/* ==========================================================================
   pinout.ninja — Precision Hardware Light Theme & Interactive Diagram Styles
   Palette: Crisp Slate Ink (#0F172A) on Technical Canvas (#F8FAFC) + Pure Cards (#FFFFFF)
   ========================================================================== */

:root {
  --bg-page: #f8fafc;
  --bg-card: #ffffff;
  --bg-subtle: #f1f5f9;
  --bg-code: #0f172a;
  --text-main: #0f172a;
  --text-secondary: #334155;
  --text-muted: #475569;
  --text-faint: #64748b;
  --border-subtle: #e2e8f0;
  --border-strong: #cbd5e1;
  --border-ink: #94a3b8;
  --accent: #0f172a;
  --accent-blue: #2563eb;
  --accent-blue-hover: #1d4ed8;
  --accent-blue-soft: #eff6ff;
  --ok-bg: #f0fdf4;
  --ok-border: #22c55e;
  --ok-text: #166534;
  --warn-bg: #fffbeb;
  --warn-border: #f59e0b;
  --warn-text: #92400e;
  --err-bg: #fef2f2;
  --err-border: #ef4444;
  --err-text: #991b1b;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow-pop: 0 12px 32px -4px rgba(15, 23, 42, 0.16), 0 4px 12px -2px rgba(15, 23, 42, 0.08);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

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

[hidden] {
  display: none !important;
}

html,
body {
  max-width: 100%;
  overflow-x: hidden;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text-main);
  background-color: var(--bg-page);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent-blue);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.mono {
  font-family: var(--font-mono);
}

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

.text-caution {
  color: var(--warn-text);
  font-weight: 500;
}

/* ==========================================================================
   Header, Brand & Smart Autocomplete Dropdown
   ========================================================================== */

.site-header {
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border-subtle);
  padding: 0.7rem 1.25rem;
  position: sticky;
  top: 0;
  z-index: 45;
}

.site-header-inner {
  max-width: 1440px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.48rem;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-main);
  text-decoration: none;
  letter-spacing: -0.03em;
}

.brand-logo:hover {
  text-decoration: none;
}

.brand-ninja-icon {
  flex-shrink: 0;
  display: block;
}

.brand-wordmark {
  color: var(--text-main);
}

.brand-wordmark span {
  color: var(--accent-blue);
}

.search-anchor,
.search-box-wrap {
  position: relative;
}

.search-box-wrap {
  flex: 1 1 280px;
  max-width: 460px;
}

.search-input {
  width: 100%;
  padding: 0.52rem 0.85rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  font-size: 0.92rem;
  font-family: var(--font-sans);
  background: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
  transition: border-color 120ms ease, box-shadow 120ms ease;
}

.search-input:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.14);
}

.search-dropdown {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
  max-height: 380px;
  overflow-y: auto;
  z-index: 70;
  padding: 0.3rem;
}

.search-empty {
  padding: 0.75rem 0.85rem;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.search-result-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.7rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid transparent;
}

.search-result-item.is-active,
.search-result-item:hover {
  background: var(--accent-blue-soft);
  border-color: #bfdbfe;
}

.search-result-item > .part-thumb-svg {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: block;
}

.search-result-body {
  flex: 1 1 0%;
  min-width: 0;
}

.search-result-top {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.search-result-name {
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--text-main);
}

.search-alias-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.08rem 0.38rem;
  border-radius: 4px;
  background: #fef3c7;
  border: 1px solid #f59e0b;
  color: #92400e;
}

.search-kind-badge {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.08rem 0.38rem;
  border-radius: 4px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.search-result-mfg {
  margin-left: auto;
  font-size: 0.76rem;
  color: var(--text-faint);
}

.search-result-summary {
  margin-top: 0.2rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.search-variant-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-top: 0.38rem;
}

.search-variant-pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.1rem 0.42rem;
  border-radius: 4px;
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  text-decoration: none;
}

.search-variant-pill.is-matched {
  background: var(--bg-card);
  border-color: var(--border-strong);
  color: var(--text-secondary);
}

.search-variant-pill:hover {
  background: var(--bg-card);
  border-color: var(--accent-blue);
  color: var(--accent-blue-hover);
  text-decoration: none;
}

.search-match-hl {
  background: transparent;
  padding: 0;
  color: var(--accent-blue-hover);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(37, 99, 235, 0.55);
  text-decoration-thickness: 1.5px;
  text-underline-offset: 2px;
}

.search-alias-badge .search-match-hl {
  color: #78350f;
  text-decoration-color: rgba(146, 64, 14, 0.65);
}

/* ==========================================================================
   Page Containers, Cards & Filter Toolbar
   ========================================================================== */

.page-main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.25rem;
}

.hero-section {
  max-width: 720px;
  margin: 2.5rem auto;
  text-align: center;
}

.hero-section h1 {
  font-size: 2.05rem;
  margin: 0 0 1.25rem;
  letter-spacing: -0.03em;
}

.hero-section .search-box-wrap {
  max-width: 580px;
  margin: 0 auto;
  text-align: left;
}

.hero-section .search-input {
  padding: 0.78rem 1rem;
  font-size: 1rem;
}

.part-card,
.onboard-card,
.part-header,
.diagram-viewport {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}

.onboard-card {
  border-radius: 10px;
  padding: 0.9rem 1rem;
}

.catalog-grid,
.onboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 260px), 1fr));
  gap: 0.9rem;
}

a.part-card,
.part-card {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
  color: var(--text-main);
  padding: 0.95rem 1.1rem;
  border-radius: 10px;
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

a.part-card:hover,
.part-card:hover {
  border-color: var(--border-ink);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.07);
  transform: translateY(-1px);
  text-decoration: none;
}

.part-thumb-svg {
  display: block;
  flex-shrink: 0;
  object-fit: contain;
}

.part-card > .part-thumb-svg {
  width: 68px;
  height: 68px;
  flex: 0 0 68px;
}

.part-card-title {
  font-weight: 700;
  font-size: 1.04rem;
  line-height: 1.3;
  color: var(--text-main);
  text-align: left;
  min-width: 0;
}

.catalog-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.9rem;
}

.catalog-section-header h2 {
  margin: 0;
  font-size: 1.15rem;
  letter-spacing: -0.015em;
}

.catalog-browse-link {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--accent-blue);
  text-decoration: none;
}

.catalog-browse-link:hover {
  color: var(--accent-blue-hover);
  text-decoration: underline;
}

.catalog-page-header {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 1.15rem 1.35rem;
  margin-bottom: 1.5rem;
}

.catalog-page-title-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.catalog-page-title {
  margin: 0;
  font-size: 1.55rem;
  letter-spacing: -0.02em;
}

.catalog-count-pill {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.14rem 0.52rem;
  border-radius: 999px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.catalog-page-subtitle {
  margin: 0.4rem 0 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.catalog-jump-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  margin-top: 0.85rem;
}

.catalog-jump-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.68rem;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.catalog-jump-pill:hover {
  background: var(--accent-blue-soft);
  border-color: #bfdbfe;
  color: var(--accent-blue-hover);
  text-decoration: none;
}

.catalog-jump-count {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-faint);
}

.catalog-group-section + .catalog-group-section {
  margin-top: 2rem;
}

.catalog-directory-grid {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
}

.catalog-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  box-shadow: var(--shadow-sm);
  padding: 0.95rem 1.05rem;
  gap: 0.7rem;
  transition: border-color 140ms ease, box-shadow 140ms ease, transform 140ms ease;
}

.catalog-card:hover {
  border-color: var(--border-ink);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.07);
  transform: translateY(-1px);
}

.catalog-card-main {
  display: flex;
  align-items: flex-start;
  gap: 0.95rem;
  color: var(--text-main);
  text-decoration: none;
  min-width: 0;
}

.catalog-card-main:hover {
  text-decoration: none;
}

.catalog-card-main > .part-thumb-svg {
  width: 60px;
  height: 60px;
  flex: 0 0 60px;
  margin-top: 0.1rem;
}

.catalog-card-info {
  flex: 1 1 0%;
  min-width: 0;
}

.catalog-card-title {
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--text-main);
}

.catalog-card-main:hover .catalog-card-title {
  color: var(--accent-blue);
}

.catalog-card-meta {
  margin-top: 0.16rem;
  font-size: 0.76rem;
  color: var(--text-faint);
  font-weight: 500;
}

.catalog-card-aliases {
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.catalog-card-summary {
  margin: 0.32rem 0 0;
  font-size: 0.81rem;
  line-height: 1.44;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.catalog-card-variants {
  display: flex;
  flex-wrap: wrap;
  gap: 0.32rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border-subtle);
}

.catalog-variant-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.12rem 0.46rem;
  border-radius: 4px;
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
  text-decoration: none;
  transition: background-color 110ms ease, border-color 110ms ease, color 110ms ease;
}

.catalog-variant-link:hover {
  background: var(--accent-blue-soft);
  border-color: #93c5fd;
  color: var(--accent-blue-hover);
  text-decoration: none;
}

.site-footer {
  max-width: 1440px;
  margin: 2.5rem auto 1.5rem;
  padding: 1rem 1.25rem 0;
  border-top: 1px solid var(--border-subtle);
  color: var(--text-muted);
  font-size: 0.82rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}

.site-footer-links {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
}

.site-footer-links a {
  color: var(--text-muted);
  font-weight: 500;
  text-decoration: none;
}

.site-footer-links a:hover {
  color: var(--accent-blue);
  text-decoration: underline;
}

/* ==========================================================================
   Part Header, Upper-Right Variant Tabs & Split Header Body
   ========================================================================== */

.part-header {
  position: relative;
  padding: 1.15rem 1.35rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
}

.part-header-top {
  position: relative;
  display: flex;
  flex-wrap: nowrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.part-title-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
  flex: 0 1 auto;
}

.part-title {
  margin: 0;
  font-size: 1.5rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
  overflow-wrap: break-word;
}

.part-kind-badge {
  font-size: 0.72rem;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.14rem 0.48rem;
  border-radius: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.part-review-indicators {
  display: inline-flex;
  align-items: center;
  gap: 0.28rem;
  flex-shrink: 0;
}

.part-review-badge {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 5px;
  cursor: default;
  user-select: none;
  outline: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.part-review-badge svg {
  display: block;
  flex-shrink: 0;
}

.part-review-badge.is-unreviewed {
  background: var(--bg-page);
  border: 1px dashed var(--border-strong);
  color: var(--text-faint);
}

.part-review-badge.is-unreviewed:hover,
.part-review-badge.is-unreviewed:focus-visible {
  border-color: var(--text-muted);
  color: var(--text-secondary);
}

.part-review-badge.review-human.is-reviewed {
  background: #ecfdf5;
  border: 1px solid #6ee7b7;
  color: #059669;
}

.part-review-badge.review-human.is-reviewed:hover,
.part-review-badge.review-human.is-reviewed:focus-visible {
  background: #d1fae5;
  border-color: #34d399;
}

.part-review-badge.review-ai.is-reviewed {
  background: var(--accent-blue-soft);
  border: 1px solid #93c5fd;
  color: var(--accent-blue);
}

.part-review-badge.review-ai.is-reviewed:hover,
.part-review-badge.review-ai.is-reviewed:focus-visible {
  background: #dbeafe;
  border-color: #60a5fa;
}

.part-review-badge:focus-visible {
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.25);
}

.part-review-badge::before,
.part-review-badge::after {
  display: none;
  position: absolute;
  pointer-events: none;
  z-index: 45;
}

.part-review-badge::after {
  content: attr(data-tooltip);
  top: calc(100% + 7px);
  left: 50%;
  transform: translateX(-50%);
  padding: 0.3rem 0.58rem;
  border-radius: 6px;
  background: #0f172a;
  color: #f8fafc;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.3;
  letter-spacing: 0;
  white-space: nowrap;
  box-shadow: var(--shadow-md);
}

.part-review-badge::before {
  content: "";
  top: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-bottom-color: #0f172a;
  border-top-width: 0;
}

.part-review-badge:hover::before,
.part-review-badge:hover::after,
.part-review-badge:focus-visible::before,
.part-review-badge:focus-visible::after {
  display: block;
}

@media (max-width: 640px) {
  .part-review-badge::after {
    left: -36px;
    transform: none;
  }
}

.part-manufacturer {
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.part-datasheet-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--accent-blue);
  white-space: nowrap;
}

.part-variant-tabs {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0.3rem;
  margin-top: -1.15rem;
  flex-shrink: 0;
}

.variant-tabs-visible {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0.3rem;
  white-space: nowrap;
}

.variant-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.28rem;
  padding: 0.4rem 0.76rem;
  border: 1px solid var(--border-subtle);
  border-top: none;
  border-radius: 0 0 8px 8px;
  background: var(--bg-page);
  color: var(--text-faint);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  line-height: 1.25;
  white-space: nowrap;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 110ms ease, color 110ms ease, border-color 110ms ease;
}

.variant-tab:hover {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border-color: var(--border-strong);
  text-decoration: none;
}

.variant-tab.is-active,
.variant-tab.is-active:hover,
.variant-more-btn.has-active,
.variant-more-btn.has-active:hover {
  background: #e2e8f0;
  color: var(--text-main);
  border-color: var(--border-strong);
  font-weight: 600;
  text-decoration: none;
}

.variant-more-wrap {
  position: relative;
  display: inline-flex;
  align-items: stretch;
}

.variant-more-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  min-width: 185px;
  max-width: min(280px, calc(100vw - 24px));
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-pop);
  padding: 0.3rem;
  z-index: 65;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.variant-more-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.42rem 0.65rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-main);
  text-decoration: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.variant-more-item:hover {
  background: var(--bg-subtle);
  text-decoration: none;
}

.variant-more-item.is-active {
  background: #e2e8f0;
  color: var(--text-main);
  font-weight: 600;
}

.part-header-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin-top: 0.75rem;
}

.part-description-col {
  min-width: 0;
}

.part-description {
  font-family: var(--font-sans);
  font-size: 0.855rem;
  line-height: 1.56;
  letter-spacing: -0.004em;
  color: var(--text-muted);
  margin: 0;
}

.part-related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.38rem;
  margin-top: 0.65rem;
  font-size: 0.78rem;
}

.related-label {
  color: var(--text-faint);
  font-weight: 600;
  font-size: 0.76rem;
}

.part-related-links a + .related-label,
.part-related-links .related-meta-badge + .related-label {
  margin-left: 0.5rem;
}

.related-meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.1rem 0.46rem;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 500;
  line-height: 1.35;
}

.related-chip-link,
.related-board-link {
  display: inline-flex;
  align-items: center;
  padding: 0.12rem 0.5rem;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  color: var(--accent-blue);
  font-size: 0.77rem;
  font-weight: 500;
  line-height: 1.35;
  text-decoration: none;
  transition: background-color 120ms ease, border-color 120ms ease, color 120ms ease;
}

.related-chip-link:hover,
.related-board-link:hover {
  background: var(--accent-blue-soft);
  border-color: #bfdbfe;
  color: var(--accent-blue-hover);
  text-decoration: none;
}

.part-highlights-col {
  min-width: 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-subtle);
}

@media (min-width: 900px) {
  .part-header-body {
    display: grid;
    grid-template-columns: minmax(0, 1.85fr) minmax(290px, 1fr);
    column-gap: 2.25rem;
    row-gap: 1rem;
    align-items: stretch;
    margin-top: 0.75rem;
  }

  .part-header-body:not(:has(.part-highlights-col)) {
    grid-template-columns: minmax(0, 1fr);
  }

  .part-highlights-col {
    padding-top: 0;
    border-top: none;
    border-left: 1px solid var(--border-subtle);
    padding-left: 2rem;
  }
}

.part-highlights {
  display: flex;
  flex-wrap: wrap;
  gap: 0.42rem;
  align-content: flex-start;
}

.highlight-chip {
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.35;
  padding: 0.22rem 0.58rem;
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

/* ==========================================================================
   Merged Filter Bar + Diagram Box (.diagram-box)
   ========================================================================== */

.diagram-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.filter-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  padding: 0.65rem 0.9rem;
  margin-bottom: 1rem;
  box-shadow: var(--shadow-sm);
}

.diagram-box > .filter-toolbar {
  margin: 0;
  border: none;
  border-bottom: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: none;
}

.diagram-box > .diagram-viewport {
  border: none;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  box-shadow: none;
}

.filter-toolbar #pin-filter-input {
  flex: 1 1 220px;
  max-width: 320px;
  padding: 0.36rem 0.72rem;
  font-size: 0.85rem;
}

.category-filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem;
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin-left: auto;
}

.btn-icon {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  display: inline-block;
}

.variant-pill,
.cat-filter-pill,
.toolbar-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.3rem;
  padding: 0.32rem 0.68rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-main);
  font-size: 0.81rem;
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  text-decoration: none;
  transition: background-color 110ms ease, border-color 110ms ease, box-shadow 110ms ease;
}

.variant-pill:hover,
.toolbar-btn:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-ink);
  text-decoration: none;
}

.cat-filter-pill:hover {
  filter: brightness(0.97);
}

.toolbar-btn:disabled,
.toolbar-btn.is-disabled {
  opacity: 0.45;
  cursor: default;
}

.variant-pill.is-active,
.variant-pill.is-active:hover,
.toolbar-btn.is-active,
.toolbar-btn.is-active:hover:not(:disabled) {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.cat-filter-pill.is-active {
  box-shadow: 0 0 0 2px var(--accent);
  font-weight: 700;
}

/* ==========================================================================
   Semantic Category Palette (Matches contracts.py CATEGORY_PALETTE 1:1)
   ========================================================================== */

.html-fn-pill,
.fn-badge {
  display: inline-block;
  padding: 0.12rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  line-height: 1.35;
}

.html-fn-pill {
  margin: 0.1rem 0.15rem 0.1rem 0;
}

.cat-power,
.html-fn-pill.cat-power,
.fn-badge.cat-power,
.cat-filter-pill.cat-power {
  background-color: #fee2e2;
  border-color: #ef4444;
  color: #991b1b;
}

.cat-ground,
.html-fn-pill.cat-ground,
.fn-badge.cat-ground,
.cat-filter-pill.cat-ground {
  background-color: #e2e8f0;
  border-color: #475569;
  color: #0f172a;
}

.cat-gpio,
.html-fn-pill.cat-gpio,
.fn-badge.cat-gpio,
.cat-filter-pill.cat-gpio {
  background-color: #dcfce7;
  border-color: #22c55e;
  color: #166534;
}

.cat-spi,
.html-fn-pill.cat-spi,
.fn-badge.cat-spi,
.cat-filter-pill.cat-spi {
  background-color: #f3e8ff;
  border-color: #a855f7;
  color: #6b21a8;
}

.cat-uart,
.html-fn-pill.cat-uart,
.fn-badge.cat-uart,
.cat-filter-pill.cat-uart {
  background-color: #fef3c7;
  border-color: #f59e0b;
  color: #92400e;
}

.cat-i2c,
.html-fn-pill.cat-i2c,
.fn-badge.cat-i2c,
.cat-filter-pill.cat-i2c {
  background-color: #dbeafe;
  border-color: #3b82f6;
  color: #1e40af;
}

.cat-pwm,
.html-fn-pill.cat-pwm,
.fn-badge.cat-pwm,
.cat-filter-pill.cat-pwm {
  background-color: #fce7f3;
  border-color: #ec4899;
  color: #9d174d;
}

.cat-adc,
.html-fn-pill.cat-adc,
.fn-badge.cat-adc,
.cat-filter-pill.cat-adc {
  background-color: #ccfbf1;
  border-color: #14b8a6;
  color: #115e59;
}

.cat-pio,
.html-fn-pill.cat-pio,
.fn-badge.cat-pio,
.cat-filter-pill.cat-pio {
  background-color: #e0e7ff;
  border-color: #6366f1;
  color: #3730a3;
}

.cat-usb,
.html-fn-pill.cat-usb,
.fn-badge.cat-usb,
.cat-filter-pill.cat-usb {
  background-color: #cffafe;
  border-color: #06b6d4;
  color: #155e75;
}

.cat-clock,
.html-fn-pill.cat-clock,
.fn-badge.cat-clock,
.cat-filter-pill.cat-clock {
  background-color: #f1f5f9;
  border-color: #64748b;
  color: #334155;
}

.cat-qspi,
.html-fn-pill.cat-qspi,
.fn-badge.cat-qspi,
.cat-filter-pill.cat-qspi {
  background-color: #ede9fe;
  border-color: #8b5cf6;
  color: #5b21b6;
}

.cat-debug,
.html-fn-pill.cat-debug,
.fn-badge.cat-debug,
.cat-filter-pill.cat-debug {
  background-color: #ffedd5;
  border-color: #f97316;
  color: #9a3412;
}

.cat-system,
.html-fn-pill.cat-system,
.fn-badge.cat-system,
.cat-filter-pill.cat-system {
  background-color: #e5e7eb;
  border-color: #6b7280;
  color: #1f2937;
}

/* ==========================================================================
   SVG Artwork Palette (All ALLOWED_ARTWORK_CLASSES from contracts.py)
   ========================================================================== */

.pcb-board,
.pcb-Board {
  fill: #156534;
  stroke: #0f3f23;
  stroke-width: 1.6;
}

.pcb-cutout:not([fill]) {
  fill: #334155;
  stroke: #475569;
  stroke-width: 1.2;
}

.pcb-hole {
  fill: #ffffff;
  stroke: #14532d;
  stroke-width: 1;
}

.pcb-hole-ring {
  fill: #eab308;
  stroke: #a16207;
  stroke-width: 1;
}

.pcb-silkscreen {
  fill: #f8fafc;
  font-family: var(--font-mono);
  font-weight: 600;
  letter-spacing: 0.02em;
  pointer-events: none;
  user-select: none;
}

.pcb-silkscreen-dim:not([fill="none"]) {
  fill: #475569;
}

.pcb-silkscreen-dim[fill="none"] {
  stroke: #475569;
}

.pcb-copper {
  fill: #d97706;
  stroke: #92400e;
  stroke-width: 1;
}

.pcb-gold,
.pad-gold {
  fill: #facc15;
  stroke: #ca8a04;
  stroke-width: 1;
}

.landmark-usb-shell {
  fill: #94a3b8;
  stroke: #475569;
  stroke-width: 1.2;
}

.landmark-usb {
  fill: #cbd5e1;
  stroke: #64748b;
  stroke-width: 1;
}

.landmark-ic {
  fill: #1e293b;
  stroke: #0f172a;
  stroke-width: 1.5;
}

.landmark-ic-dot {
  fill: #cbd5e1;
}

text.landmark-ic-text,
g.landmark-ic-text text {
  fill: #f8fafc;
  font-family: var(--font-mono);
  font-weight: 600;
  pointer-events: none;
  user-select: none;
}

.landmark-button {
  fill: #cbd5e1;
  stroke: #475569;
  stroke-width: 1.1;
}

.landmark-button-cap {
  fill: #f8fafc;
  stroke: #475569;
  stroke-width: 1.1;
}

.landmark-led {
  fill: #e2e8f0;
  stroke: #475569;
  stroke-width: 1;
}

.landmark-led-lens {
  fill: #4ade80;
  stroke: #16a34a;
  stroke-width: 0.9;
}

.landmark-inductor {
  fill: #334155;
  stroke: #0f172a;
  stroke-width: 1.2;
}

.landmark-shield {
  fill: #cbd5e1;
  stroke: #64748b;
  stroke-width: 1.4;
}

.landmark-header-housing {
  fill: #1e293b;
  stroke: #0f172a;
  stroke-width: 1.2;
}

.pad-castellated {
  fill: #facc15;
  stroke: #b45309;
  stroke-width: 1.1;
}

.pad-through-hole:not([fill]) {
  fill: #eab308;
  stroke: #a16207;
  stroke-width: 1;
}

.pad-smd:not([fill]) {
  fill: #cbd5e1;
  stroke: #64748b;
  stroke-width: 1;
}

.pad-debug {
  fill: #fde047;
  stroke: #b45309;
  stroke-width: 1.1;
}

.phys-pad {
  cursor: pointer;
  transition: opacity 120ms ease, filter 120ms ease, stroke-width 120ms ease;
}

/* ==========================================================================
   Interactive SVG Callouts, Highlighting, Filtering & Solver Overlay
   ========================================================================== */

.diagram-viewport {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 1rem;
  overflow-x: auto;
}

.pinout-svg {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 auto;
  user-select: none;
}

svg.pinout-svg:not(.is-full-width) .artwork-full,
svg.pinout-svg:not(.is-full-width) .leaders-full {
  display: none;
}

svg.pinout-svg.is-full-width .artwork-compact,
svg.pinout-svg.is-full-width .leaders-compact {
  display: none;
}

.tear-break-lines[data-tear-toggle] {
  cursor: pointer;
}

.tear-break-lines[data-tear-toggle]:hover polyline.tear-edge-stroke {
  stroke: var(--accent-blue);
  stroke-width: 2.3;
}

.pin-callout .pin-main-badge,
.pin-callout .fn-more-pill,
.pin-callout .pin-warning-trigger {
  cursor: pointer;
}

.pin-pills-full {
  display: none;
}

.pin-callout.is-expanded .pin-pills-compact,
svg.is-all-expanded .pin-pills-compact,
.pin-callout.is-filter-revealed .pin-pills-compact {
  display: none;
}

.pin-callout.is-expanded .pin-pills-full,
svg.is-all-expanded .pin-pills-full,
.pin-callout.is-filter-revealed .pin-pills-full {
  display: inline;
}

/* Dimming when filtering */
.pin-callout.is-dimmed,
.leader-line.is-dimmed,
.phys-pad.is-dimmed {
  opacity: 0.2;
}

tr[data-pin-row].is-dimmed,
.onboard-card.is-dimmed {
  opacity: 0.32;
}

/* Cross-Highlight on Hover */
.pin-callout.is-highlighted .pin-badge-bg {
  stroke: var(--accent-blue);
  stroke-width: 2;
  fill: #eff6ff;
}

.phys-pad.is-highlighted {
  stroke: #2563eb !important;
  stroke-width: 2.4 !important;
  filter: drop-shadow(0 0 4px rgba(37, 99, 235, 0.55));
}

.leader-line.is-highlighted {
  stroke-width: 2.8 !important;
  opacity: 1 !important;
}

#pin-reference-table tr[data-pin-row].is-highlighted {
  background-color: #eff6ff;
}

.fn-more-pill:hover rect {
  fill: #cbd5e1;
  stroke: #334155;
}

/* Solver Mode SVG Overlay */
.pin-solver-slot {
  display: none;
}

svg.is-solver-mode .pin-pills-compact,
svg.is-solver-mode .pin-pills-full {
  display: none !important;
}

svg.is-solver-mode .pin-solver-slot {
  display: inline;
}

svg.is-solver-mode .pin-callout.is-solver-unassigned,
svg.is-solver-mode .leader-line.is-solver-unassigned,
svg.is-solver-mode .phys-pad.is-solver-unassigned {
  opacity: 0.36;
}

svg.is-solver-mode .pin-callout[data-electrical-type="power"].is-solver-unassigned,
svg.is-solver-mode .pin-callout[data-electrical-type="ground"].is-solver-unassigned {
  opacity: 0.62;
}

svg.is-solver-mode .phys-pad.is-solver-assigned {
  stroke: #16a34a !important;
  stroke-width: 2.2 !important;
}

svg.is-solver-mode .leader-line.is-solver-assigned {
  stroke-width: 2.4 !important;
}

#pin-reference-table tr[data-pin-row].is-solver-assigned {
  background-color: #f0fdf4;
}

/* SVG Solver Pill category colors */
.solver-pill rect {
  stroke-width: 1.4;
}
.solver-pill.cat-uart rect { fill: #fef3c7; stroke: #f59e0b; }
.solver-pill.cat-uart text { fill: #92400e; }
.solver-pill.cat-spi rect { fill: #f3e8ff; stroke: #a855f7; }
.solver-pill.cat-spi text { fill: #6b21a8; }
.solver-pill.cat-i2c rect { fill: #dbeafe; stroke: #3b82f6; }
.solver-pill.cat-i2c text { fill: #1e40af; }
.solver-pill.cat-pwm rect { fill: #fce7f3; stroke: #ec4899; }
.solver-pill.cat-pwm text { fill: #9d174d; }
.solver-pill.cat-adc rect { fill: #ccfbf1; stroke: #14b8a6; }
.solver-pill.cat-adc text { fill: #115e59; }
.solver-pill.cat-pio rect { fill: #e0e7ff; stroke: #6366f1; }
.solver-pill.cat-pio text { fill: #3730a3; }
.solver-pill.cat-usb rect { fill: #cffafe; stroke: #06b6d4; }
.solver-pill.cat-usb text { fill: #155e75; }
.solver-pill.cat-qspi rect { fill: #ede9fe; stroke: #8b5cf6; }
.solver-pill.cat-qspi text { fill: #5b21b6; }
.solver-pill.cat-gpio rect { fill: #dcfce7; stroke: #22c55e; }
.solver-pill.cat-gpio text { fill: #166534; }
.solver-pill.cat-system rect { fill: #e5e7eb; stroke: #6b7280; stroke-dasharray: 3 2; }
.solver-pill.cat-system text { fill: #374151; }

/* ==========================================================================
   Pin Detail & Warning Popover (#pin-popover)
   ========================================================================== */

.pin-popover {
  position: fixed;
  z-index: 85;
  width: 340px;
  max-width: calc(100vw - 24px);
  max-height: calc(100vh - 24px);
  overflow-y: auto;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 0.85rem 0.95rem;
  box-shadow: var(--shadow-pop);
  font-size: 0.84rem;
}

.popover-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.5rem;
  padding-bottom: 0.55rem;
  border-bottom: 1px solid var(--border-subtle);
}

.popover-title-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.38rem;
}

.popover-pin-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  background: #1e293b;
  color: #f8fafc;
}

.popover-pin-label {
  font-family: var(--font-mono);
  font-size: 0.96rem;
  color: var(--text-main);
}

.popover-pad-chip,
.popover-elec-badge,
.cap-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.08rem 0.38rem;
  border-radius: 4px;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  color: var(--text-secondary);
}

.popover-close {
  border: none;
  background: transparent;
  color: var(--text-faint);
  font-size: 1.2rem;
  line-height: 1;
  padding: 0 0.2rem;
  cursor: pointer;
}

.popover-close:hover {
  color: var(--text-main);
}

.popover-desc {
  margin: 0.55rem 0 0;
  color: var(--text-secondary);
}

.popover-section {
  margin-top: 0.65rem;
}

.popover-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-faint);
  margin-bottom: 0.3rem;
}

.popover-caps,
.popover-fns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.28rem;
}

.popover-warning-card {
  border-radius: var(--radius-sm);
  padding: 0.48rem 0.6rem;
  margin-bottom: 0.35rem;
  border: 1px solid var(--warn-border);
  background: var(--warn-bg);
}

.popover-warning-card.sev-danger {
  border-color: var(--err-border);
  background: var(--err-bg);
}

.popover-warning-card.sev-info {
  border-color: #60a5fa;
  background: #eff6ff;
}

.popover-warning-head {
  display: flex;
  align-items: center;
  gap: 0.38rem;
}

.sev-pill {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  padding: 0.06rem 0.34rem;
  border-radius: 3px;
  background: #f59e0b;
  color: #ffffff;
}

.sev-pill.sev-danger {
  background: #dc2626;
}

.sev-pill.sev-info {
  background: #2563eb;
}

.popover-warning-details {
  margin: 0.28rem 0 0;
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.popover-warning-ref,
.table-warning-ref {
  margin: 0.2rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  color: var(--text-muted);
}

.popover-actions {
  margin-top: 0.7rem;
  padding-top: 0.55rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: flex-end;
}

/* ==========================================================================
   Interactive Pin Configuration Solver (#solver-app)
   ========================================================================== */

.solver-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.1rem 1.25rem;
  box-shadow: var(--shadow-sm);
}

.solver-empty-state {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.1rem;
}

.solver-muted {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.solver-topbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 0.95rem;
}

.solver-status-banner {
  font-size: 0.86rem;
  font-weight: 600;
  padding: 0.38rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-page);
  color: var(--text-secondary);
}

.solver-status-banner.is-ok {
  background: var(--ok-bg);
  border-color: var(--ok-border);
  color: var(--ok-text);
}

.solver-status-banner.is-error {
  background: var(--err-bg);
  border-color: var(--err-border);
  color: var(--err-text);
}

.solver-topbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.btn-primary,
.btn-subtle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 110ms ease, border-color 110ms ease;
}

.btn-sm {
  font-size: 0.8rem;
  padding: 0.34rem 0.7rem;
}

.btn-xs {
  font-size: 0.75rem;
  padding: 0.24rem 0.55rem;
}

.btn-primary {
  background: var(--accent);
  border: 1px solid var(--accent);
  color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
  background: #1e293b;
}

.btn-subtle {
  background: var(--bg-page);
  border: 1px solid var(--border-strong);
  color: var(--text-main);
}

.btn-subtle:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-ink);
}

.btn-primary:disabled,
.btn-subtle:disabled {
  opacity: 0.45;
  cursor: default;
}

.solver-kinds-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 155px), 1fr));
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.solver-kind-card {
  background: var(--bg-page);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.65rem 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.solver-kind-card.is-active {
  background: #ffffff;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 1px rgba(37, 99, 235, 0.25);
}

.solver-kind-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.3rem;
}

.solver-kind-name {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.86rem;
}

.solver-kind-max {
  font-size: 0.72rem;
  color: var(--text-faint);
}

.solver-stepper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.stepper-btn {
  width: 34px;
  height: 28px;
  border: none;
  background: transparent;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  cursor: pointer;
}

.stepper-btn:hover:not(:disabled) {
  background: var(--bg-subtle);
}

.stepper-btn:disabled {
  opacity: 0.35;
  cursor: default;
}

.stepper-value {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  min-width: 28px;
  text-align: center;
}

.solver-opt-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  font-size: 0.74rem;
  color: var(--text-muted);
  cursor: pointer;
}

.solver-constraints-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 260px), 1fr));
  gap: 0.85rem;
  padding-top: 0.85rem;
  border-top: 1px solid var(--border-subtle);
  align-items: start;
}

.solver-field-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.solver-inline-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.38rem;
}

.solver-select {
  flex: 1 1 110px;
  min-width: 0;
  max-width: 100%;
  padding: 0.34rem 0.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-main);
}

.solver-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
}

.solver-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.76rem;
  font-family: var(--font-mono);
  padding: 0.16rem 0.48rem;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: var(--bg-subtle);
}

.solver-chip.chip-lock {
  background: #eff6ff;
  border-color: #93c5fd;
  color: #1e3a8a;
}

.solver-chip.chip-excl {
  background: #f1f5f9;
  border-color: #94a3b8;
  color: #334155;
}

.chip-remove {
  border: none;
  background: transparent;
  font-size: 0.95rem;
  line-height: 1;
  padding: 0;
  cursor: pointer;
  color: inherit;
}

.solver-soft-toggle-wrap {
  display: flex;
  align-items: center;
  padding-top: 1.2rem;
}

.solver-checkbox-label {
  display: inline-flex;
  align-items: flex-start;
  gap: 0.45rem;
  font-size: 0.83rem;
  color: var(--text-secondary);
  cursor: pointer;
}

/* Alerts & Output Table / Code Exporter */
.solver-alert {
  margin-top: 0.9rem;
  padding: 0.75rem 0.95rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
}

.solver-alert.alert-error {
  background: var(--err-bg);
  border: 1px solid var(--err-border);
  color: var(--err-text);
}

.solver-alert.alert-warning {
  background: var(--warn-bg);
  border: 1px solid var(--warn-border);
  color: var(--warn-text);
}

.solver-alert-title {
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.solver-reason-list {
  margin: 0 0 0.45rem;
  padding-left: 1.2rem;
}

.solver-output-area {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.solver-table-heading {
  font-size: 0.95rem;
  margin: 0 0 0.5rem;
}

.table-scroll {
  overflow-x: auto;
  max-width: 100%;
}

.solver-summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.83rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-subtle);
}

.solver-summary-table th,
.solver-summary-table td {
  padding: 0.48rem 0.65rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
  vertical-align: middle;
}

.solver-summary-table th {
  background: var(--bg-subtle);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Interactive Pin Assignment Planner Table */
.solver-planner-table {
  margin-bottom: 0;
}

.planner-fn-cell {
  white-space: nowrap;
}

.planner-role-tag {
  display: inline-block;
  margin-left: 0.3rem;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  color: var(--text-faint);
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: 4px;
  padding: 0.05rem 0.34rem;
  vertical-align: middle;
}

.solver-pin-select {
  min-width: 155px;
  max-width: 100%;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: var(--bg-page);
  color: var(--text-main);
  font-family: var(--font-mono);
  font-size: 0.79rem;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 110ms ease, box-shadow 110ms ease;
}

.solver-pin-select:focus {
  outline: none;
  border-color: var(--accent-blue);
  box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.16);
}

.solver-pin-select.is-conflict {
  border-color: var(--err-border);
  background: var(--err-bg);
  color: var(--err-text);
}

.planner-pad-cell {
  white-space: nowrap;
  font-size: 0.8rem;
}

.planner-lock-cell {
  width: 48px;
  text-align: center;
  white-space: nowrap;
}

.solver-planner-table th:nth-child(4) {
  text-align: center;
}

.pin-lock-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 28px;
  padding: 0;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-page);
  color: var(--text-muted);
  cursor: pointer;
  transition: background-color 110ms ease, border-color 110ms ease, color 110ms ease;
}

.pin-lock-btn:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--border-ink);
  color: var(--text-main);
}

.pin-lock-btn.is-locked {
  background: var(--accent-blue-soft);
  border-color: var(--accent-blue);
  color: var(--accent-blue);
}

.pin-lock-btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.lock-icon {
  display: block;
  flex-shrink: 0;
}

.print-lock-indicator {
  display: none;
}

.planner-row.is-conflict-row {
  background: #fff5f5;
}

.planner-warn-msg,
.reserved-warn-item {
  display: flex;
  align-items: flex-start;
  gap: 0.35rem;
  font-size: 0.79rem;
  line-height: 1.38;
  color: var(--warn-text);
}

.planner-warn-msg + .planner-warn-msg,
.reserved-warn-item + .reserved-warn-item {
  margin-top: 0.2rem;
}

.planner-warn-msg.sev-danger,
.reserved-warn-item.sev-danger {
  color: var(--err-text);
}

.planner-warn-msg.sev-info,
.reserved-warn-item.sev-info {
  color: #1e40af;
}

.planner-warn-icon {
  flex-shrink: 0;
  margin-top: 0.12rem;
}

.planner-conflict-msg {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.35rem;
  color: var(--err-text);
  font-size: 0.8rem;
  font-weight: 500;
}

.conflict-badge {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.06rem 0.34rem;
  border-radius: 3px;
  background: #dc2626;
  color: #ffffff;
  white-space: nowrap;
}

/* Prepopulated Reserved / Excluded Pins Section */
.solver-reserved-section {
  margin-top: 1.1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

.solver-reserved-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.6rem;
}

.solver-reserved-header .solver-table-heading {
  margin: 0;
}

.solver-reserve-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  max-width: 100%;
}

.solver-reserve-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
}

.solver-reserved-table {
  margin-bottom: 0;
}

.solver-reserved-table th:last-child,
.reserved-action-col {
  width: 84px;
  text-align: right;
  white-space: nowrap;
}

.solver-reserved-empty {
  padding: 0.4rem 0;
}

.solver-export-area {
  margin-top: 1.1rem;
}

.solver-export-box {
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.solver-export-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.5rem 0.7rem;
  background: var(--bg-subtle);
  border-bottom: 1px solid var(--border-strong);
}

.solver-export-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.solver-export-tab {
  border: 1px solid transparent;
  background: transparent;
  padding: 0.28rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
}

.solver-export-tab.is-active {
  background: var(--bg-card);
  border-color: var(--border-strong);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.solver-export-actions {
  display: flex;
  gap: 0.35rem;
}

.solver-code-pre {
  margin: 0;
  padding: 0.85rem 1rem;
  background: var(--bg-code);
  color: #f8fafc;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.55;
  overflow-x: auto;
  max-width: 100%;
}

/* Print-only warning legend stays hidden on screen */
.print-warning-legend {
  display: none;
}

/* ==========================================================================
   Part Sections & Desktop Full Pin Reference Table
   ========================================================================== */

.mobile-tabs {
  display: none;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.solver-section,
.onboard-resources-section,
.pin-table-section {
  margin-top: 1.5rem;
}

.pin-reference-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 10px;
  overflow: hidden;
  font-size: 0.875rem;
}

.pin-reference-table th,
.pin-reference-table td {
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border-subtle);
  text-align: left;
  vertical-align: top;
}

.pin-reference-table th {
  background: var(--bg-subtle);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.table-warning-title {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.warning-triangle-icon {
  flex-shrink: 0;
  vertical-align: middle;
}

/* ==========================================================================
   Responsive Tablet & Mobile Bench-Lookup Layout (<768px)
   ========================================================================== */

@media (max-width: 767px) {
  .site-header {
    padding: 0.6rem 0.85rem;
  }

  .page-main {
    padding: 0.75rem;
  }

  .part-header,
  .solver-panel {
    padding: 0.85rem;
  }

  .part-title {
    font-size: 1.25rem;
  }

  .part-variant-tabs {
    margin-top: -0.85rem;
  }

  .variant-tab {
    padding: 0.34rem 0.6rem;
    font-size: 0.74rem;
  }

  .filter-toolbar {
    padding: 0.55rem 0.65rem;
  }

  .filter-toolbar #pin-filter-input {
    max-width: 100% !important;
    flex: 1 1 100% !important;
  }

  .toolbar-actions {
    margin-left: 0 !important;
    width: 100%;
  }

  .mobile-tabs {
    display: flex;
    gap: 0.45rem;
    margin-bottom: 0.75rem;
  }

  .mobile-tabs .toolbar-btn {
    flex: 1 1 0;
    padding: 0.48rem 0.7rem;
    font-weight: 600;
  }

  /* Default mobile view shows quick Pin Table while keeping Filter Bar directly above it */
  body.page-part[data-mobile-tab="table"] #diagram-section {
    display: block;
  }

  body.page-part[data-mobile-tab="table"] #diagram-viewport {
    display: none;
  }

  body.page-part[data-mobile-tab="table"] .diagram-box > .filter-toolbar {
    border-bottom: none;
    border-radius: var(--radius-lg);
  }

  body.page-part[data-mobile-tab="table"] #pin-table-section {
    display: block;
    margin-top: 0.75rem;
  }

  body.page-part[data-mobile-tab="diagram"] #diagram-section {
    display: block;
  }

  body.page-part[data-mobile-tab="diagram"] #diagram-viewport {
    display: block;
  }

  body.page-part[data-mobile-tab="diagram"] #pin-table-section {
    display: none;
  }

  #diagram-viewport {
    padding: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  #diagram-viewport .pinout-svg {
    min-width: 640px;
  }

  .solver-soft-toggle-wrap {
    padding-top: 0.25rem;
  }

  /* Responsive mobile card layout for Full Pin Reference Table (zero squished columns) */
  .pin-reference-table {
    display: block;
    border: none;
    background: transparent;
  }

  .pin-reference-table thead {
    display: none;
  }

  .pin-reference-table tbody {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
  }

  .pin-reference-table tbody tr {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.35rem 0.6rem;
    padding: 0.65rem 0.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
  }

  .pin-reference-table tbody td {
    padding: 0;
    border: none;
  }

  .pin-reference-table tbody td:nth-child(4),
  .pin-reference-table tbody td:nth-child(5) {
    grid-column: 1 / -1;
  }

  .pin-reference-table tbody td:nth-child(5):empty {
    display: none;
  }
}