:root {
  --accent: #c7ff0c; /* Electric Lime */
}
body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: 'Press Start 2P', cursive;
  color: #fff;
  text-align: center;
  background: url("background.jpg") no-repeat center center fixed;
  background-size: cover;
}
/* Dark overlay */
.overlay {
  background: rgba(0,0,0,0.7);
  padding: 3rem 2rem;
  border-radius: 20px;
  box-shadow: 0 0 30px rgba(0,0,0,0.8);
  max-width: 1000px;
  width: 90%;
}
h1 {
  margin-bottom: 2rem;
  font-size: 2rem;
  color: var(--accent);
  text-shadow: 0 0 5px var(--accent), 0 0 10px var(--accent);
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.5rem;
}
a.button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 1.5rem;
  text-decoration: none;
  font-size: 0.9rem;
  text-transform: uppercase;
  border-radius: 14px;
  border: 2px solid var(--accent);
  color: var(--accent);
  background: rgba(0,0,0,0.6);
  box-shadow: 0 0 8px var(--accent), 0 0 20px rgba(199,255,12,0.6);
  transition: all 0.3s ease;
  animation: pulse 3s infinite;
}
a.button:hover {
  background: var(--accent);
  color: #000;
  transform: scale(1.05);
  box-shadow: 0 0 15px var(--accent), 0 0 40px var(--accent);
}
@keyframes pulse {
  0% { box-shadow: 0 0 8px var(--accent), 0 0 20px rgba(199,255,12,0.5); }
  50% { box-shadow: 0 0 20px var(--accent), 0 0 50px rgba(199,255,12,0.8); }
  100% { box-shadow: 0 0 8px var(--accent), 0 0 20px rgba(199,255,12,0.5); }
}
/* Navigation Bar */
.navbar {
  position: absolute;
  top: 20px;
  left: 20px;
  display: flex;
  gap: 1rem;
  background: rgba(0,0,0,0.6);
  padding: 0.8rem 1.2rem;
  border-radius: 12px;
  box-shadow: 0 0 8px var(--accent), 0 0 15px rgba(199,255,12,0.6);
}
.navbar a {
  text-decoration: none;
  font-size: 0.8rem;
  color: var(--accent);
  font-weight: bold;
  text-transform: uppercase;
  transition: color 0.2s, text-shadow 0.2s, background 0.2s;
}
.navbar a:hover {
  color: #000;
  background: var(--accent);
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  text-shadow: none;
}