/* GRID Knowledge Base — Learn-style documentation portal */

.kb-root {
  --brand: #3c64a6;
  --brand-dark: #24457a;
  --accent: #f4b038;
  --panel: #fefeff;
  --panel2: #f5f8fc;
  --line: #e4eaf3;
  --ink: #152238;
  --muted: #5b6b82;
  --radius: 12px;
  font-family: 'Source Sans 3', system-ui, sans-serif;
  color: var(--ink);
}

.kb-root .kb-portal {
  display: grid;
  grid-template-columns: minmax(260px, 300px) minmax(0, 1fr);
  gap: 0;
  min-height: min(70vh, 820px);
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #fff;
  overflow: hidden;
}

.kb-root .kb-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 14px 12px 16px;
  border-right: 1px solid var(--line);
  background: #f7f9fc;
  min-height: 0;
}

.kb-root .kb-find {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.kb-root .kb-find:focus-within {
  border-color: #9bb4d8;
  box-shadow: 0 0 0 3px rgba(60, 100, 166, 0.14);
}

.kb-root .kb-find-ico {
  display: inline-flex;
  color: var(--muted);
  flex-shrink: 0;
}

.kb-root .kb-find-ico svg {
  width: 16px;
  height: 16px;
}

.kb-root .kb-find input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: none;
  background: transparent;
  font: inherit;
  font-size: 14px;
  color: var(--ink);
}

.kb-root .kb-libs {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-root .kb-lib {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--brand-dark);
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.kb-root .kb-lib:hover {
  background: #eef3fa;
}

.kb-root .kb-lib.is-active {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.kb-root .kb-tree {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding-right: 4px;
}

.kb-root .kb-tree-lib {
  margin-bottom: 14px;
}

.kb-root .kb-tree-lib-label {
  margin: 0 0 6px 4px;
  font-size: 11px;
  font-weight: 750;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--muted);
}

.kb-root .kb-tree-empty {
  margin: 12px 8px;
  color: var(--muted);
  font-size: 13px;
}

.kb-root .kb-tree-folder,
.kb-root .kb-tree-doc {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  border: 0;
  background: transparent;
  text-align: left;
  cursor: pointer;
  border-radius: 8px;
  padding: 7px 8px 7px calc(8px + (var(--depth, 0) * 14px));
  color: var(--ink);
  font: inherit;
}

.kb-root .kb-tree-folder:hover,
.kb-root .kb-tree-doc:hover {
  background: rgba(60, 100, 166, 0.08);
}

.kb-root .kb-tree-folder.is-active,
.kb-root .kb-tree-doc.is-active {
  background: rgba(60, 100, 166, 0.14);
  color: var(--brand-dark);
  font-weight: 700;
}

.kb-root .kb-tree-chev {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #7a8aa0;
  transition: transform 0.15s ease, color 0.15s ease;
}

.kb-root .kb-tree-chev svg {
  display: block;
}

.kb-root .kb-tree-folder:hover .kb-tree-chev {
  color: var(--brand);
}

.kb-root .kb-tree-folder.is-open .kb-tree-chev {
  transform: rotate(90deg);
  color: var(--brand-dark);
}

.kb-root .kb-tree-label {
  flex: 1;
  min-width: 0;
  font-size: 13.5px;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.kb-root .kb-tree-count {
  flex-shrink: 0;
  font-size: 11px;
  font-weight: 750;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 1px 7px;
}

.kb-root .kb-tree-doc-ico {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: #c5d2e4;
  flex-shrink: 0;
  margin-left: 3px;
}

.kb-root .kb-tree-doc.is-active .kb-tree-doc-ico {
  background: var(--brand);
}

.kb-root .kb-tree-children {
  display: none;
}

.kb-root .kb-tree-children.is-open {
  display: block;
}

.kb-root .kb-pane {
  min-width: 0;
  padding: 20px 24px 28px;
  background: var(--panel);
}

.kb-root .kb-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
  font-size: 13px;
  color: var(--muted);
}

.kb-root .kb-crumb button {
  border: 0;
  background: transparent;
  color: var(--brand);
  font: inherit;
  font-weight: 650;
  cursor: pointer;
  padding: 0;
}

.kb-root .kb-crumb button:hover {
  text-decoration: underline;
}

.kb-root .kb-crumb span {
  color: var(--ink);
  font-weight: 650;
}

.kb-root .kb-crumb-sep {
  color: #b0bdcf;
  font-weight: 500;
}

.kb-root .kb-pane-head {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.kb-root .kb-pane-title {
  margin: 0 0 6px;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--brand-dark);
  line-height: 1.2;
}

.kb-root .kb-pane-lede {
  margin: 0;
  max-width: 62ch;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.5;
}

.kb-root .kb-pane-meta {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.kb-root .kb-row-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kb-root .kb-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.kb-root .kb-row:hover,
.kb-root .kb-row.is-active {
  border-color: #b7c7de;
  background: var(--panel2);
}

.kb-root .kb-row-main {
  min-width: 0;
  flex: 1;
}

.kb-root .kb-row-title {
  margin: 0 0 4px;
  font-size: 15.5px;
  font-weight: 750;
  color: var(--brand-dark);
  line-height: 1.3;
}

.kb-root .kb-row-summary {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-root .kb-row-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 8px;
  font-size: 12.5px;
  color: #7a8aa0;
}

.kb-root .kb-row-lib {
  font-weight: 750;
  color: var(--brand);
}

.kb-root .kb-open {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 9px;
  border: 1px solid #e0a22e;
  background: var(--accent);
  color: #1d3a66;
  text-decoration: none;
  font-size: 13px;
  font-weight: 750;
}

.kb-root .kb-open:hover {
  filter: brightness(0.98);
}

.kb-root .kb-open-lg {
  padding: 10px 16px;
  font-size: 14px;
}

.kb-root .kb-detail-actions {
  margin-bottom: 14px;
}

.kb-root .kb-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-root .kb-tag {
  font-size: 12px;
  font-weight: 650;
  color: var(--brand-dark);
  background: #edf2f9;
  border: 1px solid #d7e2f0;
  border-radius: 999px;
  padding: 3px 9px;
}

.kb-root .kb-related {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.kb-root .kb-related h3 {
  margin: 0 0 10px;
  font-family: 'DM Sans', system-ui, sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--brand-dark);
}

.kb-root .kb-related-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.kb-root .kb-related-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  width: 100%;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 10px 12px;
  cursor: pointer;
  text-align: left;
  font: inherit;
}

.kb-root .kb-related-item:hover {
  background: var(--panel2);
  border-color: #b7c7de;
}

.kb-root .kb-related-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
}

.kb-root .kb-related-path {
  font-size: 12px;
  color: var(--muted);
}

.kb-root .kb-empty {
  border: 1px dashed #c9d4e4;
  border-radius: 12px;
  text-align: center;
  padding: 36px 20px;
}

.kb-root .kb-empty .big {
  font-family: 'DM Sans', system-ui, sans-serif;
  font-weight: 700;
  font-size: 17px;
  color: var(--brand);
}

.kb-root .kb-empty .small {
  color: var(--muted);
  font-size: 13px;
  margin-top: 6px;
}

@media (max-width: 900px) {
  .kb-root .kb-portal {
    grid-template-columns: 1fr;
    min-height: 0;
  }

  .kb-root .kb-nav {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    max-height: 42vh;
  }

  .kb-root .kb-pane {
    padding: 16px;
  }
}