/* Read-view shell: page frame, base reading status, and desktop outline.
   Report content and reveal motion have separate owners. */

@keyframes room-pulse { 50% { opacity: 0.45; } }

.read-view {
  margin: 0 auto;
  max-width: var(--page-max);
  min-height: 100vh;
  padding: clamp(28px, 4vw, 46px) 24px 80px;
}

.stage-reading {
  background: transparent;
  margin: clamp(22px, 4vw, 42px) 0 clamp(34px, 5vw, 64px);
}

body[data-read-mode="walking"] .stage-reading:not(.hidden) {
  position: sticky;
  top: 60px;
  z-index: 34;
}

.stage-reading-card {
  background: var(--surface);
  border: 2px solid var(--border-strong);
  display: grid;
  gap: var(--space-3);
  grid-template-columns: minmax(0, 1fr);
  padding: clamp(24px, 4vw, 38px);
}

.stage-reading-kicker {
  color: var(--muted);
  font-family: var(--brand);
  font-size: var(--fs-slug);
  font-weight: var(--fw-bold);
  letter-spacing: 0.12em;
  margin: 0;
  text-transform: uppercase;
}

.stage-reading-line {
  align-items: flex-start;
  display: flex;
  font-family: var(--serif);
  font-size: clamp(1.75rem, 3vw, var(--fs-h2));
  gap: var(--space-2);
  line-height: 1.16;
  margin: 0;
}

.stage-reading-dot {
  animation: chair-reading 1.4s ease-in-out infinite;
  background: var(--gold);
  flex: 0 0 auto;
  height: 10px;
  margin-top: 0.5em;
  width: 10px;
}

.stage-reading-copy {
  color: var(--body);
  font-family: var(--serif);
  font-size: var(--fs-body);
  line-height: 1.55;
  margin: 0;
  max-width: 56ch;
}

.stage-reading-steps {
  align-self: start;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 0;
  list-style: none;
  margin: 2px 0 0;
  padding: 14px 0 0;
}

.stage-reading-steps li {
  align-items: center;
  display: grid;
  gap: 8px 12px;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  padding: 6px 0 0;
}

.stage-reading-steps span {
  color: var(--faint);
  font-family: var(--brand);
  font-weight: var(--fw-bold);
}

.stage-reading-meta {
  align-items: center;
  color: var(--muted);
  display: flex;
  font-family: var(--brand);
  font-size: var(--fs-slug);
  gap: var(--space-3);
  letter-spacing: 0.06em;
  margin: 0;
}

#read-rail {
  --rail-open: 0;
  display: none;
}

#read-rail:hover,
#read-rail:focus-within {
  --rail-open: 1;
}

.toc-title {
  color: var(--faint);
  font-family: var(--brand);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.13em;
  margin: 0 0 calc(var(--rail-open) * 14px);
  max-height: calc(var(--rail-open) * 2rem);
  opacity: var(--rail-open);
  overflow: hidden;
  text-transform: uppercase;
  transition: opacity var(--dur) var(--ease), max-height 220ms var(--ease), margin 220ms var(--ease);
}

.spine-items,
.spine-more {
  list-style: none;
}

.spine-items {
  margin: 0;
  padding: 0;
}

.spine-items li {
  margin: 0;
}

.spine-item {
  align-items: center;
  color: var(--muted);
  display: grid;
  font-family: var(--serif);
  font-size: 0.98rem;
  gap: 11px;
  grid-template-columns: 9px minmax(0, 1fr);
  line-height: 1.3;
  padding: 6px 0;
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.spine-tick {
  background: var(--surface);
  border: 1px solid var(--faint);
  height: 8px;
  opacity: calc(0.55 + var(--rail-open) * 0.45);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), opacity var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
  width: 8px;
}

.spine-item-label {
  display: block;
  max-width: calc(var(--rail-open) * 300px);
  min-width: 0;
  opacity: var(--rail-open);
  overflow: hidden;
  transform: translateX(calc((var(--rail-open) - 1) * 6px));
  transition: opacity var(--dur) var(--ease), max-width 220ms var(--ease), transform 200ms var(--ease);
  white-space: nowrap;
}

a.spine-item:hover,
a.spine-item:focus-visible,
.spine-item.active {
  color: var(--ink);
}

.spine-item.active .spine-tick {
  background: var(--ink);
  border-color: var(--ink);
  box-shadow: 0 0 0 3px var(--gold-wash);
  opacity: 1;
}

.spine-item.is-verdict {
  color: var(--gold);
  font-weight: 700;
}

.spine-item.is-verdict .spine-tick {
  background: var(--gold);
  border-color: var(--gold);
  opacity: 1;
}

.spine-more {
  margin: 6px 0 0;
  padding: 4px 0 0 2px;
}

.spine-more-ticks {
  display: flex;
  flex-direction: column;
  gap: 7px;
  opacity: calc(0.32 + var(--rail-open) * 0.28);
  transition: opacity var(--dur) var(--ease);
}

.spine-more-ticks > span {
  background: var(--faint);
  border-radius: 50%;
  height: 4px;
  width: 4px;
}

.spine-more-ticks > span:last-child {
  opacity: 0.55;
}

@keyframes chair-reading {
  50% { opacity: 0.45; }
}

@media (max-width: 720px) {
  .stage-reading-card {
    padding: 20px;
  }

  .stage-reading-steps {
    border-left: 0;
    padding-top: 8px;
  }

  .stage-reading-meta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (min-width: 1100px) {
  body[data-view="read"][data-read-mode="full"] #read-rail:not([hidden]) {
    background: color-mix(in srgb, var(--surface) calc(var(--rail-open) * 94%), transparent);
    bottom: 28px;
    box-shadow:
      0 0 0 1px color-mix(in srgb, var(--border) calc(var(--rail-open) * 100%), transparent),
      0 8px 24px -12px rgba(26, 26, 26, calc(var(--rail-open) * 0.22));
    display: flex;
    flex-direction: column;
    justify-content: center;
    left: max(12px, calc((100vw - var(--page-max)) / 2 - 300px));
    overflow-y: auto;
    padding: 0 calc(10px + var(--rail-open) * 8px);
    position: fixed;
    scrollbar-width: none;
    top: 84px;
    transition: width 240ms var(--ease), background 200ms var(--ease), box-shadow 200ms var(--ease), padding 220ms var(--ease);
    width: calc(34px + var(--rail-open) * 256px);
    z-index: 5;
  }

  #read-rail::-webkit-scrollbar {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .stage-reading-dot,
  .stage-reading-steps li.current {
    animation: none;
  }

  .toc-title,
  .spine-item,
  .spine-tick,
  .spine-item-label,
  .spine-more-ticks,
  body[data-view="read"][data-read-mode="full"] #read-rail:not([hidden]) {
    transition: none;
  }

  .spine-item-label {
    transform: none;
  }
}