diff --git a/install-usercss/install-usercss.css b/install-usercss/install-usercss.css
index eb4df0a6..cb3c1dbc 100644
--- a/install-usercss/install-usercss.css
+++ b/install-usercss/install-usercss.css
@@ -119,3 +119,45 @@ h1 small {
.main .CodeMirror {
height: 100%;
}
+
+@media (max-width: 800px) {
+ .container {
+ flex-direction: column;
+ height: auto;
+ }
+
+ .header {
+ flex: 1 1 auto;
+ border-right: none;
+ border-bottom: 1px dashed #AAA;
+ }
+
+ .actions {
+ display: flex;
+ align-items: center;
+ justify-content: flex-start;
+ margin: 4px 0;
+ }
+ .actions label {
+ margin: 0 0 0 8px;
+ }
+
+ h1,
+ h3,
+ .meta-group {
+ margin: 12px 0;
+ }
+
+ h3 {
+ margin-bottom: 8px;
+ }
+
+ .main {
+ max-height: 100vh;
+ }
+
+ p,
+ ul {
+ margin: 8px 0;
+ }
+}