:root {
  --color-primary: #0066cc;
  --color-primary-focus: #0071e3;
  --color-on-primary: #ffffff;
  --color-ink: #1d1d1f;
  --color-ink-muted-80: #333333;
  --color-ink-muted-48: #7a7a7a;
  --color-canvas: #ffffff;
  --color-canvas-parchment: #f5f5f7;
  --color-surface-pearl: #fafafc;
  --color-hairline: #e0e0e0;
  --color-divider-soft: #f0f0f0;
  --color-success: #1d7d33;
  --color-danger: #d70015;
  --color-overlay-scrim: rgba(29, 29, 31, 0.08);
  --color-sheet-elevation: rgba(29, 29, 31, 0.16);
  --color-topbar: rgba(255, 255, 255, 0.78);
  --color-hero-wash: rgba(247, 248, 250, 0.18);
  --color-glass: rgba(255, 255, 255, 0.72);
  --color-accent-soft: rgba(0, 119, 182, 0.1);
  --color-glow: #61d8ff;
  --color-graphite: #101820;
  --color-warning: #b45309;
  --color-warning-soft: #fff7ed;
  --color-warning-strong: #9a3412;
  --dark-primary: #52c8f5;
  --dark-primary-focus: #79e4ff;
  --dark-on-primary: #061016;
  --dark-ink: #f2f5f7;
  --dark-ink-muted-80: #c0c8d0;
  --dark-ink-muted-48: #9ba6b2;
  --dark-canvas: #090c10;
  --dark-canvas-parchment: #0d1217;
  --dark-surface-pearl: #11161c;
  --dark-hairline: #29313a;
  --dark-divider-soft: #20272f;
  --dark-success: #61d990;
  --dark-danger: #ff6978;
  --dark-glow: #79e4ff;
  --dark-graphite: #05080b;
  --dark-warning: #f59e0b;
  --dark-warning-strong: #fbbf24;

  --font-display: "SF Pro Display", system-ui, -apple-system, "PingFang TC", sans-serif;
  --font-text: "SF Pro Text", system-ui, -apple-system, "PingFang TC", sans-serif;

  --radius-xs: 5px;
  --radius-sm: 8px;
  --radius-md: 11px;
  --radius-lg: 18px;
  --radius-pill: 9999px;

  --space-xxs: 4px;
  --space-xs: 8px;
  --space-sm: 12px;
  --space-md: 17px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-xxl: 48px;
  --space-section: 80px;
}

html[data-theme="dark"] {
  --color-primary: var(--dark-primary);
  --color-primary-focus: var(--dark-primary-focus);
  --color-on-primary: var(--dark-on-primary);
  --color-ink: var(--dark-ink);
  --color-ink-muted-80: var(--dark-ink-muted-80);
  --color-ink-muted-48: var(--dark-ink-muted-48);
  --color-canvas: var(--dark-canvas);
  --color-canvas-parchment: var(--dark-canvas-parchment);
  --color-surface-pearl: var(--dark-surface-pearl);
  --color-hairline: var(--dark-hairline);
  --color-divider-soft: var(--dark-divider-soft);
  --color-success: var(--dark-success);
  --color-danger: var(--dark-danger);
  --color-overlay-scrim: rgba(0, 0, 0, 0.56);
  --color-sheet-elevation: rgba(0, 0, 0, 0.5);
  --color-topbar: rgba(9, 12, 16, 0.8);
  --color-hero-wash: rgba(9, 12, 16, 0.18);
  --color-glass: rgba(17, 22, 28, 0.76);
  --color-accent-soft: rgba(82, 200, 245, 0.12);
  --color-glow: var(--dark-glow);
  --color-graphite: var(--dark-graphite);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-canvas);
  font-family: var(--font-text);
  font-size: 17px;
  line-height: 1.5;
  min-width: 320px;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 82% 0%, var(--color-accent-soft), transparent 30%),
    linear-gradient(180deg, var(--color-canvas), var(--color-canvas-parchment));
  background-attachment: fixed;
}

h1, h2, h3, p, dl, dd {
  margin: 0;
}

a {
  color: var(--color-primary);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

a:hover,
button:hover {
  opacity: 0.85;
  transition: opacity 0.2s ease, border-color 0.2s ease, transform 0.3s ease;
}

:focus-visible {
  outline: 2px solid var(--color-primary-focus);
  outline-offset: 2px;
}

.text-display-hero {
  font-family: var(--font-display);
  font-size: 48px;
  font-weight: 700;
  line-height: 1.08;
}

.text-display-md {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.2;
}

.text-title-item {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.2;
}

.text-tagline {
  font-family: var(--font-text);
  font-size: 19px;
  font-weight: 400;
  line-height: 1.4;
}

.text-link {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

/* topbar */

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  height: 48px;
  padding: 0 var(--space-lg);
  background: var(--color-topbar);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-hairline);
}

.topbar-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-left: auto;
}

.theme-switcher select {
  min-height: 34px;
  padding: 4px 28px 4px var(--space-sm);
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}

.brand {
  color: var(--color-ink);
  font-family: var(--font-text);
  font-size: 17px;
  font-weight: 600;
  text-decoration: none;
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  margin-left: auto;
}

.language-switcher-label {
  color: var(--color-ink-muted-48);
  font-size: 14px;
  font-weight: 600;
}

.language-switcher select {
  padding: 4px 26px 4px var(--space-xs);
  color: var(--color-primary);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 14px;
  font-weight: 600;
}

.account {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--color-ink-muted-48);
  font-size: 14px;
}

.account form {
  margin: 0;
}

.role-chip {
  padding: 2px var(--space-sm);
  color: var(--color-ink);
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
}

.link-button {
  padding: 0;
  color: var(--color-primary);
  background: transparent;
  border: 0;
  font-size: 14px;
  cursor: pointer;
}

/* buttons */

button {
  font-family: inherit;
  cursor: pointer;
}

.btn-primary {
  padding: 12px 20px;
  color: var(--color-on-primary);
  background: var(--color-primary);
  border: 0;
  border-radius: var(--radius-sm);
  font-size: 17px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease;
}

.btn-primary:hover {
  background: var(--color-primary-focus);
}

.btn-primary.btn-pill,
.btn-secondary-pill,
.btn-utility {
  border-radius: var(--radius-pill);
}

.btn-secondary-pill {
  padding: 10px 20px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  font-size: 15px;
  font-weight: 600;
}

.btn-secondary-pill:disabled {
  color: var(--color-ink-muted-48);
  cursor: not-allowed;
  opacity: 0.6;
}

.btn-utility {
  padding: 8px 16px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  font-size: 14px;
  font-weight: 600;
}

/* layout shells */

.page {
  max-width: 1180px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.eyebrow {
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.14em;
  line-height: 1.4;
  text-transform: uppercase;
}

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.page-toolbar {
  display: flex;
  justify-content: flex-end;
  margin-bottom: var(--space-md);
}

/* home hero */

.home-page {
  max-width: 1040px;
  padding-top: clamp(56px, 10vw, 120px);
  padding-bottom: var(--space-section);
}

.home-intro {
  display: grid;
  gap: var(--space-md);
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  text-align: center;
}

.home-intro .text-display-hero {
  font-size: clamp(44px, 5.8vw, 82px);
  font-weight: 650;
  letter-spacing: -0.045em;
  white-space: nowrap;
}

:lang(ja) .home-intro .text-display-hero { white-space: normal; }

.hero {
  position: relative;
  display: grid;
  align-items: end;
  min-height: min(760px, calc(100vh - 48px));
  max-width: none;
  margin: 0;
  padding: clamp(36px, 7vw, 96px) max(24px, calc((100vw - 1180px) / 2));
  overflow: hidden;
  isolation: isolate;
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(90deg, var(--color-canvas) 8%, var(--color-hero-wash) 62%, transparent 100%);
  content: "";
}

.hero-copy {
  z-index: 1;
  display: grid;
  gap: var(--space-md);
  max-width: 760px;
  padding: clamp(24px, 4vw, 48px) 0;
}

.hero .text-display-hero {
  max-width: 10ch;
  font-size: clamp(44px, 7vw, 100px);
  font-weight: 650;
  letter-spacing: -0.045em;
}

.hero-scene {
  position: absolute;
  inset: 0;
  z-index: -2;
  background-color: var(--color-canvas-parchment);
  background-image: linear-gradient(120deg, var(--color-accent-soft), transparent 50%), url("/static/brand/hero-light.webp");
  background-position: center;
  background-size: cover;
}

html[data-theme="dark"] .hero-scene {
  background-image: linear-gradient(120deg, var(--color-accent-soft), transparent 50%), url("/static/brand/hero-dark.webp");
}

.hero-tagline {
  margin-top: var(--space-sm);
  color: var(--color-ink-muted-80);
}

.hero-entries {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 980px;
  margin: -44px auto 0;
  padding: 0 var(--space-lg);
  position: relative;
  z-index: 2;
  text-align: left;
}

.home-page-simple .hero-entries {
  margin-top: clamp(40px, 7vw, 72px);
  padding: 0;
}

.hero-entries--single {
  grid-template-columns: minmax(0, 520px);
  justify-content: center;
}

.hero-entry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  padding: var(--space-xxl);
  overflow: hidden;
  color: inherit;
  min-height: 280px;
  background-color: var(--color-glass);
  border: 1px solid var(--color-hairline);
  border-radius: 30px;
  backdrop-filter: blur(24px);
  text-decoration: none;
  transition: transform 0.3s ease, border-color 0.3s ease;
}

.hero-entry-scene {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: var(--color-canvas-parchment);
}

.hero-entry-scene::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(135deg, var(--color-glass) 25%, transparent);
}

.hero-entry-scene img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-entry-card:hover,
.hero-entry-card:focus-visible {
  border-color: var(--color-hairline);
  transform: translateY(-2px);
}

.hero-entry-icon {
  color: var(--color-ink);
}

.entry-arrow {
  color: var(--color-primary);
  font-weight: 600;
}

.fine-print {
  margin-top: var(--space-xxl);
  color: var(--color-ink-muted-48);
  font-size: 14px;
}

.industrial-story {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(32px, 7vw, 96px);
  align-items: center;
  max-width: 1180px;
  margin: var(--space-section) auto 0;
  padding: 0 var(--space-lg);
}

.story-scene {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  background-color: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: 30px;
}

.story-scene::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(145deg, transparent, var(--color-accent-soft));
}

.story-scene img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.story-copy {
  display: grid;
  gap: var(--space-lg);
}

.trust-metrics {
  display: grid;
  gap: var(--space-md);
}

.trust-metrics div {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-hairline);
}

.trust-metrics dt { font-weight: 700; }
.trust-metrics dd { color: var(--color-ink-muted-48); font-size: 14px; }

@media (max-width: 760px) {
  .home-intro .text-display-hero { white-space: normal; }
  .hero-entries {
    grid-template-columns: 1fr;
  }
}

/* ask panel */

.ask-page {
  max-width: 1040px;
  padding-top: clamp(48px, 10vw, 112px);
}

.ask-panel {
  display: grid;
  gap: var(--space-md);
}

.ask-heading {
  display: grid;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
}

.ask-heading-scene {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  min-height: 0;
  margin-bottom: var(--space-lg);
  overflow: hidden;
  background-color: #000;
  border: 1px solid var(--color-hairline);
  border-radius: 30px;
}

.ask-heading-scene video,
.ask-heading-scene img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.ask-heading-scene [hidden] {
  display: none;
}

@media (max-width: 640px) {
  .ask-heading-scene {
    aspect-ratio: 9 / 16;
  }
}

.answer-form {
  display: grid;
  gap: var(--space-sm);
}

.ask-examples {
  display: grid;
  gap: 8px;
}

.ask-examples-title {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 14px;
  font-weight: 600;
}

.ask-example-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-width: 100%;
}

.ask-example {
  max-width: 100%;
  padding: 9px 13px;
  color: var(--color-ink-muted-80);
  text-align: left;
  overflow-wrap: anywhere;
  word-break: break-word;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  font: inherit;
  font-size: 14px;
  line-height: 1.45;
  cursor: pointer;
}

.ask-example:hover,
.ask-example:focus-visible {
  color: var(--color-ink);
  border-color: var(--color-primary-focus);
}

/* Count toggles hide themselves when the approved dataset is empty, so a card
   never shows a control that leads nowhere. */
.approved-combo-toggle[hidden],
.compatible-module-toggle[hidden],
.reference-system-toggle[hidden] {
  display: none !important;
}

.approved-combo-connections,
.approved-combo-procurement {
  list-style: none;
  margin: 0 0 var(--space-sm, 0.75rem);
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs, 0.25rem);
}

.approved-combo-connections li,
.approved-combo-procurement li {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs, 0.25rem) var(--space-sm, 0.75rem);
  align-items: baseline;
}

.approved-combo-connection-pair,
.approved-combo-procurement-model {
  font-weight: 600;
}

.approved-combo-connection-interface,
.approved-combo-procurement-code {
  font-size: 0.875rem;
}

.approved-combo-connection-connector,
.approved-combo-procurement-supply {
  font-size: 0.8125rem;
  opacity: 0.85;
}

.approved-combo-status {
  margin: 0 0 var(--space-sm, 0.75rem);
  font-size: 0.875rem;
}

.ask-input-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
}

.ask-query-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-md);
  align-items: start;
}

.approved-image-preview {
  display: grid;
  grid-template-columns: minmax(220px, 360px) minmax(0, 1fr);
  gap: 8px;
  align-items: center;
  padding: var(--space-sm);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

.approved-image-preview[hidden],
.approved-image-gallery[hidden],
.approved-image-more[hidden] {
  display: none;
}

.approved-image-eyebrow,
.approved-image-model,
.approved-image-caption {
  margin: 0;
}

.approved-image-eyebrow {
  grid-column: 1 / -1;
  color: var(--color-success);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.approved-image-primary-button {
  display: grid;
  grid-column: 1;
  grid-row: 2 / span 3;
  width: 100%;
  min-height: 168px;
  padding: 0;
  place-items: center;
  overflow: hidden;
  background: var(--color-canvas);
  border: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.approved-image-primary-button:focus-visible,
.approved-image-thumb:focus-visible {
  outline: 2px solid var(--color-primary-focus);
  outline-offset: 2px;
}

.approved-image-primary-button img {
  display: block;
  width: 100%;
  height: 168px;
  object-fit: contain;
}

.approved-image-model {
  grid-column: 2;
  grid-row: 2;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 700;
}

.approved-image-caption {
  display: -webkit-box;
  grid-column: 2;
  grid-row: 3;
  overflow: hidden;
  color: var(--color-ink-muted-48);
  font-size: 13px;
  line-height: 1.4;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.approved-image-toggle {
  grid-column: 2;
  grid-row: 4;
  width: fit-content;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
}

.approved-image-gallery {
  display: grid;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-glass);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

.approved-image-gallery-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-sm);
}

.approved-image-gallery-heading-row h2 {
  margin: 0;
  font-size: 18px;
}

.approved-image-gallery-heading-row span {
  color: var(--color-ink-muted-48);
  font-size: 13px;
}

.approved-image-grid {
  display: grid;
  gap: var(--space-sm);
}

.approved-image-group {
  display: grid;
  gap: var(--space-xs);
}

.approved-image-group-heading {
  margin: 0;
  padding-top: var(--space-xs);
  color: var(--color-ink-muted-80);
  font-size: 14px;
  font-weight: 700;
  border-top: 1px solid var(--color-hairline);
}

.approved-image-group-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: var(--space-sm);
}

.approved-image-thumb {
  display: grid;
  gap: 6px;
  min-width: 0;
  padding: 8px;
  color: var(--color-ink-muted-80);
  text-align: left;
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.approved-image-thumb:hover {
  border-color: var(--color-primary-focus);
}

.approved-image-thumb img {
  width: 100%;
  height: 112px;
  object-fit: contain;
}

.approved-image-thumb span {
  display: -webkit-box;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.35;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.approved-image-more {
  justify-self: center;
}

.ask-input {
  box-sizing: border-box;
  flex: 1;
  width: 100%;
  height: 120px;
  min-height: 120px;
  max-height: 120px;
  padding: 14px 20px;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  font-size: 17px;
  font-family: inherit;
  line-height: 1.55;
  overflow-x: hidden;
  overflow-y: auto;
  overflow-wrap: anywhere;
  resize: none;
  white-space: pre-wrap;
  word-break: break-word;
}

.ask-input:focus-visible {
  outline: 2px solid var(--color-primary-focus);
  outline-offset: 0;
}

.ask-submit {
  display: inline-flex;
  flex: 0 0 200px;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  width: 200px;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.answer-time-hint {
  color: var(--color-ink-muted-48);
  font-size: 14px;
}

.privacy-input-notice {
  margin: 8px 0 0;
  color: var(--color-ink-muted-80);
  font-size: 14px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}

.thinking-dots {
  display: inline-flex;
  gap: 4px;
}

.thinking-dots span {
  width: 6px;
  height: 6px;
  background: var(--color-on-primary);
  border-radius: var(--radius-pill);
  animation: thinking-bounce 1.1s ease-in-out infinite;
}

.thinking-dots span:nth-child(2) {
  animation-delay: 0.15s;
}

.thinking-dots span:nth-child(3) {
  animation-delay: 0.3s;
}

@keyframes thinking-bounce {
  0%, 80%, 100% {
    transform: translateY(0);
    opacity: 0.6;
  }
  40% {
    transform: translateY(-4px);
    opacity: 1;
  }
}

.answer-panel {
  display: grid;
  gap: var(--space-sm);
}

.answer-status {
  color: var(--color-ink-muted-48);
}

.enterprise-opening,
.enterprise-closing {
  color: var(--color-ink-muted-80);
  line-height: 1.65;
}

.enterprise-closing {
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

.enterprise-closing[hidden] {
  display: none;
}

.enterprise-contact {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs) var(--space-md);
  align-items: center;
  font-style: normal;
}

.answer-output {
  min-height: 120px;
  padding: var(--space-md);
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  background: var(--color-glass);
  backdrop-filter: blur(18px);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  font: inherit;
  line-height: 1.5;
}

/* A specification lookup answers through its cards, so the answer panel would
   otherwise sit under them as an empty bordered block. */
.answer-output:empty {
  display: none;
}

.answer-chunk {
  animation: fade-in 0.3s ease;
}

.answer-source-link {
  font-size: 0.82em;
  font-weight: 600;
  vertical-align: super;
  text-decoration: none;
}

.answer-source-link:hover {
  text-decoration: underline;
}

.answer-sources {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 240px), 1fr));
  gap: var(--space-sm);
  padding-bottom: var(--space-xs);
  overflow-x: visible;
}

/* Without this the class selector beats the UA [hidden] rule and an empty
   results container would reserve a grid row above the answer. */
.answer-sources[hidden] {
  display: none;
}

.source-group {
  display: grid;
  grid-column: 1 / -1;
  gap: var(--space-xs);
}

.source-group + .source-group {
  margin-top: var(--space-md);
}

.source-spec-evidence {
  grid-column: 1 / -1;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-hairline);
  font-size: 14px;
}

.source-spec-evidence summary {
  width: fit-content;
  color: var(--color-primary);
  font-weight: 600;
  cursor: pointer;
}

.source-spec-evidence ul {
  display: grid;
  gap: var(--space-xs);
  margin: var(--space-sm) 0 0;
  padding-inline-start: 20px;
}

.source-spec-evidence a {
  color: var(--color-primary);
  overflow-wrap: anywhere;
}

.source-group-heading {
  margin: 0;
  color: var(--color-ink-muted-80);
  font-size: 15px;
  line-height: 1.35;
}

.source-group-empty {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 14px;
  line-height: 1.5;
}

.source-group-notice {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 14px;
  line-height: 1.5;
}

.result-group {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

.result-group-heading {
  margin: 0;
  color: var(--ink-strong);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
}

.result-group-empty {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 0.95rem;
  line-height: 1.5;
}

.result-group--similar .result-group-heading {
  color: var(--accent-warm);
}

.source-group--exact .source-group-heading {
  color: var(--color-success);
}

.source-group--reference .source-group-heading {
  color: var(--accent-cool);
}

.source-group-cards {
  padding-bottom: 0;
}

.source-card {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, transform 0.3s ease;
}

.source-card:hover {
  border-color: var(--color-primary-focus);
  transform: translateY(-1px);
}

.source-card-thumb {
  display: grid;
  flex: 0 0 60px;
  width: 60px;
  height: 60px;
  place-items: center;
  overflow: hidden;
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-sm);
}

.source-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.source-card-placeholder {
  color: var(--color-ink-muted-48);
  font-size: 14px;
  font-weight: 600;
}

.source-card-body {
  display: grid;
  min-width: 0;
  gap: var(--space-xxs);
}

.source-card-title {
  overflow-wrap: anywhere;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
  white-space: normal;
}

.source-card-title:hover {
  text-decoration: underline;
}

.source-card-type,
.source-card-page,
.source-card-datasheet {
  overflow-wrap: anywhere;
  color: var(--color-ink-muted-48);
  font-size: 14px;
  line-height: 1.43;
}

.source-card-datasheet {
  width: fit-content;
}

.source-card-classification {
  display: inline-flex;
  width: fit-content;
  padding: 1px 8px;
  border-radius: var(--radius-sm);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.source-card-classification--exact {
  color: var(--color-success);
  background: rgba(29, 125, 51, 0.12);
}

.source-card-classification--similar {
  color: var(--color-ink-muted-80);
  background: var(--color-canvas-parchment);
}

.source-card-classification--reference {
  color: var(--accent-cool);
  background: color-mix(in srgb, var(--accent-cool) 12%, var(--color-surface));
}

.source-card-assessments {
  display: grid;
  gap: 2px;
  margin: 2px 0 0;
  padding: 0;
  list-style: none;
}

.partial-solution-list {
  display: grid;
  gap: var(--space-sm);
  min-width: 0;
}

.partial-solution-row {
  display: grid;
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
  gap: var(--space-sm);
  align-items: start;
  min-width: 0;
}

.module-solution-notice {
  margin: var(--space-xs) 0 0;
  color: var(--color-ink-muted-80);
  font-size: 12px;
  line-height: 1.5;
}

.module-solution-conditions {
  grid-column: 1 / -1;
  padding: var(--space-xs) var(--space-sm);
  border-left: 3px solid var(--color-warning);
  background: var(--color-warning-soft);
  color: var(--color-ink);
  font-size: 12px;
  line-height: 1.5;
}

.module-solution-conditional-badge {
  display: inline-block;
  color: var(--color-warning-strong);
  font-weight: 700;
}

.module-solution-condition-list {
  margin: 2px 0 0;
  padding-left: 1.2em;
}

.module-solution-condition-slots {
  margin: 2px 0 0;
  color: var(--color-ink-muted-80);
}

html[data-theme="dark"] .module-solution-conditions {
  border-left-color: var(--dark-warning);
  background: rgba(245, 158, 11, 0.12);
}

html[data-theme="dark"] .module-solution-conditional-badge {
  color: var(--dark-warning-strong);
}

.module-solution-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin: 0;
  padding: 0 0 2px;
  min-width: 0;
  list-style: none;
}

.module-solution-plus {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  align-self: center;
  min-width: 14px;
  color: var(--color-ink-muted-80);
  font-size: 20px;
  font-weight: 700;
  line-height: 1;
}

.module-solution-item {
  display: grid;
  flex: 0 0 auto;
  gap: 2px;
  align-content: start;
  width: 132px;
  min-width: 0;
  padding: var(--space-xxs);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  scroll-snap-align: start;
}

.module-solution-image {
  width: 100%;
  height: 72px;
  object-fit: contain;
  background: var(--color-canvas);
  border-radius: var(--radius-sm);
}

.module-solution-name {
  overflow-wrap: anywhere;
  color: var(--color-ink);
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
}

.module-solution-provides {
  overflow-wrap: anywhere;
  color: var(--color-ink-muted-80);
  font-size: 11px;
  line-height: 1.35;
}

@media (max-width: 520px) {
  .partial-solution-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .module-solution-row {
    flex-wrap: nowrap;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    -webkit-overflow-scrolling: touch;
  }

  .module-solution-item {
    scroll-snap-align: start;
  }
}

.source-card-assessment {
  overflow-wrap: anywhere;
  color: var(--color-ink-muted-48);
  font-size: 12px;
  line-height: 1.4;
}

.source-card-assessment--proven {
  color: var(--color-success);
}

.source-card-assessment--contradicted {
  color: var(--color-danger);
}

.reference-system-toggle {
  width: fit-content;
  margin-top: var(--space-xxs);
  padding: 6px 12px;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary-focus);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.reference-system-panel {
  display: grid;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-hairline);
}

.reference-system-panel[hidden] {
  display: none;
}

.reference-system-status {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 13px;
  line-height: 1.45;
}

.reference-system-retry {
  width: fit-content;
}

.compatible-module-toggle,
.compatible-module-retry {
  width: fit-content;
  padding: 6px 12px;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary-focus);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.compatible-module-toggle {
  margin-top: var(--space-xxs);
}

.compatible-module-panel {
  display: grid;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-hairline);
}

.compatible-module-panel[hidden] {
  display: none;
}

.compatible-module-live-status:empty {
  display: none;
}

.compatible-module-message,
.compatible-module-notice,
.compatible-module-reason,
.compatible-module-relation {
  margin: 0;
  font-size: 12px;
  line-height: 1.45;
}

.compatible-module-message,
.compatible-module-notice,
.compatible-module-reason {
  color: var(--color-ink-muted-48);
}

.compatible-module-list {
  display: grid;
  gap: var(--space-xs);
  padding: var(--space-xs) 0;
}

.compatible-module-category {
  border-bottom: 1px solid var(--color-hairline);
}

.compatible-module-category > summary {
  padding: var(--space-xs) 0;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.compatible-module-card {
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.compatible-module-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: var(--space-xs);
  align-items: center;
  min-width: 0;
  padding: var(--space-xs);
  cursor: pointer;
}

.compatible-module-image,
.compatible-module-image-placeholder {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-xs);
}

.compatible-module-image {
  display: block;
  object-fit: contain;
  background: var(--color-canvas);
}

.compatible-module-image-placeholder {
  display: grid;
  place-items: center;
  padding: var(--space-xxs);
  color: var(--color-ink-muted-48);
  background: var(--color-canvas);
  font-size: 10px;
  line-height: 1.3;
  text-align: center;
}

.compatible-module-image-placeholder[hidden] {
  display: none;
}

.compatible-module-copy {
  display: grid;
  min-width: 0;
  gap: 3px;
}

.compatible-module-model {
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
}

.compatible-module-summary {
  overflow: hidden;
  color: var(--color-ink-muted-80);
  font-size: 12px;
  line-height: 1.45;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.compatible-module-product-link {
  width: fit-content;
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 700;
}

.compatible-module-detail-region {
  padding: 0 var(--space-xs) var(--space-xs) calc(72px + var(--space-md));
  border-top: 1px solid var(--color-hairline);
}

.compatible-module-card--compatible {
  border-left: 3px solid var(--color-success);
}

.compatible-module-card--unknown {
  border-left: 3px solid var(--color-ink-muted-48);
}

.compatible-module-card--conflict {
  border-left: 3px solid var(--color-danger);
}

.compatible-module-status {
  width: fit-content;
  font-size: 11px;
  font-weight: 700;
}

.compatible-module-status--compatible {
  color: var(--color-success);
}

.compatible-module-status--unknown {
  color: var(--color-ink-muted-48);
}

.compatible-module-status--conflict {
  color: var(--color-danger);
}

.compatible-module-category > summary:focus-visible,
.compatible-module-row:focus-visible,
.compatible-module-product-link:focus-visible {
  outline: 2px solid var(--color-primary-focus);
  outline-offset: 2px;
}

.compatible-module-facts,
.compatible-module-details,
.compatible-module-evidence {
  display: grid;
  gap: var(--space-xxs);
  margin: 0;
  padding-left: 18px;
  font-size: 12px;
}

.compatible-module-fact {
  display: grid;
  gap: var(--space-xxs);
}

.compatible-module-label {
  color: var(--color-ink-muted-48);
  font-size: 11px;
  font-weight: 700;
}

.compatible-module-evidence a {
  color: var(--color-ink-muted-48);
  font-size: 11px;
}

@media (max-width: 520px) {
  .compatible-module-detail-region {
    padding-left: var(--space-xs);
  }
}

.approved-combo-toggle,
.approved-combo-retry {
  width: fit-content;
  padding: 6px 12px;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary-focus);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.approved-combo-toggle {
  margin-top: var(--space-xxs);
}

.approved-combo-panel {
  display: grid;
  gap: var(--space-xs);
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-hairline);
}

.approved-combo-panel[hidden],
.approved-combo-live-status:empty {
  display: none;
}

.approved-combo-heading,
.approved-combo-detail h5,
.approved-combo-message,
.approved-combo-meta,
.approved-combo-notice {
  margin: 0;
}

.approved-combo-heading {
  font-size: 14px;
}

.approved-combo-message,
.approved-combo-meta,
.approved-combo-notice,
.approved-combo-members,
.approved-combo-spec-notice,
.approved-combo-no-image {
  color: var(--color-ink-muted-48);
  font-size: 12px;
  line-height: 1.45;
}

.approved-combo-list,
.approved-combo-detail {
  display: grid;
  gap: var(--space-xs);
}

.approved-combo-card {
  overflow: hidden;
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
}

.approved-system-card {
  display: grid;
  gap: var(--space-xxs);
  padding: var(--space-xs);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
}

.approved-system-title {
  margin: 0;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
}

.approved-system-figure {
  display: grid;
  gap: var(--space-xxs);
  margin: 0;
}

.approved-system-configurations {
  display: grid;
  gap: var(--space-xxs);
}

.approved-system-configuration {
  padding: var(--space-xxs) 0;
  border-top: 1px solid var(--color-hairline);
}

.approved-system-modules {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.approved-system-modules li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-xxs);
  font-size: 12px;
}

.approved-system-no-modules {
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 12px;
}

.approved-combo-card > summary {
  padding: var(--space-xs);
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.approved-combo-card > summary:focus-visible,
.approved-combo-member a:focus-visible,
.approved-combo-gallery-toggle:focus-visible {
  outline: 2px solid var(--color-primary-focus);
  outline-offset: 2px;
}

.approved-combo-detail {
  padding: var(--space-xs);
  border-top: 1px solid var(--color-hairline);
}

.approved-combo-members {
  display: grid;
  gap: var(--space-xxs);
  margin: 0;
  padding: 0;
}

.approved-combo-approval {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xxs);
  color: var(--color-ink-muted-48);
  font-size: 12px;
}

.approved-combo-badge,
.approved-combo-image-badge {
  width: fit-content;
  padding: 3px 8px;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-pill);
  font-size: 11px;
  font-weight: 700;
}

.approved-combo-hero,
.approved-combo-gallery-item {
  display: grid;
  gap: var(--space-xxs);
  margin: 0;
}

.approved-combo-hero-image,
.approved-combo-hero-image-placeholder {
  width: min(100%, 640px);
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-sm);
}

.approved-combo-hero-image,
.approved-combo-gallery-image,
.approved-combo-member-image {
  display: block;
  object-fit: contain;
  background: var(--color-canvas);
}

.approved-combo-hero-image-placeholder,
.approved-combo-gallery-image-placeholder,
.approved-combo-member-image-placeholder {
  display: grid;
  place-items: center;
  min-height: 72px;
  padding: var(--space-xs);
  color: var(--color-ink-muted-48);
  background: var(--color-canvas);
  border: 1px dashed var(--color-hairline);
  font-size: 12px;
}

.approved-combo-gallery-toggle {
  width: fit-content;
  padding: 6px 10px;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-primary-focus);
  border-radius: var(--radius-pill);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.approved-combo-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-xs);
}

.approved-combo-gallery[hidden] {
  display: none;
}

.approved-combo-gallery-image {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  border-radius: var(--radius-xs);
}

.approved-combo-specs {
  display: grid;
  grid-template-columns: minmax(90px, auto) 1fr;
  gap: var(--space-xxs) var(--space-xs);
  margin: 0;
  color: var(--color-ink-muted-48);
  font-size: 12px;
}

.approved-combo-specs dt {
  font-weight: 700;
}

.approved-combo-specs dd {
  margin: 0;
}

.approved-combo-member {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: var(--space-xs);
  padding: var(--space-xs);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-xs);
}

.approved-combo-member-visual {
  min-width: 0;
}

.approved-combo-member-image {
  width: 112px;
  max-width: 100%;
  height: 84px;
  border-radius: var(--radius-xs);
}

.approved-combo-member-copy {
  display: grid;
  align-content: start;
  gap: var(--space-xxs);
  min-width: 0;
}

.approved-combo-member a {
  width: fit-content;
  color: var(--color-primary);
  font-weight: 700;
  text-decoration: none;
}

.approved-combo-notice {
  padding-top: var(--space-xs);
  border-top: 1px solid var(--color-hairline);
}

@media (max-width: 520px) {
  .approved-combo-member {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .approved-combo-member-image {
    width: 88px;
    height: 72px;
  }
}

.reference-system-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(112px, 1fr));
  gap: var(--space-xs);
}

.reference-system-thumb {
  position: relative;
  display: grid;
  min-width: 0;
  gap: var(--space-xxs);
  padding: var(--space-xs);
  color: var(--color-ink-muted-80);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  line-height: 1.35;
  text-align: left;
  cursor: pointer;
}

.reference-system-thumb--text {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 88px;
}

.reference-system-thumb-title,
.reference-system-no-image {
  grid-column: 1 / -1;
}

.reference-system-thumb-caption {
  grid-column: 1 / -1;
  color: var(--color-ink-muted-80);
  font-size: 11px;
  font-weight: 500;
  line-height: 1.35;
}

.reference-system-kind-label,
.reference-system-image-pending {
  width: fit-content;
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  font-size: 11px;
}

.reference-system-illustration-badge {
  position: absolute;
  top: 0.6rem;
  left: 0.6rem;
  max-width: calc(100% - 1.2rem);
  padding: 0.25rem 0.5rem;
  border-radius: 999px;
  background: var(--color-canvas);
  color: var(--color-ink);
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1.25;
  box-shadow: 0 1px 4px var(--color-sheet-elevation);
}

.reference-system-kind-label {
  color: var(--color-primary);
  background: var(--color-primary-soft);
}

.reference-system-image-pending {
  color: var(--color-ink-muted-80);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
}

.reference-system-no-image {
  color: var(--color-ink-muted-48);
  font-weight: 500;
}

.reference-system-thumb img,
.reference-system-thumb-placeholder {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  background: var(--color-canvas);
  border-radius: var(--radius-sm);
}

.reference-system-thumb-placeholder,
.reference-system-dialog-placeholder {
  display: grid;
  place-items: center;
  color: var(--color-ink-muted-48);
}

.reference-system-dialog {
  width: min(760px, calc(100% - 2rem));
  max-height: calc(100dvh - 2rem);
  overflow: auto;
  padding: 0;
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-lg);
}

.reference-system-dialog:not([open]) {
  display: none;
}

.reference-system-dialog::backdrop {
  background: rgba(0, 0, 0, 0.56);
}

.reference-system-dialog-shell {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-lg);
}

.reference-system-dialog-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-sm);
}

.reference-system-dialog-header h2,
.reference-system-dialog-shell h3,
.reference-system-dialog-notice {
  margin: 0;
}

.reference-system-dialog-close {
  flex: 0 0 auto;
  padding: 6px 10px;
  color: var(--color-primary);
  background: transparent;
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-pill);
  font: inherit;
  cursor: pointer;
}

.reference-system-dialog-media {
  display: grid;
  min-height: 220px;
  place-items: center;
  overflow: hidden;
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-md);
}

.reference-system-dialog-media[hidden] {
  display: none;
}

.reference-system-dialog-media img {
  width: 100%;
  max-height: 380px;
  object-fit: contain;
}

.reference-system-dialog-media img[hidden],
.reference-system-dialog-placeholder[hidden] {
  display: none;
}

.reference-system-dialog-placeholder {
  min-height: 220px;
}

.reference-system-dialog-notice {
  color: var(--color-ink-muted-48);
  font-size: 14px;
  line-height: 1.5;
}

.reference-system-specs {
  display: grid;
  grid-template-columns: minmax(110px, 0.35fr) minmax(0, 1fr);
  gap: var(--space-xs) var(--space-sm);
  margin: var(--space-xs) 0 0;
}

.reference-system-specs dt {
  color: var(--color-ink-muted-80);
  font-weight: 700;
}

.reference-system-specs dd {
  margin: 0;
  overflow-wrap: anywhere;
  color: var(--color-ink-muted-48);
}

.reference-system-dialog-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.empty-state {
  display: grid;
  grid-template-columns: minmax(120px, 220px) minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: center;
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  color: var(--color-ink-muted-80);
  background: var(--color-canvas-parchment);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

@media (max-width: 640px) {
  .reference-system-dialog-shell {
    padding: var(--space-md);
  }

  .reference-system-dialog-media,
  .reference-system-dialog-placeholder {
    min-height: 160px;
  }

  .reference-system-specs {
    grid-template-columns: 1fr;
    gap: var(--space-xxs);
  }

  .reference-system-specs dd + dt {
    margin-top: var(--space-xs);
  }
}

.empty-state[hidden] {
  display: none;
}

.empty-state img {
  display: block;
  width: 100%;
  max-height: 180px;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.empty-state div {
  display: grid;
  gap: var(--space-xs);
}

.answer-error strong {
  color: var(--color-danger);
  font-weight: 700;
}

@keyframes fade-in {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.fade-in {
  animation: fade-in 0.2s ease;
}

/* wizard */

.wizard-page {
  max-width: 720px;
  position: relative;
}

.wizard-scene {
  position: fixed;
  inset: 48px 0 0 52%;
  z-index: -1;
  overflow: hidden;
  background-color: var(--color-canvas);
  opacity: 0.34;
}

.wizard-scene::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(90deg, var(--color-canvas), transparent);
}

.wizard-scene img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.live-count-chip {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  padding: 6px var(--space-sm);
  color: var(--color-ink);
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
}

.wizard-shell {
  display: grid;
  gap: var(--space-lg);
  padding-top: var(--space-xxl);
  text-align: center;
}

.progress-dots {
  display: flex;
  justify-content: center;
  gap: var(--space-xs);
}

.dot {
  width: 8px;
  height: 8px;
  background: var(--color-hairline);
  border-radius: var(--radius-pill);
  transition: background 0.2s ease;
}

.dot-complete,
.dot-current {
  background: var(--color-primary);
}

.wizard-options {
  display: grid;
  gap: var(--space-sm);
  text-align: left;
}

.wizard-option {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  color: var(--color-ink);
  background: var(--color-canvas);
  border: 2px solid var(--color-hairline);
  border-radius: var(--radius-md);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.wizard-option:hover,
.wizard-option:focus-visible {
  border-color: var(--color-primary-focus);
}

.wizard-option.is-selected {
  background: var(--color-surface-pearl);
  border-color: var(--color-primary);
}

.wizard-option-count {
  color: var(--color-ink-muted-48);
  font-size: 14px;
  font-weight: 400;
}

.wizard-error {
  color: var(--color-danger);
  font-weight: 600;
}

.wizard-skip {
  justify-self: center;
  background: transparent;
  border: 0;
}

.wizard-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-md);
}

/* selected chips */

.selected-chips-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-md);
}

.chip {
  display: inline-flex;
  align-items: center;
  padding: 6px var(--space-sm);
  color: var(--color-ink);
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
}

/* results toolbar */

.results-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.result-count {
  margin-bottom: var(--space-md);
  color: var(--color-ink-muted-80);
  font-weight: 600;
}

/* product cards */

.product-card-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-lg);
}

@media (min-width: 640px) {
  .product-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .product-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.product-card {
  display: grid;
  min-width: 0;
  gap: var(--space-sm);
  padding: var(--space-lg);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.product-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-2px);
}

.product-card-media {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 160px;
  background: var(--color-canvas-parchment);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.product-card-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.product-card-placeholder {
  color: var(--color-ink-muted-48);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  text-transform: uppercase;
}

.product-card-title {
  overflow-wrap: anywhere;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.2;
}

.product-card-line {
  color: var(--color-ink-muted-48);
  font-size: 14px;
}

.product-card-cpu-chip {
  display: inline-flex;
  align-self: flex-start;
  padding: 4px var(--space-sm);
  color: var(--color-ink);
  background: var(--color-surface-pearl);
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
}

.product-card-specs {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-xs) var(--space-sm);
}

.product-card-specs div {
  display: grid;
  gap: 2px;
}

.product-card-specs dt {
  color: var(--color-ink-muted-48);
  font-size: 14px;
}

.product-card-specs dd {
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: 14px;
  font-weight: 600;
}

.product-card-links {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.product-card-classification {
  align-self: flex-start;
  display: inline-flex;
  margin-top: 0.9rem;
  padding: 0.28rem 0.55rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.product-card-classification--exact {
  color: var(--accent-cool);
}

.product-card-classification--similar {
  color: var(--accent-warm);
}

.product-card-datasheet-unavailable {
  color: var(--color-ink-muted-48);
  font-size: 14px;
  line-height: 1.43;
}

.product-card-combos {
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-divider-soft);
  color: var(--color-ink-muted-48);
  font-size: 14px;
  font-weight: 600;
}

.approved-combination-results {
  margin: var(--space-xl) 0;
  padding: var(--space-lg);
  border: 1px solid color-mix(in srgb, var(--accent-cool) 45%, var(--color-divider-soft));
  border-radius: var(--radius-lg);
  background: color-mix(in srgb, var(--accent-cool) 8%, var(--color-surface));
}

.approved-combination-header {
  max-width: 72ch;
  margin-bottom: var(--space-lg);
}

.approved-combination-header h2,
.approved-combination-card h3 {
  margin: 0;
}

.approved-combination-header p:last-child {
  margin-bottom: 0;
  color: var(--color-ink-muted-48);
}

.approved-combination-eyebrow {
  margin: 0 0 var(--space-xs);
  color: var(--accent-cool);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.approved-combination-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: var(--space-md);
}

.approved-combination-card {
  padding: var(--space-md);
  border: 1px solid var(--color-divider-soft);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.approved-combination-card > p {
  color: var(--color-ink-muted-48);
}

.approved-combination-card dl {
  display: grid;
  gap: var(--space-sm);
  margin: 0;
}

.approved-combination-card dt {
  color: var(--accent-cool);
  font-size: 0.8rem;
  font-weight: 700;
}

.approved-combination-card dd {
  margin: 0.2rem 0 0;
}

.approved-combination-card ul {
  display: grid;
  gap: 0.2rem;
  margin: 0;
  padding-left: 1.1rem;
}

/* advanced filter sheet */

.filter-sheet-overlay {
  position: fixed;
  inset: 0;
  z-index: 30;
  background: var(--color-overlay-scrim); /* overlay */
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.filter-sheet-overlay[hidden] {
  display: none;
}

.filter-sheet-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.filter-sheet {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 31;
  display: grid;
  align-content: start;
  gap: var(--space-md);
  width: 360px;
  max-width: 100%;
  padding: var(--space-lg);
  overflow-y: auto;
  background: var(--color-canvas);
  border-left: 1px solid var(--color-hairline);
  box-shadow: -8px 0 24px var(--color-sheet-elevation); /* sheet transient elevation, exempt from no-shadow rule */
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.filter-sheet[hidden] {
  display: none;
}

.filter-sheet.is-open {
  transform: translateX(0);
}

.filter-sheet-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* facets / filter form (shared by index.html full page and the sheet) */

.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.facets-panel,
.filter-form {
  display: grid;
  gap: var(--space-md);
}

.facets-panel {
  padding: var(--space-md);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-md);
}

.field-label,
.filter-group-title {
  font-size: 15px;
  font-weight: 700;
}

.text-input {
  width: 100%;
  padding: 10px var(--space-sm);
  background: var(--color-canvas);
  border: 1px solid var(--color-hairline);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-family: inherit;
}

.filter-group {
  display: grid;
  gap: var(--space-xs);
}

.facet-option {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-xs);
  align-items: center;
  font-size: 14px;
}

.facet-count {
  color: var(--color-ink-muted-48);
}

.facet-more {
  display: grid;
  gap: var(--space-xs);
}

.facet-more summary {
  color: var(--color-primary);
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.facet-more[open] summary {
  margin-bottom: var(--space-xs);
}

/* login */

.login-page {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: clamp(24px, 6vw, 80px);
  align-items: stretch;
  max-width: 1180px;
  min-height: calc(100vh - 48px);
  padding: var(--space-xl) var(--space-lg);
}

.login-scene {
  position: relative;
  min-height: 620px;
  overflow: hidden;
  background-color: var(--color-graphite);
  border: 1px solid var(--color-hairline);
  border-radius: 30px;
}

.login-scene::after {
  position: absolute;
  inset: 0;
  content: "";
  background-image: linear-gradient(145deg, var(--color-accent-soft), transparent);
}

.login-scene img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.login-card {
  display: grid;
  gap: var(--space-md);
  width: min(100%, 380px);
  padding: var(--space-lg);
  align-self: center;
  padding: clamp(24px, 5vw, 56px);
  background: var(--color-glass);
  border: 1px solid var(--color-hairline);
  border-radius: 30px;
  backdrop-filter: blur(24px);
}

.login-form {
  display: grid;
  gap: var(--space-sm);
}

.error-text {
  color: var(--color-danger);
  font-weight: 700;
}

@media (max-width: 760px) {
  .hero-scene { background-image: linear-gradient(0deg, var(--color-accent-soft), transparent 65%), url("/static/brand/hero-mobile.webp"); }
  html[data-theme="dark"] .hero-scene { background-image: linear-gradient(0deg, var(--color-accent-soft), transparent 65%), url("/static/brand/hero-mobile.webp"); }
  .topbar {
    height: auto;
    min-height: 48px;
    padding: var(--space-xs) var(--space-sm);
    flex-wrap: wrap;
  }

  .topbar-controls { order: 3; width: 100%; }
  .language-switcher { flex: 1; }
  .language-switcher-label { display: none; }
  .account-name { display: none; }
  .hero { min-height: 640px; padding-inline: var(--space-lg); }
  .hero::after { background: linear-gradient(0deg, var(--color-canvas) 8%, transparent 75%); }
  .hero-entries { margin-top: -24px; }
  .home-page-simple .hero-entries { margin-top: var(--space-xl); }
  .hero-entry-card { min-height: 230px; padding: var(--space-xl); }
  .industrial-story { grid-template-columns: 1fr; }
  .story-scene { min-height: 360px; }
  .login-page { grid-template-columns: 1fr; }
  .login-scene { min-height: 260px; }
  .wizard-scene { display: none; }
  .empty-state { grid-template-columns: 1fr; }
  .layout {
    grid-template-columns: 1fr;
  }

  .ask-input-row {
    flex-direction: column;
  }

  .ask-query-layout {
    grid-template-columns: 1fr;
  }

  .approved-image-preview {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: center;
  }

  .approved-image-eyebrow,
  .approved-image-toggle {
    grid-column: 1 / -1;
  }

  .approved-image-primary-button {
    grid-column: 1;
    grid-row: 2 / span 2;
    min-height: 96px;
  }

  .approved-image-primary-button img {
    height: 96px;
  }

  .approved-image-model {
    grid-column: 2;
    grid-row: 2;
  }

  .approved-image-caption {
    grid-column: 2;
    grid-row: 3;
  }

  .approved-image-toggle {
    grid-row: 4;
  }

  .ask-heading-scene {
    min-height: 0;
    border-radius: var(--radius-md);
  }

  .ask-submit {
    flex: none;
    width: 100%;
  }

  .filter-sheet {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .ask-heading-scene video {
    animation: none !important;
  }
}
.conversation-panel {
  margin: 1rem 0;
  padding: 1rem;
  border: 1px solid var(--color-hairline);
  border-radius: 1rem;
  background: var(--color-surface-pearl);
}

.conversation-panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.conversation-panel-heading h2 {
  margin: 0;
  font-size: 1rem;
}

.ask-page .ask-condition-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  min-width: 0;
}

.ask-page .ask-condition-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-width: 0;
  max-width: 100%;
  padding: 0.2rem 0.35rem 0.2rem 0.6rem;
  border: 1px solid var(--color-hairline);
  border-radius: 999px;
  background: var(--color-surface);
  font-size: 0.875rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.ask-page .ask-condition-chip-label {
  min-width: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.ask-page .ask-condition-chip-step,
.ask-page .ask-condition-chip-remove {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.375rem;
  height: 1.375rem;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
}

.ask-page .ask-condition-chip-step:hover,
.ask-page .ask-condition-chip-remove:hover {
  border-color: var(--color-hairline);
}

.ask-page .ask-condition-chip-remove {
  font-size: 1rem;
}

.ask-page .ask-condition-chip-step:focus-visible,
.ask-page .ask-condition-chip-remove:focus-visible {
  outline: 2px solid var(--color-accent, currentColor);
  outline-offset: 1px;
}

.ask-page .ask-condition-chip--sku {
  overflow-wrap: anywhere;
}

.ask-page .ask-workspace-latest,
.ask-page .ask-workspace-empty,
.ask-page .ask-workspace-change,
.ask-page .ask-workspace-status {
  margin: 0.5rem 0 0;
  min-width: 0;
}

.ask-page .ask-recent-queries {
  margin-top: 0.75rem;
  min-width: 0;
}

.ask-page .ask-recent-queries ul {
  margin: 0.5rem 0 0;
  padding-left: 1.25rem;
}

.ask-page .ask-recent-queries li {
  overflow-wrap: anywhere;
  word-break: break-word;
}

@media (max-width: 640px) {
  .ask-page .conversation-panel-heading {
    flex-direction: column;
    align-items: flex-start;
  }
}

.conversation-turn {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--color-hairline);
}

.conversation-turn p {
  white-space: pre-wrap;
}

.conversation-turn a {
  display: inline-block;
  margin-right: 0.75rem;
}