diff --git a/src/app/globals.css b/src/app/globals.css
index bd8db5d..9016759 100644
--- a/src/app/globals.css
+++ b/src/app/globals.css
@@ -383,17 +383,18 @@ p  { font-size: 1rem; line-height: 1.6; color: var(--foreground); }
     display: none;
     flex-direction: column;
     gap: 0.5rem;
-    position: absolute;
-    top: 100%;
+    position: fixed;
+    top: calc(60px + 6px);
     left: 0;
     right: 0;
+    bottom: 0;
     width: 100%;
+    height: calc(100vh - 60px - 6px);
     background: #ffffff;
     border-bottom: 1px solid var(--color-border);
     box-shadow: 0 8px 20px rgba(0,0,0,0.1);
     padding: 1rem;
     z-index: 100;
-    max-height: calc(100vh - 80px);
     overflow-y: auto;
   }
   .nav-list[data-expanded="true"] {