diff --git a/components/calendar/__tests__/calendar-dialogs.test.tsx b/components/calendar/__tests__/calendar-dialogs.test.tsx
new file mode 100644
index 000000000..9ec311ce1
--- /dev/null
+++ b/components/calendar/__tests__/calendar-dialogs.test.tsx
@@ -0,0 +1,57 @@
+import { render, screen, fireEvent } from '@testing-library/react';
+import { describe, it, expect, vi } from 'vitest';
+import type { Calendar } from '@/lib/jmap/types';
+import type { IJMAPClient } from '@/lib/jmap/client-interface';
+
+// The event editor opened with the focus on its close button, so typing
+// went nowhere; the import, subscription and new-calendar dialogs were
+// hand-rolled: Escape only worked from some places and no focus handling.
+
+vi.mock('../participant-availability', () => ({ ParticipantAvailability: () => null }));
+
+import { EventModal } from '../event-modal';
+import { ICalImportModal } from '../ical-import-modal';
+import { ICalSubscriptionModal } from '../ical-subscription-modal';
+import { CreateCalendarModal } from '../create-calendar-modal';
+
+const calendars = [{
+  id: 'cal', name: 'Personal', color: '#123456', isDefault: true,
+  myRights: { mayReadItems: true, mayWriteAll: true, mayWriteOwn: true, mayDelete: true },
+}] as unknown as Calendar[];
+const client = { getAccountId: () => 'acct' } as unknown as IJMAPClient;
+
+describe('calendar dialogs', () => {
+  it('opens a new event with the cursor in Title', () => {
+    render(<EventModal calendars={calendars} onSave={vi.fn()} onClose={vi.fn()} />);
+    expect(document.activeElement).toBe(screen.getByPlaceholderText('form.title'));
+  });
+
+  it('closes the import dialog with Escape, wherever the focus is', () => {
+    const onClose = vi.fn();
+    render(<ICalImportModal calendars={calendars} client={client} onClose={onClose} />);
+    const dialog = screen.getByRole('dialog', { name: 'title' });
+    expect(dialog).toHaveAttribute('aria-modal', 'true');
+    fireEvent.keyDown(document.body, { key: 'Escape' });
+    expect(onClose).toHaveBeenCalled();
+  });
+
+  it('opens the subscription dialog in the address field, with a named close button', () => {
+    const onClose = vi.fn();
+    render(<ICalSubscriptionModal client={client} onClose={onClose} />);
+    expect(document.activeElement).toBe(screen.getByLabelText('url_label'));
+    fireEvent.click(screen.getByRole('button', { name: 'close' }));
+    expect(onClose).toHaveBeenCalled();
+  });
+
+  it('opens the new-calendar dialog in the name field and keeps typed input on an outside click', () => {
+    const onClose = vi.fn();
+    render(<CreateCalendarModal client={client} onClose={onClose} />);
+    const name = screen.getByLabelText('name');
+    expect(document.activeElement).toBe(name);
+    fireEvent.change(name, { target: { value: 'Gym' } });
+    const backdrop = screen.getByRole('dialog').parentElement!;
+    fireEvent.mouseDown(backdrop);
+    fireEvent.click(backdrop);
+    expect(onClose).not.toHaveBeenCalled();
+  });
+});
diff --git a/components/calendar/calendar-app.tsx b/components/calendar/calendar-app.tsx
index 245cf2403..053508b2b 100644
--- a/components/calendar/calendar-app.tsx
+++ b/components/calendar/calendar-app.tsx
@@ -69,6 +69,7 @@ import { cn, generateUUID } from "@/lib/utils";
 import type { Calendar, CalendarEvent, CalendarParticipant, CalendarRights, CalendarTask } from "@/lib/jmap/types";
 import { ShareCollectionDialog } from "@/components/settings/share-collection-dialog";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
+import { Dialog } from "@/components/ui/dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
 import { SchedulingDeniedError } from "@/lib/jmap/scheduling-error";
 import { CreateCalendarModal } from "@/components/calendar/create-calendar-modal";
@@ -1686,19 +1687,14 @@ export function CalendarApp({ linkSegments: routeSegments }: CalendarAppProps =
   ) : null;
 
   const renderWebcalActionChoice = () => showWebcalActionChoice && pendingSubscription ? (
-    <div className="fixed inset-0 z-50 flex items-center justify-center">
-      <div className="absolute inset-0 bg-black/50 backdrop-blur-[1px]" onClick={closeWebcalActionChoice} aria-hidden="true" />
-      <div
-        role="dialog"
-        aria-modal="true"
-        aria-label={tWebcalAction("title")}
-        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-md mx-4 animate-in zoom-in-95 duration-200"
-      >
-        <div className="px-6 py-4 border-b border-border">
-          <h2 className="text-lg font-semibold">{tWebcalAction("title")}</h2>
-          <p className="text-sm text-muted-foreground mt-1">{tWebcalAction("description", { name: pendingSubscription.name })}</p>
-        </div>
-        <div className="px-6 py-4 space-y-3">
+    <Dialog
+      isOpen
+      onClose={closeWebcalActionChoice}
+      title={tWebcalAction("title")}
+      description={tWebcalAction("description", { name: pendingSubscription.name })}
+      footer={<Button variant="outline" onClick={closeWebcalActionChoice}>{tWebcalAction("cancel")}</Button>}
+    >
+        <div className="pt-4 space-y-3">
           <Button variant="outline" className="w-full justify-start h-auto py-3" onClick={handleImportWebcal}>
             <span className="text-start">
               <span className="block font-medium">{tWebcalAction("import_title")}</span>
@@ -1712,11 +1708,7 @@ export function CalendarApp({ linkSegments: routeSegments }: CalendarAppProps =
             </span>
           </Button>
         </div>
-        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
-          <Button variant="ghost" onClick={closeWebcalActionChoice}>{tWebcalAction("cancel")}</Button>
-        </div>
-      </div>
-    </div>
+    </Dialog>
   ) : null;
 
   if (!isAuthenticated) return null;
diff --git a/components/calendar/create-calendar-modal.tsx b/components/calendar/create-calendar-modal.tsx
index d18a190f6..d9a4de6e6 100644
--- a/components/calendar/create-calendar-modal.tsx
+++ b/components/calendar/create-calendar-modal.tsx
@@ -1,9 +1,10 @@
 "use client";
 
-import { useCallback, useEffect, useRef, useState } from "react";
+import { useCallback, useId, useRef, useState } from "react";
 import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
-import { X, Loader2, Calendar as CalendarIcon } from "@/components/icons";
+import { Dialog } from "@/components/ui/dialog";
+import { Spinner } from "@/components/ui/spinner";
 import type { IJMAPClient } from "@/lib/jmap/client-interface";
 import { useCalendarStore } from "@/stores/calendar-store";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
@@ -24,7 +25,9 @@ export function CreateCalendarModal({ client, onClose }: CreateCalendarModalProp
   const [color, setColor] = useState("#3b82f6");
   const [kind, setKind] = useState<CalendarKind>("events");
   const [isSubmitting, setIsSubmitting] = useState(false);
-  const modalRef = useRef<HTMLDivElement>(null);
+  const nameRef = useRef<HTMLInputElement>(null);
+  const nameId = useId();
+  const colorId = useId();
 
   const isValid = name.trim().length > 0;
 
@@ -47,109 +50,63 @@ export function CreateCalendarModal({ client, onClose }: CreateCalendarModalProp
     }
   }, [name, color, kind, client, createCalendar, onClose, t]);
 
-  useEffect(() => {
-    const handleKey = (e: KeyboardEvent) => {
-      if (e.key === "Escape" && !isSubmitting) onClose();
-    };
-    window.addEventListener("keydown", handleKey);
-    return () => window.removeEventListener("keydown", handleKey);
-  }, [onClose, isSubmitting]);
-
-  useEffect(() => {
-    const modal = modalRef.current;
-    if (!modal) return;
-    const focusableEls = modal.querySelectorAll<HTMLElement>(
-      'input, select, textarea, button, [tabindex]:not([tabindex="-1"])'
-    );
-    const firstEl = focusableEls[0];
-    const lastEl = focusableEls[focusableEls.length - 1];
-
-    const handler = (e: KeyboardEvent) => {
-      if (e.key !== "Tab") return;
-      if (e.shiftKey && document.activeElement === firstEl) {
-        e.preventDefault();
-        lastEl?.focus();
-      } else if (!e.shiftKey && document.activeElement === lastEl) {
-        e.preventDefault();
-        firstEl?.focus();
-      }
-    };
-    modal.addEventListener("keydown", handler);
-    firstEl?.focus();
-    return () => modal.removeEventListener("keydown", handler);
-  }, []);
+  // Nothing closes it while the calendar is being created.
+  const close = useCallback(() => {
+    if (!isSubmitting) onClose();
+  }, [isSubmitting, onClose]);
 
   return (
-    <div className="fixed inset-0 z-50 flex items-center justify-center">
-      <div
-        className="absolute inset-0 bg-black/50 backdrop-blur-[1px]"
-        onClick={() => !isSubmitting && onClose()}
-        aria-hidden="true"
-      />
-      <div
-        ref={modalRef}
-        role="dialog"
-        aria-modal="true"
-        aria-label={t("add_calendar")}
-        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-md mx-4 animate-in zoom-in-95 duration-200"
-      >
-        <div className="flex items-center justify-between px-6 py-4 border-b border-border">
-          <div className="flex items-center gap-2">
-            <CalendarIcon className="w-5 h-5 text-primary" />
-            <h2 className="text-lg font-semibold">{t("add_calendar")}</h2>
-          </div>
-          <button
-            onClick={onClose}
-            disabled={isSubmitting}
-            className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground disabled:opacity-50"
-            aria-label={tCommon("close")}
-          >
-            <X className="w-5 h-5" />
-          </button>
-        </div>
-
-        <div className="px-6 py-4 space-y-4">
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("name")}
-            </label>
-            <input
-              type="text"
-              value={name}
-              onChange={(e) => setName(e.target.value)}
-              placeholder={t("name_placeholder")}
-              className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
-              disabled={isSubmitting}
-              onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
-            />
-          </div>
-
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("color")}
-            </label>
-            <CalendarColorPicker value={color} onChange={setColor} allowCustom />
-          </div>
-
-          <CalendarKindPicker value={kind} onChange={setKind} disabled={isSubmitting} />
-        </div>
-
-        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
-          <Button variant="outline" onClick={onClose} disabled={isSubmitting}>
+    <Dialog
+      isOpen
+      onClose={close}
+      title={t("add_calendar")}
+      dirty={isValid}
+      initialFocus={nameRef}
+      footer={
+        <>
+          <Button variant="outline" onClick={close} disabled={isSubmitting}>
             {tCommon("cancel")}
           </Button>
           <Button onClick={handleSubmit} disabled={!isValid || isSubmitting}>
             {isSubmitting ? (
               <>
-                <Loader2 className="w-4 h-4 animate-spin me-2" />
+                <Spinner size="sm" className="me-2 text-current" />
                 {tCommon("loading")}
               </>
             ) : (
               t("create")
             )}
           </Button>
+        </>
+      }
+    >
+      <div className="space-y-4 pt-4">
+        <div>
+          <label htmlFor={nameId} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("name")}
+          </label>
+          <input
+            id={nameId}
+            ref={nameRef}
+            type="text"
+            value={name}
+            onChange={(e) => setName(e.target.value)}
+            placeholder={t("name_placeholder")}
+            className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
+            disabled={isSubmitting}
+            onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
+          />
         </div>
+
+        <div role="group" aria-labelledby={colorId}>
+          <span id={colorId} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("color")}
+          </span>
+          <CalendarColorPicker value={color} onChange={setColor} allowCustom />
+        </div>
+
+        <CalendarKindPicker value={kind} onChange={setKind} disabled={isSubmitting} />
       </div>
-    </div>
+    </Dialog>
   );
 }
diff --git a/components/calendar/event-modal.tsx b/components/calendar/event-modal.tsx
index d6d1e4751..dd264c6f1 100644
--- a/components/calendar/event-modal.tsx
+++ b/components/calendar/event-modal.tsx
@@ -46,6 +46,7 @@ import type { CalendarEventView, ConflictWarning } from "@/lib/plugin-types";
 import { eventToView } from "@/lib/plugin-projection";
 import { ConfirmDialog } from "@/components/ui/confirm-dialog";
 import { useConfirmDialog } from "@/hooks/use-confirm-dialog";
+import { useFocusTrap } from "@/hooks/use-focus-trap";
 
 export interface PendingEventPreview {
   start: Date;
@@ -910,7 +911,29 @@ export function EventModal({
     onDuplicate(buildDuplicateEventData(event));
   }, [event, onDuplicate]);
 
-  const modalRef = useRef<HTMLDivElement>(null);
+  const titleRef = useRef<HTMLInputElement>(null);
+  const primaryRef = useRef<HTMLButtonElement>(null);
+  const initialFocusTarget = useCallback(
+    (): HTMLElement | null => (mode === "edit" ? titleRef.current : primaryRef.current),
+    [mode],
+  );
+  // Full screen on the phone: a modal that holds the focus.
+  const modalRef = useFocusTrap({ isActive: !!isMobile, initialFocus: initialFocusTarget });
+
+  // Beside the grid on wide screens: the focus moves in on open and with
+  // each switch between summary and form, and goes back on close.
+  useEffect(() => {
+    if (isMobile) return;
+    initialFocusTarget()?.focus();
+  }, [isMobile, initialFocusTarget]);
+  useEffect(() => {
+    if (isMobile) return;
+    const opener = document.activeElement instanceof HTMLElement ? document.activeElement : null;
+    return () => {
+      const active = document.activeElement;
+      if (opener?.isConnected && (!active || active === document.body)) opener.focus();
+    };
+  }, [isMobile]);
 
   useEffect(() => {
     const handleKey = (e: KeyboardEvent) => {
@@ -931,30 +954,6 @@ export function EventModal({
     return () => window.removeEventListener("keydown", handleKey);
   }, [requestClose, backToView, handleSave, canEditBody, mode, isEdit]);
 
-  useEffect(() => {
-    const modal = modalRef.current;
-    if (!modal) return;
-    const focusableEls = modal.querySelectorAll<HTMLElement>(
-      'input, select, textarea, button, [tabindex]:not([tabindex="-1"])'
-    );
-    const firstEl = focusableEls[0];
-    const lastEl = focusableEls[focusableEls.length - 1];
-
-    const handler = (e: KeyboardEvent) => {
-      if (e.key !== "Tab") return;
-      if (e.shiftKey && document.activeElement === firstEl) {
-        e.preventDefault();
-        lastEl?.focus();
-      } else if (!e.shiftKey && document.activeElement === lastEl) {
-        e.preventDefault();
-        firstEl?.focus();
-      }
-    };
-    modal.addEventListener("keydown", handler);
-    firstEl?.focus();
-    return () => modal.removeEventListener("keydown", handler);
-  }, []);
-
   const hasParticipants = attendees.length > 0 || (event?.participants && Object.keys(event.participants).length > 0);
 
   if (rsvpMode && event) {
@@ -1275,7 +1274,7 @@ export function EventModal({
             )}
           </div>
           {canEditBody && (
-            <Button onClick={() => setMode("edit")}>
+            <Button ref={primaryRef} onClick={() => setMode("edit")}>
               <Pencil className="w-4 h-4 me-1" />
               {t("events.edit")}
             </Button>
@@ -1301,11 +1300,11 @@ export function EventModal({
           <div>
             <label className="text-sm font-medium mb-1 block">{t("form.title")}</label>
             <Input
+              ref={titleRef}
               value={title}
               onChange={(e) => setTitle(e.target.value)}
               placeholder={t("form.title")}
               maxLength={500}
-              autoFocus
             />
           </div>
 
diff --git a/components/calendar/ical-import-modal.tsx b/components/calendar/ical-import-modal.tsx
index 7d7628b08..fdd4aff31 100644
--- a/components/calendar/ical-import-modal.tsx
+++ b/components/calendar/ical-import-modal.tsx
@@ -1,9 +1,11 @@
 "use client";
 
-import { useState, useCallback, useRef, useEffect } from "react";
+import { useState, useCallback, useRef, useId } from "react";
 import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
-import { X, Upload, Check, Loader2, RefreshCw, Globe } from "@/components/icons";
+import { Upload, Check, RefreshCw, Globe } from "@/components/icons";
+import { Dialog } from "@/components/ui/dialog";
+import { Spinner } from "@/components/ui/spinner";
 import { format } from "date-fns";
 import type { CalendarEvent, Calendar } from "@/lib/jmap/types";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
@@ -31,7 +33,6 @@ type ImportMode = "file" | "url";
 export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICalImportModalProps) {
   const t = useTranslations("calendar.import");
   const tCal = useTranslations("calendar");
-  const tCommon = useTranslations("common");
   const tForm = useTranslations("calendar.form");
   const importEvents = useCalendarStore((s) => s.importEvents);
   const timeFormat = useSettingsStore((s) => s.timeFormat);
@@ -50,7 +51,7 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
   const [urlInput, setUrlInput] = useState(initialUrl || "");
   const [isFetchingUrl, setIsFetchingUrl] = useState(false);
   const fileInputRef = useRef<HTMLInputElement>(null);
-  const modalRef = useRef<HTMLDivElement>(null);
+  const targetId = useId();
 
   const validateFile = useCallback((file: File): string | null => {
     if (file.size > MAX_FILE_SIZE) return t("file_too_large");
@@ -215,60 +216,36 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
     }
   };
 
-  useEffect(() => {
-    const handleKey = (e: KeyboardEvent) => {
-      if (e.key === "Escape") onClose();
-    };
-    window.addEventListener("keydown", handleKey);
-    return () => window.removeEventListener("keydown", handleKey);
-  }, [onClose]);
-
-  useEffect(() => {
-    const modal = modalRef.current;
-    if (!modal) return;
-    const focusableEls = modal.querySelectorAll<HTMLElement>(
-      'input, select, textarea, button, [tabindex]:not([tabindex="-1"])'
-    );
-    const firstEl = focusableEls[0];
-    const lastEl = focusableEls[focusableEls.length - 1];
-
-    const handler = (e: KeyboardEvent) => {
-      if (e.key !== "Tab") return;
-      if (e.shiftKey && document.activeElement === firstEl) {
-        e.preventDefault();
-        lastEl?.focus();
-      } else if (!e.shiftKey && document.activeElement === lastEl) {
-        e.preventDefault();
-        firstEl?.focus();
-      }
-    };
-    modal.addEventListener("keydown", handler);
-    firstEl?.focus();
-    return () => modal.removeEventListener("keydown", handler);
-  }, [step]);
+  // Nothing closes it while the events are being imported.
+  const close = useCallback(() => {
+    if (step !== "importing") onClose();
+  }, [step, onClose]);
 
   return (
-    <div className="fixed inset-0 z-50 flex items-center justify-center">
-      <div className="absolute inset-0 bg-black/50 backdrop-blur-[1px]" onClick={onClose} aria-hidden="true" />
-      <div
-        ref={modalRef}
-        role="dialog"
-        aria-modal="true"
-        aria-label={t("title")}
-        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-lg mx-4 max-h-[90vh] overflow-y-auto animate-in zoom-in-95 duration-200"
-      >
-        <div className="flex items-center justify-between px-6 py-4 border-b border-border">
-          <h2 className="text-lg font-semibold">{t("title")}</h2>
-          <button
-            onClick={onClose}
-            className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground"
-            aria-label={tCommon("close")}
-          >
-            <X className="w-5 h-5" />
-          </button>
-        </div>
-
-        <div className="px-6 py-4 space-y-4">
+    <Dialog
+      isOpen
+      onClose={close}
+      title={t("title")}
+      size="full-on-phone"
+      dirty={step !== "select" || urlInput.trim() !== (initialUrl ?? "")}
+      footer={step !== "importing" ? (
+        <>
+          <Button variant="outline" onClick={close}>
+            {tForm("cancel")}
+          </Button>
+          {step === "preview" && (
+            <Button
+              onClick={handleImport}
+              disabled={selectedIndices.size === 0}
+            >
+              <Check className="w-4 h-4 me-1" />
+              {t("import_button")} ({selectedIndices.size})
+            </Button>
+          )}
+        </>
+      ) : undefined}
+    >
+        <div className="pt-4 space-y-4">
           {step === "select" && !isParsing && (
             <>
               <div className="flex border-b border-border mb-4">
@@ -334,6 +311,7 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
                       value={urlInput}
                       onChange={(e) => setUrlInput(e.target.value)}
                       placeholder={t("url_placeholder")}
+                      aria-label={t("tab_url")}
                       className="flex-1 rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
                       onKeyDown={(e) => { if (e.key === "Enter") handleUrlFetch(); }}
                     />
@@ -342,7 +320,7 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
                       disabled={!urlInput.trim() || isFetchingUrl}
                     >
                       {isFetchingUrl ? (
-                        <Loader2 className="w-4 h-4 animate-spin" />
+                        <Spinner size="sm" className="text-current" />
                       ) : (
                         t("fetch")
                       )}
@@ -356,13 +334,13 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
 
           {isParsing && (
             <div className="flex flex-col items-center justify-center py-8">
-              <Loader2 className="w-6 h-6 animate-spin text-primary mb-3" />
+              <Spinner className="mb-3" />
               <p className="text-sm text-muted-foreground">{t("parsing")}</p>
             </div>
           )}
 
           {error && (
-            <div className="text-sm text-destructive bg-destructive/10 rounded-md px-3 py-2">
+            <div role="alert" className="text-sm text-destructive bg-destructive/10 rounded-md px-3 py-2">
               {error}
             </div>
           )}
@@ -417,10 +395,11 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
 
               {calendars.length > 1 && (
                 <div>
-                  <label className="text-sm font-medium mb-1 block">
+                  <label htmlFor={targetId} className="text-sm font-medium mb-1 block">
                     {t("target_calendar")}
                   </label>
                   <select
+                    id={targetId}
                     value={calendarId}
                     onChange={(e) => setCalendarId(e.target.value)}
                     className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
@@ -438,29 +417,11 @@ export function ICalImportModal({ calendars, client, onClose, initialUrl }: ICal
 
           {step === "importing" && (
             <div className="flex flex-col items-center justify-center py-8">
-              <Loader2 className="w-6 h-6 animate-spin text-primary mb-3" />
+              <Spinner className="mb-3" />
               <p className="text-sm text-muted-foreground">{t("importing")}</p>
             </div>
           )}
         </div>
-
-        {step !== "importing" && (
-          <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
-            <Button variant="outline" onClick={onClose}>
-              {tForm("cancel")}
-            </Button>
-            {step === "preview" && (
-              <Button
-                onClick={handleImport}
-                disabled={selectedIndices.size === 0}
-              >
-                <Check className="w-4 h-4 me-1" />
-                {t("import_button")} ({selectedIndices.size})
-              </Button>
-            )}
-          </div>
-        )}
-      </div>
-    </div>
+    </Dialog>
   );
 }
diff --git a/components/calendar/ical-subscription-modal.tsx b/components/calendar/ical-subscription-modal.tsx
index e1f515e68..127dba74e 100644
--- a/components/calendar/ical-subscription-modal.tsx
+++ b/components/calendar/ical-subscription-modal.tsx
@@ -1,9 +1,10 @@
 "use client";
 
-import { useState, useRef, useEffect, useCallback } from "react";
+import { useState, useRef, useCallback, useId } from "react";
 import { useTranslations } from "next-intl";
 import { Button } from "@/components/ui/button";
-import { X, Loader2, Globe } from "@/components/icons";
+import { Dialog } from "@/components/ui/dialog";
+import { Spinner } from "@/components/ui/spinner";
 import type { IJMAPClient } from '@/lib/jmap/client-interface';
 import { useCalendarStore, type ICalSubscription } from "@/stores/calendar-store";
 import { CalendarColorPicker } from "@/components/settings/calendar-management-settings";
@@ -31,7 +32,9 @@ export function ICalSubscriptionModal({ client, onClose, editSubscription, initi
   const [refreshInterval, setRefreshInterval] = useState(editSubscription?.refreshInterval || 60);
   const [isSubmitting, setIsSubmitting] = useState(false);
   const [error, setError] = useState<string | null>(null);
-  const modalRef = useRef<HTMLDivElement>(null);
+  const urlRef = useRef<HTMLInputElement>(null);
+  const nameRef = useRef<HTMLInputElement>(null);
+  const id = useId();
 
   const isValid = url.trim().length > 0 && name.trim().length > 0;
 
@@ -83,143 +86,110 @@ export function ICalSubscriptionModal({ client, onClose, editSubscription, initi
     }
   }, [url, name, color, refreshInterval, client, isEdit, editSubscription, addICalSubscription, updateICalSubscription, onClose, t]);
 
-  useEffect(() => {
-    const handleKey = (e: KeyboardEvent) => {
-      if (e.key === "Escape") onClose();
-    };
-    window.addEventListener("keydown", handleKey);
-    return () => window.removeEventListener("keydown", handleKey);
-  }, [onClose]);
+  // Nothing closes it while the feed is being fetched.
+  const close = useCallback(() => {
+    if (!isSubmitting) onClose();
+  }, [isSubmitting, onClose]);
+  const changed = isEdit
+    ? url !== editSubscription!.url || name !== editSubscription!.name || color !== editSubscription!.color || refreshInterval !== editSubscription!.refreshInterval
+    : url.trim().length > 0 || name.trim().length > 0;
 
-  useEffect(() => {
-    const modal = modalRef.current;
-    if (!modal) return;
-    const focusableEls = modal.querySelectorAll<HTMLElement>(
-      'input, select, textarea, button, [tabindex]:not([tabindex="-1"])'
-    );
-    const firstEl = focusableEls[0];
-    const lastEl = focusableEls[focusableEls.length - 1];
-
-    const handler = (e: KeyboardEvent) => {
-      if (e.key !== "Tab") return;
-      if (e.shiftKey && document.activeElement === firstEl) {
-        e.preventDefault();
-        lastEl?.focus();
-      } else if (!e.shiftKey && document.activeElement === lastEl) {
-        e.preventDefault();
-        firstEl?.focus();
-      }
-    };
-    modal.addEventListener("keydown", handler);
-    firstEl?.focus();
-    return () => modal.removeEventListener("keydown", handler);
-  }, []);
+  const fieldClass = "w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring";
 
   return (
-    <div className="fixed inset-0 z-50 flex items-center justify-center">
-      <div className="absolute inset-0 bg-black/50 backdrop-blur-[1px]" onClick={onClose} aria-hidden="true" />
-      <div
-        ref={modalRef}
-        role="dialog"
-        aria-modal="true"
-        aria-label={t("title")}
-        className="relative bg-background border border-border rounded-lg shadow-xl w-full max-w-md mx-4 animate-in zoom-in-95 duration-200"
-      >
-        <div className="flex items-center justify-between px-6 py-4 border-b border-border">
-          <div className="flex items-center gap-2">
-            <Globe className="w-5 h-5 text-primary" />
-            <h2 className="text-lg font-semibold">{isEdit ? t("edit_title") : t("title")}</h2>
-          </div>
-          <button
-            onClick={onClose}
-            className="p-1.5 rounded-md hover:bg-muted transition-colors duration-150 text-muted-foreground hover:text-foreground"
-            aria-label={tCommon("close")}
-          >
-            <X className="w-5 h-5" />
-          </button>
-        </div>
-
-        <div className="px-6 py-4 space-y-4">
-          <p className="text-sm text-muted-foreground">{t("description")}</p>
-
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("url_label")}
-            </label>
-            <input
-              type="url"
-              value={url}
-              onChange={(e) => setUrl(e.target.value)}
-              placeholder={t("url_placeholder")}
-              className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
-              disabled={isSubmitting}
-              onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
-            />
-          </div>
-
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("name_label")}
-            </label>
-            <input
-              type="text"
-              value={name}
-              onChange={(e) => setName(e.target.value)}
-              placeholder={t("name_placeholder")}
-              className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
-              disabled={isSubmitting}
-              onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
-            />
-          </div>
-
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("color_label")}
-            </label>
-            <CalendarColorPicker value={color} onChange={setColor} allowCustom />
-          </div>
-
-          <div>
-            <label className="text-xs font-medium text-muted-foreground mb-1 block">
-              {t("refresh_interval")}
-            </label>
-            <select
-              value={refreshInterval}
-              onChange={(e) => setRefreshInterval(Number(e.target.value))}
-              className="w-full rounded-md border border-input bg-background px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ring"
-              disabled={isSubmitting}
-            >
-              <option value={15}>{t("interval_15")}</option>
-              <option value={30}>{t("interval_30")}</option>
-              <option value={60}>{t("interval_60")}</option>
-              <option value={360}>{t("interval_360")}</option>
-              <option value={1440}>{t("interval_1440")}</option>
-            </select>
-          </div>
-
-          {error && (
-            <div className="text-sm text-red-600 dark:text-red-400 bg-red-50 dark:bg-red-950/30 rounded-md px-3 py-2">
-              {error}
-            </div>
-          )}
-        </div>
-
-        <div className="flex items-center justify-end gap-2 px-6 py-4 border-t border-border">
-          <Button variant="outline" onClick={onClose} disabled={isSubmitting}>
+    <Dialog
+      isOpen
+      onClose={close}
+      title={isEdit ? t("edit_title") : t("title")}
+      description={t("description")}
+      dirty={changed}
+      // A link handed over from webcal:// already fills the address.
+      initialFocus={url ? nameRef : urlRef}
+      footer={
+        <>
+          <Button variant="outline" onClick={close} disabled={isSubmitting}>
             {tCommon("cancel")}
           </Button>
           <Button onClick={handleSubmit} disabled={!isValid || isSubmitting}>
             {isSubmitting ? (
               <>
-                <Loader2 className="w-4 h-4 animate-spin me-2" />
+                <Spinner size="sm" className="me-2 text-current" />
                 {isEdit ? t("saving") : t("subscribing")}
               </>
             ) : (
               isEdit ? t("save") : t("subscribe")
             )}
           </Button>
+        </>
+      }
+    >
+      <div className="space-y-4 pt-4">
+        <div>
+          <label htmlFor={`${id}-url`} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("url_label")}
+          </label>
+          <input
+            id={`${id}-url`}
+            ref={urlRef}
+            type="url"
+            value={url}
+            onChange={(e) => setUrl(e.target.value)}
+            placeholder={t("url_placeholder")}
+            className={fieldClass}
+            disabled={isSubmitting}
+            onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
+          />
         </div>
+
+        <div>
+          <label htmlFor={`${id}-name`} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("name_label")}
+          </label>
+          <input
+            id={`${id}-name`}
+            ref={nameRef}
+            type="text"
+            value={name}
+            onChange={(e) => setName(e.target.value)}
+            placeholder={t("name_placeholder")}
+            className={fieldClass}
+            disabled={isSubmitting}
+            onKeyDown={(e) => { if (e.key === "Enter" && isValid) handleSubmit(); }}
+          />
+        </div>
+
+        <div role="group" aria-labelledby={`${id}-color`}>
+          <span id={`${id}-color`} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("color_label")}
+          </span>
+          <CalendarColorPicker value={color} onChange={setColor} allowCustom />
+        </div>
+
+        <div>
+          <label htmlFor={`${id}-interval`} className="text-xs font-medium text-muted-foreground mb-1 block">
+            {t("refresh_interval")}
+          </label>
+          <select
+            id={`${id}-interval`}
+            value={refreshInterval}
+            onChange={(e) => setRefreshInterval(Number(e.target.value))}
+            className={fieldClass}
+            disabled={isSubmitting}
+          >
+            <option value={15}>{t("interval_15")}</option>
+            <option value={30}>{t("interval_30")}</option>
+            <option value={60}>{t("interval_60")}</option>
+            <option value={360}>{t("interval_360")}</option>
+            <option value={1440}>{t("interval_1440")}</option>
+          </select>
+        </div>
+
+        {error && (
+          <div role="alert" className="text-sm text-destructive bg-destructive/10 rounded-md px-3 py-2">
+            {error}
+          </div>
+        )}
       </div>
-    </div>
+    </Dialog>
   );
 }