@import url("./tokens.css");

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

html {
  background: var(--c-bg);
  color-scheme: dark;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100svh;
  overflow: hidden;
  overscroll-behavior: none;
  background: var(--c-bg);
  color: var(--c-fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}

button,
a {
  color: inherit;
  font: inherit;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.experience {
  position: fixed;
  inset: 0;
  isolation: isolate;
  background: var(--c-bg);
}

.frame-canvas,
.poster-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.frame-canvas {
  z-index: 1;
  display: block;
}

.poster-fallback {
  z-index: 0;
  object-fit: cover;
  object-position: 70% center;
}

.image-veil {
  position: absolute;
  z-index: 2;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, var(--c-bg), transparent 58%),
    linear-gradient(0deg, var(--c-veil), transparent 38%);
}

.ambient-glow {
  position: absolute;
  z-index: 2;
  top: -28vmax;
  left: -18vmax;
  width: 62vmax;
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, var(--c-glow), transparent 68%);
  filter: blur(28px);
  opacity: 0.42;
  pointer-events: none;
  animation: ambient-drift var(--dur-ambient) var(--ease-ambient) infinite alternate;
}

@keyframes ambient-drift {
  from { transform: translate3d(0, -8px, 0) scale(0.98); }
  to { transform: translate3d(8px, 8px, 0) scale(1.02); }
}

.site-header,
.interaction-hint,
.frame-meter,
.station-rail {
  position: absolute;
  z-index: 8;
}

.site-header {
  top: var(--pad);
  left: var(--pad);
  right: var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--gap-header);
}

.brand,
.system-state,
.kicker,
.interaction-hint,
.loader-meta,
.loader-count,
.outro-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.brand {
  font-weight: var(--w-heavy);
}

.brand span,
.system-state,
.interaction-hint,
.loader-meta,
.outro-meta {
  color: var(--c-muted);
}

.brand span {
  margin-left: 0.8em;
  font-weight: var(--w-regular);
}

.system-state {
  display: flex;
  align-items: center;
  gap: 0.8em;
}

.sound-control {
  display: flex;
  min-width: 86px;
  min-height: 44px;
  padding: 0;
  align-items: center;
  justify-content: space-between;
  gap: 1em;
  border: 0;
  background: transparent;
  color: var(--c-muted);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  pointer-events: auto;
  cursor: pointer;
  transition: color var(--dur-hover) var(--ease), opacity var(--dur-hover) var(--ease);
}

.sound-control::before {
  width: 6px;
  height: 6px;
  flex: 0 0 auto;
  border-radius: 50%;
  background: var(--c-muted);
  content: "";
  transition: background var(--dur-hover) var(--ease), box-shadow var(--dur-hover) var(--ease);
}

.sound-control:hover,
.sound-control:focus-visible,
.sound-control[aria-pressed="true"] {
  color: var(--c-fg);
}

.sound-control[aria-pressed="true"]::before {
  background: var(--c-accent);
  box-shadow: 0 0 16px var(--c-accent);
}

.sound-control:disabled {
  opacity: 0;
  pointer-events: none;
}

.system-state::before {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-accent);
  content: "";
  box-shadow: 0 0 16px var(--c-accent);
}

.ghost-word {
  position: absolute;
  z-index: 3;
  top: 50%;
  left: var(--pad);
  max-width: calc(100vw - (var(--pad) * 2));
  overflow: hidden;
  color: transparent;
  font-family: var(--font-display);
  font-size: var(--fs-ghost);
  font-weight: var(--w-heavy);
  line-height: 0.78;
  letter-spacing: -0.06em;
  white-space: nowrap;
  -webkit-text-stroke: 1px var(--c-line);
  transform: translateY(-50%);
  opacity: 0.72;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.experience.is-moving .ghost-word {
  opacity: 0.18;
  transform: translateY(-48%);
}

.captions {
  position: absolute;
  z-index: 5;
  inset: 0;
  pointer-events: none;
}

.caption {
  position: absolute;
  top: 50%;
  left: var(--pad);
  width: min(42vw, 650px);
  opacity: 0;
  filter: blur(var(--blur-caption));
  transform: translate3d(0, 32px, 0) translateY(-50%);
  transition: opacity var(--dur-caption) var(--ease), transform var(--dur-caption) var(--ease), filter var(--dur-caption) var(--ease);
}

.caption.is-active {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0) translateY(-50%);
}

.experience.is-moving .caption.is-active {
  opacity: 0;
  filter: blur(var(--blur-caption));
  transform: translate3d(0, -18px, 0) translateY(-50%);
}

.experience.is-moving.is-caption-revealing .caption.is-active {
  opacity: 1;
  filter: blur(0);
  transform: translate3d(0, 0, 0) translateY(-50%);
}

.kicker {
  display: flex;
  align-items: center;
  gap: 1em;
  margin: 0 0 1.5rem;
  color: var(--c-accent);
}

.kicker::after {
  width: clamp(36px, 5vw, 82px);
  height: 1px;
  background: var(--c-accent);
  content: "";
}

.caption h1,
.caption h2,
.outro-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: var(--w-heavy);
  letter-spacing: -0.04em;
}

.caption h1 {
  max-width: 8ch;
  font-size: var(--fs-display);
  line-height: 0.92;
}

.caption h2 {
  max-width: 12ch;
  font-size: var(--fs-title);
  line-height: 1;
}

.caption p {
  max-width: var(--measure-body);
  margin: 1.6rem 0 0;
  color: var(--c-muted);
  font-size: var(--fs-body);
  line-height: 1.75;
}

.interaction-hint {
  bottom: var(--pad);
  left: var(--pad);
  display: flex;
  align-items: center;
  gap: 1em;
}

.interaction-hint::before {
  width: 28px;
  height: 1px;
  background: var(--c-muted);
  content: "";
}

.station-rail {
  top: 50%;
  right: max(8px, calc(var(--pad) / 2));
  display: grid;
  gap: 2px;
  transform: translateY(-50%);
}

.station-dot {
  position: relative;
  display: grid;
  width: 44px;
  height: 44px;
  padding: 0;
  place-items: center;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.station-dot::after {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--c-muted);
  content: "";
  transition: width var(--dur-hover) var(--ease), height var(--dur-hover) var(--ease), background var(--dur-hover) var(--ease), box-shadow var(--dur-hover) var(--ease);
}

.station-dot:hover::after,
.station-dot:focus-visible::after,
.station-dot[aria-current="step"]::after {
  width: 9px;
  height: 9px;
  background: var(--c-accent);
  box-shadow: 0 0 18px var(--c-accent);
}

.frame-meter {
  right: var(--pad);
  bottom: var(--pad);
  left: calc(var(--pad) + 150px);
  height: 1px;
  overflow: hidden;
  background: var(--c-line);
}

.frame-meter span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
}

.loader {
  position: fixed;
  z-index: 20;
  inset: 0;
  display: grid;
  padding: var(--pad);
  background: var(--c-bg);
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.loader.is-leaving {
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
}

.loader-meta {
  display: flex;
  justify-content: space-between;
  align-self: start;
}

.loader-center {
  align-self: center;
}

.loader-title {
  margin: 0;
  color: transparent;
  font-family: var(--font-display);
  font-size: var(--fs-display);
  font-weight: var(--w-heavy);
  line-height: 0.84;
  letter-spacing: -0.05em;
  -webkit-text-stroke: 1px var(--c-line);
}

.loader-count {
  display: block;
  margin-top: 1.5rem;
  color: var(--c-fg);
  font-variant-numeric: tabular-nums;
}

.loader-track {
  height: 1px;
  margin-top: 1.25rem;
  overflow: hidden;
  background: var(--c-line);
}

.loader-track span {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
}

.enter-button,
.replay-button {
  min-height: 44px;
  border: 1px solid var(--c-fg);
  background: transparent;
  color: var(--c-fg);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--dur-hover) var(--ease), color var(--dur-hover) var(--ease), opacity var(--dur) var(--ease);
}

.enter-button {
  width: min(100%, 320px);
  margin-top: 2rem;
  padding: 14px 20px;
  opacity: 0;
  pointer-events: none;
}

.enter-button.is-ready {
  opacity: 1;
  pointer-events: auto;
}

.enter-button:hover,
.enter-button:focus-visible,
.replay-button:hover,
.replay-button:focus-visible {
  background: var(--c-fg);
  color: var(--c-bg);
}

.outro {
  position: absolute;
  z-index: 10;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--pad);
  visibility: hidden;
  background: var(--c-veil);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}

.outro.is-active {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
}

.outro-inner {
  width: min(100%, 1180px);
  text-align: center;
}

.outro-title {
  color: transparent;
  font-size: var(--fs-display);
  line-height: 0.88;
  -webkit-text-stroke: 1px var(--c-fg);
}

.outro-meta {
  margin: 2rem 0;
}

.replay-button {
  padding: 14px 24px;
}

.no-script {
  position: fixed;
  z-index: 50;
  inset: 0;
  display: grid;
  place-items: center;
  padding: var(--pad);
  background: var(--c-bg);
  color: var(--c-fg);
  font-size: var(--fs-body);
  line-height: 1.75;
  text-align: center;
}

.not-found {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--pad);
  overflow: auto;
  background: var(--c-bg);
  color: var(--c-fg);
}

.not-found__panel {
  width: min(100%, 60rem);
}

.not-found__panel .display {
  max-width: 9ch;
  margin: 1.5rem 0;
}

.not-found__link {
  display: inline-grid;
  min-height: 44px;
  margin-top: 2rem;
  padding: 0 1.5rem;
  place-items: center;
  border: 1px solid var(--c-fg);
  color: var(--c-fg);
  font-family: var(--font-mono);
  font-size: var(--fs-label);
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
  transition: background var(--dur-hover) var(--ease), color var(--dur-hover) var(--ease);
}

.not-found__link:hover,
.not-found__link:focus-visible {
  background: var(--c-fg);
  color: var(--c-bg);
}

@media (max-width: 820px) {
  .image-veil {
    background: linear-gradient(0deg, var(--c-bg), transparent 62%);
  }

  .ambient-glow {
    top: auto;
    bottom: -22vmax;
    left: -22vmax;
  }

  .system-state {
    display: none;
  }

  .sound-control {
    min-width: 82px;
  }

  .ghost-word {
    top: 22%;
    opacity: 0.42;
  }

  .caption,
  .caption.is-active {
    top: auto;
    right: calc(var(--pad) + 24px);
    bottom: calc(var(--pad) * 2.6);
    width: auto;
    transform: translate3d(0, 20px, 0);
  }

  .caption.is-active {
    transform: translate3d(0, 0, 0);
  }

  .experience.is-moving .caption.is-active {
    transform: translate3d(0, -14px, 0);
  }

  .caption p {
    margin-top: 1rem;
  }

  .kicker {
    margin-bottom: 1rem;
  }

  .station-rail {
    right: 0;
  }

  .interaction-hint {
    display: none;
  }

  .frame-meter {
    left: var(--pad);
  }

  .loader-title {
    max-width: 7ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}