/* Importar tipografía */
@import url('https://db.onlinewebfonts.com/c/2545d122b16126676225a5b52283ae23?family=VCR+OSD+Mono');

/* General */
body {
  margin: 0;
  font-family: 'VCR OSD Mono', monospace;
  background: url("https://64.media.tumblr.com/f2fb328c1483fe38d7c9ac78091db791/ed5459f354a9c245-f5/s540x810/21aa2e7bac9b6f40df69bdc66b3b4bc4b149e5ce.jpg") repeat;
  color: #ddd;
}

/* Header */
header {
  background: rgba(0, 0, 0, 0.0); /* opacidad */
  text-align: center;
  padding: 40px 10px 35px;
}

header h1 {
  font-size: 3em;
  color: #ff0000;
  text-shadow: 0 0 10px #b90000, 0 0 20px #000000;
  margin: 0;
  animation: blink 3.5s infinite;
}

@keyframes blink {
  0%, 100% { text-shadow: 0 0 10px #b90000, 0 0 20px #000000; }
  50% { text-shadow: 0 0 20px #ff0000, 0 0 40px #ff5555; }
}

/* Navegación */
nav {
  background: rgba(0, 0, 0, 0.4);
  text-align: center;
  padding: 10px;
}

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

nav a:hover {
  color: #ff0000;
  text-shadow: 0 0 5px #ff0000, 0 0 15px #ff5555;
}

/* Contenedor principal */
.container {
  display: flex;
  max-width: 1200px; /* más ancho para dos sidebars */
  margin: 20px auto;
  background: rgba(0, 0, 0, 0.5);
  border: 2px solid #444;
}

/* Sidebar izquierda */
aside.left {
  width: 20%;
  background: #000000;
  padding: 15px;
  border-right: 2px solid #444;
}

aside.left h2 {
  font-size: 1.2em;
  margin-bottom: 10px;
  border-bottom: 1px solid #555;
  padding-bottom: 5px;
  color: #fff;
}

aside.left ul {
  list-style: none;
  padding: 0;
}

aside.left ul li {
  margin: 8px 0;
}

/* Contenido principal */
main {
  flex: 1;
  padding: 20px;
  color: #ddd;
}

main h2 {
  margin-top: 0;
  font-size: 1.8em;
  color: #ff0000;
}

main h3 {
  margin-top: 20px;
  font-size: 1.3em;
  color: #ff0000;
}

/* Sidebar derecha */
aside.right {
  width: 20%;
  background: #000000;
  padding: 15px;
  border-left: 2px solid #444;
}

aside.right h2 {
  font-size: 1.2em;
  margin-bottom: 10px;
  border-bottom: 1px solid #555;
  padding-bottom: 5px;
  color: #fff;
}

aside.right ul {
  list-style: none;
  padding: 0;
}

aside.right ul li {
  margin: 8px 0;
}

/* Footer */
footer {
  background: #000000;
  text-align: center;
  padding: 10px;
  margin-top: 20px;
  font-size: 0.9em;
  color: #aaa;
}