/* ==========================================================================
   Influence Sankey — D3 Sankey diagram container + tooltip
   Loaded on the-issue page only via d3sankey front matter
   ========================================================================== */

/* --- Section --- */
.influence-flow-section {
  margin: 2.5rem 0;
  padding: 1.5rem 0;
  border-top: 0.5px solid var(--d4arf-border);
}

.influence-flow-heading {
  font-family: var(--font-elegant);
  font-weight: 400;
  font-size: 1.25rem;
  color: var(--d4arf-black);
  margin: 0 0 0.35rem;
  line-height: 1.3;
}

.influence-flow-sub {
  font-size: 0.85rem;
  color: var(--d4arf-gray);
  margin: 0 0 1.25rem;
  line-height: 1.55;
  max-width: 640px;
}

/* --- Chart container --- */
.influence-sankey-container {
  position: relative;
  max-width: 780px;
  overflow: visible;
}

#influence-sankey svg {
  display: block;
}

/* --- Tooltip --- */
.sankey-tooltip {
  position: absolute;
  z-index: 20;
  pointer-events: none;
  background: var(--color-bg-surface, #fff);
  border: 1px solid var(--d4arf-border);
  border-left: 3px solid var(--d4arf-accent);
  border-radius: 0 2px 2px 0;
  padding: 0.5rem 0.7rem;
  max-width: 280px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  font-family: var(--font-body);
  font-size: 0.8rem;
  color: var(--d4arf-black);
  line-height: 1.45;
}

/* --- Custom legend --- */
.sankey-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 0.75rem;
  padding-top: 0.5rem;
}

.sankey-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
  color: var(--d4arf-gray);
}

.sankey-legend-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}

/* --- Note --- */
.influence-flow-note {
  font-size: 0.8rem;
  color: var(--d4arf-gray);
  line-height: 1.55;
  margin: 0.75rem 0 0;
  font-style: italic;
}

/* --- Dark mode --- */
[data-theme="dark"] .influence-flow-section {
  border-top-color: rgba(255, 255, 255, 0.08);
}

[data-theme="dark"] .sankey-tooltip {
  background: #1A1A24;
  border-color: var(--d4arf-border);
  border-left-color: var(--d4arf-accent);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* --- Responsive --- */
@media (max-width: 600px) {
  .influence-sankey-container {
    overflow-x: auto;
  }

  #influence-sankey svg {
    min-width: 580px;
  }

  .sankey-legend {
    gap: 0.5rem;
  }

  .sankey-legend-item {
    font-size: 0.65rem;
  }

  .sankey-tooltip {
    display: none !important;
  }
}