:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: #f6f7f9;
  color: #111;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  background: #f6f7f9;
}

.page-shell {
  max-width: 980px;
  margin: 0 auto;
  padding: 16px;
}

.topbar {
  background: #1a73e8;
  color: white;
  border-radius: 14px;
  padding: 18px 16px;
  margin-bottom: 16px;
}

.topbar h1 {
  margin: 0 0 8px;
  font-size: 1.4rem;
}

.topbar p {
  margin: 0;
  opacity: 0.92;
  line-height: 1.5;
}

.search-panel {
  background: white;
  border-radius: 14px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
}

.field-label {
  display: block;
  margin-bottom: 10px;
  font-size: 0.95rem;
  color: #333;
}

.search-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

.search-row input[type="search"] {
  width: 100%;
  border: 1px solid #d5d7db;
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 1rem;
}

.search-row button {
  border: none;
  background: #1a73e8;
  color: white;
  border-radius: 12px;
  padding: 12px 18px;
  cursor: pointer;
  font-size: 1rem;
}

.options-row {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.options-row label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 999px;
  background: #eef3ff;
  color: #1e293b;
  font-size: 0.92rem;
}

.browse-row {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.browse-row button {
  border: 1px solid #cbd5e1;
  background: white;
  color: #1e293b;
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-size: 0.95rem;
}

.browse-row button:hover {
  background: #f8fafc;
}

.results-section {
  display: grid;
  gap: 16px;
}

.summary {
  background: white;
  padding: 14px 16px;
  border-radius: 14px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
  font-size: 0.95rem;
}

.tree-container,
.list-container {
  background: white;
  border-radius: 14px;
  padding: 16px;
  box-shadow: 0 10px 25px rgba(15, 23, 42, 0.06);
}

.tree-node {
  margin-bottom: 14px;
}

.tree-node .node-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.tree-node .node-heading {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: nowrap;
}

.tree-node .toggle-icon {
  display: inline-flex;
  width: 18px;
  min-width: 18px;
  justify-content: center;
  color: #1d4ed8;
  transition: transform 0.2s ease;
}

.node-title {
  flex: 1;
  min-width: 0;
}

.matched-node .node-title {
  color: #0f766e;
}


.node-title {
  white-space: normal;
  min-width: 0;
}

.tree-node.has-children .node-label {
  cursor: pointer;
}

.tree-node.collapsed > .node-details {
  display: none;
}

.tree-node .toggle-icon {
  transform: rotate(0deg);
}

.node-title,
.item-title {
  font-weight: 700;
  margin: 0;
}

.node-meta,
.item-meta {
  color: #4b5563;
  font-size: 0.9rem;
  line-height: 1.4;
}

.node-details,
.item-details {
  margin-top: 8px;
}

.node-code-row {
  margin-top: 8px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.code-inline-link {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: #e0f2fe;
  color: #0c4a6e;
  font-weight: 700;
  text-decoration: none;
  border: 1px solid #bae6fd;
}

.code-inline-link:hover {
  background: #bae6fd;
}

.tabular-panel {
  display: grid;
  gap: 10px;
}

.tabular-title {
  font-weight: 700;
  color: #0f172a;
}

.tabular-path {
  color: #64748b;
  font-size: 0.86rem;
  word-break: break-all;
}

.tabular-list {
  margin: 0;
  padding-left: 18px;
}

.tabular-list li {
  line-height: 1.5;
}

.tabular-pdf-frame {
  margin: 0;
  width: 100%;
  height: 65vh;
  min-height: 420px;
  border: 1px solid #e2e8f0;
  border-radius: 10px;
  background: #fff;
}

.tabular-ios-fallback {
  display: grid;
  gap: 8px;
}

.tabular-pdf-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: fit-content;
  padding: 8px 12px;
  border-radius: 8px;
  border: 1px solid #93c5fd;
  background: #eff6ff;
  color: #1d4ed8;
  font-weight: 600;
  text-decoration: none;
}

.tabular-pdf-link:hover {
  background: #dbeafe;
}

.tabular-empty {
  margin: 0;
  color: #64748b;
}

.item-code {
  display: block;
  margin-top: 8px;
  font-size: 0.95rem;
  color: #111827;
}

.reference-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: #eef2ff;
  color: #3730a3;
  font-size: 0.88rem;
  text-decoration: none;
  margin-right: 6px;
  margin-bottom: 6px;
}

.reference-chip:hover {
  background: #dbe4ff;
}

.child-list {
  margin: 10px 0 0 12px;
  padding-left: 12px;
  border-left: 2px solid #e2e8f0;
}

.path-children {
  margin: 10px 0 0 12px;
  padding-left: 12px;
  border-left: 2px solid #e2e8f0;
}

.footer {
  margin-top: 24px;
  text-align: center;
  color: #475569;
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .page-shell {
    padding: 12px;
  }

  .search-row {
    grid-template-columns: 1fr;
  }

  .search-row button {
    width: 100%;
  }
}