body {
  margin: 0;
  background: #000;
  color: #e0e0e0;
  font-family: 'Courier New', monospace;
  overflow: hidden;
}

/* Header / Logo */
.gx4ub-header {
  text-align: center;
  margin-top: 40px;
}
.logo {
  font-size: 3em;
  letter-spacing: 0.1em;
  background: linear-gradient(90deg, #ff004c, #00ff88, #00e5ff, #a060ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 15px #ff004c, 0 0 25px #00ff88, 0 0 35px #00e5ff;
}
.logo span {
  font-weight: bold;
}
.tagline {
  margin-top: 8px;
  font-size: 0.9em;
  color: #888;
  letter-spacing: 0.15em;
}

/* Grid Menu */
.gx4ub-grid {
  margin: 60px auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  max-width: 900px;
  padding: 0 20px;
}
.gx4ub-card {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 25px;
  border-radius: 12px;
  background: rgba(20,20,20,0.85);
  border: 1px solid rgba(0,255,150,0.3);
  color: #0f0;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  box-shadow: 0 0 12px rgba(0,255,150,0.4);
  transition: transform 0.15s ease, box-shadow 0.2s ease;
}
.gx4ub-card:hover {
  transform: translateY(-4px) scale(1.05);
  box-shadow: 0 0 20px #0ff, 0 0 30px #0f0;
  background: rgba(30,30,30,0.95);
}

/* Footer */
.gx4ub-footer {
  text-align: center;
  padding: 20px;
  font-size: 0.8em;
  color: #666;
  border-top: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.6);
  position: fixed;
  bottom: 0;
  width: 100%;
}

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