* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: url("papelparede.jpg") no-repeat center center fixed;
  background-size: cover;
  overflow: hidden;
  font-family: 'Courier New', monospace;
}

canvas {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1;
}

.overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2;
  background: rgba(0, 0, 0, 0.35);
}

h1 {
  color: #00ff66;
  font-size: 2.2rem;
  text-align: center;
  max-width: 80%;
  text-shadow:
    0 0 5px #00ff66,
    0 0 15px #00ff66;
  animation: glitch 1.5s infinite;
}

@keyframes glitch {
  0% { opacity: 1; }
  50% { opacity: 0.85; transform: translateX(-1px); }
  100% { opacity: 1; }
}