@property --hole {
  syntax: "<length>";
  inherits: false;
  initial-value: 0px;
}

html.intro-pending {
  overflow: hidden;
}

html.intro-pending body {
  background: #050806;
}

html.intro-pending body > *:not(.intro) {
  visibility: hidden;
}

.intro {
  --p: 0;
  --cx: 50%;
  --cy: 45%;
  --hole: 0px;
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: #f2fff8;
  background: #050806;
  -webkit-mask: radial-gradient(circle at var(--cx) var(--cy), transparent var(--hole), #000 calc(var(--hole) + 1.5px));
  mask: radial-gradient(circle at var(--cx) var(--cy), transparent var(--hole), #000 calc(var(--hole) + 1.5px));
  transition: --hole 1150ms cubic-bezier(0.83, 0, 0.17, 1);
  cursor: pointer;
  user-select: none;
  -webkit-user-select: none;
}

.intro.is-out {
  --hole: 160vmax;
}

.intro__beams {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 150vmax;
  height: 150vmax;
  margin: -75vmax 0 0 -75vmax;
  background: conic-gradient(
    from 0deg,
    transparent 0deg,
    rgba(54, 255, 159, 0.18) 40deg,
    transparent 95deg,
    transparent 170deg,
    rgba(31, 224, 200, 0.12) 215deg,
    transparent 270deg
  );
  -webkit-mask: radial-gradient(circle closest-side, #000 0%, transparent 62%);
  mask: radial-gradient(circle closest-side, #000 0%, transparent 62%);
  opacity: 0;
  transition: opacity 1200ms var(--ease-out);
  animation: intro-spin 9s linear infinite;
}

.intro__halo {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 64vmin;
  height: 64vmin;
  margin: -32vmin 0 0 -32vmin;
  border-radius: 50%;
  background: radial-gradient(circle closest-side, rgba(54, 255, 159, 0.26), transparent);
  opacity: 0;
  transform: scale(0.6);
  transition: opacity 1400ms var(--ease-out), transform 1800ms var(--ease-out);
}

.intro__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center;
  -webkit-mask: radial-gradient(circle at 50% 45%, #000, transparent 60%);
  mask: radial-gradient(circle at 50% 45%, #000, transparent 60%);
  opacity: 0;
  transition: opacity 1600ms var(--ease-out);
}

.intro__grain {
  position: absolute;
  inset: 0;
  opacity: 0.07;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  pointer-events: none;
}

.intro.is-in .intro__beams,
.intro.is-in .intro__grid {
  opacity: 1;
}

.intro.is-in .intro__halo {
  opacity: 1;
  transform: scale(1);
}

.intro__center {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 34px;
  transition:
    transform 900ms cubic-bezier(0.83, 0, 0.17, 1),
    opacity 500ms var(--ease-out),
    filter 600ms var(--ease-out);
}

.intro.is-out .intro__center {
  transform: scale(1.35);
  opacity: 0;
  filter: blur(16px);
}

.intro__mark {
  position: relative;
  width: 150px;
  height: 150px;
  animation: intro-float 4s ease-in-out infinite;
}

.intro__disc {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background:
    radial-gradient(circle at 32% 26%, rgba(255, 255, 255, 0.22), transparent 42%),
    radial-gradient(circle at 50% 60%, rgba(54, 255, 159, 0.16), rgba(5, 8, 6, 0.4) 72%);
  box-shadow:
    inset 0 1px 1px rgba(255, 255, 255, 0.4),
    inset 0 -8px 24px rgba(54, 255, 159, 0.18),
    inset 0 0 0 1px rgba(255, 255, 255, 0.08),
    0 30px 60px rgba(0, 0, 0, 0.55);
  opacity: 0;
  transform: scale(0.6);
  filter: blur(12px);
  transition:
    opacity 900ms var(--ease-out),
    transform 1200ms var(--ease-spring),
    filter 900ms var(--ease-out);
}

.intro.is-in .intro__disc {
  opacity: 1;
  transform: scale(1);
  filter: blur(0);
}

.intro__logo {
  width: 84%;
  height: auto;
  aspect-ratio: 1;
  object-fit: contain;
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.45));
  transform: translateY(14px) scale(0.85);
  opacity: 0;
  transition:
    opacity 900ms var(--ease-out) 200ms,
    transform 1200ms var(--ease-spring) 200ms;
}

.intro.is-in .intro__logo {
  opacity: 1;
  transform: none;
}

.intro__ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: calc(100% + 36px);
  height: calc(100% + 36px);
  transform: translate(-50%, -50%) rotate(-90deg);
  overflow: visible;
}

.intro__ring circle {
  fill: none;
}

.intro__ring-track {
  stroke: rgba(255, 255, 255, 0.07);
  stroke-width: 1.2;
}

.intro__ring-ticks {
  stroke: rgba(255, 255, 255, 0.14);
  stroke-width: 3;
  stroke-dasharray: 0.25 2.25;
}

.intro__ring-progress {
  stroke: url(#intro-gradient);
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-dasharray: 100;
  stroke-dashoffset: calc(100 - var(--p) * 100);
  filter: drop-shadow(0 0 4px rgba(54, 255, 159, 0.9));
}

.intro__comet {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  margin: -5px 0 0 -5px;
  border-radius: 50%;
  background: #eafff4;
  box-shadow: 0 0 8px 2px #36ff9f, 0 0 24px 6px rgba(54, 255, 159, 0.55);
  transform: rotate(calc(var(--p) * 360deg)) translateY(-89px);
  transform-origin: 50% 50%;
  opacity: 0;
  transition: opacity 400ms var(--ease-out) 300ms;
}

.intro.is-in .intro__comet {
  opacity: 1;
}

.intro.is-done .intro__comet {
  opacity: 0;
  transition-delay: 0ms;
}

.intro__ripple {
  position: absolute;
  inset: -18px;
  border-radius: 50%;
  border: 1.5px solid rgba(54, 255, 159, 0.7);
  opacity: 0;
  pointer-events: none;
}

.intro.is-done .intro__ripple {
  animation: intro-ripple 1200ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.intro.is-done .intro__ripple--2 {
  animation-delay: 180ms;
}

.intro__word {
  display: flex;
  font-size: clamp(2.8rem, 8.5vw, 5.4rem);
  font-weight: 750;
  letter-spacing: -0.05em;
  line-height: 1;
}

.intro__char {
  --c: #f2fff8;
  display: inline-block;
  color: transparent;
  background: linear-gradient(105deg, var(--c) 40%, #ffffff 50%, var(--c) 60%);
  background-size: 300% 100%;
  background-position: 100% 0;
  -webkit-background-clip: text;
  background-clip: text;
  opacity: 0;
  transform: translateY(70%) rotateX(-70deg);
  filter: blur(12px);
  transition:
    opacity 700ms var(--ease-out),
    transform 1000ms var(--ease-spring),
    filter 700ms var(--ease-out);
  transition-delay: calc(420ms + var(--i) * 60ms);
}

.intro__char--accent {
  --c: #36ff9f;
  text-shadow: 0 0 40px rgba(54, 255, 159, 0.35);
}

.intro__word {
  perspective: 600px;
}

.intro.is-in .intro__char {
  opacity: 1;
  transform: none;
  filter: blur(0);
}

.intro.is-done .intro__char {
  animation: intro-shine 1100ms var(--ease-out) forwards;
  animation-delay: calc(var(--i) * 45ms);
}

.intro__tag {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: rgba(242, 255, 248, 0.55);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 900ms var(--ease-out) 1050ms, transform 900ms var(--ease-out) 1050ms;
}

.intro__tag::before,
.intro__tag::after {
  content: "";
  width: 28px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(54, 255, 159, 0.8));
}

.intro__tag::after {
  transform: scaleX(-1);
}

.intro.is-in .intro__tag {
  opacity: 1;
  transform: none;
}

.intro__meta {
  position: absolute;
  right: 32px;
  bottom: 28px;
  left: 32px;
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: rgba(242, 255, 248, 0.45);
  opacity: 0;
  transition: opacity 800ms var(--ease-out) 300ms;
}

.intro.is-in .intro__meta {
  opacity: 1;
}

.intro.is-out .intro__meta {
  opacity: 0;
  transition-delay: 0ms;
}

.intro__count {
  color: #36ff9f;
  font-variant-numeric: tabular-nums;
}

.intro__line {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, #1fe0c8, #36ff9f);
  box-shadow: 0 0 12px rgba(54, 255, 159, 0.7);
  transform: scaleX(var(--p));
  transform-origin: left;
}


@keyframes intro-spin {
  to { transform: rotate(360deg); }
}

@keyframes intro-float {
  50% { transform: translateY(-6px); }
}

@keyframes intro-ripple {
  0% { opacity: 0.9; transform: scale(1); }
  100% { opacity: 0; transform: scale(2.2); }
}

@keyframes intro-shine {
  from { background-position: 100% 0; }
  to { background-position: 0% 0; }
}

@media (max-width: 640px) {
  .intro__mark {
    width: 120px;
    height: 120px;
  }

  .intro__comet {
    transform: rotate(calc(var(--p) * 360deg)) translateY(-75px);
  }

  .intro__meta {
    right: 20px;
    bottom: calc(20px + env(safe-area-inset-bottom));
    left: 20px;
  }
}