html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  background: #000;
  overflow: hidden;
}

body {
  font-family: system-ui, sans-serif;
}

.mode-control {
  position: fixed;
  top: max(1rem, env(safe-area-inset-top));
  left: max(1rem, env(safe-area-inset-left));
  z-index: 30;
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.25rem;
  background: rgb(0 0 0 / 0.46);
  border: 1px solid rgb(255 255 255 / 0.22);
  border-radius: 0.5rem;
  backdrop-filter: blur(10px);
}

.mode-control button {
  min-width: 4rem;
  height: 2rem;
  padding: 0 0.8rem;
  border: 0;
  border-radius: 0.35rem;
  background: transparent;
  color: rgb(255 255 255 / 0.72);
  font: 700 0.9rem/1 system-ui, sans-serif;
  letter-spacing: 0;
  cursor: pointer;
}

.mode-control button.is-active {
  background: rgb(255 255 255 / 0.92);
  color: #050505;
}

.mode-control button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

#stage {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  background: #000;
  --kana-bg-a: #050505;
  --kana-bg-b: #101010;
  --kana-bg-c: #000000;
  --kana-fg: #f8f5ed;
  --kana-accent: #f0bf32;
  --kana-glyph-size: clamp(11rem, 42vh, 24rem);
}

#stage::before,
#stage::after {
  position: absolute;
  inset: 0;
  z-index: 5;
  display: grid;
  place-items: center;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

#stage::before {
  content: attr(data-kana);
  background:
    repeating-linear-gradient(
      0deg,
      rgb(255 255 255 / 0.04) 0,
      rgb(255 255 255 / 0.04) 1px,
      transparent 1px,
      transparent 38px
  ),
    linear-gradient(var(--kana-angle, 115deg), var(--kana-bg-a), var(--kana-bg-b) 48%, var(--kana-bg-c));
  color: var(--kana-fg);
  font-size: var(--kana-glyph-size);
  font-weight: 900;
  line-height: 0.9;
  overflow-wrap: anywhere;
  text-align: center;
  text-shadow:
    0 0 2rem var(--kana-accent),
    0 0 5rem var(--kana-accent);
}

#stage::after {
  content: attr(data-romaji);
  align-items: end;
  padding-bottom: max(5vh, 2rem);
  color: var(--kana-accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(1.4rem, 4vh, 2.4rem);
  font-weight: 700;
  letter-spacing: 0;
}

#stage.is-kana-active::before,
#stage.is-kana-active::after {
  opacity: 1;
  visibility: visible;
}

#stage.is-kana-active::before {
  animation: kana-stage-hit 900ms cubic-bezier(0.2, 0.85, 0.2, 1) both;
}

#stage.is-kana-active::after {
  animation: kana-stage-romaji 900ms ease-out both;
}

.movie {
  position: absolute;
  inset: 0;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  background: #000;
  opacity: 0;
  visibility: hidden;
}

.movie.is-active {
  opacity: 1;
  visibility: visible;
}

.kana-visual {
  position: absolute;
  inset: 0;
  z-index: 6;
  display: grid;
  grid-template-rows: 1fr auto 1fr;
  align-items: center;
  justify-items: center;
  overflow: hidden;
  background:
    repeating-linear-gradient(
      0deg,
      rgb(255 255 255 / 0.04) 0,
      rgb(255 255 255 / 0.04) 1px,
      transparent 1px,
      transparent 38px
    ),
    linear-gradient(var(--kana-angle, 115deg), var(--kana-bg-a), var(--kana-bg-b) 48%, var(--kana-bg-c));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.kana-mark-layer {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.kana-mark {
  position: absolute;
  left: 50%;
  top: 50%;
  width: var(--size);
  height: var(--size);
  background: var(--kana-accent);
  box-shadow: 0 0 1.2rem color-mix(in srgb, var(--kana-accent), transparent 35%);
  opacity: 0;
  transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0.4);
  animation: kana-mark-burst 980ms cubic-bezier(0.2, 0.84, 0.22, 1) var(--delay) both;
  will-change: transform, opacity;
}

.kana-mark--circle,
.kana-mark--dot,
.kana-mark--bubble,
.kana-mark--orb {
  border-radius: 50%;
}

.kana-mark--bubble,
.kana-mark--orb {
  background: transparent;
  border: 2px solid var(--kana-accent);
}

.kana-mark--line,
.kana-mark--bar,
.kana-mark--wave {
  width: calc(var(--size) * var(--stretch) * 2.4);
  height: max(0.35rem, calc(var(--size) * 0.22));
  border-radius: 999px;
}

.kana-mark--wave {
  background: transparent;
  border-top: 0.28rem solid var(--kana-accent);
}

.kana-mark--square,
.kana-mark--tile {
  border-radius: 0.22rem;
}

.kana-mark--triangle {
  width: calc(var(--size) * 1.25);
  height: calc(var(--size) * 1.25);
  clip-path: polygon(50% 0, 100% 90%, 0 72%);
}

.kana-mark--diamond {
  border-radius: 0.18rem;
  transform: translate(var(--x), var(--y)) rotate(calc(var(--rot) + 45deg)) scale(0.4);
}

.kana-mark--frame {
  width: calc(var(--size) * var(--stretch) * 2.8);
  height: calc(var(--size) * var(--stretch) * 1.6);
  background: transparent;
  border: 2px solid var(--kana-accent);
  border-radius: 0.55rem;
}

.kana-visual[data-motion="slash"] .kana-mark {
  animation-name: kana-mark-slash;
}

.kana-visual[data-motion="bubble"] .kana-mark {
  animation-name: kana-mark-rise;
}

.kana-visual[data-motion="grid"] .kana-mark,
.kana-visual[data-motion="block"] .kana-mark {
  animation-name: kana-mark-step;
}

.kana-visual[data-motion="spiral"] .kana-mark,
.kana-visual[data-motion="orbit"] .kana-mark {
  animation-name: kana-mark-orbit;
}

.kana-visual[data-motion="bar"] .kana-mark {
  transform-origin: 50% 100%;
  animation-name: kana-mark-bar;
}

.kana-visual[data-motion="wave"] .kana-mark {
  animation-name: kana-mark-wave;
}

.kana-visual[data-motion="shard"] .kana-mark,
.kana-visual[data-motion="spark"] .kana-mark {
  animation-name: kana-mark-spark;
}

.kana-visual[data-motion="tunnel"] .kana-mark {
  animation-name: kana-mark-tunnel;
}

.kana-visual::before,
.kana-visual::after {
  content: "";
  position: absolute;
  width: min(54vh, 34rem);
  height: min(54vh, 34rem);
  border: 2px solid color-mix(in srgb, var(--kana-accent), transparent 65%);
  opacity: 0;
}

.kana-visual::before {
  transform: rotate(18deg) scale(0.65);
}

.kana-visual::after {
  transform: rotate(-28deg) scale(0.88);
}

.kana-visual.is-active {
  opacity: 1;
  visibility: visible;
}

.kana-visual.is-active::before {
  animation: kana-ring-a 1250ms ease-out both;
}

.kana-visual.is-active::after {
  animation: kana-ring-b 1250ms ease-out both;
}

.kana-glyph {
  z-index: 2;
  grid-row: 2;
  color: var(--kana-fg);
  font-size: var(--kana-glyph-size);
  font-weight: 900;
  line-height: 0.9;
  max-width: min(92vw, 56rem);
  overflow-wrap: anywhere;
  text-align: center;
  text-shadow:
    0 0 2rem color-mix(in srgb, var(--kana-accent), transparent 25%),
    0 0 5rem color-mix(in srgb, var(--kana-accent), transparent 55%);
  transform: translateY(-2vh);
}

.kana-glyph.glyph-1 {
  font-stretch: condensed;
}

.kana-glyph.glyph-2 {
  transform: translateY(-3vh) rotate(-3deg);
}

.kana-glyph.glyph-3 {
  transform: translateY(-1vh) rotate(4deg);
}

.kana-glyph.glyph-4 {
  filter: blur(0.02em);
}

.kana-glyph.glyph-5 {
  transform: translateY(-2vh) skewX(-6deg);
}

.kana-glyph.glyph-6 {
  transform: translateY(-2vh) skewY(3deg);
}

.kana-glyph.glyph-7 {
  text-shadow:
    0.08em 0 0 color-mix(in srgb, var(--kana-accent), transparent 20%),
    0 0 3rem var(--kana-accent);
}

.kana-glyph.glyph-8 {
  transform: translateY(-2vh) scaleX(0.88);
}

.kana-romaji {
  z-index: 2;
  grid-row: 2;
  align-self: end;
  margin-bottom: max(5vh, 2rem);
  color: var(--kana-accent);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: clamp(1.4rem, 4vh, 2.4rem);
  font-weight: 700;
  letter-spacing: 0;
}

.kana-visual.is-active .kana-glyph {
  animation: kana-glyph-hit 1250ms cubic-bezier(0.2, 0.85, 0.2, 1) both;
}

.kana-visual.is-active .kana-romaji {
  animation: kana-romaji-hit 1250ms ease-out both;
}

@keyframes kana-layer {
  0% {
    opacity: 0;
  }
  8%,
  82% {
    opacity: 1;
  }
  100% {
    opacity: 1;
  }
}

@keyframes kana-glyph-hit {
  0% {
    opacity: 0;
    transform: translateY(-2vh) scale(0.72) rotate(-5deg);
  }
  16% {
    opacity: 1;
    transform: translateY(-2vh) scale(1.08) rotate(2deg);
  }
  58% {
    opacity: 1;
    transform: translateY(-2vh) scale(0.98) rotate(-1deg);
  }
  100% {
    opacity: 1;
    transform: translateY(-2vh) scale(1) rotate(0deg);
  }
}

@keyframes kana-romaji-hit {
  0% {
    opacity: 0;
    transform: translateY(1rem);
  }
  18%,
  76% {
    opacity: 1;
    transform: translateY(0);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kana-ring-a {
  0% {
    opacity: 0;
    transform: rotate(18deg) scale(0.5);
  }
  20% {
    opacity: 0.48;
  }
  100% {
    opacity: 0;
    transform: rotate(64deg) scale(1.15);
  }
}

@keyframes kana-ring-b {
  0% {
    opacity: 0;
    transform: rotate(-28deg) scale(0.62);
  }
  24% {
    opacity: 0.34;
  }
  100% {
    opacity: 0;
    transform: rotate(-78deg) scale(1.32);
  }
}

@keyframes kana-stage-hit {
  0% {
    opacity: 0;
    transform: scale(0.72) rotate(-5deg);
  }
  18% {
    opacity: 1;
    transform: scale(1.05) rotate(2deg);
  }
  100% {
    opacity: 1;
    transform: scale(1) rotate(0deg);
  }
}

@keyframes kana-stage-romaji {
  0% {
    opacity: 0;
    transform: translateY(1rem);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes kana-mark-burst {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0.2);
  }
  26% {
    opacity: 0.86;
  }
  100% {
    opacity: 0.34;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(calc(var(--rot) + 80deg)) scale(1);
  }
}

@keyframes kana-mark-slash {
  0% {
    opacity: 0;
    transform: translate(calc(var(--x) - var(--tx)), calc(var(--y) - var(--ty))) rotate(var(--rot)) scaleX(0.2);
  }
  24% {
    opacity: 0.92;
  }
  100% {
    opacity: 0.34;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(var(--rot)) scaleX(1);
  }
}

@keyframes kana-mark-rise {
  0% {
    opacity: 0;
    transform: translate(var(--x), calc(var(--y) + 12vh)) rotate(var(--rot)) scale(0.2);
  }
  30% {
    opacity: 0.74;
  }
  100% {
    opacity: 0.30;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(var(--rot)) scale(1.2);
  }
}

@keyframes kana-mark-step {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0);
  }
  18% {
    opacity: 0.88;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(1.1);
  }
  100% {
    opacity: 0.36;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(calc(var(--rot) + 20deg)) scale(0.92);
  }
}

@keyframes kana-mark-orbit {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0.3);
  }
  22% {
    opacity: 0.88;
  }
  100% {
    opacity: 0.32;
    transform: translate(calc(var(--x) + var(--ty)), calc(var(--y) - var(--tx))) rotate(calc(var(--rot) + 220deg)) scale(1.05);
  }
}

@keyframes kana-mark-bar {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scaleY(0.05);
  }
  32% {
    opacity: 0.9;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scaleY(1);
  }
  100% {
    opacity: 0.34;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(var(--rot)) scaleY(0.72);
  }
}

@keyframes kana-mark-wave {
  0% {
    opacity: 0;
    transform: translate(calc(var(--x) - 8vw), var(--y)) rotate(var(--rot)) scaleX(0.2);
  }
  24% {
    opacity: 0.82;
  }
  100% {
    opacity: 0.34;
    transform: translate(calc(var(--x) + var(--tx) + 8vw), calc(var(--y) + var(--ty))) rotate(calc(var(--rot) + 10deg)) scaleX(1);
  }
}

@keyframes kana-mark-spark {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0);
  }
  18% {
    opacity: 1;
    transform: translate(var(--x), var(--y)) rotate(calc(var(--rot) + 35deg)) scale(1.25);
  }
  100% {
    opacity: 0.22;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(calc(var(--rot) + 160deg)) scale(0.2);
  }
}

@keyframes kana-mark-tunnel {
  0% {
    opacity: 0;
    transform: translate(var(--x), var(--y)) rotate(var(--rot)) scale(0.18);
  }
  28% {
    opacity: 0.74;
  }
  100% {
    opacity: 0.30;
    transform: translate(calc(var(--x) + var(--tx)), calc(var(--y) + var(--ty))) rotate(calc(var(--rot) + 55deg)) scale(2.4);
  }
}