body[data-theme="matrix"] { background: #000; }
body[data-theme="matrix"] .matrix-canvas {
  position: fixed; inset: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  image-rendering: pixelated;
}
body[data-theme="matrix"] .profile-card {
  box-shadow: 0 0 calc(30px + 50px * var(--bass, 0)) rgba(0, 255, 80, .7);
  border: 1px solid rgba(0, 255, 80, .5);
  transform: scale(calc(1 + 0.03 * var(--beat, 0)));
  transition: transform .08s linear;
}
body[data-theme="matrix"] .profile-card h1 { color: #5cff7f; text-shadow: 0 0 8px #5cff7f; }