/* ─── Info Panel (contextual educational panel) ─── */

.info-panel {
  position: absolute;
  top: 12px;
  left: 12px;
  width: 280px;
  max-height: calc(100% - 24px);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  z-index: 10;
  backdrop-filter: blur(12px);
  overflow-y: auto;
  transition: opacity 0.25s ease;
}

.info-panel__header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1rem 0.5rem;
  border-bottom: 1px solid var(--border);
}

.info-panel__icon {
  font-size: 1.1rem;
  line-height: 1;
  flex-shrink: 0;
}

.info-panel__title {
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-bright);
  line-height: 1.3;
}

.info-panel__body {
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.info-panel__text {
  font-family: var(--font-ui);
  font-size: 0.75rem;
  color: var(--text);
  line-height: 1.65;
}

.info-panel__text strong {
  color: var(--text-bright);
  font-weight: 600;
}

.info-panel__formula {
  font-family: var(--font);
  font-size: 0.72rem;
  color: var(--accent);
  background: rgba(167, 139, 250, 0.08);
  border: 1px solid rgba(167, 139, 250, 0.15);
  padding: 0.5rem 0.65rem;
  border-radius: 6px;
  line-height: 1.5;
  white-space: pre-wrap;
}

.info-panel__detail {
  font-family: var(--font);
  font-size: 0.68rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.03);
  padding: 0.45rem 0.65rem;
  border-radius: 6px;
  line-height: 1.5;
}

.info-panel__detail span {
  color: var(--text);
}