diff --git a/plugins/archiv/templates/archiv/index.html b/plugins/archiv/templates/archiv/index.html
index b62623d..1a283bd 100644
--- a/plugins/archiv/templates/archiv/index.html
+++ b/plugins/archiv/templates/archiv/index.html
@@ -22,7 +22,7 @@
 <div class="mb-4 px-4 py-3 rounded-lg border bg-emerald-50 border-emerald-200 text-emerald-800 text-sm">{{ meldung }}</div>
 {% endif %}
 {% if fehler %}
-<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
 {% endif %}
 
 <div class="bg-white border border-slate-200 rounded-xl shadow-sm p-4 mb-6">
diff --git a/plugins/benachrichtigung/templates/benachrichtigung/einstellungen.html b/plugins/benachrichtigung/templates/benachrichtigung/einstellungen.html
index 6e43572..01a8315 100644
--- a/plugins/benachrichtigung/templates/benachrichtigung/einstellungen.html
+++ b/plugins/benachrichtigung/templates/benachrichtigung/einstellungen.html
@@ -15,7 +15,7 @@
 </div>
 {% endif %}
 {% if fehler %}
-<div class="mt-4 mb-2 rounded-lg bg-red-50 border border-red-200 text-red-800 px-4 py-2 text-sm">
+<div class="mt-4 mb-2 rounded-lg bg-red-50 border border-red-200 text-red-800 px-4 py-2 text-sm" role="alert" tabindex="-1">
   {{ fehler }}
 </div>
 {% endif %}
diff --git a/plugins/dedup/templates/dedup/index.html b/plugins/dedup/templates/dedup/index.html
index e3fc9cc..3034f49 100644
--- a/plugins/dedup/templates/dedup/index.html
+++ b/plugins/dedup/templates/dedup/index.html
@@ -31,7 +31,7 @@
   <form method="post" action="/dedup/pruefen" class="flex flex-wrap items-end gap-3">
     <div>
       <label for="titel" class="block text-xs font-medium text-slate-500 mb-1">Spieltitel *</label>
-      <input type="text" id="titel" name="titel" required value="{{ ergebnis.titel if ergebnis else '' }}"
+      <input type="text" id="titel" name="titel" required aria-required="true" value="{{ ergebnis.titel if ergebnis else '' }}"
              class="border border-slate-300 rounded-lg px-3 py-2 text-sm w-72 focus:outline-none focus:ring-2 focus:ring-emerald-500">
     </div>
     <div>
@@ -51,7 +51,7 @@
   </form>
 
   {% if fehler %}
-  <div class="mt-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+  <div class="mt-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
   {% endif %}
   {% if meldung %}
   <div class="mt-4 px-4 py-3 rounded-lg border bg-emerald-50 border-emerald-200 text-emerald-800 text-sm">{{ meldung }}</div>
diff --git a/plugins/erinnerung/templates/erinnerung/bearbeiten.html b/plugins/erinnerung/templates/erinnerung/bearbeiten.html
index 3672ebc..6d1d820 100644
--- a/plugins/erinnerung/templates/erinnerung/bearbeiten.html
+++ b/plugins/erinnerung/templates/erinnerung/bearbeiten.html
@@ -10,12 +10,12 @@
       class="bg-white border border-slate-200 rounded-xl shadow-sm p-4 max-w-2xl space-y-4">
   <div>
     <label for="name" class="block text-xs font-medium text-slate-500 mb-1">Name/Titel der Ausgabe *</label>
-    <input type="text" id="name" name="name" required value="{{ ausgabe.name }}"
+    <input type="text" id="name" name="name" required aria-required="true" value="{{ ausgabe.name }}"
            class="w-full border border-slate-300 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-emerald-500">
   </div>
   <div>
     <label for="redaktionsschluss" class="block text-xs font-medium text-slate-500 mb-1">Redaktionsschluss *</label>
-    <input type="date" id="redaktionsschluss" name="redaktionsschluss" required value="{{ ausgabe.redaktionsschluss.isoformat() }}"
+    <input type="date" id="redaktionsschluss" name="redaktionsschluss" required aria-required="true" value="{{ ausgabe.redaktionsschluss.isoformat() }}"
            class="border border-slate-300 rounded-lg px-3 py-2 text-sm w-48 focus:outline-none focus:ring-2 focus:ring-emerald-500">
   </div>
   <div class="flex items-center gap-3">
diff --git a/plugins/erinnerung/templates/erinnerung/index.html b/plugins/erinnerung/templates/erinnerung/index.html
index db23fc6..bd9a83f 100644
--- a/plugins/erinnerung/templates/erinnerung/index.html
+++ b/plugins/erinnerung/templates/erinnerung/index.html
@@ -13,7 +13,7 @@
 <div class="mb-4 px-4 py-3 rounded-lg border bg-emerald-50 border-emerald-200 text-emerald-800 text-sm">{{ meldung }}</div>
 {% endif %}
 {% if fehler %}
-<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
 {% endif %}
 
 {% if ist_admin %}
@@ -22,12 +22,12 @@
   <form method="post" action="/erinnerung/ausgaben" class="flex flex-wrap items-end gap-3">
     <div>
       <label for="name" class="block text-xs font-medium text-slate-500 mb-1">Name/Titel der Ausgabe *</label>
-      <input type="text" id="name" name="name" required placeholder="z. B. 3/2025"
+      <input type="text" id="name" name="name" required aria-required="true" placeholder="z. B. 3/2025"
              class="border border-slate-300 rounded-lg px-3 py-2 text-sm w-64 focus:outline-none focus:ring-2 focus:ring-emerald-500">
     </div>
     <div>
       <label for="redaktionsschluss" class="block text-xs font-medium text-slate-500 mb-1">Redaktionsschluss *</label>
-      <input type="date" id="redaktionsschluss" name="redaktionsschluss" required
+      <input type="date" id="redaktionsschluss" name="redaktionsschluss" required aria-required="true"
              class="border border-slate-300 rounded-lg px-3 py-2 text-sm w-48 focus:outline-none focus:ring-2 focus:ring-emerald-500">
     </div>
     <button type="submit"
diff --git a/plugins/export/templates/export/index.html b/plugins/export/templates/export/index.html
index b3932f1..87e34fd 100644
--- a/plugins/export/templates/export/index.html
+++ b/plugins/export/templates/export/index.html
@@ -11,7 +11,7 @@
 </p>
 
 {% if fehler %}
-<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
 {% endif %}
 
 <div class="grid gap-4 md:grid-cols-3 mb-6">
diff --git a/plugins/neuheiten/templates/neuheiten/index.html b/plugins/neuheiten/templates/neuheiten/index.html
index 4d4df8c..94691a7 100644
--- a/plugins/neuheiten/templates/neuheiten/index.html
+++ b/plugins/neuheiten/templates/neuheiten/index.html
@@ -15,7 +15,7 @@
 </div>
 {% endif %}
 {% if fehler %}
-<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
 {% endif %}
 
 <div class="flex flex-wrap items-end gap-3 mb-4">
diff --git a/plugins/planung/templates/planung/bearbeiten.html b/plugins/planung/templates/planung/bearbeiten.html
index 2f17ca4..9a74470 100644
--- a/plugins/planung/templates/planung/bearbeiten.html
+++ b/plugins/planung/templates/planung/bearbeiten.html
@@ -18,7 +18,7 @@
       class="bg-white border border-slate-200 rounded-xl shadow-sm p-4 max-w-2xl space-y-4 w-full">
   <div>
     <label for="titel" class="block text-xs font-medium text-slate-500 mb-1">Spieltitel *</label>
-    <input type="text" id="titel" name="titel" required value="{{ eintrag.titel }}"
+    <input type="text" id="titel" name="titel" required aria-required="true" value="{{ eintrag.titel }}"
            class="w-full border border-slate-300 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-emerald-500">
   </div>
   <div class="grid md:grid-cols-2 gap-4">
diff --git a/plugins/planung/templates/planung/index.html b/plugins/planung/templates/planung/index.html
index 0e09574..fe4cd6b 100644
--- a/plugins/planung/templates/planung/index.html
+++ b/plugins/planung/templates/planung/index.html
@@ -13,7 +13,7 @@
 <div class="mb-4 px-4 py-3 rounded-lg border bg-emerald-50 border-emerald-200 text-emerald-800 text-sm">{{ meldung }}</div>
 {% endif %}
 {% if fehler %}
-<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm">{{ fehler }}</div>
+<div class="mb-4 px-4 py-3 rounded-lg border bg-red-50 border-red-200 text-red-700 text-sm" role="alert" tabindex="-1">{{ fehler }}</div>
 {% endif %}
 
 <div class="bg-white border border-slate-200 rounded-xl shadow-sm p-4 mb-6">
@@ -22,7 +22,7 @@
   <form method="post" action="/planung/neu" class="grid grid-cols-1 gap-3 sm:flex sm:flex-wrap sm:items-end">
     <div class="sm:w-64 lg:w-72">
       <label for="titel" class="block text-xs font-medium text-slate-500 mb-1">Spieltitel *</label>
-      <input type="text" id="titel" name="titel" required
+      <input type="text" id="titel" name="titel" required aria-required="true"
              class="w-full min-h-[44px] border border-slate-300 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-emerald-500">
     </div>
     <div class="sm:w-48 lg:w-52">
diff --git a/src/redaktionskern/templates/benutzer/formular.html b/src/redaktionskern/templates/benutzer/formular.html
index 27560f8..f1440dc 100644
--- a/src/redaktionskern/templates/benutzer/formular.html
+++ b/src/redaktionskern/templates/benutzer/formular.html
@@ -6,7 +6,7 @@
 </h1>
 
 {% if fehler %}
-<div class="mb-4 max-w-lg rounded-lg border border-red-300 bg-red-50 text-red-700 text-sm px-3 py-2" role="alert">
+<div class="mb-4 max-w-lg rounded-lg border border-red-300 bg-red-50 text-red-700 text-sm px-3 py-2" role="alert" tabindex="-1" id="formular-fehler">
   {{ fehler }}
 </div>
 {% endif %}
@@ -17,7 +17,7 @@
 
   <div>
     <label for="username" class="block text-sm font-medium mb-1">Benutzername</label>
-    <input id="username" name="username" value="{{ form.username }}" required minlength="3"
+    <input id="username" name="username" value="{{ form.username }}" required aria-required="true" minlength="3"
            {% if aktion != 'neu' %}disabled{% endif %}
            class="w-full border border-slate-300 rounded-lg px-3 py-2 {% if aktion != 'neu' %}bg-slate-100{% endif %}">
     {% if aktion != 'neu' %}
@@ -62,7 +62,7 @@
     <label for="password" class="block text-sm font-medium mb-1">
       {% if aktion == 'neu' %}Passwort{% else %}Neues Passwort (leer = unver&auml;ndert){% endif %}
     </label>
-    <input id="password" name="password" type="password" {% if aktion == 'neu' %}required{% endif %} minlength="8"
+    <input id="password" name="password" type="password" {% if aktion == 'neu' %}required aria-required="true"{% endif %} minlength="8"
            class="w-full border border-slate-300 rounded-lg px-3 py-2">
   </div>
 
diff --git a/src/redaktionskern/templates/login.html b/src/redaktionskern/templates/login.html
index ba6d646..cf182b2 100644
--- a/src/redaktionskern/templates/login.html
+++ b/src/redaktionskern/templates/login.html
@@ -11,7 +11,7 @@
     <h1 class="text-xl font-bold mb-1 flex items-center gap-2">{% from "icons.html" import icon_wuerfelbecher %}{{ icon_wuerfelbecher("h-6 w-6 text-emerald-700") }} {{ app_name }}</h1>
     <p class="text-sm text-slate-500 mb-6">Bitte anmelden.</p>
     {% if fehler %}
-    <div class="mb-4 rounded-lg border border-red-300 bg-red-50 text-red-700 text-sm px-3 py-2" role="alert">
+    <div id="login-fehler" class="mb-4 rounded-lg border border-red-300 bg-red-50 text-red-700 text-sm px-3 py-2" role="alert" tabindex="-1">
       {{ fehler }}
     </div>
     {% endif %}
@@ -19,11 +19,13 @@
       <div>
         <label for="username" class="block text-sm font-medium mb-1">Benutzername</label>
         <input id="username" name="username" value="{{ username }}" required autocomplete="username"
+               {% if fehler %}aria-invalid="true" aria-describedby="login-fehler"{% endif %}
                class="w-full border border-slate-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-emerald-500">
       </div>
       <div>
         <label for="password" class="block text-sm font-medium mb-1">Passwort</label>
         <input id="password" name="password" type="password" required autocomplete="current-password"
+               {% if fehler %}aria-invalid="true" aria-describedby="login-fehler"{% endif %}
                class="w-full border border-slate-300 rounded-lg px-3 py-2 focus:outline-none focus:ring-2 focus:ring-emerald-500">
       </div>
       <button type="submit"