.kb-shell { max-width: 1440px; margin: 0 auto; padding: 28px; }
.kb-header, .kb-editor-heading { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.kb-header nav { display: flex; gap: 20px; flex-wrap: wrap; }
.kb-header a { color: var(--accent); }
.kb-header h1 { margin-bottom: 14px; }
.kb-header .brand { letter-spacing: 0; }
.kb-sections { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; border-bottom: 1px solid var(--line); }
.kb-section { display: flex; align-items: center; justify-content: center; gap: 10px; min-height: 48px; max-width: 100%; padding: 12px 16px; border-radius: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); overflow-wrap: anywhere; }
.kb-section:hover { background: var(--hover); color: var(--text); }
.kb-section[aria-selected="true"] { border-bottom-color: var(--accent); color: var(--text); background: var(--panel); }
.kb-section small { color: var(--muted); font-size: 12px; font-weight: 400; font-variant-numeric: tabular-nums; min-width: 3ch; }
.kb-toolbar { display: grid; grid-template-columns: minmax(160px, 1fr) 180px auto; gap: 12px; align-items: end; padding: 20px 0; border-bottom: 1px solid var(--line); }
.kb-layout { display: grid; grid-template-columns: minmax(0, 1fr); gap: 28px; padding-top: 20px; }
.kb-layout:has(.kb-editor:not([hidden])) { grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr); }
.kb-entries { list-style: none; margin: 12px 0; padding: 0; }
.kb-entries li { border-bottom: 1px solid var(--line); }
.kb-entry { width: 100%; text-align: left; border-radius: 0; background: transparent; color: var(--text); padding: 14px 8px; overflow-wrap: anywhere; }
.kb-entry:hover, .kb-entry[aria-current="true"] { background: var(--hover); }
.kb-entry small { display: block; color: var(--muted); font-weight: 400; margin-top: 5px; }
.kb-editor { border-left: 1px solid var(--line); padding-left: 28px; align-content: start; }
.kb-editor-heading h2 { margin: 0; font-size: 20px; overflow-wrap: anywhere; }
.kb-editor-heading button { width: 40px; height: 40px; padding: 0; font-size: 22px; flex-shrink: 0; }
.kb-fields { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.kb-results, .kb-editor, .kb-toolbar label { min-width: 0; }
.kb-editor textarea { max-width: 100%; }
.kb-editor .actions { flex-wrap: wrap; }
[hidden] { display: none !important; }
@media (max-width: 820px) {
  .kb-shell { padding: 16px; }
  .kb-header { align-items: flex-start; flex-direction: column; }
  .kb-toolbar { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .kb-toolbar label:first-child { grid-column: 1 / -1; }
  .kb-toolbar > .actions { grid-column: 1 / -1; justify-content: flex-end; }
  .kb-layout:has(.kb-editor:not([hidden])) { grid-template-columns: minmax(0, 1fr); }
  .kb-layout:has(.kb-editor:not([hidden])) .kb-results { display: none; }
  .kb-editor { padding-left: 0; border-left: 0; }
}