feat: coordinate message padding and input shape

styles.css

@@ -63,14 +63,6 @@ body {
         padding: 0;
         visibility: hidden;
     }
-
-    #side-panel .conversation {
-        max-width: 300px;
-    }
-
-    #main-panel {
-        width: calc(100% - 300px);
-    }
 }
 
 #side-panel .conversation {
@@ -156,6 +148,7 @@ h1 {
 
     right: 0;
     margin-bottom: 0.5em;
+
     border-bottom-right-radius: 0;
 }