/* ═══════════════════════════════════════════════════════════════════
   /design-system/lexicon-drawer.css
   Persistent Lexicon Drawer — DS-D component
   ───────────────────────────────────────────────────────────────────
   Ships with lexicon-drawer.js. Both modes automatic via tokens.
   Loaded by every Baseforce page that wants the drawer.

   Everything here uses tokens only. No literal colors, no box-shadow
   for decoration, motion respects prefers-reduced-motion. §11 canon.
   ═══════════════════════════════════════════════════════════════════ */

.bf-lex {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
}
.bf-lex[aria-hidden="true"] { visibility: hidden; }
.bf-lex.is-open { pointer-events: auto; visibility: visible; }

/* ── Backdrop ────────────────────────────────────────────────── */
.bf-lex-backdrop {
  position: absolute; inset: 0;
  background: color-mix(in srgb, var(--text-primary) 32%, transparent);
  opacity: 0;
  transition: opacity var(--motion-medium, 280ms) var(--ease, cubic-bezier(0.2,0,0,1));
}
.bf-lex.is-open .bf-lex-backdrop { opacity: 1; }

/* ── Drawer panel ────────────────────────────────────────────── */
.bf-lex-drawer {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: min(480px, 100vw);
  background: var(--surface-page);
  border-left: 0.5px solid var(--border-rest);
  display: flex; flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--motion-medium, 280ms) var(--ease, cubic-bezier(0.2,0,0,1));
  font-family: var(--font-sans);
  color: var(--text-primary);
}
.bf-lex.is-open .bf-lex-drawer { transform: translateX(0); }

@media (prefers-reduced-motion: reduce) {
  .bf-lex-backdrop, .bf-lex-drawer { transition: none; }
}

/* ── Header ──────────────────────────────────────────────────── */
.bf-lex-header {
  padding: var(--space-5) var(--space-5) var(--space-4);
  border-bottom: 0.5px solid var(--border-rest);
  background: var(--surface-page);
}
.bf-lex-title-row {
  display: flex; align-items: center; gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.bf-lex-title {
  font-size: var(--size-heading);
  font-weight: var(--weight-medium);
  letter-spacing: var(--track-title);
  color: var(--text-primary);
  flex: 1;
}
.bf-lex-close {
  background: transparent;
  border: 0.5px solid var(--border-rest);
  border-radius: 50%;
  width: 26px; height: 26px;
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color var(--motion-short, 180ms) var(--ease),
              border-color var(--motion-short, 180ms) var(--ease);
}
.bf-lex-close:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}

/* ── Search ──────────────────────────────────────────────────── */
.bf-lex-search-row {
  display: flex; align-items: center; gap: var(--space-3);
}
.bf-lex-search {
  flex: 1;
  padding: 10px 14px;
  border: 0.5px solid var(--border-rest);
  border-radius: var(--radius-md);
  background: var(--surface-raised);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--size-body);
  letter-spacing: var(--track-body);
  transition: border-color var(--motion-short, 180ms) var(--ease);
}
.bf-lex-search::placeholder { color: var(--text-tertiary); font-style: italic; }
.bf-lex-search:focus {
  outline: none;
  border-color: var(--border-selected);
}
.bf-lex-search-count {
  font-size: var(--size-tiny);
  color: var(--text-tertiary);
  font-style: italic;
  min-width: 60px; text-align: right;
}

/* ── Body ────────────────────────────────────────────────────── */
.bf-lex-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-3) 0 var(--space-6);
}
.bf-lex-body::-webkit-scrollbar { width: 8px; }
.bf-lex-body::-webkit-scrollbar-thumb { background: var(--border-rest); border-radius: 999px; }
.bf-lex-body::-webkit-scrollbar-track { background: transparent; }

.bf-lex-empty {
  padding: var(--space-8) var(--space-5);
  color: var(--text-tertiary);
  font-style: italic;
  font-size: var(--size-small);
  text-align: center;
}

/* ── Section (per layer) ─────────────────────────────────────── */
.bf-lex-section {
  border-bottom: 0.5px solid var(--border-rest);
}
.bf-lex-section:last-child { border-bottom: none; }

.bf-lex-section-header {
  width: 100%;
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: baseline;
  gap: var(--space-2) var(--space-3);
  padding: var(--space-4) var(--space-5);
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--text-primary);
  transition: background var(--motion-short, 180ms) var(--ease);
}
.bf-lex-section-header:hover {
  background: color-mix(in srgb, var(--text-tertiary) 6%, transparent);
}
.bf-lex-section-caret {
  color: var(--text-tertiary);
  font-size: var(--size-small);
  line-height: 1;
}
.bf-lex-section-name {
  font-size: var(--size-body);
  font-weight: var(--weight-medium);
  letter-spacing: var(--track-body);
  color: var(--text-primary);
}
.bf-lex-section-blurb {
  grid-column: 2;
  font-size: var(--size-tiny);
  color: var(--text-tertiary);
  font-style: italic;
  margin-top: 2px;
}
.bf-lex-section-count {
  font-size: var(--size-tiny);
  color: var(--text-tertiary);
  font-variant-numeric: tabular-nums;
  align-self: baseline;
}

/* ── Terms list ──────────────────────────────────────────────── */
.bf-lex-terms {
  list-style: none;
  padding: 0 0 var(--space-3);
  margin: 0;
}
.bf-lex-term {
  border-top: 0.5px solid var(--surface-divider);
}
.bf-lex-term:first-child { border-top: 0.5px solid var(--surface-divider); }

.bf-lex-term-summary {
  width: 100%;
  display: grid;
  grid-template-columns: auto auto auto auto 1fr auto;
  align-items: baseline;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  color: var(--text-primary);
  transition: background var(--motion-short, 180ms) var(--ease);
}
.bf-lex-term-summary:hover {
  background: color-mix(in srgb, var(--text-tertiary) 5%, transparent);
}
.bf-lex-term-name {
  font-size: var(--size-small);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  letter-spacing: var(--track-body);
}
.bf-lex-term-type {
  font-size: 9.5px;
  letter-spacing: var(--track-uppercase, 0.14em);
  text-transform: uppercase;
  color: var(--text-muted);
  font-style: italic;
}
.bf-lex-term-tag {
  font-size: 9.5px;
  letter-spacing: var(--track-uppercase, 0.14em);
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: var(--radius-sm, 3px);
  background: color-mix(in srgb, var(--text-tertiary) 12%, transparent);
  color: var(--text-secondary);
}
.bf-lex-term-tag[data-tag="front"] {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
}
.bf-lex-term-tag[data-tag="back"] {
  background: color-mix(in srgb, var(--text-tertiary) 16%, transparent);
}
.bf-lex-term-formerly {
  font-size: var(--size-tiny);
  color: var(--text-tertiary);
  font-style: italic;
}
.bf-lex-term-def {
  grid-column: 1 / -1;
  font-size: var(--size-tiny);
  color: var(--text-secondary);
  line-height: 1.5;
  margin-top: 2px;
}
.bf-lex-term-caret {
  color: var(--text-tertiary);
  font-size: 14px;
  line-height: 1;
  grid-column: -1;
  grid-row: 1;
}
.bf-lex-term[data-expanded="true"] {
  background: color-mix(in srgb, var(--surface-elevated) 60%, transparent);
}

/* ── Term details (expanded) ─────────────────────────────────── */
.bf-lex-term-details {
  padding: 0 var(--space-5) var(--space-4) calc(var(--space-5));
  display: flex; flex-direction: column;
  gap: var(--space-2);
}
.bf-lex-term-full-def {
  font-size: var(--size-small);
  color: var(--text-primary);
  line-height: 1.55;
  padding: var(--space-2) 0;
}
.bf-lex-term-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: var(--space-3);
  font-size: var(--size-tiny);
  align-items: baseline;
}
.bf-lex-term-label {
  color: var(--text-tertiary);
  font-style: italic;
  letter-spacing: var(--track-body);
}
.bf-lex-term-value {
  color: var(--text-primary);
  line-height: 1.5;
}

/* ── Footer ──────────────────────────────────────────────────── */
.bf-lex-footer {
  padding: var(--space-4) var(--space-5);
  border-top: 0.5px solid var(--border-rest);
  background: var(--surface-elevated);
}
.bf-lex-footer-link {
  font-size: var(--size-small);
  color: var(--accent);
  text-decoration: none;
  letter-spacing: var(--track-body);
  transition: color var(--motion-short, 180ms) var(--ease);
}
.bf-lex-footer-link:hover {
  color: var(--text-primary);
}

/* ── Small viewport (drawer becomes near-fullscreen) ─────────── */
@media (max-width: 520px) {
  .bf-lex-drawer { width: 100vw; }
  .bf-lex-term-row { grid-template-columns: 1fr; gap: 2px; }
}

/* ── Topbar pill button (base) — DS-D158 trigger visuals ─────────
   Ships with the drawer so any page carrying the trigger picks up
   the pill styles without needing baseforce.css. Pill button mounts
   inside a page's topbar right-side cluster. Base visual; semantic
   markers layer on top (see .topbar-lex-btn). Tokens only per §11. */
.topbar-btn {
  display: inline-flex; align-items: center; gap: var(--space-2);
  padding: 5px 12px 5px 13px;
  background: transparent;
  border: 0.5px solid var(--border-rest);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-family: var(--font-sans);
  font-size: var(--size-small);
  cursor: pointer;
  transition: color var(--motion-short, 180ms) var(--ease, cubic-bezier(0.2,0,0,1)),
              border-color var(--motion-short, 180ms) var(--ease, cubic-bezier(0.2,0,0,1));
}
.topbar-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-hover);
}
.topbar-btn-label { letter-spacing: var(--track-body); }

/* Semantic marker — DS-D158 Lexicon trigger. Visuals live on .topbar-btn;
   this class exists so audits can grep the Lexicon trigger by intent. */
.topbar-lex-btn { /* semantic marker; no styles of its own */ }