.section-page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-lg) var(--spacing-2xl);
}

.section-page__masthead {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 4rem minmax(0, 1fr);
  min-height: 22rem;
  background-image: var(--section-feature-image);
  background-position: center;
  background-size: cover;
  border-top: 3px solid var(--text-primary);
  border-bottom: 1px solid var(--border-strong);
}

.section-page__masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: oklch(96% 0.018 230 / 0.82);
}

.section-page__rail {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: var(--spacing-md) var(--spacing-sm);
  border-right: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.68rem;
  writing-mode: vertical-rl;
  text-transform: uppercase;
}

.section-page__intro {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--spacing-xl) clamp(var(--spacing-lg), 6vw, 6rem);
}

.section-page__eyebrow,
.section-page__list-kicker {
  color: var(--accent);
  font-family: var(--font-code);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-page__intro h1 {
  margin: 0.45rem 0 0.75rem;
  color: var(--text-primary);
  font-family: var(--font-code);
  font-size: clamp(4rem, 12vw, 8.5rem);
  font-weight: 700;
  letter-spacing: -0.09em;
  line-height: 0.82;
}

.section-page__description {
  max-width: 34rem;
  margin: 0;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  line-height: 1.5;
}

.section-page__stamp {
  display: grid;
  align-content: space-between;
  padding: var(--spacing-md);
  color: var(--bg-primary);
  background: var(--text-primary);
  font-family: var(--font-code);
  font-size: 0.7rem;
  text-align: right;
  text-transform: uppercase;
}

.section-page__stamp strong {
  color: oklch(82% 0.15 205);
  font-size: 4rem;
  font-weight: 400;
  line-height: 1;
}

.section-page__feature {
  min-height: 22rem;
  margin: 0;
  overflow: hidden;
  border-left: 1px solid var(--border-strong);
  background: var(--bg-card);
}

.section-page__feature img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.86) contrast(1.03);
}

.section-page__meta {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
  padding: 0.7rem 0;
  border-bottom: 1px solid var(--border-strong);
  color: var(--text-muted);
  font-family: var(--font-code);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
}

.section-page__meta { display: none; }

.section-page__meta span:first-child { color: var(--accent); }
.section-page__meta span:last-child { margin-left: auto; }

/* The frame carries the hierarchy; repeated archive labels add noise. */
.section-page__rail span,
.section-page__meta span { visibility: hidden; }

.section-page__content {
  max-width: 72ch;
  margin: var(--spacing-xl) auto 0;
  padding: 0 clamp(0rem, 4vw, 3rem);
}

.section-page__content > :first-child { margin-top: 0; }
.section-page__content > :last-child { margin-bottom: 0; }
.section-page__content h1,
.section-page__content h2,
.section-page__content h3 { color: var(--text-primary); letter-spacing: -0.02em; }
.section-page__content blockquote { margin-top: 0; background: transparent; border-left-color: var(--accent); }

/* Posts index already has generated section cards. Keep its invitation line and
   remove the old Markdown link list so one destination has one visual entry. */
.section-page--posts .section-page__content > :not(blockquote) { display: none; }

.section-page__subsections,
.section-page__entries { margin-top: var(--spacing-2xl); }

.section-page__list-heading {
  display: flex;
  align-items: baseline;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--text-primary);
}

.section-page__list-heading h2 {
  margin: 0;
  color: var(--text-primary);
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.1;
}

.section-page__section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--border-strong);
  border: 1px solid var(--border-strong);
}

.section-page__section-card {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) 1.5rem;
  gap: var(--spacing-md);
  align-items: start;
  min-height: 8rem;
  padding: var(--spacing-lg);
  color: var(--text-primary);
  background-color: var(--bg-card);
  background-image: var(--section-card-image);
  background-position: center;
  background-size: cover;
  text-decoration: none;
  transition: background-color var(--transition-speed) var(--transition-fn), color var(--transition-speed) var(--transition-fn), transform var(--transition-speed) var(--transition-fn);
}

.section-page__section-card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: oklch(98% 0.01 230 / 0.82);
}

.section-page__section-card:hover,
.section-page__section-card:focus-visible {
  color: var(--bg-primary);
  background: var(--text-primary);
  transform: translate(4px, -4px);
}

.section-page__section-card:hover::before,
.section-page__section-card:focus-visible::before { background: oklch(25% 0.025 245 / 0.72); }

.section-page__section-number,
.section-page__entry-number { color: var(--accent); font-family: var(--font-code); font-size: 0.75rem; }

.section-page__section-main { display: grid; gap: 0.5rem; }
.section-page__section-main strong { font-family: var(--font-display); font-size: 1.45rem; line-height: 1.1; }
.section-page__section-main small,
.section-page__entry a small { color: var(--text-muted); font-size: var(--font-size-sm); line-height: 1.45; }
.section-page__section-card:hover .section-page__section-main small,
.section-page__section-card:focus-visible .section-page__section-main small { color: var(--bg-secondary); }
.section-page__section-arrow,
.section-page__entry-arrow { color: var(--accent); font-family: var(--font-code); font-size: 1.25rem; text-align: right; }

.section-page__entry-list { border-top: 0; }
.section-page__entries .section-page__list-heading { margin-bottom: var(--spacing-md); border-bottom: 0; }

.section-page__entry {
  display: grid;
  grid-template-columns: 2.5rem 7.5rem minmax(0, 1fr) 1.5rem;
  gap: var(--spacing-md);
  align-items: baseline;
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}

.section-page__entry time { color: var(--text-muted); font-family: var(--font-code); font-size: 0.75rem; white-space: nowrap; }
.section-page__entry a { display: grid; gap: 0.25rem; color: var(--text-primary); text-decoration: none; }
.section-page__entry a strong { font-family: var(--font-display); font-size: 1.18rem; }
.section-page__entry a:hover strong,
.section-page__entry a:focus-visible strong { color: var(--accent); }

@media (max-width: 720px) {
  .section-page { padding-top: var(--spacing-lg); }
  .section-page__masthead { grid-template-columns: 2.5rem minmax(0, 1fr) 4.5rem; min-height: 20rem; }
  .section-page__intro { padding: var(--spacing-lg); }
  .section-page__rail { font-size: 0.58rem; }
  .section-page__stamp strong { font-size: 2.5rem; }
  .section-page__feature { grid-column: 2; min-height: 12rem; border-top: 1px solid var(--border-strong); border-left: 0; }
  .section-page__meta { gap: var(--spacing-sm); font-size: 0.6rem; }
  .section-page__meta span:last-child { display: none; }
  .section-page__content { padding-left: var(--spacing-md); }
  .section-page__section-grid { grid-template-columns: 1fr; }
  .section-page__entry { grid-template-columns: 2rem minmax(0, 1fr) 1.25rem; }
  .section-page__entry time { grid-column: 2; grid-row: 1; }
  .section-page__entry a { grid-column: 2; grid-row: 2; }
  .section-page__entry-arrow { grid-column: 3; grid-row: 1 / span 2; }
}

@media (prefers-reduced-motion: reduce) {
  .section-page__section-card:hover,
  .section-page__section-card:focus-visible { transform: none; }
}