.structure-manager{padding:24px}.structure-manager>header p,.structure-path,.structure-notice{color:var(--muted);font-size:12px;line-height:1.7;margin:10px 0 18px}.structure-tools{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:22px 0 8px}.structure-tools>input{flex:1;min-width:180px}.structure-tools>label{display:flex;align-items:center;gap:7px;font-size:12px}.structure-status{font-size:12px;line-height:1.6;min-height:28px;color:var(--accent);overflow-wrap:anywhere}.structure-manager-grid{display:grid;grid-template-columns:minmax(240px,1fr) minmax(0,2fr);gap:24px;align-items:start}.structure-tree-panel{border:1px solid var(--line);border-radius:5px;padding:12px;max-height:75vh;overflow:auto}.structure-tree-panel>summary{padding:6px;font-size:13px;font-weight:600;cursor:pointer}.structure-tree-panel details details{margin-top:4px}.structure-tree-panel summary{cursor:pointer}.structure-node{display:inline-flex;flex-direction:column;align-items:flex-start;text-align:left;max-width:calc(100% - 22px);border:0;background:none;padding:9px 8px;font-size:12px;overflow-wrap:anywhere;vertical-align:middle}.structure-node.active{color:var(--accent);background:var(--bg);box-shadow:inset 2px 0 var(--accent)}.structure-node small{font-size:10px;color:var(--muted);margin-top:4px}.structure-unit-nodes{padding-left:14px;border-left:1px solid var(--line);margin-left:8px}.structure-equipment-nodes{padding-left:18px;display:grid}.structure-card{min-width:0}.structure-path{overflow-wrap:anywhere}.structure-form fieldset{padding:16px 0 4px}.structure-form label{margin-bottom:14px}.structure-form fieldset:disabled{opacity:.7}.structure-card-actions{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0}.structure-card-actions button{font-size:12px}.structure-form-message{font-size:12px;line-height:1.6}.structure-history,.structure-related{border-top:1px solid var(--line);padding-top:20px;margin-top:22px}.structure-related button{display:block;width:100%;text-align:left;margin-top:8px;overflow-wrap:anywhere}.structure-related small{display:block;color:var(--muted);font-size:11px;margin-top:6px}.structure-history article{border-bottom:1px solid var(--line);padding:14px 0;overflow-wrap:anywhere}.structure-history strong{font-size:12px}.structure-history small{display:block;color:var(--muted);font-size:11px;margin:6px 0}.structure-history p,.structure-related>p{font-size:12px;color:var(--muted);line-height:1.6;margin-top:8px}@media(max-width:1000px){.structure-manager-grid{grid-template-columns:1fr}.structure-tree-panel{max-height:40vh}}@media(max-width:520px){.structure-manager{padding:16px}.structure-tools>input{width:100%;flex-basis:100%}.structure-tools>button{flex:1}.structure-card-actions>button{flex:1;min-width:130px}}

/* Structure navigation follows the same fine lines as the main sidebar. */
.structure-tree-panel{
  padding:0;border:1px solid var(--line);border-radius:4px;
  background:transparent;scrollbar-width:thin;scrollbar-color:var(--line) transparent;
}
.structure-tree-panel summary{list-style:none;display:flex;align-items:center;gap:9px;min-width:0}
.structure-tree-panel summary::-webkit-details-marker{display:none}
.structure-tree-panel summary::marker{content:""}
.structure-tree-panel summary::before{
  content:"";display:block;flex:0 0 5px;width:5px;height:5px;
  border-right:1px solid var(--muted);border-bottom:1px solid var(--muted);
  transform:rotate(-45deg);transition:transform .15s ease;margin:0 3px 0 2px;
}
.structure-tree-panel details[open]>summary::before,
.structure-tree-panel[open]>summary::before{transform:rotate(45deg)}
.structure-tree-panel>summary{
  min-height:42px;padding:12px 15px;font-size:10px;font-weight:500;
  letter-spacing:1.1px;text-transform:uppercase;color:var(--muted);
}
.structure-tree-panel[open]>summary{border-bottom:1px solid var(--line)}
.structure-tree-panel [data-structure-tree]{padding:10px 12px 14px}
.structure-tree-panel details details{margin-top:2px}
.structure-tree-panel summary:focus-visible{outline:1px solid var(--accent);outline-offset:-2px}
.structure-unit-nodes{padding-left:12px;margin-left:5px;border-left:1px solid var(--line)}
.structure-equipment-nodes{padding-left:12px;margin-left:5px;border-left:1px solid var(--line);gap:2px}
.structure-node{
  display:grid;grid-template-columns:14px minmax(0,1fr);column-gap:8px;row-gap:3px;
  align-items:center;width:100%;max-width:none;min-width:0;min-height:36px;
  padding:8px 9px;margin:1px 0;border:1px solid transparent;border-radius:3px;
  font-size:12px;font-weight:400;line-height:1.5;text-align:left;
  background:transparent;color:var(--text);box-shadow:none;
}
.structure-node::before{
  content:"";grid-column:1;grid-row:1;justify-self:center;
  width:10px;height:10px;border:1px solid var(--muted);border-radius:1px;
}
.structure-node[data-node-type="site"]::before{width:9px;height:12px;border-top:3px double var(--muted)}
.structure-node[data-node-type="unit"]::before{width:12px;height:9px;border-radius:1px 3px 1px 1px}
.structure-node[data-node-type="equipment"]::before{width:11px;height:8px;border-bottom:3px double var(--muted)}
.structure-node>span,.structure-node>small{grid-column:2;min-width:0;overflow-wrap:anywhere}
.structure-node small{margin:0;font-size:10px;line-height:1.4;color:var(--muted)}
.structure-node:hover{background:rgba(153,161,178,.055);border-color:var(--line)}
.structure-node.active{
  color:var(--accent);background:rgba(100,203,212,.055);
  border:1px solid rgba(100,203,212,.28);box-shadow:none;
}
.structure-node.active::before{border-color:var(--accent)}
.structure-node:focus-visible{outline:1px solid var(--accent);outline-offset:1px}
.structure-tree-panel summary>.structure-node{flex:1}
.structure-tree-panel .empty{padding:16px 8px;font-size:12px}
.structure-card-actions button{border-radius:3px}
@media(max-width:520px){
  .structure-tree-panel [data-structure-tree]{padding:8px}
  .structure-unit-nodes,.structure-equipment-nodes{padding-left:8px}
  .structure-node{min-height:40px;padding:9px 7px;column-gap:6px}
}
@media(prefers-reduced-motion:reduce){.structure-tree-panel summary::before{transition:none}}