/* Hallmark · pre-emit critique: P5 H5 E4 S5 R5 V5 · editorial dossier · macrostructure: Map / Diagram + Long Document · theme: Sokosumi DESIGN.md · enrichment: Tier-A CSS system map · contrast: pass (46–50) · nav/footer: existing locked chrome · slop: pass (51–60) · mobile: pass (36, 59, 61–69) */

body:has(.sp-page) {
  overflow-x: clip;
}

.crumbs {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.crumbs .current {
  display: inline;
}

.sp-page {
  --sp-paper: var(--background);
  --sp-surface: var(--card);
  --sp-soft: var(--muted);
  --sp-ink: var(--foreground);
  --sp-quiet: var(--muted-foreground);
  --sp-rule: var(--border);
  --sp-accent: var(--primary);
  --sp-accent-dark: var(--primary-on-dark);
  --sp-band: var(--ink);
  --sp-band-ink: var(--card);
  --sp-font-display: var(--display);
  --sp-font-body: var(--sans);
  /* One type ladder for the whole dossier. Four body steps and four heading
     steps — nothing else. A surface that wants "slightly smaller" picks the
     step below, it does not invent 12.5px. */
  --sp-xs: 12px;      /* uppercase eyebrows, numbers, table heads */
  --sp-sm: 14px;      /* captions, meta, secondary copy */
  --sp-md: 16px;      /* body, card headings, data tables */
  --sp-lg: 18px;      /* sub-heads, lead-ins */
  --sp-lead: clamp(16px, 1.6vw, 19px);
  --sp-h3: clamp(20px, 2.2vw, 26px);
  --sp-h2: clamp(28px, 3.5vw, 44px);
  --sp-h1-chapter: clamp(36px, 4.4vw, 60px);
  --sp-h1: clamp(38px, 6vw, 76px);
  --space-3xs: 4px;
  --space-2xs: 8px;
  --space-xs: 12px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 80px;
  --space-4xl: 96px;
  --space-5xl: 120px;
  padding-bottom: 0;
}

.sp-page :where(a, summary):focus-visible {
  outline: 2px solid var(--sp-accent);
  outline-offset: 4px;
}

.sp-page :where(a, summary):active {
  opacity: 0.72;
}

.sp-page :where(a, summary)[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.48;
  pointer-events: none;
}

.sp-page .eyebrow {
  display: block;
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-weight: 500;
  letter-spacing: 0.055em;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.sp-hero {
  display: grid;
  gap: clamp(var(--space-lg), 7vw, var(--space-4xl));
  padding: clamp(var(--space-lg), 6vw, var(--space-3xl)) 0 clamp(var(--space-2xl), 9vw, var(--space-5xl));
}

.sp-hero-copy {
  align-self: center;
  min-width: 0;
}

.sp-hero-logo {
  align-items: center;
  background: var(--sp-surface);
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-lg);
  display: inline-grid;
  gap: 4px;
  height: 56px;
  justify-content: center;
  margin-bottom: 24px;
  padding: 8px 16px;
  width: 156px;
}

.sp-hero-logo img,
.sp-hero-logo b {
  align-items: center;
  display: flex;
  font-size: var(--sp-lg);
  font-weight: 500;
  height: 28px;
  justify-content: center;
  object-fit: contain;
  width: 124px;
}

.sp-hero-logo.sp-logo-count-2,
.sp-hero-logo.sp-logo-count-3 {
  height: auto;
  min-height: 68px;
}

.sp-hero-logo.sp-logo-count-2 img,
.sp-hero-logo.sp-logo-count-3 img {
  height: 14px;
  width: 112px;
}

.sp-hero h1 {
  font-family: var(--sp-font-display);
  font-size: var(--sp-h1);
  font-weight: 300;
  letter-spacing: -0.045em;
  line-height: 0.99;
  max-width: 15ch;
  min-width: 0;
  overflow-wrap: anywhere;
  text-wrap: balance;
}

.sp-hero-copy > p {
  color: var(--sp-quiet);
  font-size: var(--sp-lead);
  line-height: 1.6;
  margin-top: var(--space-md);
  max-width: 58ch;
  text-wrap: pretty;
}

.sp-hero-meta {
  border-top: 1px solid var(--sp-rule);
  color: var(--sp-quiet);
  display: flex;
  flex-wrap: wrap;
  font-size: var(--sp-xs);
  gap: var(--space-2xs) var(--space-md);
  margin-top: var(--space-lg);
  padding-top: var(--space-sm);
}

.sp-system-map {
  align-self: stretch;
  background: var(--sp-surface);
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-lg);
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: clamp(20px, 3vw, 32px);
}

.sp-system-map figcaption {
  border-bottom: 1px solid var(--sp-rule);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  padding-bottom: var(--space-md);
}

.sp-system-map figcaption span,
.sp-map-foundation span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.sp-system-map figcaption strong {
  font-size: var(--sp-lg);
  font-weight: 500;
  line-height: 1.35;
}

.sp-map-flow {
  display: grid;
  flex: 1;
}

.sp-map-node {
  display: grid;
  gap: 4px;
  grid-template-columns: 30px minmax(0, 1fr);
  padding: var(--space-sm) 0;
  position: relative;
}

.sp-map-node + .sp-map-node {
  border-top: 1px solid var(--sp-rule);
}

.sp-map-node > span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  grid-row: 1 / 4;
  padding-top: var(--space-3xs);
}

.sp-map-node strong {
  font-size: var(--sp-md);
  font-weight: 600;
}

.sp-map-node small {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.4;
}

.sp-map-node em {
  font-size: var(--sp-xs);
  font-style: normal;
  line-height: 1.4;
}

.sp-map-foundation {
  background: var(--sp-band);
  border-radius: var(--r-md);
  color: var(--sp-band-ink);
  display: grid;
  gap: 4px;
  padding: var(--space-sm) var(--space-md);
}

.sp-map-foundation span,
.sp-map-foundation small {
  color: var(--sp-band-ink);
  opacity: 0.65;
}

.sp-map-foundation strong {
  font-size: var(--sp-md);
  font-weight: 500;
}

.sp-hero-proof {
  align-self: end;
  border-bottom: 1px solid var(--sp-rule);
  border-top: 1px solid var(--sp-ink);
  padding: var(--space-md) 0 0;
}

.sp-proof-label {
  color: var(--sp-quiet);
  display: block;
  font-size: var(--sp-xs);
  font-weight: 500;
  letter-spacing: 0.055em;
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
}

.sp-hero-proof dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sp-hero-proof dl div {
  border-top: 1px solid var(--sp-rule);
  padding: var(--space-xs) 0;
}

.sp-hero-proof dl div:nth-child(even) {
  padding-left: var(--space-md);
}

.sp-hero-proof dt {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  margin-bottom: 4px;
}

.sp-hero-proof dd {
  font-size: var(--sp-sm);
  font-weight: 500;
}

.sp-hero-proof ol {
  border-top: 1px solid var(--sp-rule);
  counter-reset: proof;
  list-style: none;
  padding: 12px 0;
}

.sp-hero-proof li {
  counter-increment: proof;
}

.sp-hero-proof li a {
  align-items: baseline;
  display: grid;
  font-size: var(--sp-sm);
  gap: var(--space-xs);
  grid-template-columns: 18px minmax(0, 1fr);
  line-height: 1.45;
  padding: var(--space-2xs) 0;
}

.sp-hero-proof li a::before {
  color: var(--sp-quiet);
  content: counter(proof, decimal-leading-zero);
  font-size: var(--sp-xs);
}

.sp-hero-proof li a:hover {
  color: var(--sp-accent);
}


.sp-block {
  scroll-margin-top: 96px;
}

.sp-block > .blk {
  padding: clamp(var(--space-lg), 5vw, var(--space-3xl)) 0;
}

.sp-page .sp-block [data-reveal] {
  opacity: 1;
  transform: none;
  transition: none;
}

.sp-page .blk-head {
  margin-bottom: clamp(var(--space-lg), 4vw, var(--space-xl));
  max-width: 760px;
}

.sp-page .blk-head h2,
.sp-page .prose h2,
.sp-section-intro h2,
.sp-evidence h2,
.sp-bridge h2 {
  font-family: var(--sp-font-display);
  font-size: var(--sp-h2);
  font-weight: 300;
  letter-spacing: -0.035em;
  line-height: 1.08;
  text-wrap: balance;
}

.sp-page .prose {
  font-size: var(--sp-md);
  line-height: 1.78;
  max-width: 68ch;
}

.sp-page .prose h2 {
  margin-top: 0 !important;
  max-width: 18ch;
}

.sp-page .prose p,
.sp-page .prose li {
  color: var(--sp-ink);
  opacity: 0.78;
}

.sp-page .prose a {
  color: var(--sp-ink);
  text-decoration-color: var(--sp-accent);
  text-decoration-thickness: 1px;
}

.sp-page .prose a:hover {
  color: var(--sp-accent);
}

.sp-page .blk-stats {
  border-top: 1px solid var(--sp-ink);
  gap: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.sp-page .blk-stats .stat {
  background: transparent;
  border: 0;
  border-radius: 0;
  padding: var(--space-md) 0;
}

.sp-page .blk-stats .stat:nth-child(even) {
  padding-left: var(--space-md);
}

.sp-page .blk-stats .value {
  font-size: var(--sp-h2);
  font-weight: 300;
  letter-spacing: -0.04em;
}

.sp-page .blk-stats .label {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.45;
  margin-top: var(--space-2xs);
}

.sp-page .blk-grid {
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
}

.sp-page .blk-grid .card {
  background: transparent;
  border: 0;
  border-radius: 0;
  min-height: 0;
  padding: var(--space-md) 0;
}

.sp-page .blk-grid .card h3 {
  font-size: var(--sp-md);
  font-weight: 500;
  line-height: 1.35;
}


.sp-page .blk-grid .card p {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.65;
  margin-top: var(--space-2xs);
}

.sp-page .blk-steps {
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
}

.sp-page .blk-steps .step {
  display: grid;
  gap: var(--space-2xs) var(--space-sm);
  grid-template-columns: 34px minmax(0, 1fr);
  padding: var(--space-md) 0;
}

.sp-page .blk-steps .num {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  grid-row: 1 / 3;
  padding-top: 4px;
}

.sp-page .blk-steps h3 {
  font-size: var(--sp-md);
  font-weight: 500;
}

.sp-page .blk-steps p {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.65;
}

.sp-page .blk-checklist ul {
  max-width: none;
}

.sp-page .blk-checklist li {
  padding: var(--space-sm) 0;
}

.sp-page .blk-faq {
  border-top: 1px solid var(--sp-ink);
  max-width: none;
}

.sp-page .faq-item summary {
  min-height: 56px;
  padding-left: 0;
}

.sp-page .faq-item .faq-a {
  padding-left: 0;
}

.sp-mobile-index {
  border-bottom: 1px solid var(--sp-rule);
  margin: 0;
}

.sp-mobile-index > summary {
  align-items: center;
  cursor: pointer;
  display: flex;
  font-size: var(--sp-sm);
  font-weight: 500;
  justify-content: space-between;
  min-height: 56px;
  padding: 0;
}

.sp-mobile-index > summary::-webkit-details-marker {
  display: none;
}

.sp-mobile-index[open] > summary span {
  transform: rotate(45deg);
}

.sp-mobile-index > div {
  border-top: 1px solid var(--sp-rule);
  padding: var(--space-md) 0 var(--space-lg);
}

.sp-reading-layout {
  display: grid;
}

.sp-reading-rail {
  display: none;
}

.sp-contents,
.sp-dossier-index {
  display: flex;
  flex-direction: column;
}

.sp-contents > span,
.sp-dossier-index > span,
.sp-index-group > span {
  color: var(--sp-quiet);
  display: block;
  font-size: var(--sp-xs);
  font-weight: 500;
  letter-spacing: 0.055em;
  margin-bottom: var(--space-2xs);
  text-transform: uppercase;
}

.sp-contents a,
.sp-dossier-index > a,
.sp-index-group a {
  border-left: 1px solid var(--sp-rule);
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.45;
  overflow: hidden;
  padding: var(--space-2xs) 0 var(--space-2xs) var(--space-xs);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sp-contents a:hover,
.sp-dossier-index a:hover,
.sp-dossier-index a[aria-current="page"] {
  border-left-color: var(--sp-accent);
  color: var(--sp-ink);
}

.sp-dossier-index {
  margin-top: var(--space-lg);
}

.sp-index-group {
  display: flex;
  flex-direction: column;
  margin-top: var(--space-sm);
}

.sp-index-group > span {
  margin-left: var(--space-sm);
}

.sp-article > .sp-block > .blk {
  padding: clamp(var(--space-lg), 5vw, var(--space-2xl)) 0;
}

.sp-article .blk-head,
.sp-article .prose,
.sp-article .blk-checklist,
.sp-article .blk-faq {
  max-width: 760px;
}

.sp-directory {
  padding: clamp(var(--space-2xl), 9vw, 112px) 0;
}

.sp-section-intro {
  display: grid;
  gap: var(--space-xs);
  margin-bottom: clamp(var(--space-xl), 7vw, var(--space-3xl));
}

.sp-section-intro h2 {
  max-width: 16ch;
}

.sp-section-intro > p {
  color: var(--sp-quiet);
  font-size: var(--sp-md);
  line-height: 1.65;
  max-width: 54ch;
}

.sp-groups {
  border-top: 1px solid var(--sp-ink);
}

.sp-group + .sp-group {
  border-top: 1px solid var(--sp-rule);
}

.sp-group {
  display: grid;
  gap: var(--space-lg);
  padding: clamp(36px, 5vw, 64px) 0;
}

.sp-group-head {
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr);
}

.sp-group-index {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  padding-top: var(--space-3xs);
}

.sp-group-head h3 {
  font-size: var(--sp-h3);
  font-weight: 400;
  letter-spacing: -0.025em;
}

.sp-group-head p {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.6;
  margin-top: var(--space-2xs);
  max-width: 44ch;
}

.sp-chapter + .sp-chapter {
  border-top: 1px solid var(--sp-rule);
}

.sp-chapter {
  align-items: start;
  color: var(--sp-ink);
  display: grid;
  gap: 12px;
  grid-template-columns: minmax(0, 1fr) 18px;
  padding: var(--space-md) 0;
}

.sp-chapter-num {
  color: var(--sp-quiet);
  display: none;
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  grid-column: 1;
  grid-row: 1;
  padding-top: var(--space-xs);
}

.sp-chapter-logo {
  align-items: center;
  background: var(--sp-surface);
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  display: grid;
  gap: 4px;
  grid-column: 1;
  grid-row: 1;
  height: 40px;
  justify-items: center;
  padding: 8px 12px;
  width: 132px;
}

.sp-chapter-logo img,
.sp-chapter-logo b {
  align-items: center;
  border: 0;
  border-radius: 0;
  display: flex;
  font-size: var(--sp-sm);
  font-weight: 500;
  height: 24px;
  justify-content: center;
  object-fit: contain;
  padding: 0;
  width: 110px;
}

.sp-chapter-logo.sp-logo-count-2,
.sp-chapter-logo.sp-logo-count-3 {
  height: auto;
  min-height: 52px;
}

.sp-chapter-logo.sp-logo-count-2 img,
.sp-chapter-logo.sp-logo-count-3 img {
  height: 12px;
  width: 96px;
}

.sp-chapter-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  grid-column: 1 / 3;
  grid-row: 2;
  min-width: 0;
}

.sp-chapter-kicker {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  letter-spacing: 0.035em;
  line-height: 1.35;
  text-transform: uppercase;
}

.sp-chapter-title {
  font-size: var(--sp-lead);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.35;
}

.sp-chapter-desc {
  color: var(--sp-quiet);
  display: -webkit-box;
  font-size: var(--sp-sm);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  line-height: 1.55;
  max-width: 66ch;
  overflow: hidden;
}

.sp-chapter-go {
  color: var(--sp-quiet);
  grid-column: 2;
  grid-row: 1;
  padding-top: var(--space-2xs);
  transition: color 160ms var(--ease);
}

.sp-chapter:hover .sp-chapter-title,
.sp-chapter:focus-visible .sp-chapter-title {
  color: var(--sp-accent);
}

.sp-chapter:hover .sp-chapter-go {
  color: var(--sp-accent);
}

.sp-evidence {
  border-top: 1px solid var(--sp-ink);
  display: grid;
  gap: clamp(var(--space-lg), 5vw, var(--space-2xl));
  padding: clamp(var(--space-2xl), 8vw, var(--space-4xl)) 0;
}

.sp-evidence header p {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.6;
  margin-top: var(--space-sm);
  max-width: 54ch;
}

.sp-evidence ol {
  list-style: none;
}

.sp-evidence li {
  align-items: center;
  border-bottom: 1px solid var(--sp-rule);
  display: grid;
  gap: 12px;
  grid-template-columns: 25px minmax(0, 1fr) 18px;
  padding: var(--space-sm) 0;
}

.sp-evidence li > span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
}

.sp-evidence li a {
  display: flex;
  flex-direction: column;
  gap: var(--space-3xs);
  min-width: 0;
}

.sp-evidence li strong {
  font-size: var(--sp-sm);
  font-weight: 500;
}

.sp-evidence li small {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sp-evidence li a:hover strong {
  color: var(--sp-accent);
}

.sp-prevnext {
  border-top: 1px solid var(--sp-ink);
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
  padding: 0;
}

.sp-pn {
  border-bottom: 1px solid var(--sp-rule);
  display: flex;
  flex-direction: column;
  gap: var(--space-2xs);
  padding: 24px 0;
}

.sp-pn > span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.sp-pn strong {
  font-size: var(--sp-lg);
  font-weight: 400;
  line-height: 1.4;
  max-width: 32ch;
}

a.sp-pn:hover strong {
  color: var(--sp-accent);
}

.sp-bridge {
  background: var(--sp-band);
  color: var(--sp-band-ink);
  display: grid;
  gap: clamp(36px, 7vw, 92px);
  margin-left: calc(50% - 50vw);
  margin-right: calc(50% - 50vw);
  margin-top: clamp(64px, 9vw, 120px);
  padding: clamp(var(--space-2xl), 8vw, var(--space-4xl)) max(clamp(var(--space-md), 4vw, var(--space-2xl)), calc((100vw - 1240px) / 2 + clamp(var(--space-md), 4vw, var(--space-2xl))));
}

.sp-bridge .eyebrow {
  color: var(--sp-accent-dark);
}

.sp-bridge h2 {
  color: var(--sp-band-ink);
  max-width: 16ch;
}

.sp-bridge p {
  color: var(--sp-band-ink);
  font-size: var(--sp-md);
  line-height: 1.65;
  margin-top: var(--space-sm);
  max-width: 58ch;
  opacity: 0.68;
}

.sp-bridge-actions {
  align-items: flex-start;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.sp-bridge .btn-primary {
  background: var(--sp-band-ink);
  color: var(--sp-band);
  margin-bottom: var(--space-2xs);
}

.sp-bridge-actions > a:not(.btn) {
  align-items: center;
  color: var(--sp-band-ink);
  display: inline-flex;
  font-size: var(--sp-sm);
  gap: var(--space-2xs);
  opacity: 0.68;
}

.sp-bridge-actions > a:not(.btn):hover {
  color: var(--sp-accent-dark);
  opacity: 1;
}

.sp-bridge :focus-visible {
  outline-color: var(--sp-accent-dark);
}

@media (min-width: 40rem) {
  .sp-chapter {
    grid-template-columns: 26px 132px minmax(0, 1fr) 18px;
  }

  .sp-chapter-num {
    display: block;
  }

  .sp-chapter-logo {
    grid-column: 2;
  }

  .sp-chapter-body {
    grid-column: 3;
    grid-row: 1;
  }

  .sp-chapter-go {
    grid-column: 4;
  }

  .sp-map-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sp-map-node:nth-child(even) {
    border-left: 1px solid var(--sp-rule);
    padding-left: var(--space-sm);
  }

  .sp-map-node:nth-child(2) {
    border-top: 0;
  }

  .sp-page .blk-stats {
    grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr));
  }

  .sp-page .blk-stats .stat {
    border-bottom: 0;
    padding: 24px 20px 24px 0;
  }

  .sp-page .blk-stats .stat + .stat {
    border-left: 1px solid var(--sp-rule);
    padding-left: var(--space-md);
  }

  .sp-page .blk-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sp-page .blk-grid .card:nth-child(even) {
    border-left: 1px solid var(--sp-rule);
    padding-left: 24px;
  }



  .sp-page .blk-grid .card:nth-child(odd) {
    padding-right: 24px;
  }

  .sp-page .blk-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .sp-page .blk-steps .step:nth-child(even) {
    border-left: 1px solid var(--sp-rule);
    padding-left: 24px;
  }

  .sp-page .blk-steps .step:nth-child(odd) {
    padding-right: 24px;
  }

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

  .sp-pn-next {
    align-items: flex-end;
    border-left: 1px solid var(--sp-rule);
    text-align: right;
  }

  .sp-pn-prev {
    padding-right: var(--space-lg);
  }

  .sp-pn-next {
    padding-left: var(--space-lg);
  }
}

@media (min-width: 60rem) {
  .sp-hero {
    grid-template-columns: minmax(0, 7fr) minmax(360px, 5fr);
  }

  .sp-hero-chapter h1 {
    font-size: var(--sp-h1-chapter);
  }

  .sp-reading-layout {
    align-items: start;
    gap: clamp(var(--space-xl), 6vw, var(--space-3xl));
    grid-template-columns: 230px minmax(0, 1fr);
  }

  .sp-mobile-index {
    display: none;
  }

  .sp-reading-rail {
    display: block;
    max-height: calc(100vh - 104px);
    overflow-y: auto;
    padding: var(--space-2xl) var(--space-xs) var(--space-lg) 0;
    position: sticky;
    scrollbar-width: thin;
    top: var(--space-3xl);
  }

  .sp-article {
    min-width: 0;
  }

  .sp-section-intro {
    grid-template-columns: minmax(0, 1fr);
  }

  .sp-group {
    gap: clamp(44px, 6vw, 80px);
    grid-template-columns: minmax(240px, 0.75fr) minmax(0, 1.25fr);
  }

  .sp-evidence {
    grid-template-columns: minmax(260px, 0.75fr) minmax(0, 1.25fr);
  }

  .sp-bridge {
    align-items: end;
    grid-template-columns: minmax(0, 1.4fr) minmax(220px, 0.6fr);
  }

  .sp-bridge-actions {
    justify-self: end;
    min-width: 220px;
  }
}

@media (min-width: 90rem) {
  .sp-reading-layout {
    grid-template-columns: 250px minmax(0, 1fr);
  }

  .sp-hub-body .sp-block-richText .prose {
    max-width: 74ch;
  }
}

@media (max-width: 24rem) {
  .sp-hero h1 {
    font-size: 36px;
  }
}

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

/* ---------------------------------------------------------------------------
   Figures, matrices, imagery (template-owned visuals for the dossier) */

.sp-hero-hub {
  padding-bottom: clamp(var(--space-xl), 6vw, var(--space-3xl));
}

.sp-hero-side {
  display: grid;
  gap: var(--space-md);
  min-width: 0;
}

.sp-hero-side .sp-system-map {
  padding: clamp(16px, 2vw, 22px);
}

.sp-hero-side .sp-system-map figcaption {
  padding-bottom: var(--space-sm);
}

.sp-hero-side .sp-map-node {
  padding: var(--space-xs) 0;
}

.sp-hero-side .sp-map-node small {
  display: none;
}

.sp-hero-side .sp-map-foundation {
  padding: var(--space-xs) var(--space-sm);
}

.sp-hero-side .sp-hero-proof {
  align-self: start;
}

.sp-hero-side .sp-hero-proof dl {
  margin-bottom: 0;
}

.sp-system-map .sp-map-node {
  transition: opacity 200ms var(--ease);
}

.sp-system-map.is-focused .sp-map-node.is-dim {
  opacity: 0.38;
}

.sp-system-map.is-focused .sp-map-node.is-lit > span {
  background: var(--sp-accent);
  border-radius: 999px;
  color: #fff;
  display: inline-flex;
  font-weight: 600;
  height: 18px;
  justify-content: center;
  line-height: 18px;
  padding: 0;
  width: 26px;
}

.sp-system-map.is-focused .sp-map-node.is-lit strong {
  color: var(--sp-accent);
}

.sp-stats-source {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  margin: calc(-1 * var(--space-lg)) 0 var(--space-xl);
}

.sp-stats-source a {
  color: var(--sp-ink);
  text-decoration: underline;
  text-decoration-color: var(--sp-rule);
  text-underline-offset: 3px;
}

.sp-stats-source a:hover {
  text-decoration-color: var(--sp-ink);
}

.sp-stats-source svg {
  vertical-align: -1px;
}

.sp-page .blk-grid .card:last-child:nth-child(odd):not(:first-child),
.sp-page .blk-steps .step:last-child:nth-child(odd):not(:first-child) {
  grid-column: 1 / -1;
  padding-right: 0;
}

.sp-fig {
  display: grid;
  gap: var(--space-md);
  margin: 0 0 clamp(var(--space-2xl), 6vw, var(--space-4xl));
  padding-top: var(--space-md);
}

.sp-fig figcaption {
  align-items: start;
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: 32px minmax(0, 1fr);
}

.sp-fig figcaption > div {
  display: grid;
  gap: var(--space-3xs);
}

.sp-fig figcaption .sp-glyph {
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  color: var(--sp-accent);
  height: 32px;
  padding: 6px;
  width: 32px;
}

.sp-fig figcaption span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.sp-fig figcaption strong {
  font-size: var(--sp-h3);
  font-weight: 500;
  letter-spacing: -0.015em;
  line-height: 1.3;
  max-width: 40ch;
  text-wrap: balance;
}

.sp-fig-note {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.5;
  max-width: 64ch;
}

/* flow */
.sp-flow {
  counter-reset: none;
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.sp-flow li {
  border-top: 1px solid var(--sp-rule);
  display: grid;
  gap: 4px;
  grid-template-columns: 30px minmax(0, 1fr);
  padding: var(--space-sm) 0;
  position: relative;
}

.sp-flow li:first-child {
  border-top: 0;
}

.sp-flow-num {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  grid-row: 1 / 4;
  padding-top: 3px;
}

.sp-flow strong {
  font-size: var(--sp-md);
  font-weight: 600;
  line-height: 1.3;
}

.sp-flow em {
  color: var(--sp-accent);
  font-size: var(--sp-xs);
  font-style: normal;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.sp-flow small {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.5;
}

.sp-flow-owners {
  border-top: 1px solid var(--sp-rule);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md) var(--space-xl);
  padding-top: var(--space-sm);
}

.sp-flow-owners > span {
  display: grid;
  gap: 6px;
}

.sp-flow-owners img {
  height: 14px;
  object-fit: contain;
  object-position: left;
  width: 96px;
}

.sp-flow-owners small {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
}

/* stack */
.sp-stack {
  display: grid;
  gap: 0;
}

.sp-stack-layer {
  align-items: start;
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  display: grid;
  gap: var(--space-xs);
  grid-template-columns: 30px minmax(0, 1fr);
  margin-bottom: var(--space-2xs);
  padding: var(--space-sm) var(--space-md);
}

.sp-stack-layer > span {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}

.sp-stack-layer strong {
  display: block;
  font-size: var(--sp-md);
  font-weight: 600;
}

.sp-stack-layer small {
  color: var(--sp-quiet);
  display: block;
  font-size: var(--sp-sm);
  line-height: 1.5;
  margin-top: 2px;
}

.sp-stack-layer em {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-style: normal;
  grid-column: 2;
}

.sp-stack-foundation {
  background: var(--sp-band);
  border-radius: var(--r-md);
  color: var(--sp-band-ink);
  display: grid;
  gap: 4px;
  padding: var(--space-sm) var(--space-md);
}

.sp-stack-foundation span,
.sp-stack-foundation small {
  color: var(--sp-band-ink);
  opacity: 0.65;
}

.sp-stack-foundation span {
  font-size: var(--sp-xs);
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.sp-stack-foundation strong {
  font-size: var(--sp-md);
  font-weight: 500;
}

.sp-stack-foundation small {
  font-size: var(--sp-sm);
}

/* matrix + ledger */
.sp-matrix-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.sp-matrix {
  border-collapse: collapse;
  font-size: var(--sp-md);
  line-height: 1.45;
  min-width: 560px;
  width: 100%;
}

.sp-matrix th,
.sp-matrix td {
  border-bottom: 1px solid var(--sp-rule);
  padding: var(--space-xs) var(--space-sm) var(--space-xs) 0;
  text-align: left;
  vertical-align: top;
}

.sp-matrix thead th {
  border-bottom: 1px solid var(--sp-ink);
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-weight: 500;
  letter-spacing: 0.055em;
  padding-top: 0;
  text-transform: uppercase;
}

.sp-matrix tbody th {
  font-weight: 600;
  min-width: 120px;
}

.sp-matrix tbody th small {
  color: var(--sp-quiet);
  display: block;
  font-size: var(--sp-xs);
  font-weight: 400;
  margin-top: 2px;
}

.sp-matrix tbody th a {
  color: inherit;
  text-decoration: none;
}

.sp-matrix tbody th a:hover {
  color: var(--sp-accent);
}

.sp-matrix tbody th a svg {
  vertical-align: -1px;
}

.sp-matrix td {
  color: var(--sp-ink);
}

.sp-matrix td.is-quiet {
  color: var(--sp-quiet);
}

.sp-matrix-empty {
  color: var(--sp-rule);
}

.sp-matrix-logos tbody th img {
  display: block;
  height: 30px;
  object-fit: contain;
  object-position: left;
  width: 100%;
  max-width: 280px;
  min-width: 190px;
}

.sp-matrix-logos tbody th {
  min-width: 210px;
  padding-right: var(--space-lg);
}

.sp-matrix tbody tr:last-child th,
.sp-matrix tbody tr:last-child td {
  border-bottom: 0;
}

/* chips (product map) */
.sp-chips {
  display: grid;
  gap: var(--space-2xs);
}

.sp-chips-row {
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  display: grid;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
}

.sp-chips-row.is-dark {
  background: var(--sp-band);
  border-color: var(--sp-band);
  color: var(--sp-band-ink);
}

.sp-chips-label strong {
  display: block;
  font-size: var(--sp-md);
  font-weight: 600;
}

.sp-chips-label small {
  color: var(--sp-quiet);
  display: block;
  font-size: var(--sp-sm);
  line-height: 1.45;
  margin-top: 2px;
}

.sp-chips-row.is-dark .sp-chips-label small {
  color: var(--sp-band-ink);
  opacity: 0.65;
}

.sp-chips ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
  list-style: none;
  margin: 0;
  padding: 0;
}

.sp-chips li {
  border: 1px solid var(--sp-rule);
  border-radius: 999px;
  font-size: var(--sp-sm);
  font-weight: 500;
  padding: 4px 11px;
  white-space: nowrap;
}

.sp-chips-row.is-dark li {
  border-color: rgba(255, 255, 255, 0.28);
}

/* timeline */
.sp-timeline {
  display: grid;
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
}

.sp-timeline::before {
  background: var(--sp-rule);
  bottom: 0;
  content: "";
  left: 63px;
  position: absolute;
  top: 0;
  width: 1px;
}

.sp-timeline li {
  display: grid;
  gap: var(--space-2xs) var(--space-md);
  grid-template-columns: 52px minmax(0, 1fr);
  padding: var(--space-sm) 0 var(--space-sm) 0;
  position: relative;
}

.sp-timeline li > div::before {
  background: var(--sp-paper);
  border: 1.5px solid var(--sp-ink);
  border-radius: 999px;
  content: "";
  height: 9px;
  left: -17px;
  position: absolute;
  top: 5px;
  width: 9px;
}

.sp-timeline li.is-year {
  margin-top: var(--space-md);
}

.sp-timeline li:first-child {
  margin-top: 0;
}

.sp-tl-year {
  color: var(--sp-ink);
  font-size: var(--sp-lg);
  font-weight: 300;
  grid-column: 1 / -1;
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-2xs);
}

.sp-timeline time {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
  white-space: nowrap;
}

.sp-timeline li > div {
  display: grid;
  gap: 3px;
  padding-left: var(--space-lg);
  position: relative;
}

.sp-timeline strong {
  font-size: var(--sp-md);
  font-weight: 600;
  line-height: 1.3;
}

.sp-timeline small {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.5;
}

.sp-timeline a {
  color: var(--sp-ink);
  font-size: var(--sp-xs);
  text-decoration: underline;
  text-decoration-color: var(--sp-rule);
  text-underline-offset: 3px;
  width: fit-content;
}

.sp-timeline a:hover {
  text-decoration-color: var(--sp-ink);
}

.sp-timeline a svg {
  vertical-align: -1px;
}

/* network */
.sp-network svg {
  display: none;
  height: auto;
  width: 100%;
}

.sp-net-line {
  stroke: var(--sp-rule);
  stroke-width: 1;
}

.sp-net-center {
  fill: var(--sp-band);
}

.sp-net-center-t {
  fill: var(--sp-band-ink);
  font-family: var(--sp-font-body);
  font-size: var(--sp-sm);
  font-weight: 500;
}

.sp-net-center-s {
  fill: var(--sp-band-ink);
  font-family: var(--sp-font-body);
  font-size: var(--sp-xs);
  opacity: 0.65;
}

.sp-net-node circle {
  fill: var(--sp-paper);
  stroke: var(--sp-accent);
  stroke-width: 1.5;
}

.sp-net-t {
  fill: var(--sp-ink);
  font-family: var(--sp-font-body);
  font-size: var(--sp-sm);
  font-weight: 600;
}

.sp-net-s {
  fill: var(--sp-quiet);
  font-family: var(--sp-font-body);
  font-size: var(--sp-xs);
}

.sp-net-list {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.sp-net-list li {
  border-top: 1px solid var(--sp-rule);
  display: grid;
  gap: 2px;
  padding: var(--space-xs) 0;
}

.sp-net-list strong {
  font-size: var(--sp-sm);
  font-weight: 600;
}

.sp-net-list small {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
}

/* screenshots + photo */
.sp-shots {
  display: grid;
  gap: var(--space-md);
}

.sp-shot img {
  aspect-ratio: 16 / 9;
  background: var(--sp-soft);
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
}

.sp-shot p {
  color: var(--sp-quiet);
  display: grid;
  font-size: var(--sp-sm);
  gap: var(--space-xs);
  grid-template-columns: 24px minmax(0, 1fr);
  line-height: 1.5;
  margin-top: var(--space-xs);
}

.sp-shot p span {
  color: var(--sp-ink);
  font-size: var(--sp-xs);
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}

.sp-photo {
  margin: 0 0 clamp(var(--space-2xl), 6vw, var(--space-4xl));
}

.sp-photo img {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  display: block;
  filter: grayscale(1) contrast(1.05);
  height: auto;
  object-fit: cover;
  width: 100%;
}

.sp-photo p {
  color: var(--sp-quiet);
  font-size: var(--sp-sm);
  line-height: 1.5;
  margin-top: var(--space-xs);
  padding-top: var(--space-2xs);
}

.sp-group-img {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  display: block;
  height: auto;
  margin-top: var(--space-lg);
  max-width: 420px;
  object-fit: cover;
  width: 100%;
}

@media (min-width: 40rem) {
  .sp-flow {
    grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr));
  }

  .sp-flow li {
    border-top: 0;
    grid-template-columns: minmax(0, 1fr);
    padding: 0 var(--space-sm) 0 0;
  }

  .sp-flow li + li {
    border-left: 1px solid var(--sp-rule);
    padding-left: var(--space-sm);
  }

  .sp-flow-num {
    grid-row: auto;
    margin-bottom: var(--space-2xs);
  }

  .sp-flow li + li .sp-flow-num::before {
    content: "→ ";
  }

  .sp-stack-layer {
    grid-template-columns: 30px minmax(0, 1fr) auto;
  }

  .sp-stack-layer em {
    grid-column: auto;
    padding-top: 3px;
    text-align: right;
  }

  .sp-chips-row {
    grid-template-columns: minmax(180px, 0.6fr) minmax(0, 1.4fr);
  }

  .sp-network svg {
    display: block;
  }

  .sp-net-list {
    display: none;
  }

  .sp-shots {
    grid-template-columns: repeat(var(--n, 2), minmax(0, 1fr));
  }
}

@media (min-width: 60rem) {
  .sp-group-img {
    max-width: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .sp-system-map .sp-map-node {
    transition: none;
  }
}

.sp-rail-img {
  aspect-ratio: 3 / 2;
  border-radius: var(--r-md);
  display: block;
  height: auto;
  margin-bottom: var(--space-lg);
  object-fit: cover;
  width: 100%;
}

.sp-article > .sp-fig:first-child {
  margin-top: clamp(var(--space-lg), 5vw, var(--space-2xl));
}

/* --- design pass: glyphs, cards, related, prose links ------------------- */

.sp-glyph {
  display: inline-block;
  flex: none;
  vertical-align: middle;
}

.sp-chapter-icon {
  align-items: center;
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  color: var(--sp-ink);
  display: inline-flex;
  grid-column: 2;
  grid-row: 1;
  height: 40px;
  justify-content: center;
  width: 40px;
}

.sp-chapter:hover .sp-chapter-icon {
  border-color: var(--sp-accent);
  color: var(--sp-accent);
}

.sp-hero-logo {
  color: var(--sp-accent);
}

.sp-hero-logo:has(> .sp-glyph) {
  height: 56px;
  padding: 0;
  width: 56px;
}

.sp-group-head h3 .sp-group-index {
  display: inline-block;
  margin-right: var(--space-sm);
  vertical-align: middle;
}

.sp-index-group a,
.sp-dossier-index > a {
  align-items: center;
  display: flex;
  gap: 8px;
}

.sp-index-group a .sp-glyph {
  color: var(--sp-quiet);
}

.sp-index-group a:hover .sp-glyph,
.sp-index-group a[aria-current="page"] .sp-glyph {
  color: var(--sp-accent);
}

.sp-related {
  display: grid;
  gap: var(--space-sm);
  padding: clamp(var(--space-xl), 5vw, var(--space-2xl)) 0 0;
}

.sp-related .eyebrow {
  margin-bottom: 0;
}

.sp-related > div {
  display: grid;
  gap: var(--space-2xs);
}

.sp-related a {
  align-items: center;
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-md);
  color: var(--sp-ink);
  display: grid;
  gap: var(--space-sm);
  grid-template-columns: 20px minmax(0, 1fr);
  padding: var(--space-sm) var(--space-md);
  text-decoration: none;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.sp-related a .sp-glyph {
  color: var(--sp-quiet);
}

.sp-related a:hover {
  border-color: var(--sp-accent);
}

.sp-related a:hover .sp-glyph {
  color: var(--sp-accent);
}

.sp-related a span {
  display: grid;
  gap: 2px;
}

.sp-related strong {
  font-size: var(--sp-sm);
  font-weight: 500;
  line-height: 1.3;
}

.sp-related small {
  color: var(--sp-quiet);
  font-size: var(--sp-xs);
}

.sp-pn strong .sp-glyph {
  color: var(--sp-quiet);
  margin-right: 8px;
}

.sp-page .prose .sp-xlink,
.sp-matrix a,
.sp-chips a,
.sp-flow em a,
.sp-net-list a,
.sp-stack-layer a {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: var(--sp-rule);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.sp-page .prose .sp-xlink:hover,
.sp-matrix a:hover,
.sp-chips a:hover,
.sp-flow em a:hover,
.sp-net-list a:hover,
.sp-stack-layer a:hover {
  color: var(--sp-accent);
  text-decoration-color: currentColor;
}

.sp-page .blk-grid .card,
.sp-page .blk-steps .step {
  padding-top: var(--space-xs);
}

.sp-page .blk-grid .card h3::before {
  background: var(--sp-accent);
  border-radius: 999px;
  content: "";
  display: inline-block;
  height: 6px;
  margin-right: 10px;
  vertical-align: 2px;
  width: 6px;
}

.sp-rail-img {
  margin-bottom: var(--space-md);
}

@media (min-width: 40rem) {
  .sp-related > div {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.sp-hero-chapter {
  padding-bottom: clamp(var(--space-lg), 4vw, var(--space-xl));
}

.sp-photo img {
  aspect-ratio: 16 / 9;
}


/* ---------------------------------------------------------------------------
   Dossier, third pass: source material carries the page; rules retreat to
   hairlines between list rows and one segmented line per major section. */

.sp-hero {
  align-items: center;
}

.sp-hero-meta {
  border-top: 0;
  margin-top: var(--space-lg);
  padding-top: 0;
}

.sp-hero-meta span + span::before {
  content: "·";
  margin-right: var(--space-md);
  opacity: 0.5;
}

.sp-hero-logo {
  background: transparent;
  border: 0;
  height: auto;
  padding: 0;
  width: auto;
}

.sp-hero-logo:has(> .sp-glyph) {
  height: auto;
  width: auto;
}

.sp-source {
  display: grid;
  gap: var(--space-xs);
  margin: 0;
  min-width: 0;
}

.sp-source a:first-child {
  display: block;
}

.sp-source img {
  aspect-ratio: 16 / 9;
  background: var(--sp-soft);
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-xl, 14px);
  display: block;
  height: auto;
  object-fit: cover;
  object-position: top;
  width: 100%;
}

.sp-source-hero img {
}

.sp-source figcaption {
  color: var(--sp-quiet);
  display: flex;
  flex-wrap: wrap;
  font-size: var(--sp-sm);
  gap: var(--space-2xs) var(--space-sm);
  justify-content: space-between;
  line-height: 1.5;
}

.sp-source figcaption a {
  color: var(--sp-quiet);
  text-decoration: none;
  white-space: nowrap;
}

.sp-source figcaption a:hover {
  color: var(--sp-ink);
}

.sp-source figcaption svg {
  vertical-align: -1px;
}

/* figures: no boxes, no glyph tiles */
.sp-fig {
  gap: var(--space-lg);
}

.sp-fig figcaption {
  grid-template-columns: minmax(0, 1fr);
}

.sp-fig figcaption .sp-glyph {
  display: none;
}

.sp-fig figcaption strong {
  font-size: var(--sp-h3);
  font-weight: 300;
  letter-spacing: -0.02em;
}

.sp-flow li + li {
  border-left: 0;
  padding-left: 0;
}

.sp-flow li {
  padding-right: var(--space-lg);
}

.sp-flow-num {
  color: var(--sp-accent);
}

.sp-flow-owners {
  border-top: 0;
  padding-top: var(--space-2xs);
}

.sp-stack-layer {
  border: 0;
  border-radius: 0;
  border-top: 1px solid var(--sp-rule);
  margin: 0;
  padding: var(--space-sm) 0;
}

.sp-stack-layer:first-child {
  border-top: 0;
  padding-top: 0;
}

.sp-stack-layer > span {
  color: var(--sp-accent);
}

.sp-stack-foundation {
  margin-top: var(--space-sm);
}

.sp-chips-row {
  border: 0;
  border-radius: 0;
  border-top: 1px solid var(--sp-rule);
  padding: var(--space-sm) 0;
}

.sp-chips-row:first-child {
  border-top: 0;
  padding-top: 0;
}

.sp-chips-row.is-dark {
  border-radius: var(--r-md);
  margin-top: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
}

.sp-chips li {
  background: var(--sp-soft);
  border: 0;
  border-radius: var(--r-md);
  font-weight: 500;
}

.sp-chips-row.is-dark li {
  background: rgba(255, 255, 255, 0.12);
}

.sp-matrix thead th {
  border-bottom: 1px solid var(--sp-rule);
}

.sp-shot img,
.sp-photo img,
.sp-analysis-shot img {
  border: 1px solid var(--sp-rule);
}

/* blocks: numbers and whitespace instead of rules */
.sp-page .blk-stats {
  border-top: 0;
  gap: var(--space-lg) var(--space-xl);
}

.sp-page .blk-stats .stat + .stat {
  border-left: 0;
  padding-left: 0;
}

.sp-page .blk-stats .stat {
  padding: 0;
}

.sp-page .blk-grid .card:nth-child(even),
.sp-page .blk-steps .step:nth-child(even) {
  border-left: 0;
  padding-left: 0;
}

.sp-page .blk-grid .card,
.sp-page .blk-steps .step {
  padding: var(--space-xs) var(--space-xl) var(--space-md) 0;
}

.sp-page .blk-steps .num {
  color: var(--sp-accent);
}

.sp-page .blk-faq {
  border-top: 0;
}

.sp-page .blk-checklist ul {
  border-top: 0;
}

/* directory */
.sp-groups {
  border-top: 0;
}

.sp-group + .sp-group {
  border-top: 1px solid var(--sp-rule);
}

.sp-group-img {
  aspect-ratio: 16 / 9;
  border: 1px solid var(--sp-rule);
  border-radius: var(--r-lg);
  margin-top: var(--space-lg);
}

.sp-chapter-icon {
  background: transparent;
  border: 0;
  color: var(--sp-quiet);
  height: 24px;
  width: 24px;
}

.sp-chapter:hover .sp-chapter-icon {
  color: var(--sp-accent);
}

.sp-chapter + .sp-chapter {
  border-top: 1px solid color-mix(in srgb, var(--sp-rule) 60%, transparent);
}

.sp-rail-img {
  display: none;
}

/* related, evidence, prev/next */
.sp-related a {
  border: 0;
  border-radius: 0;
  border-top: 1px solid var(--sp-rule);
  padding: var(--space-sm) 0;
}

.sp-related a:hover {
  border-color: var(--sp-rule);
}

.sp-related a:hover strong {
  color: var(--sp-accent);
}

.sp-evidence {
  border-top: 1px solid var(--sp-rule);
}

.sp-prevnext {
  border-top: 1px solid var(--sp-rule);
}

.sp-pn {
  border-bottom: 0;
}

@media (min-width: 40rem) {
  .sp-page .blk-stats {
    grid-template-columns: repeat(var(--n, 4), minmax(0, 1fr));
  }

  .sp-page .blk-grid .card:nth-child(n + 3),
  .sp-page .blk-steps .step:nth-child(n + 3) {
    border-top: 0;
  }

  .sp-related > div {
    gap: 0 var(--space-xl);
  }

  .sp-related a:first-child {
    border-top: 1px solid var(--sp-rule);
  }
}

@media (min-width: 60rem) {
  .sp-hero {
    grid-template-columns: minmax(0, 6fr) minmax(380px, 6fr);
  }

  .sp-hero-chapter {
    grid-template-columns: minmax(0, 5fr) minmax(400px, 7fr);
  }

  .sp-hero-chapter h1 {
    font-size: var(--sp-h1-chapter);
    hyphens: manual;
    max-width: 18ch;
    overflow-wrap: normal;
  }

  .sp-group {
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
  }
}

/* Tables scroll inside their container on phones; show that there is more. */
.sp-matrix-wrap {
  position: relative;
  scrollbar-width: thin;
}

@media (max-width: 40rem) {
  .sp-matrix-wrap::after {
    background: linear-gradient(to right, transparent, var(--sp-paper));
    bottom: 0;
    content: "";
    pointer-events: none;
    position: absolute;
    right: 0;
    top: 0;
    width: 40px;
  }

  .sp-matrix {
    padding-right: 24px;
  }
}

/* official House of Communication lockups are ~10:1 — give them their width */
.sp-hero-logo:not(.sp-logo-count-2):not(.sp-logo-count-3):not(:has(> .sp-glyph)) { width: auto; padding: 0; background: none; border: 0; height: auto; }
.sp-hero-logo:not(.sp-logo-count-2):not(.sp-logo-count-3) > img { width: auto; max-width: 260px; height: 25px; object-position: left center; }
.sp-chapter-logo:not(.sp-logo-count-2):not(.sp-logo-count-3) > img { width: auto; max-width: 200px; height: 20px; object-position: left center; }

@media (max-width: 40rem) {
  .sp-matrix-logos tbody th { min-width: 150px; }
  .sp-matrix-logos tbody th img { max-width: 170px; height: 24px; min-width: 0; }
}

/* The rail scrolls inside itself when the chapter list outgrows the viewport.
   Without a fade the last row is sliced mid-word and reads as broken text
   rather than as "there is more below". */
.sp-reading-rail {
  -webkit-mask-image: linear-gradient(to bottom, #000 calc(100% - 30px), transparent 100%);
  mask-image: linear-gradient(to bottom, #000 calc(100% - 30px), transparent 100%);
  scrollbar-width: none;
}

.sp-reading-rail::-webkit-scrollbar { width: 0; height: 0; }