:root {
  --bg: #050505;
  --lyric: rgba(246, 241, 225, 0.18);
  --lyric-bright: rgba(255, 246, 218, 0.34);
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  min-height: 100dvh;
  margin: 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 50% 48%, rgba(255, 229, 176, 0.12), transparent 31rem),
    radial-gradient(circle at 24% 22%, rgba(95, 156, 255, 0.12), transparent 22rem),
    radial-gradient(circle at 78% 76%, rgba(255, 111, 158, 0.1), transparent 24rem),
    var(--bg);
}

.animation-shell {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  width: 100vw;
  height: 100dvh;
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 44px 44px;
}

.animation-shell::after {
  position: absolute;
  inset: 0;
  z-index: 1;
  content: "";
  pointer-events: none;
  background:
    radial-gradient(circle at 50% 50%, transparent 0 35%, rgba(5, 5, 5, 0.2) 52%, rgba(5, 5, 5, 0.74) 100%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.035), transparent 16%, transparent 78%, rgba(255, 255, 255, 0.035));
  mix-blend-mode: normal;
}

.lyric-background {
  position: absolute;
  inset: -16vmax;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  transform: rotate(-8deg);
  opacity: 0;
  transition: opacity 1.2s ease;
  filter: blur(0.15px);
  mask-image: radial-gradient(circle at 50% 50%, rgba(0, 0, 0, 0.98) 0 42%, rgba(0, 0, 0, 0.62) 64%, transparent 91%);
}

.lyric-background.is-ready {
  opacity: 1;
}

.lyric-track {
  position: absolute;
  display: flex;
  gap: clamp(28px, 4vw, 72px);
  width: max-content;
  white-space: nowrap;
  will-change: transform;
  animation: lyric-drift var(--duration, 30s) linear infinite;
}

.lyric-track:nth-child(even) {
  animation-direction: reverse;
}

.lyric-track span {
  color: var(--lyric);
  font-family:
    ui-sans-serif,
    system-ui,
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
  font-size: clamp(34px, 7vw, 108px);
  font-weight: 900;
  letter-spacing: 0;
  line-height: 1;
  text-shadow:
    0 0 18px rgba(255, 230, 190, 0.09),
    0 0 54px rgba(255, 230, 190, 0.08);
}

.lyric-track span:nth-child(3n) {
  color: var(--lyric-bright);
}

.lyric-track span:nth-child(4n) {
  font-style: italic;
}

@keyframes lyric-drift {
  from {
    transform: translate3d(-8%, 0, 0);
  }

  to {
    transform: translate3d(-58%, 0, 0);
  }
}

#pixelCanvas {
  position: relative;
  z-index: 2;
  display: block;
  width: min(92vmin, 900px);
  height: auto;
  aspect-ratio: 1 / 1;
  image-rendering: pixelated;
  filter:
    drop-shadow(0 22px 42px rgba(0, 0, 0, 0.55))
    drop-shadow(0 0 16px rgba(255, 236, 202, 0.08));
}

#sampleCanvas {
  display: none;
}