html, body {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: black;
  color: white;
  font-family: monospace;
}

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

header {
  position: fixed;
  top: 0;
  width: 100%;
  text-align: center;
  padding: 12px 0;
  background: rgba(0,0,0,0.6);
  z-index: 2;
}

main {
  position: relative;
  z-index: 2;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
}

.blink {
  font-size: 4rem;
  animation: blink 1s step-start infinite;
}

.bold {
  font-weight: bold;
  font-size: 2rem;
}

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}