.reader-page {
  --reader-paper: #f1dfbd;
  --reader-cyan: #75d1d1;
}

.cosmos-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  opacity: 0.74;
  pointer-events: none;
}

.reader-page::before {
  z-index: -2;
  background:
    linear-gradient(180deg, rgba(5, 5, 4, 0.72), rgba(5, 5, 4, 0.92)),
    radial-gradient(ellipse at 72% 12%, rgba(214, 168, 79, 0.14), transparent 34rem);
}

.reader-hero {
  position: relative;
  min-height: calc(100svh - 77px);
  display: grid;
  align-items: end;
  overflow: hidden;
  padding: clamp(var(--space-10), 7vw, var(--space-24)) clamp(var(--space-4), 4vw, var(--space-10));
  background: url("./assets/observatory.png") center / cover no-repeat;
}

.reader-hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(5, 5, 4, 0.96), rgba(5, 5, 4, 0.58) 58%, rgba(5, 5, 4, 0.24)),
    linear-gradient(0deg, rgba(5, 5, 4, 0.94), rgba(5, 5, 4, 0.08) 66%);
}

.reader-hero-copy {
  position: relative;
  z-index: 1;
  width: min(100%, 980px);
  display: grid;
  gap: var(--space-6);
}

.reader-hero h1 {
  max-width: 11ch;
  font-size: clamp(3.2rem, 8.4vw, 9rem);
}

.reader-hero-copy p:not(.eyebrow) {
  color: var(--color-text);
  font-size: var(--text-lg);
}

.reader-intro {
  border-block: 1px solid var(--color-divider);
  background: color-mix(in oklab, var(--color-surface) 58%, transparent);
}

.reader-intro-grid {
  width: min(100%, var(--content-wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1fr);
  gap: clamp(var(--space-8), 6vw, var(--space-20));
  align-items: center;
}

.reader-intro-grid p:last-child {
  color: var(--color-text-muted);
  font-size: var(--text-lg);
}

.reader-shell {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 820px);
  justify-content: center;
  gap: clamp(var(--space-6), 5vw, var(--space-16));
  align-items: start;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(117, 209, 209, 0.1), transparent 30rem),
    color-mix(in oklab, var(--color-surface) 34%, transparent);
}

.reader-tools {
  position: sticky;
  top: 104px;
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface) 86%, transparent);
  box-shadow: var(--shadow-md);
}

.progress-track {
  height: 0.5rem;
  overflow: hidden;
  border-radius: var(--radius-full);
  background: rgba(228, 215, 192, 0.12);
}

.progress-track span {
  display: block;
  width: 20%;
  height: 100%;
  background: var(--gold-gradient);
  transition: width var(--transition-interactive);
}

.reader-progress,
.reader-choice-summary {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.reader-choice-summary {
  min-height: 4.8rem;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-divider);
}

.reader-reset {
  min-height: 46px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  background: color-mix(in oklab, var(--color-surface-2) 86%, transparent);
  color: var(--color-text);
}

.story-card {
  min-width: 0;
  padding: clamp(var(--space-6), 5vw, var(--space-16));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, rgba(214, 168, 79, 0.1), transparent 34%),
    color-mix(in oklab, var(--color-surface) 86%, transparent);
  box-shadow: var(--shadow-lg);
}

.story-card h2 {
  max-width: 12ch;
  margin-top: var(--space-3);
  margin-bottom: var(--space-8);
  font-size: clamp(2.5rem, 5vw, 5.8rem);
}

.story-prose {
  display: grid;
  gap: var(--space-5);
  color: var(--reader-paper);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.16rem, 0.9rem + 0.8vw, 1.46rem);
  line-height: 1.78;
}

.story-prose p {
  max-width: 68ch;
}

.chapter-figure {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.chapter-figure img {
  width: 100%;
  aspect-ratio: 2.1 / 1;
  object-fit: cover;
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius-xl) - var(--space-2));
  box-shadow: var(--shadow-md);
}

.chapter-figure figcaption {
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.story-prose .story-note {
  padding: var(--space-5);
  border-left: 2px solid var(--color-primary);
  background: rgba(214, 168, 79, 0.08);
  color: var(--color-text-muted);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.inline-choice {
  display: grid;
  gap: var(--space-3);
  margin: var(--space-2) 0;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(5, 5, 4, 0.42);
}

.inline-choice p {
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
}

.inline-choice .choice-hint {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.choice-buttons {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
}

.choice-buttons button {
  min-height: 48px;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: color-mix(in oklab, var(--color-surface-2) 86%, transparent);
  color: var(--color-text);
  text-align: left;
}

.choice-buttons button[aria-pressed="true"] {
  border-color: color-mix(in oklab, var(--color-primary) 70%, var(--color-border));
  background: color-mix(in oklab, var(--color-primary) 18%, var(--color-surface-2));
}

.chapter-actions {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.chapter-index {
  background: color-mix(in oklab, var(--color-surface) 46%, transparent);
}

.chapter-list {
  width: min(100%, var(--content-wide));
  margin-inline: auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: var(--space-3);
}

.story-break {
  width: 4rem;
  height: 1px;
  margin: var(--space-3) 0;
  background: var(--gold-gradient);
}

.chapter-card {
  min-height: 172px;
  display: grid;
  gap: var(--space-3);
  align-content: start;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: color-mix(in oklab, var(--color-surface) 82%, transparent);
  color: var(--color-text);
  text-align: left;
}

.chapter-card strong {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  line-height: 1.05;
}

.chapter-card span,
.chapter-card small {
  color: var(--color-text-muted);
  font-size: var(--text-xs);
}

.chapter-card.active {
  border-color: color-mix(in oklab, var(--color-primary) 68%, var(--color-border));
  box-shadow: 0 0 34px rgba(214, 168, 79, 0.12);
}

@media (max-width: 1120px) {
  .chapter-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 860px) {
  .reader-intro-grid,
  .reader-shell {
    grid-template-columns: 1fr;
  }

  .reader-tools {
    position: static;
  }

  .reader-hero h1,
  .story-card h2 {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  .reader-hero h1 {
    font-size: clamp(3rem, 15vw, 4.8rem);
  }

  .choice-buttons,
  .chapter-list,
  .chapter-actions {
    grid-template-columns: 1fr;
  }

  .chapter-actions {
    display: grid;
  }
}