.board-section {
  padding: clamp(5rem, 10vw, 9rem) var(--page-padding);
  border-bottom: 1px solid var(--ink);
}

.board-section > * {
  max-width: var(--content-width);
  margin-inline: auto;
}

.board-section-dark {
  background: var(--ink);
  color: var(--surface);
}

.section-heading {
  display: grid;
  gap: 1.25rem;
  margin-bottom: clamp(2.5rem, 6vw, 5rem);
}

.section-heading p:not(.route-label) {
  max-width: 66ch;
  margin: 0;
  color: var(--muted);
}

.board-section-dark .section-heading p:not(.route-label) {
  color: #c5cdd2;
}

.section-heading-split {
  grid-template-columns: minmax(0, 1.4fr) minmax(18rem, 0.6fr);
  align-items: end;
  gap: 3rem;
}

.signal-ledger {
  border-block: 1px solid #626c74;
}

.signal-row {
  display: grid;
  grid-template-columns: 0.65fr 0.9fr 1.2fr 1.2fr 0.55fr;
  align-items: center;
  gap: 1rem;
  min-height: 5.5rem;
  border-bottom: 1px solid #3f484f;
  padding: 0.9rem 0;
}

.signal-row:last-child {
  border-bottom: 0;
}

.signal-route {
  color: #8eb3eb;
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.signal-value {
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
}

.signal-meaning,
.signal-limit {
  color: #d7dce0;
  font-size: 0.82rem;
}

.signal-source {
  justify-self: end;
  color: #8eb3eb;
  font-size: 0.72rem;
}

.interpretation-rule {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr;
  gap: 1rem;
  margin-top: 2.5rem;
  border: 1px solid #626c74;
  padding: 1.25rem;
}

.interpretation-rule strong {
  color: #8eb3eb;
  font-size: 0.75rem;
  text-transform: uppercase;
}

.interpretation-rule p {
  margin: 0;
  color: #d7dce0;
  font-size: 0.84rem;
}

.audience-board {
  background: #e7ece9;
}

.party-map {
  position: relative;
  min-height: 30rem;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(2, 1fr);
  gap: 2rem;
  align-items: center;
}

.party-role {
  position: relative;
  z-index: 2;
  min-height: 12rem;
  border: 1px solid var(--ink);
  background: var(--surface);
  padding: 1.5rem;
}

.party-role > span {
  width: 3rem;
  height: 3rem;
  display: grid;
  place-items: center;
  margin-bottom: 1.25rem;
  border: 2px solid var(--ink);
  border-radius: 50%;
  font-weight: 750;
}

.party-role p {
  color: var(--muted);
}

.party-host {
  grid-column: 1 / span 5;
  grid-row: 1 / span 2;
  min-height: 20rem;
  align-self: center;
  background: var(--rail-blue);
  color: var(--surface);
}

.party-host > span {
  border-color: var(--surface);
}

.party-host p {
  color: #e4edfb;
}

.party-role:nth-of-type(2) {
  grid-column: 7 / span 3;
}

.party-role:nth-of-type(3) {
  grid-column: 10 / span 3;
}

.party-role:nth-of-type(4) {
  grid-column: 8 / span 4;
  grid-row: 2;
}

.party-connection {
  position: absolute;
  z-index: 1;
  height: 2px;
  background: var(--rail-blue);
  transform-origin: left center;
}

.party-connection::after {
  content: "";
  position: absolute;
  right: -0.4rem;
  top: -0.34rem;
  width: 0.65rem;
  height: 0.65rem;
  border: 2px solid var(--rail-blue);
  border-radius: 50%;
  background: var(--paper);
}

.party-connection-a {
  top: 32%;
  left: 38%;
  width: 24%;
  transform: rotate(-7deg);
}

.party-connection-b {
  top: 49%;
  left: 38%;
  width: 49%;
  transform: rotate(-3deg);
}

.party-connection-c {
  top: 61%;
  left: 38%;
  width: 35%;
  transform: rotate(11deg);
}

.audience-unknowns {
  display: grid;
  grid-template-columns: 0.5fr 1.5fr;
  gap: 2rem;
  margin-top: 2rem;
  border-top: 2px solid var(--ink);
  padding-top: 1.5rem;
}

.audience-unknowns strong {
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
  text-transform: uppercase;
}

.audience-unknowns ul,
.omitted-costs ul {
  columns: 2;
  margin: 0;
  padding-left: 1.2rem;
}

.competition-board {
  background: var(--surface);
}

.competitor-axis {
  border: 1px solid var(--ink);
}

.competitor-axis-head,
.competitor-row {
  display: grid;
  grid-template-columns: 0.9fr 1.25fr 1.2fr 1.35fr;
}

.competitor-axis-head {
  background: var(--ink);
  color: var(--surface);
}

.competitor-axis-head span,
.competitor-row > * {
  padding: 0.9rem 1rem;
  border-inline-end: 1px solid var(--divider);
}

.competitor-axis-head span:last-child,
.competitor-row > *:last-child {
  border-inline-end: 0;
}

.competitor-axis-head span {
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.competitor-row {
  border-bottom: 1px solid var(--divider);
}

.competitor-row:last-child {
  border-bottom: 0;
}

.competitor-row > * {
  font-size: 0.82rem;
}

.competitor-row strong {
  color: var(--rail-blue);
}

.competitor-row-own {
  background: #e8f0fc;
}

.text-action {
  min-height: 44px;
  margin-top: 1.5rem;
  border: 0;
  background: transparent;
  color: var(--rail-blue);
  padding: 0;
  font-weight: 750;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 0.3rem;
}

.section-evidence-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--divider);
}

.section-evidence-links strong {
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.section-evidence-links a {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: var(--rail-blue);
  font-size: 0.75rem;
  font-weight: 700;
}

.risk-board .section-evidence-links {
  border-color: #69747c;
}

.risk-board .section-evidence-links strong {
  color: var(--surface);
}

.risk-board .section-evidence-links a {
  color: #d8e6fa;
}

.gtm-board {
  background: #f2f5f3;
}

.channel-table {
  border: 1px solid var(--ink);
  background: var(--surface);
}

.channel-row {
  display: grid;
  grid-template-columns: 1fr 0.7fr 1.35fr 1.35fr;
  border-bottom: 1px solid var(--divider);
}

.channel-row:last-child {
  border-bottom: 0;
}

.channel-row > * {
  padding: 1rem;
  border-inline-end: 1px solid var(--divider);
}

.channel-row > *:last-child {
  border-inline-end: 0;
}

.channel-row-head {
  background: var(--ink);
  color: var(--surface);
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.channel-row strong {
  color: var(--rail-blue);
}

.channel-row span {
  font-size: 0.82rem;
}

.channel-state {
  color: #713900;
  font-weight: 750;
}

.channel-formula {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  margin-top: 1.5rem;
  border: 1px solid var(--ink);
  padding: 1rem;
}

.channel-formula strong {
  color: var(--rail-blue);
  font-size: 0.76rem;
}

.channel-formula code {
  overflow-wrap: anywhere;
  font-family: ui-monospace, "SFMono-Regular", monospace;
  font-size: 0.8rem;
}

.product-board {
  background: #dfe8f6;
}

.product-promise {
  display: grid;
  grid-template-columns: 0.45fr 1.55fr;
  gap: 3rem;
  align-items: start;
}

.product-promise .route-label {
  grid-column: 1;
}

.product-promise blockquote {
  grid-column: 2;
  grid-row: 1 / span 2;
  max-width: 18ch;
  margin: 0;
  font-family: var(--display);
  font-size: clamp(3rem, 6vw, 5.5rem);
  line-height: 0.93;
  text-transform: uppercase;
}

.product-promise blockquote strong {
  display: block;
  color: var(--rail-blue);
}

.product-promise > p:last-child {
  grid-column: 1;
  color: var(--muted);
}

.feature-lines {
  margin-top: clamp(4rem, 8vw, 7rem);
  border-top: 2px solid var(--ink);
}

.feature-line {
  display: grid;
  grid-template-columns: 0.8fr 0.5fr 1.25fr 1.4fr;
  gap: 1.5rem;
  align-items: start;
  border-bottom: 1px solid #97a6b8;
  padding: 1.5rem 0;
}

.feature-line h3 {
  font-family: var(--display);
  font-size: 1.8rem;
  text-transform: uppercase;
}

.feature-line ul {
  margin: 0;
  padding-left: 1.1rem;
}

.feature-line li,
.feature-line p {
  font-size: 0.85rem;
}

.feature-line p {
  margin: 0;
  color: #38444e;
}

.architecture-flow {
  display: flex;
  align-items: stretch;
  margin-top: 4rem;
  overflow-x: auto;
  border: 1px solid var(--ink);
  background: var(--surface);
}

.architecture-flow span {
  min-width: 9.5rem;
  display: grid;
  place-items: center;
  padding: 1rem;
  font-size: 0.76rem;
  font-weight: 700;
  text-align: center;
}

.architecture-flow i {
  display: grid;
  place-items: center;
  color: var(--rail-blue);
  font-style: normal;
}

.architecture-note {
  max-width: 72ch;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.economics-board {
  background: var(--paper);
}

.cost-table {
  border: 1px solid var(--ink);
}

.cost-row {
  display: grid;
  grid-template-columns: 0.8fr repeat(3, 1fr);
  border-bottom: 1px solid var(--divider);
}

.cost-row:last-child {
  border-bottom: 0;
}

.cost-row > * {
  padding: 1rem;
  border-inline-end: 1px solid var(--divider);
}

.cost-row > *:last-child {
  border-inline-end: 0;
}

.cost-row-head {
  background: var(--ink);
  color: var(--surface);
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
}

.cost-row strong {
  color: var(--rail-blue);
}

.economics-rail {
  display: grid;
  grid-template-columns: 1fr 1.1fr 1.2fr;
  margin-top: 2rem;
  border: 1px solid var(--ink);
}

.economics-rail > div {
  min-height: 10rem;
  padding: 1.5rem;
  border-inline-end: 1px solid var(--ink);
}

.economics-rail > div:last-child {
  border-inline-end: 0;
  background: var(--rail-blue);
  color: var(--surface);
}

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

.economics-rail span {
  font-size: 0.68rem;
  font-weight: 750;
  letter-spacing: 0.06em;
}

.economics-rail strong {
  margin-top: 1.2rem;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 0.95;
}

.economics-rail p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.78rem;
}

.economics-rail > div:last-child p {
  color: #e4edfb;
}

.omitted-costs {
  display: grid;
  grid-template-columns: 0.45fr 1.55fr;
  gap: 2rem;
  margin-top: 2.5rem;
  border-top: 2px solid var(--stop);
  padding-top: 1.25rem;
}

.omitted-costs strong {
  color: var(--stop);
  font-family: var(--display);
  font-size: 2rem;
  line-height: 1;
  text-transform: uppercase;
}