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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  background: var(--ivory);
}

body {
  min-width: 320px;
  min-height: 100dvh;
  margin: 0;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
  background:
    linear-gradient(90deg, rgba(17, 18, 20, 0.018) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 18, 20, 0.014) 1px, transparent 1px),
    var(--ivory);
  background-size: 80px 80px, 80px 80px, auto;
  color: var(--black);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

[hidden] {
  display: none !important;
}

main {
  flex: 1;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  color: inherit;
}

p,
h1,
h2,
h3,
h4,
ul,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3,
h4 {
  color: var(--black);
  font-family: var(--font-title);
  line-height: 1.04;
  letter-spacing: 0;
  text-wrap: balance;
}

h1 {
  max-width: 760px;
  font-size: 58px;
  font-weight: 700;
}

h2 {
  font-size: 34px;
  font-weight: 650;
}

h3 {
  font-size: 21px;
  font-weight: 650;
}

h4 {
  font-size: 16px;
  font-weight: 650;
}

p,
li,
dd {
  color: var(--steel-dark);
  text-wrap: pretty;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--mineral);
  outline-offset: 4px;
}

.container {
  width: min(1180px, calc(100% - 48px));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 80;
  transform: translateY(-160%);
  border: 1px solid var(--black);
  border-radius: 6px;
  background: var(--paper);
  color: var(--black);
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

.icon-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--line);
  background: rgba(244, 242, 236, 0.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.72) inset;
}

.nav-bar {
  position: relative;
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand,
.footer-brand {
  color: var(--black);
  font-family: var(--font-title);
  font-size: 18px;
  font-weight: 650;
  line-height: 1;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--steel-dark);
  font-size: 14px;
  font-weight: 600;
}

.main-nav a,
.site-footer a {
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}

.main-nav a {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  color: var(--steel-dark);
}

.main-nav a:hover,
.main-nav a[aria-current="page"],
.site-footer a:hover {
  border-color: currentColor;
  color: var(--black);
}

.menu-toggle {
  width: 46px;
  height: 46px;
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: rgba(251, 250, 246, 0.74);
  cursor: pointer;
}

.menu-toggle span {
  width: 17px;
  height: 1px;
  display: block;
  background: var(--black);
  transition: transform 160ms ease, opacity 160ms ease;
}

.site-header.menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.site-header.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

.site-header.menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.tool-page .tool-common-hero,
.case-page .case-action-hero {
  background: transparent;
  padding: 0;
}

.tool-common-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.58fr);
  gap: 12px 30px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding: 42px 0 34px;
}

.back-link,
.eyebrow,
.card-meta,
.meta,
.case-card-kicker,
.case-step-number,
.axis-value,
.result-count,
.tag,
.case-card-meta small,
.case-quick-starts button,
.input-with-unit em,
.step-pill {
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.4;
}

.back-link {
  grid-column: 1 / -1;
  width: fit-content;
  min-height: 36px;
  display: inline-flex;
  align-items: center;
}

.back-link:hover {
  border-bottom: 1px solid currentColor;
}

.lead,
.tool-common-hero p:not(.eyebrow),
.case-action-hero p:not(.eyebrow) {
  max-width: 680px;
  color: var(--black-soft);
  font-size: 19px;
  line-height: 1.5;
}

.step-pill {
  width: fit-content;
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  padding: 5px 10px;
}

.tool-hero-indicators,
.maturity-score-card,
.tool-stat-strip {
  grid-column: 2;
  grid-row: 2 / span 4;
  min-height: 190px;
  display: grid;
  align-content: start;
  gap: 8px;
  border: 1px solid rgba(17, 18, 20, 0.38);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(17, 18, 20, 0.032) 1px, transparent 1px),
    linear-gradient(180deg, rgba(17, 18, 20, 0.03) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px, 32px 32px, auto;
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.92) inset, 0 10px 24px rgba(17, 18, 20, 0.08);
  padding: 20px;
}

.maturity-score-visual,
.maturity-score-meta span,
.tool-stat-strip span,
.case-hero-stats span {
  min-height: 44px;
  display: grid;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(251, 250, 246, 0.7);
  padding: 8px 10px;
}

.maturity-score-visual strong,
.tool-stat-strip strong,
.case-hero-stats strong,
.roi-primary-metrics strong,
.roi-secondary-metrics strong,
.roi-metric-list strong {
  color: var(--black);
  font-family: var(--font-title);
  font-size: 28px;
  font-weight: 650;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.maturity-score-copy {
  display: grid;
  gap: 4px;
}

.maturity-score-copy span,
.maturity-score-copy small {
  color: var(--black);
  font-weight: 650;
}

.maturity-score-copy p {
  font-size: 14px;
}

.section,
.case-search-section,
.case-action-workspace,
.case-method-section,
.tool-workspace-section,
.tool-next-section,
.roi-reading-section {
  padding: 40px 0;
}

.maturity-layout,
.roi-layout,
.roi-results {
  display: grid;
  gap: 12px;
}

.maturity-layout,
.roi-layout {
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  align-items: start;
}

.maturity-questions,
.maturity-panel,
.roi-panel,
.roi-key-results,
.roi-summary-card,
.content-card,
.case-search-panel,
.tool-library-panel,
.case-results-panel,
.next-card,
.case-tool-card,
.case-sheet-block,
.roi-field-group,
.roi-primary-metrics div,
.roi-secondary-metrics div,
.roi-reading-cards div,
.case-start-guide dl div {
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(17, 18, 20, 0.3);
  border-radius: 8px;
  background: rgba(251, 250, 246, 0.82);
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.84) inset, 0 6px 18px rgba(17, 18, 20, 0.05);
}

.maturity-questions,
.maturity-panel,
.roi-panel,
.roi-key-results,
.roi-summary-card,
.content-card,
.case-search-panel,
.tool-library-panel,
.next-card {
  padding: 22px;
}

.maturity-questions::after,
.maturity-panel::after,
.roi-panel::after,
.roi-key-results::after,
.roi-summary-card::after,
.content-card::after,
.case-search-panel::after,
.tool-library-panel::after,
.next-card::after,
.case-tool-card::after,
.case-sheet-block::after,
.roi-field-group::after,
.roi-reading-cards div::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 38px;
  height: 38px;
  border-left: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(45deg, transparent 48%, var(--line) 50%, transparent 52%);
  pointer-events: none;
}

.panel-heading,
.compact-heading,
.case-step-heading,
.case-results-bar,
.next-card {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 18px;
}

.actions,
.compact-actions,
.detail-actions,
.contact-actions,
.load-more-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.load-more-row {
  justify-content: center;
  margin-top: 16px;
}

.button,
button.button,
.case-card-cta,
.case-reset-button,
.compact-button,
.danger-button,
.roi-reset-link {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  color: var(--black);
  box-shadow: none;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.2;
  padding: 11px 18px;
  cursor: pointer;
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.button:not(.secondary),
button.button:not(.secondary),
.case-card-cta {
  border-color: var(--black);
  background: var(--black);
  color: var(--ivory);
  box-shadow: 0 1px 0 rgba(244, 242, 236, 0.12) inset, 0 6px 14px rgba(17, 18, 20, 0.12);
}

.button:hover,
button.button:hover,
.case-card-cta:hover,
.case-reset-button:hover,
.compact-button:hover,
.roi-reset-link:hover {
  border-color: var(--mineral-dark);
  background: var(--paper-quiet);
}

.button:not(.secondary):hover,
button.button:not(.secondary):hover,
.case-card-cta:hover {
  border-color: var(--black-soft);
  background: var(--black-soft);
  color: var(--ivory);
}

label,
.form-row,
.tool-search,
.case-select-field {
  display: grid;
  gap: 7px;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  background: var(--paper);
  color: var(--black);
  padding: 11px 12px;
}

textarea {
  resize: vertical;
}

input::placeholder,
textarea::placeholder {
  color: var(--mineral-dark);
}

input[type="range"] {
  height: 36px;
  padding: 0;
  appearance: none;
  background: transparent;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 8px;
  background: linear-gradient(90deg, var(--mineral-dark), rgba(111, 115, 120, 0.24));
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -7px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  background: var(--black);
}

input[type="range"]::-moz-range-track {
  height: 8px;
  background: linear-gradient(90deg, var(--mineral-dark), rgba(111, 115, 120, 0.24));
}

input[type="range"]::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border: 2px solid var(--paper);
  border-radius: 50%;
  background: var(--black);
}

.input-with-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
}

.input-with-unit em,
.axis-value,
.result-count,
.tag,
.case-card-meta small,
.case-quick-starts button {
  width: fit-content;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(251, 250, 246, 0.7);
  color: var(--steel-dark);
  font-style: normal;
  padding: 5px 9px;
}

.input-with-unit em {
  min-width: 54px;
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  white-space: nowrap;
}

.maturity-axis {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(280px, 1fr);
  gap: 18px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding: 20px 0;
}

.maturity-axis:first-child {
  padding-top: 4px;
}

.maturity-axis:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.axis-copy,
.axis-control,
.roi-form-grid,
.roi-field-group,
.roi-metric-list,
.case-search-stack,
.case-filter-groups,
.case-advanced-filters,
.case-grid,
.case-start-guide,
.selected-case-sheet,
.case-sheet-grid,
.mini-gain-form,
.roi-reading-grid,
.roi-primary-metrics,
.roi-secondary-metrics {
  display: grid;
  gap: 12px;
}

.axis-scale {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.maturity-result-note,
.maturity-result-meta,
.roi-next-step {
  border-top: 1px solid var(--line);
  margin-top: 2px;
  padding-top: 12px;
}

.maturity-result-meta {
  display: grid;
  gap: 4px;
}

.maturity-result-meta span {
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.maturity-result-meta strong {
  color: var(--black);
  font-family: var(--font-title);
  font-weight: 650;
}

.case-search-stack {
  margin-top: 18px;
}

.case-filter-groups,
.case-advanced-filters,
.roi-field-group-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.case-quick-starts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.case-quick-panel {
  display: grid;
  gap: 8px;
}

.case-quick-panel > span {
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.case-quick-starts button {
  cursor: pointer;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
}

.case-quick-starts button:hover,
.case-quick-starts button.active,
.case-quick-starts button[aria-pressed="true"] {
  border-color: var(--mineral-dark);
  color: var(--black);
}

.case-advanced-toggle {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border: 1px solid rgba(17, 18, 20, 0.22);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--black);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 0 12px;
  cursor: pointer;
}

.case-advanced-toggle::after {
  content: "+";
}

.case-advanced-toggle[aria-expanded="true"]::after {
  content: "-";
}

.case-filter-hint {
  margin-top: 12px;
  font-size: 14px;
}

.case-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 16px;
}

.case-tool-card {
  min-height: 238px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 20px;
  color: var(--black);
  text-align: left;
  cursor: pointer;
}

.case-tool-card:hover,
.case-tool-card.selected {
  border-color: var(--mineral-dark);
  background: var(--paper);
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.92) inset, 0 8px 22px rgba(17, 18, 20, 0.07);
}

.case-tool-card .case-card-cta {
  min-height: auto;
  justify-self: start;
  border: 0;
  border-bottom: 1px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--black);
  box-shadow: none;
  padding: 0;
}

.case-tool-card:hover .case-card-cta,
.case-tool-card.selected .case-card-cta {
  border-bottom-color: currentColor;
  background: transparent;
  color: var(--black);
}

.case-card-title {
  color: var(--black);
  font-family: var(--font-title);
  font-size: 20px;
  font-weight: 650;
  line-height: 1.12;
}

.case-card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.case-card-cta {
  justify-self: start;
  margin-top: 2px;
}

.empty-state {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper-quiet);
  padding: 16px;
}

.case-start-guide dl {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
}

.case-start-guide dl div {
  padding: 10px;
}

.case-start-guide dt {
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.selected-case-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.case-detail-icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  color: var(--black);
}

.case-detail-icon svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
  stroke-linejoin: miter;
}

.case-detail-tags,
.tag-row,
.checks {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.detail-summary {
  color: var(--black-soft);
  font-size: 18px;
}

.case-sheet-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.case-sheet-block {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.case-check-block,
.case-measure-block {
  grid-column: 1 / -1;
}

.roi-primary-metrics span,
.roi-secondary-metrics span {
  display: block;
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
}

.case-check-list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 18px;
  color: var(--black-soft);
  font-size: 14px;
  line-height: 1.45;
}

.mini-gain-form {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mini-gain-output {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 10px;
  color: var(--black);
  font-weight: 650;
}

.roi-field-group {
  padding: 16px;
}

.roi-field-group + .roi-field-group {
  margin-top: 12px;
}

.roi-primary-metrics,
.roi-secondary-metrics,
.roi-reading-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.roi-primary-metrics div,
.roi-secondary-metrics div,
.roi-reading-cards div {
  padding: 14px;
}

.roi-next-step {
  display: grid;
  gap: 8px;
}

.mobile-collapse-toggle {
  display: none;
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  width: 44px;
  height: 44px;
  display: none;
  place-items: center;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  background: var(--paper);
  color: var(--black);
}

.back-to-top.is-visible {
  display: grid;
}

.back-to-top svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: square;
}

.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--line-dark);
  background: var(--black);
  color: rgba(244, 242, 236, 0.78);
  padding: 14px 0;
}

.footer-simple {
  min-height: 64px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
}

.footer-brand .footer-editor,
.footer-editor,
.footer-simple nav,
.footer-simple nav a {
  color: rgba(244, 242, 236, 0.78);
}

.footer-simple nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
}

.footer-simple nav a:hover {
  color: var(--ivory);
}

@media (max-width: 980px) {
  .tool-common-hero-inner,
  .maturity-layout,
  .roi-layout,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .tool-hero-indicators,
  .maturity-score-card,
  .tool-stat-strip {
    grid-column: 1;
    grid-row: auto;
    min-height: 0;
  }

  .case-filter-groups,
  .case-advanced-filters,
  .roi-field-group-grid,
  .case-sheet-grid,
  .roi-primary-metrics,
  .roi-secondary-metrics,
  .roi-reading-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  body {
    background-size: 56px 56px, 56px 56px, auto;
  }

  .container {
    width: min(calc(100% - 32px), 1180px);
  }

  .nav-bar {
    min-height: 68px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-header.has-mobile-menu .main-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    z-index: 12;
    display: grid;
    min-width: 210px;
    gap: 0;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    background: var(--paper);
    box-shadow: var(--shadow-subtle);
  }

  .site-header.has-mobile-menu .main-nav a {
    min-height: 44px;
    border-bottom: 1px solid var(--line);
    padding: 0 14px;
    color: var(--black);
  }

  .site-header.has-mobile-menu .main-nav a:last-child {
    border-bottom: 0;
  }

  .tool-common-hero-inner {
    padding: 28px 0 24px;
  }

  h1 {
    max-width: 100%;
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

  h3 {
    font-size: 19px;
  }

  .lead,
  .tool-common-hero p:not(.eyebrow),
  .case-action-hero p:not(.eyebrow) {
    font-size: 18px;
  }

  .section,
  .case-search-section,
  .case-action-workspace,
  .case-method-section,
  .tool-workspace-section,
  .tool-next-section,
  .roi-reading-section {
    padding: 34px 0;
  }

  .maturity-questions,
  .maturity-panel,
  .roi-panel,
  .roi-key-results,
  .roi-summary-card,
  .content-card,
  .case-search-panel,
  .tool-library-panel,
  .next-card {
    padding: 18px;
  }

  .panel-heading,
  .compact-heading,
  .case-step-heading,
  .case-results-bar,
  .next-card {
    display: grid;
  }

  .maturity-axis,
  .mini-gain-form,
  .case-start-guide dl,
  .footer-simple {
    grid-template-columns: 1fr;
  }

  .mobile-collapse {
    display: grid;
    gap: 8px;
  }

  .mobile-collapse-toggle {
    width: 100%;
    min-height: 42px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--line-strong);
    border-radius: 4px;
    background: var(--paper);
    color: var(--black);
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 600;
    padding: 0 12px;
  }

  .mobile-collapse-toggle span[aria-hidden="true"]::before {
    content: "+";
  }

  .mobile-collapse-toggle[aria-expanded="true"] span[aria-hidden="true"]::before {
    content: "-";
  }

  .mobile-collapse[data-collapsed="true"] .mobile-collapse-content {
    display: none;
  }

  .footer-simple nav {
    justify-content: flex-start;
    gap: 12px 16px;
  }
}

/* Premium pass for the IA tools. These overrides tighten hierarchy without changing the flows. */
.tool-common-hero-inner {
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.44fr);
  gap: 24px 42px;
  align-items: center;
  padding: 50px 0 42px;
}

.tool-common-hero h1,
.case-action-hero h1 {
  max-width: 780px;
}

.lead,
.tool-common-hero p:not(.eyebrow),
.case-action-hero p:not(.eyebrow) {
  max-width: 720px;
}

.tool-hero-indicators,
.maturity-score-card,
.tool-stat-strip {
  min-height: 0;
  gap: 10px;
  border-color: rgba(17, 18, 20, 0.26);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.62), rgba(251, 250, 246, 0.9));
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.94) inset, 0 8px 22px rgba(17, 18, 20, 0.06);
  padding: 18px;
}

.maturity-score-visual,
.maturity-score-meta span,
.tool-stat-strip span,
.case-hero-stats span {
  min-height: 54px;
  border-color: rgba(17, 18, 20, 0.14);
  background: rgba(255, 255, 255, 0.42);
  padding: 10px 12px;
}

.maturity-score-visual strong,
.tool-stat-strip strong,
.case-hero-stats strong,
.roi-primary-metrics strong,
.roi-secondary-metrics strong,
.roi-metric-list strong {
  font-size: 30px;
}

.maturity-layout,
.roi-layout,
.roi-results {
  gap: 16px;
}

.maturity-layout,
.roi-layout {
  grid-template-columns: minmax(0, 1.18fr) minmax(340px, 0.74fr);
}

.maturity-questions,
.maturity-panel,
.roi-panel,
.roi-key-results,
.roi-summary-card,
.content-card,
.case-search-panel,
.tool-library-panel,
.case-results-panel,
.next-card {
  border-color: rgba(17, 18, 20, 0.22);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6), rgba(251, 250, 246, 0.9));
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.94) inset, 0 8px 24px rgba(17, 18, 20, 0.06);
}

.case-tool-card,
.case-sheet-block,
.roi-field-group,
.roi-primary-metrics div,
.roi-secondary-metrics div,
.roi-reading-cards div,
.case-start-guide dl div {
  border-color: rgba(17, 18, 20, 0.18);
  background: rgba(255, 255, 255, 0.44);
  box-shadow: none;
}

.maturity-questions::after,
.maturity-panel::after,
.roi-panel::after,
.roi-key-results::after,
.roi-summary-card::after,
.content-card::after,
.case-search-panel::after,
.tool-library-panel::after,
.next-card::after,
.case-tool-card::after,
.case-sheet-block::after,
.roi-field-group::after,
.roi-reading-cards div::after {
  width: 24px;
  height: 24px;
  opacity: 0.42;
}

.panel-heading h2,
.compact-heading h2,
.case-step-heading h2 {
  font-size: 32px;
}

.maturity-axis {
  grid-template-columns: minmax(0, 0.72fr) minmax(270px, 1fr);
  gap: 20px;
  padding: 18px 0;
}

.axis-copy p {
  font-size: 15px;
  line-height: 1.48;
}

.axis-value,
.result-count,
.tag,
.case-card-meta small,
.case-quick-starts button,
.input-with-unit em {
  border-color: rgba(17, 18, 20, 0.14);
  background: rgba(255, 255, 255, 0.46);
}

input,
select,
textarea {
  min-height: 44px;
  border-color: rgba(17, 18, 20, 0.22);
  background: rgba(255, 255, 255, 0.58);
  box-shadow: 0 1px 0 rgba(251, 250, 246, 0.7) inset;
}

input[type="range"]::-webkit-slider-runnable-track {
  height: 10px;
  border: 1px solid rgba(17, 18, 20, 0.14);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(17, 18, 20, 0.68), rgba(17, 18, 20, 0.16));
}

input[type="range"]::-webkit-slider-thumb {
  width: 20px;
  height: 20px;
  margin-top: -6px;
  box-shadow: 0 0 0 4px rgba(17, 18, 20, 0.06), 0 4px 10px rgba(17, 18, 20, 0.16);
}

input[type="range"]::-moz-range-track {
  height: 10px;
  border: 1px solid rgba(17, 18, 20, 0.14);
  border-radius: 999px;
  background: linear-gradient(90deg, rgba(17, 18, 20, 0.68), rgba(17, 18, 20, 0.16));
}

input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  box-shadow: 0 0 0 4px rgba(17, 18, 20, 0.06), 0 4px 10px rgba(17, 18, 20, 0.16);
}

.case-search-panel {
  padding: 26px 28px;
}

.case-step-heading {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  align-items: start;
}

.case-step-number {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(17, 18, 20, 0.18);
  border-radius: 6px;
  background: var(--black);
  color: var(--ivory);
}

.case-search-stack {
  gap: 14px;
  margin-top: 22px;
}

.case-filter-groups {
  grid-template-columns: minmax(240px, 1.15fr) auto repeat(3, minmax(150px, 0.8fr));
  align-items: end;
}

.case-filter-groups .case-advanced-inline {
  display: contents;
}

.case-grid {
  gap: 10px;
}

.case-tool-card {
  min-height: 224px;
  grid-template-rows: auto auto minmax(0, 1fr) auto;
  padding: 18px;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, box-shadow 160ms ease;
}

.case-tool-card:hover,
.case-tool-card.selected {
  transform: none;
}

.case-card-title {
  font-size: 19px;
}

.case-card-cta {
  align-self: end;
  margin-top: 4px;
}

.roi-field-group {
  padding: 18px;
}

.roi-field-group-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.input-with-unit {
  grid-template-columns: minmax(0, 1fr) minmax(58px, max-content);
  gap: 8px;
}

.roi-primary-metrics,
.roi-secondary-metrics,
.roi-reading-grid {
  gap: 10px;
}

.roi-primary-metrics div,
.roi-secondary-metrics div,
.roi-reading-cards div {
  min-height: 96px;
  padding: 16px;
}

.button,
button.button,
.case-card-cta,
.case-reset-button,
.compact-button,
.roi-reset-link {
  transition: transform 160ms ease, background-color 160ms ease, border-color 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.button:hover,
button.button:hover,
.case-card-cta:hover,
.case-reset-button:hover,
.compact-button:hover,
.roi-reset-link:hover {
  transform: none;
}

@media (min-width: 981px) {
  .maturity-results,
  .roi-results {
    position: sticky;
    top: 86px;
  }
}

.tool-next-section .next-card {
  align-items: center;
  padding: 22px;
}

@media (max-width: 980px) {
  .tool-common-hero-inner,
  .maturity-layout,
  .roi-layout,
  .case-filter-groups,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .case-filter-groups .case-advanced-inline {
    display: grid;
    grid-template-columns: 1fr;
  }

  .roi-field-group-grid,
  .roi-primary-metrics,
  .roi-secondary-metrics,
  .roi-reading-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .tool-common-hero-inner {
    padding: 30px 0 26px;
  }

  .case-search-panel,
  .maturity-questions,
  .maturity-panel,
  .roi-panel,
  .roi-key-results,
  .roi-summary-card,
  .content-card,
  .tool-library-panel,
  .next-card {
    padding: 18px;
  }

  .maturity-axis,
  .case-step-heading,
  .tool-next-section .next-card {
    grid-template-columns: 1fr;
  }
}

/* Final UI bug fixes: remove corner artefacts and clean dense detail panels. */
.maturity-questions::after,
.maturity-panel::after,
.roi-panel::after,
.roi-key-results::after,
.roi-summary-card::after,
.content-card::after,
.case-search-panel::after,
.tool-library-panel::after,
.next-card::after,
.case-tool-card::after,
.case-sheet-block::after,
.roi-field-group::after,
.roi-reading-cards div::after {
  content: none;
  display: none;
}

.case-reset-button {
  width: fit-content;
  min-height: 40px;
  justify-self: start;
  padding: 9px 14px;
}

.result-count {
  min-height: 34px;
  white-space: nowrap;
}

.selected-case-sheet {
  gap: 16px;
}

.selected-case-head {
  grid-template-columns: 1fr;
  gap: 8px;
  border-bottom: 1px solid rgba(17, 18, 20, 0.12);
  padding-bottom: 12px;
}

.case-detail-icon {
  display: none;
}

.selected-case-head h3 {
  margin-top: 4px;
  font-size: 20px;
  line-height: 1.14;
}

.selected-case-head .case-detail-tags {
  margin-top: 8px;
}

.detail-summary {
  font-size: 16px;
  line-height: 1.5;
}

.selected-case-sheet .case-sheet-grid > .case-sheet-block:nth-child(3) {
  grid-column: 1 / -1;
}

.case-sheet-block h4 {
  font-size: 15px;
}

.case-sheet-block small {
  color: var(--steel-dark);
  line-height: 1.45;
}

.check-item {
  width: fit-content;
  border: 1px solid rgba(17, 18, 20, 0.14);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.5);
  color: var(--steel-dark);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.3;
  padding: 5px 8px;
}

.roi-key-results .roi-primary-metrics,
.roi-key-results .roi-secondary-metrics {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.roi-key-results .roi-primary-metrics > div:nth-child(3),
.roi-key-results .roi-secondary-metrics > div:nth-child(3) {
  grid-column: 1 / -1;
}

.roi-key-results .roi-primary-metrics div,
.roi-key-results .roi-secondary-metrics div {
  min-height: 88px;
}

.roi-field-group-grid > label:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

@media (max-width: 680px) {
  .case-reset-button {
    width: 100%;
    justify-self: stretch;
  }

  .tool-common-hero-inner {
    gap: 16px;
    padding: 26px 0 20px;
  }

  .back-link {
    min-height: 28px;
  }

  .tool-hero-indicators,
  .tool-stat-strip {
    gap: 6px;
    padding: 10px;
  }

  .tool-stat-strip,
  .case-hero-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tool-stat-strip span,
  .case-hero-stats span {
    min-height: 0;
    align-content: start;
    padding: 8px;
  }

  .tool-stat-strip strong,
  .case-hero-stats strong {
    font-size: 22px;
  }

  .case-search-section,
  .case-action-workspace,
  .case-method-section,
  .tool-workspace-section,
  .tool-next-section,
  .roi-reading-section {
    padding: 24px 0;
  }

  .case-search-panel,
  .tool-library-panel,
  .next-card {
    padding: 14px;
  }

  .case-step-number {
    display: none;
  }

  .panel-heading h2,
  .compact-heading h2,
  .case-step-heading h2 {
    font-size: 24px;
  }

  .case-advanced-toggle {
    width: 100%;
    justify-content: space-between;
  }

  .case-quick-starts {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .case-quick-starts button {
    justify-content: center;
    min-height: 38px;
    padding: 0 8px;
    white-space: normal;
  }

  .case-tool-card {
    min-height: 0;
    gap: 8px;
    padding: 14px;
  }

  .case-card-title {
    font-size: 17px;
  }

  .case-card-cta {
    min-height: 38px;
    padding: 9px 12px;
  }

  .case-results-bar {
    gap: 8px;
  }

  .result-count {
    justify-self: start;
  }

  .case-sheet-grid,
  .mini-gain-form,
  .roi-key-results .roi-primary-metrics,
  .roi-key-results .roi-secondary-metrics {
    grid-template-columns: 1fr;
  }

  .roi-field-group-grid > label:last-child:nth-child(odd),
  .roi-key-results .roi-primary-metrics > div:nth-child(3),
  .roi-key-results .roi-secondary-metrics > div:nth-child(3) {
    grid-column: auto;
  }
}

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