diff --git a/2025/css/main.css b/2025/css/main.css
new file mode 100644
index 0000000..a7a0278
--- /dev/null
+++ b/2025/css/main.css
@@ -0,0 +1,15 @@
+body {
+  margin: 0;
+  font-family: system-ui, sans-serif;
+  background-color: #f8f8f8;
+  color: #222;
+  text-align: center;
+}
+
+.kalenderbild img {
+  max-width: 100%;
+  height: auto;
+  display: block;
+  margin: 0 auto;
+  border-radius: 8px;
+}
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