diff --git a/webui/src/features/projects/ProjectsPage.tsx b/webui/src/features/projects/ProjectsPage.tsx
index c54bb79..03346af 100644
--- a/webui/src/features/projects/ProjectsPage.tsx
+++ b/webui/src/features/projects/ProjectsPage.tsx
@@ -19,11 +19,18 @@ import { ActionToolbar,
   DocumentationHelpLink,
   DismissibleAlert,
   FieldLabel,
+  FilterBar,
+  FormLayout,
   IconButton,
   LoadingIndicator,
   PageScrollViewport,
+  SelectionList,
+  SelectionListItem,
+  SelectionListItemContent,
+  StatePanel,
   StatusBadge,
   hasScope,
+  WorkspaceFrame,
   type PlatformRouteContext
 } from "@govoplan/core-webui";
 import {
@@ -205,9 +212,9 @@ export default function ProjectsPage({ settings, auth }: PlatformRouteContext) {
 
   return (
     <main className="projects-page">
-      <div className="projects-shell">
-        <ActionToolbar className="projects-toolbar">
-          <form className="projects-search" onSubmit={submitSearch}>
+      <WorkspaceFrame className="projects-shell" label="Projects workspace" interfaceId="projects.workspace" helpContextId="projects.page.workspace" helpModuleId="projects">
+        <ActionToolbar surface="panel-header" className="projects-toolbar">
+          <FilterBar as="form" surface="control" wrap="never" width="default" className="projects-search" onSubmit={submitSearch}>
             <Search size={17} aria-hidden="true" />
             <input
               value={query}
@@ -216,7 +223,7 @@ export default function ProjectsPage({ settings, auth }: PlatformRouteContext) {
               placeholder="Search portfolios, projects, and milestones"
             />
             <Button type="submit" variant="primary">Search</Button>
-          </form>
+          </FilterBar>
           <label className="projects-kind-filter">
             <span>Type</span>
             <select value={kind} onChange={(event) => setKind(event.target.value as ProjectObjectKind | "")}>
@@ -246,35 +253,28 @@ export default function ProjectsPage({ settings, auth }: PlatformRouteContext) {
           <PageScrollViewport className="projects-list-viewport">
             {loading && <LoadingIndicator label="Loading projects" />}
             {!loading && objects.length === 0 &&
-              <div className="projects-empty">No matching planning objects.</div>
+              <StatePanel size="compact" description="No matching planning objects." />
             }
-            <div className="projects-list" role="list">
+            <SelectionList variant="navigation" label="Planning objects">
               {objects.map((item) =>
-                <button
-                  type="button"
-                  role="listitem"
+                <SelectionListItem
                   key={objectKey(item)}
-                  className={`project-row${objectKey(item) === selectedKey ? " is-selected" : ""}`}
+                  selected={objectKey(item) === selectedKey}
                   onClick={() => setSelectedKey(objectKey(item))}>
-                  <span className="project-row-icon">{kindIcon(item.object_kind)}</span>
-                  <span className="project-row-main">
-                    <strong>{item.title}</strong>
-                    <small>{item.object_key}</small>
-                  </span>
+                  <SelectionListItemContent leading={kindIcon(item.object_kind)} title={item.title} description={`${item.object_key} · ${formatDate(item.due_at)}`} />
                   <StatusBadge status={statusTone(item.state)} label={humanize(item.state)} />
-                  <span className="project-row-date">{formatDate(item.due_at)}</span>
-                </button>
+                </SelectionListItem>
               )}
-            </div>
+            </SelectionList>
           </PageScrollViewport>
           <PageScrollViewport className="project-detail-viewport">
             {selected ?
               <ProjectDetail record={selected} canWrite={canWrite} onEdit={openEdit} /> :
-              <div className="projects-empty">Select a portfolio, project, or milestone.</div>
+              <StatePanel size="fill" title="Planning objects" description="Select a portfolio, project, or milestone." />
             }
           </PageScrollViewport>
         </div>
-      </div>
+      </WorkspaceFrame>
       <ProjectEditorDialog
         open={editorOpen}
         record={editing}
@@ -397,7 +397,7 @@ function ProjectEditorDialog({ open, record, objects, saving, error, onClose, on
         </>
       }>
       {error && <DismissibleAlert tone="danger" resetKey={error}>{error}</DismissibleAlert>}
-      <form id="project-editor-form" className="project-editor-form" onSubmit={submit}>
+      <FormLayout id="project-editor-form" columns={2} gap="compact" collapseAt="narrow" className="project-editor-form" onSubmit={submit}>
         <label>
           <FieldLabel>Type</FieldLabel>
           <select
@@ -413,7 +413,7 @@ function ProjectEditorDialog({ open, record, objects, saving, error, onClose, on
           </select>
         </label>
         {values.kind !== "portfolio" &&
-          <label className="project-editor-wide">
+          <label className="wide">
             <FieldLabel>{values.kind === "milestone" ? "Parent project" : "Portfolio"}</FieldLabel>
             <select
               value={values.parentRef}
@@ -437,7 +437,7 @@ function ProjectEditorDialog({ open, record, objects, saving, error, onClose, on
           <FieldLabel help="Stable identifier used in links and external mappings.">Key</FieldLabel>
           <input value={values.key} disabled={Boolean(record)} required maxLength={120} onChange={(event) => set("key", event.target.value)} />
         </label>
-        <label className="project-editor-wide">
+        <label className="wide">
           <FieldLabel>Title</FieldLabel>
           <input value={values.title} required maxLength={500} onChange={(event) => set("title", event.target.value)} />
         </label>
@@ -462,7 +462,7 @@ function ProjectEditorDialog({ open, record, objects, saving, error, onClose, on
           <FieldLabel>Due</FieldLabel>
           <input type="date" value={values.dueAt} onChange={(event) => set("dueAt", event.target.value)} />
         </label>
-        <label className="project-editor-wide">
+        <label className="wide">
           <FieldLabel>Description</FieldLabel>
           <textarea rows={5} value={values.description} onChange={(event) => set("description", event.target.value)} />
         </label>
@@ -470,7 +470,7 @@ function ProjectEditorDialog({ open, record, objects, saving, error, onClose, on
           <FieldLabel help="Recorded with the immutable project revision and lifecycle evidence.">Change reason</FieldLabel>
           <input value={values.changeReason} required maxLength={1000} onChange={(event) => set("changeReason", event.target.value)} />
         </label>
-      </form>
+      </FormLayout>
     </Dialog>
   );
 }
diff --git a/webui/src/styles/projects.css b/webui/src/styles/projects.css
index d16dc2d..9b433cc 100644
--- a/webui/src/styles/projects.css
+++ b/webui/src/styles/projects.css
@@ -1,36 +1,11 @@
-.projects-page,
-.projects-shell {
+.projects-page {
   height: 100%;
   min-height: 0;
   overflow: hidden;
 }
 
-.projects-shell {
-  display: flex;
-  flex-direction: column;
-  background: var(--surface);
-}
-
-.projects-toolbar {
-  display: flex;
-  align-items: center;
-  gap: 12px;
-  min-height: 58px;
-  padding: 10px 16px;
-  border-bottom: 1px solid var(--border);
-  background: var(--surface-raised);
-}
-
 .projects-search {
-  display: flex;
-  align-items: center;
-  gap: 8px;
-  width: min(560px, 48vw);
-}
-
-.projects-search input {
-  min-width: 160px;
-  flex: 1;
+  flex: 1 1 560px;
 }
 
 .projects-kind-filter {
@@ -67,69 +42,6 @@
   background: var(--surface-subtle, var(--surface));
 }
 
-.projects-list {
-  overflow: hidden;
-  border: 1px solid var(--border);
-  border-radius: 6px;
-  background: var(--surface-raised);
-}
-
-.project-row {
-  display: grid;
-  grid-template-columns: 28px minmax(0, 1fr) auto minmax(96px, auto);
-  align-items: center;
-  gap: 10px;
-  width: 100%;
-  min-height: 62px;
-  padding: 9px 12px;
-  border: 0;
-  border-bottom: 1px solid var(--border);
-  background: transparent;
-  color: inherit;
-  text-align: left;
-  cursor: pointer;
-}
-
-.project-row:last-child {
-  border-bottom: 0;
-}
-
-.project-row:hover,
-.project-row:focus-visible,
-.project-row.is-selected {
-  background: var(--hover-bg);
-}
-
-.project-row.is-selected {
-  box-shadow: inset 3px 0 0 var(--accent);
-}
-
-.project-row-icon {
-  display: grid;
-  color: var(--text-soft);
-  place-items: center;
-}
-
-.project-row-main {
-  display: flex;
-  min-width: 0;
-  flex-direction: column;
-  gap: 2px;
-}
-
-.project-row-main strong,
-.project-row-main small {
-  overflow: hidden;
-  text-overflow: ellipsis;
-  white-space: nowrap;
-}
-
-.project-row-main small,
-.project-row-date {
-  color: var(--text-soft);
-  font-size: 0.78rem;
-}
-
 .project-detail {
   width: min(100%, 980px);
   margin: 0 auto;
@@ -228,22 +140,10 @@
   font-size: 0.82rem;
 }
 
-.projects-empty {
-  padding: 36px 10px;
-  color: var(--text-soft);
-  text-align: center;
-}
-
 .project-editor-dialog {
   width: min(720px, calc(100vw - 32px));
 }
 
-.project-editor-form {
-  display: grid;
-  grid-template-columns: repeat(2, minmax(0, 1fr));
-  gap: 12px;
-}
-
 .project-editor-form label {
   display: flex;
   min-width: 0;
@@ -256,20 +156,7 @@
   font-size: 0.8rem;
 }
 
-.project-editor-wide {
-  grid-column: 1 / -1;
-}
-
 @media (max-width: 920px) {
-  .projects-toolbar {
-    align-items: stretch;
-    flex-wrap: wrap;
-  }
-
-  .projects-search {
-    width: 100%;
-  }
-
   .projects-count {
     margin-left: 0;
   }
@@ -291,19 +178,4 @@
 }
 
 @media (max-width: 560px) {
-  .project-row {
-    grid-template-columns: 26px minmax(0, 1fr) auto;
-  }
-
-  .project-row-date {
-    display: none;
-  }
-
-  .project-editor-form {
-    grid-template-columns: 1fr;
-  }
-
-  .project-editor-wide {
-    grid-column: auto;
-  }
 }