Many improvements

common/main.css

@@ -1,15 +1,73 @@
+:root {
+  --dark-accent-color: #5C6BC0;
+  --dark-bg-color: #121212;
+  --dark-alt-bg-color: #5c6bc0;
+  --dark-text-color: #eeeeee;
+  --dark-btn-color: #303f9f
+}
+
 body {
   font-family: "Noto Sans", "Liberation Sans","Trebuchet MS", Arial, Helvetica, sans-serif;
+  margin: 0;
+  --accent-color: #1A237E;
+  --bg-color: none;
+  --alt-bg-color: #283593;
+  --text-color: black;
+  --btn-color: #303f9f;
+
+  background-color: var(--bg-color);
+  color: var(--text-color);
 }
+header{
+  padding: 0.5rem;
+}
+.header-list{
+  align-items: center;
+  justify-content: center;
+  margin: auto;
+  min-height: 2rem;
+  display: flex;
+  flex-wrap: wrap;
+  list-style: none;
+  gap: 1rem;
+}
+
+.tab-button{
+  padding: 0.5rem 1rem;
+  border-radius: .25rem;
+  text-decoration: underline;
+  font-weight: 600;
+  transition: 0.15s;
+  color: var(--text-accent-color);
+}
+.tab-button.active{
+  color: #fff;
+  background-color: var(--btn-color); 
+
+}
+.tab-button:focus {
+  transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
+  outline: none;
+  box-shadow: 0 0 2px 2px var(--accent-color), 0 .5rem 1rem rgba(0,0,0,.15) !important;
+}
+.tab-button:hover {
+  box-shadow: 0 .5rem 1rem rgba(0,0,0,.15);
+  background-color: var(--btn-color);
+  box-shadow: 0 0 2px 2px var(--accent-color), 0 .5rem 1rem rgba(0,0,0,.15) !important;
+
+}
+
 
 /* Container for main content */
 .cont {
   margin: auto;
-  width: max-content;
 }
 
 .service-list {
+  padding: 0;
   display: flex;
+  flex-wrap: wrap;
+  justify-content: center;
   list-style: none;
   gap: 1rem;
 }
@@ -26,20 +84,38 @@ body {
 }
 
 .service-list li:hover {
-    box-shadow: 0 1px 1px rgba(0,0,0,0.11), 
-              0 2px 2px rgba(0,0,0,0.11), 
-              0 4px 4px rgba(0,0,0,0.11), 
-              0 8px 8px rgba(0,0,0,0.11), 
-              0 16px 16px rgba(0,0,0,0.11), 
-              0 32px 32px rgba(0,0,0,0.11);
+  transition: color .15s ease-in-out,background-color .15s ease-in-out,border-color .15s ease-in-out,box-shadow .15s ease-in-out;
+  box-shadow: 0 0 2px 2px var(--accent-color), 0 .5rem 1rem rgba(0,0,0,.15) !important;
+
 }
 
+
 .service-list li a {
   display: block;
   width: 100%;
   height: 100%;
   text-align: center;
+  vertical-align:middle;
 }
 
 #li-nextcloud { background-image: url(./icons/Nextcloud_Logo.svg); }
 #li-matrix { background-image: url(./icons/Matrix_Logo.svg); }
+
+@media only screen and (min-width:1000px){
+  .cont {
+    width: 80%;
+  }
+}
+
+@media (prefers-color-scheme: dark) {
+  body.theme-auto {
+    --bg-color: var(--dark-bg-color);
+    --alt-bg-color: var(--dark-alt-bg-color);
+    --text-color: var(--dark-text-color);
+    --btn-color: var(--dark-btn-color);
+    --accent-color: var(--dark-accent-color);
+    }    
+    #li-nextcloud {  }
+    #li-matrix { filter: invert(); }
+    
+}