/* Fondo degradado animado estilo Apple / ChatGPT */
body {
  background: linear-gradient(-45deg, #f9fbff, #eef3ff, #fdfdfd, #e6f0ff);
  background-size: 400% 400%;
  animation: gradientMove 18s ease infinite;
  color: #0f172a;
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@keyframes gradientMove {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}