Add kumos.

static/main.css

@@ -1169,10 +1169,68 @@ header div:first-child {
 
 .iframe {
     padding: 1rem;
+    font-size: medium;
 }
 
-.iframe p {
-    font-size: medium;
+/* KumOS */
+
+.window {
+  position: absolute;
+  z-index: 9;
+  /* background-color: #f1f1f1; */
+  width: 300px;
+  height: 300px;
+  display: flex;
+  flex-direction: column;
+  resize: both;
+  overflow: hidden;
+}
+
+.windowHeader {
+  padding: 10px;
+  cursor: move;
+  z-index: 10;
+  background-color: rgba(0, 0, 0, 0.6);
+  color: #fff;
+  flex: 0 0 auto;
+}
+
+.windowContent {
+  width: 100%;
+  height: 100%;
+  flex: 1 1 auto;
+  border: 0;
+}
+
+.windowContent {
+  overflow: hidden;
+  display: flex;
+  flex-direction: column;
+  background-color: black;
+}
+
+.windowHeader {
+    display: flex;
+}
+
+.windowHeaderTitle {
+    margin: 0px;
+    margin-right: auto;
+}
+
+.kumosBar {
+    position: fixed;
+    left: 0;
+    bottom: 0;
+    width: 100%;
+    background-color: var(--theme-color);
+    padding: .4em;
+    display: flex;
+    gap: 1em;
+}
+
+.kumosBar * {
+    height: 100%;
 }
 
 /* Animations */