/* Fuente típica de la época */
body {
  font-family: Verdana, Arial, sans-serif;
  background: #f2f2f2 url('8000.jpg') repeat-y center top;
  color: #000;
  margin: 0;
  padding: 0;
}

/* Contenedor centrado */
#container {
  width: 960px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #ccc;
  box-shadow: 0px 0px 8px #888;
  padding: 20px;
}

/* Cabecera con degradado */
header {
  background: linear-gradient(to bottom, #003399 0%, #001f4d 100%);
  color: white;
  padding: 20px;
  text-align: center;
  border-bottom: 4px solid #0059b3;
}

header h1 {
  margin: 0;
  font-size: 32px;
  letter-spacing: 2px;
  text-shadow: 2px 2px 3px #000;
}

/* Barra de navegación horizontal */
nav {
  background: #0066cc;
  padding: 10px;
  border-top: 1px solid #004080;
  border-bottom: 2px solid #003366;
  text-align: center;
}

nav a {
  color: white;
  text-decoration: none;
  margin: 0 15px;
  font-weight: bold;
}

nav a:hover {
  text-decoration: underline;
  background-color: #004080;
  padding: 5px;
  border-radius: 3px;
}

/* Contenido principal */
main {
  padding: 20px;
  background: #fafafa;
  border: 1px solid #ddd;
  margin-top: 20px;
}

/* Módulos o cajas */
.box {
  border: 1px solid #aaa;
  background: #e6e6e6;
  padding: 15px;
  margin-bottom: 20px;
  box-shadow: inset 0 0 5px #bbb;
}

/* Footer clásico */
footer {
  text-align: center;
  font-size: 13px;
  color: #666;
  border-top: 1px solid #ccc;
  padding: 15px;
  background: #e0e0e0;
  margin-top: 30px;
}