/* ============================================================
 *  Skosmos Graph Visualizer Plugin — Styles
 * ============================================================ */

/* ── Main wrapper ────────────────────────────────────────────── */
#graph-visualizer {
  margin-top: 1rem;
  border: 1px solid var(--light-color, #dfe5ed);
  border-radius: 6px;
  overflow: hidden;
  width: 100%;
}

/* ── Header (toggle bar) ─────────────────────────────────────── */
#graph-visualizer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: var(--secondary-light-color, #f2f5f7);
  cursor: pointer;
  user-select: none;
  border-bottom: 1px solid var(--light-color, #dfe5ed);
}

.graph-visualizer-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--dark-color, #0d284e);
}

#graph-visualizer-toggle {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--dark-color, #0d284e);
  font-size: 0.9rem;
  padding: 0.2rem 0.4rem;
}

/* ── Toolbar ─────────────────────────────────────────────────── */
#graph-visualizer-toolbar {
  display: flex;
  gap: 0.4rem;
  padding: 0.5rem 0.75rem;
  background: var(--white-color, #ffffff);
  border-bottom: 1px solid var(--light-color, #dfe5ed);
  flex-wrap: wrap;
}

.graph-viz-btn {
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--medium-color, #1b709d);
  border-radius: 4px;
  background: var(--white-color, #ffffff);
  color: var(--medium-color, #1b709d);
  font-size: 0.8rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.graph-viz-btn:hover {
  background: var(--secondary-light-color, #f2f5f7);
}

.graph-viz-btn.active {
  background: var(--medium-color, #1b709d);
  color: var(--white-color, #ffffff);
  border-color: var(--medium-color, #1b709d);
}

/* ── Graph container ─────────────────────────────────────────── */
#graph-visualizer-container {
  position: relative;
  min-height: 500px;
  background: var(--secondary-light-color, #f2f5f7);
}

/* ── Loading spinner ─────────────────────────────────────────── */
.graph-viz-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  gap: 0.8rem;
  color: var(--muted-color, #6C778A);
  font-size: 0.9rem;
}

.graph-viz-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--light-color, #dfe5ed);
  border-top-color: var(--medium-color, #1b709d);
  border-radius: 50%;
  animation: graph-viz-spin 0.8s linear infinite;
}

@keyframes graph-viz-spin {
  to { transform: rotate(360deg); }
}

/* ── Legend ───────────────────────────────────────────────────── */
#graph-visualizer-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding: 0.5rem 0.75rem;
  background: var(--white-color, #ffffff);
  border-top: 1px solid var(--light-color, #dfe5ed);
  font-size: 0.75rem;
  color: var(--dark-color, #0d284e);
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  white-space: nowrap;
}

.legend-dot {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot.legend-current {
  background: var(--medium-color, #1b709d);
  border: 2px solid var(--dark-color, #0d284e);
}

.legend-dot.legend-broader {
  background: var(--dark-color, #0d284e);
}

.legend-dot.legend-related {
  background: var(--secondary-medium-color, #b8c9db);
}

.legend-line {
  display: inline-block;
  width: 20px;
  height: 0;
  border-top: 2px solid var(--dark-color, #0d284e);
  vertical-align: middle;
}

.legend-line.legend-dashed {
  border-top-style: dashed;
  border-top-color: var(--secondary-medium-color, #b8c9db);
}

/* ── Tooltip ─────────────────────────────────────────────────── */
#graph-viz-tooltip {
  display: none;
  position: absolute;
  padding: 0.4rem 0.6rem;
  background: var(--dark-color, #0d284e);
  color: var(--white-color, #ffffff);
  font-size: 0.75rem;
  border-radius: 4px;
  pointer-events: none;
  z-index: 10;
  max-width: 280px;
  white-space: pre-line;
  line-height: 1.4;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

/* ── Empty / Error / Warning states ──────────────────────────── */
.graph-viz-empty,
.graph-viz-error {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--muted-color, #6C778A);
  font-size: 0.9rem;
  padding: 2rem;
  text-align: center;
}

.graph-viz-error {
  color: var(--alert-color, #a0270a);
}

.graph-viz-warning {
  padding: 0.5rem 0.75rem;
  background: #fff3cd;
  border-bottom: 1px solid #ffc107;
  color: #664d03;
  font-size: 0.8rem;
}

/* ── Responsive ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  #graph-visualizer-container {
    min-height: 350px;
  }

  .graph-viz-loading {
    min-height: 350px;
  }

  #graph-visualizer-legend {
    gap: 0.5rem;
    font-size: 0.7rem;
  }
}