/* =============================================================
   Client Portal KB v2
   Lives inside the existing .admin-main area and flows naturally
   like any other portal panel — no nested frame / sidebar.
   Categories, bookmarks, recent are rendered as inline sections
   of the home view instead of a persistent side rail.
   ============================================================= */

/* ── Header (title + big search trigger) ──────────────────── */
.ckb-header {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-bottom: var(--sp-5);
  flex-wrap: wrap;
}
.ckb-header h2 {
  margin: 0;
  flex: 0 0 auto;
}

.ckb-search-trigger {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex: 1;
  min-width: 260px;
  padding: 12px 16px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ckb-search-trigger:hover {
  border-color: var(--border-hover);
  background: rgba(0, 212, 255, 0.04);
}
.ckb-search-trigger svg { width: 18px; height: 18px; opacity: 0.6; flex-shrink: 0; }
.ckb-search-trigger-text { flex: 1; text-align: left; }
.ckb-kbd {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  background: var(--dark-4);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
}

/* ── Body + TOC layout ────────────────────────────────────── */
.ckb-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: var(--sp-6);
  align-items: start;
}
.ckb-main { min-width: 0; }

/* Breadcrumbs */
.ckb-crumb {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
  font-size: 13px;
  color: var(--text-dimmer);
  margin-bottom: var(--sp-4);
}
.ckb-crumb a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
.ckb-crumb a:hover { color: var(--cyan); }
.ckb-crumb-sep { opacity: 0.4; }

/* ── Section headers ─────────────────────────────────────── */
.ckb-section-title {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dimmer);
  margin: var(--sp-6) 0 var(--sp-3);
}

/* ── Category pill row (home view) ───────────────────────── */
.ckb-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-bottom: var(--sp-5);
}
.ckb-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  color: var(--text);
  font-size: 13px;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ckb-pill:hover {
  border-color: var(--border-hover);
  color: var(--cyan);
  background: rgba(0, 212, 255, 0.04);
}
.ckb-pill-count {
  font-size: 11px;
  color: var(--text-dimmer);
  background: var(--dark-4);
  padding: 1px 7px;
  border-radius: 10px;
  min-width: 22px;
  text-align: center;
}

/* ── Category cards (home view) ──────────────────────────── */
.ckb-cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: var(--sp-3);
}
.ckb-cat-card {
  padding: var(--sp-4);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ckb-cat-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  background: rgba(0, 212, 255, 0.03);
}
.ckb-cat-card-icon { font-size: 24px; margin-bottom: var(--sp-2); }
.ckb-cat-card h3 { font-size: 15px; font-weight: 600; color: var(--text); margin: 0 0 4px; }
.ckb-cat-card p { font-size: 12px; color: var(--text-dim); line-height: 1.45; margin: 0 0 var(--sp-2); }
.ckb-cat-card-count { font-size: 11px; color: var(--cyan); font-weight: 600; }

/* ── Article rows (filtered lists, bookmarks, recent) ────── */
.ckb-article-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.ckb-article-row {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: 12px var(--sp-4);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.ckb-article-row:hover {
  background: var(--glass);
  border-color: var(--glass-border);
}
.ckb-article-row-body { flex: 1; min-width: 0; }
.ckb-article-row-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 3px;
}
.ckb-article-row-meta {
  font-size: 12px;
  color: var(--text-dimmer);
}
.ckb-article-row-meta > span + span::before {
  content: '·';
  margin: 0 var(--sp-2);
  opacity: 0.5;
}
.ckb-article-row-pin { color: var(--amber); font-size: 12px; }
.ckb-article-row-arrow {
  color: var(--text-dimmer);
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}
.ckb-article-row:hover .ckb-article-row-arrow {
  opacity: 1;
  transform: translateX(3px);
  color: var(--cyan);
}

/* ── Bookmarks strip (shown on home) ─────────────────────── */
.ckb-bookmarks {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}
.ckb-bookmark-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  background: rgba(245, 158, 11, 0.06);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 13px;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ckb-bookmark-chip:hover { border-color: var(--amber); }
.ckb-bookmark-chip-star { color: var(--amber); }

/* ── Empty states ────────────────────────────────────────── */
.ckb-empty {
  text-align: center;
  padding: var(--sp-7) var(--sp-4);
  color: var(--text-dimmer);
}
.ckb-empty-icon { font-size: 36px; margin-bottom: var(--sp-3); opacity: 0.6; }
.ckb-empty h3 { color: var(--text-dim); font-weight: 500; margin-bottom: 4px; }

/* ── Article view ────────────────────────────────────────── */
.ckb-article-head { margin-bottom: var(--sp-5); }
.ckb-article-title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin-bottom: var(--sp-3);
}
.ckb-article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-2);
  font-size: 12px;
}
.ckb-article-meta-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-pill);
  font-size: 11px;
  color: var(--text-dim);
}

.ckb-article-actions {
  display: flex;
  gap: var(--sp-2);
  margin-left: auto;
}
.ckb-action-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 12px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ckb-action-btn:hover {
  border-color: var(--border-hover);
  color: var(--text);
}
.ckb-action-btn.is-active {
  color: var(--amber);
  border-color: rgba(245, 158, 11, 0.4);
  background: rgba(245, 158, 11, 0.04);
}

/* Article prose */
.ckb-article-body {
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
  max-width: 72ch;
}
.ckb-article-body h1,
.ckb-article-body h2,
.ckb-article-body h3,
.ckb-article-body h4 {
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: var(--sp-6) 0 var(--sp-3);
  scroll-margin-top: calc(var(--nav-height) + var(--sp-4));
  position: relative;
}
.ckb-article-body h2 { font-size: 22px; padding-bottom: 8px; border-bottom: 1px solid var(--glass-border); }
.ckb-article-body h3 { font-size: 17px; }
.ckb-article-body h4 { font-size: 15px; color: var(--text-dim); }
.ckb-article-body p { margin-bottom: var(--sp-3); color: var(--text-dim); }
.ckb-article-body ul,
.ckb-article-body ol { margin: 0 0 var(--sp-3) 22px; color: var(--text-dim); }
.ckb-article-body li { margin-bottom: 6px; }
.ckb-article-body a { color: var(--cyan); text-decoration: none; border-bottom: 1px solid transparent; }
.ckb-article-body a:hover { border-bottom-color: var(--cyan); }
.ckb-article-body code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--dark-3);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  padding: 1px 6px;
  color: var(--cyan);
}
.ckb-article-body pre {
  background: var(--dark-2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: var(--sp-4);
  margin: var(--sp-4) 0;
  overflow-x: auto;
  position: relative;
}
.ckb-article-body pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: var(--text);
}
.ckb-article-body blockquote {
  border-left: 3px solid var(--cyan);
  padding: var(--sp-2) var(--sp-4);
  margin: var(--sp-4) 0;
  color: var(--text-dim);
  background: rgba(0, 212, 255, 0.03);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
}
.ckb-article-body img { max-width: 100%; border-radius: var(--radius-sm); margin: var(--sp-3) 0; }
.ckb-article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--sp-4) 0;
  font-size: 14px;
}
.ckb-article-body th,
.ckb-article-body td {
  border: 1px solid var(--glass-border);
  padding: var(--sp-2) var(--sp-3);
  text-align: left;
}
.ckb-article-body th { background: var(--dark-3); color: var(--text); font-weight: 600; }

/* Anchor-on-hover for headings */
.ckb-article-body h2 .ckb-anchor,
.ckb-article-body h3 .ckb-anchor,
.ckb-article-body h4 .ckb-anchor {
  opacity: 0;
  margin-left: 8px;
  font-size: 0.7em;
  color: var(--text-dimmer);
  text-decoration: none;
  transition: opacity var(--dur-fast) var(--ease);
}
.ckb-article-body h2:hover .ckb-anchor,
.ckb-article-body h3:hover .ckb-anchor,
.ckb-article-body h4:hover .ckb-anchor { opacity: 1; }

/* Copy-code button */
.ckb-copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 4px 10px;
  background: var(--dark-4);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xs);
  color: var(--text-dim);
  font-size: 11px;
  font-family: var(--font-mono);
  cursor: pointer;
  opacity: 0;
  transition: opacity var(--dur-fast) var(--ease);
}
.ckb-article-body pre:hover .ckb-copy-btn { opacity: 1; }
.ckb-copy-btn:hover { color: var(--cyan); border-color: var(--border-hover); }

/* Feedback + related */
.ckb-footer {
  margin-top: var(--sp-7);
  padding-top: var(--sp-5);
  border-top: 1px solid var(--glass-border);
  max-width: 72ch;
}
.ckb-feedback {
  padding: var(--sp-5);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  text-align: center;
}
.ckb-feedback h4 { font-size: 15px; color: var(--text); margin-bottom: var(--sp-2); font-weight: 600; }
.ckb-feedback p { font-size: 13px; color: var(--text-dim); margin-bottom: var(--sp-4); }
.ckb-feedback-buttons { display: flex; gap: var(--sp-2); justify-content: center; flex-wrap: wrap; }
.ckb-fb-btn {
  padding: 9px 18px;
  background: var(--dark-3);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text-dim);
  font-size: 13px;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.ckb-fb-btn:hover { border-color: var(--border-hover); color: var(--text); }
.ckb-fb-btn.is-selected-up { border-color: var(--green); color: var(--green); }
.ckb-fb-btn.is-selected-down { border-color: var(--red); color: var(--red); }
.ckb-fb-comment {
  width: 100%;
  min-height: 70px;
  margin-top: var(--sp-3);
  padding: var(--sp-3);
  background: var(--dark-2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: 13px;
  resize: vertical;
}
.ckb-fb-comment:focus { outline: none; border-color: var(--cyan); }

.ckb-related { margin-top: var(--sp-6); }
.ckb-related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--sp-3);
}
.ckb-related-card {
  padding: var(--sp-3) var(--sp-4);
  background: var(--glass);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--dur-fast) var(--ease);
}
.ckb-related-card:hover { border-color: var(--border-hover); transform: translateY(-1px); }
.ckb-related-card h5 { font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 4px; }
.ckb-related-card-meta { font-size: 11px; color: var(--text-dimmer); }

/* ── TOC (right rail, article view only) ─────────────────── */
.ckb-toc {
  position: sticky;
  top: calc(var(--nav-height) + var(--sp-4));
  align-self: start;
  padding: var(--sp-3) 0 var(--sp-3) var(--sp-4);
  border-left: 1px solid var(--glass-border);
  max-height: calc(100vh - var(--nav-height) - var(--sp-6));
  overflow-y: auto;
}
.ckb-toc-title {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-dimmer);
  margin-bottom: var(--sp-3);
  padding-left: var(--sp-3);
}
.ckb-toc-list { list-style: none; padding: 0; margin: 0; }
.ckb-toc-list li { margin-bottom: 2px; }
.ckb-toc-list a {
  display: block;
  padding: 5px var(--sp-3);
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: 0 4px 4px 0;
  transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.ckb-toc-list a:hover { color: var(--text); background: var(--glass); }
.ckb-toc-list a.is-active {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: rgba(0, 212, 255, 0.04);
}
.ckb-toc-h3 a { padding-left: calc(var(--sp-3) + 14px); font-size: 11.5px; }
.ckb-toc-h4 a { padding-left: calc(var(--sp-3) + 28px); font-size: 11px; }

/* ── Command palette modal ───────────────────────────────── */
.ckb-palette-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(3, 7, 18, 0.65);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
  animation: ckbFadeIn var(--dur-fast) var(--ease);
}
[data-theme="light"] .ckb-palette-backdrop { background: rgba(15, 23, 42, 0.35); }
.ckb-palette-backdrop.is-open { display: flex; }

@keyframes ckbFadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes ckbSlideUp {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ckb-palette {
  width: min(640px, 92vw);
  max-height: 70vh;
  background: var(--dark-2);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  animation: ckbSlideUp var(--dur-fast) var(--ease);
}
.ckb-palette-search {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-4) var(--sp-5);
  border-bottom: 1px solid var(--glass-border);
}
.ckb-palette-search svg { width: 18px; height: 18px; opacity: 0.6; flex-shrink: 0; }
.ckb-palette-input {
  flex: 1;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--text);
  font-size: 16px;
  font-family: inherit;
}
.ckb-palette-input::placeholder { color: var(--text-dimmer); }
.ckb-palette-close {
  padding: 3px 8px;
  background: var(--dark-4);
  border: 1px solid var(--glass-border);
  border-radius: 4px;
  color: var(--text-dim);
  font-size: 11px;
  font-family: var(--font-mono);
  font-weight: 500;
  cursor: pointer;
}
.ckb-palette-results { flex: 1; overflow-y: auto; padding: var(--sp-2); }
.ckb-palette-hint {
  padding: var(--sp-5) var(--sp-4);
  text-align: center;
  color: var(--text-dimmer);
  font-size: 13px;
}
.ckb-palette-result {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 14px;
  border-radius: var(--radius-xs);
  border: 1px solid transparent;
  cursor: pointer;
}
.ckb-palette-result:hover,
.ckb-palette-result.is-highlighted {
  background: rgba(0, 212, 255, 0.06);
  border-color: rgba(0, 212, 255, 0.2);
}
.ckb-palette-result-title { font-size: 14px; color: var(--text); font-weight: 500; }
.ckb-palette-result-excerpt {
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.ckb-palette-result-excerpt mark {
  background: rgba(0, 212, 255, 0.2);
  color: var(--cyan);
  padding: 0 2px;
  border-radius: 2px;
}
.ckb-palette-result-meta { font-size: 10.5px; color: var(--text-dimmer); }
.ckb-palette-foot {
  display: flex;
  gap: var(--sp-4);
  justify-content: flex-end;
  padding: var(--sp-2) var(--sp-4);
  border-top: 1px solid var(--glass-border);
  font-size: 10px;
  color: var(--text-dimmer);
  background: var(--dark-3);
}
.ckb-palette-foot span { display: inline-flex; align-items: center; gap: 4px; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 960px) {
  .ckb-layout { grid-template-columns: minmax(0, 1fr); }
  .ckb-toc { display: none; }
}
@media (max-width: 640px) {
  .ckb-header { flex-direction: column; align-items: stretch; }
  .ckb-search-trigger-text { display: none; }
}