body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background: linear-gradient(to right, #e0eafc, #cfdef3);
  color: #333;
  text-align: center;
  min-height: 100vh;
}
.container, .welcome-container, .chat-container {
  padding: 2rem;
  max-width: 400px;
  margin: auto;
  background: rgba(255,255,255,0.9);
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.1);
  margin-top: 5rem;
}
h1, h2 { margin-bottom: 1rem; color: #444; }
input, select, button {
  width: 100%;
  margin: .5rem 0;
  padding: .75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
}
button, .btn {
  background: #6c63ff;
  color: white;
  font-size: 1rem;
  padding: .75rem 1.5rem;
  border: none;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  border-radius: 6px;
  transition: background 0.3s;
}
button:hover, .btn:hover {
  background: #574b90;
}