diff --git a/App/teacher.html b/App/teacher.html
index 3b1aed8..22ee24b 100644
--- a/App/teacher.html
+++ b/App/teacher.html
@@ -2137,7 +2137,7 @@ function ivAmp(v){ return v<38?'iv-r':v<50?'iv-o':v<62?'iv-y':v<75?'iv-li':'iv-g
 function ivErf(v){
   if (v==null||isNaN(v)) return '<span class="iv-erf"><span class="iv-ebar"><i style="width:0"></i></span><b style="color:var(--ivmut)">–</b></span>';
   v=Math.round(v);
-  return '<span class="iv-erf"><span class="iv-ebar '+ivAmp(v)+'"><i style="width:'+v+'%"></i></span><b class="num">'+v+'</b></span>';
+  return '<span class="iv-erf"><span class="iv-ebar"><i class="'+ivAmp(v)+'" style="width:'+v+'%"></i></span><b class="num">'+v+'</b></span>';
 }
 function ivAkt(status){
   var m={aktiv:['iv-on','arbeitet gerade'],idle:['iv-mid','Tab offen, keine Eingabe'],heute:['iv-off','heute schon fertig'],kalt:['iv-off','heute nichts'],nie:['iv-off','noch nie']};
@@ -2227,7 +2227,7 @@ function ivBuildOverview(cockpit, weeks, studentsCount, matrix){
   h+='<div class="iv-h1">Klassenübersicht</div>';
   // Stat-Karten
   h+='<div class="iv-stats">';
-  h+='<div class="iv-stat"><span class="iv-lab">Erfolg Klassenschnitt</span><div class="iv-gfx"><span class="iv-ebar2 '+(erfAvg!=null?ivAmp(erfAvg):'')+'"><i style="width:'+(erfAvg||0)+'%"></i></span><span class="iv-bign num" style="font-size:1.05rem">'+(erfAvg!=null?erfAvg:'–')+'</span></div><span class="iv-exp">0 – 100, aus den letzten Läufen</span></div>';
+  h+='<div class="iv-stat"><span class="iv-lab">Erfolg Klassenschnitt</span><div class="iv-gfx"><span class="iv-ebar2"><i class="'+(erfAvg!=null?ivAmp(erfAvg):'')+'" style="width:'+(erfAvg||0)+'%"></i></span><span class="iv-bign num" style="font-size:1.05rem">'+(erfAvg!=null?erfAvg:'–')+'</span></div><span class="iv-exp">0 – 100, aus den letzten Läufen</span></div>';
   h+='<div class="iv-stat"><span class="iv-lab">Aktuell aktiv</span><div class="iv-gfx"><span class="iv-stripe"><i class="iv-g" style="width:'+(aktiv/tot*100)+'%"></i><i class="iv-y" style="width:'+(idle/tot*100)+'%"></i><i class="iv-r" style="width:'+(rest/tot*100)+'%"></i></span></div><span class="iv-exp">'+aktiv+' aktiv · '+idle+' teilweise · '+rest+' inaktiv</span></div>';
   h+='<div class="iv-stat"><span class="iv-lab">Verlauf Klassenschnitt<span class="iv-maxv">max <b class="num">'+maxLabel+'</b></span></span><div class="iv-gfx"><span class="iv-cav">'+classWeeks.map(function(sec){var frac=sec/classMax;var cls=sec<=0?'iv-z':(frac<.2?'iv-r':frac<.4?'iv-o':frac<.62?'iv-y':frac<.82?'iv-li':'iv-g');return '<i class="'+cls+'" style="height:'+Math.max(2,Math.round(frac*30))+'px"></i>';}).join('')+'</span></div><span class="iv-exp">aktive Zeit pro Woche · 10 Wochen</span></div>';
   h+='<div class="iv-stat"><span class="iv-lab">Schüler:innen</span><div class="iv-gfx"><span class="iv-bign num">'+studentsCount+'</span></div><span class="iv-exp">'+aktiv+' gerade aktiv</span></div>';