/* Estilos básicos */
html, body {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

/* Controles */
#controls {
  padding: 10px;
  background: #f0f0f0;
}
#controls input[type="text"],
#controls input[type="file"],
#controls button {
  margin-right: 8px;
  padding: 4px 8px;
  font-size: 14px;
}

/* Canvas de la ruleta */
#wheel {
  display: block;
  margin: 20px auto;
  border: 2px solid #333;
  border-radius: 50%;
  background: #fff;
}