/**
 * Knowledge Board
 *
 * Fresh .kb-* namespace; no !important needed. Glass surfaces reuse the named
 * primitives from variables.css rather than re-typing the four-layer stack that
 * org-search.css and zoom-controls.css each carry a copy of.
 */

/* ========================================
   LAYOUT
   ======================================== */

.kb-board {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.kb-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--spacing-6);
  align-items: start;
}

.kb-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-8);
  min-width: 0;
}

/* ========================================
   TOOLBAR & SEARCH
   ======================================== */

.kb-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-4);
  flex-wrap: wrap;
}

.kb-toolbar-actions {
  display: flex;
  gap: var(--spacing-2);
}

.kb-search {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex: 1;
  min-width: 240px;
  max-width: 420px;
  padding: 0 var(--spacing-3);
  min-height: var(--spacing-11);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
  transition: box-shadow var(--duration-150) var(--ease-in-out),
    border-color var(--duration-150) var(--ease-in-out);
}

/* The panel reacts, not the bare input — same as OrgSearch. */
.kb-search:focus-within {
  border-color: rgba(var(--color-primary-rgb), 0.25);
  box-shadow: var(--shadow-glass), var(--glow-focus);
}

.kb-search-icon {
  display: inline-flex;
  color: var(--color-slate-400);
  flex-shrink: 0;
}

.kb-search:focus-within .kb-search-icon {
  color: var(--color-primary);
}

.kb-search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-900);
  min-width: 0;
}

.kb-search-input::placeholder {
  color: var(--color-slate-400);
}

.kb-search-clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-6);
  height: var(--spacing-6);
  border: none;
  border-radius: var(--radius-full);
  background: var(--color-slate-100);
  color: var(--color-slate-500);
  cursor: pointer;
  flex-shrink: 0;
}

/* An explicit display value outranks the `display: none` the hidden attribute
   gets from the UA stylesheet, so it has to be restated per element. */
.kb-search-clear[hidden] {
  display: none;
}

.kb-search-clear:hover {
  background: var(--color-slate-200);
  color: var(--color-slate-800);
}

.kb-search-clear:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* ========================================
   LINK TREE
   ======================================== */

.kb-tree {
  position: sticky;
  top: var(--spacing-4);
  padding: var(--spacing-4);
  border-radius: var(--radius-lg);
  background: var(--glass-bg);
  border: var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--shadow-glass);
}

.kb-tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-2);
  margin-bottom: var(--spacing-3);
  padding-bottom: var(--spacing-3);
  border-bottom: 1px solid var(--color-slate-200);
}

.kb-tree-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.kb-tree-add {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-8);
  height: var(--spacing-8);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-primary);
  cursor: pointer;
  transition: var(--transition-colors);
}

.kb-tree-add:hover {
  background: var(--color-slate-100);
}

.kb-tree-add:focus-visible,
.kb-tree-toggle:focus-visible,
.kb-tree-action:focus-visible,
.kb-tree-link:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.kb-tree-list,
.kb-tree-children {
  list-style: none;
  margin: 0;
  padding: 0;
}

.kb-tree-children {
  margin-left: var(--spacing-4);
  padding-left: var(--spacing-3);
  border-left: 1px solid var(--color-slate-200);
}

.kb-tree-row {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  min-height: var(--spacing-9);
}

.kb-tree-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-6);
  height: var(--spacing-6);
  flex-shrink: 0;
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-slate-500);
  cursor: pointer;
}

.kb-tree-toggle:hover {
  background: var(--color-slate-100);
  color: var(--color-primary);
}

.kb-tree-toggle-spacer {
  width: var(--spacing-6);
  flex-shrink: 0;
}

.kb-tree-label,
.kb-tree-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  flex: 1;
  min-width: 0;
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-800);
}

.kb-tree-label {
  font-weight: var(--font-weight-semibold);
}

.kb-tree-link {
  color: var(--color-secondary);
  text-decoration: none;
  border-radius: var(--radius-sm);
  padding: var(--spacing-1) var(--spacing-1);
}

.kb-tree-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.kb-tree-actions {
  display: flex;
  gap: var(--spacing-0-5);
  opacity: 0;
  transition: opacity var(--duration-150) var(--ease-in-out);
}

.kb-tree-row:hover .kb-tree-actions,
.kb-tree-actions:focus-within {
  opacity: 1;
}

.kb-tree-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-6);
  height: var(--spacing-6);
  border: none;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-slate-500);
  cursor: pointer;
}

.kb-tree-action:hover:not(:disabled) {
  background: var(--color-slate-100);
  color: var(--color-primary);
}

.kb-tree-action:disabled {
  opacity: 0.3;
  cursor: default;
}

.kb-tree-action-danger:hover:not(:disabled) {
  background: var(--color-error-light);
  color: var(--color-error-dark);
}

.kb-tree-empty {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-text-muted);
}

/* ========================================
   CATEGORY SECTIONS
   ======================================== */

.kb-category {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-4);
  animation: kbSectionEntrance var(--duration-500) var(--ease-expo-out) backwards;
}

@keyframes kbSectionEntrance {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.kb-category-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-3);
  padding-bottom: var(--spacing-2);
  border-bottom: 1px solid var(--color-slate-200);
}

.kb-category-heading {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  color: var(--color-primary);
}

.kb-category-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
}

.kb-category-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--spacing-5);
  height: var(--spacing-5);
  padding: 0 var(--spacing-1-5);
  border-radius: var(--radius-full);
  background: var(--color-slate-100);
  color: var(--color-slate-500);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-semibold);
  font-variant-numeric: tabular-nums;
}

.kb-category-actions {
  display: flex;
  gap: var(--spacing-1);
}

.kb-category-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-8);
  height: var(--spacing-8);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-slate-500);
  cursor: pointer;
  transition: var(--transition-colors);
}

.kb-category-action:hover {
  background: var(--color-slate-100);
  color: var(--color-primary);
}

.kb-category-action-danger:hover {
  background: var(--color-error-light);
  color: var(--color-error-dark);
}

.kb-category-action:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.kb-category-empty {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-text-muted);
}

/* ========================================
   ENTRY CARDS
   ======================================== */

.kb-entries {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-4);
}

.kb-entry {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-3);
  padding: var(--spacing-5);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-card);
  transition:
    transform var(--duration-200) var(--ease-back-out),
    box-shadow var(--duration-200) var(--ease-in-out);
}

.kb-entry:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
}

.kb-entry-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--spacing-3);
}

.kb-entry-heading {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
  min-width: 0;
}

.kb-entry-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: var(--line-height-snug);
}

.kb-entry-partner {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wider);
  text-transform: uppercase;
  color: var(--color-slate-text-muted);
}

.kb-entry-contact {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-xs);
  color: var(--color-slate-text-muted);
}

.kb-entry-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-2);
  flex-shrink: 0;
}

.kb-entry-inactive {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  color: var(--color-slate-500);
}

.kb-entry-description {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-600);
  line-height: var(--line-height-relaxed);
  /* Authors type plain text with line breaks; keep them without any markup. */
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.kb-entry-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.kb-entry-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-2);
  min-height: var(--spacing-8);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-secondary);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.kb-entry-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.kb-entry-link:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.kb-entry-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-1);
}

.kb-tag {
  padding: var(--spacing-0-5) var(--spacing-2);
  border-radius: var(--radius-full);
  background: var(--color-slate-100);
  color: var(--color-slate-600);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-medium);
}

.kb-entry-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-1);
  padding-top: var(--spacing-3);
  border-top: 1px solid var(--color-slate-100);
}

.kb-entry-action {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  min-height: var(--spacing-8);
  padding: 0 var(--spacing-2);
  border: none;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-slate-500);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: var(--transition-colors);
}

.kb-entry-action:hover {
  background: var(--color-slate-100);
  color: var(--color-primary);
}

.kb-entry-action:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.kb-entry-action-confirm {
  color: var(--color-success-dark);
}

.kb-entry-action-confirm:hover {
  background: var(--color-success-light);
  color: var(--color-success-dark);
}

.kb-entry-action-danger:hover {
  background: var(--color-error-light);
  color: var(--color-error-dark);
}

/* ========================================
   FRESHNESS BADGE
   ======================================== */

.kb-freshness {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-1);
  padding: var(--spacing-0-5) var(--spacing-2);
  border-radius: var(--radius-full);
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-2xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--letter-spacing-wide);
  white-space: nowrap;
}

/* Each state pairs a colour with an icon and a word: colour never carries the
   meaning alone. */
.kb-freshness-current {
  background: var(--color-success-light);
  color: var(--color-success-dark);
}

.kb-freshness-due {
  background: var(--color-warning-light);
  color: var(--color-warning-dark);
}

.kb-freshness-stale {
  background: var(--color-error-light);
  color: var(--color-error-dark);
}

/* ========================================
   EDITORS
   ======================================== */

.kb-editor {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-5);
}

.kb-link-rows {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.kb-link-row {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-1);
}

.kb-link-row-fields {
  display: grid;
  grid-template-columns: 1fr 1.4fr auto auto;
  gap: var(--spacing-2);
  align-items: center;
}

.kb-link-remove {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-8);
  height: var(--spacing-8);
  border: 1px solid var(--color-slate-200);
  border-radius: var(--radius-md);
  background: var(--color-white);
  color: var(--color-slate-500);
  cursor: pointer;
}

.kb-link-remove:hover {
  background: var(--color-error-light);
  border-color: var(--color-error-light);
  color: var(--color-error-dark);
}

.kb-link-remove:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

.kb-link-error {
  display: block;
}

.kb-link-error[hidden] {
  display: none;
}

.kb-link-add {
  margin-top: var(--spacing-2);
}

/* ========================================
   STATES
   ======================================== */

.kb-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--spacing-3);
  padding: var(--spacing-12) var(--spacing-6);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-slate-200);
  box-shadow: var(--shadow-card);
}

.kb-state-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--spacing-14);
  height: var(--spacing-14);
  border-radius: var(--radius-full);
  background: var(--color-slate-100);
  color: var(--color-slate-500);
}

.kb-state-title {
  font-family: var(--font-family-primary);
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

.kb-state-message {
  font-family: var(--font-family-secondary);
  font-size: var(--font-size-sm);
  color: var(--color-slate-text-muted);
  max-width: var(--narrow-max-width);
  line-height: var(--line-height-relaxed);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .kb-body {
    grid-template-columns: 1fr;
  }

  .kb-tree {
    position: static;
  }
}

@media (max-width: 768px) {
  .kb-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .kb-search {
    max-width: none;
  }

  .kb-entries {
    grid-template-columns: 1fr;
  }

  .kb-link-row-fields {
    grid-template-columns: 1fr auto;
  }

  /* Actions are permanently visible without hover. */
  .kb-tree-actions {
    opacity: 1;
  }
}

@media (hover: none) {
  .kb-tree-actions {
    opacity: 1;
  }

  .kb-entry:hover {
    transform: none;
  }
}