/* Fuente general */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 0;
  background: #f9f9f9;
  color: #333;
}

/* Encabezado */
header {
  background-color: #111;
  color: yellow;
  padding: 30px 20px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

/* Títulos */
h1 {
  font-size: 2.5em;
  margin: 0;
}

h2 {
  color: #222;
  border-left: 6px solid yellow;
  padding-left: 10px;
  margin-top: 30px;
  font-size: 1.4em;
}

/* Contenido principal */
main {
  max-width: 900px;
  margin: 40px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.08);
}

/* Secciones */
section {
  margin-bottom: 30px;
}

/* Enlaces */
a {
  color: #0066cc;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background-color: #111;
  color: #ddd;
  padding: 20px;
  text-align: center;
  font-size: 0.9em;
}

 .btn-volver {
  display: inline-block;
  padding: 12px 25px;
  background-color: #ff9800;
  color: white;
  font-weight: bold;
  text-decoration: none;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.2);
  font-size: 16px;
  transition: all 0.3s ease;
}
.btn-volver:hover {
  background-color: #e68900;
  transform: translateY(-2px);
}