/* ---------- Mind Map: circle-packing diagram from mindmap-data.xlsx ---------- */

.mindmap-main {
  padding: 56px 0 80px;
}

.mindmap-intro {
  max-width: 68ch;
  margin-bottom: 32px;
}

.mindmap-intro h1 {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.6vw, 34px);
  font-weight: 400;
  letter-spacing: -0.01em;
}

.mindmap-intro p {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.mindmap-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
}

.mindmap-regenerate {
  font-family: inherit;
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--ink);
  background: none;
  border: 1px solid var(--ink);
  border-radius: 999px;
  padding: 9px 18px;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease;
}

.mindmap-regenerate:hover {
  background: var(--ink);
  color: #ffffff;
}

.mindmap-status {
  font-size: 12px;
  color: var(--ink-soft);
}

.mindmap-stage {
  position: relative;
  width: 100%;
  border: 1px solid var(--hairline);
  border-radius: 8px;
  overflow: hidden;
  background: #fbfbfa;
}

.mindmap-stage svg {
  display: block;
  width: 100%;
  height: auto;
  max-height: 78vh;
  cursor: grab;
}

.mindmap-stage svg:active {
  cursor: grabbing;
}

.mindmap-link {
  stroke-width: 1.2px;
  opacity: 0.45;
}

.mindmap-container-label,
.mindmap-professor-label {
  pointer-events: none;
}

.mindmap-label {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
  font-family: inherit;
  line-height: 16px;
  pointer-events: none;
  user-select: none;
}

.mindmap-label--container {
  font-size: 10.5px;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.mindmap-label--professor {
  font-size: 10px;
  font-weight: 500;
  color: #ffffff;
  background: rgba(17, 17, 17, 0.4);
  border-radius: 3px;
}

.mindmap-tooltip {
  position: absolute;
  z-index: 5;
  max-width: 240px;
  padding: 10px 12px;
  background: #ffffff;
  border: 1px solid var(--hairline);
  border-radius: 6px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink);
  pointer-events: none;
}

.mindmap-tooltip a {
  color: var(--ink);
  pointer-events: auto;
}

.mindmap-tooltip-tag {
  display: inline-block;
  margin: 4px 4px 0 0;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  color: #ffffff;
}

.mindmap-legends {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 28px;
  margin-top: 32px;
}

.mindmap-legend h3 {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-weight: 500;
}

.mindmap-legend-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.mindmap-legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink);
}

.mindmap-legend-swatch {
  flex: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--hairline);
}

@media (max-width: 640px) {
  .mindmap-stage svg {
    max-height: 60vh;
  }
}