diff --git a/src/app.css b/src/app.css
index 76d09ab..044d280 100644
--- a/src/app.css
+++ b/src/app.css
@@ -90,6 +90,18 @@
     --color-fire-900: #981b18;
     --color-fire-950: #5d0f0b;
 
+    /* Palette: Gelb (Signal / Warnung / Aufmerksamkeit) */
+    --color-gelb-50: #fefce8;
+    --color-gelb-100: #fef9c3;
+    --color-gelb-200: #fef08a;
+    --color-gelb-300: #fde047;
+    --color-gelb-400: #facc15;
+    --color-gelb-500: #eab308;
+    --color-gelb-600: #ca8a04;
+    --color-gelb-700: #a16207;
+    --color-gelb-800: #854d0e;
+    --color-gelb-900: #713f12;
+
     /* Palette: Stein (Neutrals) */
     --color-stein-0: #ffffff;
     --color-stein-50: #f7f8f7;
@@ -351,7 +363,8 @@ main ol:not(.not-prose):where(:not(.not-prose *)) li {
 .btn-primary,
 .btn-secondary,
 .btn-tertiary,
-.btn-outline {
+.btn-outline,
+.btn-warning {
     @apply inline-flex items-center gap-1 no-underline whitespace-nowrap transition-colors duration-200 font-medium px-4 py-2 rounded-xs;
 }
 
@@ -391,6 +404,15 @@ main ol:not(.not-prose):where(:not(.not-prose *)) li {
     @apply bg-stein-100;
 }
 
+/* Buttons – Gelb (Signal / Aufmerksamkeit, z. B. Termin melden) */
+.btn-warning {
+    @apply border border-gelb-500 bg-gelb-300 text-gelb-900 shadow-sm;
+}
+
+.btn-warning:hover {
+    @apply bg-gelb-400;
+}
+
 /* Größen-Modifier — nach den btn-* definiert damit override greift */
 .btn-sm {
     @apply px-2 py-1 text-xs gap-1;
diff --git a/src/lib/components/blocks/CalendarBlock.svelte b/src/lib/components/blocks/CalendarBlock.svelte
index 5f1a61c..4daa39b 100644
--- a/src/lib/components/blocks/CalendarBlock.svelte
+++ b/src/lib/components/blocks/CalendarBlock.svelte
@@ -965,8 +965,7 @@
         >
             <a
                 href="/termin-melden"
-                class="btn-sm inline-flex items-center gap-1.5 min-h-[36px] rounded-md border px-3 font-semibold no-underline"
-                style="background:#fde047;border-color:#eab308;color:#713f12"
+                class="btn-warning btn-sm inline-flex items-center gap-1.5 min-h-[36px]"
             >
                 <Icon icon="lucide:plus" class="size-3.5 shrink-0" aria-hidden="true" />
                 Termin melden