diff --git a/inst/content/style.css b/inst/content/style.css
index 1085b71..eff7679 100644
--- a/inst/content/style.css
+++ b/inst/content/style.css
@@ -40,4 +40,18 @@ h5 {
 .container img {
     max-width: 100%;
     height: auto;
+}
+
+/* Undo changes in Bootstrap theme */
+.nav-underline .nav-link {
+    border-bottom: 0;
+}
+
+/* Fix slider inputs floating above dropdown menu */
+.irs--shiny .irs-bar {
+    z-index: 1;
+}
+
+.irs--shiny .irs-handle {
+    z-index: 1;
 }
\ No newline at end of file