diff --git a/webui/src/features/admin/TenantsPanel.tsx b/webui/src/features/admin/TenantsPanel.tsx
index 8b0b9ae..30d075d 100644
--- a/webui/src/features/admin/TenantsPanel.tsx
+++ b/webui/src/features/admin/TenantsPanel.tsx
@@ -1,6 +1,6 @@
 import { useEffect, useMemo, useRef, useState } from "react";
 import { Pencil, Plus, Search, Trash2 } from "lucide-react";
-import type { ApiSettings, AuthInfo, TenantAdminItem } from "@govoplan/core-webui";
+import type { FormGrid, ApiSettings, AuthInfo, TenantAdminItem } from "@govoplan/core-webui";
 import {
   ActionBlockerHint,
   AdminIconButton,
@@ -294,26 +294,26 @@ export default function TenantsPanel({
         <div className="admin-table-surface"><DataGrid id="admin-tenants-v3" rows={tenants} columns={columns} initialFit="container" getRowKey={(row) => row.id} emptyText="i18n:govoplan-tenancy.no_tenants_found.72d04cf4" /></div>
       </AdminPageLayout>
 
-      <Dialog open={editing !== null} title={editing === "new" ? "i18n:govoplan-tenancy.create_tenant.4dbd55d9" : "i18n:govoplan-tenancy.edit_tenant.e2ba43f9"} onClose={requestCloseEditor} className="admin-dialog admin-dialog-wide" footer={<><Button onClick={requestCloseEditor} disabled={busy} disabledReason={busy ? TENANCY_INTERFACE_I18N.busy : undefined}>i18n:govoplan-tenancy.cancel.77dfd213</Button><Button variant="primary" onClick={() => void save()} disabled={Boolean(saveDisabledReason)} disabledReason={saveDisabledReason}>{busy ? "i18n:govoplan-tenancy.saving.56a2285c" : "i18n:govoplan-tenancy.save_tenant.9eb2ac74"}</Button></>}>
-        <div className="admin-form-grid two-columns">
+      <Dialog variant="administration" size="wide" open={editing !== null} title={editing === "new" ? "i18n:govoplan-tenancy.create_tenant.4dbd55d9" : "i18n:govoplan-tenancy.edit_tenant.e2ba43f9"} onClose={requestCloseEditor} className="" footer={<><Button onClick={requestCloseEditor} disabled={busy} disabledReason={busy ? TENANCY_INTERFACE_I18N.busy : undefined}>i18n:govoplan-tenancy.cancel.77dfd213</Button><Button variant="primary" onClick={() => void save()} disabled={Boolean(saveDisabledReason)} disabledReason={saveDisabledReason}>{busy ? "i18n:govoplan-tenancy.saving.56a2285c" : "i18n:govoplan-tenancy.save_tenant.9eb2ac74"}</Button></>}>
+        <FormGrid columns={2} gap="small" collapseAt="workspace" className="">
           <FormField label="i18n:govoplan-tenancy.name.709a2322" help={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} documentation={TENANCY_FIELD_DOCUMENTATION}><input value={draft.name} disabled={editing !== "new" && !canUpdate} onChange={(event) => setDraft({ ...draft, name: event.target.value })} /></FormField>
           <FormField label="i18n:govoplan-tenancy.slug.094da9b9" help={editing !== "new" ? "i18n:govoplan-tenancy.the_tenant_slug_is_immutable_after_creation.7c9a1025" : !canCreate ? TENANCY_INTERFACE_I18N.createRequired : undefined} documentation={TENANCY_FIELD_DOCUMENTATION}><input value={draft.slug} disabled={editing !== "new" || !canCreate} onChange={(event) => setDraft({ ...draft, slug: event.target.value })} /></FormField>
           {editing === "new" && <FormField label="i18n:govoplan-tenancy.initial_tenant_owner.682291a9" documentation={TENANCY_FIELD_DOCUMENTATION}><select value={draft.ownerAccountId} onChange={(event) => setDraft({ ...draft, ownerAccountId: event.target.value })}>{ownerCandidates.map((candidate) => <option key={candidate.account_id} value={candidate.account_id}>{candidate.display_name ? i18nMessage("i18n:govoplan-tenancy.value_value.c189e8bc", { value0: candidate.display_name, value1: candidate.email }) : candidate.email}</option>)}</select></FormField>}
           <FormField label="i18n:govoplan-tenancy.default_locale.b99d021f" help={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} documentation={TENANCY_FIELD_DOCUMENTATION}><input value={draft.defaultLocale} disabled={editing !== "new" && !canUpdate} onChange={(event) => setDraft({ ...draft, defaultLocale: event.target.value })} /></FormField>
           {editing !== "new" && <FormField label="i18n:govoplan-tenancy.status.bae7d5be" help={!canSuspend ? TENANCY_INTERFACE_I18N.suspendRequired : undefined} documentation={TENANCY_ADMIN_DOCUMENTATION}><select value={draft.isActive ? "active" : "inactive"} disabled={!canSuspend} onChange={(event) => setDraft({ ...draft, isActive: event.target.value === "active" })}><option value="active">i18n:govoplan-tenancy.active.a733b809</option><option value="inactive">i18n:govoplan-tenancy.suspended.794696a7</option></select></FormField>}
           <FormField label="i18n:govoplan-tenancy.description.55f8ebc8" help={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} documentation={TENANCY_FIELD_DOCUMENTATION}><textarea rows={4} value={draft.description} disabled={editing !== "new" && !canUpdate} onChange={(event) => setDraft({ ...draft, description: event.target.value })} /></FormField>
-        </div>
+        </FormGrid>
         <h3>i18n:govoplan-tenancy.system_governance_overrides.97cdf3ce</h3>
-        <div className="admin-form-grid two-columns">
+        <FormGrid columns={2} gap="small" collapseAt="workspace" className="">
           <GovernanceSelect disabled={editing !== "new" && !canUpdate} disabledReason={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} allowDisabled={!systemAllowsCustomGroups} label="i18n:govoplan-tenancy.custom_tenant_groups.570ee603" value={draft.customGroups} onChange={(customGroups) => setDraft({ ...draft, customGroups })} />
           <GovernanceSelect disabled={editing !== "new" && !canUpdate} disabledReason={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} allowDisabled={!systemAllowsCustomRoles} label="i18n:govoplan-tenancy.custom_tenant_roles.a738c37c" value={draft.customRoles} onChange={(customRoles) => setDraft({ ...draft, customRoles })} />
           <GovernanceSelect disabled={editing !== "new" && !canUpdate} disabledReason={editing !== "new" && !canUpdate ? TENANCY_INTERFACE_I18N.updateRequired : undefined} allowDisabled={!systemAllowsApiKeys} label="i18n:govoplan-tenancy.tenant_api_keys.4b1d81f8" value={draft.apiKeys} onChange={(apiKeys) => setDraft({ ...draft, apiKeys })} />
-        </div>
+        </FormGrid>
         <p className="muted small-note">i18n:govoplan-tenancy.inherit_follows_the_current_system_setting_expli.60d4d868</p>
         {systemDeniedGovernance && <p className="muted small-note"><span>i18n:govoplan-tenancy.explicit_allow_is_unavailable_for.8d05fd4a</span>{" "}{systemDeniedGovernance}{" "}<span>i18n:govoplan-tenancy.because_the_current_system_setting_denies_it.3f59c244</span></p>}
       </Dialog>
 
-      <Dialog open={Boolean(viewing)} title="i18n:govoplan-tenancy.tenant_details.5976ba72" onClose={() => setViewing(null)} className="admin-dialog admin-dialog-wide" footer={<Button onClick={() => setViewing(null)}>i18n:govoplan-tenancy.close.bbfa773e</Button>}>
+      <Dialog variant="administration" size="wide" open={Boolean(viewing)} title="i18n:govoplan-tenancy.tenant_details.5976ba72" onClose={() => setViewing(null)} className="" footer={<Button onClick={() => setViewing(null)}>i18n:govoplan-tenancy.close.bbfa773e</Button>}>
         {viewing && <><dl className="admin-details-grid">
           <div><dt>i18n:govoplan-tenancy.tenant.3ca93c78</dt><dd>{viewing.name}</dd></div><div><dt>i18n:govoplan-tenancy.slug.094da9b9</dt><dd>{viewing.slug}</dd></div>
           <div><dt>i18n:govoplan-tenancy.status.bae7d5be</dt><dd>{viewing.is_active ? "i18n:govoplan-tenancy.active.a733b809" : "i18n:govoplan-tenancy.suspended.794696a7"}</dd></div><div><dt>i18n:govoplan-tenancy.default_locale.b99d021f</dt><dd>{viewing.default_locale}</dd></div>