/* Slide-specific CSS for diagrams and demos */

/* ====== Diagram primitives ====== */

.box-3d {
  border: 2.5px solid var(--ink);
  background: var(--cream);
  border-radius: 10px;
  box-shadow: 5px 5px 0 var(--ink);
  padding: 18px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'Patrick Hand', cursive;
  font-size: 22px;
  font-weight: 700;
  text-align: center;
}

.flow-arrow {
  font-size: 48px;
  color: var(--red);
  font-family: 'Caveat', cursive;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* CNN architecture diagram */
.arch-flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  padding: 24px 0;
}

.arch-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.arch-cube {
  border: 2.5px solid var(--ink);
  background: var(--cream);
  border-radius: 8px;
  box-shadow: 4px 4px 0 var(--ink);
  padding: 14px 16px;
  font-family: 'Patrick Hand', cursive;
  font-size: 18px;
  font-weight: 700;
  min-width: 80px;
  text-align: center;
}

.arch-cube.conv { background: #f4d4a3; }
.arch-cube.pool { background: #b8d4a8; }
.arch-cube.fc { background: #d8b8d8; }
.arch-cube.bn { background: #a8c8d8; }
.arch-cube.relu { background: #f4b4a3; }
.arch-cube.input { background: var(--paper-dark); }
.arch-cube.output { background: var(--ink); color: var(--paper); }

.arch-cube .lbl { font-size: 14px; color: var(--ink-soft); margin-top: 2px; font-family: 'Kalam', cursive; }

/* Layer stack visualization (volumes) */
.vol-stack {
  position: relative;
  display: inline-block;
  perspective: 600px;
}
.vol-cube {
  border: 2px solid var(--ink);
  background: linear-gradient(135deg, var(--cream), var(--paper-dark));
  box-shadow: 4px 4px 0 var(--ink);
  position: relative;
}

/* Receptive field demo grids */
.rf-grid {
  display: grid;
  background: #fff;
  border: 2.5px solid var(--ink);
  border-radius: 6px;
  box-shadow: 4px 4px 0 var(--ink);
  overflow: hidden;
}
.rf-cell {
  border: 1px solid var(--line-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--ink-faint);
  transition: all 0.4s;
}
.rf-cell.active { background: var(--yellow); color: var(--ink); font-weight: 700; }
.rf-cell.highlight { background: var(--orange); color: var(--ink); font-weight: 700; }

/* Animated convolution kernel sliding */
.conv-anim-wrap {
  position: relative;
  display: inline-block;
}
.conv-kernel-overlay {
  position: absolute;
  border: 3px solid var(--red);
  background: rgba(232, 197, 71, 0.3);
  pointer-events: none;
  transition: all 0.6s ease-in-out;
  border-radius: 4px;
  box-shadow: 0 0 0 2px rgba(200, 85, 61, 0.3);
}

/* Filter library cards */
.filter-card {
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: 10px;
  box-shadow: 4px 4px 0 var(--ink);
  padding: 14px;
  text-align: center;
}
.filter-card-title {
  font-family: 'Caveat', cursive;
  font-size: 22px;
  color: var(--red);
  font-weight: 700;
  margin-bottom: 8px;
}
.filter-card .kvalues {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  margin: 8px 0;
}
.filter-card .kv {
  padding: 6px;
  background: #fff;
  border: 1px solid var(--ink-faint);
  text-align: center;
}

/* Big stat */
.stat-block {
  text-align: center;
  padding: 20px;
}
.stat-block .stat-num {
  font-family: 'Shippori Mincho', serif;
  font-size: 100px;
  font-weight: 800;
  color: var(--red);
  line-height: 1;
}
.stat-block .stat-num.green { color: var(--green); }
.stat-block .stat-num.blue { color: var(--blue); }
.stat-block .stat-label {
  font-family: 'Patrick Hand', cursive;
  font-size: 24px;
  color: var(--ink-soft);
  margin-top: 8px;
}

/* Pill list */
.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: var(--cream);
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  font-family: 'Kalam', cursive;
  font-weight: 700;
  font-size: 22px;
  box-shadow: 3px 3px 0 var(--ink);
}
.pill.active { background: var(--yellow); }

/* ResNet skip connection diagram */
.skip-diagram {
  position: relative;
  padding: 40px 20px;
}

/* YOLO grid demo */
.yolo-grid-vis {
  display: grid;
  border: 3px solid var(--ink);
  background: linear-gradient(135deg, #c8b89c 0%, #a89878 100%);
  box-shadow: 5px 5px 0 var(--ink);
}
.yolo-cell {
  border: 1px dashed rgba(255, 255, 255, 0.4);
  position: relative;
  transition: background 0.3s;
}
.yolo-cell.responsible {
  background: rgba(232, 197, 71, 0.5);
}
.yolo-cell.dot::after {
  content: '';
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--red);
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
}
.yolo-bbox {
  position: absolute;
  border: 3px solid var(--red);
  border-radius: 4px;
  pointer-events: none;
}
.yolo-bbox.gt { border-color: var(--orange); border-style: solid; }
.yolo-bbox.pred { border-color: var(--blue); border-style: dashed; }

/* Timeline */
.timeline {
  position: relative;
  padding: 0 0 0 40px;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 12px; top: 8px; bottom: 8px;
  width: 4px;
  background: var(--ink);
  border-radius: 2px;
}
.timeline-item {
  position: relative;
  padding: 12px 0 24px;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px; top: 18px;
  width: 18px; height: 18px;
  background: var(--red);
  border: 2.5px solid var(--ink);
  border-radius: 50%;
  box-shadow: inset -2px -2px 3px rgba(0,0,0,0.2);
}
.timeline-item .year {
  font-family: 'Caveat', cursive;
  font-size: 28px;
  color: var(--red);
  font-weight: 700;
}
.timeline-item .name {
  font-family: 'Shippori Mincho', serif;
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 4px;
}
.timeline-item .desc {
  font-family: 'Patrick Hand', cursive;
  font-size: 22px;
  color: var(--ink-soft);
  line-height: 1.5;
}

/* Gradient flow demo (for ResNet) */
.gradient-bar {
  display: flex;
  gap: 4px;
  align-items: end;
  height: 100px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.3);
  border: 2px dashed var(--line);
  border-radius: 6px;
}
.grad-col {
  flex: 1;
  background: var(--green);
  border-radius: 2px;
  min-height: 4px;
  transition: all 0.4s;
}