body {
  margin: 0;
  background: linear-gradient(to bottom right, #0a0a0a, #1a1a1a);
  color: white;
  font-family: 'Poppins', sans-serif;
  text-align: center;
}
.screen { display: none; padding-top: 80px; }
.screen.active { display: block; }
.hidden { display: none; }

button {
  background: #0078ff;
  color: white;
  border: none;
  padding: 10px 20px;
  border-radius: 10px;
  font-size: 16px;
  margin: 10px;
  cursor: pointer;
  transition: 0.2s;
}
button:hover { background: #005fcc; }

#gameCanvas {
  background: #222;
  width: 90%;
  height: 400px;
  border-radius: 10px;
}

#chatBox {
  margin-top: 10px;
}
#messages {
  list-style: none;
  padding: 0;
  height: 120px;
  overflow-y: auto;
  background: rgba(255,255,255,0.1);
  border-radius: 10px;
}
#chatInput {
  width: 80%;
  padding: 8px;
  border: none;
  border-radius: 8px;
  margin-top: 5px;
}