history-backdrop {
   z-index: var(--z-critical-backdrop);
   background: rgba(10, 12, 16, 0.38);
   backdrop-filter: blur(18px) saturate(1.18) brightness(0.82);
@@ -2784,6 +2785,7 @@ header {
   gap: 10px;
   align-items: center;
   padding: 4px 6px 4px 6px;
+  touch-action: none;
 }
 
 .settings-panel .env-range-control.slider-row {
@@ -3245,17 +3247,14 @@ html[data-share-startup="pending"] #loader.hidden {
 .version-history-backdrop {
   position: fixed;
   inset: 0;
-  z-index: var(--z-modal, 10000);
-  background: rgba(0, 0, 0, 0.58);
-  backdrop-filter: blur(18px);
-  -webkit-backdrop-filter: blur(18px);
+  z-index: var(--z-critical-backdrop);
 }
 
 .version-history-modal {
   position: fixed;
   left: 50%;
   top: 50%;
-  z-index: calc(var(--z-modal, 10000) + 1);
+  z-index: var(--z-critical-modal);
   display: flex;
   width: min(96vw, 1280px);
   max-height: min(76vh, 720px);
diff --git a/frontend/dcViewer.js b/frontend/dcViewer.js
index 8420eba..1d12226 100644
--- a/frontend/dcViewer.js
+++ b/frontend/dcViewer.js
@@ -381,10 +381,23 @@ const CAMERA_CONTROL_SETTINGS = {
   dollyProximityThreshold: 90,
 };
 
+const ZOOM_SPEED_PERCENT_MIN = 5;
+const ZOOM_SPEED_PERCENT_MAX = 100;
+const ZOOM_DOLLY_RATE_MIN = 1;
+const ZOOM_DOLLY_RATE_MAX = 100;
+const ZOOM_DOLLY_RESPONSE_EXPONENT = 1.45;
+
 const normalizeZoomSpeed = (value) => {
   const numeric = Number(value);
   if (!Number.isFinite(numeric)) return 20;
-  return Math.min(100, Math.max(5, Math.round(numeric)));
+  return Math.min(ZOOM_SPEED_PERCENT_MAX, Math.max(ZOOM_SPEED_PERCENT_MIN, Math.round(numeric)));
+};
+
+const getZoomDollyRate = (value) => {
+  const normalized = normalizeZoomSpeed(value);
+  const range = ZOOM_SPEED_PERCENT_MAX - ZOOM_SPEED_PERCENT_MIN;
+  const t = range > 0 ? (normalized - ZOOM_SPEED_PERCENT_MIN) / range : 0;
+  return ZOOM_DOLLY_RATE_MIN + (Math.pow(t, ZOOM_DOLLY_RESPONSE_EXPONENT) * (ZOOM_DOLLY_RATE_MAX - ZOOM_DOLLY_RATE_MIN));
 };
 
 const isHexColor = (value) => /^#([0-9a-f]{3}|[0-9a-f]{6})$/i.test(String(value || "").trim());
@@ -453,7 +466,7 @@ const configureCameraControl = () => {
   control.smartPivot = false;
   control.zoomOnMouseWheel = true;
   control.keyboardDollyRate = CAMERA_CONTROL_SETTINGS.keyboardDollyRate;
-  control.mouseWheelDollyRate = activeZoomSpeed;
+  control.mouseWheelDollyRate = getZoomDollyRate(activeZoomSpeed);
   control.dollyInertia = CAMERA_CONTROL_SETTINGS.dollyInertia;
   control.dollyMinSpeed = CAMERA_CONTROL_SETTINGS.dollyMinSpeed;
   control.dollyProximityThreshold = CAMERA_CONTROL_SETTINGS.dollyProximityThreshold;
diff --git a/frontend/src/ui/controls/slider.js b/frontend/src/ui/controls/slider.js
index 22af191..b79b772 100644
--- a/frontend/src/ui/controls/slider.js
+++ b/frontend/src/ui/controls/slider.js
@@ -60,6 +60,57 @@ export function createSliderControl({
     onChange?.(v);
   });
 
+  const clampValue = (next) => Math.min(Number(input.max), Math.max(Number(input.min), next));
+
+  const valueFromClientX = (clientX) => {
+    const rect = input.getBoundingClientRect();
+    const minValue = Number(input.min);
+    const maxValue = Number(input.max);
+    const range = maxValue - minValue;
+    if (!rect.width || !range) return Number(input.value);
+    const ratio = Math.max(0, Math.min(1, (clientX - rect.left) / rect.width));
+    const raw = minValue + (ratio * range);
+    if (input.step === "any") return clampValue(raw);
+    const stepValue = Number(input.step) || 1;
+    return clampValue(minValue + (Math.round((raw - minValue) / stepValue) * stepValue));
+  };
+
+  const commitValue = (nextValue) => {
+    input.value = nextValue;
+    updateFill();
+    onChange?.(Number(input.value));
+  };
+
+  let activeTouchPointerId = null;
+
+  const isTouchLikePointer = (event) => event.pointerType === "touch" || event.pointerType === "pen";
+
+  row.addEventListener("pointerdown", (event) => {
+    if (!isTouchLikePointer(event) || (event.button !== undefined && event.button !== 0)) return;
+    activeTouchPointerId = event.pointerId;
+    event.preventDefault();
+    row.setPointerCapture?.(event.pointerId);
+    input.focus?.({ preventScroll: true });
+    commitValue(valueFromClientX(event.clientX));
+  });
+
+  row.addEventListener("pointermove", (event) => {
+    if (activeTouchPointerId !== event.pointerId) return;
+    event.preventDefault();
+    commitValue(valueFromClientX(event.clientX));
+  });
+
+  const finishTouchPointer = (event) => {
+    if (activeTouchPointerId !== event.pointerId) return;
+    activeTouchPointerId = null;
+    if (row.hasPointerCapture?.(event.pointerId)) {
+      row.releasePointerCapture?.(event.pointerId);
+    }
+  };
+
+  row.addEventListener("pointerup", finishTouchPointer);
+  row.addEventListener("pointercancel", finishTouchPointer);
+
   updateFill();
 
   row.appendChild(lbl);