/* Scroll reveal — smooth and understated */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal-stagger.visible > *:nth-child(1) { transition-delay: 0ms; }
.reveal-stagger.visible > *:nth-child(2) { transition-delay: 80ms; }
.reveal-stagger.visible > *:nth-child(3) { transition-delay: 160ms; }
.reveal-stagger.visible > *:nth-child(4) { transition-delay: 240ms; }
.reveal-stagger.visible > *:nth-child(5) { transition-delay: 320ms; }
.reveal-stagger.visible > *:nth-child(6) { transition-delay: 400ms; }
.reveal-stagger.visible > *:nth-child(7) { transition-delay: 480ms; }
.reveal-stagger.visible > *:nth-child(8) { transition-delay: 560ms; }
.reveal-stagger.visible > *:nth-child(9) { transition-delay: 640ms; }
.reveal-stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Gentle float for SVG nodes */
@keyframes nodeFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}
.node-float { animation: nodeFloat 5s ease-in-out infinite; }
.node-float:nth-child(even) { animation-delay: -2.5s; }

/* Link underline slide */
.link-underline { position: relative; }
.link-underline::after {
  content: ''; position: absolute;
  bottom: -2px; left: 0; width: 0; height: 1.5px;
  background: var(--secondary);
  transition: width var(--transition);
}
.link-underline:hover::after { width: 100%; }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .reveal, .reveal-stagger > * {
    opacity: 1; transform: none;
  }
  html { scroll-behavior: auto; }
}