diff --git a/apps/remix/app/components/general/document/document-attachments-popover.tsx b/apps/remix/app/components/general/document/document-attachments-popover.tsx
index 4fd3f385c..b65ea3ea0 100644
--- a/apps/remix/app/components/general/document/document-attachments-popover.tsx
+++ b/apps/remix/app/components/general/document/document-attachments-popover.tsx
@@ -21,6 +21,12 @@ export type DocumentAttachmentsPopoverProps = {
   envelopeId: string;
   buttonClassName?: string;
   buttonSize?: 'sm' | 'default';
+
+  /**
+   * Visually hide the button label below the `sm` breakpoint while keeping it
+   * available to screen readers.
+   */
+  collapseLabelOnMobile?: boolean;
 };
 
 const ZAttachmentFormSchema = z.object({
@@ -35,6 +41,7 @@ export const DocumentAttachmentsPopover = ({
   envelopeId,
   buttonClassName,
   buttonSize,
+  collapseLabelOnMobile = false,
 }: DocumentAttachmentsPopoverProps) => {
   const { toast } = useToast();
   const { _ } = useLingui();
@@ -129,7 +136,7 @@ export const DocumentAttachmentsPopover = ({
         <Button variant="outline" className={cn('gap-2', buttonClassName)} size={buttonSize}>
           <Paperclip className="h-4 w-4" />
 
-          <span>
+          <span className={cn(collapseLabelOnMobile && 'sr-only sm:not-sr-only')}>
             <Trans>Attachments</Trans>
             {attachments && attachments.data.length > 0 && <span className="ml-1">({attachments.data.length})</span>}
           </span>
diff --git a/apps/remix/app/components/general/document/embedded-editor-attachment-popover.tsx b/apps/remix/app/components/general/document/embedded-editor-attachment-popover.tsx
index 446d6e6a5..db1dd97a3 100644
--- a/apps/remix/app/components/general/document/embedded-editor-attachment-popover.tsx
+++ b/apps/remix/app/components/general/document/embedded-editor-attachment-popover.tsx
@@ -19,6 +19,12 @@ import { z } from 'zod';
 export type EmbeddedEditorAttachmentPopoverProps = {
   buttonClassName?: string;
   buttonSize?: 'sm' | 'default';
+
+  /**
+   * Visually hide the button label below the `sm` breakpoint while keeping it
+   * available to screen readers.
+   */
+  collapseLabelOnMobile?: boolean;
 };
 
 const ZAttachmentFormSchema = z.object({
@@ -32,6 +38,7 @@ type TAttachmentFormSchema = z.infer<typeof ZAttachmentFormSchema>;
 export const EmbeddedEditorAttachmentPopover = ({
   buttonClassName,
   buttonSize,
+  collapseLabelOnMobile = false,
 }: EmbeddedEditorAttachmentPopoverProps) => {
   const { toast } = useToast();
   const { _ } = useLingui();
@@ -90,7 +97,7 @@ export const EmbeddedEditorAttachmentPopover = ({
         <Button variant="outline" className={cn('gap-2', buttonClassName)} size={buttonSize}>
           <Paperclip className="h-4 w-4" />
 
-          <span>
+          <span className={cn(collapseLabelOnMobile && 'sr-only sm:not-sr-only')}>
             <Trans>Attachments</Trans>
             {attachments.length > 0 && <span className="ml-1">({attachments.length})</span>}
           </span>
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-drag-drop.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-drag-drop.tsx
index b9af073ed..ab062422c 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-drag-drop.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-drag-drop.tsx
@@ -24,6 +24,7 @@ import {
   UserIcon,
 } from 'lucide-react';
 import { useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import { createPortal } from 'react-dom';
 
 const MIN_HEIGHT_PX = 12;
 const MIN_WIDTH_PX = 36;
@@ -88,11 +89,18 @@ export const fieldButtonList = [
 type EnvelopeEditorFieldDragDropProps = {
   selectedRecipientId: number | null;
   selectedEnvelopeItemId: string | null;
+
+  /**
+   * Called when the user picks a field type from the palette, before the field
+   * is placed on the document.
+   */
+  onFieldSelect?: (fieldType: FieldType) => void;
 };
 
 export const EnvelopeEditorFieldDragDrop = ({
   selectedRecipientId,
   selectedEnvelopeItemId,
+  onFieldSelect,
 }: EnvelopeEditorFieldDragDropProps) => {
   const { envelope, editorFields, isTemplate, getRecipientColorKey } = useCurrentEnvelopeEditor();
 
@@ -245,7 +253,10 @@ export const EnvelopeEditorFieldDragDrop = ({
             disabled={isFieldsDisabled}
             key={field.type}
             type="button"
-            onClick={() => setSelectedField(field.type)}
+            onClick={() => {
+              setSelectedField(field.type);
+              onFieldSelect?.(field.type);
+            }}
             onMouseDown={() => setSelectedField(field.type)}
             data-selected={selectedField === field.type ? true : undefined}
             className={cn(
@@ -267,27 +278,35 @@ export const EnvelopeEditorFieldDragDrop = ({
         ))}
       </div>
 
-      {selectedField && (
-        <div
-          className={cn(
-            'pointer-events-none fixed z-50 flex cursor-pointer flex-col items-center justify-center rounded-[2px] bg-white font-noto text-muted-foreground ring-2 transition duration-200 [container-type:size] dark:text-muted',
-            selectedRecipientStyles.base,
-            selectedField === FieldType.SIGNATURE && 'font-signature',
-            {
-              '-rotate-6 scale-90 opacity-50 dark:bg-black/20': !isFieldWithinBounds,
-              'dark:text-black/60': isFieldWithinBounds,
-            },
-          )}
-          style={{
-            top: coords.y,
-            left: coords.x,
-            height: fieldBounds.current.height,
-            width: fieldBounds.current.width,
-          }}
-        >
-          <span className="text-[clamp(0.425rem,25cqw,0.825rem)]">{t(FRIENDLY_FIELD_TYPE[selectedField])}</span>
-        </div>
-      )}
+      {/*
+       * Portalled to the body because the fields panel ancestor carries a CSS
+       * transform (the slide-in overlay below `md`), which would otherwise
+       * become the containing block for this fixed-position preview and pin
+       * it inside the panel instead of the viewport.
+       */}
+      {selectedField &&
+        createPortal(
+          <div
+            className={cn(
+              'pointer-events-none fixed z-50 flex cursor-pointer flex-col items-center justify-center rounded-[2px] bg-white font-noto text-muted-foreground ring-2 transition duration-200 [container-type:size] dark:text-muted',
+              selectedRecipientStyles.base,
+              selectedField === FieldType.SIGNATURE && 'font-signature',
+              {
+                '-rotate-6 scale-90 opacity-50 dark:bg-black/20': !isFieldWithinBounds,
+                'dark:text-black/60': isFieldWithinBounds,
+              },
+            )}
+            style={{
+              top: coords.y,
+              left: coords.x,
+              height: fieldBounds.current.height,
+              width: fieldBounds.current.width,
+            }}
+          >
+            <span className="text-[clamp(0.425rem,25cqw,0.825rem)]">{t(FRIENDLY_FIELD_TYPE[selectedField])}</span>
+          </div>,
+          document.body,
+        )}
     </>
   );
 };
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-page.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-page.tsx
index a6146156a..e948105d9 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-page.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor-fields-page.tsx
@@ -30,7 +30,7 @@ import { msg } from '@lingui/core/macro';
 import { useLingui } from '@lingui/react';
 import { Trans } from '@lingui/react/macro';
 import { DocumentStatus, FieldType, RecipientRole } from '@prisma/client';
-import { AlertTriangleIcon, FileTextIcon, PencilIcon, SparklesIcon } from 'lucide-react';
+import { AlertTriangleIcon, FileTextIcon, MousePointerClickIcon, PencilIcon, SparklesIcon, XIcon } from 'lucide-react';
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { useRevalidator, useSearchParams } from 'react-router';
 import { isDeepEqual } from 'remeda';
@@ -89,6 +89,10 @@ export const EnvelopeEditorFieldsPage = () => {
   const [isAiEnableDialogOpen, setIsAiEnableDialogOpen] = useState(false);
   const { revalidate } = useRevalidator();
 
+  // Whether the fields panel overlay is open. Only relevant below the `md`
+  // breakpoint, where the panel is hidden behind a floating trigger button.
+  const [isMobileFieldsPanelOpen, setIsMobileFieldsPanelOpen] = useState(false);
+
   const envelopeItemPermissions = useMemo(
     () => getEnvelopeItemPermissions(envelope, envelope.recipients),
     [envelope, envelope.recipients],
@@ -187,6 +191,10 @@ export const EnvelopeEditorFieldsPage = () => {
   }, []);
 
   const onDetectClick = () => {
+    // Close the panel overlay on small viewports so the document stays
+    // visible while the AI dialogs are open.
+    setIsMobileFieldsPanelOpen(false);
+
     if (!team.preferences.aiFeaturesEnabled) {
       setIsAiEnableDialogOpen(true);
       return;
@@ -308,212 +316,264 @@ export const EnvelopeEditorFieldsPage = () => {
 
       {/* Right Section - Form Fields Panel */}
       {currentEnvelopeItem && envelope.recipients.length > 0 && (
-        <div className="sticky top-0 h-full w-80 flex-shrink-0 overflow-y-auto border-border border-l bg-background py-4">
-          {/* Recipient selector section. */}
-          <section className="px-4">
-            <h3 className="mb-2 font-semibold text-foreground text-sm">
-              <Trans>Selected Recipient</Trans>
-            </h3>
+        <>
+          {/* Floating trigger for the fields panel, visible below the `md` breakpoint. */}
+          <Button
+            type="button"
+            className="fixed right-4 bottom-4 z-30 shadow-lg md:hidden"
+            onClick={() => setIsMobileFieldsPanelOpen(true)}
+          >
+            <MousePointerClickIcon className="mr-2 h-4 w-4" />
+            <Trans>Fields</Trans>
+          </Button>
 
-            <EnvelopeRecipientSelector
-              selectedRecipient={editorFields.selectedRecipient}
-              onSelectedRecipientChange={(recipient) => editorFields.setSelectedRecipient(recipient.id)}
-              recipients={envelope.recipients}
-              fields={envelope.fields}
-              className="w-full"
-              align="end"
+          {isMobileFieldsPanelOpen && (
+            <div
+              role="presentation"
+              className="fixed inset-0 z-40 bg-background/80 backdrop-blur-sm md:hidden"
+              onClick={() => setIsMobileFieldsPanelOpen(false)}
             />
+          )}
 
-            {editorFields.selectedRecipient &&
-              !canRecipientFieldsBeModified(editorFields.selectedRecipient, envelope.fields) && (
-                <Alert className="mt-4" variant="warning">
-                  <AlertDescription>
-                    <Trans>
-                      This recipient can no longer be modified as they have signed a field, or completed the document.
-                    </Trans>
-                  </AlertDescription>
-                </Alert>
-              )}
-          </section>
-
-          <Separator className="my-4" />
-
-          {/* Add fields section. */}
-          <section className="px-4">
-            <h3 className="mb-2 font-semibold text-foreground text-sm">
-              <Trans>Add Fields</Trans>
-            </h3>
-
-            <EnvelopeEditorFieldDragDrop
-              selectedRecipientId={editorFields.selectedRecipient?.id ?? null}
-              selectedEnvelopeItemId={currentEnvelopeItem?.id ?? null}
-            />
-
-            {editorConfig.fields?.allowAIDetection && (
-              <>
-                <Button
-                  type="button"
-                  variant="outline"
-                  size="sm"
-                  className="mt-4 w-full"
-                  onClick={onDetectClick}
-                  disabled={envelope.status !== DocumentStatus.DRAFT}
-                  title={
-                    envelope.status !== DocumentStatus.DRAFT
-                      ? _(msg`You can only detect fields in draft envelopes`)
-                      : undefined
-                  }
-                >
-                  <SparklesIcon className="mr-2 -ml-1 h-4 w-4" />
-                  <Trans>Detect with AI</Trans>
-                </Button>
-
-                <AiFieldDetectionDialog
-                  open={isAiFieldDialogOpen}
-                  onOpenChange={setIsAiFieldDialogOpen}
-                  onComplete={onFieldDetectionComplete}
-                  envelopeId={envelope.id}
-                  teamId={envelope.teamId}
-                />
-
-                <AiFeaturesEnableDialog
-                  open={isAiEnableDialogOpen}
-                  onOpenChange={setIsAiEnableDialogOpen}
-                  onEnabled={onAiFeaturesEnabled}
-                />
-              </>
+          {/*
+           * Below `md` the panel is a slide-in overlay, from `md` upwards it is a
+           * static sidebar.
+           *
+           * This is deliberately one always-mounted element toggled with CSS rather
+           * than a Sheet/Drawer: the field palette registers window-level mouse
+           * listeners that must survive the panel closing mid click-to-place, and
+           * unmounting would also double-mount the field settings forms and AI
+           * dialogs. `invisible` (with the transition covering visibility) keeps the
+           * closed overlay out of the tab order and accessibility tree.
+           */}
+          <div
+            className={cn(
+              'fixed inset-y-0 right-0 z-50 w-80 max-w-[85vw] overflow-y-auto border-border border-l bg-background py-4 transition-[transform,visibility] duration-200',
+              isMobileFieldsPanelOpen ? 'translate-x-0 shadow-xl' : 'translate-x-full max-md:invisible',
+              'md:sticky md:top-0 md:z-auto md:h-full md:w-80 md:max-w-none md:flex-shrink-0 md:translate-x-0 md:shadow-none md:transition-none',
             )}
-          </section>
+          >
+            {/* Panel header with close button, visible below the `md` breakpoint. */}
+            <div className="mb-4 flex items-center justify-between px-4 md:hidden">
+              <h3 className="font-semibold text-foreground text-sm">
+                <Trans>Fields</Trans>
+              </h3>
 
-          {/* Field details section. */}
-          <AnimateGenericFadeInOut key={editorFields.selectedField?.formId}>
-            {selectedField && (
-              <section>
-                <Separator className="my-4" />
+              <Button variant="ghost" size="sm" onClick={() => setIsMobileFieldsPanelOpen(false)}>
+                <XIcon className="h-4 w-4" />
+                <span className="sr-only">
+                  <Trans>Close</Trans>
+                </span>
+              </Button>
+            </div>
 
-                {searchParams.get('devmode') && (
-                  <>
-                    <div className="px-4">
-                      <h3 className="mb-3 font-semibold text-foreground text-sm">
-                        <Trans>Developer Mode</Trans>
-                      </h3>
+            {/* Recipient selector section. */}
+            <section className="px-4">
+              <h3 className="mb-2 font-semibold text-foreground text-sm">
+                <Trans>Selected Recipient</Trans>
+              </h3>
 
-                      <div className="space-y-2 rounded-md border border-border bg-muted/50 p-3 text-foreground text-sm">
-                        {selectedField.id && (
+              <EnvelopeRecipientSelector
+                selectedRecipient={editorFields.selectedRecipient}
+                onSelectedRecipientChange={(recipient) => editorFields.setSelectedRecipient(recipient.id)}
+                recipients={envelope.recipients}
+                fields={envelope.fields}
+                className="w-full"
+                align="end"
+              />
+
+              {editorFields.selectedRecipient &&
+                !canRecipientFieldsBeModified(editorFields.selectedRecipient, envelope.fields) && (
+                  <Alert className="mt-4" variant="warning">
+                    <AlertDescription>
+                      <Trans>
+                        This recipient can no longer be modified as they have signed a field, or completed the document.
+                      </Trans>
+                    </AlertDescription>
+                  </Alert>
+                )}
+            </section>
+
+            <Separator className="my-4" />
+
+            {/* Add fields section. */}
+            <section className="px-4">
+              <h3 className="mb-2 font-semibold text-foreground text-sm">
+                <Trans>Add Fields</Trans>
+              </h3>
+
+              <EnvelopeEditorFieldDragDrop
+                selectedRecipientId={editorFields.selectedRecipient?.id ?? null}
+                selectedEnvelopeItemId={currentEnvelopeItem?.id ?? null}
+                onFieldSelect={() => setIsMobileFieldsPanelOpen(false)}
+              />
+
+              {editorConfig.fields?.allowAIDetection && (
+                <>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    className="mt-4 w-full"
+                    onClick={onDetectClick}
+                    disabled={envelope.status !== DocumentStatus.DRAFT}
+                    title={
+                      envelope.status !== DocumentStatus.DRAFT
+                        ? _(msg`You can only detect fields in draft envelopes`)
+                        : undefined
+                    }
+                  >
+                    <SparklesIcon className="mr-2 -ml-1 h-4 w-4" />
+                    <Trans>Detect with AI</Trans>
+                  </Button>
+
+                  <AiFieldDetectionDialog
+                    open={isAiFieldDialogOpen}
+                    onOpenChange={setIsAiFieldDialogOpen}
+                    onComplete={onFieldDetectionComplete}
+                    envelopeId={envelope.id}
+                    teamId={envelope.teamId}
+                  />
+
+                  <AiFeaturesEnableDialog
+                    open={isAiEnableDialogOpen}
+                    onOpenChange={setIsAiEnableDialogOpen}
+                    onEnabled={onAiFeaturesEnabled}
+                  />
+                </>
+              )}
+            </section>
+
+            {/* Field details section. */}
+            <AnimateGenericFadeInOut key={editorFields.selectedField?.formId}>
+              {selectedField && (
+                <section>
+                  <Separator className="my-4" />
+
+                  {searchParams.get('devmode') && (
+                    <>
+                      <div className="px-4">
+                        <h3 className="mb-3 font-semibold text-foreground text-sm">
+                          <Trans>Developer Mode</Trans>
+                        </h3>
+
+                        <div className="space-y-2 rounded-md border border-border bg-muted/50 p-3 text-foreground text-sm">
+                          {selectedField.id && (
+                            <p>
+                              <span className="min-w-12 text-muted-foreground">
+                                <Trans>Field ID:</Trans>
+                              </span>{' '}
+                              {selectedField.id}
+                            </p>
+                          )}
                           <p>
                             <span className="min-w-12 text-muted-foreground">
-                              <Trans>Field ID:</Trans>
+                              <Trans>Recipient ID:</Trans>
                             </span>{' '}
-                            {selectedField.id}
+                            {selectedField.recipientId}
                           </p>
-                        )}
-                        <p>
-                          <span className="min-w-12 text-muted-foreground">
-                            <Trans>Recipient ID:</Trans>
-                          </span>{' '}
-                          {selectedField.recipientId}
-                        </p>
-                        <p>
-                          <span className="min-w-12 text-muted-foreground">
-                            <Trans>Pos X:</Trans>
-                          </span>{' '}
-                          {selectedField.positionX.toFixed(2)}
-                        </p>
-                        <p>
-                          <span className="min-w-12 text-muted-foreground">
-                            <Trans>Pos Y:</Trans>
-                          </span>{' '}
-                          {selectedField.positionY.toFixed(2)}
-                        </p>
-                        <p>
-                          <span className="min-w-12 text-muted-foreground">
-                            <Trans>Width:</Trans>
-                          </span>{' '}
-                          {selectedField.width.toFixed(2)}
-                        </p>
-                        <p>
-                          <span className="min-w-12 text-muted-foreground">
-                            <Trans>Height:</Trans>
-                          </span>{' '}
-                          {selectedField.height.toFixed(2)}
-                        </p>
+                          <p>
+                            <span className="min-w-12 text-muted-foreground">
+                              <Trans>Pos X:</Trans>
+                            </span>{' '}
+                            {selectedField.positionX.toFixed(2)}
+                          </p>
+                          <p>
+                            <span className="min-w-12 text-muted-foreground">
+                              <Trans>Pos Y:</Trans>
+                            </span>{' '}
+                            {selectedField.positionY.toFixed(2)}
+                          </p>
+                          <p>
+                            <span className="min-w-12 text-muted-foreground">
+                              <Trans>Width:</Trans>
+                            </span>{' '}
+                            {selectedField.width.toFixed(2)}
+                          </p>
+                          <p>
+                            <span className="min-w-12 text-muted-foreground">
+                              <Trans>Height:</Trans>
+                            </span>{' '}
+                            {selectedField.height.toFixed(2)}
+                          </p>
+                        </div>
                       </div>
-                    </div>
 
-                    <Separator className="my-4" />
-                  </>
-                )}
+                      <Separator className="my-4" />
+                    </>
+                  )}
 
-                <div className="px-4 [&_label]:text-foreground/70 [&_label]:text-xs">
-                  <h3 className="font-semibold text-sm">{_(FieldSettingsTypeTranslations[selectedField.type])}</h3>
+                  <div className="px-4 [&_label]:text-foreground/70 [&_label]:text-xs">
+                    <h3 className="font-semibold text-sm">{_(FieldSettingsTypeTranslations[selectedField.type])}</h3>
 
-                  {match(selectedField.type)
-                    .with(FieldType.SIGNATURE, () => (
-                      <EditorFieldSignatureForm
-                        value={selectedField?.fieldMeta as TSignatureFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.CHECKBOX, () => (
-                      <EditorFieldCheckboxForm
-                        value={selectedField?.fieldMeta as TCheckboxFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.DATE, () => (
-                      <EditorFieldDateForm
-                        value={selectedField?.fieldMeta as TDateFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.DROPDOWN, () => (
-                      <EditorFieldDropdownForm
-                        value={selectedField?.fieldMeta as TDropdownFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.EMAIL, () => (
-                      <EditorFieldEmailForm
-                        value={selectedField?.fieldMeta as TEmailFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.INITIALS, () => (
-                      <EditorFieldInitialsForm
-                        value={selectedField?.fieldMeta as TInitialsFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.NAME, () => (
-                      <EditorFieldNameForm
-                        value={selectedField?.fieldMeta as TNameFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.NUMBER, () => (
-                      <EditorFieldNumberForm
-                        value={selectedField?.fieldMeta as TNumberFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.RADIO, () => (
-                      <EditorFieldRadioForm
-                        value={selectedField?.fieldMeta as TRadioFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .with(FieldType.TEXT, () => (
-                      <EditorFieldTextForm
-                        value={selectedField?.fieldMeta as TTextFieldMeta | undefined}
-                        onValueChange={(value) => updateSelectedFieldMeta(value)}
-                      />
-                    ))
-                    .otherwise(() => null)}
-                </div>
-              </section>
-            )}
-          </AnimateGenericFadeInOut>
-        </div>
+                    {match(selectedField.type)
+                      .with(FieldType.SIGNATURE, () => (
+                        <EditorFieldSignatureForm
+                          value={selectedField?.fieldMeta as TSignatureFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.CHECKBOX, () => (
+                        <EditorFieldCheckboxForm
+                          value={selectedField?.fieldMeta as TCheckboxFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.DATE, () => (
+                        <EditorFieldDateForm
+                          value={selectedField?.fieldMeta as TDateFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.DROPDOWN, () => (
+                        <EditorFieldDropdownForm
+                          value={selectedField?.fieldMeta as TDropdownFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.EMAIL, () => (
+                        <EditorFieldEmailForm
+                          value={selectedField?.fieldMeta as TEmailFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.INITIALS, () => (
+                        <EditorFieldInitialsForm
+                          value={selectedField?.fieldMeta as TInitialsFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.NAME, () => (
+                        <EditorFieldNameForm
+                          value={selectedField?.fieldMeta as TNameFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.NUMBER, () => (
+                        <EditorFieldNumberForm
+                          value={selectedField?.fieldMeta as TNumberFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.RADIO, () => (
+                        <EditorFieldRadioForm
+                          value={selectedField?.fieldMeta as TRadioFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .with(FieldType.TEXT, () => (
+                        <EditorFieldTextForm
+                          value={selectedField?.fieldMeta as TTextFieldMeta | undefined}
+                          onValueChange={(value) => updateSelectedFieldMeta(value)}
+                        />
+                      ))
+                      .otherwise(() => null)}
+                  </div>
+                </section>
+              )}
+            </AnimateGenericFadeInOut>
+          </div>
+        </>
       )}
     </div>
   );
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor-header.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor-header.tsx
index 5e35ca895..7f678713c 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor-header.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor-header.tsx
@@ -70,17 +70,18 @@ export default function EnvelopeEditorHeader() {
   return (
     <nav className="w-full border-border border-b bg-background px-4 py-3 md:px-6">
       <div className="flex items-center justify-between gap-4">
-        <div className="flex min-w-0 flex-1 items-center space-x-4">
+        <div className="flex min-w-0 flex-1 items-center gap-2 sm:gap-4">
+          {/* The logo and separator are hidden on small viewports to leave room for the title. */}
           {editorConfig.embedded?.customBrandingLogo ? (
-            <img src={`/api/branding/logo/team/${envelope.teamId}`} alt="Logo" className="h-6 w-auto" />
+            <img src={`/api/branding/logo/team/${envelope.teamId}`} alt="Logo" className="hidden h-6 w-auto sm:block" />
           ) : (
-            <Link to="/">
+            <Link to="/" className="hidden sm:block">
               <BrandingLogo className="h-6 w-auto" />
             </Link>
           )}
-          <Separator orientation="vertical" className="h-6 shrink-0" />
+          <Separator orientation="vertical" className="hidden h-6 shrink-0 sm:block" />
 
-          <div className="flex min-w-0 items-center space-x-2">
+          <div className="flex min-w-0 items-center gap-2">
             <EnvelopeItemTitleInput
               dataTestId="envelope-title-input"
               disabled={!envelopeItemPermissions.canTitleBeChanged || !allowConfigureEnvelopeTitle}
@@ -98,19 +99,19 @@ export default function EnvelopeEditorHeader() {
             {envelope.type === EnvelopeType.TEMPLATE && (
               <>
                 {envelope.templateType === TemplateType.PRIVATE && (
-                  <Badge variant="secondary" className="shrink-0">
+                  <Badge variant="secondary" className="hidden shrink-0 sm:inline-flex">
                     <LockIcon className="mr-2 h-4 w-4 text-blue-600 dark:text-blue-300" />
                     <Trans>Private Template</Trans>
                   </Badge>
                 )}
                 {envelope.templateType === TemplateType.ORGANISATION && (
-                  <Badge variant="orange" className="shrink-0">
+                  <Badge variant="orange" className="hidden shrink-0 sm:inline-flex">
                     <Building2Icon className="mr-2 size-4" />
                     <Trans>Organisation Template</Trans>
                   </Badge>
                 )}
                 {envelope.templateType === TemplateType.PUBLIC && (
-                  <Badge variant="default" className="shrink-0">
+                  <Badge variant="default" className="hidden shrink-0 sm:inline-flex">
                     <Globe2Icon className="mr-2 h-4 w-4 text-green-500 dark:text-green-300" />
                     <Trans>Public Template</Trans>
                   </Badge>
@@ -118,7 +119,7 @@ export default function EnvelopeEditorHeader() {
 
                 {envelope.directLink?.token && (
                   <TemplateDirectLinkBadge
-                    className="shrink-0 py-1"
+                    className="hidden shrink-0 py-1 sm:flex"
                     token={envelope.directLink.token}
                     enabled={envelope.directLink.enabled}
                   />
@@ -180,9 +181,9 @@ export default function EnvelopeEditorHeader() {
         <div className="flex shrink-0 items-center space-x-2">
           {allowAttachments &&
             (isEmbedded ? (
-              <EmbeddedEditorAttachmentPopover buttonSize="sm" />
+              <EmbeddedEditorAttachmentPopover buttonSize="sm" collapseLabelOnMobile />
             ) : (
-              <DocumentAttachmentsPopover envelopeId={envelope.id} buttonSize="sm" />
+              <DocumentAttachmentsPopover envelopeId={envelope.id} buttonSize="sm" collapseLabelOnMobile />
             ))}
 
           {editorConfig.settings && (
@@ -202,8 +203,10 @@ export default function EnvelopeEditorHeader() {
                   documentRootPath={relativePath.documentRootPath}
                   trigger={
                     <Button size="sm">
-                      <SendIcon className="mr-2 h-4 w-4" />
-                      <Trans>Send Document</Trans>
+                      <SendIcon className="h-4 w-4 sm:mr-2" />
+                      <span className="sr-only sm:not-sr-only">
+                        <Trans>Send Document</Trans>
+                      </span>
                     </Button>
                   }
                 />
@@ -212,8 +215,10 @@ export default function EnvelopeEditorHeader() {
                   envelope={envelope}
                   trigger={
                     <Button size="sm">
-                      <SendIcon className="mr-2 h-4 w-4" />
-                      <Trans>Resend Document</Trans>
+                      <SendIcon className="h-4 w-4 sm:mr-2" />
+                      <span className="sr-only sm:not-sr-only">
+                        <Trans>Resend Document</Trans>
+                      </span>
                     </Button>
                   }
                 />
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor-recipient-form.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor-recipient-form.tsx
index cff9bab64..8651c0838 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor-recipient-form.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor-recipient-form.tsx
@@ -592,7 +592,7 @@ export const EnvelopeEditorRecipientForm = () => {
 
   return (
     <Card backdropBlur={false} className="border">
-      <CardHeader className="flex flex-row justify-between">
+      <CardHeader className="flex flex-col justify-between gap-4 space-y-0 sm:flex-row">
         <div>
           <CardTitle>
             <Trans>Recipients</Trans>
@@ -602,7 +602,7 @@ export const EnvelopeEditorRecipientForm = () => {
           </CardDescription>
         </div>
 
-        <div className="flex flex-row items-center space-x-2">
+        <div className="flex flex-row flex-wrap items-center gap-2">
           {editorConfig.recipients?.allowAIDetection && (
             <Tooltip>
               <TooltipTrigger asChild>
@@ -842,9 +842,9 @@ export const EnvelopeEditorRecipientForm = () => {
                                 'pr-3': isSigningOrderSequential,
                               })}
                             >
-                              <div className="flex flex-row items-center gap-x-2">
+                              <div className="flex flex-row flex-wrap items-center gap-2 sm:flex-nowrap">
                                 {isSigningOrderSequential && isCcRecipient(signer) && (
-                                  <div className="mt-auto h-10 w-[4.25rem] flex-shrink-0" />
+                                  <div className="mt-auto hidden h-10 w-[4.25rem] flex-shrink-0 sm:block" />
                                 )}
 
                                 {isSigningOrderSequential && !isCcRecipient(signer) && (
@@ -900,8 +900,9 @@ export const EnvelopeEditorRecipientForm = () => {
                                           !form.formState.errors.signers[index]?.email,
                                       })}
                                     >
-                                      {!showAdvancedSettings && index === 0 && (
-                                        <FormLabel>
+                                      {/* Below `sm` the rows are stacked, so every row needs its own labels. */}
+                                      {!showAdvancedSettings && (
+                                        <FormLabel className={cn(index !== 0 && 'sm:hidden')}>
                                           <Trans>Email</Trans>
                                         </FormLabel>
                                       )}
@@ -947,8 +948,8 @@ export const EnvelopeEditorRecipientForm = () => {
                                           !form.formState.errors.signers[index]?.name,
                                       })}
                                     >
-                                      {!showAdvancedSettings && index === 0 && (
-                                        <FormLabel>
+                                      {!showAdvancedSettings && (
+                                        <FormLabel className={cn(index !== 0 && 'sm:hidden')}>
                                           <Trans>Name</Trans>
                                         </FormLabel>
                                       )}
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor-upload-page.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor-upload-page.tsx
index c6fb38938..a7baf6238 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor-upload-page.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor-upload-page.tsx
@@ -448,7 +448,7 @@ export const EnvelopeEditorUploadPage = () => {
   };
 
   return (
-    <div className="mx-auto max-w-4xl space-y-6 p-8">
+    <div className="mx-auto max-w-4xl space-y-6 p-4 md:p-8">
       <input {...getReplaceInputProps()} />
 
       <EnvelopeEditorInvalidDirectTemplateAlert className="max-w-none" />
diff --git a/apps/remix/app/components/general/envelope-editor/envelope-editor.tsx b/apps/remix/app/components/general/envelope-editor/envelope-editor.tsx
index f715669e4..3c0c5461e 100644
--- a/apps/remix/app/components/general/envelope-editor/envelope-editor.tsx
+++ b/apps/remix/app/components/general/envelope-editor/envelope-editor.tsx
@@ -1,3 +1,4 @@
+import { useIsMobileViewport } from '@documenso/lib/client-only/hooks/use-media-query';
 import type { EnvelopeEditorStep } from '@documenso/lib/client-only/providers/envelope-editor-provider';
 import { useCurrentEnvelopeEditor } from '@documenso/lib/client-only/providers/envelope-editor-provider';
 import { mapSecondaryIdToTemplateId } from '@documenso/lib/utils/envelope';
@@ -89,6 +90,8 @@ export const EnvelopeEditor = () => {
 
   const [searchParams, setSearchParams] = useSearchParams();
 
+  const isMobileViewport = useIsMobileViewport();
+
   const {
     general: { minimizeLeftSidebar, allowUploadAndRecipientStep, allowAddFieldsStep, allowPreviewStep },
     actions: {
@@ -101,6 +104,10 @@ export const EnvelopeEditor = () => {
     },
   } = editorConfig;
 
+  // Fall back to the icon-only sidebar on small viewports since the full
+  // sidebar would consume most of the screen.
+  const isSidebarMinimized = minimizeLeftSidebar || isMobileViewport;
+
   const envelopeEditorSteps = useMemo(() => {
     const steps: EnvelopeEditorStepData[] = [];
 
@@ -175,19 +182,19 @@ export const EnvelopeEditor = () => {
   const currentStepData = envelopeEditorSteps.find((step) => step.id === searchParamsStep) || envelopeEditorSteps[0];
 
   return (
-    <div className="h-screen w-screen bg-envelope-editor-background">
+    <div className="h-[100dvh] w-full bg-envelope-editor-background">
       <EnvelopeEditorHeader />
 
       {/* Main Content Area */}
-      <div className="flex h-[calc(100vh-4rem)] w-screen">
+      <div className="flex h-[calc(100dvh-4rem)] w-full">
         {/* Left Section - Step Navigation */}
         <div
           className={cn('flex w-80 flex-shrink-0 flex-col overflow-y-auto border-border border-r bg-background py-4', {
-            'w-14': minimizeLeftSidebar,
+            'w-14': isSidebarMinimized,
           })}
         >
           {/* Left section step selector. */}
-          {minimizeLeftSidebar ? (
+          {isSidebarMinimized ? (
             <div className="flex justify-center px-4">
               <div className="relative flex h-10 w-10 items-center justify-center">
                 <svg className="size-10 -rotate-90" viewBox="0 0 40 40" aria-hidden>
@@ -254,8 +261,8 @@ export const EnvelopeEditor = () => {
 
           <div
             className={cn('space-y-3', {
-              'px-4': !minimizeLeftSidebar,
-              'mt-4 flex flex-col items-center': minimizeLeftSidebar,
+              'px-4': !isSidebarMinimized,
+              'mt-4 flex flex-col items-center': isSidebarMinimized,
             })}
           >
             {envelopeEditorSteps.map((step) => {
@@ -274,7 +281,7 @@ export const EnvelopeEditor = () => {
                         : 'border border-gray-200 hover:bg-gray-50 dark:border-gray-400/20 dark:hover:bg-gray-400/10'
                     }`,
                     {
-                      'p-3': !minimizeLeftSidebar,
+                      'p-3': !isSidebarMinimized,
                     },
                   )}
                   onClick={() => void navigateToStep(step.id as EnvelopeEditorStep)}
@@ -290,7 +297,7 @@ export const EnvelopeEditor = () => {
                       <Icon className={`h-4 w-4 ${isActive ? 'text-green-600' : 'text-gray-600'}`} />
                     </div>
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <div>
                         <div
                           className={`font-medium text-sm ${
@@ -312,17 +319,17 @@ export const EnvelopeEditor = () => {
 
           <Separator
             className={cn('my-6', {
-              'mx-auto mb-4 w-4/5': minimizeLeftSidebar,
+              'mx-auto mb-4 w-4/5': isSidebarMinimized,
             })}
           />
 
           {/* Quick Actions. */}
           <div
             className={cn('space-y-3 px-4 [&_.lucide]:text-muted-foreground', {
-              'px-2': minimizeLeftSidebar,
+              'px-2': isSidebarMinimized,
             })}
           >
-            {!minimizeLeftSidebar && (
+            {!isSidebarMinimized && (
               <h4 className="font-semibold text-foreground text-sm">
                 <Trans>Quick Actions</Trans>
               </h4>
@@ -334,7 +341,7 @@ export const EnvelopeEditor = () => {
                   <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Settings`)}>
                     <SettingsIcon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         {isDocument ? <Trans>Document Settings</Trans> : <Trans>Template Settings</Trans>}
                       </span>
@@ -352,7 +359,7 @@ export const EnvelopeEditor = () => {
                     <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Send Envelope`)}>
                       <SendIcon className="h-4 w-4" />
 
-                      {!minimizeLeftSidebar && (
+                      {!isSidebarMinimized && (
                         <span className="ml-2">
                           <Trans>Send Document</Trans>
                         </span>
@@ -367,7 +374,7 @@ export const EnvelopeEditor = () => {
                     <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Resend Envelope`)}>
                       <SendIcon className="h-4 w-4" />
 
-                      {!minimizeLeftSidebar && (
+                      {!isSidebarMinimized && (
                         <span className="ml-2">
                           <Trans>Resend Document</Trans>
                         </span>
@@ -389,7 +396,7 @@ export const EnvelopeEditor = () => {
                   <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Direct Link`)}>
                     <LinkIcon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         <Trans>Direct Link</Trans>
                       </span>
@@ -407,7 +414,7 @@ export const EnvelopeEditor = () => {
                   <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Duplicate Envelope`)}>
                     <CopyPlusIcon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         {isDocument ? <Trans>Duplicate Document</Trans> : <Trans>Duplicate Template</Trans>}
                       </span>
@@ -424,7 +431,7 @@ export const EnvelopeEditor = () => {
                   <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Save as Template`)}>
                     <FileOutputIcon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         <Trans>Save as Template</Trans>
                       </span>
@@ -444,7 +451,7 @@ export const EnvelopeEditor = () => {
                   <Button variant="ghost" size="sm" className="w-full justify-start" title={t(msg`Download PDF`)}>
                     <DownloadCloudIcon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         <Trans>Download PDF</Trans>
                       </span>
@@ -472,7 +479,7 @@ export const EnvelopeEditor = () => {
                   >
                     <Trash2Icon className="h-4 w-4" />
 
-                    {!minimizeLeftSidebar && (
+                    {!isSidebarMinimized && (
                       <span className="ml-2">
                         {isDocument ? <Trans>Delete Document</Trans> : <Trans>Delete Template</Trans>}
                       </span>
@@ -494,20 +501,20 @@ export const EnvelopeEditor = () => {
           {!editorConfig.embedded && (
             <div
               className={cn('mt-auto px-4', {
-                'px-2': minimizeLeftSidebar,
+                'px-2': isSidebarMinimized,
               })}
             >
               <Button
                 variant="ghost"
                 className={cn('w-full justify-start', {
-                  'flex items-center justify-center': minimizeLeftSidebar,
+                  'flex items-center justify-center': isSidebarMinimized,
                 })}
                 asChild
               >
                 <Link to={relativePath.basePath}>
                   <ArrowLeftIcon className="h-4 w-4 flex-shrink-0" />
 
-                  {!minimizeLeftSidebar && (
+                  {!isSidebarMinimized && (
                     <span className="ml-2">
                       {isDocument ? <Trans>Return to documents</Trans> : <Trans>Return to templates</Trans>}
                     </span>
diff --git a/packages/lib/client-only/hooks/use-media-query.ts b/packages/lib/client-only/hooks/use-media-query.ts
new file mode 100644
index 000000000..0821e3a50
--- /dev/null
+++ b/packages/lib/client-only/hooks/use-media-query.ts
@@ -0,0 +1,34 @@
+import { useCallback, useSyncExternalStore } from 'react';
+
+/**
+ * Tracks whether the given CSS media query currently matches.
+ *
+ * Returns `false` on the server since the viewport is unknown until hydration.
+ */
+export const useMediaQuery = (query: string) => {
+  const subscribe = useCallback(
+    (onStoreChange: () => void) => {
+      const mediaQueryList = window.matchMedia(query);
+
+      mediaQueryList.addEventListener('change', onStoreChange);
+
+      return () => mediaQueryList.removeEventListener('change', onStoreChange);
+    },
+    [query],
+  );
+
+  return useSyncExternalStore(
+    subscribe,
+    () => window.matchMedia(query).matches,
+    // The server snapshot: the viewport is unknown during SSR, so we assume
+    // the query does not match rather than throwing. React re-renders with
+    // the real value after hydration, so the only cost is a brief first
+    // paint with the non-matching variant.
+    () => false,
+  );
+};
+
+/**
+ * Whether the viewport is below the Tailwind `md` breakpoint (768px).
+ */
+export const useIsMobileViewport = () => useMediaQuery('(max-width: 767px)');