/* ═══════════════════════════════════════════════════════════════════
   SITU · Knowledge Graph (d3-force version)
   ═══════════════════════════════════════════════════════════════════ */

.sk-stage {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.sk-svg { display: block; cursor: grab; }
.sk-svg.is-panning { cursor: grabbing; }

.sk-link {
  stroke: rgba(157, 130, 89, 0.30);
  stroke-width: 1;
  fill: none;
  pointer-events: none;
  transition: stroke 200ms ease, stroke-opacity 200ms ease;
}
.sk-link.is-dashed { stroke-dasharray: 4 3; }
.sk-link.is-dim    { stroke-opacity: 0.18; }
.sk-link.is-highlight {
  stroke: var(--aura, #c8912f);
  stroke-width: 1.6;
  stroke-opacity: 1;
}

.sk-node {
  cursor: pointer;
  transition: filter 200ms ease;
}
.sk-node:hover { filter: brightness(1.2); }

.sk-node-circle {
  stroke: rgba(243, 233, 212, 0.4);
  stroke-width: 1;
  transition: stroke-width 160ms ease, stroke 160ms ease, opacity 200ms ease;
}
.sk-node-circle.is-core {
  fill: var(--aura, #c8912f);
  stroke: var(--aura-bright, #f2c47a);
  stroke-width: 2;
}
.sk-node-circle.is-template {
  fill: rgba(200, 145, 47, 0.65);
  stroke: rgba(243, 233, 212, 0.55);
}
.sk-node-circle.is-instance {
  fill: rgba(243, 233, 212, 0.85);
  stroke: rgba(200, 145, 47, 0.4);
}
.sk-node-circle.is-unit {
  fill: rgba(160, 106, 26, 0.7);
  stroke: rgba(243, 233, 212, 0.4);
}
.sk-node-circle.is-dim { opacity: 0.22; }
.sk-node-circle.is-highlight {
  stroke: var(--aura-bright, #f2c47a);
  stroke-width: 2.5;
}

.sk-node-label {
  font: 500 10px/1 var(--f-body, sans-serif);
  fill: var(--ink-1, #3a2f22);
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
  transition: opacity 200ms ease;
}
.sk-node-label.is-dim { opacity: 0.22; }
.sk-node-label.is-core-label {
  font: 600 13px/1 var(--f-display, serif);
  letter-spacing: 0.02em;
}

/* ── Overlay controls (top of stage) ── */
.sk-controls {
  position: absolute;
  top: 10px; left: 12px;
  display: flex; gap: 6px;
  z-index: 5;
  pointer-events: auto;
}
.sk-chip {
  padding: 5px 10px;
  background: rgba(243, 233, 212, 0.92);
  border: 1px solid rgba(157, 130, 89, 0.4);
  border-radius: var(--r-pill, 999px);
  font: 500 10px var(--f-mono, monospace);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ink-2, #5d4f3d);
  cursor: pointer;
  transition: all 160ms ease;
  user-select: none;
}
.sk-chip:hover {
  background: #fff;
  border-color: var(--aura, #c8912f);
  color: var(--ink-1, #3a2f22);
}
.sk-chip.is-on {
  background: var(--aura, #c8912f);
  border-color: var(--aura, #c8912f);
  color: #fff;
}
.sk-chip-count {
  margin-left: 4px;
  opacity: 0.65;
  font-size: 9px;
}

/* ── Zoom indicator + reset ── */
.sk-zoom {
  position: absolute;
  top: 10px; right: 12px;
  display: flex; gap: 4px;
  z-index: 5;
}
.sk-zoom-btn {
  width: 26px; height: 26px;
  background: rgba(243, 233, 212, 0.92);
  border: 1px solid rgba(157, 130, 89, 0.4);
  border-radius: var(--r-sm, 6px);
  color: var(--ink-2, #5d4f3d);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font: 600 13px sans-serif;
  transition: background 160ms ease;
}
.sk-zoom-btn:hover { background: #fff; color: var(--ink-1, #3a2f22); }

/* ── Side panel (click node to open) ── */
.sk-panel {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 280px;
  background: rgba(243, 233, 212, 0.97);
  border-left: 1px solid rgba(157, 130, 89, 0.32);
  padding: 18px 18px 18px 18px;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 280ms cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 10;
}
.sk-panel.is-open { transform: translateX(0); }
.sk-panel-close {
  position: absolute;
  top: 10px; right: 12px;
  background: transparent;
  border: none;
  font-size: 18px;
  color: var(--ink-3, #9b8c75);
  cursor: pointer;
  line-height: 1;
}
.sk-panel-close:hover { color: var(--ink-1, #3a2f22); }
.sk-panel-kind {
  font: 500 9px var(--f-mono, monospace);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--aura, #c8912f);
  margin-bottom: 6px;
}
.sk-panel-title {
  font: 500 17px/1.3 var(--f-display, serif);
  color: var(--ink-0, #2a1f12);
  margin: 0 0 4px;
}
.sk-panel-subtitle {
  font: 13px var(--f-body, sans-serif);
  color: var(--ink-2, #5d4f3d);
  margin-bottom: 14px;
  font-style: italic;
}
.sk-panel-field {
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px dashed rgba(157, 130, 89, 0.22);
}
.sk-panel-field:last-child { border-bottom: none; }
.sk-panel-field-label {
  font: 500 10px var(--f-mono, monospace);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-3, #9b8c75);
  margin-bottom: 4px;
}
.sk-panel-field-value {
  font: 13px/1.5 var(--f-body, sans-serif);
  color: var(--ink-1, #3a2f22);
  white-space: pre-wrap;
  word-break: break-word;
}
.sk-panel-field-value code {
  font-size: 11px;
  background: rgba(70, 50, 30, 0.08);
  padding: 1px 5px;
  border-radius: 3px;
}