Create style.css

css/style.css

@@ -0,0 +1,20 @@
+* {
+  margin: 0;
+  padding: 0;
+  box-sizing: border-box;
+}
+
+html, body {
+  height: 100%;
+  overflow: hidden;
+}
+
+#bg-video {
+  position: fixed;
+  top: 0;
+  left: 0;
+  min-width: 100%;
+  min-height: 100%;
+  object-fit: cover;
+  z-index: -1;
+}