/* カスタムスタイル */
body {
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
}

.nav-link.active {
  background-color: #1d4ed8;
  color: white;
}

.spinner {
  border: 3px solid #f3f3f3;
  border-top: 3px solid #1d4ed8;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

table.data-table th {
  position: sticky;
  top: 0;
  background: #f9fafb;
}

.modal-overlay {
  background: rgba(0,0,0,0.5);
}