diff --git a/app/static/css/default.css b/app/static/css/default.css
index 19b9961..f6eedd6 100644
--- a/app/static/css/default.css
+++ b/app/static/css/default.css
@@ -97,6 +97,15 @@ div#navbarNavfooter li.nav-item{
   margin-right: 6px;
 }
 
-main{
-  position: relative; box-shadow: 0 0 20px rgba(0,0,0,0.3); overflow: visible;
-}
\ No newline at end of file
+main {
+  position: relative;
+  box-shadow: 
+    /* Innerer Schatten */
+    inset 10px 0 10px -10px rgba(0, 0, 0, 0.3),  /* linker innerer Schatten */
+    inset -10px 0 10px -10px rgba(0, 0, 0, 0.3), /* rechter innerer Schatten */
+    /* Äußerer Schatten */
+    10px 0 10px -10px rgba(0, 0, 0, 0.3),  /* rechter äußerer Schatten */
+    -10px 0 10px -10px rgba(0, 0, 0, 0.3); /* linker äußerer Schatten */
+  overflow: visible;
+}
+