.research-page .site-nav a[aria-current="page"] {
  background: color-mix(in srgb, currentColor 14%, transparent);
}

.research-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  align-items: end;
  gap: 46px;
  min-height: 78svh;
  padding-top: 148px;
}

.research-hero-content {
  max-width: 820px;
}

.research-page h1 {
  max-width: 12ch;
  font-size: 5.2rem;
}

.research-rail {
  padding: 22px;
  border: 1px solid var(--hero-panel-line);
  border-radius: var(--radius);
  background: var(--hero-panel-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.direction-stack {
  display: grid;
  margin-top: 18px;
  border-top: 1px solid var(--hero-panel-divider);
}

.direction-link {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 6px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hero-panel-divider);
}

.direction-link:last-child {
  border-bottom: 0;
}

.direction-link span {
  grid-row: span 2;
  color: var(--hero-accent);
  font-size: 0.78rem;
  font-weight: 820;
  opacity: 0.82;
}

.direction-link strong {
  font-size: 0.98rem;
  line-height: 1.22;
}

.direction-link em {
  color: var(--hero-muted);
  font-size: 0.86rem;
  font-style: normal;
  line-height: 1.35;
}

.direction-link[aria-current="page"] strong,
.direction-link:hover strong,
.direction-link:focus-visible strong {
  color: var(--hero-accent);
}

.research-section {
  background: var(--paper);
}

.research-section-strong {
  background: var(--paper-strong);
}

.research-section-alt {
  background: var(--paper-alt);
}

.research-grid,
.entry-list,
.knowledge-grid,
.writing-map,
.page-return {
  width: min(100% - 48px, var(--max));
  margin: 0 auto;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.research-card,
.knowledge-card,
.writing-map article {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
  box-shadow: 0 1px 0 rgba(18, 20, 22, 0.04);
}

.research-card {
  display: flex;
  min-height: 270px;
  flex-direction: column;
  padding: 24px;
}

.research-card span,
.knowledge-card span,
.writing-map span,
.entry-type {
  color: var(--accent-warm);
  font-size: 0.78rem;
  font-weight: 840;
  text-transform: uppercase;
}

.research-card:nth-child(2) span,
.knowledge-card:nth-child(2) span,
.writing-map article:nth-child(2) span {
  color: var(--accent-blue);
}

.research-card:nth-child(3) span,
.knowledge-card:nth-child(3) span,
.writing-map article:nth-child(3) span {
  color: var(--accent-violet);
}

.research-card h3,
.knowledge-card h3,
.writing-map h3,
.entry-copy h3 {
  margin: 13px 0 10px;
  font-size: 1.28rem;
  line-height: 1.2;
}

.research-card p,
.knowledge-card p,
.writing-map p,
.entry-copy p {
  color: var(--muted);
}

.research-card p {
  flex: 1;
}

.tag-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tag-strip span {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 6px 8px;
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 760;
  text-transform: none;
}

.entry-list {
  display: grid;
  border-top: 1px solid var(--line);
}

.entry-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 28px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}

.entry-date {
  color: var(--muted);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9rem;
  font-weight: 780;
}

.entry-copy {
  max-width: 820px;
}

.entry-copy h3 {
  margin-top: 7px;
  font-size: 1.42rem;
}

.knowledge-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.knowledge-card {
  min-height: 250px;
  padding: 22px;
}

.knowledge-card p {
  margin-bottom: 0;
}

.writing-map {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: 16px;
}

.writing-map article {
  min-height: 230px;
  padding: 24px;
}

.writing-map article:first-child {
  grid-row: span 2;
  min-height: 476px;
}

.writing-map article:first-child h3 {
  font-size: 2.1rem;
}

.page-return {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 34px 0 58px;
  background: var(--paper);
}

.page-return .button-secondary {
  border-color: var(--line);
  background: var(--paper-strong);
  color: var(--ink);
}

@media (max-width: 1040px) {
  .research-grid,
  .knowledge-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .research-hero {
    grid-template-columns: 1fr;
    min-height: 86svh;
  }

  .research-page h1 {
    font-size: 4.1rem;
  }

  .research-rail {
    max-width: 520px;
  }

  .writing-map {
    grid-template-columns: 1fr;
  }

  .writing-map article:first-child {
    grid-row: auto;
    min-height: 300px;
  }
}

@media (max-width: 720px) {
  .research-hero,
  .research-grid,
  .entry-list,
  .knowledge-grid,
  .writing-map,
  .page-return {
    width: min(100% - 32px, var(--max));
  }

  .research-page h1 {
    font-size: 3rem;
  }

  .research-grid,
  .knowledge-grid {
    grid-template-columns: 1fr;
  }

  .entry-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .page-return {
    flex-direction: column;
  }
}

@media (max-width: 390px) {
  .research-page h1 {
    font-size: 2.6rem;
  }

  .research-card,
  .knowledge-card,
  .writing-map article,
  .research-rail {
    padding: 20px;
  }
}