/* Series pages extend the shared md2HTML reader without changing book pages. */

.series-cover {
  width: min(100%, 1040px);
  min-height: calc(100vh - 60px);
  margin: 0 auto;
  padding: 0 var(--gutter) var(--space-10);
}

.series-hero {
  padding: var(--space-9) 0 var(--space-8);
  border-bottom: 1px solid var(--line);
}

.series-eyebrow,
.series-stats,
.series-part-label,
.series-part-count,
.series-chapter-meta,
.series-breadcrumb,
.series-sidebar-home {
  font-family: var(--mono);
  letter-spacing: 0;
  text-transform: uppercase;
}

.series-eyebrow {
  color: var(--muted);
  font-size: var(--text-xs);
}

.series-hero h1 {
  max-width: 760px;
  margin: var(--space-3) 0 var(--space-4);
  color: var(--ink);
  font-size: var(--text-4xl);
  font-weight: var(--weight-semibold);
  line-height: 1.08;
  letter-spacing: 0;
}

.series-hero > p {
  max-width: 680px;
  margin: 0;
  color: var(--ink-soft);
  font-size: var(--text-lg);
  line-height: 1.6;
}

.series-stats {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
  color: var(--muted);
  font-size: var(--text-xs);
}

.series-part {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 76px;
}

.series-part-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: start;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.series-part-label {
  padding: 5px 10px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--bg);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.series-part-head h2 {
  margin: 0 0 var(--space-1);
  color: var(--ink);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  line-height: 1.25;
  letter-spacing: 0;
}

.series-part-head p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  font-size: var(--text-sm);
  line-height: 1.5;
}

.series-part-count {
  padding-top: 5px;
  color: var(--muted);
  font-size: var(--text-xs);
  white-space: nowrap;
}

.series-chapter-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 164px;
  gap: var(--space-3);
  margin: 0;
  padding: 0;
  list-style: none;
}

.series-chapter-grid > li {
  min-width: 0;
  height: 164px;
  margin-bottom: 0;
  padding-left: 0;
  counter-increment: none;
}

.series-chapter-grid > li::before {
  display: none;
  content: none;
}

.series-chapter-card.toc-card {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  grid-template-rows: 1fr;
  align-items: start;
  gap: var(--space-3);
  width: 100%;
  height: 100%;
  min-height: 0;
  padding: var(--space-4);
  overflow: hidden;
  border: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.series-chapter-card.toc-card:hover {
  border-color: var(--line-2);
  background: var(--bg-soft);
}

.series-chapter-number {
  padding-top: 2px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--text-xs);
  letter-spacing: 0;
}

.series-chapter-copy {
  display: block;
  min-width: 0;
}

.series-chapter-meta {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--muted);
  font-size: 10px;
}

.series-chapter-card.toc-card h3 {
  display: -webkit-box;
  margin: 0 0 var(--space-2);
  overflow: hidden;
  color: var(--ink);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  line-height: 1.3;
  letter-spacing: 0;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.series-chapter-card.toc-card p {
  display: -webkit-box;
  margin: 0;
  overflow: hidden;
  color: var(--ink-soft);
  font-size: var(--text-xs);
  line-height: 1.5;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
}

.series-chapter-arrow {
  color: var(--muted);
  font-size: var(--text-sm);
  transition: color 0.18s ease, transform 0.18s ease;
}

.series-chapter-card:hover .series-chapter-arrow {
  color: var(--ink);
  transform: translateX(2px);
}

.series-reader.with-sidebar {
  grid-template-columns: 300px minmax(0, 1fr);
}

.series-reader .chapter-body {
  max-width: 800px;
}

.series-sidebar {
  padding-right: var(--space-5);
  padding-left: var(--space-5);
}

.mtoc-content.series-sidebar {
  padding: 0;
}

.series-sidebar-home {
  display: block;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 10px;
  text-decoration: none;
}

.series-sidebar-part {
  margin-bottom: var(--space-5);
}

/* Master-detail: the docked sidebar shows only the active part; the
   top PART tabs switch between them. The mobile drawer (.mtoc-content)
   is left untouched so it still holds the full series map. */
.series-reader .series-sidebar .series-sidebar-part {
  display: none;
}

.series-reader .series-sidebar .series-sidebar-part.active {
  display: block;
  margin-bottom: 0;
}

.series-sidebar h4 {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: var(--space-2);
  margin: 0 0 var(--space-2);
  padding: 0 0 var(--space-2);
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--sans);
  font-size: var(--text-xs);
  line-height: 1.4;
  letter-spacing: 0;
  text-transform: none;
}

.series-sidebar h4 span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.series-sidebar .series-chapter-item {
  counter-increment: none;
}

.series-sidebar .series-chapter-item > a {
  grid-template-columns: 28px minmax(0, 1fr);
  gap: var(--space-1);
  padding: 5px 6px;
  border-left: 2px solid transparent;
  font-size: 12px;
  line-height: 1.35;
}

/* With only one part on screen, the docked list can breathe. */
.series-reader .series-sidebar .series-sidebar-part h4 {
  font-size: var(--text-sm);
}

.series-reader .series-sidebar .series-chapter-item > a {
  padding: 7px 8px;
  font-size: 14px;
  line-height: 1.4;
}

.series-reader .series-sidebar .series-section-links a {
  font-size: 13px;
}

.series-sidebar .series-chapter-item > a::before {
  content: attr(data-chapter);
  padding-top: 1px;
}

.series-sidebar .series-chapter-item > a.active {
  border-left-color: var(--ink);
  background: var(--bg-soft);
}

.series-sidebar .series-section-links {
  margin: var(--space-1) 0 var(--space-2) 36px;
  padding-left: var(--space-2);
  border-left: 1px solid var(--line);
}

.series-sidebar .series-section-links li {
  counter-increment: none;
}

.series-sidebar .series-section-links a {
  display: block;
  padding: 3px 0;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.35;
}

.series-sidebar .series-section-links a::before {
  display: none;
  content: none;
}

.series-breadcrumb {
  margin-bottom: var(--space-3);
  color: var(--muted);
  font-size: 10px;
}

.series-pager a.cross-part {
  padding-top: var(--space-3);
  border-top: 1px dashed var(--line-2);
}

.series-pager a.cross-part .label {
  color: var(--ink);
}

@media (max-width: 900px) {
  .series-reader.with-sidebar {
    grid-template-columns: 260px minmax(0, 1fr);
  }

  .series-reader .chapter-body {
    padding-right: var(--space-6);
    padding-left: var(--space-6);
  }
}

@media (max-width: 768px) {
  .series-hero {
    padding: var(--space-7) 0 var(--space-6);
  }

  .series-hero h1 {
    font-size: var(--text-3xl);
  }

  .series-part {
    padding: var(--space-7) 0;
  }

  .series-part-head {
    grid-template-columns: 1fr auto;
  }

  .series-part-head > div {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .series-chapter-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 154px;
  }

  .series-chapter-grid > li {
    height: 154px;
  }

  .series-reader.with-sidebar {
    grid-template-columns: 1fr;
  }

  .series-reader .chapter-body {
    padding-right: var(--gutter);
    padding-left: var(--gutter);
  }
}