fix: input alignment

src/pages/GamePage.css

@@ -288,6 +288,7 @@
 
 .input-container {
   display: flex;
+  align-items: center;
   gap: 0.75rem;
   padding: 1rem 1.5rem 1.5rem;
   background: #131313;
@@ -296,6 +297,8 @@
 
 .input-container textarea {
   flex: 1;
+  min-height: 50px;
+  max-height: 120px;
   padding: 0.875rem 1rem;
   background: #1a1a1a;
   border: 2px solid #333;
@@ -318,6 +321,7 @@
 
 .send-btn {
   width: 50px;
+  min-width: 50px;
   height: 50px;
   background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
   border: none;
@@ -328,7 +332,7 @@
   transition:
     transform 0.2s,
     opacity 0.2s;
-  align-self: flex-end;
+  flex-shrink: 0;
 }
 
 .send-btn:hover:not(:disabled) {