/* Overview slideshow for the genealogy essays */

body.deck-page {
  margin: 0;
  min-height: 100dvh;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.deck-skip {
  position: absolute;
  left: -999px;
  top: 0;
  z-index: 80;
  padding: 0.5rem 0.8rem;
  background: var(--panel);
  color: var(--ink);
}
.deck-skip:focus {
  left: 12px;
  top: 12px;
}

.deck-chrome {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.6rem 1.2rem;
  align-items: center;
  padding: 0.7rem clamp(12px, 3vw, 28px) 0.55rem;
  border-bottom: 1px solid var(--line);
  background: var(--ground);
}

.deck-chrome .site-bar {
  margin: 0;
  padding: 0;
  border: 0;
}

.deck-meta {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  white-space: nowrap;
}

.deck-progress {
  display: block;
  width: min(11rem, 28vw);
  height: 3px;
  appearance: none;
  border: 0;
  background: var(--line);
}
.deck-progress::-webkit-progress-bar { background: var(--line); }
.deck-progress::-webkit-progress-value { background: var(--cyan); }
.deck-progress::-moz-progress-bar { background: var(--cyan); }

.deck-count { font-variant-numeric: tabular-nums; }

.deck-outline-toggle {
  font: inherit;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.35rem 0.7rem;
  cursor: pointer;
}
.deck-outline-toggle:hover,
.deck-outline-toggle[aria-expanded="true"] {
  border-color: var(--cyan);
  color: var(--cyan);
}

.deck {
  position: relative;
  min-height: calc(100dvh - 7.4rem);
}

.slide {
  display: none;
  min-height: calc(100dvh - 7.4rem);
  padding: clamp(1.4rem, 4vh, 3.2rem) clamp(16px, 5vw, 56px) 5.5rem;
}
.slide.is-current {
  display: grid;
  align-content: center;
}
.slide-inner {
  width: min(920px, 100%);
  margin: 0 auto;
}
.slide-inner.wide { width: min(1080px, 100%); }

.slide .kicker {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.85rem;
}
.slide h2 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.7rem, 4.2vw, 2.55rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 0.9rem;
  text-wrap: balance;
}
.slide h2 em { font-style: italic; color: var(--muted); }
.slide .lead {
  max-width: 62ch;
  font-size: clamp(1.02rem, 1.7vw, 1.18rem);
  line-height: 1.55;
  color: var(--muted);
  margin: 0 0 1.4rem;
}
.slide .lead strong { color: var(--ink); font-weight: 600; }

.slide-source {
  margin: 1.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
}
.slide-source a { color: var(--cyan); }

.branch-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.55rem;
  margin: 1.4rem 0 0;
}
.branch-row span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--violet);
  background: var(--violet-soft);
  border-radius: 999px;
  padding: 0.28em 0.7em;
}

.q-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem 2.4rem;
  margin: 0.4rem 0 0;
}
.q-grid article { min-width: 0; }
.q-grid .n {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  display: block;
  margin-bottom: 0.35rem;
}
.q-grid h3 {
  font-family: var(--serif);
  font-size: 1.22rem;
  font-weight: 600;
  margin: 0 0 0.4rem;
}
.q-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 42ch;
}

.term-list {
  display: grid;
  gap: 0.95rem;
  margin: 0.2rem 0 0;
  padding: 0;
}
.term-list > div {
  display: grid;
  grid-template-columns: minmax(8rem, 14rem) minmax(0, 1fr);
  gap: 0.4rem 1.2rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--line);
}
.term-list dt {
  font-family: var(--serif);
  font-size: 1.12rem;
  font-weight: 600;
}
.term-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.5;
}

.tiers {
  display: grid;
  gap: 0;
  margin: 0.6rem 0 0;
  border-top: 1px solid var(--line);
}
.tiers > div {
  display: grid;
  grid-template-columns: minmax(8rem, 13rem) minmax(0, 1fr);
  gap: 0.35rem 1.4rem;
  padding: 0.95rem 0;
  border-bottom: 1px solid var(--line);
}
.tiers .tier-label {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
  padding-top: 0.2rem;
}
.tiers p { margin: 0; color: var(--muted); max-width: 58ch; }
.tiers strong { color: var(--ink); }

.fork {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.6rem 2.6rem;
  margin: 0.5rem 0 0;
}
.fork h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  margin: 0 0 0.4rem;
}
.fork p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.5;
}

.trail {
  list-style: none;
  margin: 0.4rem 0 0;
  padding: 0;
  counter-reset: step;
}
.trail li {
  position: relative;
  padding: 0.7rem 0 0.7rem 2.4rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.5;
}
.trail li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 0.78rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}
.trail strong { color: var(--ink); }

.goto {
  list-style: none;
  margin: 0.3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}
.goto li {
  display: grid;
  grid-template-columns: minmax(9rem, 16rem) minmax(0, 1fr);
  gap: 0.4rem 1.2rem;
  align-items: baseline;
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
}
.goto a {
  font-family: var(--serif);
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--ink);
  border-bottom: none;
}
.goto a:hover { color: var(--cyan); }
.goto span { color: var(--muted); font-size: 0.92rem; }

.hint {
  margin: 1.2rem 0 0;
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--faint);
}

.deck-controls {
  position: fixed;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(16px, env(safe-area-inset-bottom));
  z-index: 30;
  display: flex;
  gap: 0.4rem;
}
.deck-controls button {
  font-family: var(--sans);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.95rem;
  cursor: pointer;
}
.deck-controls button:hover:not(:disabled) { border-color: var(--cyan); }
.deck-controls button:disabled { opacity: 0.35; cursor: not-allowed; }

.deck-outline {
  position: fixed;
  z-index: 40;
  top: 0;
  right: 0;
  width: min(22rem, 92vw);
  height: 100dvh;
  overflow: auto;
  background: var(--panel);
  border-left: 1px solid var(--line);
  padding: 1.2rem 1.15rem 2rem;
  transform: translateX(100%);
  visibility: hidden;
}
.deck-outline.is-open {
  transform: none;
  visibility: visible;
}
.deck-outline h2 {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
  margin: 0 0 0.9rem;
}
.deck-outline ol {
  list-style: none;
  margin: 0;
  padding: 0;
}
.deck-outline li + li { margin-top: 0.15rem; }
.deck-outline a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  border-bottom: none;
  padding: 0.35rem 0.45rem;
  border-radius: 4px;
  font-size: 0.88rem;
}
.deck-outline a:hover { color: var(--ink); }
.deck-outline a.is-current {
  color: var(--ink);
  background: var(--cyan-soft);
}

@media (max-width: 820px) {
  .q-grid,
  .fork,
  .term-list > div,
  .tiers > div,
  .goto li {
    grid-template-columns: 1fr;
  }
  .deck-chrome {
    grid-template-columns: 1fr;
  }
  .deck-meta { justify-content: space-between; }
  .slide-inner.wide { width: min(920px, 100%); }
}

@media (prefers-reduced-motion: reduce) {
  .deck-outline { transition: none; }
}

@media print {
  .deck-chrome,
  .deck-controls,
  .deck-outline,
  .deck-skip { display: none !important; }
  .deck, .slide, .slide.is-current {
    display: block !important;
    min-height: 0;
    page-break-after: always;
    padding: 0 0 2rem;
  }
  .slide:last-of-type { page-break-after: auto; }
}