/* Clickable diagram */
.diagram-container {
  position: relative;
  cursor: pointer;
  display: inline-block;
}

.diagram-container::after {
  content: "\01F50D  Click to expand";
  position: absolute;
  bottom: 10px;
  right: 10px;
  background: #4361EE;
  color: #fff;
  font-size: 12px;
  font-family: "Helvetica Neue", sans-serif;
  padding: 6px 14px;
  border-radius: 4px;
  pointer-events: none;
  transition: background 0.2s ease;
}

.diagram-container:hover::after {
  background: #3651D4;
}

/* Fullscreen modal overlay */
.diagram-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(0, 0, 0, 0.88);
  justify-content: center;
  align-items: center;
  padding: 2rem;
}

.diagram-modal.active {
  display: flex;
}

.diagram-modal img {
  max-width: 95vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: 4px;
  box-shadow: 0 4px 40px rgba(0, 0, 0, 0.4);
}

.diagram-modal-close {
  position: fixed;
  top: 1rem;
  right: 1.5rem;
  z-index: 10000;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  font-size: 14px;
  font-family: "Helvetica Neue", sans-serif;
  padding: 6px 16px;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s ease;
}

.diagram-modal-close:hover {
  background: rgba(255, 255, 255, 0.25);
}