/* Evidence-led Operational Briefing — homepage only. */
.evidence-home {
  --brief-navy: #071c31;
  --brief-navy-raised: #102b46;
  --brief-teal: #075c57;
  --brief-teal-soft: #e9f4f2;
  --brief-coral: #a63f38;
  --brief-coral-soft: #fbeceb;
  --brief-ink: #142536;
  --brief-muted: #4d5e6f;
  --brief-line: #c8d5dc;
  --brief-surface: #f5f8fa;
  --brief-white: #ffffff;
  color: var(--brief-ink);
  overflow: clip;
}
.evidence-home *,
.evidence-home *::before,
.evidence-home *::after {
  box-sizing: border-box;
}

.evidence-home :where(a, button, summary) {
  scroll-margin-top: 7rem;
}

.evidence-home :where(a, button, summary):focus-visible {
  outline: 3px solid #f4a261;
  outline-offset: 3px;
  box-shadow: 0 0 0 2px var(--brief-navy);
}

.evidence-home :where(.button, .audience-tabs button, .audience-panel a, .delivery-spine a, .connected-systems-grid a, .role-card summary, .proof-class-grid a) {
  min-height: 44px;
}

.brief-hero {
  position: relative;
  padding: clamp(4.5rem, 8vw, 8rem) 0 clamp(4rem, 7vw, 7rem);
  color: var(--brief-white);
  background:
    linear-gradient(120deg, rgba(7, 92, 87, 0.34), transparent 46%),
    linear-gradient(245deg, rgba(166, 63, 56, 0.22), transparent 40%),
    var(--brief-navy);
}

.brief-hero::after {
  position: absolute;
  inset: auto 0 0;
  height: 6px;
  content: "";
  background: linear-gradient(90deg, var(--brief-teal) 0 58%, var(--brief-coral) 58% 100%);
}

.brief-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(34rem, 1.12fr);
  gap: clamp(2rem, 5vw, 5.5rem);
  align-items: start;
}

.brief-hero-copy {
  padding-top: clamp(0.25rem, 2vw, 1.5rem);
}

.brief-hero .eyebrow {
  max-width: 34rem;
  color: #9ce2dc;
  letter-spacing: 0.13em;
}

.brief-hero h1 {
  max-width: 13ch;
  margin: 0.75rem 0 1.25rem;
  color: var(--brief-white);
  font-size: clamp(2.6rem, 5.1vw, 5.35rem);
  line-height: 0.99;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

.brief-hero .hero-copy {
  max-width: 46rem;
  color: #d9e5ec;
  font-size: clamp(1.05rem, 1.35vw, 1.3rem);
  line-height: 1.65;
}

.brief-hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.brief-hero .button-secondary {
  border-color: #b9d4df;
  color: var(--brief-white);
  background: rgba(7, 28, 49, 0.38);
}

.audience-pathfinder {
  min-width: 0;
  padding: clamp(1.25rem, 2.5vw, 2rem);
  color: var(--brief-ink);
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 1.25rem;
  background: var(--brief-white);
  box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.22);
}

.audience-pathfinder-heading .panel-kicker,
.audience-pathfinder-heading h2,
.audience-pathfinder-heading p {
  margin-top: 0;
}

.audience-pathfinder-heading .panel-kicker {
  color: var(--brief-teal);
}

.audience-pathfinder-heading h2 {
  margin-bottom: 0.7rem;
  color: var(--brief-navy);
  font-size: clamp(1.55rem, 2.3vw, 2.15rem);
  line-height: 1.12;
}

.audience-pathfinder-heading > p:last-child {
  color: var(--brief-muted);
  line-height: 1.55;
}

.audience-tabs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.5rem;
  margin: 1.4rem 0 1rem;
}

.audience-tabs button {
  display: flex;
  min-width: 0;
  padding: 0.75rem;
  align-items: flex-start;
  gap: 0.55rem;
  color: var(--brief-ink);
  border: 1px solid var(--brief-line);
  border-radius: 0.65rem;
  background: var(--brief-surface);
  font: inherit;
  font-size: 0.83rem;
  font-weight: 750;
  line-height: 1.25;
  text-align: left;
  cursor: pointer;
}

.audience-tabs button span {
  flex: 0 0 auto;
  color: var(--brief-teal);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
}

.audience-tabs button[aria-selected="true"] {
  color: var(--brief-white);
  border-color: var(--brief-navy);
  background: var(--brief-navy);
}

.audience-tabs button[aria-selected="true"] span {
  color: #9ce2dc;
}

.audience-panel {
  min-width: 0;
  padding: 1.15rem;
  border: 1px solid var(--brief-line);
  border-left: 4px solid var(--brief-teal);
  border-radius: 0.75rem;
  background: var(--brief-white);
}

.audience-panel + .audience-panel {
  margin-top: 0.9rem;
}

html.audience-pathfinder-ready .audience-panel[hidden] {
  display: none;
}

.audience-panel > p {
  margin: 0 0 0.85rem;
  color: var(--brief-muted);
  line-height: 1.5;
}

.audience-destinations {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.audience-destinations li {
  min-width: 0;
}

.audience-destinations a {
  display: flex;
  height: 100%;
  padding: 0.65rem 0.7rem;
  align-items: center;
  color: var(--brief-navy);
  border: 1px solid var(--brief-line);
  border-radius: 0.55rem;
  background: var(--brief-surface);
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.3;
  text-decoration: none;
  overflow-wrap: anywhere;
}

.audience-destinations a:hover,
.audience-destinations a:focus-visible {
  border-color: var(--brief-teal);
  background: var(--brief-teal-soft);
}

.audience-panel-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.55rem;
  margin-top: 0.75rem;
}

.audience-panel-actions a {
  display: flex;
  padding: 0.6rem 0;
  flex-direction: column;
  justify-content: center;
  color: var(--brief-teal);
  font-size: 0.83rem;
  font-weight: 750;
  line-height: 1.3;
  text-underline-offset: 0.2em;
}

.audience-panel-actions a span {
  color: var(--brief-muted);
  font-size: 0.67rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.audience-status {
  min-height: 1.4em;
  margin: 0.85rem 0 0;
  color: var(--brief-muted);
  font-size: 0.78rem;
}

.evidence-home > .section {
  padding-block: clamp(4rem, 7vw, 7rem);
}

.brief-section-heading {
  display: grid;
  align-items: end;
  margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.brief-section-heading .section-kicker,
.brief-section-heading h2,
.brief-section-heading > p {
  margin-top: 0;
}

.brief-section-heading .section-kicker {
  color: var(--brief-teal);
}

.brief-section-heading h2 {
  max-width: 21ch;
  margin-bottom: 0;
  color: var(--brief-navy);
  font-size: clamp(2rem, 3.7vw, 3.65rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  text-wrap: balance;
}

.brief-section-heading > p {
  margin-bottom: 0;
  color: var(--brief-muted);
  font-size: 1.05rem;
  line-height: 1.65;
}

.delivery-spine-section {
  background: var(--brief-white);
}

.delivery-spine {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0;
  margin-bottom: 0;
  padding-top: 1.25rem;
  list-style: none;
}

.delivery-spine::before {
  position: absolute;
  top: 0;
  right: 2.5%;
  left: 2.5%;
  height: 2px;
  content: "";
  background: linear-gradient(90deg, var(--brief-teal), var(--brief-coral));
}

.delivery-spine > li {
  position: relative;
  display: flex;
  min-width: 0;
  padding: 1rem;
  flex-direction: column;
  border: 1px solid var(--brief-line);
  border-radius: 0.75rem;
  background: var(--brief-surface);
}

.delivery-spine > li::before {
  position: absolute;
  top: -1.55rem;
  left: 1rem;
  width: 0.65rem;
  height: 0.65rem;
  content: "";
  border: 2px solid var(--brief-white);
  border-radius: 50%;
  background: var(--brief-teal);
  box-shadow: 0 0 0 2px var(--brief-teal);
}

.delivery-spine > li:last-child::before {
  background: var(--brief-coral);
  box-shadow: 0 0 0 2px var(--brief-coral);
}

.spine-stage-heading {
  display: flex;
  min-height: 3.25rem;
  gap: 0.55rem;
  align-items: baseline;
}

.spine-stage-heading span,
.connected-systems-grid article > span {
  color: var(--brief-teal);
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.spine-stage-heading h3 {
  margin: 0;
  color: var(--brief-navy);
  font-size: 1rem;
  line-height: 1.25;
}

.delivery-spine dl {
  margin: 0;
}

.delivery-spine dl div {
  padding: 0.65rem 0;
  border-top: 1px solid var(--brief-line);
}

.delivery-spine dt,
.role-card dt {
  color: var(--brief-muted);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.07em;
  text-transform: uppercase;
}

.delivery-spine dd,
.role-card dd {
  margin: 0.25rem 0 0;
  color: var(--brief-ink);
  font-size: 0.86rem;
  line-height: 1.45;
}

.delivery-spine > li > a {
  display: inline-flex;
  margin-top: auto;
  padding-top: 0.65rem;
  align-items: center;
  color: var(--brief-teal);
  font-weight: 800;
  text-underline-offset: 0.2em;
}

.connected-systems-section {
  border-block: 1px solid var(--brief-line);
  background: var(--brief-surface);
}

.connected-systems-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.connected-systems-grid article {
  display: flex;
  min-width: 0;
  min-height: 17rem;
  padding: clamp(1.25rem, 2vw, 1.75rem);
  flex-direction: column;
  border: 1px solid var(--brief-line);
  border-top: 4px solid var(--brief-teal);
  border-radius: 0.85rem;
  background: var(--brief-white);
}

.connected-systems-grid h3 {
  margin: 0.8rem 0 0.65rem;
  color: var(--brief-navy);
  font-size: clamp(1.15rem, 1.6vw, 1.45rem);
  line-height: 1.18;
}

.connected-systems-grid p {
  margin: 0;
  color: var(--brief-muted);
  line-height: 1.55;
}

.connected-systems-grid a {
  display: inline-flex;
  margin-top: auto;
  padding-top: 1rem;
  align-items: center;
  color: var(--brief-teal);
  font-weight: 800;
  text-underline-offset: 0.2em;
}

.connected-systems-grid .connected-system-featured {
  color: var(--brief-white);
  border-color: var(--brief-teal);
  border-top-color: #9ce2dc;
  background: var(--brief-teal);
}

.connected-systems-grid .connected-system-featured > span,
.connected-systems-grid .connected-system-featured h3,
.connected-systems-grid .connected-system-featured a {
  color: var(--brief-white);
}

.connected-systems-grid .connected-system-featured p {
  color: #e0f2f0;
}

.brief-section-action {
  display: flex;
  margin-top: 2rem;
  justify-content: flex-end;
}

.lifecycle-section {
  color: var(--brief-white);
  background:
    linear-gradient(115deg, rgba(7, 92, 87, 0.28), transparent 45%),
    var(--brief-navy);
}

.brief-section-heading-dark .section-kicker {
  color: #9ce2dc;
}

.brief-section-heading-dark h2 {
  color: var(--brief-white);
}

.brief-section-heading-dark > p {
  color: #d9e5ec;
}

.lifecycle-rail {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  margin-block: 0;
  padding: 0;
  list-style: none;
  border: 1px solid rgba(255, 255, 255, 0.24);
  border-radius: 0.9rem;
  overflow: hidden;
}

.lifecycle-rail li {
  position: relative;
  min-width: 0;
  padding: clamp(1rem, 2vw, 1.5rem);
  background: rgba(255, 255, 255, 0.04);
}

.lifecycle-rail li + li {
  border-left: 1px solid rgba(255, 255, 255, 0.24);
}

.lifecycle-rail li:not(:last-child)::after {
  position: absolute;
  z-index: 1;
  top: 1.15rem;
  right: -0.48rem;
  width: 0.9rem;
  height: 0.9rem;
  content: "";
  border-top: 2px solid #9ce2dc;
  border-right: 2px solid #9ce2dc;
  background: var(--brief-navy-raised);
  transform: rotate(45deg);
}

.lifecycle-rail span,
.lifecycle-rail strong {
  display: block;
}

.lifecycle-rail span {
  color: #9ce2dc;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.lifecycle-rail strong {
  margin-top: 0.65rem;
  color: var(--brief-white);
  font-size: 1.15rem;
}

.lifecycle-rail p {
  margin-bottom: 0;
  color: #d9e5ec;
  font-size: 0.9rem;
  line-height: 1.55;
}

.brief-section-action-dark .button-secondary {
  border-color: #b9d4df;
  color: var(--brief-white);
  background: rgba(255, 255, 255, 0.06);
}

.role-model-section {
  background: var(--brief-white);
}

.role-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
}

.role-card {
  min-width: 0;
  border: 1px solid var(--brief-line);
  border-radius: 0.75rem;
  background: var(--brief-surface);
  overflow: clip;
}

.role-card[open] {
  border-color: var(--brief-teal);
  background: var(--brief-white);
  box-shadow: inset 4px 0 0 var(--brief-teal);
}

.role-card summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  align-items: center;
  color: var(--brief-navy);
  cursor: pointer;
}

.role-card summary span {
  color: var(--brief-teal);
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.08em;
}

.role-card summary strong {
  font-size: 1rem;
}

.role-card summary small {
  color: var(--brief-muted);
  font-size: 0.76rem;
}

.role-card[open] summary small::before {
  content: "Hide ";
}

.role-card:not([open]) summary small::before {
  content: "Open ";
}

.role-card dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin: 0;
  padding: 0 1.1rem 1.1rem;
}

.role-card dl div {
  min-width: 0;
  padding: 0.8rem;
  border-top: 1px solid var(--brief-line);
}

.role-card dl div:nth-child(odd) {
  border-right: 1px solid var(--brief-line);
}

.role-model-boundary {
  display: flex;
  gap: 1.5rem;
  margin-top: 1.5rem;
  padding: 1.15rem 1.3rem;
  align-items: center;
  justify-content: space-between;
  border-left: 4px solid var(--brief-coral);
  background: var(--brief-coral-soft);
}

.role-model-boundary p {
  margin: 0;
  color: var(--brief-ink);
  font-weight: 700;
}

.proof-section {
  border-block: 1px solid var(--brief-line);
  background: var(--brief-surface);
}

.proof-class-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.proof-class-grid article {
  display: flex;
  min-width: 0;
  min-height: 18rem;
  padding: 1.3rem;
  flex-direction: column;
  border: 1px solid var(--brief-line);
  border-radius: 0.75rem;
  background: var(--brief-white);
}

.proof-class-grid article > span {
  display: inline-flex;
  width: fit-content;
  min-height: 2rem;
  padding: 0.35rem 0.55rem;
  align-items: center;
  color: var(--brief-teal);
  border: 1px solid #a8cbc7;
  border-radius: 999px;
  background: var(--brief-teal-soft);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.proof-class-grid article[data-proof-class="synthetic-proof-of-approach"] > span {
  color: var(--brief-coral);
  border-color: #dfb4b0;
  background: var(--brief-coral-soft);
}

.proof-class-grid h3 {
  margin: 1rem 0 0.6rem;
  color: var(--brief-navy);
  font-size: 1.2rem;
  line-height: 1.25;
}

.proof-class-grid p {
  margin: 0;
  color: var(--brief-muted);
  line-height: 1.55;
}

.proof-class-grid a {
  display: inline-flex;
  margin-top: auto;
  padding-top: 1rem;
  align-items: center;
  color: var(--brief-teal);
  font-weight: 800;
  text-underline-offset: 0.2em;
}

.final-session-section {
  background: var(--brief-white);
}

.final-session-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(1.5rem, 5vw, 5rem);
  padding: clamp(2rem, 5vw, 4rem);
  align-items: center;
  color: var(--brief-white);
  border-radius: 1rem;
  background:
    linear-gradient(110deg, rgba(7, 92, 87, 0.34), transparent 52%),
    var(--brief-navy);
}

.final-session-panel .section-kicker {
  color: #9ce2dc;
}

.final-session-panel h2 {
  max-width: 24ch;
  margin-block: 0.5rem 0.8rem;
  color: var(--brief-white);
  font-size: clamp(1.8rem, 3.3vw, 3.25rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.final-session-panel p:last-child {
  max-width: 48rem;
  margin-bottom: 0;
  color: #d9e5ec;
  line-height: 1.6;
}

@media (min-width: 1366px) {
  .brief-hero-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(38rem, 1.1fr);
  }

  .connected-systems-grid article {
    min-height: 18rem;
  }
}

@media (max-width: 1100px) {
  .brief-hero-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .brief-hero-copy {
    max-width: 54rem;
  }

  .audience-pathfinder {
    max-width: none;
  }

  .delivery-spine {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
    padding-top: 0;
  }

  .delivery-spine::before,
  .delivery-spine > li::before {
    display: none;
  }

  .delivery-spine > li:last-child {
    grid-column: 1 / -1;
  }

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

  .lifecycle-rail {
    grid-template-columns: repeat(5, minmax(12rem, 1fr));
    overflow-x: auto;
    overscroll-behavior-inline: contain;
  }

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

@media (max-width: 768px) {
  .brief-hero {
    padding-top: 3.5rem;
  }

  .brief-hero h1 {
    font-size: clamp(2.45rem, 11vw, 4.25rem);
  }

  .audience-tabs,
  .audience-destinations,
  .audience-panel-actions,
  .brief-section-heading,
  .delivery-spine,
  .connected-systems-grid,
  .role-card-grid,
  .proof-class-grid,
  .final-session-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .audience-tabs button {
    align-items: center;
  }

  .audience-panel-actions a {
    padding-block: 0.7rem;
  }

  .brief-section-heading {
    align-items: start;
  }

  .delivery-spine > li:last-child {
    grid-column: auto;
  }

  .connected-systems-grid article,
  .proof-class-grid article {
    min-height: 0;
  }

  .lifecycle-rail {
    grid-template-columns: minmax(0, 1fr);
    overflow: visible;
  }

  .lifecycle-rail li + li {
    border-top: 1px solid rgba(255, 255, 255, 0.24);
    border-left: 0;
  }

  .lifecycle-rail li:not(:last-child)::after {
    top: auto;
    right: 1.2rem;
    bottom: -0.45rem;
    transform: rotate(135deg);
  }

  .role-model-boundary {
    align-items: stretch;
    flex-direction: column;
  }

  .role-model-boundary .button,
  .final-session-panel .button {
    width: 100%;
    justify-content: center;
  }

  .brief-section-action {
    justify-content: stretch;
  }

  .brief-section-action .button {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 390px) {
  .brief-hero-grid,
  .brief-section-heading {
    gap: 1.25rem;
  }

  .brief-hero .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .brief-hero .hero-actions .button {
    width: 100%;
    justify-content: center;
  }

  .audience-pathfinder {
    padding: 1rem;
    border-radius: 0.85rem;
  }

  .audience-panel {
    padding: 0.9rem;
  }

  .role-card summary {
    grid-template-columns: auto minmax(0, 1fr);
  }

  .role-card summary small {
    grid-column: 2;
  }

  .role-card dl {
    grid-template-columns: minmax(0, 1fr);
  }

  .role-card dl div:nth-child(odd) {
    border-right: 0;
  }
}

@media (max-width: 340px) {
  .brief-hero h1 {
    font-size: 2.25rem;
  }

  .audience-tabs button,
  .delivery-spine > li,
  .connected-systems-grid article,
  .proof-class-grid article {
    padding-inline: 0.85rem;
  }
}