Add styling for pedigree tree visualization

client/src/components/PedigreeView.css

@@ -0,0 +1,137 @@
+.pedigree-modal {
+  position: relative;
+  width: 95vw;
+  height: 90vh;
+  background: white;
+  border-radius: 12px;
+  display: flex;
+  flex-direction: column;
+  overflow: hidden;
+}
+
+.pedigree-container {
+  flex: 1;
+  background: linear-gradient(to bottom, #f8fafc 0%, #e2e8f0 100%);
+  position: relative;
+  overflow: hidden;
+}
+
+.pedigree-controls {
+  display: flex;
+  gap: 0.5rem;
+  align-items: center;
+}
+
+.pedigree-legend {
+  display: flex;
+  gap: 2rem;
+  padding: 0.75rem 1.5rem;
+  background: #f1f5f9;
+  border-bottom: 1px solid #e2e8f0;
+  justify-content: center;
+}
+
+.legend-item {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  font-size: 0.875rem;
+  color: #475569;
+}
+
+.legend-color {
+  width: 20px;
+  height: 20px;
+  border-radius: 50%;
+  border: 2px solid #fff;
+  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
+}
+
+.legend-color.male {
+  background: #3b82f6;
+}
+
+.legend-color.female {
+  background: #ec4899;
+}
+
+.pedigree-info {
+  padding: 0.75rem 1.5rem;
+  background: #f8fafc;
+  border-top: 1px solid #e2e8f0;
+  font-size: 0.875rem;
+  color: #64748b;
+  text-align: center;
+}
+
+.pedigree-info p {
+  margin: 0;
+}
+
+.pedigree-info strong {
+  color: #334155;
+}
+
+/* Override react-d3-tree styles */
+.rd3t-tree-container {
+  width: 100%;
+  height: 100%;
+}
+
+.rd3t-link {
+  stroke: #94a3b8;
+  stroke-width: 2;
+  fill: none;
+}
+
+.rd3t-node {
+  cursor: pointer;
+}
+
+.rd3t-node:hover circle {
+  filter: brightness(1.1);
+}
+
+.rd3t-label__title {
+  font-weight: 600;
+  fill: #1e293b;
+}
+
+.rd3t-label__attributes {
+  font-size: 0.875rem;
+  fill: #64748b;
+}
+
+/* Loading state */
+.pedigree-modal .loading {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  height: 400px;
+  font-size: 1.125rem;
+  color: #64748b;
+}
+
+/* Error state */
+.pedigree-modal .error {
+  margin: 2rem;
+  padding: 1rem;
+  background: #fee;
+  border: 1px solid #fcc;
+  border-radius: 8px;
+  color: #c00;
+}
+
+/* Responsive adjustments */
+@media (max-width: 768px) {
+  .pedigree-modal {
+    width: 100vw;
+    height: 100vh;
+    border-radius: 0;
+  }
+  
+  .pedigree-legend {
+    flex-wrap: wrap;
+    gap: 1rem;
+  }
+}