/* A fixed, decorative layer moves behind the light sections without moving text. */
body { isolation: isolate; }
.hero { position: relative; }
.hero-copy { position: relative; }
.ambient-background {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: -1;
  contain: paint;
}
.ambient-grid {
  --dot-step: 28px;
  position: absolute;
  inset: -64px;
  background-image: radial-gradient(circle, #71828d 1.2px, transparent 1.3px);
  background-size: var(--dot-step) var(--dot-step);
  opacity: .28;
  mask-image: linear-gradient(90deg, #000a, #0006 42%, #000 90%);
}
.ambient-glow {
  position: absolute;
  width: 560px;
  height: 560px;
  top: -80px;
  right: -50px;
  border-radius: 50%;
  background: radial-gradient(circle, #ff654f1c, #ff654f06 50%, transparent 70%);
}
.ambient-glow::after {
  content: '';
  position: absolute;
  inset: 35% 20% -15% -40%;
  border-radius: 50%;
  background: radial-gradient(circle, #748d9d16, transparent 68%);
}
.motion-ready .ambient-glow { animation: ambient-drift 22s ease-in-out infinite alternate; }
.motion-ready .ambient-grid { animation: grid-drift 9s linear infinite; }
body.motion-paused .ambient-background > *, body.page-hidden .ambient-background > * { animation-play-state: paused !important; }
.about-section { background: #e9edefb3; }

.motion-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  padding: 6px 0;
  min-height: 32px;
  border: 0;
  background: transparent;
  color: #626a70;
  font-size: 12px;
  line-height: 1.5;
}
.motion-toggle[hidden] { display: none; }
.motion-toggle:hover { color: var(--ink); }
.motion-toggle-icon { width: 12px; height: 12px; position: relative; }
.motion-toggle-icon::before, .motion-toggle-icon::after {
  content: '';
  position: absolute;
  top: 1px;
  width: 2px;
  height: 10px;
  background: currentColor;
}
.motion-toggle-icon::before { left: 2px; }
.motion-toggle-icon::after { right: 2px; }
.motion-toggle[aria-pressed=true] .motion-toggle-icon::before {
  left: 3px;
  width: 0;
  height: 0;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  border-left: 7px solid currentColor;
  background: transparent;
}
.motion-toggle[aria-pressed=true] .motion-toggle-icon::after { display: none; }

.motion-ready .reveal {
  opacity: 0;
  translate: 0 18px;
  transition: opacity .65s ease, translate .65s cubic-bezier(.22, 1, .36, 1);
  transition-delay: var(--reveal-delay, 0ms);
}
.motion-ready .reveal.is-revealed { opacity: 1; translate: 0 0; }
body.motion-paused .reveal { opacity: 1; translate: none; transition: none; }
body.motion-paused *, body.motion-paused *::before, body.motion-paused *::after { transition: none !important; }
body.motion-paused .button:hover { transform: none; }
html:has(body.motion-paused) { scroll-behavior: auto; }
.motion-ready .model-panel:not([hidden]) { animation: panel-enter .3s ease both; }
body.motion-paused .model-panel { animation: none !important; }
.project-card, .cert-grid article {
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
@media (hover: hover) and (prefers-reduced-motion: no-preference) {
  body:not(.motion-paused) .project-card:hover,
  body:not(.motion-paused) .cert-grid article:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 28px #15191c09;
    border-color: #b5bfc5;
  }
  body:not(.motion-paused) .project-visual:hover { transform: translateY(-3px); }
  .project-visual { transition: transform .3s ease, box-shadow .3s ease; }
}
@keyframes ambient-drift {
  from { transform: translate3d(0, 0, 0) scale(.94); }
  to { transform: translate3d(-90px, 100px, 0) scale(1.1); }
}
@keyframes grid-drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(var(--dot-step), var(--dot-step), 0); }
}
@keyframes panel-enter {
  from { opacity: .5; translate: 0 6px; }
  to { opacity: 1; translate: 0 0; }
}
@media (max-width: 800px) {
  .ambient-grid { --dot-step: 32px; }
  .ambient-glow { width: 400px; height: 400px; top: 0; right: -180px; }
  .motion-toggle { margin-top: 14px; }
  .motion-ready .reveal { translate: 0 12px; transition-duration: .5s; }
  .motion-ready .reveal.is-revealed { translate: 0 0; }
}
@media (prefers-reduced-motion: reduce) {
  .ambient-background > * { animation: none !important; }
  .motion-ready .reveal { opacity: 1; translate: none; transition: none; }
  .motion-toggle { display: none; }
  .model-panel { animation: none !important; }
  .project-card, .cert-grid article, .project-visual { transition: none !important; transform: none !important; }
}
@media print {
  .ambient-background, .motion-toggle { display: none; }
  .motion-ready .reveal { opacity: 1; translate: none; }
}