diff --git a/resources/css/components/stacks.css b/resources/css/components/stacks.css
index c76fbd68d42..ce7700ddaeb 100644
--- a/resources/css/components/stacks.css
+++ b/resources/css/components/stacks.css
@@ -23,11 +23,8 @@
     }
     .stack-container {
         @apply absolute inset-0;
-        transition: left 200ms ease-out;
-
-        [dir='rtl'] & {
-            transition: right 200ms ease-out;
-        }
+        transition: transform 200ms ease-out;
+        -webkit-backface-visibility: hidden;
     }
 
     .stack-overlay {
@@ -42,17 +39,6 @@
         @apply relative h-[calc(100svh-1rem)];
     }
 
-    .stack-overlay-fade-enter-active,
-    .stack-overlay-fade-leave-active {
-        transition: opacity 200ms ease-out;
-        will-change: opacity;
-    }
-
-    .stack-overlay-fade-enter-from,
-    .stack-overlay-fade-leave-to {
-        opacity: 0;
-    }
-
     .stack-slide-enter-active,
     .stack-slide-leave-active {
         transition: transform 200ms ease-out, opacity 200ms ease-out;
@@ -81,10 +67,14 @@
 @media all and (max-width: 980px) {
     .stacks-on-stacks .stack-container {
         left: 0 !important;
+        right: 0 !important;
+        width: 100% !important;
+        transform: translateX(0) !important;
 
         [dir='rtl'] & {
-            left: unset !important;
+            left: 0 !important;
             right: 0 !important;
+            transform: translateX(0) !important;
         }
     }
 }
diff --git a/resources/js/components/blueprints/Fields.vue b/resources/js/components/blueprints/Fields.vue
index 9166a02ef77..8764dfc2870 100644
--- a/resources/js/components/blueprints/Fields.vue
+++ b/resources/js/components/blueprints/Fields.vue
@@ -34,26 +34,25 @@
             <ui-button icon="add-circle" :text="__('Create Field')" @click="createField" />
         </div>
 
+        <!-- Single stack for picker → settings so selecting a field type swaps content without closing/reopening (no animation). -->
         <Stack
-            v-model:open="isSelectingNewFieldtype"
-            @closed="isSelectingNewFieldtype = false"
-            :title="__('Fieldtypes')"
-            icon="cog"
+            :open="isCreateFieldStackOpen"
+            @update:open="(value) => { if (!value) closeCreateFieldStack() }"
+            @closed="closeCreateFieldStack"
+            :title="isSelectingNewFieldtype ? __('Fieldtypes') : undefined"
+            :icon="isSelectingNewFieldtype ? 'cog' : null"
+            :inset="!!pendingCreatedField"
+            :show-close-button="isSelectingNewFieldtype"
+            :wrap-slot="!pendingCreatedField"
             v-slot="{ close }"
         >
-            <fieldtype-selector @closed="close" @selected="fieldtypeSelected" />
-        </Stack>
-
-        <Stack
-            :open="pendingCreatedField != null"
-            @update:open="(value) => { if (!value) pendingCreatedField = null }"
-            @closed="pendingCreatedField = null"
-            v-slot="{ close }"
-            inset
-            :show-close-button="false"
-            :wrap-slot="false"
-        >
+            <fieldtype-selector
+                v-if="isSelectingNewFieldtype"
+                @closed="onPickerClosed"
+                @selected="fieldtypeSelected"
+            />
             <field-settings
+                v-else-if="pendingCreatedField"
                 ref="settings"
                 :type="pendingCreatedField.config.type"
                 :root="true"
@@ -87,7 +86,7 @@ export default {
         LinkFields,
         FieldtypeSelector,
         FieldSettings,
-	    Stack,
+        Stack,
     },
 
     props: {
@@ -111,6 +110,12 @@ export default {
         };
     },
 
+    computed: {
+        isCreateFieldStackOpen() {
+            return this.isSelectingNewFieldtype || this.pendingCreatedField != null;
+        },
+    },
+
     mounted() {
         if (this.withCommandPalette) {
             this.addToCommandPalette();
@@ -143,6 +148,20 @@ export default {
             this.isSelectingNewFieldtype = true;
         },
 
+        closeCreateFieldStack() {
+            this.isSelectingNewFieldtype = false;
+            this.pendingCreatedField = null;
+        },
+
+        // FieldtypeSelector emits 'closed' after 'selected'; only close stack when user cancelled (no selection).
+        onPickerClosed() {
+            if (this.pendingCreatedField == null) {
+                this.closeCreateFieldStack();
+            } else {
+                this.isSelectingNewFieldtype = false;
+            }
+        },
+
         fieldCreated(created) {
             let handle = created.handle;
             delete created.handle;
diff --git a/resources/js/components/portals/PortalTargets.vue b/resources/js/components/portals/PortalTargets.vue
index 627183d123f..37e78976ab2 100644
--- a/resources/js/components/portals/PortalTargets.vue
+++ b/resources/js/components/portals/PortalTargets.vue
@@ -1,18 +1,31 @@
 <template>
-    <div class="portal-targets" :class="{ 'stacks-on-stacks': hasStacks, 'solo-narrow-stack': isSoloNarrowStack }">
+    <div class="portal-targets" :class="{ 'stacks-on-stacks': hasStacks, 'stack-entering': isStackEntering, 'solo-narrow-stack': isSoloNarrowStack }">
         <div v-for="(portal, i) in portals" :key="portal.id" :id="`portal-target-${portal.id}`" />
     </div>
 </template>
 
 <script>
+import { events } from '@/api';
+
 export default {
+    data() {
+        return {
+            isStackEntering: false,
+            stackEnteringTimeout: null,
+        };
+    },
+
     computed: {
         portals() {
             return this.$portals.all();
         },
 
+        stackCount() {
+            return this.$stacks.count();
+        },
+
         hasStacks() {
-            return this.$stacks.count() > 0;
+            return this.stackCount > 0;
         },
 
         isSoloNarrowStack() {
@@ -20,5 +33,29 @@ export default {
             return stacks.length === 1 && stacks[0]?.data?.vm?.size === 'narrow';
         },
     },
+
+    watch: {
+        stackCount(newCount, oldCount) {
+            if (newCount <= oldCount) {
+                return;
+            }
+
+            clearTimeout(this.stackEnteringTimeout);
+            this.isStackEntering = true;
+            events.$emit('stacks.entering', true);
+
+            // Match the stack enter transition so CSS can ignore hover effects while a new stack slides in.
+            this.stackEnteringTimeout = setTimeout(() => {
+                this.isStackEntering = false;
+                this.stackEnteringTimeout = null;
+                events.$emit('stacks.entering', false);
+            }, 200);
+        },
+    },
+
+    beforeUnmount() {
+        clearTimeout(this.stackEnteringTimeout);
+        events.$emit('stacks.entering', false);
+    },
 };
 </script>
diff --git a/resources/js/components/ui/Stack/Stack.vue b/resources/js/components/ui/Stack/Stack.vue
index c914c0f887a..3172762e683 100644
--- a/resources/js/components/ui/Stack/Stack.vue
+++ b/resources/js/components/ui/Stack/Stack.vue
@@ -45,6 +45,7 @@ const stack = ref(null);
 const mounted = ref(false);
 const visible = ref(false);
 const isHovering = ref(false);
+const isStackEntering = ref(false);
 const escBinding = ref(null);
 const windowInnerWidth = ref(window.innerWidth);
 
@@ -91,6 +92,18 @@ const leftOffset = computed(() => {
 const hasChild = computed(() => stacks.count() > depth.value);
 const direction = computed(() => config.get('direction', 'ltr'));
 
+const containerStyle = computed(() => {
+    if (props.size === 'full') {
+        return direction.value === 'ltr' ? { left: 0, transform: 'translateZ(0)' } : { right: 0, transform: 'translateZ(0)' };
+    }
+    const x = leftOffset.value;
+    const width = `calc(100% - ${x}px)`;
+    if (direction.value === 'ltr') {
+        return { left: 0, width, transform: `translateX(${x}px) translateZ(0)` };
+    }
+    return { right: 0, width, transform: `translateX(-${x}px) translateZ(0)` };
+});
+
 const clickedHitArea = () => {
     if (!visible.value) return;
     if (!runCloseCallback()) return;
@@ -111,6 +124,13 @@ const mouseOutHitArea = () => {
 };
 
 const windowResized = () => windowInnerWidth.value = window.innerWidth;
+const stackEnteringChanged = (entering) => {
+    isStackEntering.value = entering;
+
+    if (entering) {
+        isHovering.value = false;
+    }
+};
 
 function open() {
     if (!stack.value) stack.value = stacks.add(instance.proxy);
@@ -180,10 +200,13 @@ watch(
 );
 
 onMounted(() => {
+    events.$on('stacks.entering', stackEnteringChanged);
+
 	if (props.open) open();
 });
 
 onBeforeUnmount(() => {
+    events.$off('stacks.entering', stackEnteringChanged);
     cleanup();
 });
 
@@ -202,21 +225,19 @@ provide('closeStack', close);
     </Primitive>
     <teleport :to="portal" :order="depth" v-if="mounted">
         <div class="vue-portal-target stack">
+            <div
+                class="stack-overlay fixed inset-0 bg-gray-800/20 dark:bg-gray-800/50 transition-opacity duration-200 ease-out"
+                :class="visible ? 'opacity-100' : 'opacity-0'"
+            />
+
             <FocusScope
 	            :trapped="isTopPortal"
 	            loop
                 class="stack-container outline-none"
                 :class="{ 'stack-is-current': isTopStack }"
-                :style="direction === 'ltr' ? { left: `${leftOffset}px` } : { right: `${leftOffset}px` }"
+                :style="containerStyle"
+                @keydown.esc="isTopStack && runCloseCallback()"
             >
-                <transition name="stack-overlay-fade">
-                    <div
-                        v-if="visible"
-                        class="stack-overlay fixed inset-0 bg-gray-800/20 dark:bg-gray-800/50"
-                        :style="direction === 'ltr' ? { left: `-${leftOffset}px` } : { right: `-${leftOffset}px` }"
-                    />
-                </transition>
-
                 <div
                     class="stack-hit-area"
                     :style="direction === 'ltr' ? { left: `-${offset}px` } : { right: `-${offset}px` }"
@@ -231,7 +252,7 @@ provide('closeStack', close);
                         class="stack-content fixed flex flex-col sm:end-1.5 bg-content-bg dark:bg-dark-content-bg overflow-hidden rounded-xl shadow-[0_8px_5px_-6px_rgba(0,0,0,0.1),_0_3px_8px_0_rgba(0,0,0,0.02),_0_30px_22px_-22px_rgba(39,39,42,0.15)] dark:shadow-[0_5px_20px_rgba(0,0,0,.5)] transition-transform duration-200 ease-out will-change-transform"
                         :class="[
                             size === 'full' ? 'inset-2 w-[calc(100svw-1rem)]' : 'inset-y-2',
-                            { '-translate-x-4 rtl:translate-x-4': isHovering }
+                            { '-translate-x-4 rtl:translate-x-4': isHovering && !isStackEntering }
                         ]"
                     >
                         <template v-if="shouldAddHeader">