body.theme-dark {
  background: #020617;
  color: #fff;
}
body.theme-light {
  background: #f1f5f9;
  color: #020617;
}
.video-bg {
  position: fixed;
  inset: 0;
  overflow: hidden;
  z-index: -2;
}
.video-bg iframe {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.video-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at top, rgba(15,23,42,0.3), rgba(15,23,42,0.9));
  z-index: -1;
}
.app-shell {
  max-width: 1200px;
}
.app-card {
  background: rgba(15,23,42,0.92);
}
.theme-light .app-card {
  background: rgba(255,255,255,0.92);
}
.btn-primary {
  background: var(--primary-color);
}