/* Estilo base */
body {
  font-family: "Source Sans Pro", system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f7f7f7;
  color: #333;
}

/* Header y navegación */
header {
  background-color: #0066cc;
  color: white;
  padding: 1rem;
  text-align: center;
}

nav ul {
  list-style: none;
  padding: 0;
  margin: 1rem 0 0 0;
  display: flex;
  justify-content: center;
  gap: 1rem;
}

nav a {
  text-decoration: none;
  color: white;
  background-color: #004c99;
  padding: 0.75rem 1rem;
  border-radius: 8px;
  display: inline-block;
  font-size: 1rem;
  transition: background-color 0.3s ease;
}

/* Accesibilidad táctil: tamaño mínimo 48x48px */
nav a {
  min-width: 48px;
  min-height: 48px;
}

nav a:hover,
nav a:focus {
  background-color: #003366;
}

/* Contenido principal */
main {
  padding: 1.5rem;
}

/* Footer */
footer {
  background-color: #222;
  color: #ccc;
  text-align: center;
  padding: 1rem;
}