/* ER Diagram Panel Styles */

.er-diagram-panel {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  position: relative;
}

.er-diagram-panel svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ER Node Styles */
.er-node {
  cursor: pointer;
  transition: filter 0.15s;
}

.er-node:hover .er-node-bg {
  stroke: var(--accent);
  stroke-width: 1.5px;
}

.er-node-bg {
  fill: var(--surface-1);
  stroke: var(--border);
  stroke-width: 1px;
  transition: stroke 0.15s, fill 0.15s;
}

.er-node-header {
  fill: var(--surface-2);
}

.er-node-title {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  fill: var(--text);
}

.er-col-name {
  font-family: var(--mono);
  font-size: 11.5px;
  fill: var(--text);
}

.er-col-type {
  font-family: var(--mono);
  font-size: 10.5px;
  fill: var(--text-dim);
}

/* Selected state */
.er-node-selected .er-node-bg {
  stroke: var(--accent);
  stroke-width: 2px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.er-node-selected .er-node-title {
  fill: var(--accent-bright);
}

/* PK Badge */
.er-pk-badge {
  fill: var(--accent);
}

/* FK Indicator */
.er-fk-dot {
  fill: var(--accent);
  opacity: 0.6;
}

/* FK Lines */
.er-fk-line {
  stroke: var(--accent);
  stroke-width: 1.5px;
  stroke-dasharray: 4, 2;
  fill: none;
  opacity: 0.6;
}

.er-fk-arrow {
  fill: var(--accent);
  opacity: 0.6;
}

/* Zoom Controls */
.er-zoom-controls {
  position: absolute;
  bottom: 16px;
  right: 16px;
  display: flex;
  gap: 4px;
  z-index: 10;
}

.er-zoom-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-size: 16px;
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--sans);
}

.er-zoom-btn:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  color: var(--accent-bright);
}

.er-zoom-btn:active {
  transform: scale(0.95);
}

/* Empty State */
.er-empty-state {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  color: var(--text-dim);
}

.er-empty-state h3 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.er-empty-state p {
  font-size: 13px;
  line-height: 1.5;
}

/* Loading State */
.er-loading {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 12px;
  color: var(--text-dim);
}

/* Columns Panel (right sidebar) */
.columns-panel {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
}

.columns-panel h3 {
  font-family: var(--serif);
  font-style: italic;
  font-size: 24px;
  margin-bottom: 4px;
}

.columns-panel .hint {
  font-size: 11px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.column-row {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 8px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
}

.column-row:last-child {
  border-bottom: none;
}

.column-name {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text);
}

.column-type {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--text-dim);
}

.column-badges {
  display: flex;
  gap: 4px;
}

.col-badge {
  padding: 2px 6px;
  border-radius: 2px;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.col-badge.pk {
  background: rgba(224, 138, 60, 0.15);
  color: var(--accent-bright);
}

.col-badge.fk {
  background: rgba(163, 201, 104, 0.15);
  color: var(--success);
}

.col-badge.null {
  background: var(--surface-2);
  color: var(--text-dim);
}

/* ─── Schema Diff Node Styles ────────────────────────────────────── */

.diff-source-only .er-node-bg {
  fill: rgba(63, 195, 108, 0.15);
  stroke: #3fc36c;
}

.diff-target-only .er-node-bg {
  fill: rgba(239, 68, 68, 0.12);
  stroke: #ef4444;
}

.diff-different .er-node-bg {
  fill: rgba(251, 191, 36, 0.15);
  stroke: #fbbf24;
}

.diff-source-only .er-node-header {
  fill: rgba(63, 195, 108, 0.25);
}

.diff-target-only .er-node-header {
  fill: rgba(239, 68, 68, 0.25);
}

.diff-different .er-node-header {
  fill: rgba(251, 191, 36, 0.25);
}

.diff-shape-icon {
  fill: rgba(255, 255, 255, 0.7);
  stroke: none;
}

.diff-badge {
  font-size: 9px;
  fill: var(--text-dim);
  font-family: var(--mono);
}

.diff-summary-text {
  font-size: 10px;
  fill: var(--text-dim);
  font-style: italic;
}

.schema-diff-panel {
  padding: 12px;
}

.diff-selector-row {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 12px;
}

.diff-selector-row label {
  font-size: 12px;
  color: var(--text-dim);
}

.diff-selector-row select {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 8px;
  color: var(--text);
  font-size: 12px;
  font-family: var(--mono);
}

.diff-legend {
  display: flex;
  gap: 16px;
  margin-bottom: 10px;
  font-size: 11px;
  color: var(--text-dim);
}

.diff-legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.diff-legend-swatch {
  width: 12px;
  height: 12px;
  border-radius: 3px;
  display: inline-block;
}

.diff-legend-source { background: rgba(63, 195, 108, 0.4); border: 1px solid #3fc36c; }
.diff-legend-target { background: rgba(239, 68, 68, 0.3); border: 1px solid #ef4444; }
.diff-legend-different { background: rgba(251, 191, 36, 0.4); border: 1px solid #fbbf24; }

.er-empty-state-text {
  font-family: var(--sans);
  font-size: 13px;
  fill: var(--text-dim);
}