/* ── 74Sim Stylesheet ─── Black & White Theme ─────────────────────────────── */

/* ── Design tokens ──────────────────────────────────────────────────────────
   Standardized breakpoints (used in @media queries throughout):
     --bp-sm   480px   phones
     --bp-md   768px   tablets / simulator minimum
     --bp-lg   1024px  small laptop
     --bp-xl   1400px  desktop (side-panel widens)
     --bp-2xl  1800px  ultrawide (side-panel widens further)
   Note: CSS custom properties cannot be used inside @media conditions, so
   the numeric values are repeated in each query below. Treat the comment
   above as the source of truth.
*/
:root {
  /* Side panel width fluid; overridden by drawer rules at small widths */
  --side-panel-w: clamp(280px, 24vw, 460px);

  /* Spacing scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;

  /* Type scale */
  --font-xs: 11px;
  --font-sm: 12px;
  --font-md: 13px;
  --font-lg: 15px;
  --font-xl: 18px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  height: 100%;
  overflow: hidden;
  font-family: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  background: #1a1a1a;
  color: #ffffff;
}

/* ── App Layout ──────────────────────────────────────────────────────────── */

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* ── Toolbar ─────────────────────────────────────────────────────────────── */

#toolbar {
  display: flex;
  align-items: stretch;
  flex-wrap: nowrap;
  gap: clamp(2px, 0.3vw, 6px);
  background: #111;
  border-bottom: 1px solid #333;
  padding: clamp(4px, 0.5vw, 10px) clamp(8px, 1vw, 18px);
  min-height: clamp(42px, 5.5vh, 72px);
  z-index: 100;
  flex-shrink: 0;
}

/* On narrow viewports, hide the brand title to reclaim toolbar space. */
@media (max-width: 900px) {
  .toolbar-title { display: none; }
}

#toolbar > div[style*="position:relative"] {
  display: flex;
  align-items: stretch;
}

.toolbar-btn {
  background: #222;
  color: #ffffff;
  border: 1px solid #444;
  padding: 0 clamp(12px, 1.4vw, 22px);
  font-family: inherit;
  font-size: clamp(10px, 0.95vw, 15px);
  cursor: pointer;
  border-radius: 3px;
  position: relative;
  white-space: nowrap;
  align-self: stretch;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.toolbar-btn:hover {
  background: #333;
  color: #fff;
}

.toolbar-btn.active {
  background: #444;
  color: #fff;
  border-color: #888;
}

.toolbar-spacer {
  flex: 1;
  min-width: 8px;
}

.toolbar-title {
  font-size: clamp(14px, 1.3vw, 20px);
  font-weight: bold;
  color: #888;
  margin-right: clamp(12px, 1.2vw, 24px);
  letter-spacing: 1px;
  display: inline-flex;
  align-items: center;
}

/* ── Dropdown Panels ─────────────────────────────────────────────────────── */

#dropdown-chip {
  min-width: 364px;
}

#dropdown-chip .dropdown-list {
  max-height: 480px;
}

.dropdown-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 280px;
  max-width: calc(100vw - 16px);
  max-height: min(600px, 80vh);
  background: #1e1e1e;
  border: 1px solid #444;
  border-radius: 4px;
  overflow: hidden;
  z-index: 200;
  margin-top: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.5);
}

.dropdown-panel.show {
  display: block;
}

.dropdown-section {
  padding: 6px 10px;
  border-bottom: 1px solid #333;
}

.dropdown-divider {
  border-top: 1px solid #444;
  margin: 6px 0;
}

.dropdown-submenu {
  padding-left: 12px;
}

.dropdown-submenu-trigger .dropdown-item-name {
  color: #ffffff;
}

.dropdown-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin-bottom: 4px;
}

.dropdown-search {
  width: 100%;
  background: #2a2a2a;
  border: 1px solid #444;
  color: #ffffff;
  padding: 5px 8px;
  font-family: inherit;
  font-size: 12px;
  border-radius: 3px;
  outline: none;
  box-sizing: border-box;
}

.chip-sort-label {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 5px;
  font-size: 11px;
  color: #888;
  cursor: pointer;
  user-select: none;
}
.chip-sort-label input[type="checkbox"] {
  accent-color: #888;
  cursor: pointer;
}

.dropdown-search:focus {
  border-color: #888;
}

.dropdown-list {
  max-height: 300px;
  overflow-y: auto;
}

.dropdown-item {
  padding: 6px 10px;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  border-bottom: 1px solid #2a2a2a;
}

.dropdown-item:hover {
  background: #333;
}

.dropdown-item-name {
  font-size: 12px;
  font-weight: bold;
  color: #ddd;
}

.dropdown-item-desc {
  font-size: 10px;
  color: #fff;
  margin-top: 2px;
}

/* Toggle items inside dropdowns circle outline when off, filled when active */
.dropdown-item-toggle .dropdown-item-name::before {
  content: '○ ';
  display: inline-block;
  width: 14px;
}

.dropdown-item-toggle.active .dropdown-item-name::before {
  content: '● ';
  color: #aaa;
}

.dropdown-divider {
  border: none;
  border-top: 2px solid #555;
  margin: 4px 0;
}

/* ── Cached Projects ─────────────────────────────────────────────────────── */

.cached-projects-header {
  padding: 6px 10px 3px;
  font-size: 11px;
  font-weight: 600;
  color: #e0e0e0;
  letter-spacing: 0.3px;
  user-select: none;
}

#cached-projects-list {
  max-height: 200px;
  overflow-y: auto;
}

.cached-project-empty {
  padding: 6px 10px 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.cached-project-item {
  padding: 6px 10px;
  cursor: pointer;
  border-bottom: 1px solid #2a2a2a;
}

.cached-project-item:hover {
  background: #2c2c2c;
}

.cached-project-active {
  background: #222;
  cursor: default;
}

.cached-project-row {
  display: flex;
  align-items: center;
  gap: 6px;
}

.cached-project-info {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-width: 0;
}

.cached-project-name {
  font-size: 12px;
  font-weight: bold;
  color: #f0f0f0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.cached-project-badge {
  font-size: 10px;
  font-weight: 500;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: 3px;
  padding: 0 4px;
  vertical-align: middle;
  margin-left: 4px;
  letter-spacing: 0.2px;
}

.cached-project-meta {
  font-size: 10px;
  color: var(--text-muted);
  margin-top: 1px;
}

.cached-project-delete {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  flex-shrink: 0;
  transition: color 0.15s;
}

.cached-project-delete:hover {
  color: #c44;
}

/* ── Main Area ───────────────────────────────────────────────────────────── */

#main-area {
  display: flex;
  flex: 1;
  overflow: hidden;
  position: relative; /* anchors side-panel drawer at small viewports */
}

/* ── Status Bar ──────────────────────────────────────────────────────────── */
#status-bar {
  height: 24px;
  background: #141414;
  border-top: 1px solid #2a2a2a;
  display: flex;
  align-items: center;
  padding: 0 12px;
  font-size: 11px;
  flex-shrink: 0;
}

#overcurrent-status {
  color: #ff4444;
  cursor: pointer;
  user-select: none;
}

#overcurrent-status:hover {
  text-decoration: underline;
}

#app-info {
  margin-left: auto;
  color: #888;
  font-size: 11px;
  user-select: none;
}

#app-info a {
  color: #888;
  text-decoration: none;
}

#app-info a:hover {
  color: #bbb;
  text-decoration: underline;
}

#app-version {
  margin-left: 26px;
}

#rotating-message-text {
  transition: opacity 0.4s ease;
}

#rotating-message-text.fading {
  opacity: 0;
}

.rotating-msg-btn {
  background: none;
  border: none;
  color: #888;
  font-family: inherit;
  font-size: 11px;
  cursor: pointer;
  padding: 0;
}

.rotating-msg-btn:hover {
  color: #bbb;
  text-decoration: underline;
}

#overcurrent-status:empty {
  display: none;
}

#canvas-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

#canvas-container canvas {
  display: block;
}

/* ── Side Panel (Logic) ──────────────────────────────────────────────────── */

#side-panel {
  width: var(--side-panel-w);
  background: #1e1e1e;
  border-left: 1px solid #333;
  overflow-y: auto;
  flex-shrink: 0;
  padding: 12px;
  font-size: 12px;
  position: relative;
  z-index: 100;
  transition: width 0.18s ease, transform 0.18s ease;
}

#side-panel.collapsed {
  width: 0;
  padding: 0;
  border: none;
  overflow: hidden;
}

/* Tablet/small-laptop: side panel becomes a slide-over drawer so the canvas
   keeps the full width. The existing .collapsed class drives visibility. */
@media (max-width: 1024px) {
  #side-panel {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(420px, 92vw);
    z-index: 150;
    box-shadow: -4px 0 16px rgba(0, 0, 0, 0.5);
    transform: translateX(0);
  }
  #side-panel.collapsed {
    width: min(420px, 92vw);
    padding: 12px;
    border-left: 1px solid #333;
    overflow: hidden;
    transform: translateX(100%);
    pointer-events: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  #side-panel { transition: none; }
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.panel-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.2px;
}

.panel-toggle {
  background: none;
  border: none;
  color: #888;
  cursor: pointer;
  font-size: 14px;
  padding: 2px 6px;
}

.panel-toggle:hover {
  color: #fff;
}

/* ── Expression Display ──────────────────────────────────────────────────── */

.expr-block {
  background: #2a2a2a;
  border: 1px solid #444;
  border-radius: 4px;
  padding: 8px;
  margin-bottom: 10px;
}

.expr-label {
  font-size: 10px;
  color: #888;
  margin-bottom: 4px;
}

.expr-text {
  font-size: 12px;
  color: #ddd;
  word-break: break-all;
}

/* ── Truth Table ─────────────────────────────────────────────────────────── */

.truth-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 12px;
  font-size: 11px;
}

.truth-table th {
  background: #333;
  color: #aaa;
  padding: 4px 8px;
  border: 1px solid #444;
  text-align: center;
}

.truth-table td {
  padding: 3px 8px;
  border: 1px solid #333;
  text-align: center;
  color: #ffffff;
}

.truth-table tr:nth-child(even) td {
  background: #252525;
}

.truth-table td.output-col {
  font-weight: bold;
  color: #fff;
}

/* ── Warning Box ─────────────────────────────────────────────────────────── */

.warning-box {
  background: #332b00;
  border: 1px solid #665500;
  color: #ddaa00;
  padding: 8px;
  border-radius: 4px;
  margin-bottom: 10px;
  font-size: 11px;
}

/* ── Simulation Note ─────────────────────────────────────────────────────── */

.sim-note {
  color: #666;
  font-size: 10px;
  font-style: italic;
  padding: 10px 8px 4px;
  border-top: 1px solid #2a2a2a;
  margin-top: 10px;
  line-height: 1.5;
}

/* ── Empty State ─────────────────────────────────────────────────────────── */

.empty-state {
  color: var(--text-muted);
  text-align: center;
  padding: 24px 12px;
  font-size: 12px;
  line-height: 1.6;
}

/* ── Logic Analyzer Panel ────────────────────────────────────────────────── */
/* Visually aligned with Circuit Analyzer (.ci-*): compact monochrome tables,
   neutral grays, white reserved for active values. */

.la-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin: 12px 0 5px;
  border-bottom: 1px solid #333;
  padding-bottom: 3px;
}

.la-section-title:first-child {
  margin-top: 0;
}

.la-expr {
  background: #222;
  border: 1px solid #383838;
  border-radius: 3px;
  padding: 5px 8px;
  margin-bottom: 4px;
  font-family: monospace;
  font-size: 11px;
  color: #ffffff;
  word-break: break-all;
  line-height: 1.5;
}

.la-expr .la-out-name {
  color: #ffffff;
  font-weight: bold;
}

.la-expr .la-eq {
  color: var(--text-muted);
  margin: 0 2px;
}

.la-non-comb-label {
  color: var(--text-faint);
  font-style: italic;
}

.la-sequential-warning {
  background: #1c1c1c;
  border: 1px solid #383838;
  border-radius: 3px;
  padding: 5px 8px;
  margin-bottom: 6px;
  font-size: 10px;
  color: var(--text-muted);
}

.la-state-list {
  list-style: none;
  padding: 0;
  margin: 0 0 2px;
  background: #222;
  border: 1px solid #383838;
  border-radius: 3px;
  overflow: hidden;
}

.la-state-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 3px 6px;
  font-size: 10px;
  color: #ffffff;
  border-bottom: 1px solid #2c2c2c;
}

.la-state-item:nth-child(even) {
  background: #252525;
}

.la-state-item:last-child {
  border-bottom: none;
}

.la-state-item--interactive {
  cursor: pointer;
  user-select: none;
}

.la-state-item--interactive:hover {
  background: #2e2e2e;
}

.la-state-label {
  font-family: monospace;
  font-weight: bold;
  color: #aaa;
}

.la-state-label-in,
.la-state-label-out {
  color: #aaa;
}

.la-state-val {
  font-family: monospace;
  font-size: 10px;
  font-weight: bold;
}

.la-state-on {
  color: #ffffff;
}

.la-state-off {
  color: var(--text-faint);
  font-weight: normal;
}

/* Format selector header */
.la-expr-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.la-format-select {
  background: #222;
  color: var(--text-dim);
  border: 1px solid #383838;
  border-radius: 3px;
  font-size: 10px;
  font-family: monospace;
  padding: 2px 4px;
  cursor: pointer;
  text-transform: none;
  letter-spacing: 0;
}

.la-format-select:hover {
  border-color: #555;
}

/* K-Map and Truth Table */
.la-kmap-block,
.la-tt-block {
  margin-bottom: 8px;
}

.la-kmap-title,
.la-tt-title {
  font-family: monospace;
  font-size: 10px;
  color: #aaa;
  margin-bottom: 3px;
}

.la-kmap,
.la-tt {
  border-collapse: collapse;
  font-family: monospace;
  font-size: 10px;
  color: #ffffff;
  background: #222;
  border: 1px solid #383838;
  border-radius: 3px;
  margin-bottom: 4px;
  overflow: hidden;
}

.la-kmap th,
.la-kmap td,
.la-tt th,
.la-tt td {
  border-bottom: 1px solid #2c2c2c;
  border-right: 1px solid #2c2c2c;
  padding: 3px 8px;
  text-align: center;
  min-width: 22px;
}

.la-kmap tr:last-child th,
.la-kmap tr:last-child td,
.la-tt tr:last-child th,
.la-tt tr:last-child td {
  border-bottom: none;
}

.la-kmap th:last-child,
.la-kmap td:last-child,
.la-tt th:last-child,
.la-tt td:last-child {
  border-right: none;
}

.la-kmap th,
.la-tt th {
  background: #2a2a2a;
  color: var(--text-muted);
  font-weight: 600;
  letter-spacing: 0.2px;
}

.la-kmap-corner {
  position: relative;
  background: #2a2a2a !important;
  color: var(--text-muted) !important;
  font-size: 10px;
  padding: 2px 6px !important;
  white-space: nowrap;
}

.la-kmap-rowname,
.la-kmap-colname {
  color: var(--text-muted);
}

.la-kmap-slash {
  color: var(--text-faint);
  padding: 0 2px;
}

.la-kmap-one,
.la-tt-one {
  color: #ffffff;
  font-weight: bold;
}

.la-kmap-zero,
.la-tt-zero {
  color: var(--text-faint);
}

.la-tt-out {
  color: #ffffff;
  font-weight: 600;
}

.la-kmap-empty,
.la-tt-empty {
  font-family: monospace;
  font-size: 10px;
  color: var(--text-muted);
  font-style: italic;
  padding: 4px 0;
}

/* ── Scrollbar Styling ───────────────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: #1a1a1a;
}

::-webkit-scrollbar-thumb {
  background: #444;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #555;
}

/* ── Welcome Overlay ─────────────────────────────────────────────────────── */

#welcome-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.80);
  display: flex;
  align-items: center;
  justify-content: center;
}

#welcome-overlay.hidden {
  display: none;
}

#welcome-modal {
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 6px;
  padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1.5rem, 4vw, 2.5rem) clamp(1.25rem, 3vw, 2rem);
  max-width: 480px;
  width: 90%;
  max-height: 92vh;
  overflow-y: auto;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7);
}

#welcome-title {
  font-family: monospace;
  font-size: 22px;
  font-weight: 700;
  color: #eee;
  margin: 0 0 1rem;
  letter-spacing: 0.03em;
}

#welcome-desc {
  font-family: monospace;
  font-size: 13px;
  color: #999;
  line-height: 1.6;
  margin: 0 0 1.75rem;
}

#welcome-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.welcome-btn {
  font-family: monospace;
  font-size: 13px;
  padding: 7px 16px;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  border: 1px solid transparent;
  transition: background 0.15s, color 0.15s;
}

.welcome-btn-primary {
  background: #eee;
  color: #111;
  border-color: #eee;
  margin-left: auto;
}

.welcome-btn-primary:hover {
  background: #fff;
  border-color: #fff;
}

.welcome-btn-secondary {
  background: transparent;
  color: #aaa;
  border-color: #444;
}

.welcome-btn-secondary:hover {
  background: #2a2a2a;
  color: #ddd;
  border-color: #555;
}

/* ── Update Log Overlay ──────────────────────────────────────────────────── */

.update-log-overlay {
  position: fixed;
  inset: 0;
  z-index: 2100;
  background: rgba(0, 0, 0, 0.80);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: monospace;
}

.update-log-modal {
  background: #1e1e1e;
  border: 1px solid #333;
  border-radius: 6px;
  width: min(560px, 92%);
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7);
}

.update-log-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px 10px;
  border-bottom: 1px solid #2a2a2a;
}

.update-log-title {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: #eee;
  letter-spacing: 0.04em;
}

.update-log-close {
  background: none;
  border: none;
  color: #888;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 3px;
}

.update-log-close:hover {
  color: #eee;
  background: #333;
}

.update-log-current {
  font-size: 12px;
  color: #888;
  letter-spacing: 0.05em;
}

.update-log-body {
  padding: 14px 22px 4px;
  overflow-y: auto;
  flex: 1;
}

.update-log-entry {
  padding: 10px 0 14px;
  border-bottom: 1px solid #262626;
}

.update-log-entry:last-child {
  border-bottom: none;
}

.update-log-entry-head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 4px;
}

.update-log-version {
  font-size: 13px;
  font-weight: 700;
  color: #eee;
}

.update-log-date {
  font-size: 11px;
  color: #777;
}

.update-log-entry-title {
  font-size: 12px;
  color: #aaa;
  margin-bottom: 8px;
}

.update-log-changes {
  margin: 0;
  padding-left: 18px;
  color: #bbb;
  font-size: 12px;
  line-height: 1.65;
}

.update-log-changes li {
  margin-bottom: 4px;
}

.update-log-footer {
  padding: 12px 22px 16px;
  border-top: 1px solid #2a2a2a;
  text-align: right;
}

.update-log-btn {
  background: #eee;
  color: #111;
  border: 1px solid #eee;
  border-radius: 3px;
  font-family: monospace;
  font-size: 13px;
  font-weight: 700;
  padding: 7px 18px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
}

.update-log-btn:hover {
  background: #fff;
  border-color: #fff;
}

/* ── Chip Info Panel ─────────────────────────────────────────────────────── */

.chip-info-desc {
  color: #fff;
  font-size: 12px;
  margin-bottom: 10px;
}

.chip-datasheet-link {
  display: inline-block;
  color: #6af;
  font-size: 11px;
  text-decoration: none;
  margin-bottom: 14px;
  border: 1px solid #335;
  padding: 4px 10px;
  border-radius: 3px;
}

.chip-family-override-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin: 10px 0 14px;
  font-size: 10px;
  color: var(--text-muted);
}

.chip-family-override-label {
  color: var(--text-muted);
  flex-shrink: 0;
  font-size: 10px;
}

.chip-family-override-select {
  background: #1e1e1e;
  border: 1px solid #333;
  color: var(--text-dim);
  padding: 2px 5px;
  font-family: inherit;
  font-size: 10px;
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

.chip-family-override-select:focus {
  border-color: #666;
}

.chip-datasheet-link:hover {
  background: #223;
  color: #8cf;
}

.chip-pinout {
  margin-bottom: 14px;
}

.chip-pinout-header {
  text-align: center;
  font-size: 11px;
  font-weight: bold;
  color: #888;
  margin-bottom: 6px;
  text-align: center;
}

.chip-pinout-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 11px;
  background: #222;
  border: 1px solid #444;
  border-radius: 4px;
}

.chip-pinout-table tr:first-child td {
  border-top: none;
}

.chip-pinout-table td {
  padding: 3px 6px;
  border-top: 1px solid #333;
}

.chip-pinout-table .pin-name {
  width: 35%;
  font-weight: bold;
}

.chip-pinout-table .pin-name.pin-input { color: #8d8; }
.chip-pinout-table .pin-name.pin-output { color: #e88; }
.chip-pinout-table .pin-name.pin-power { color: #fd6; }

.chip-pinout-table .pin-num {
  width: 10%;
  text-align: center;
  color: #888;
  font-size: 10px;
}

.chip-pinout-table .pin-body {
  width: 10%;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
  border-left: 2px solid var(--border-strong);
  border-right: 2px solid var(--border-strong);
}

.chip-pinout-table td:first-child {
  text-align: right;
}

.chip-pinout-table td:last-child {
  text-align: left;
}

.chip-pinout-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 10px;
  margin-top: 14px;
  margin-bottom: 8px;
  color: #666;
  justify-content: center;
}

.legend-input { color: #8d8; }
.legend-output { color: #e88; }
.legend-power { color: #fd6; }
.legend-nc { color: #888; }

/* ── SVG DIP Chip Diagram ────────────────────────────────────────────────── */

.chip-dip-wrap {
  overflow-x: auto;
  margin: 14px 0 8px;
  -webkit-overflow-scrolling: touch;
  display: flex;
  justify-content: center;
}

.chip-dip-svg {
  display: block;
  width: auto;
  max-width: 100%;
  height: auto;
}

/* ── Chip Help Section ─────────────────────────────────────────────────── */

/* ── Live Gate Evaluation ─────────────────────────────────────────────── */

.gate-eval-section {
  margin-top: 12px;
  border-top: 1px solid #333;
  padding-top: 8px;
  margin-bottom: 4px;
}

.gate-eval-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
  margin-bottom: 6px;
}

.gate-eval-row {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-family: Menlo, Consolas, monospace;
  font-size: 11px;
  color: #aaa;
  padding: 2px 0;
}

.gate-eval-num {
  color: var(--text-muted);
  min-width: 14px;
  text-align: right;
}

.gate-eval-expr {
  color: #bbb;
}

.gate-eval-out {
  font-weight: bold;
}

.gate-eval-hi {
  color: #4f4;
}

.gate-eval-lo {
  color: #f66;
}

.chip-help-section {
  margin-top: 14px;
  border-top: 1px solid #333;
  padding-top: 10px;
}

.chip-help-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
  margin-bottom: 8px;
}

.chip-help-btn {
  background: none;
  border: 1px solid #555;
  color: #999;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 3px;
  cursor: pointer;
  font-family: inherit;
}

.chip-help-btn:hover {
  border-color: #888;
  color: #ffffff;
  background: #1e1e1e;
}

.chip-help-text {
  margin-top: 10px;
  font-size: 11px;
  color: #aaa;
  line-height: 1.6;
  padding: 8px 10px;
  background: #1a1a1a;
  border: 1px solid #333;
  border-radius: 4px;
}

.chip-help-text.chip-help-text-open {
  display: block;
}

/* ── Chip Guide ───────────────────────────────────────────────────────── */

.chip-guide-overview {
  font-size: 11px;
  color: #bbb;
  line-height: 1.55;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid #333;
}

.chip-guide-subtitle {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
  margin: 10px 0 4px;
}

.chip-guide-row {
  font-size: 11px;
  color: #bbb;
  margin-bottom: 2px;
}


.chip-guide-figure {
  margin: 6px 0 10px;
}

.chip-guide-image {
  display: block;
  width: 100%;
  max-width: 100%;
  border: 1px solid #333;
  border-radius: 4px;
  background: #fff;
}

.chip-guide-caption {
  font-size: 10px;
  color: #666;
  margin-top: 5px;
  line-height: 1.4;
}

.chip-guide-paragraph {
  font-size: 11px;
  color: #aaa;
  line-height: 1.6;
  margin-bottom: 7px;
}

.chip-guide-formulas {
  margin: 6px 0 8px;
}

.chip-guide-formula {
  font-family: 'SF Mono', 'Consolas', monospace;
  font-size: 11px;
  color: #cfcfcf;
  background: #151515;
  border: 1px solid #2d2d2d;
  border-radius: 3px;
  padding: 4px 6px;
  margin-bottom: 4px;
}

.chip-guide-list {
  margin: 6px 0 8px 18px;
  color: #aaa;
}

.chip-guide-list li {
  margin-bottom: 5px;
  line-height: 1.5;
}

.chip-guide-table {
  width: 100%;
  border-collapse: collapse;
  margin: 4px 0 8px;
}

.chip-guide-table td {
  font-size: 11px;
  padding: 2px 6px 2px 0;
  border-bottom: 1px solid #2a2a2a;
  vertical-align: top;
}

.chip-guide-table .cg-pin {
  color: #888;
  white-space: nowrap;
  width: 42px;
}

.chip-guide-table .cg-name {
  color: #ffffff;
  font-family: 'SF Mono', 'Consolas', monospace;
  white-space: nowrap;
  width: 50px;
}

.chip-guide-table .cg-desc {
  color: #999;
}

.chip-guide-gate {
  font-size: 11px;
  color: #aaa;
  margin: 4px 0;
  line-height: 1.5;
}

.chip-guide-tips {
  font-size: 11px;
  color: #aaa;
  line-height: 1.7;
}

/* ── 7 Segment Info Panel ───────────────────────────────────────────────── */

.seven-seg-panel {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.seven-seg-visual {
  flex-shrink: 0;
  background: #111;
  border: 1px solid #444;
  border-radius: 4px;
  padding: 6px;
}

.seven-seg-svg {
  display: block;
  width: 52px;
  height: 78px;
}

.seven-seg-info {
  flex: 1;
  min-width: 0;
}

.seven-seg-pin-table {
  margin-top: 6px;
}

.seven-seg-pin-table th {
  font-size: 10px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.2px;
  padding: 2px 4px;
  border-bottom: 1px solid #333;
}



/* ── Component State Badge (Button / Slide Switch) ─────────────────────── */

.comp-state-wrap {
  margin-bottom: 8px;
}

.comp-state-badge {
  display: inline-block;
  font-size: 11px;
  font-weight: bold;
  padding: 5px 10px;
  border-radius: 4px;
  letter-spacing: 0.3px;
}

.comp-state-active {
  background: #1a2f1a;
  color: #6f6;
  border: 1px solid #3a5a3a;
}

.comp-state-inactive {
  background: #222;
  color: #888;
  border: 1px solid #404040;
}

/* ── Button / SPDT SVG pinout diagrams ─────────────────────────────────── */

.btn-pinout-wrap {
  display: flex;
  justify-content: center;
  margin: 10px 0;
}

.btn-pinout-svg {
  width: 90px;
  height: 90px;
}

.spdt-svg {
  width: 130px;
  height: 70px;
}

/* ── Chip Powered Badge ─────────────────────────────────────────────────── */

.chip-power-badge {
  font-size: 11px;
  font-weight: bold;
  padding: 6px 10px;
  border-radius: 4px;
  margin-bottom: 10px;
  letter-spacing: 0.3px;
}

.chip-power-ok {
  background: #1a3a1a;
  color: #6f6;
  border: 1px solid #3a6a3a;
}

.chip-power-partial {
  background: #3a2c00;
  color: #fc6;
  border: 1px solid #6a4c00;
}

.chip-power-none {
  background: #3a1a1a;
  color: #f66;
  border: 1px solid #6a2a2a;
}

.pin-v-hi   { color: #6f6; font-size: 10px; font-weight: bold; }
.pin-v-lo   { color: #f66; font-size: 10px; font-weight: bold; }
.pin-v-float{ color: #666; font-size: 10px; }
.pin-v-mid  { color: #fc6; font-size: 10px; }



/* ── Floating Input Panel (resistor edit, etc.) ─────────────────────────── */

.floating.input-panel {
  position: fixed;
  z-index: 1000;
  background: #1e1e1e;
  border: 1px solid #555;
  border-radius: 5px;
  padding: 10px 12px;
  box-shadow: 0 4px 16px rgba(0,0,0,0.6);
  min-width: 200px;
}

.floating.input-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 7px;
}

.floating.input-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
}

.floating.input-x-btn {
  background: none;
  border: none;
  color: #666;
  font-size: 16px;
  line-height: 1;
  padding: 0 0 0 8px;
  cursor: pointer;
}

.floating.input-x-btn:hover {
  color: #bbb;
}

.floating.input-row {
  display: flex;
  gap: 6px;
  align-items: center;
}

.floating.input-field {
  flex: 1;
  background: #2a2a2a;
  border: 1px solid #555;
  border-radius: 3px;
  color: #ddd;
  font-family: inherit;
  font-size: 13px;
  padding: 5px 8px;
  outline: none;
  min-width: 0;
}

.floating.input-field:focus {
  border-color: #888;
}

.floating.input-units {
  background: #2a2a2a;
  border: 1px solid #555;
  border-radius: 3px;
  color: #ddd;
  font-family: inherit;
  font-size: 13px;
  padding: 5px 6px;
  outline: none;
  cursor: pointer;
}

.floating.input-units:focus {
  border-color: #888;
}

.floating.input-presets {
  width: 100%;
  background: #2a2a2a;
  border: 1px solid #555;
  border-radius: 3px;
  color: #ddd;
  font-family: inherit;
  font-size: 12px;
  padding: 5px 6px;
  margin-top: 6px;
  outline: none;
  cursor: pointer;
}

.floating.input-presets:focus {
  border-color: #888;
}

/* "?" prefix-guide button inside the floating input row */
.floating-input-help-btn {
  background: none;
  border: 1px solid #555;
  border-radius: 3px;
  color: #888;
  font-size: 12px;
  font-weight: 700;
  line-height: 1;
  padding: 4px 7px;
  cursor: pointer;
  flex-shrink: 0;
  transition: color 0.15s, border-color 0.15s;
}
.floating-input-help-btn:hover,
.floating-input-help-btn.active {
  color: #ccc;
  border-color: #888;
}

/* Prefix-guide tooltip (hidden by default, toggled with .visible) */
.floating-input-help-tooltip {
  display: none;
  margin-top: 8px;
  padding: 8px 10px;
  background: #252525;
  border: 1px solid #444;
  border-radius: 4px;
  font-size: 11px;
  color: #bbb;
}
.floating-input-help-tooltip.visible {
  display: block;
}
.fih-row {
  display: flex;
  align-items: baseline;
  gap: 5px;
  margin-bottom: 3px;
}
.fih-row:last-child {
  margin-bottom: 0;
}
.fih-ex {
  font-family: monospace;
  font-size: 12px;
  color: #ddd;
  min-width: 30px;
}
.fih-arr {
  color: #666;
}
.fih-val {
  min-width: 48px;
  color: #ccc;
}
.fih-exp {
  color: #888;
  font-size: 10px;
}
.fih-note {
  margin-top: 5px;
  color: #666;
  font-size: 10px;
  font-style: italic;
}

/* ── Circuit Info Panel ──────────────────────────────────────────────────── */

.ci-section-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  letter-spacing: 0.3px;
  margin: 12px 0 5px;
  border-bottom: 1px solid #333;
  padding-bottom: 3px;
}

.ci-section-title:first-child {
  margin-top: 0;
}

.ci-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 10px;
  background: #222;
  border: 1px solid #383838;
  border-radius: 3px;
  margin-bottom: 2px;
}

.ci-table th {
  background: #2a2a2a;
  color: var(--text-muted);
  padding: 3px 5px;
  text-align: left;
  font-weight: 600;
  font-size: 10px;
  letter-spacing: 0.2px;
  border-bottom: 1px solid #383838;
}

.ci-table td {
  padding: 3px 5px;
  border-bottom: 1px solid #2c2c2c;
  color: #ffffff;
  vertical-align: middle;
}

.ci-table tr:last-child td {
  border-bottom: none;
}

.ci-table tr:nth-child(even) td {
  background: #252525;
}

.ci-lbl {
  font-weight: bold;
  color: #aaa;
  font-family: monospace;
  white-space: nowrap;
  width: 32px;
}

.ci-val {
  font-family: monospace;
  color: #bbb;
  white-space: nowrap;
  text-align: right;
}

.ci-conn {
  font-family: monospace;
  font-size: 9px;
  color: #777;
}

.ci-drop {
  color: #fc6;
}

.ci-cur {
  color: #8cf;
}

.ci-float {
  color: var(--text-muted);
}

/* Net labels */
.ci-net-vcc    { color: #f66; font-weight: bold; font-family: monospace; }
.ci-net-gnd    { color: #6af; font-weight: bold; font-family: monospace; }
.ci-net-num    { color: #aaa; font-family: monospace; }
.ci-net-short  { color: #f44; font-weight: bold; font-family: monospace; }

/* LED state */
.ci-led-on  { color: #fa0; font-weight: bold; font-size: 10px; }
.ci-led-off { color: var(--text-muted); font-size: 10px; }

/* Chip power */
.ci-powered   { color: #6f6; font-size: 10px; font-weight: bold; }
.ci-unpowered { color: #f66; font-size: 10px; }

/* Input states */
.ci-state-on  { color: #6f6; font-size: 10px; font-weight: bold; }
.ci-state-off { color: #666; font-size: 10px; }
.ci-state-sw  { color: #8cf; font-size: 10px; }

/* ── Circuit Info Warnings ───────────────────────────────────────────────── */

.ci-warning-item {
  font-size: 10px;
  padding: 5px 8px;
  border-radius: 3px;
  margin-bottom: 4px;
  line-height: 1.5;
}

.ci-warn-error {
  background: #2e1010;
  color: #f88;
  border: 1px solid #5a2020;
}

.ci-warn-warn {
  background: #2e2200;
  color: #fca;
  border: 1px solid #5a4400;
}

.ci-over {
  color: #f66;
  font-weight: bold;
  font-family: monospace;
  font-size: 10px;
}

.ci-row-warn td {
  background: #1e0808 !important;
}

.ci-clickable-row {
  cursor: pointer;
}

.ci-clickable-row:hover td {
  background: #1e2a2a !important;
}

.ci-selected td {
  background: #0d2a1a !important;
  outline: 1px solid #2a6a3a;
}

.ci-power-table {
  margin-bottom: 8px;
}

.ci-info-note {
  font-size: 10px;
  color: #789;
  background: #111a22;
  border: 1px solid #223344;
  border-radius: 3px;
  padding: 5px 8px;
  margin-top: 5px;
  line-height: 1.5;
}

/* ── Text Box Annotations ────────────────────────────────────────────────── */

#textbox-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 10;
}

.textbox {
  position: absolute;
  background: #1c1c1c;
  border: 1.5px solid #555;
  border-radius: 2px;
  box-sizing: border-box;
  pointer-events: all;
  cursor: grab;
  user-select: none;
}

.textbox:active {
  cursor: grabbing;
}

.textbox.selected {
  border-color: #aaa;
  box-shadow: 0 0 0 1px #555;
}

.textbox.editing {
  cursor: default;
}

.textbox-content {
  width: 100%;
  height: 100%;
  padding: 8px 10px;
  color: #ffffff;
  font-family: 'SF Mono', 'Menlo', 'Monaco', 'Consolas', monospace;
  /* Fixed world-pixel font size; pan/zoom is applied via a CSS transform on
     #textbox-layer, so text scales naturally with the canvas. */
  font-size: 13px;
  line-height: 1.5;
  word-wrap: break-word;
  overflow-wrap: break-word;
  white-space: pre-wrap;
  outline: none;
  box-sizing: border-box;
  overflow: hidden;
  pointer-events: none;
}

.textbox.editing .textbox-content {
  pointer-events: all;
  cursor: text;
  caret-color: #ffffff;
  overflow: auto;
}

/* Corner resize handles shown only when selected */
.textbox-handle {
  position: absolute;
  width: 9px;
  height: 9px;
  background: #999;
  border: 1px solid #1c1c1c;
  border-radius: 1px;
  display: none;
  z-index: 2;
}

.textbox.selected .textbox-handle { display: block; }

.textbox-handle-nw { top: -5px;    left: -5px;   cursor: nw-resize; }
.textbox-handle-ne { top: -5px;    right: -5px;  cursor: ne-resize; }
.textbox-handle-sw { bottom: -5px; left: -5px;   cursor: sw-resize; }
.textbox-handle-se { bottom: -5px; right: -5px;  cursor: se-resize; }

/* ── Right-click context panel controls ──────────────────────────────────── */

.ctx-panel-controls {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 12px;
}

.ctx-toggle-item {
  font-size: 12px;
  color: #aaa;
  cursor: pointer;
  padding: 3px 0;
  user-select: none;
}

.ctx-toggle-item::before {
  content: '○ ';
  display: inline-block;
  width: 14px;
}

.ctx-toggle-item.active {
  color: #ffffff;
}

.ctx-toggle-item.active::before {
  content: '● ';
  color: #aaa;
}

.ctx-toggle-item:hover {
  color: #fff;
}

.ctx-pullres-link {
  margin-top: 10px;
  font-size: 11px;
}

.ctx-duty-wrap {
  margin: 4px 4px 14px 4px;
  padding: 10px;
  background: #1c1c1c;
  border: 1px solid #333;
  border-radius: 4px;
}

.ctx-duty-label {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: #ddd;
  margin-bottom: 6px;
}

.ctx-duty-label span:last-child {
  color: #7af;
  font-family: monospace;
}

.ctx-duty-slider {
  width: 100%;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: #444;
  border-radius: 2px;
  outline: none;
  margin: 4px 0;
}

.ctx-duty-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #7af;
  cursor: pointer;
  border: none;
}

.ctx-duty-slider::-moz-range-thumb {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #7af;
  cursor: pointer;
  border: none;
}

.ctx-duty-help {
  font-size: 11px;
  color: #888;
  margin-top: 6px;
  line-height: 1.4;
}

.ctx-pullres-link a {
  color: #7af;
  text-decoration: none;
}

.ctx-pullres-link a:hover {
  text-decoration: underline;
}

.ctx-spdt-list {
  margin: 8px 0 0 16px;
  font-size: 11px;
  color: #aaa;
  line-height: 1.7;
}

.spdt-state-btns {
  display: flex;
  gap: 6px;
  justify-content: center;
  margin: 8px 0 12px;
}

.spdt-state-btn {
  flex: 1;
  padding: 6px 4px;
  font-size: 11px;
  font-family: monospace;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid #404040;
  background: #1e1e1e;
  color: #888;
  user-select: none;
}

.spdt-state-btn.active {
  background: #2c2c2c;
  color: #ffffff;
  border-color: #666;
}

.spdt-state-btn:hover:not(.active) {
  background: #2a2a2a;
  color: #ddd;
}

/* ── Responsive side panel ──────────────────────────────────────────────────
   Width is now driven by the fluid clamp() in --side-panel-w (see :root).
   This block is intentionally empty; previously there were hard-coded
   width overrides at 1400px/1800px which the clamp() now handles. */

/* ── Projects Modal ───────────────────────────────────────────────────────── */

.projects-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0, 0, 0, 0.75);
  display: flex;
  align-items: center;
  justify-content: center;
}

.projects-overlay.hidden {
  display: none;
}

.projects-modal {
  background: #1a1a1a;
  border: 1px solid #2e2e2e;
  border-radius: 6px;
  width: 540px;
  max-width: 92vw;
  max-height: 80vh;
  display: flex;
  flex-direction: column;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.8);
  font-family: 'SF Mono', 'Menlo', monospace;
  overflow: hidden;
}

.projects-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid #252525;
  flex-shrink: 0;
}

.projects-modal-title {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.2px;
  color: var(--text);
}

.projects-modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  padding: 0 2px;
  transition: color 0.15s;
}

.projects-modal-close:hover {
  color: #ffffff;
}

.projects-modal-actions {
  padding: 14px 20px;
  border-bottom: 1px solid #252525;
  flex-shrink: 0;
}

.projects-btn {
  font-family: inherit;
  font-size: 11px;
  padding: 7px 14px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.15s, border-color 0.15s;
}

.projects-btn-primary {
  background: #252525;
  border-color: #383838;
  color: #ffffff;
  width: 100%;
}

.projects-btn-primary:hover {
  background: #2e2e2e;
  border-color: #444;
}

.projects-list {
  flex: 1;
  overflow-y: auto;
  padding: 6px 0;
}

.projects-loading,
.projects-empty,
.projects-error {
  padding: 24px 20px;
  font-size: 12px;
  text-align: center;
}

.projects-loading { color: var(--text-muted); }
.projects-empty   { color: var(--text-muted); }
.projects-error   { color: #c06060; }

.project-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 20px;
  border-bottom: 1px solid #1e1e1e;
  transition: background 0.1s;
}

.project-row:last-child {
  border-bottom: none;
}

.project-row:hover {
  background: #212121;
}

.project-row-info {
  flex: 1;
  min-width: 0;
}

.project-row-name {
  font-size: 12px;
  color: #ddd;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.project-row-meta {
  font-size: 11px;
  color: var(--text-faint);
  margin-top: 3px;
}

.project-row-btns {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.project-btn {
  font-family: inherit;
  font-size: 10px;
  padding: 4px 10px;
  border-radius: 3px;
  cursor: pointer;
  background: none;
  border: 1px solid #333;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.project-btn-open {
  color: #aaa;
}

.project-btn-open:hover {
  background: #2a2a2a;
  border-color: #555;
  color: #eee;
}

.project-btn-delete {
  color: #7a3a3a;
  border-color: #3a2a2a;
}

.project-btn-delete:hover {
  background: #2a1818;
  border-color: #6a3333;
  color: #c06060;
}

.projects-modal-footer {
  padding: 11px 20px;
  border-top: 1px solid #252525;
  flex-shrink: 0;
}

.projects-quota {
  font-size: 11px;
  color: var(--text-faint);
}