/* Full-screen slideshow overlay */
body.slideshow-open {
  overflow: hidden;
}

.slideshow-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.75);
  display: none;
}

.slideshow-overlay.open {
  display: block;
}

.slideshow-shell {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: #f5f2eb;
  color: #1a1814;
}

.slideshow-topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid #d4d0c4;
  background: #edeae0;
}

.slideshow-title {
  font-size: 14px;
  font-weight: 600;
}

.slideshow-counter {
  margin-left: auto;
  font-size: 12px;
  color: #6a6760;
}

.slideshow-btn {
  border: 1px solid #d4d0c4;
  background: #f5f2eb;
  color: #1a1814;
  border-radius: 6px;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  font-size: 12px;
}

.slideshow-btn:disabled {
  opacity: 0.45;
  cursor: default;
}

.slideshow-btn.close {
  margin-left: 0.5rem;
}

.slideshow-stage {
  flex: 1;
  overflow: auto;
  padding: 0;
}

.ss-deck {
  min-height: 100%;
}

.ss-deck .slide {
  min-height: calc(100dvh - 57px);
  display: none;
  padding: 3rem 4rem;
  animation: ssFade 0.2s ease;
}

.ss-deck .slide.active {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

@keyframes ssFade {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.slide-title-card {
  align-items: center;
  text-align: center;
}

.slide-eyebrow {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #8a877e;
  margin-bottom: 0.75rem;
}

.slide-title-card h2 {
  font-size: 42px;
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.slide-sub {
  max-width: 700px;
  color: #4a4740;
}

.slide-content h3,
.slide-diagram h3 {
  font-size: 28px;
  margin-bottom: 1rem;
}

.slide-content p,
.slide-note {
  color: #4a4740;
  line-height: 1.8;
}

.slide-note {
  margin-top: 0.5rem;
  font-size: 13px;
}

.mem-diagram {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  margin-top: 0.75rem;
}

.mem-zone {
  flex: 1;
}

.mem-title {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #8a877e;
  margin-bottom: 0.5rem;
}

.mem-box {
  border: 1px solid #d4d0c4;
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.mem-row {
  display: flex;
  gap: 0.5rem;
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid #e3dfd3;
  font-size: 13px;
}

.mem-row:last-child {
  border-bottom: none;
}

.mem-sep {
  display: flex;
  align-items: center;
  color: #8a877e;
  font-size: 20px;
}

.mem-addr {
  color: #8a877e;
  width: 50px;
  flex-shrink: 0;
}

.mem-key {
  color: #1a3f6b;
}

.point-list {
  list-style: none;
  margin-top: 0.5rem;
}

.point-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  padding: 0.45rem 0;
  border-bottom: 1px solid #d4d0c4;
}

.point-list li:last-child {
  border-bottom: none;
}

.bullet {
  color: #c0392b;
  width: 20px;
  flex-shrink: 0;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.col-card {
  border: 1px solid #d4d0c4;
  border-radius: 8px;
  background: #edeae0;
  padding: 1rem;
}

.col-card .label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #8a877e;
  margin-bottom: 0.35rem;
}

.col-card h4 {
  font-size: 18px;
  margin-bottom: 0.5rem;
}

.col-card p,
.col-card li {
  font-size: 14px;
  color: #4a4740;
}

.col-card ul {
  margin-left: 1rem;
}

.s-pre {
  background: #1a1814;
  color: #d4d0c8;
  border-radius: 8px;
  padding: 1rem 1.1rem;
  margin-top: 0.75rem;
  overflow-x: auto;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  line-height: 1.7;
  white-space: pre;
}

.callout {
  border-left: 3px solid #c0392b;
  background: #fdf0ee;
  border-radius: 0 8px 8px 0;
  padding: 0.75rem 1rem;
  margin-top: 0.85rem;
}

.callout-blue {
  border-left-color: #1a3f6b;
  background: #eef2f8;
}

.callout-green {
  border-left-color: #1a6b3c;
  background: #eef7f2;
}

.slide-end {
  align-items: center;
  text-align: center;
  gap: 1rem;
}

.slide-back-btn {
  border: 1px solid #d4d0c4;
  border-radius: 8px;
  padding: 0.65rem 1.15rem;
  font-size: 14px;
  background: #edeae0;
  cursor: pointer;
}

.slide-back-btn:hover {
  border-color: #c0392b;
  color: #c0392b;
}

.kw { color: #c792ea; }
.ty { color: #82aaff; }
.str { color: #c3e88d; }
.cm { color: #8aa1a8; font-style: italic; }
.num { color: #f78c6c; }
.fn { color: #82aaff; }
.an { color: #ffcb6b; }

@media (max-width: 860px) {
  .ss-deck .slide {
    padding: 1.5rem 1rem;
    min-height: calc(100dvh - 52px);
  }

  .slide-title-card h2 {
    font-size: 32px;
  }

  .slide-content h3,
  .slide-diagram h3 {
    font-size: 22px;
  }

  .two-col {
    grid-template-columns: 1fr;
  }
}