diff --git a/frontend/js/admin/sections/access.js b/frontend/js/admin/sections/access.js
index 2e1c955..98d65ce 100644
--- a/frontend/js/admin/sections/access.js
+++ b/frontend/js/admin/sections/access.js
@@ -42,6 +42,8 @@
   const bucket = (type) => BUCKET[type] || (type + 's');
   const keyName = (type) => KEYNAME[type] || 'id';
   const itemsOf = (type) => (_catalog && _catalog[bucket(type)]) || [];
+  const subjOf = (it) => it.subject || it.subject_slug || '';   // нормализация поля предмета
+  const subjLabel = (s) => SUBJ_LABEL[s] || s || 'Прочее';
   function contentTitle(type, ref) {
     const it = itemsOf(type).find(x => x[keyName(type)] === ref);
     return it ? it.title : ref;
@@ -346,10 +348,17 @@
   function renderClassDetail(right) {
     let html = `
       <div style="font-size:16px;font-weight:700;color:var(--text-1);margin-bottom:14px">Класс «${esc(_selClass.name)}»</div>
-      <div style="display:flex;gap:8px;margin-bottom:14px">
+      <div style="display:flex;gap:8px;margin-bottom:10px">
         <button class="adm-btn adm-btn-small" onclick="accClassBulk(1)">Открыть весь контент</button>
         <button class="adm-btn adm-btn-small" style="background:var(--border-h);color:var(--text-3)" onclick="accClassBulk(0)">Закрыть весь</button>
       </div>`;
+    const subjects = [...new Set(CONTENT_TYPES.flatMap(t => itemsOf(t).map(subjOf)).filter(Boolean))].sort();
+    if (subjects.length) {
+      html += `<div style="display:flex;gap:6px;align-items:center;flex-wrap:wrap;margin-bottom:14px">
+        <span style="font-size:12px;color:var(--muted)">Открыть по предмету:</span>
+        ${subjects.map(s => `<button class="adm-btn adm-btn-small" style="background:var(--accent-soft,#eef2ff);color:var(--accent,#4f46e5)" onclick="accClassSubj('${esc(s)}')">+ ${esc(subjLabel(s))}</button>`).join('')}
+      </div>`;
+    }
     CONTENT_TYPES.forEach(type => {
       const items = itemsOf(type);
       html += `<div style="font-weight:600;font-size:13px;color:var(--text-3);margin:14px 0 8px">${TYPE_LABEL[type]}</div>`;
@@ -376,6 +385,18 @@
     } catch (e) { LS.toast('Ошибка: ' + e.message, 'error'); selClass(_selClass.id); }
   }
 
+  /* открыть классу весь контент одного предмета (любого типа) */
+  async function classSubjectBulk(subj) {
+    const items = CONTENT_TYPES.flatMap(t => itemsOf(t).filter(it => subjOf(it) === subj).map(it => [t, it[keyName(t)]]));
+    if (!items.length) return;
+    try {
+      await Promise.all(items.map(([t, ref]) => LS.accessSetRule(t, ref, 'class', _selClass.id, 1)));
+      items.forEach(([t, ref]) => { const set = _classOpen[bucket(t)]; if (set && !set.has(ref)) { set.add(ref); bumpSummary(t, ref, +1); } });
+      renderRight();
+      LS.toast(`Открыт весь контент по предмету «${subjLabel(subj)}»`, 'success');
+    } catch (e) { LS.toast('Ошибка: ' + e.message, 'error'); selClass(_selClass.id); }
+  }
+
   async function classBulk(allow) {
     if (!allow && !confirm(`Закрыть весь контент у класса «${_selClass.name}»?`)) return;
     const all = CONTENT_TYPES.flatMap(t => itemsOf(t).map(it => [t, it[keyName(t)]]));
@@ -510,6 +531,7 @@
   window.accSelClass     = selClass;
   window.accClassToggle  = classToggle;
   window.accClassBulk    = classBulk;
+  window.accClassSubj    = classSubjectBulk;
   window.accMx           = mxToggle;
   window.accMxSearch     = mxSearch;
   window.accMxRowBulk    = mxRowBulk;