diff --git a/rtut/ui.py b/rtut/ui.py
index 0da1f9b..2685905 100644
--- a/rtut/ui.py
+++ b/rtut/ui.py
@@ -19,7 +19,7 @@ h1,h2{font-weight:600}a{color:inherit}hr{border:0;border-top:1px solid #8886}
 .step{border:1px solid #8886;padding:.8rem 1rem;margin:.8rem 0}.step.running{border-color:currentColor}
 .pill{font:12px ui-monospace,monospace;border:1px solid #8886;padding:0 .4rem}
 pre{border:1px solid #8886;padding:.5rem;overflow:auto;margin:.4rem 0}
-button,input,select{font:inherit;padding:.25rem .5rem}.head{display:flex;justify-content:space-between;align-items:baseline;gap:1rem}.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.grow{flex:1;min-width:12rem}[hidden]{display:none}#current{scroll-margin-top:1rem}.note{opacity:.75}.bad{font-weight:600}"""
+button,input,select{font:inherit;padding:.25rem .5rem}.head{display:inline-flex;width:calc(100% - 1.6rem);justify-content:space-between;align-items:baseline;gap:1rem;vertical-align:top}summary{cursor:pointer}.row{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap}.grow{flex:1;min-width:12rem}[hidden]{display:none}#current{scroll-margin-top:1rem}.note{opacity:.75}.bad{font-weight:600}"""
 
 
 def page(title: str, body: str) -> bytes:
@@ -106,7 +106,7 @@ class App:
             if cmd and state == "running":       # the command and Copy appear only once the step is started
                 block = f"<pre>{e(cmd)}</pre><button type=button data-copy>Copy</button>"
             elif cmd and state == "done":
-                block = f"<details><summary class=note>Command</summary><pre>{e(cmd)}</pre></details>"
+                block = f"<pre>{e(cmd)}</pre>"                 # kept as a record; no Copy once done
             url = f"/run/{i}/{e(rid)}/{e(s['id'])}"
             v = st.get("verification")
             if state == "todo" and not blocked:
@@ -148,11 +148,12 @@ class App:
                 waiting_for = f"step {n}, {s['title']}"
             rb = f"<p class=note>Rollback: {e(s['rollback'])}</p>" if s.get("rollback") and state in ("running", "failed") else ""
             anchor = " id=current" if s["id"] == current else ""
-            out.append(f"<div{anchor} class='step {state}'><div class=head>"
+            fold = "" if state in ("done", "skipped") else " open"     # finished steps start folded; the triangle toggles
+            out.append(f"<details{anchor} class='step {state}'{fold}><summary><span class=head>"
                        f"<span><b>{n}. {e(s['title'])}</b> "
                        f"<span class=note>[{e(s['owner'])}] {e(s.get('risk', 'read-only'))}</span></span>"
-                       f"<span class=pill>{state}</span></div>{block}"
-                       f"<p class=note>Done when: {e(s['verify']['done_when'])}</p>{rb}{act}</div>")
+                       f"<span class=pill>{state}</span></span></summary>{block}"
+                       f"<p class=note>Done when: {e(s['verify']['done_when'])}</p>{rb}{act}</details>")
         if r.complete:
             out.append("<p><b>All steps done.</b> To record this run as exercising the pack, review and apply: "
                        f"<code>python -m rtut run finish {e(p.path)} {e(rid)} --apply</code></p>")
diff --git a/tests/test_ui.py b/tests/test_ui.py
index 7f531fb..d405e15 100644
--- a/tests/test_ui.py
+++ b/tests/test_ui.py
@@ -131,7 +131,7 @@ def test_command_and_copy_appear_only_when_step_is_started(srv):
     req(srv, "POST", base + "/read-the-sign/done", {"_t": t, "note": "read it twice"})
     _, _, body = req(srv, "GET", base)
     assert "<button type=button data-copy>" not in body               # done: no copy button
-    assert "<details>" in body and "Comment: read it twice" in body   # command kept as a record, comment shown
+    assert "<pre>printf" in body and "Comment: read it twice" in body   # command kept as a record, comment shown
 
 
 def test_action_buttons_left_of_the_comment(srv):
@@ -159,6 +159,22 @@ def test_fail_without_comment_warns_first_then_is_allowed(srv):
 def test_state_pill_is_top_right_after_the_numbered_title(srv):
     t, loc, _ = _showcase_run(srv)
     _, _, body = req(srv, "GET", loc.split("#")[0])
-    head = body[body.index("<div class=head>"):]
+    head = body[body.index("<span class=head>"):]
     assert head.index("1. Read the poem") < head.index("class=pill")     # number and title first, state last
     assert "justify-content:space-between" in body                      # pill pushed to the right edge
+
+
+def test_done_steps_fold_to_the_title_line_and_others_stay_open(srv):
+    t, loc, _ = _showcase_run(srv)
+    base = loc.split("#")[0]
+    _, _, body = req(srv, "GET", base)
+    assert "<details id=current class='step todo' open>" in body        # active step is open
+    req(srv, "POST", base + "/read-the-sign/start", {"_t": t})
+    req(srv, "POST", base + "/read-the-sign/verify", {"_t": t, "ok": "1"})
+    _, _, body = req(srv, "GET", base)
+    assert "<details id=current class='step running' open>" in body
+    req(srv, "POST", base + "/read-the-sign/done", {"_t": t, "note": "fine"})
+    _, _, body = req(srv, "GET", base)
+    assert "<details class='step done'>" in body                        # done: no 'open' attribute, so folded
+    assert "1. Read the poem" in body.split("<details class='step done'>")[1].split("</summary>")[0]   # title line stays in the summary
+    assert "Comment: fine" in body.split("<details class='step done'>")[1].split("</details>")[0]      # the rest is inside the fold