/* Book demo chrome — works with Anthology template pages */

:root {
  --book-chrome-bg: rgba(28, 27, 25, 0.92);
  --book-chrome-border: rgba(201, 169, 110, 0.22);
  --book-chrome-text: rgba(246, 242, 235, 0.9);
  --book-chrome-muted: rgba(201, 169, 110, 0.55);
  --book-chrome-accent: #c9a96e;
  --book-focus-ring: rgba(201, 169, 110, 0.65);
}

.book-chrome {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10001;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  padding: 10px 14px;
  font-family: var(--sans, "DM Mono", monospace);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--book-chrome-text);
  background: var(--book-chrome-bg);
  border-bottom: 1px solid var(--book-chrome-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.book-chrome__group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.book-chrome__sep {
  width: 1px;
  height: 18px;
  background: var(--book-chrome-border);
  margin: 0 4px;
}

.book-chrome button {
  font: inherit;
  letter-spacing: inherit;
  text-transform: inherit;
  color: var(--book-chrome-text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--book-chrome-border);
  border-radius: 2px;
  padding: 6px 10px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.book-chrome button:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(201, 169, 110, 0.35);
}

.book-chrome button:focus-visible {
  outline: 2px solid var(--book-focus-ring);
  outline-offset: 2px;
}

.book-chrome button[aria-pressed="true"] {
  background: rgba(156, 125, 62, 0.25);
  border-color: rgba(201, 169, 110, 0.45);
}

.book-chrome__progress-wrap {
  flex: 1 1 120px;
  min-width: 80px;
  max-width: 200px;
  height: 3px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 2px;
  overflow: hidden;
}

.book-chrome__progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--book-chrome-accent), rgba(201, 169, 110, 0.65));
  border-radius: 2px;
  transition: width 0.2s ease-out;
}

.book-chrome__label {
  color: var(--book-chrome-muted);
  font-size: 9px;
  white-space: nowrap;
}

.book-toc {
  position: fixed;
  top: 0;
  right: 0;
  width: min(320px, 92vw);
  max-height: 100vh;
  z-index: 10002;
  background: rgba(22, 21, 19, 0.97);
  border-left: 1px solid var(--book-chrome-border);
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.35);
  transform: translateX(100%);
  visibility: hidden;
  transition: transform 0.25s ease, visibility 0.25s;
  padding: 56px 0 24px;
  overflow-y: auto;
}

.book-toc.is-open {
  transform: translateX(0);
  visibility: visible;
}

@media (prefers-reduced-motion: reduce) {
  .book-toc {
    transition: none;
  }
  .book-chrome__progress-bar {
    transition: none;
  }
}

.book-toc__head {
  font-family: var(--serif, Georgia, serif);
  font-size: 14px;
  font-style: italic;
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: none;
  color: var(--book-chrome-text);
  padding: 0 20px 16px;
  border-bottom: 1px solid var(--book-chrome-border);
  margin-bottom: 12px;
}

.book-toc__list {
  list-style: none;
  margin: 0;
  padding: 0 12px;
}

.book-toc__list a {
  display: block;
  padding: 10px 12px;
  color: rgba(246, 242, 235, 0.82);
  text-decoration: none;
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.35;
  border-radius: 4px;
  transition: background 0.12s ease;
}

.book-toc__list a:hover,
.book-toc__list a:focus-visible {
  background: rgba(255, 255, 255, 0.06);
  outline: none;
}

.book-toc__list a:focus-visible {
  box-shadow: 0 0 0 2px var(--book-focus-ring);
}

.book-toc__list a small {
  display: block;
  font-size: 9px;
  color: var(--book-chrome-muted);
  letter-spacing: 0.14em;
  margin-top: 4px;
  text-transform: uppercase;
}

.book-toc__backdrop {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s;
}

.book-toc__backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

body.book-has-chrome {
  padding-top: 52px;
}

/* Invisible left/right hit targets when a section has no spread (single page, front matter, etc.). */
html.book-flip .template-section {
  position: relative;
}

.book-flip-zones {
  position: absolute;
  inset: 0;
  z-index: 30;
  display: flex;
  pointer-events: none;
}

.book-flip-zones__half {
  flex: 1;
  pointer-events: auto;
  border: none;
  margin: 0;
  padding: 0;
  background: transparent;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.book-flip-zones__half:focus-visible {
  outline: 2px solid var(--book-focus-ring, rgba(201, 169, 110, 0.65));
  outline-offset: -4px;
}

/* Spreads: whole left page / whole right page turn (editorial + anthology templates). */
.book-flip--prev,
.book-flip--next {
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.template-section {
  scroll-margin-top: 0;
}

@media (prefers-reduced-motion: no-preference) {
  .template-section.book-reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.55s ease-out, transform 0.55s ease-out;
  }

  .template-section.book-reveal.is-inview {
    opacity: 1;
    transform: translateY(0);
  }
}

.spread[data-layout="stack"] {
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spread[data-layout="stack"] .page.rp::before {
  left: 36px;
  right: auto;
  box-shadow: 1px 0 0 rgba(201, 169, 110, 0.28);
}

/* Flip-book reading: one section per viewport, vertical snap (embed-friendly). */
html.book-flip {
  scroll-snap-type: y mandatory;
  scroll-padding-top: 0;
}

@media (prefers-reduced-motion: reduce) {
  html.book-flip {
    scroll-snap-type: y proximity;
  }
}

html.book-flip .template-section {
  min-height: 100svh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
  padding-top: 28px;
  padding-bottom: 36px;
  box-sizing: border-box;
  justify-content: center;
}

html.book-flip body {
  padding-bottom: 32px;
}