co-created html and css for the chat page

front_files/index.css

@@ -190,6 +190,80 @@ body {
   flex-direction: column;
 }
 
+.hidden {
+  display: none !important;
+}
+
+/* Chat layout */
+
+#chat-card {
+  display: flex;
+  flex-direction: column;
+  gap: 10px;
+}
+
+.chat-header {
+  display: flex;
+  justify-content: space-between;
+  align-items: center;
+  gap: 12px;
+  margin-bottom: 4px;
+}
+
+.chat-session {
+  font-size: 0.85rem;
+  color: var(--muted);
+}
+
+.chat-log {
+  flex: 1;
+  min-height: 180px;
+  max-height: 320px;
+  margin-bottom: 8px;
+  padding: 12px;
+  border-radius: 10px;
+  background: rgba(3, 16, 32, 0.65);
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.chat-input-row {
+  display: flex;
+  gap: 8px;
+}
+
+.chat-input-row .input {
+  flex: 1;
+  margin-bottom: 0;
+}
+
+.chat-message {
+  padding: 8px 10px;
+  border-radius: 14px;
+  font-size: 0.9rem;
+  max-width: 80%;
+}
+
+.chat-message.me {
+  align-self: flex-end;
+  background: var(--primary);
+  color: #ffffff;
+}
+
+.chat-message.them {
+  align-self: flex-start;
+  background: rgba(255, 255, 255, 0.06);
+}
+
+.chat-message.system {
+  align-self: center;
+  background: transparent;
+  color: var(--muted);
+  font-size: 0.8rem;
+}
+
 /* Responsive tweaks */
 
 @media (max-width: 480px) {

front_files/index.html

@@ -17,7 +17,7 @@
         </header>
 
         <main class="app-main">
-            <section class="card">
+            <section class="card" id="landing-card">
                 <div class="actions">
                     <button class="btn btn-primary" id="create-session-btn">
                         Create a session
@@ -34,6 +34,24 @@
                     </div>
                 </div>
             </section>
+
+            <section class="card hidden" id="chat-card">
+                <div class="chat-header">
+                    <div class="chat-session" id="chat-session-info"></div>
+                    <button class="btn btn-secondary" id="leave-session-btn">
+                        Leave session
+                    </button>
+                </div>
+
+                <div class="chat-log" id="chat-log"></div>
+
+                <form class="chat-input-row" id="chat-form">
+                    <input type="text" id="chat-input" class="input" placeholder="Type a message..." autocomplete="off" />
+                    <button class="btn btn-primary" id="chat-send-btn">
+                        Send
+                    </button>
+                </form>
+            </section>
         </main>
     </div>