/* Mermaid diagrams — click to enlarge, slow open/close transition, close button. */

.sd-article,
.interview-guide-article {
  overflow-x: clip;
}

.sd-diagram-wrap {
  --rest-min-height: 140px;
  position: relative;
  margin: 18px 0;
  min-height: var(--rest-min-height);
  padding: 12px 14px 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  cursor: zoom-in;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.sd-diagram-wrap:hover {
  border-color: rgba(26, 61, 107, 0.35);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.sd-diagram-wrap:focus-visible {
  outline: 2px solid var(--phase2);
  outline-offset: 2px;
}

.sd-diagram-stage {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.sd-diagram-wrap pre.mermaid {
  margin: 0;
  padding: 0;
  border: none;
  background: transparent;
  overflow: visible;
  font-size: 12px;
  pointer-events: none;
}

.sd-diagram-wrap svg {
  display: block;
  max-width: 100%;
  height: auto;
  pointer-events: none;
}

/* —— Full-screen modal —— */
.sd-diagram-modal {
  --sd-diagram-transition: 0.55s;
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: max(20px, 4vh) max(16px, 4vw);
  pointer-events: none;
  visibility: hidden;
}

.sd-diagram-modal:not([hidden]) {
  visibility: visible;
}

.sd-diagram-modal.is-active {
  pointer-events: auto;
}

.sd-diagram-modal__backdrop {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 0;
  border: none;
  cursor: pointer;
  background: rgba(9, 12, 20, 0);
  backdrop-filter: blur(0);
  transition:
    background var(--sd-diagram-transition) ease,
    backdrop-filter var(--sd-diagram-transition) ease;
}

.sd-diagram-modal.is-active .sd-diagram-modal__backdrop {
  background: rgba(9, 12, 20, 0.78);
  backdrop-filter: blur(6px);
}

.sd-diagram-modal__panel {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  max-width: min(96vw, 1280px);
  max-height: min(88vh, 900px);
  width: max-content;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 28px 72px rgba(0, 0, 0, 0.35);
  opacity: 0;
  transform: scale(0.9) translateY(16px);
  transition:
    opacity var(--sd-diagram-transition) ease,
    transform var(--sd-diagram-transition) ease;
}

.sd-diagram-modal.is-active .sd-diagram-modal__panel {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.sd-diagram-modal__close {
  position: absolute;
  top: 10px;
  right: 10px;
  z-index: 2;
  margin: 0;
  padding: 8px 14px;
  font-family: "Syne", system-ui, sans-serif;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition:
    background 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease;
}

.sd-diagram-modal__close:hover {
  background: var(--card);
  border-color: rgba(26, 61, 107, 0.45);
  color: var(--phase2);
}

.sd-diagram-modal__close:focus-visible {
  outline: 2px solid var(--phase2);
  outline-offset: 2px;
}

.sd-diagram-modal__content {
  overflow: auto;
  padding: 48px 26px 26px;
  -webkit-overflow-scrolling: touch;
}

.sd-diagram-modal__content svg {
  display: block;
  width: auto;
  min-width: min(88vw, 1100px);
  max-width: none;
  height: auto;
}

body.sd-diagram-modal-open {
  overflow: hidden;
}

@media (hover: none) {
  .sd-diagram-stage {
    overflow-x: auto;
  }

  .sd-diagram-wrap svg {
    min-width: 520px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sd-diagram-modal,
  .sd-diagram-modal__backdrop,
  .sd-diagram-modal__panel {
    --sd-diagram-transition: 0.01ms;
  }
}