:root {
  --intro-bg: #060809;
  --intro-text: #f5efe3;
  --intro-muted: rgba(245, 239, 227, .68);
  --intro-line: rgba(245, 239, 227, .14);
  --intro-amber: #f2a23a;
  --intro-ease: cubic-bezier(.18, .82, .18, 1);
}

html.intro-will-play,
html.intro-will-play body,
body.intro-pending {
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 42%, rgba(190, 199, 202, .08), transparent 30%),
    linear-gradient(145deg, #11171a 0%, #080b0d 48%, #050607 100%);
}

.intro-page {
  min-height: 100vh;
  opacity: 1;
  visibility: visible;
}

.intro-transition {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: none;
  place-items: center;
  overflow: hidden;
  pointer-events: auto;
  background:
    radial-gradient(circle at 50% 40%, rgba(198, 207, 210, .1), transparent 28%),
    linear-gradient(90deg, rgba(255,255,255,.035) 0 1px, transparent 1px 11.8%),
    linear-gradient(180deg, rgba(255,255,255,.026) 0 1px, transparent 1px 23%),
    linear-gradient(145deg, #161d20 0%, #0b0f11 46%, #050607 100%);
  isolation: isolate;
  transition: opacity 620ms var(--intro-ease), background 620ms var(--intro-ease);
}

html.intro-will-play .intro-transition,
body.intro-pending .intro-transition {
  display: grid;
}

.intro-transition::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(90deg, rgba(255,255,255,.045) 0 1px, transparent 1px 52px),
    linear-gradient(90deg, rgba(0,0,0,.42), transparent 22%, transparent 78%, rgba(0,0,0,.5)),
    linear-gradient(180deg, rgba(255,255,255,.04), transparent 22%, rgba(0,0,0,.34));
  opacity: .34;
  will-change: opacity;
}

.intro-transition::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 50% 48%, transparent 0 20%, rgba(5, 7, 11, .1) 50%, rgba(5, 7, 11, .7) 100%),
    linear-gradient(180deg, rgba(255,255,255,.035), transparent 30%, rgba(0,0,0,.24));
  transition: opacity 220ms var(--intro-ease);
}

.intro-mark {
  position: relative;
  z-index: 2;
  width: min(23vw, 230px);
  min-width: 118px;
  opacity: 0;
  transform: scale(.94);
  filter: blur(14px);
  transform-origin: center;
  will-change: transform, opacity, filter;
  backface-visibility: hidden;
  contain: paint;
}

.intro-mark img {
  width: 100%;
  height: auto;
  clip-path: inset(50% 50% 50% 50%);
  filter: drop-shadow(0 26px 58px rgba(0, 0, 0, .48)) drop-shadow(0 0 28px rgba(242, 162, 58, .16));
}

.intro-transition.is-playing .intro-mark {
  animation: forgedIntroMark 2660ms cubic-bezier(.18, .76, .12, 1) forwards;
}

.intro-transition.is-playing .intro-mark img {
  animation: forgedIntroLogoLoad 1320ms cubic-bezier(.18, .82, .18, 1) 420ms forwards;
}

.intro-weld-trace {
  position: absolute;
  left: 50%;
  top: calc(50% - min(2vw, 18px));
  z-index: 3;
  width: min(27vw, 270px);
  height: min(10vw, 96px);
  opacity: 0;
  transform: translate(-50%, -50%);
  pointer-events: none;
  background:
    linear-gradient(112deg, transparent 0 42%, rgba(247, 210, 122, .58) 49%, rgba(217, 119, 33, .38) 54%, transparent 62%),
    linear-gradient(180deg, transparent 0 45%, rgba(255,255,255,.1) 50%, transparent 56%);
  background-size: 220% 100%, 100% 100%;
  background-position: 100% 0, 0 0;
  mix-blend-mode: screen;
  filter: blur(.35px) drop-shadow(0 0 12px rgba(247, 210, 122, .36));
  mask-image: radial-gradient(ellipse at center, #000 0 50%, transparent 78%);
  will-change: opacity, background-position, filter, transform;
}

.intro-transition.is-playing .intro-weld-trace {
  animation: forgedIntroTrace 1380ms cubic-bezier(.18, .82, .18, 1) 420ms forwards;
}

.intro-transition.is-exiting {
  opacity: 0;
  transition: opacity 180ms var(--intro-ease);
}

.intro-transition.is-exiting::after {
  opacity: 0;
}

body.intro-shell-reveal .intro-page {
  opacity: 1;
  visibility: visible;
  filter: none;
}

body.intro-shell-reveal .intro-transition {
  opacity: .58;
  background:
    radial-gradient(circle at 50% 40%, rgba(198, 207, 210, .05), transparent 24%),
    linear-gradient(90deg, rgba(255,255,255,.016) 0 1px, transparent 1px 11.8%),
    linear-gradient(145deg, rgba(22, 29, 32, .56) 0%, rgba(11, 15, 17, .42) 46%, rgba(5, 6, 7, .42) 100%);
}

body.intro-content-reveal .intro-transition {
  opacity: .18;
}

body.intro-shell-reveal .intro-transition.is-exiting,
body.intro-content-reveal .intro-transition.is-exiting {
  opacity: 0;
  transition-duration: 160ms;
}

body.intro-shell-reveal .intro-transition::before,
body.intro-shell-reveal .intro-transition::after {
  opacity: 0;
}

@keyframes forgedIntroMark {
  0% {
    opacity: 0;
    transform: scale(.88);
    filter: blur(18px);
  }
  10% {
    opacity: 0;
    transform: scale(.9);
    filter: blur(18px);
  }
  34% {
    opacity: .95;
    transform: scale(.97);
    filter: blur(2px);
  }
  48% {
    opacity: 1;
    transform: scale(1);
    filter: blur(0);
  }
  58% {
    opacity: .98;
    transform: scale(1.08);
    filter: blur(0);
  }
  70% {
    opacity: .72;
    transform: scale(2.6);
    filter: blur(1.5px);
  }
  82% {
    opacity: .2;
    transform: scale(6.2);
    filter: blur(5px);
  }
  92% {
    opacity: 0;
    transform: scale(10);
    filter: blur(8px);
  }
  100% {
    opacity: 0;
    transform: scale(10);
    filter: blur(8px);
  }
}

@keyframes forgedIntroLogoLoad {
  0% {
    clip-path: inset(50% 50% 50% 50%);
    filter: brightness(1.28) saturate(1.12);
  }
  36% {
    clip-path: inset(28% 18% 30% 18%);
    filter: brightness(1.24) saturate(1.12);
  }
  72% {
    clip-path: inset(6% 0 8% 0);
    filter: brightness(1.08) saturate(1.04);
  }
  100% {
    clip-path: inset(0 0 0 0);
    filter: brightness(1) saturate(1);
  }
}

@keyframes forgedIntroTrace {
  0% {
    opacity: 0;
    background-position: 100% 0, 0 0;
    transform: translate(-50%, -50%) scale(.94);
    filter: blur(1px) drop-shadow(0 0 12px rgba(247, 210, 122, .42));
  }
  18% {
    opacity: .36;
  }
  46% {
    opacity: .72;
  }
  74% {
    opacity: .5;
    background-position: 18% 0, 0 0;
    transform: translate(-50%, -50%) scale(1);
  }
  100% {
    opacity: 0;
    background-position: 0 0, 0 0;
    transform: translate(-50%, -50%) scale(1.08);
    filter: blur(7px) drop-shadow(0 0 26px rgba(217, 119, 33, .4));
  }
}

@media (prefers-reduced-motion: reduce) {
  .intro-page,
  .intro-transition.is-exiting {
    transition-duration: 180ms;
  }

  .intro-transition.is-playing .intro-mark {
    animation: forgedIntroReduced 620ms ease-out forwards;
  }

  .intro-transition.is-playing .intro-weld-trace,
  .intro-transition.is-playing .intro-mark img {
    animation-duration: 420ms;
  }

  @keyframes forgedIntroReduced {
    0% {
      opacity: 0;
      transform: scale(.98);
      filter: blur(8px);
    }
    45% {
      opacity: 1;
      transform: scale(1);
      filter: blur(0);
    }
    100% {
      opacity: 0;
      transform: scale(1.04);
      filter: blur(8px);
    }
  }
}