fix: button style for circles list admin

src/styles/circles.scss

@@ -73,6 +73,23 @@
     }
 }
 
+#admin-circles {
+    .add-member-button button {
+        background: var(--color-primary);
+        border: 2px solid var(--color-primary);
+        border-radius: 4px;
+        color: #fff;
+        display: inline-block;
+        font-size: 12px;
+        font-weight: 700;
+        margin: 10px 0;
+        padding: 8px 12px;
+        text-align: center;
+        text-transform: uppercase;
+    }
+
+}
+
 #circles-information {
     #circles-profile {
         background:  var(--color-bg-page);