:root{
  --kb-header-h: 44px;
  --kb-border: #e6e6e6;
  --kb-bg: #f7f7f9;
  --kb-muted: #666;
  --kb-link: #0b3d91;
  --kb-locked: #999;
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color:#111;
}

.kb-header{
  height: var(--kb-header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:0 14px;
  background:#0b3d91;
  color:#fff;
}
.kb-header a{ color:#fff; text-decoration:none; }
.kb-header .kb-user{
  display:flex;
  gap:10px;
  align-items:center;
  font-size: 14px;
}
.kb-header form{ margin:0; }
.kb-header button{
  border:1px solid rgba(255,255,255,.35);
  background:transparent;
  color:#fff;
  padding:6px 10px;
  border-radius:6px;
  cursor:pointer;
}

.kb-shell{
  height: calc(100vh - var(--kb-header-h));
  display:grid;
  grid-template-columns: 280px minmax(0, 1fr) 280px;
}

.kb-tree, .kb-toc{
  border-right:1px solid var(--kb-border);
  background: var(--kb-bg);
  overflow:auto;
}
.kb-toc{
  border-right:0;
  border-left:1px solid var(--kb-border);
}
.kb-pane-title{
  padding:10px 12px;
  font-weight:600;
  border-bottom:1px solid var(--kb-border);
  background:#fff;
}

.kb-tree-hint{
  display:none;
  padding: 8px 12px;
  border-bottom:1px solid var(--kb-border);
  background:#fff;
  color: var(--kb-muted);
  font-size: 12px;
  line-height: 1.35;
}
.kb-tree-hint.is-visible{ display:block; }

.kb-content{
  overflow:auto;
  padding: 14px 18px 40px;
}

.kb-breadcrumb{
  font-size: 13px;
  color: var(--kb-muted);
  margin: 2px 0 10px;
}
.kb-breadcrumb a{ color: var(--kb-link); text-decoration:none; }
.kb-breadcrumb a:hover{ text-decoration:underline; }

.kb-meta{
  color: var(--kb-muted);
  font-size: 13px;
  margin: 8px 0 14px;
}
.kb-actions{
  display:flex;
  gap:10px;
  margin: 10px 0 14px;
}
.kb-actions a, .kb-actions button{
  display:inline-block;
  border:1px solid var(--kb-border);
  background:#fff;
  padding:7px 10px;
  border-radius:6px;
  text-decoration:none;
  color:#111;
  font-size:14px;
}
.kb-actions button{ cursor:pointer; }

.kb-form{
  max-width: 920px;
}
.kb-form .kb-field{
  margin: 10px 0;
}
.kb-form label{
  font-size: 14px;
}
.kb-form input[type="text"],
.kb-form input[type="email"],
.kb-form textarea,
.kb-form select{
  width: min(720px, 100%);
  padding: 8px;
  border: 1px solid var(--kb-border);
  border-radius: 6px;
  background: #fff;
}
.kb-form textarea{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

.kb-alert{
  border:1px solid var(--kb-border);
  background:#fff;
  border-radius:8px;
  padding:10px 12px;
  margin: 10px 0 16px;
}
.kb-alert.error{ border-color:#f2b8b5; background:#fff5f5; }
.kb-alert.ok{ border-color:#b7eb8f; background:#f6ffed; }

.kb-table{
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--kb-border);
  border-radius: 10px;
  overflow: hidden;
}
.kb-table th,
.kb-table td{
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--kb-border);
  font-size: 14px;
  vertical-align: top;
}
.kb-table th{
  background: #fafafa;
  font-weight: 600;
}
.kb-table tr:last-child td{ border-bottom: 0; }
.kb-badge{
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 12px;
  border: 1px solid var(--kb-border);
  background: #fff;
}
.kb-badge.ok{ border-color:#b7eb8f; background:#f6ffed; }
.kb-badge.warn{ border-color:#ffe58f; background:#fffbe6; }

.kb-tree ul{
  list-style:none;
  padding-left: 14px;
  margin: 8px 0;
}
.kb-tree li{ margin: 2px 0; }
.kb-tree .kb-node{
  position: relative;
  display:flex;
  align-items:center;
  gap:6px;
  padding: 3px 6px;
  border-radius:6px;
}
.kb-tree .kb-node:hover{ background: rgba(0,0,0,.04); }
.kb-tree .kb-drag-handle{
  width: 14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size: 14px;
  line-height: 1;
  color: rgba(0,0,0,.45);
  cursor: grab;
  user-select:none;
}
.kb-tree .kb-drag-handle:active{ cursor: grabbing; }
.kb-tree .kb-drop-target{
  outline: 2px dashed rgba(11, 61, 145, 0.35);
  outline-offset: 2px;
}
.kb-tree .kb-node.kb-drop-before{
  background: rgba(11, 61, 145, 0.06);
}
.kb-tree .kb-node.kb-drop-before::before{
  content:"";
  position:absolute;
  left: 0;
  right: 0;
  top: -1px;
  border-top: 3px solid rgba(11, 61, 145, 0.55);
}
.kb-tree #kb-tree.kb-drop-root{
  outline: 2px dashed rgba(11, 61, 145, 0.35);
  outline-offset: 2px;
}
.kb-tree .kb-expander{
  width: 16px;
  height: 16px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid rgba(0,0,0,.1);
  border-radius:4px;
  background:#fff;
  cursor:pointer;
  font-size: 12px;
  line-height: 1;
}
.kb-tree .kb-expander[aria-expanded="false"]::before{ content:"+"; }
.kb-tree .kb-expander[aria-expanded="true"]::before{ content:"–"; }
.kb-tree .kb-expander.kb-empty{
  visibility:hidden;
}
.kb-tree a{
  color:#111;
  text-decoration:none;
  font-size: 14px;
}
.kb-tree a:hover{ text-decoration:underline; }
.kb-locked a{
  color: var(--kb-locked);
  pointer-events:none;
}
.kb-locked .kb-lock-label{
  font-size: 12px;
  color: var(--kb-locked);
  margin-left: 6px;
}

.kb-toc .kb-toc-inner{
  padding: 8px 12px 16px;
}
.kb-toc .kb-toc-inner h3{
  margin: 10px 0 8px;
  font-size: 14px;
}
.kb-toc .kb-toc-list{
  margin:0;
  padding-left: 18px;
  font-size: 13px;
}
.kb-toc .kb-toc-list li{ margin: 4px 0; }
.kb-toc a{ color: var(--kb-link); text-decoration:none; }
.kb-toc a:hover{ text-decoration:underline; }

/* Article content basics */
.kb-article-content{
  line-height: 1.55;
}
.kb-article-content pre{
  background:#0b1020;
  color:#e6e6e6;
  padding: 10px 12px;
  overflow:auto;
  border-radius:8px;
}
.kb-article-content code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

@media (max-width: 1100px){
  .kb-shell{ grid-template-columns: 280px minmax(0, 1fr); }
  .kb-toc{ display:none; }
}
@media (max-width: 820px){
  .kb-shell{ grid-template-columns: minmax(0, 1fr); }
  .kb-tree{ display:none; }
}