feat: Implement dark theme with expandable consultant details and animations

styles.css

@@ -1,7 +1,7 @@
 body {
     font-family: Arial, sans-serif;
-    background-color: #fff;
-    color: #000;
+    background-color: #000;
+    color: #fff;
     margin: 0;
     padding: 0;
 }
@@ -15,10 +15,41 @@ header, footer {
 
 main {
     padding: 2em;
+    display: flex;
+    justify-content: space-around;
 }
 
 .consultant {
-    border: 1px solid #000;
-    margin: 1em 0;
+    border: 1px solid #fff;
+    margin: 1em;
     padding: 1em;
+    width: 30%;
+    cursor: pointer;
+    transition: opacity 0.3s ease;
+}
+
+.consultant:hover {
+    opacity: 0.7;
+}
+
+.consultant.active {
+    opacity: 1;
+}
+
+.consultant-details {
+    display: none;
+    background-color: #111;
+    padding: 1em;
+    margin-top: 1em;
+    width: 80%;
+    animation: expand 0.5s ease-out forwards;
+}
+
+@keyframes expand {
+    from {
+        max-height: 0;
+    }
+    to {
+        max-height: 500px;
+    }
 }