/* reader.css — flipbook-reader met paginabeelden */

:root {
  --paper: #faf6ef;
  --paper-edge: #e8e0cc;
  --ink: #222;
  --reader-bg: #2a2823;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html, body {
  height: 100%;
  width: 100%;
  max-width: 100vw;
  overflow: hidden;
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  background: var(--reader-bg);
  color: #f0e9d9;
  user-select: none;
  -webkit-user-select: none;
}

/* ── Topbar ── */
.reader-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: #1a1814;
  border-bottom: 1px solid #000;
  height: 56px;
  flex-shrink: 0;
}

.reader-bar .home-link {
  color: #f0e9d9;
  text-decoration: none;
  font-weight: 800;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid #555;
  padding: 0.4rem 0.75rem;
  transition: all 0.15s;
}
.reader-bar .home-link:hover { background: #f0e9d9; color: #1a1814; border-color: #f0e9d9; }

.reader-bar .reader-title {
  font-size: 0.95rem;
  font-weight: 700;
  flex: 1;
  text-align: center;
  letter-spacing: 0.02em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.reader-bar .toc-toggle,
.reader-bar .order-link {
  color: #f0e9d9;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid #555;
  padding: 0.4rem 0.75rem;
  background: transparent;
  cursor: pointer;
  transition: all 0.15s;
  font-family: inherit;
}
.reader-bar .toc-toggle:hover,
.reader-bar .order-link:hover { background: #f0e9d9; color: #1a1814; border-color: #f0e9d9; }
.reader-bar .order-link { background: #f0e9d9; color: #1a1814; }
.reader-bar .order-link:hover { background: transparent; color: #f0e9d9; }

/* ── Stage ── */
.reader-stage {
  flex: 1;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  height: calc(100vh - 56px - 56px);
}

.reader-spread {
  display: flex;
  gap: 6px;
  align-items: stretch;
  height: 100%;
  padding: 1.5rem 1rem;
  max-height: 100%;
}

.reader-page {
  background: var(--paper);
  box-shadow: 0 6px 20px rgba(0,0,0,0.35), 0 1px 0 rgba(255,255,255,0.05) inset;
  position: relative;
  overflow: hidden;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.reader-page img {
  max-height: 100%;
  max-width: 100%;
  width: auto;
  height: auto;
  display: block;
  pointer-events: none;
  -webkit-user-drag: none;
}

.reader-page .blank {
  width: 100%;
  height: 100%;
  background: var(--paper);
}

/* Watermerk diagonaal over de pagina */
.reader-page::after {
  content: 'aididactiek.be';
  position: absolute;
  bottom: 8px;
  right: 10px;
  font-size: 9px;
  color: rgba(0,0,0,0.18);
  font-style: italic;
  pointer-events: none;
  letter-spacing: 0.1em;
}

/* ── Nav-knoppen ── */
.nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.2);
  color: #f0e9d9;
  width: 48px;
  height: 80px;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
  z-index: 5;
}
.nav-btn:hover { background: rgba(255,255,255,0.18); }
.nav-btn[disabled] { opacity: 0.25; cursor: not-allowed; }
.nav-btn.prev { left: 0.5rem; }
.nav-btn.next { right: 0.5rem; }

/* ── Bottom bar ── */
.reader-footer {
  height: 56px;
  background: #1a1814;
  border-top: 1px solid #000;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 0 1rem;
  flex-shrink: 0;
}

.page-input {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.9rem;
  color: #f0e9d9;
}
.page-input input {
  width: 64px;
  padding: 0.3rem 0.5rem;
  background: #2a2823;
  border: 1px solid #555;
  color: #f0e9d9;
  text-align: center;
  font-family: inherit;
  font-size: 0.9rem;
}
.page-input .total { color: #aaa; }

.slider-wrap { flex: 1; max-width: 360px; display: flex; align-items: center; gap: 0.5rem; }
.slider-wrap input[type=range] {
  flex: 1;
  appearance: none;
  height: 4px;
  background: #444;
  border-radius: 2px;
  cursor: pointer;
}
.slider-wrap input[type=range]::-webkit-slider-thumb {
  appearance: none;
  width: 16px;
  height: 16px;
  background: #f0e9d9;
  border-radius: 50%;
  cursor: pointer;
}

/* ── TOC drawer ── */
.toc-panel {
  position: fixed;
  top: 56px;
  right: 0;
  width: 320px;
  max-width: 90vw;
  height: calc(100vh - 56px);
  background: #1f1d18;
  border-left: 1px solid #000;
  transform: translateX(100%);
  transition: transform 0.25s ease;
  overflow-y: auto;
  z-index: 100;
  padding: 1rem 1.25rem;
}
.toc-panel.open { transform: translateX(0); box-shadow: -8px 0 24px rgba(0,0,0,0.5); }
.toc-panel h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #aaa;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid #333;
  padding-bottom: 0.5rem;
}
.toc-panel ul { list-style: none; }
.toc-panel li {
  padding: 0.55rem 0;
  border-bottom: 1px solid #2a2823;
  cursor: pointer;
  font-size: 0.92rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color 0.15s;
}
.toc-panel li:hover { color: #fff; }
.toc-panel li .pg { color: #888; font-size: 0.8rem; }
.toc-panel li.active { color: #fff; font-weight: 700; }

/* ── Loading state ── */
.reader-page.loading::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.4) 50%, transparent 100%) 0 0/200% 100%,
    var(--paper-edge);
  animation: shimmer 1.4s linear infinite;
}
@keyframes shimmer {
  0% { background-position: 200% 0, 0 0; }
  100% { background-position: -200% 0, 0 0; }
}

/* ── Mobile / single-page ── */
@media (max-width: 768px) {
  .reader-spread .reader-page.right-only,
  body.single-page .reader-spread .reader-page + .reader-page {
    display: none;
  }
  .reader-stage { width: 100%; max-width: 100vw; }
  .reader-spread {
    width: 100%;
    max-width: 100vw;
    padding: 0.5rem 0.4rem;
    box-sizing: border-box;
    gap: 0;
  }
  .reader-page {
    width: 100%;
    max-width: 100%;
    flex: 1 1 100%;
  }
  .reader-page img {
    width: 100%;
    max-width: 100%;
    height: auto;
    max-height: 100%;
    object-fit: contain;
  }
  .reader-bar {
    padding: 0.5rem 0.6rem;
    gap: 0.4rem;
    width: 100%;
    max-width: 100vw;
    box-sizing: border-box;
  }
  .reader-bar .reader-title { font-size: 0.78rem; min-width: 0; }
  .reader-bar .home-link,
  .reader-bar .toc-toggle,
  .reader-bar .order-link { padding: 0.35rem 0.5rem; font-size: 0.7rem; }
  .nav-btn { width: 32px; height: 56px; font-size: 1.1rem; }
  .nav-btn.prev { left: 0.25rem; }
  .nav-btn.next { right: 0.25rem; }
  .toc-panel { width: 85vw; max-width: 85vw; }
  .reader-footer {
    gap: 0.5rem;
    padding: 0 0.5rem;
    width: 100%;
    max-width: 100vw;
    box-sizing: border-box;
  }
  .slider-wrap { display: none; }
  .page-input input { width: 50px; }
}