fixed the send button, finally.

front_files/index.css

@@ -117,7 +117,7 @@ body {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  width: 100%;
+  width: auto;
   padding: 14px 20px;
   border-radius: 999px;
   border: none;
@@ -146,6 +146,10 @@ body {
   box-shadow: 0 6px 16px rgba(0, 0, 0, 0.4);
 }
 
+.actions .btn {
+  width: 100%;
+}
+
 .btn-secondary {
   background: var(--secondary);
   color: var(--secondary-text);
@@ -267,12 +271,41 @@ body {
 
 .chat-input-row {
   display: flex;
-  gap: 8px;
+  gap: 10px;
+  align-items: center;
+  background: rgba(3, 12, 24, 0.7);
+  border-radius: 22px;
+  padding: 4px 6px 4px 12px;
+  border: 1px solid rgba(255, 255, 255, 0.08);
 }
 
 .chat-input-row .input {
-  flex: 1;
+  flex: 1 1 auto;
+  min-width: 0;
   margin-bottom: 0;
+  border: none;
+  background: transparent;
+  height: 44px;
+  line-height: 44px;
+  padding: 0;
+}
+
+.chat-send-btn {
+  width: 44px;
+  min-width: 44px;
+  height: 44px;
+  padding: 0;
+  border-radius: 14px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  box-shadow: none;
+}
+
+.chat-send-btn .send-icon {
+  width: 18px;
+  height: 18px;
+  fill: currentColor;
 }
 
 .chat-message {

front_files/index.html

@@ -52,9 +52,14 @@
                 <div class="chat-log" id="chat-log"></div>
 
                 <form class="chat-input-row" id="chat-form">
-                    <input type="text" id="chat-input" class="input chat-input" placeholder="Type a message..." autocomplete="off" />
+                    <input type="text" id="chat-input" class="input chat-input" placeholder="Type a message..."
-                    <button class="btn btn-primary" id="chat-send-btn">
+                        autocomplete="off" />
-                        Send
+                    <button class="btnx btn-primary chat-send-btn" id="chat-send-btn" aria-label="Send message"
+                        type="submit">
+                        <svg class="send-icon" viewBox="0 0 24 24" aria-hidden="true">
+                            <path
+                                d="M3.4 20.6c-.5.2-.9-.3-.7-.8l3-8.2c.1-.3 0-.7-.2-.9l-3-3.4c-.4-.5 0-1.3.7-1.1l18.5 6.2c.6.2.6 1 0 1.2L3.4 20.6zm3.5-9.3c.7.7 1.1 1.6.9 2.5l-1 3 10.8-4-10.7-3.5z" />
+                        </svg>
                     </button>
                 </form>
             </section>