:root {
  --bg: #000000;
  --orange: #e8833d;
  --blue: #6e8caa;
  --mark: var(--orange);
  --glow: color-mix(in srgb, var(--mark) 32%, transparent);
  --glow-strong: color-mix(in srgb, var(--mark) 45%, transparent);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--mark);
}

body {
  min-height: 100dvh;
  overflow: hidden;
}

.stage {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 100dvh;
  width: 100%;
  background: var(--bg);
  color: var(--mark);
  cursor: pointer;
}

.stage[data-theme="orange"] {
  --mark: var(--orange);
}

.stage[data-theme="blue"] {
  --mark: var(--blue);
}

.glow {
  position: absolute;
  width: min(15vw, 98px);
  height: min(15vw, 98px);
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 68%);
  filter: blur(22px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.8s ease, transform 1s ease;
}

.stage[data-state="loading"] .glow {
  opacity: 1;
  animation: pulse 1.6s ease-in-out infinite;
}

.stage[data-state="ready"] .glow {
  opacity: 0.28;
  transform: scale(1.85, 0.5);
}

.loader,
.mark {
  grid-area: 1 / 1;
  z-index: 1;
}

.loader {
  width: min(7vw, 45px);
  height: auto;
  overflow: visible;
  opacity: 0;
  pointer-events: none;
  fill: currentColor;
  filter: drop-shadow(0 0 7px var(--glow-strong));
}

.stage[data-state="loading"] .loader {
  opacity: 1;
  animation: spin 1.15s linear infinite;
}

.stage[data-state="ready"] .loader {
  opacity: 0;
  transform: scale(0.55);
  transition: opacity 0.45s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}

.mark {
  width: min(31vw, 266px);
  height: auto;
  overflow: visible;
  opacity: 0;
  fill: currentColor;
}

.stage[data-state="ready"] .mark {
  opacity: 1;
}

.letter {
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
}

.stage[data-state="loading"] .letter {
  opacity: 0;
}

.stage[data-state="ready"] .letter-o {
  animation: fade-in 0.55s ease forwards;
}

.stage[data-state="ready"] .letter-f {
  animation: enter-left 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.12s forwards;
}

.stage[data-state="ready"] .letter-l {
  animation: enter-left 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.22s forwards;
}

.stage[data-state="ready"] .letter-u {
  animation: enter-right 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.22s forwards;
}

.stage[data-state="ready"] .letter-e {
  animation: enter-right 0.7s cubic-bezier(0.22, 1, 0.36, 1) 0.12s forwards;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%,
  100% {
    transform: scale(0.92);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.08);
    opacity: 1;
  }
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes enter-left {
  from {
    opacity: 0;
    transform: translateX(-18px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes enter-right {
  from {
    opacity: 0;
    transform: translateX(18px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (max-width: 600px) {
  .mark {
    width: min(39vw, 266px);
  }

  .loader {
    width: min(10vw, 39px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .glow,
  .loader,
  .stage[data-state="ready"] .letter-f,
  .stage[data-state="ready"] .letter-l,
  .stage[data-state="ready"] .letter-o,
  .stage[data-state="ready"] .letter-u,
  .stage[data-state="ready"] .letter-e {
    animation: none !important;
    transition: none !important;
  }

  .stage[data-state="loading"] .loader,
  .stage[data-state="ready"] .mark,
  .stage[data-state="ready"] .letter {
    opacity: 1;
    transform: none;
  }

  .stage[data-state="ready"] .loader {
    opacity: 0;
  }

  .glow {
    opacity: 0.25;
    transform: none;
  }
}