Improve link colors for dark mode visibility

Added CSS variables for link colors with better contrast:
- Light mode: #0066cc (normal), #004499 (hover)
- Dark mode: #58a6ff (normal), #79b8ff (hover)

Applied general link styling rules that adapt to both themes,
ensuring links are clearly visible and distinguishable in dark mode.

templates/base.html

@@ -48,6 +48,8 @@
         --text-info: #0066cc;
         --text-success: #008800;
         --text-error: #cc0000;
+        --link-color: #0066cc;
+        --link-hover: #004499;
         --border-color: #e1e1e1;
         --border-color-dark: #ced4da;
         --border-code: #ccc;
@@ -75,6 +77,8 @@
         --text-info: #4da3ff;
         --text-success: #5fcc5f;
         --text-error: #ff6b6b;
+        --link-color: #58a6ff;
+        --link-hover: #79b8ff;
         --border-color: #404040;
         --border-color-dark: #4a4a4a;
         --border-code: #555;
@@ -323,13 +327,28 @@
         transition: background-color 0.3s ease, border-color 0.3s ease;
     }
 
+    /* General link styling */
+    a {
+        color: var(--link-color);
+        text-decoration: none;
+        transition: color 0.3s ease;
+    }
+
+    a:hover {
+        color: var(--link-hover);
+        text-decoration: underline;
+    }
+
     /* Styling for links in the rooms list */
     #rooms-list a {
-        text-decoration: none; /* Optional: Removes underline from links */
-        color: var(--text-primary); /* Ensures link color matches the text color */
+        color: var(--link-color);
         transition: color 0.3s ease;
     }
 
+    #rooms-list a:hover {
+        color: var(--link-hover);
+    }
+
     .hljs {
         position: relative;
         padding-left: 46px !important;