diff --git a/frontend/textbooks/algebra_10_ch1.html b/frontend/textbooks/algebra_10_ch1.html
index 084aaae..afcde01 100644
--- a/frontend/textbooks/algebra_10_ch1.html
+++ b/frontend/textbooks/algebra_10_ch1.html
@@ -690,7 +690,7 @@ function makeBoss(paraId, bossDef){
       const q=document.getElementById(idP+'-q');
       const fb=document.getElementById(idP+'-fb');
       if(st.defeated){
-        stageEl.textContent='✓ Побеждён'; fill.style.width='100%';
+        stageEl.innerHTML='✓ Побеждён'; fill.style.width='100%';
         q.innerHTML='<b style="color:'+bossDef.color+'">Босс повержен!</b>';
         document.getElementById(idP+'-go').disabled=true;
         document.getElementById(idP+'-go').style.opacity=.5;
@@ -3064,7 +3064,7 @@ function buildFinal1(){
       const q=document.getElementById('bb-'+b.n+'-q');
       const fb=document.getElementById('bb-'+b.n+'-fb');
       if(st.defeated){
-        stageEl.textContent='&#10003; Побеждён';
+        stageEl.innerHTML='&#10003; Побеждён';
         fill.style.width='100%';
         q.innerHTML='<b style="color:'+b.color+'">Босс повержен!</b>';
         document.getElementById('bb-'+b.n+'-go').disabled=true;
diff --git a/frontend/textbooks/algebra_10_ch2.html b/frontend/textbooks/algebra_10_ch2.html
index 8a34e09..8c26311 100644
--- a/frontend/textbooks/algebra_10_ch2.html
+++ b/frontend/textbooks/algebra_10_ch2.html
@@ -547,7 +547,7 @@ function makeBoss(paraId, bossDef){
       const q=document.getElementById(idP+'-q');
       const fb=document.getElementById(idP+'-fb');
       if(st.defeated){
-        stageEl.textContent='&#10003; Побеждён'; fill.style.width='100%';
+        stageEl.innerHTML='&#10003; Побеждён'; fill.style.width='100%';
         q.innerHTML='<b style="color:'+bossDef.color+'">Босс повержен!</b>';
         document.getElementById(idP+'-go').disabled=true;
         document.getElementById(idP+'-go').style.opacity=.5;
@@ -1455,7 +1455,7 @@ function buildFinal2(){
       const q=document.getElementById('bb-'+b.n+'-q');
       const fb=document.getElementById('bb-'+b.n+'-fb');
       if(st.defeated){
-        stageEl.textContent='&#10003; Побеждён';
+        stageEl.innerHTML='&#10003; Побеждён';
         fill.style.width='100%';
         q.innerHTML='<b style="color:'+b.color+'">Босс повержен!</b>';
         document.getElementById('bb-'+b.n+'-go').disabled=true;
diff --git a/frontend/textbooks/algebra_10_ch3.html b/frontend/textbooks/algebra_10_ch3.html
index dc65240..315d2b7 100644
--- a/frontend/textbooks/algebra_10_ch3.html
+++ b/frontend/textbooks/algebra_10_ch3.html
@@ -553,7 +553,7 @@ function makeBoss(paraId, bossDef){
       const q=document.getElementById(idP+'-q');
       const fb=document.getElementById(idP+'-fb');
       if(st.defeated){
-        stageEl.textContent='&#10003; Побеждён'; fill.style.width='100%';
+        stageEl.innerHTML='&#10003; Побеждён'; fill.style.width='100%';
         q.innerHTML='<b style="color:'+bossDef.color+'">Босс повержен!</b>';
         document.getElementById(idP+'-go').disabled=true;
         document.getElementById(idP+'-go').style.opacity=.5;
@@ -1476,7 +1476,7 @@ function buildFinal3(){
       const q=document.getElementById('bb-'+b.n+'-q');
       const fb=document.getElementById('bb-'+b.n+'-fb');
       if(st.defeated){
-        stageEl.textContent='&#10003; Побеждён';
+        stageEl.innerHTML='&#10003; Побеждён';
         fill.style.width='100%';
         q.innerHTML='<b style="color:'+b.color+'">Босс повержен!</b>';
         document.getElementById('bb-'+b.n+'-go').disabled=true;
diff --git a/frontend/textbooks/algebra_11_ch1.html b/frontend/textbooks/algebra_11_ch1.html
index eab389f..a0cb14c 100644
--- a/frontend/textbooks/algebra_11_ch1.html
+++ b/frontend/textbooks/algebra_11_ch1.html
@@ -1829,7 +1829,7 @@ function buildFinal1(){
     if(BOSS_STATE[idx].defeated){
       card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
       card.classList.add('glow');
-      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
       ansInp.disabled = true;
     }
     goBtn.addEventListener('click', ()=>{
@@ -1843,7 +1843,7 @@ function buildFinal1(){
         feedback(fb, true, '&#10003; Босс '+b.n+' повержен! +10 XP. '+b.hint);
         addXp(10, 'boss-ch1-'+b.n);
         bumpProgress('final1', 18);
-        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
         ansInp.disabled = true;
         card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
         card.classList.add('glow','pulse');
diff --git a/frontend/textbooks/algebra_11_ch2.html b/frontend/textbooks/algebra_11_ch2.html
index 2c0a14d..9e80551 100644
--- a/frontend/textbooks/algebra_11_ch2.html
+++ b/frontend/textbooks/algebra_11_ch2.html
@@ -2122,7 +2122,7 @@ function buildFinal2(){
     if(BOSS_STATE[idx].defeated){
       card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
       card.classList.add('glow');
-      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
       ansInp.disabled = true;
     }
     goBtn.addEventListener('click', ()=>{
@@ -2136,7 +2136,7 @@ function buildFinal2(){
         feedback(fb, true, '&#10003; Босс '+b.n+' повержен! +10 XP. '+b.hint);
         addXp(10, 'boss-ch2-'+b.n);
         bumpProgress('final2', 18);
-        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
         ansInp.disabled = true;
         card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
         card.classList.add('glow','pulse');
diff --git a/frontend/textbooks/algebra_11_ch3.html b/frontend/textbooks/algebra_11_ch3.html
index b4e6f20..ba6935b 100644
--- a/frontend/textbooks/algebra_11_ch3.html
+++ b/frontend/textbooks/algebra_11_ch3.html
@@ -2682,7 +2682,7 @@ function buildFinal3(){
     if(BOSS_STATE[idx].defeated){
       card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
       card.classList.add('glow');
-      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+      goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
       ansInp.disabled = true;
     }
     goBtn.addEventListener('click', ()=>{
@@ -2696,7 +2696,7 @@ function buildFinal3(){
         feedback(fb, true, '&#10003; Босс '+b.n+' повержен! +10 XP. '+b.hint);
         addXp(10, 'boss-ch3-'+b.n);
         bumpProgress('final3', 18);
-        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.textContent = '&#10003; Повержен';
+        goBtn.disabled = true; goBtn.style.opacity = .55; goBtn.innerHTML = '&#10003; Повержен';
         ansInp.disabled = true;
         card.style.background = 'linear-gradient(135deg,var(--sec-acc-soft),var(--pri-soft))';
         card.classList.add('glow','pulse');