.page-strength {
  --sx-rule: var(--border-thin) solid var(--color-line);
  --sx-rule-strong: var(--border-thin) solid var(--color-contrast-line);
  --sx-space-l: calc(var(--space-6) + var(--space-6));
  display: block;
  background: var(--color-surface);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  overflow-x: hidden;
}

.page-strength .container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
  box-sizing: border-box;
}

.page-strength h1,
.page-strength h2,
.page-strength h3 {
  font-family: var(--font-heading);
  font-weight: var(--weight-heading);
  color: var(--color-ink);
  letter-spacing: var(--tracking-heading);
  line-height: var(--leading-heading);
}

.page-strength a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 200ms ease, box-shadow 200ms ease;
}

.page-strength a:hover,
.page-strength a:focus-visible {
  color: var(--color-focus);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-strength a:focus-visible,
.page-strength summary:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 3px;
}

.page-strength .num,
.page-strength .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- hero ---------- */

.page-strength .sx-hero {
  padding-block: calc(var(--space-8) * 1.5) var(--space-8);
}

.page-strength .sx-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-1);
  margin: 0 0 var(--space-6);
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
}

.page-strength .sx-crumb li {
  display: inline-flex;
  align-items: center;
}

.page-strength .sx-crumb li + li::before {
  content: "/";
  margin-inline: var(--space-1);
  color: var(--color-line);
}

.page-strength .sx-hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-8);
  align-items: end;
}

.page-strength .sx-hero__title {
  margin: var(--space-3) 0 0;
  font-size: var(--text-display);
  text-wrap: balance;
}

.page-strength .sx-hero__lede {
  max-width: 34ch;
  margin: var(--space-4) 0 0;
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-ink);
}

.page-strength .sx-hero__note {
  max-width: 46ch;
  margin: var(--space-3) 0 0;
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-strength .sx-stats {
  margin: 0;
  border-top: var(--sx-rule);
}

.page-strength .sx-stats__item {
  display: flex;
  flex-direction: column-reverse;
  align-items: flex-start;
  gap: var(--space-1);
  padding-block: var(--space-4);
  border-bottom: var(--sx-rule);
}

.page-strength .sx-stats__label {
  font-size: var(--text-sm);
  letter-spacing: 0.06em;
  color: var(--color-ink-muted);
}

.page-strength .sx-stats__body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-2);
  margin: 0;
}

.page-strength .sx-stats__value {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-ink);
}

.page-strength .sx-stats__unit {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-ink-soft);
}

.page-strength .sx-stats__note {
  flex: 1 1 14ch;
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-soft);
}

.page-strength .sx-hero__media {
  margin: var(--space-8) 0 0;
}

.page-strength .sx-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-strength .media__caption {
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  line-height: 1.6;
  color: var(--color-ink-muted);
}

/* ---------- chapters & cases ---------- */

.page-strength .sx-chapter {
  padding-block: var(--space-8);
}

.page-strength .sx-chapter__head {
  max-width: var(--measure);
  margin-bottom: var(--space-8);
}

.page-strength .sx-chapter__title {
  margin: var(--space-2) 0 0;
  font-size: var(--text-2xl);
}

.page-strength .sx-chapter__lede {
  margin: var(--space-3) 0 0;
  max-width: 46ch;
  color: var(--color-ink-soft);
}

.page-strength .sx-case {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-8);
  border-top: var(--sx-rule);
}

.page-strength .sx-case__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  align-items: flex-start;
}

.page-strength .sx-case__index {
  font-size: var(--text-xs);
  letter-spacing: 0.18em;
  color: var(--color-ink-muted);
}

.page-strength .sx-case__context {
  margin: 0;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-primary);
  font-size: var(--text-sm);
  line-height: 1.75;
  color: var(--color-ink-soft);
}

.page-strength .sx-note {
  width: 100%;
  padding-top: var(--space-2);
  border-top: var(--sx-rule);
}

.page-strength .sx-note__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-1);
  cursor: pointer;
  list-style: none;
  transition: color 200ms ease;
}

.page-strength .sx-note__summary::-webkit-details-marker {
  display: none;
}

.page-strength .sx-case__figure {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--text-figure);
  line-height: 1;
  color: var(--color-ink);
  transition: color 200ms ease;
}

.page-strength .sx-case__unit {
  font-size: var(--text-sm);
  color: var(--color-ink-soft);
}

.page-strength .sx-note__cue {
  margin-left: auto;
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  color: var(--color-ink-muted);
}

.page-strength .sx-note__cue::after {
  content: " +";
  font-family: var(--font-mono);
}

.page-strength .sx-note[open] .sx-note__cue::after {
  content: " −";
}

.page-strength .sx-note__summary:hover .sx-case__figure,
.page-strength .sx-note__summary:focus-visible .sx-case__figure {
  color: var(--color-accent);
}

.page-strength .sx-note__summary:hover .sx-note__cue,
.page-strength .sx-note__summary:focus-visible .sx-note__cue {
  color: var(--color-accent);
}

.page-strength .sx-note__body {
  margin: var(--space-3) 0 0;
  padding-left: var(--space-3);
  border-left: var(--border-thin) solid var(--color-line);
  font-size: var(--text-sm);
  line-height: 1.7;
  color: var(--color-ink-muted);
}

.page-strength .sx-case__body {
  min-width: 0;
}

.page-strength .sx-case__title {
  margin: 0;
  font-size: var(--text-lg);
  transition: color 200ms ease;
}

.page-strength .sx-case__text {
  margin: var(--space-3) 0 0;
  max-width: var(--measure);
  color: var(--color-ink-soft);
  transition: color 220ms ease;
}

.page-strength .sx-case:has(.sx-case__title:hover) .sx-case__text,
.page-strength .sx-case:has(.sx-case__title:focus-visible) .sx-case__text {
  color: var(--color-ink);
}

.page-strength .sx-case__media {
  margin: var(--space-6) 0 0;
  max-width: 620px;
}

.page-strength .sx-case__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- common traits ---------- */

.page-strength .sx-common {
  padding-block: var(--space-8) var(--section-y);
}

.page-strength .sx-common__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-6);
}

.page-strength .sx-study {
  margin: 0;
  border-top: var(--sx-rule);
}

.page-strength .sx-study__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-2);
  padding-block: var(--space-4);
  border-bottom: var(--sx-rule);
}

.page-strength .sx-study__key {
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: var(--leading-heading);
  color: var(--color-ink);
}

.page-strength .sx-study__body {
  margin: 0;
  max-width: 52ch;
  color: var(--color-ink-soft);
}

.page-strength .sx-common__tail {
  margin: var(--space-8) 0 0;
  max-width: var(--measure);
  padding-left: var(--space-4);
  border-left: var(--border-thin) solid var(--color-primary);
  font-family: var(--font-heading);
  font-size: var(--text-lg);
  line-height: 1.5;
  color: var(--color-ink);
}

/* ---------- closing contrast band ---------- */

.page-strength .sx-cta {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  background: var(--color-contrast-surface);
  color: var(--color-contrast-ink);
  padding-block: var(--space-8);
}

.page-strength .sx-cta__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.page-strength .sx-cta__scrim {
  position: absolute;
  inset: 0;
  background: var(--overlay-scrim);
  z-index: -1;
}

.page-strength .sx-cta .sx-cta__inner {
  position: relative;
}

.page-strength .sx-cta__eyebrow {
  margin: 0;
  font-size: var(--text-xs);
  letter-spacing: 0.22em;
  color: var(--color-contrast-accent);
}

.page-strength .sx-cta__title {
  margin: var(--space-3) 0 0;
  max-width: 22ch;
  font-size: var(--text-2xl);
  color: var(--color-contrast-ink);
}

.page-strength .sx-cta__text {
  margin: var(--space-4) 0 0;
  max-width: 58ch;
  color: var(--color-contrast-ink);
}

.page-strength .sx-cta__links {
  margin: var(--space-6) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--space-1);
  border-top: var(--sx-rule-strong);
}

.page-strength .sx-cta__links li {
  padding-block: var(--space-3);
  border-bottom: var(--sx-rule-strong);
}

.page-strength .sx-cta__links a {
  display: block;
  color: var(--color-contrast-accent);
  font-size: var(--text-base);
}

.page-strength .sx-cta__links a:hover,
.page-strength .sx-cta__links a:focus-visible {
  color: var(--color-contrast-ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

/* ---------- responsive ---------- */

@media (min-width: 700px) {
  .page-strength .sx-study__row {
    grid-template-columns: 3fr 9fr;
    gap: var(--space-4);
    align-items: baseline;
  }

  .page-strength .sx-cta__links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--space-6);
  }
}

@media (min-width: 900px) {
  .page-strength .sx-hero {
    padding-block: calc(var(--space-8) * 2) var(--space-8);
  }

  .page-strength .sx-hero__inner {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-strength .sx-hero__lead {
    grid-column: span 8;
    padding-right: var(--space-6);
  }

  .page-strength .sx-stats {
    grid-column: span 4;
  }

  .page-strength .sx-chapter__title {
    font-size: var(--text-3xl);
  }

  .page-strength .sx-case {
    grid-template-columns: 3fr 9fr;
    gap: var(--sx-space-l);
    padding-block: var(--space-8) calc(var(--space-8) + var(--space-6));
  }

  .page-strength .sx-case--alt {
    background: var(--color-surface-alt);
    padding-inline: var(--space-6);
    margin-inline: calc(var(--space-6) * -1);
  }

  .page-strength .sx-case__title {
    font-size: var(--text-xl);
  }

  .page-strength .sx-case__media {
    max-width: none;
  }

  .page-strength .sx-common__grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: var(--gutter);
  }

  .page-strength .sx-common__head {
    grid-column: span 5;
    padding-right: var(--space-6);
  }

  .page-strength .sx-study {
    grid-column: span 7;
  }

  .page-strength .sx-cta {
    padding-block: var(--section-y);
  }
}

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