/* Motion and light. Everything here is decorative: it is transform and opacity
   only, runs on the compositor, pauses for reduced motion, and the interface is
   complete without it. */

@view-transition {
  navigation: auto;
}
::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 320ms;
  animation-timing-function: var(--ease-out);
}
::view-transition-old(content) {
  animation: vt-fade-out 180ms var(--ease-in-out) both;
}
::view-transition-new(content) {
  animation: vt-rise-in 420ms var(--ease-out) both;
}
::view-transition-group(nav-indicator),
::view-transition-group(tab-indicator) {
  animation-duration: 420ms;
  animation-timing-function: var(--ease-out);
}
@keyframes vt-fade-out {
  to {
    opacity: 0;
  }
}
@keyframes vt-rise-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
}

/* Aurora: three slow, blurred light fields. */
.aurora {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
}
.aurora i {
  position: absolute;
  width: 60vmax;
  height: 60vmax;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.9;
  will-change: transform;
}
.aurora i:nth-child(1) {
  top: -30vmax;
  left: -10vmax;
  background: radial-gradient(closest-side, var(--aurora-1), transparent 72%);
  animation: drift 22s var(--ease-in-out) infinite alternate;
}
.aurora i:nth-child(2) {
  top: -10vmax;
  right: -25vmax;
  background: radial-gradient(closest-side, var(--aurora-2), transparent 72%);
  animation: drift 28s var(--ease-in-out) -6s infinite alternate-reverse;
}
.aurora i:nth-child(3) {
  bottom: -40vmax;
  left: 20vmax;
  background: radial-gradient(closest-side, var(--aurora-3), transparent 72%);
  animation: drift 34s var(--ease-in-out) -12s infinite alternate;
}
@keyframes drift {
  0% {
    transform: translate3d(0, 0, 0) scale(1);
  }
  50% {
    transform: translate3d(6vmax, 4vmax, 0) scale(1.12);
  }
  100% {
    transform: translate3d(-4vmax, 8vmax, 0) scale(0.94);
  }
}

/* Film grain over dark surfaces. */
.grain::after {
  content: "";
  position: absolute;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  opacity: var(--grain-opacity);
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  animation: grain 1.2s steps(6) infinite;
}
@keyframes grain {
  0% {
    transform: translate(0, 0);
  }
  20% {
    transform: translate(-3%, 2%);
  }
  40% {
    transform: translate(2%, -4%);
  }
  60% {
    transform: translate(-4%, -1%);
  }
  80% {
    transform: translate(3%, 3%);
  }
  100% {
    transform: translate(0, 0);
  }
}

/* Cursor spotlight: effects.js writes --mx / --my on hover. */
.spotlight {
  isolation: isolate;
}
.spotlight::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), var(--spotlight), transparent 45%);
  opacity: 0;
  transition: opacity var(--dur-slow) var(--ease-out);
  pointer-events: none;
}
.spotlight:hover::before {
  opacity: 1;
}

/* Animated gold hairline border. */
@property --angle {
  syntax: "<angle>";
  initial-value: 0deg;
  inherits: false;
}
.hairline {
  position: relative;
}
.hairline::after {
  content: "";
  position: absolute;
  inset: -1px;
  z-index: 0;
  border-radius: inherit;
  padding: 1px;
  background: conic-gradient(from var(--angle), transparent 0 62%, var(--accent-line) 74%, var(--accent) 80%, transparent 88%);
  mask:
    linear-gradient(black 0 0) content-box,
    linear-gradient(black 0 0);
  mask-composite: exclude;
  animation: orbit 6s linear infinite;
  pointer-events: none;
}
@keyframes orbit {
  to {
    --angle: 360deg;
  }
}

/* Scroll reveal: effects.js adds .is-in when an element enters the viewport. */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity var(--dur-reveal) var(--ease-out),
    transform var(--dur-reveal) var(--ease-out);
  transition-delay: calc(var(--i, 0) * 70ms);
}
.reveal.is-in {
  opacity: 1;
  transform: none;
}
.no-js .reveal {
  opacity: 1;
  transform: none;
}

/* Word-by-word headline reveal. */
.split-words .w {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  padding-bottom: 0.08em;
  margin-bottom: -0.08em;
}
.split-words .w > * {
  display: inline-block;
  transform: translateY(105%);
  animation: word-up 1.1s var(--ease-out) forwards;
  animation-delay: calc(120ms + var(--wi, 0) * 75ms);
}
@keyframes word-up {
  to {
    transform: none;
  }
}

.gradient-text {
  background: var(--gradient-text);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: sheen 9s var(--ease-in-out) infinite;
}
@keyframes sheen {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

/* 3D tilt for showcase panels: effects.js writes --rx / --ry. */
.tilt {
  transform: perspective(1400px) rotateX(var(--rx, 0deg)) rotateY(var(--ry, 0deg));
  transform-style: preserve-3d;
  transition: transform 600ms var(--ease-out);
  will-change: transform;
}

.magnetic {
  transition: transform 300ms var(--ease-out);
}

.pulse-dot {
  position: relative;
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}
.pulse-dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--success);
  animation: pulse 2.2s var(--ease-out) infinite;
}
@keyframes pulse {
  to {
    transform: scale(3.2);
    opacity: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .aurora i,
  .grain::after,
  .hairline::after,
  .gradient-text,
  .sidebar::before {
    animation: none !important;
  }
  .reveal,
  .split-words .w > * {
    opacity: 1 !important;
    transform: none !important;
  }
  .tilt {
    transform: none !important;
  }
}