diff --git a/assets/css/festive.css b/assets/css/festive.css
new file mode 100644
index 0000000..653926f
--- /dev/null
+++ b/assets/css/festive.css
@@ -0,0 +1,39 @@
+/* Feste Feiertage */
+body.festive-advent,
+body.festive-christmas {
+    color: #fff;
+}
+
+body.festive-halloween {
+    color: #ff6200;
+}
+
+@keyframes festive-birthday-bg {
+    0% { background-position: 0% 50%; }
+    50% { background-position: 100% 50%; }
+    100% { background-position: 0% 50%; }
+}
+
+/* Allgemeiner Container für den Shortcode/Widget */
+.fsp-today {
+    background: rgba(255, 255, 255, 0.25);
+    padding: 25px;
+    border-radius: 16px;
+    text-align: center;
+    font-size: 1.8em;
+    margin: 30px 0;
+}
+
+body.festive-birthday img {
+    filter: drop-shadow(0 5px 10px rgba(0, 0, 0, 0.2));
+}
+
+/* Weihnachtsstern */
+body.festive-christmas img[src*="gold-star.png"] {
+    animation: twinkle 3s infinite alternate;
+}
+
+@keyframes twinkle {
+    0% { opacity: 0.5; transform: scale(0.8); }
+    100% { opacity: 1; transform: scale(1.2); }
+}
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