diff --git a/frontend/exam-prep-mock.html b/frontend/exam-prep-mock.html
index f18ea2d..69d4c7e 100644
--- a/frontend/exam-prep-mock.html
+++ b/frontend/exam-prep-mock.html
@@ -56,6 +56,7 @@
 <script src="/js/exam-prep/api.js"></script>
 <script src="/js/exam-prep/katex.js"></script>
 <script src="/js/exam-prep/answer-check.js"></script>
+<script src="/js/material-save.js"></script>
 <script src="/js/exam-prep/task-card.js"></script>
 <script src="/js/exam-prep/mock.js"></script>
 </body>
diff --git a/frontend/exam-prep-practice.html b/frontend/exam-prep-practice.html
index dccf49e..5c0d30a 100644
--- a/frontend/exam-prep-practice.html
+++ b/frontend/exam-prep-practice.html
@@ -56,6 +56,7 @@
 <script src="/js/exam-prep/api.js"></script>
 <script src="/js/exam-prep/katex.js"></script>
 <script src="/js/exam-prep/answer-check.js"></script>
+<script src="/js/material-save.js"></script>
 <script src="/js/exam-prep/task-card.js"></script>
 <script src="/js/exam-prep/practice.js"></script>
 </body>
diff --git a/frontend/exam-prep-topics.html b/frontend/exam-prep-topics.html
index ce08349..426ad40 100644
--- a/frontend/exam-prep-topics.html
+++ b/frontend/exam-prep-topics.html
@@ -56,6 +56,7 @@
 <script src="/js/exam-prep/api.js"></script>
 <script src="/js/exam-prep/katex.js"></script>
 <script src="/js/exam-prep/answer-check.js"></script>
+<script src="/js/material-save.js"></script>
 <script src="/js/exam-prep/task-card.js"></script>
 <script src="/js/exam-prep/topics.js"></script>
 </body>
diff --git a/frontend/exam-prep-variants.html b/frontend/exam-prep-variants.html
index 1f764b5..69acbbd 100644
--- a/frontend/exam-prep-variants.html
+++ b/frontend/exam-prep-variants.html
@@ -72,6 +72,7 @@
 <script src="/js/exam-prep/api.js"></script>
 <script src="/js/exam-prep/katex.js"></script>
 <script src="/js/exam-prep/answer-check.js"></script>
+<script src="/js/material-save.js"></script>
 <script src="/js/exam-prep/task-card.js"></script>
 <script src="/js/exam-prep/variants.js"></script>
 </body>
diff --git a/frontend/js/exam-prep/task-card.js b/frontend/js/exam-prep/task-card.js
index dbf1a7e..7555d5b 100644
--- a/frontend/js/exam-prep/task-card.js
+++ b/frontend/js/exam-prep/task-card.js
@@ -33,6 +33,10 @@
   function escapeHtml(s) {
     return String(s || '').replace(/[&<>"']/g, c => ({ '&':'&amp;', '<':'&lt;', '>':'&gt;', '"':'&quot;', "'":'&#39;' }[c]));
   }
+  /* HTML → readable plain text (keeps $…$ math source) for saving to materials. */
+  function stripHtml(s) {
+    return String(s || '').replace(/<svg[\s\S]*?<\/svg>/gi, ' ').replace(/<[^>]+>/g, ' ').replace(/\s+/g, ' ').trim();
+  }
 
   /* topic_ref → "Учить тему" deep-link to the textbook chapter/paragraph.
      ref = { slug, paragraph, title }. Paragraph is null for hub links. */
@@ -120,14 +124,18 @@
     }
 
     const refLink = buildRefLink(task.topic_ref);
-    const solBlock = (showSol && task.solution) ? `
-      <div class="tc-sol-wrap">
-        <div class="tc-sol-row">
-          <button class="tc-sol-btn" data-tc-sol>${ICONS.chev}<span>Показать решение</span></button>
-          ${refLink}
-        </div>
-        <div class="tc-sol-panel" data-tc-sol-panel>${task.solution}</div>
-      </div>` : (refLink ? `<div class="tc-sol-wrap"><div class="tc-sol-row">${refLink}</div></div>` : '');
+    const allowSave = mode !== 'mock';
+    const saveMatBtn = allowSave
+      ? `<button class="tc-savemat" data-tc-savemat title="Сохранить задание в «Мои материалы»" style="margin-left:auto;background:none;border:1px solid var(--border,#e2e8f0);border-radius:8px;height:30px;padding:0 10px;cursor:pointer;color:var(--text-3,#64748b);display:inline-flex;align-items:center;gap:5px;font:inherit;font-size:.78rem;font-weight:600">
+          <svg viewBox="0 0 24 24" width="14" height="14" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true"><path d="M19 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h11l5 5v11a2 2 0 0 1-2 2z"/><polyline points="17 21 17 13 7 13 7 21"/><polyline points="7 3 7 8 15 8"/></svg>В мои материалы</button>`
+      : '';
+    const solToggle = (showSol && task.solution)
+      ? `<button class="tc-sol-btn" data-tc-sol>${ICONS.chev}<span>Показать решение</span></button>` : '';
+    const solPanelHtml = (showSol && task.solution)
+      ? `<div class="tc-sol-panel" data-tc-sol-panel>${task.solution}</div>` : '';
+    const solBlock = (solToggle || refLink || saveMatBtn)
+      ? `<div class="tc-sol-wrap"><div class="tc-sol-row">${solToggle}${refLink}${saveMatBtn}</div>${solPanelHtml}</div>`
+      : '';
 
     card.innerHTML = `
       <div class="tc-head">
@@ -147,6 +155,20 @@
     // ── KaTeX render
     EP.katex?.run(card);
 
+    // ── Save task to «Мои материалы» (universal buffer)
+    const saveMatEl = card.querySelector('[data-tc-savemat]');
+    if (saveMatEl) {
+      saveMatEl.addEventListener('click', () => {
+        if (!window.MaterialSave) return;
+        const examTitle = (window.EP && EP.info && EP.info.track && EP.info.track.title) || 'Экзамен';
+        const loc = (task.variant != null ? 'Вариант ' + task.variant + ', ' : '') + '№' + (task.idx != null ? task.idx : numbering);
+        const parts = [stripHtml(task.text)];
+        if (task.answer) parts.push('Ответ: ' + task.answer);
+        if (task.solution) parts.push('Решение: ' + stripHtml(task.solution));
+        MaterialSave.note({ title: examTitle + ' · ' + loc, body: parts.join('\n\n'), sourceTitle: examTitle }, saveMatEl);
+      });
+    }
+
     // ── State
     let startedAt    = Date.now();
     let solutionLogged = false;
diff --git a/frontend/js/material-save.js b/frontend/js/material-save.js
new file mode 100644
index 0000000..1634b8c
--- /dev/null
+++ b/frontend/js/material-save.js
@@ -0,0 +1,55 @@
+'use strict';
+/* material-save.js — универсальная кнопка «В мои материалы».
+ * Тонкий слой поверх LS.saveMaterial / LS.uploadFile: сохраняет заметку,
+ * ссылку или изображение в личную коллекцию ученика из любой части платформы
+ * (учебник, экзамен, лаборатория, чат и т.п.).
+ *
+ *   MaterialSave.note({ title, body, sourceTitle }, btn?)
+ *   MaterialSave.link({ title, url, sourceTitle }, btn?)
+ *   MaterialSave.image({ title, url|blob, name?, sourceTitle }, btn?)
+ *
+ * Требует window.LS (api.js). Показывает тост; кнопку (если передана) блокирует на время.
+ */
+(function () {
+  function ok()  { if (window.LS && LS.toast) LS.toast('Сохранено в «Мои материалы»', 'success'); }
+  function err(e) { if (window.LS && LS.toast) LS.toast((e && e.message) || 'Ошибка сохранения', 'error'); }
+
+  async function note(o, btn) {
+    o = o || {};
+    if (!String(o.body || '').trim() && !String(o.title || '').trim()) { err({ message: 'Пустая заметка' }); return; }
+    if (btn) btn.disabled = true;
+    try {
+      await LS.saveMaterial({ kind: 'note', title: o.title || '', body: o.body || '', sourceTitle: o.sourceTitle || null });
+      ok();
+    } catch (e) { err(e); } finally { if (btn) btn.disabled = false; }
+  }
+
+  async function link(o, btn) {
+    o = o || {};
+    if (!o.url) { err({ message: 'Нет ссылки' }); return; }
+    if (btn) btn.disabled = true;
+    try {
+      await LS.saveMaterial({ kind: 'link', title: o.title || '', url: o.url, sourceTitle: o.sourceTitle || null });
+      ok();
+    } catch (e) { err(e); } finally { if (btn) btn.disabled = false; }
+  }
+
+  async function image(o, btn) {
+    o = o || {};
+    if (btn) btn.disabled = true;
+    try {
+      let url = o.url;
+      if (o.blob) {
+        const fd = new FormData();
+        fd.append('file', o.blob, o.name || 'image.png');
+        const up = await LS.uploadFile(fd);
+        url = LS.downloadFileUrl(up.id);
+      }
+      if (!url) throw new Error('Нет изображения');
+      await LS.saveMaterial({ kind: 'image', title: o.title || '', url: url, sourceTitle: o.sourceTitle || null });
+      ok();
+    } catch (e) { err(e); } finally { if (btn) btn.disabled = false; }
+  }
+
+  window.MaterialSave = { note: note, link: link, image: image };
+})();