body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: 'Arial Black', sans-serif;
  color: white;
}

body {
  background: url('background.jpg') no-repeat center center fixed;
  background-size: cover;
}

.overlay {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  background: rgba(0,0,0,0.35);
}

.center {
  margin-top: 20vh;
}

h1, h2 {
  margin: 0.5em 0;
  font-size: 3em;
  letter-spacing: 3px;
  position: relative;
}

h1 {
  font-size: 5em;
}

.glitch {
  position: relative;
  color: #fff;
  text-shadow: 2px 0 red, -2px 0 cyan;
  animation: glitch 2s infinite;
}

@keyframes glitch {
  0% { text-shadow: 2px 0 red, -2px 0 cyan; }
  20% { text-shadow: -2px 0 red, 2px 0 cyan; }
  40% { text-shadow: 2px 0 red, -2px 0 cyan; }
  60% { text-shadow: -2px -2px red, 2px 2px cyan; }
  80% { text-shadow: 2px 2px red, -2px -2px cyan; }
  100% { text-shadow: 2px 0 red, -2px 0 cyan; }
}

footer {
  margin-bottom: 20px;
  font-size: 0.9em;
  opacity: 0.8;
}