:root {
  --ease-standard: cubic-bezier(0.2, 0.8, 0.2, 1);
  --ease-emphasized: cubic-bezier(0.16, 1, 0.3, 1);
  --duration-fast: 140ms;
  --duration-base: 220ms;
  --duration-slow: 420ms;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }

  body {
    animation: page-fade-in var(--duration-slow) var(--ease-emphasized) both;
  }

  .site-header {
    transform: translateZ(0);
  }

  .brand,
  .nav a,
  a,
  .button,
  .filter,
  .project-card,
  .case-study,
  .summary > div,
  .stack-list > div,
  .cv-card,
  .profile-panel {
    backface-visibility: hidden;
    transform: translateZ(0);
  }

  .brand,
  .nav a,
  a {
    transition:
      opacity var(--duration-fast) var(--ease-standard);
  }

  .nav a:hover,
  .profile-links a:hover,
  .project-card a:hover,
  .case-study a:hover,
  .link-row a:hover {
    opacity: 0.74;
  }

  .button,
  .filter {
    transition:
      opacity var(--duration-fast) var(--ease-standard),
      transform var(--duration-fast) var(--ease-standard);
    will-change: transform;
  }

  .button:hover,
  .filter:hover {
    transform: translateY(-1px);
  }

  .button:active,
  .filter:active {
    transform: translateY(0) scale(0.98);
  }

  .project-card,
  .case-study,
  .summary > div,
  .stack-list > div,
  .cv-card,
  .profile-panel {
    transition:
      opacity var(--duration-base) var(--ease-standard),
      transform var(--duration-base) var(--ease-standard);
  }

  .project-card:hover,
  .case-study:hover,
  .summary > div:hover,
  .stack-list > div:hover,
  .cv-card:hover {
    transform: translateY(-3px);
  }

  .profile-panel:hover {
    transform: translateY(-2px);
  }

  .filter.is-active,
  .filter[aria-pressed="true"] {
    transform: translateY(-1px);
  }

  .project-card.is-filtering {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px) scale(0.985);
  }

  .motion-reveal {
    opacity: 0;
    transform: translateY(16px);
    transition:
      opacity var(--duration-slow) var(--ease-emphasized),
      transform var(--duration-slow) var(--ease-emphasized);
    will-change: opacity, transform;
  }

  .motion-reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
    will-change: auto;
  }

  .hero-copy.motion-reveal {
    transform: translateY(12px);
  }

  .profile-panel.motion-reveal {
    transform: translateY(12px) scale(0.985);
  }

  .profile-panel.motion-reveal.is-visible {
    transform: translateY(0) scale(1);
  }

  .project-card.motion-reveal.is-visible:hover,
  .case-study.motion-reveal.is-visible:hover,
  .summary > div.motion-reveal.is-visible:hover,
  .stack-list > div.motion-reveal.is-visible:hover,
  .cv-card.motion-reveal.is-visible:hover {
    transform: translateY(-3px);
  }

  .profile-panel.motion-reveal.is-visible:hover {
    transform: translateY(-2px) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}

@keyframes page-fade-in {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}