:root {
  color-scheme: dark;
  --black: #0b0b0c;
  --ink: #f2f2f0;
  --lime: #c6f24e;
  --muted: #a8aa9f;
  --line: rgba(242, 242, 240, 0.16);
  --shadow: rgba(0, 0, 0, 0.55);
  --page-ratio: 0.773;
  --spread-ratio: 1.546;
  --reader-background: var(--black);
  --reader-body-background: radial-gradient(circle at 50% 10%, rgba(198, 242, 78, 0.08), transparent 32rem), var(--black);
  --reader-foreground: var(--ink);
  --reader-accent: var(--lime);
  --reader-muted: var(--muted);
  --reader-line: var(--line);
  --reader-page: #050506;
  --reader-stage-background: radial-gradient(circle at 50% 45%, rgba(198, 242, 78, 0.09), transparent 35%), linear-gradient(145deg, #181A16, #090A09 58%, #14150F);
  --reader-stage-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.62), inset 0 0 5rem rgba(0, 0, 0, 0.45);
  --reader-page-shadow: 0 0.75rem 1.8rem rgba(0, 0, 0, 0.46);
  --reader-control-hover: rgba(198, 242, 78, 0.1);
  --reader-heading-font: "Instrument Serif", Georgia, serif;
  --reader-body-font: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
  --reader-heading-weight: 400;
  --reader-heading-spacing: -0.04em;
  --reader-heading-transform: uppercase;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  background: var(--black);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 50% 10%, rgba(198, 242, 78, 0.08), transparent 32rem),
    var(--black);
  color: var(--ink);
  font-family: "IBM Plex Sans", "Helvetica Neue", Arial, sans-serif;
}

button {
  font: inherit;
}

.raster-reader {
  width: min(100% - 2rem, 76rem);
  margin: 0 auto;
  padding: 2.5rem 0 3rem;
}

.reader-header {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 1rem 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.reader-kicker,
.reader-intro,
.reader-note,
.page-status {
  margin: 0;
  color: var(--muted);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  line-height: 1.5;
  text-transform: uppercase;
}

.reader-header h1 {
  grid-column: 1;
  margin: 0.3rem 0 0;
  font-family: "Instrument Serif", Georgia, serif;
  font-size: clamp(3rem, 8vw, 6.8rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.84;
  text-transform: uppercase;
}

.reader-home {
  grid-column: 2;
  grid-row: 1;
  justify-self: end;
  color: var(--lime);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-decoration: none;
  text-transform: uppercase;
}

.reader-home:hover,
.reader-home:focus-visible {
  color: var(--ink);
  outline: none;
}

.reader-intro {
  grid-column: 2;
  grid-row: 2;
  max-width: 15rem;
  text-align: right;
}

.reader-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.25rem 0;
}

.control-button {
  min-width: 7rem;
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 0.7rem 0.9rem;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.control-button:hover:not(:disabled),
.control-button:focus-visible {
  border-color: var(--lime);
  background: rgba(198, 242, 78, 0.1);
  color: var(--lime);
  outline: none;
}

.control-button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.page-status {
  color: var(--lime);
  white-space: nowrap;
}

.page-stage {
  --stage-pad: 1.25rem;
  --page-gap: 0.18rem;
  position: relative;
  width: min(96vw, 78rem);
  margin: 0 auto;
  aspect-ratio: 1.546;
  padding: var(--stage-pad);
  border: 1px solid rgba(242, 242, 240, 0.12);
  background:
    radial-gradient(circle at 50% 45%, rgba(198, 242, 78, 0.09), transparent 35%),
    linear-gradient(145deg, #181a16, #090a09 58%, #14150f);
  box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.62), inset 0 0 5rem rgba(0, 0, 0, 0.45);
  perspective: 2200px;
}

.page-stage.is-cover {
  width: min(48vw, 38rem);
  aspect-ratio: var(--page-ratio);
}

.page-stage::after {
  position: absolute;
  top: var(--stage-pad);
  bottom: var(--stage-pad);
  left: 50%;
  z-index: 7;
  width: 1px;
  background: rgba(0, 0, 0, 0.62);
  box-shadow: 0 0 1rem rgba(0, 0, 0, 0.74);
  content: "";
  pointer-events: none;
}

.flip-page {
  position: absolute;
  top: var(--stage-pad);
  right: auto;
  bottom: var(--stage-pad);
  left: auto;
  width: calc(50% - var(--stage-pad) - (var(--page-gap) / 2));
  height: auto;
  overflow: hidden;
  border: 0;
  background: #050506;
  box-shadow: 0 0.75rem 1.8rem rgba(0, 0, 0, 0.46);
  opacity: 0;
  pointer-events: none;
}

.flip-page[data-side="left"] {
  left: var(--stage-pad);
}

.flip-page[data-side="right"],
.flip-page.cover-page {
  left: calc(50% + (var(--page-gap) / 2));
}

.page-stage.is-cover .flip-page.cover-page {
  left: var(--stage-pad);
  width: calc(100% - (2 * var(--stage-pad)));
}

.page-stage.is-cover::after {
  display: none;
}

.flip-page img,
.leaf-face img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
}

.flip-page.is-current,
.flip-page.is-reveal {
  opacity: 1;
}

.flip-page.is-current {
  z-index: 3;
  pointer-events: auto;
}

.flip-page.is-reveal {
  z-index: 2;
}

.flip-page.is-reveal {
  pointer-events: none;
}

.flip-page.is-turn-source {
  opacity: 0;
}

.turning-leaf {
  position: absolute;
  top: var(--stage-pad);
  bottom: var(--stage-pad);
  z-index: 9;
  width: calc(50% - var(--stage-pad) - (var(--page-gap) / 2));
  opacity: 0;
  pointer-events: none;
  transform-style: preserve-3d;
  will-change: transform;
}

.turning-leaf--forward {
  left: calc(50% + (var(--page-gap) / 2));
  transform-origin: left center;
}

.turning-leaf--backward {
  left: var(--stage-pad);
  transform-origin: right center;
}

.turning-leaf.is-active {
  opacity: 1;
}

.turning-leaf--forward.is-active {
  animation: turn-page-forward 820ms cubic-bezier(0.3, 0.03, 0.2, 1) both;
}

.turning-leaf--backward.is-active {
  animation: turn-page-backward 820ms cubic-bezier(0.3, 0.03, 0.2, 1) both;
}

.leaf-face {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background: #050506;
  box-shadow: 0 0.8rem 2rem rgba(0, 0, 0, 0.54);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.leaf-face--front {
  transform: rotateY(0deg);
}

.leaf-face--back {
  transform: rotateY(180deg);
}

.leaf-face::after {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 68%, rgba(255, 255, 255, 0.12) 88%, rgba(0, 0, 0, 0.32));
  content: "";
  pointer-events: none;
}

.turning-leaf--backward .leaf-face::after {
  background: linear-gradient(270deg, transparent 68%, rgba(255, 255, 255, 0.12) 88%, rgba(0, 0, 0, 0.32));
}

.page-stage.is-turning::before {
  position: absolute;
  top: var(--stage-pad);
  bottom: var(--stage-pad);
  left: calc(50% - 2.2rem);
  z-index: 8;
  width: 4.4rem;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.7), transparent 70%);
  content: "";
  pointer-events: none;
  animation: gutter-shadow 820ms ease-in-out both;
}

.reader-note {
  padding-top: 1.25rem;
  text-align: center;
}

@keyframes turn-page-forward {
  0% {
    transform: rotateY(0deg) translateZ(1px);
  }
  48% {
    transform: rotateY(-88deg) translateZ(1.4rem);
  }
  100% {
    transform: rotateY(-180deg) translateZ(1px);
  }
}

@keyframes turn-page-backward {
  0% {
    transform: rotateY(0deg) translateZ(1px);
  }
  48% {
    transform: rotateY(88deg) translateZ(1.4rem);
  }
  100% {
    transform: rotateY(180deg) translateZ(1px);
  }
}

@keyframes gutter-shadow {
  0%,
  100% {
    opacity: 0.2;
    transform: scaleX(0.35);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@media (max-width: 640px) {
  .raster-reader {
    width: min(100% - 1rem, 76rem);
    padding-top: 1.25rem;
  }

  .reader-header {
    display: block;
  }

  .reader-header h1 {
    margin-top: 0.7rem;
    max-width: 100%;
    overflow-wrap: anywhere;
    font-size: clamp(2.4rem, 14vw, 5.5rem);
  }

  .reader-intro {
    max-width: none;
    margin-top: 0.9rem;
    text-align: left;
  }

  .page-stage {
    --stage-pad: 0.55rem;
    --page-gap: 0.08rem;
    width: min(92vw, 38rem);
    aspect-ratio: var(--page-ratio);
  }

  .page-stage.is-cover {
    width: min(92vw, 38rem);
    aspect-ratio: var(--page-ratio);
  }

  .page-stage.is-mobile .flip-page,
  .page-stage.is-mobile .flip-page[data-side="left"],
  .page-stage.is-mobile .flip-page[data-side="right"],
  .page-stage.is-mobile .flip-page.cover-page {
    left: var(--stage-pad);
    width: calc(100% - (2 * var(--stage-pad)));
  }

  .page-stage.is-mobile::after,
  .page-stage.is-mobile.is-turning::before {
    display: none;
  }

  .page-stage.is-mobile .turning-leaf {
    left: var(--stage-pad);
    width: calc(100% - (2 * var(--stage-pad)));
  }

  .control-button {
    min-width: 5.5rem;
    padding-inline: 0.55rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .turning-leaf.is-active,
  .page-stage.is-turning::before {
    animation-duration: 1ms;
  }

  .control-button {
    transition: none;
  }
}