/* The two homepage mergers use the existing editorial tokens and typography. */
.hm [hidden] { display: none !important; }
.hm { scroll-margin-top: 100px; }
.hm-anchor { display: block; position: relative; top: -100px; height: 0; }
.hm h4, .hm h5 { font-size: 1rem; font-weight: 600; line-height: 1.45; margin: 0 0 10px; }
.hm p { margin: 0 0 12px; }
.hm p:last-child { margin-bottom: 0; }
.hm ul { margin: 0; padding-left: 20px; }
.hm li + li { margin-top: 7px; }
.hm button { cursor: pointer; }
.hm a, .hm button, .hm summary { transition: color 160ms ease, background-color 160ms ease, border-color 160ms ease; }
.hm :is(button, a, summary, [tabindex]):focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
.hm [role="tabpanel"] { min-width: 0; }
.hm-meta { font-family: var(--mono); font-size: .75rem; line-height: 1.6; color: #595c59; }
.hm-code { display: block; color: var(--accent-deep); font-family: var(--mono); font-size: .8125rem; margin-bottom: 8px; }
.hm-status { font-size: .9375rem; color: #595c59; }
.hm-scenarios { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); border-block: 1px solid var(--rule); margin-top: 42px; }
.hm-scenarios button { border: 0; border-bottom: 3px solid transparent; background: transparent; padding: 17px 14px; min-width: 0; text-align: left; line-height: 1.4; font-size: .875rem; }
.hm-scenarios button + button { border-left: 1px solid var(--rule); }
.hm-scenarios button:hover { background: var(--accent-tint); }
.hm-scenarios button[aria-selected="true"] { background: var(--ink); border-bottom-color: var(--accent); color: var(--panel); }
.hm-scenarios button[aria-selected="true"] .hm-code { color: #b9c8ff; }
.hm-situation { padding-top: 30px; }
.hm-situation .h3 { margin: 9px 0 14px; }
.hm-lede { max-width: 940px; }
.hm-columns { display: grid; grid-template-columns: 1fr 1fr; gap: 24px 48px; padding: 26px 0; }
.hm-intentions { padding-block: 22px; }
.hm-domain-links { display: flex; flex-wrap: wrap; gap: 8px 20px; align-items: baseline; }
.hm-domain-links a, .hm-mapping-grid a { color: var(--accent-deep); font-size: .875rem; text-decoration: underline; text-underline-offset: 4px; }
.hm-domain-links a:hover, .hm-link:hover { color: var(--ink); }
.hm-tabs { display: flex; flex-wrap: wrap; gap: 0 28px; margin-top: 26px; border-bottom: 1px solid var(--rule); }
.hm-tabs button { border: 0; border-bottom: 2px solid transparent; background: transparent; padding: 14px 0; font-size: .9375rem; text-align: left; line-height: 1.45; }
.hm-tabs button[aria-selected="true"] { color: var(--accent-deep); border-bottom-color: var(--accent); font-weight: 600; }
.hm-tabs button:hover { color: var(--accent-deep); background: var(--accent-tint); }
.hm-action { border-top: 1px solid var(--rule-soft); padding-block: 18px; display: flex; align-items: baseline; gap: 20px; justify-content: space-between; }
.hm-action p { margin: 0; }
.hm-action strong { margin-right: 10px; }
.hm-link { padding: 0; border: 0; background: transparent; color: var(--accent-deep); text-decoration: underline; text-underline-offset: 4px; font-size: .9375rem; }
.hm-action .hm-link { flex-shrink: 0; }
.hm-details { border-block: 1px solid var(--rule); margin-top: 16px; }
.hm-details + .hm-details { border-top: 0; margin-top: 0; }
.hm-details summary { padding: 16px 2px; cursor: pointer; font-size: .9375rem; font-weight: 500; }
.hm-details summary:hover { color: var(--accent-deep); }
.hm-details__body { padding: 2px 0 20px; }
.hm-details__body a { text-decoration: underline; text-underline-offset: 4px; color: var(--accent-deep); overflow-wrap: anywhere; }
.hm-footer { display: grid; grid-template-columns: minmax(0,1fr) auto auto; align-items: start; gap: 24px; border-top: 1px solid var(--rule); padding-top: 22px; }
.hm-footer .hm-details { margin: 0; border: 0; }
.hm-footer summary { padding-top: 10px; }
.hm-footer > .arrow-link { padding-top: 10px; }
.hm-demo { display: flex; flex-direction: column; align-items: center; gap: 6px; }
#why .hm-outputs { border-top: 1px solid var(--rule); padding-block: 20px; }
#why .hm-outputs > h4 { margin-bottom: 4px; }
#why .hm-output-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 24px; margin-top: 16px; }
#why .hm-output-grid > div + div { border-left: 1px solid var(--rule); padding-left: 24px; }
#why .hm-output-grid h5 { font-size: .9375rem; }
#why .hm-output-grid p { font-size: .875rem; }
@media (max-width: 850px) {
  #why .hm-output-grid { grid-template-columns: 1fr; gap: 18px; }
  #why .hm-output-grid > div + div { border-left: 0; border-top: 1px solid var(--rule-soft); padding: 18px 0 0; }
}
.hm-source-details[open] { grid-column: 1 / -1; }
.hm-sources { list-style: none; padding: 0 !important; }
.hm-domain-architecture { display: grid; grid-template-columns: repeat(6, minmax(0,1fr)); gap: 14px; margin-top: 34px; }
.hm-group-label { grid-column: 1 / -1; margin: 10px 0 0 !important; font-family: var(--mono); font-size: .75rem; color: #595c59; text-transform: uppercase; letter-spacing: .05em; }
.hm-domain-card { grid-column: span 2; display: flex; flex-direction: column; text-align: left; padding: 21px 24px; border: 1px solid var(--rule); border-radius: var(--radius); background: var(--panel); font-size: .9375rem; line-height: 1.6; }
.hm-domain-name { font-size: 1.125rem; font-weight: 500; margin-bottom: 8px; }
.hm-domain-card--enabling { grid-column: span 3; background: var(--panel-deep); }
.hm-domain-card:hover { border-color: var(--accent); }
.hm-domain-card[aria-selected="true"] { background: var(--accent-tint); border-color: var(--accent); box-shadow: inset 0 2px var(--accent); }
.hm-cultural { margin-top: 30px; padding-top: 24px; border-top: 1px solid var(--rule); }
.hm-cultural h3 { font-size: 1.125rem; font-weight: 500; margin: 0 0 9px; }
.hm-cultural .hm-details { border: 0; margin-top: 6px; }
.hm-cultural summary { padding-block: 10px; }
.hm-cultural dl { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 32px; margin: 0; }
.hm-cultural dt { font-weight: 600; }
.hm-cultural dd { margin: 6px 0 0; }
.hm-framework-footer { border-top: 1px solid var(--rule); padding-top: 22px; margin-top: 16px; }
.hm-framework-footer > div { display: flex; flex-wrap: wrap; gap: 12px 26px; margin-bottom: 16px; }
.hm-foundations { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 48px; padding-block: 28px; }
.hm-provenance { padding-top: 20px; border-top: 1px solid var(--rule); }
.hm-trace-tabs { margin-top: 0; gap: 0 22px; }
.hm-trace-tabs + [role="tabpanel"], .hm-trace-tabs ~ [role="tabpanel"] { padding-top: 20px; }
.hm-mapping { padding-top: 26px; }
.hm h4.hm-mapping-title { font-size: 1.125rem; font-weight: 500; }
.hm-mapping-grid { display: grid; grid-template-columns: minmax(0,1fr) 36px minmax(0,1fr); gap: 20px; margin-top: 24px; padding: 24px; background: var(--panel); border: 1px solid var(--rule); border-radius: var(--radius); }
.hm-mapping-grid h5 { font-size: 1.125rem; margin-top: 9px; }
.hm-mapping-arrow { padding-top: 42px; font-size: 1.5rem; color: var(--accent); text-align: center; }
.hm-mapping-grid .hm-meta { margin-top: 12px; }
.hm-mapping-grid .hm-meta:first-child { margin-top: 0; }
.hm-correspondence { padding-bottom: 6px; }
@media (max-width: 900px) {
  .hm-scenarios { grid-template-columns: repeat(4,minmax(0,1fr)); }
  .hm-scenarios button { border: 1px solid var(--rule); border-bottom-width: 3px; }
  .hm-tabs { gap: 0 18px; }
  .hm-action { flex-direction: column; gap: 10px; }
}
@media (max-width: 600px) {
  .hm-scenarios { grid-template-columns: repeat(2,minmax(0,1fr)); margin-top: 28px; }
  .hm-scenarios button:last-child { grid-column: 1 / -1; }
  .hm-columns, .hm-foundations, .hm-cultural dl { grid-template-columns: 1fr; gap: 22px; }
  .hm-domain-architecture { grid-template-columns: 1fr; }
  .hm-domain-card, .hm-domain-card--enabling { grid-column: auto; }
  .hm-tabs { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
  .hm-tabs button { min-height: 52px; }
  .hm-tabs button:last-child:nth-child(odd) { grid-column: 1 / -1; }
  .hm-domain-links { gap: 10px 18px; }
  .hm-domain-links > .hm-meta { flex-basis: 100%; }
  .hm-footer { grid-template-columns: 1fr; gap: 12px; }
  .hm-demo { align-items: flex-start; margin-top: 8px; }
  .hm-mapping-grid { grid-template-columns: 1fr; padding: 20px; gap: 14px; }
  .hm-mapping-arrow { padding: 0; transform: rotate(90deg); justify-self: start; }
  .hm-situation .h3 { font-size: 1.6rem; }
}
@media (prefers-reduced-motion: reduce) {
  .hm *, .hm *::before, .hm *::after { transition: none !important; scroll-behavior: auto !important; }
}

/* Section B restoration: architecture and method share one bounded surface. */
#domains.hm { padding-block: var(--space-block); }
#domains .hm-domain-architecture { margin-top: 26px; gap: 10px; }
#domains .hm-domain-card { border-radius: 2px; padding: 17px 20px; box-shadow: none; }
#domains .hm-domain-card[aria-selected="true"] { border-color: var(--accent); }
#domains .hm-domain-name { margin-bottom: 5px; }
#domains .hm-framework-panel { margin-top: 22px; border: 1px solid var(--rule); border-radius: 2px; padding: 22px; background: var(--panel); }
#domains .hm-selected-domain { margin: 0 0 14px; font: 500 .875rem/1.5 var(--mono); text-transform: uppercase; color: var(--accent-deep); }
#domains .hm-framework-panel .hm-tabs { margin-top: 0; gap: 0; }
#domains .hm-framework-panel .hm-tabs button { border: 1px solid var(--rule); border-bottom: 2px solid transparent; padding: 10px 22px; background: var(--paper); margin-right: -1px; }
#domains .hm-framework-panel .hm-tabs button[aria-selected="true"] { background: var(--accent-tint); border-color: var(--accent); position: relative; }
#domains :is(button,a,summary,[tabindex]):focus-visible { outline: 2px dashed var(--ink); outline-offset: 4px; }
#domains .hm-evidence-layout { display: grid; grid-template-columns: 1.05fr 1fr; gap: 26px; padding-top: 22px; }
#domains .hm-panel-subtitle { font-size: 1.25rem; font-weight: 500; margin-bottom: 20px; }
#domains .hm-foundations { gap: 24px; padding: 0; }
#domains .hm-foundation-note { font-size: .875rem; color: #595c59; border-top: 1px solid var(--rule); margin-top: 22px; padding-top: 14px; }
#domains .hm-published-source { border: 1px solid var(--rule); border-radius: 2px; padding: 18px; }
#domains .hm-published-source > h4 { margin: 6px 0; }
#domains .hm-published-source > div { margin-block: 16px; }
#domains .hm-published-source .hm-sources { font-size: .875rem; }
#domains .hm-published-source a { color: var(--accent-deep); text-decoration: underline; text-underline-offset: 3px; }
#domains .hm-mapping-rationale { margin-top: 14px; border-bottom: 0; }
#domains .hm-mapping-rationale summary { padding-block: 12px; }
#domains .hm-mapping-rationale .hm-details__body { padding-bottom: 0; font-size: .9375rem; }
#domains .hm-mapping-rationale .hm-details__body > div + div { margin-top: 16px; }
#domains .hm-evidence-trail { margin-top: 22px; }
#domains .hm-evidence-trail .hm-trace-tabs { display: grid; grid-template-columns: repeat(7,minmax(0,1fr)); gap: 16px; border: 1px solid var(--rule); padding: 0; }
#domains .hm-evidence-trail .hm-trace-tabs button { position: relative; border: 1px solid transparent; margin: -1px; padding: 10px 4px; text-align: center; font-size: .875rem; background: transparent; }
#domains .hm-evidence-trail .hm-trace-tabs button[aria-selected="true"] { background: var(--accent-tint); border-color: var(--accent); }
#domains .hm-trace-tabs button:not(:last-child)::after { content: '→'; position: absolute; right: -15px; color: var(--accent-deep); pointer-events: none; }
#domains .hm-evidence-trail > [role="tabpanel"] { padding: 17px 20px; margin-top: 8px; border: 1px solid var(--rule); background: var(--paper); }
#domains .hm-evidence-trail > [role="tabpanel"] h4 { font: 500 .8125rem/1.5 var(--mono); color: var(--accent-deep); text-transform: uppercase; margin-bottom: 8px; }
#domains .hm-cultural { border: 1px solid var(--rule); padding: 16px 18px; margin-top: 18px; }
#domains .hm-cultural h3 { font-size: 1rem; }
#domains .hm-cultural p { font-size: .9375rem; }
#domains .hm-cultural summary { padding-bottom: 0; }
#domains .hm-cultural .hm-details[open] summary { padding-bottom: 14px; }
#domains .hm-cultural .hm-details__body { padding-bottom: 0; }
#domains .hm-framework-footer { display: flex; flex-wrap: wrap; gap: 12px 24px; justify-content: space-between; align-items: center; padding-top: 16px; }
#domains .hm-framework-footer > div { margin: 0; gap: 12px 20px; }
#domains .hm-framework-footer a { font-size: .875rem; }
#domains .hm-framework-footer p { margin: 0; }
#domains .hm-mapping-grid { background: transparent; border-radius: 2px; margin-top: 18px; padding: 18px; }
#domains .hm-mapping { padding-top: 22px; }
@media (max-width: 850px) {
  #domains .hm-evidence-layout { grid-template-columns: 1fr; }
  #domains .hm-evidence-trail .hm-trace-tabs { grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; }
  #domains .hm-trace-tabs button:not(:last-child)::after { right: -11px; }
  #domains .hm-trace-tabs button:nth-child(4)::after { content: none; }
}
@media (max-width: 600px) {
  #domains .hm-framework-panel { padding: 16px; }
  #domains .hm-domain-card { padding: 15px 16px; }
  #domains .hm-foundations { grid-template-columns: 1fr; gap: 18px; }
  #domains .hm-framework-panel .hm-tabs button { padding: 10px 9px; margin: 0; }
  #domains .hm-evidence-trail .hm-trace-tabs { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 14px; }
  #domains .hm-trace-tabs button:nth-child(2n)::after { content: none; }
  #domains .hm-trace-tabs button:last-child { grid-column: 1 / -1; }
  #domains .hm-published-source { padding: 14px; }
  #domains .hm-cultural { padding: 14px; }
  #domains .hm-mapping-grid { padding: 14px; }
}