:root {
  color-scheme: dark;
  --page-bg: #050403;
  --fade-ms: 520ms;
  --crossfade-ms: 3500ms;
  --active-crossfade-ms: var(--crossfade-ms);
  --chapter-fade-ms: 800ms;
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
}

body {
  overflow: hidden;
  background: var(--page-bg);
  font-family: Georgia, "Times New Roman", serif;
}

.stage {
  position: relative;
  width: 100vw;
  height: 100dvh;
  background: var(--page-bg);
}

.scene {
  position: relative;
  width: 100vw;
  height: 100dvh;
  overflow: hidden;
}

.scene::before,
.scene::after {
  pointer-events: none;
}

.scene img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: var(--scene-fit, contain);
  object-position: center center;
  opacity: 1;
  transform: scale(1);
  transform-origin: var(--transition-origin, center center);
  transition:
    opacity var(--fade-ms) ease,
    transform var(--crossfade-ms) ease-in-out;
  user-select: none;
  -webkit-user-drag: none;
}

.scene img.scene__crossfade-image {
  opacity: 0;
  pointer-events: none;
  transition:
    opacity var(--crossfade-ms) ease-in-out,
    transform var(--crossfade-ms) ease-in-out;
}

.scene.is-crossfading #scene-image {
  opacity: 0;
  transition-duration: var(--active-crossfade-ms);
}

.scene.is-crossfading.has-outgoing-mapZoomIn #scene-image {
  transform: scale(1.08);
}

.scene.is-crossfading.has-outgoing-silverZoomIn #scene-image {
  transform: scale(1.05);
}

.scene.is-crossfading img.scene__crossfade-image {
  opacity: 1;
}

.scene.has-incoming-settleFromSlightZoom img.scene__crossfade-image {
  transform: scale(1.03);
}

.scene.is-crossfading.has-incoming-settleFromSlightZoom img.scene__crossfade-image {
  transform: scale(1);
}

.scene[data-fit="contain"] img {
  object-fit: contain;
}

.scene.is-fading img {
  opacity: 0;
}

.hotspot-layer {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
}

.hotspot {
  position: absolute;
  border: 0;
  outline: 0;
  padding: 0;
  background: transparent;
  color: transparent;
  cursor: pointer;
  pointer-events: auto;
  box-shadow: none;
  -webkit-tap-highlight-color: transparent;
}

.hotspot:hover,
.hotspot:focus,
.hotspot:focus-visible {
  border: 0;
  outline: 0;
  background: transparent;
  box-shadow: none;
}

.music-toggle {
  position: absolute;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 4;
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid rgba(248, 234, 208, 0.38);
  border-radius: 50%;
  background: rgba(5, 4, 3, 0.42);
  color: #f8ead0;
  cursor: pointer;
  font: 700 1.15rem/1 Georgia, "Times New Roman", serif;
  opacity: 0.74;
  text-shadow: 0 0.08rem 0.16rem rgba(0, 0, 0, 0.9);
  transition:
    background 180ms ease,
    border-color 180ms ease,
    color 180ms ease,
    opacity 180ms ease,
    transform 180ms ease;
}

.music-toggle:hover,
.music-toggle:focus-visible {
  border-color: rgba(248, 234, 208, 0.7);
  background: rgba(5, 4, 3, 0.62);
  opacity: 1;
  outline: 0;
  transform: translateY(-1px);
}

.music-toggle[aria-pressed="false"] {
  color: rgba(248, 234, 208, 0.58);
}

.music-toggle[aria-pressed="false"]::after {
  position: absolute;
  width: 1.75rem;
  height: 1px;
  background: currentColor;
  content: "";
  transform: rotate(-42deg);
}

.music-toggle.has-audio-error {
  border-color: rgba(255, 202, 128, 0.8);
  color: #ffd596;
  opacity: 1;
}

.music-start-prompt,
.home-link {
  position: absolute;
  z-index: 4;
  border: 1px solid rgba(248, 234, 208, 0.48);
  border-radius: 999px;
  background: rgba(5, 4, 3, 0.58);
  color: #f8ead0;
  font: 700 0.95rem/1 Georgia, "Times New Roman", serif;
  letter-spacing: 0;
  text-decoration: none;
  text-shadow: 0 0.08rem 0.16rem rgba(0, 0, 0, 0.9);
  transition:
    background 180ms ease,
    border-color 180ms ease,
    opacity 180ms ease,
    transform 180ms ease;
}

.music-start-prompt {
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(4rem, calc(env(safe-area-inset-bottom) + 4rem));
  padding: 0.72rem 1rem;
  cursor: pointer;
}

.home-link {
  left: 50%;
  bottom: max(1.25rem, env(safe-area-inset-bottom));
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.72rem 1.08rem;
  transform: translateX(-50%);
}

.music-start-prompt:hover,
.music-start-prompt:focus-visible,
.home-link:hover,
.home-link:focus-visible {
  border-color: rgba(248, 234, 208, 0.78);
  background: rgba(5, 4, 3, 0.76);
  opacity: 1;
  outline: 0;
}

.home-link:hover,
.home-link:focus-visible {
  transform: translateX(-50%) translateY(-1px);
}

.music-start-prompt:hover,
.music-start-prompt:focus-visible {
  transform: translateY(-1px);
}

.music-start-prompt[hidden],
.home-link[hidden] {
  display: none;
}

.chapter-card {
  position: absolute;
  left: 50%;
  top: 13vh;
  z-index: 2;
  width: min(26rem, calc(100vw - 2rem));
  padding: 0;
  color: #f8ead0;
  filter: blur(0.08rem);
  letter-spacing: 0;
  opacity: 0;
  pointer-events: none;
  text-align: center;
  text-shadow:
    0 0.08rem 0.16rem rgba(0, 0, 0, 0.95),
    0 0 0.75rem rgba(0, 0, 0, 0.62);
  transform: translate(-50%, -0.35rem) scale(0.985);
  transition:
    opacity var(--chapter-fade-ms) cubic-bezier(0.25, 0.1, 0.25, 1),
    transform var(--chapter-fade-ms) cubic-bezier(0.25, 0.1, 0.25, 1),
    filter var(--chapter-fade-ms) cubic-bezier(0.25, 0.1, 0.25, 1);
}

.chapter-card.is-visible {
  filter: blur(0);
  opacity: 1;
  transform: translate(-50%, 0) scale(1);
}

.chapter-card span {
  display: block;
}

.chapter-card__title {
  font-size: clamp(1.45rem, 3.3vw, 2.25rem);
  line-height: 1;
}

.chapter-card__part {
  margin-top: 0.65rem;
  font-size: clamp(1.05rem, 2.3vw, 1.45rem);
  line-height: 1.2;
}

.chapter-card__subtitle {
  margin-top: 0.25rem;
  font-size: clamp(1.15rem, 2.8vw, 1.75rem);
  line-height: 1.2;
}

@media (prefers-reduced-motion: reduce) {
  .scene img {
    transition: none;
  }

  .chapter-card {
    transition: none;
  }

  .music-toggle {
    transition: none;
  }

  .music-start-prompt,
  .home-link {
    transition: none;
  }
}