/* ---------- Shared page header ---------- */
.page-head__grid {
  display: grid;
  gap: var(--space-m);
  align-items: end;
  padding-top: var(--space-s);
}

.page-head__main {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.page-head__label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--graphite);
}

.page-head__index {
  display: inline-grid;
  place-items: center;
  width: 1.75rem;
  height: 1.75rem;
  background: var(--ink);
  color: var(--paper);
}

.page-head__lede {
  max-width: 34em;
  font-size: var(--fs-lead);
  line-height: 1.8;
  color: var(--graphite);
  text-wrap: pretty;
}

@media (min-width: 64rem) {
  .page-head__grid {
    grid-template-columns: 7fr 5fr;
  }

  .page-head__aside {
    justify-self: end;
  }
}

.section--tight {
  padding-block: var(--space-m) var(--space-l);
}

.section-head {
  flex-wrap: wrap;
  align-items: baseline;
}

.section-head__label {
  flex-basis: 100%;
  color: var(--signal);
}

.section-head__title {
  font-size: var(--fs-h2);
  font-family: var(--font-body);
  font-weight: 700;
}

.section-head__link {
  margin-left: auto;
}

.section-head__count {
  font-family: var(--font-display);
  color: var(--graphite);
}

.article__related > .section-head__title,
.feature__related > .section-head__title {
  padding-bottom: var(--space-s);
  margin-bottom: var(--space-m);
  border-bottom: 1px solid var(--ink);
}

.section--inverse {
  background: var(--ink);
  color: var(--paper);
}

.section--inverse .section-head {
  border-color: var(--paper);
}

.section--inverse .section-head__label {
  color: color-mix(in srgb, var(--signal) 55%, var(--paper));
}

.section--inverse .entry-meta {
  color: color-mix(in srgb, var(--paper) 70%, var(--ink));
}

.section--inverse :focus-visible {
  outline-color: var(--paper);
}

/* ---------- Home ---------- */
.hero {
  background: var(--theme);
  color: var(--theme-ink);
  border-bottom: 1px solid var(--ink);
}

.hero__grid {
  display: grid;
  gap: var(--space-m);
  padding-block: var(--space-m) var(--space-l);
}

.hero__text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-s);
}

.hero__title {
  font-size: var(--fs-h1);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.hero__title a {
  text-decoration: none;
}

.hero__title a:hover {
  text-decoration: underline;
  text-decoration-thickness: 2px;
}

.hero__dek {
  max-width: 30em;
  font-size: var(--fs-lead);
  line-height: 1.75;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  font-size: var(--fs-meta);
  font-variant-numeric: tabular-nums;
}

.hero .button--theme {
  background: var(--theme-ink);
  border-color: var(--theme-ink);
  color: var(--theme);
}

.hero .button--theme:hover {
  background: transparent;
  color: var(--theme-ink);
}

.hero__media {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--ink);
}

.hero__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero :focus-visible {
  outline-color: var(--theme-ink);
}

@media (min-width: 64rem) {
  .hero__grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    padding-block: var(--space-l);
  }

  .hero__media {
    aspect-ratio: 16 / 11;
  }
}

.latest {
  display: grid;
  gap: var(--space-l) var(--gap);
}

@media (min-width: 64rem) {
  .latest {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }

  .latest__lead {
    position: sticky;
    top: calc(var(--header-h) + var(--space-s));
  }
}

.research-strip {
  display: grid;
  gap: var(--space-m) var(--gap);
}

.research-strip__item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: var(--space-s);
  border-top: 1px solid color-mix(in srgb, var(--paper) 40%, var(--ink));
}

.research-strip__title {
  font-family: var(--font-body);
  font-size: var(--fs-h2);
  line-height: 1.35;
}

.research-strip__title a {
  text-decoration: none;
}

.research-strip__title a:hover {
  text-decoration: underline;
}

.research-strip__finding {
  max-width: 32em;
  line-height: 1.75;
  color: color-mix(in srgb, var(--paper) 85%, var(--ink));
}

@media (min-width: 48rem) {
  .research-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.topic-index {
  display: grid;
  border-top: 1px solid var(--ink);
}

.topic-index__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 0.875rem;
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-h3);
  font-weight: 700;
  text-decoration: none;
  transition: padding var(--dur-fast) var(--ease-out);
}

.topic-index__link:hover {
  padding-left: 0.75rem;
  color: var(--signal);
}

.topic-index__count {
  font-family: var(--font-display);
  font-size: var(--fs-meta);
  color: var(--graphite);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 48rem) {
  .topic-index {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: var(--gap);
  }
}

/* ---------- Article / Research detail ---------- */
.article__head {
  padding-bottom: var(--space-m);
}

.article__head-grid {
  display: grid;
  gap: var(--space-m);
  padding-top: var(--space-m);
}

.article__titles {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.article__kicker {
  color: var(--signal);
}

.article__kicker a {
  text-decoration: none;
}

.article__title {
  overflow-wrap: anywhere;
  font-family: var(--font-body);
  font-size: var(--fs-h1);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0;
  max-width: 22em;
}

.article__dek {
  max-width: 34em;
  font-size: var(--fs-lead);
  line-height: 1.8;
  color: var(--graphite);
}

.article__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  align-self: end;
  border-top: 1px solid var(--ink);
}

.article__facts > div {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--rule);
}

.article__facts dt {
  font-family: var(--font-display);
  font-size: var(--fs-meta);
  font-weight: 600;
  color: var(--graphite);
}

.article__facts dd {
  font-size: var(--fs-small);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 64rem) {
  .article__head-grid {
    grid-template-columns: 8fr 4fr;
    gap: var(--gap);
  }

  .article__facts {
    grid-template-columns: 1fr;
  }
}

.article__media {
  margin-bottom: var(--space-l);
}

.wrap-wide {
  width: 100%;
}

.article__layout {
  display: grid;
  gap: var(--space-m);
}

.article__aside .toc {
  max-height: calc(100svh - var(--header-h) - 2rem);
  overflow-y: auto;
}

.article__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-l);
  min-width: 0;
}

.article__foot {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
  max-width: var(--measure);
}

@media (min-width: 64rem) {
  .article__layout.has-toc {
    grid-template-columns: 15rem minmax(0, 1fr);
    gap: var(--space-l);
  }

  .article__aside {
    position: sticky;
    top: calc(var(--header-h) + var(--space-s));
    align-self: start;
  }

  .article__layout:not(.has-toc) .article__body {
    margin-left: calc(15rem + var(--space-l));
  }
}

.article--essay .article__title {
  overflow-wrap: anywhere;
  max-width: 18em;
}

.article--essay .prose {
  --measure: 32em;
}

.findings {
  margin-bottom: var(--space-m);
  padding-block: var(--space-m);
  background: var(--ink);
  color: var(--paper);
}

.findings__title {
  margin-bottom: var(--space-s);
  font-size: var(--fs-meta);
  color: color-mix(in srgb, var(--signal) 55%, var(--paper));
}

.findings__list {
  display: grid;
  gap: var(--space-s) var(--gap);
  counter-reset: finding;
}

.findings__list li {
  display: flex;
  gap: 0.875rem;
  padding-top: 0.75rem;
  border-top: 1px solid color-mix(in srgb, var(--paper) 35%, var(--ink));
  font-size: var(--fs-lead);
  line-height: 1.7;
  counter-increment: finding;
}

.findings__list li::before {
  content: counter(finding);
  font-family: var(--font-display);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}

@media (min-width: 64rem) {
  .findings__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- Feature (scroll story) ---------- */
.feature__head {
  background: var(--theme);
  color: var(--theme-ink);
  padding-bottom: var(--space-m);
}

.feature__head :focus-visible {
  outline-color: var(--theme-ink);
}

.feature__head .breadcrumb {
  color: inherit;
  opacity: 0.85;
}

.feature__head-grid {
  display: grid;
  gap: var(--space-s) var(--gap);
  padding-block: var(--space-m) var(--space-l);
}

.feature__issue {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(6rem, 26vw, 20rem);
  font-variation-settings: 'wdth' 62;
  line-height: 0.78;
  letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}

.feature__titles {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.feature__title {
  font-family: var(--font-body);
  font-size: var(--fs-h1);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: 0;
}

.feature__dek {
  max-width: 32em;
  font-size: var(--fs-lead);
  line-height: 1.8;
}

.feature__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem 1rem;
  font-size: var(--fs-meta);
}

.feature__meta a {
  color: inherit;
}

@media (min-width: 64rem) {
  .feature__head-grid {
    grid-template-columns: 5fr 7fr;
    align-items: end;
  }
}

.chapter-nav ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-top: 1px solid currentColor;
}

.chapter-nav li {
  flex: 1 0 12rem;
}

.chapter-nav__link {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  height: 100%;
  padding: 0.75rem 1rem 0.75rem 0;
  font-size: var(--fs-small);
  font-weight: 500;
  line-height: 1.5;
  text-decoration: none;
  border-top: 3px solid transparent;
  margin-top: -2px;
}

.chapter-nav__no {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-meta);
}

.chapter-nav__link:hover,
.chapter-nav__link[aria-current='step'] {
  border-top-color: currentColor;
}

.story {
  display: grid;
  gap: var(--space-m);
  padding-top: var(--space-l);
}

.story__visual {
  position: sticky;
  top: var(--header-h);
  z-index: 1;
  align-self: start;
  margin-inline: calc(var(--margin) * -1);
  background: var(--paper);
}

.story__figure {
  display: flex;
  flex-direction: column;
}

.story__stage {
  aspect-ratio: 16 / 10;
  max-height: 42svh;
  width: 100%;
  overflow: hidden;
  background: var(--ink);
}

.story__stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out), object-position var(--dur-slow) var(--ease-out);
  will-change: transform;
}

.story__figure figcaption {
  display: flex;
  gap: 0.75rem;
  padding: 0.625rem var(--margin);
  border-bottom: 1px solid var(--rule);
  font-size: var(--fs-meta);
  line-height: 1.6;
  color: var(--graphite);
}

.story__step {
  flex: none;
  color: var(--theme);
  font-variant-numeric: tabular-nums;
}

.story__text {
  display: flex;
  flex-direction: column;
  gap: var(--space-l);
  min-width: 0;
}

.prose--feature section[data-chapter] {
  scroll-margin-top: calc(var(--header-h) + 1rem);
}

.prose--feature section[data-chapter] + section[data-chapter] {
  margin-top: var(--space-l);
}

.prose--feature h2 {
  border-top: 3px solid var(--theme);
}

@media (min-width: 64rem) {
  .story {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: var(--space-l);
  }

  .story__visual {
    top: calc(var(--header-h) + var(--space-s));
    margin-inline: 0;
  }

  .story__stage {
    aspect-ratio: 4 / 5;
    max-height: calc(100svh - var(--header-h) - 6rem);
  }

  .story__figure figcaption {
    padding-inline: 0;
  }
}

/* No JS: the figure is a normal image above the text. */
.no-js .story__visual {
  position: static;
}

@media (prefers-reduced-motion: reduce) {
  .story__visual {
    position: static;
  }

  .story__stage img {
    transform: none !important;
  }
}

/* ---------- Features index ---------- */
.issues {
  display: flex;
  flex-direction: column;
  gap: var(--space-l);
}

.issue__inner {
  position: relative;
  display: grid;
  background: var(--theme);
  color: var(--theme-ink);
}

.issue__media {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.issue__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease-out);
}

.issue__inner:hover .issue__media img {
  transform: scale(1.03);
}

.issue__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
  padding: var(--space-m);
}

.issue__no {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 8rem);
  font-weight: 900;
  font-variation-settings: 'wdth' 62;
  line-height: 0.8;
}

.issue__title {
  font-family: var(--font-body);
  font-size: var(--fs-h2);
  line-height: 1.35;
}

.issue__dek {
  max-width: 32em;
  line-height: 1.75;
}

.issue__chapters {
  display: flex;
  flex-direction: column;
  border-top: 1px solid currentColor;
  counter-reset: ch;
  font-size: var(--fs-small);
}

.issue__chapters li {
  display: flex;
  gap: 0.75rem;
  padding-block: 0.5rem;
  border-bottom: 1px solid color-mix(in srgb, currentColor 35%, transparent);
  counter-increment: ch;
}

.issue__chapters li::before {
  content: counter(ch, decimal-leading-zero);
  font-family: var(--font-display);
  font-weight: 700;
}

.issue .entry-meta {
  color: inherit;
  opacity: 0.85;
}

.issue :focus-visible,
.issue__inner:has(.card__link:focus-visible) {
  outline-color: var(--ink);
}

.issue__inner:has(.card__link:focus-visible) {
  outline: 3px solid var(--ink);
  outline-offset: 4px;
}

@media (min-width: 64rem) {
  .issue__inner {
    grid-template-columns: 1fr 1fr;
  }

  .issue:nth-child(even) .issue__media {
    order: 2;
  }

  .issue__media {
    aspect-ratio: auto;
    min-height: 100%;
  }

  .issue__body {
    padding: var(--space-l);
  }
}

/* ---------- Research index ---------- */
.studies {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--ink);
}

.study__inner {
  position: relative;
  display: grid;
  gap: var(--space-m);
  padding-block: var(--space-m);
  border-bottom: 1px solid var(--ink);
}

.study__media {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  background: var(--paper-deep);
}

.study__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.study__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.study__body > .label {
  color: var(--signal);
}

.study__title {
  font-family: var(--font-body);
  font-size: var(--fs-h2);
  line-height: 1.35;
}

.study__dek {
  max-width: 34em;
  line-height: 1.75;
  color: var(--graphite);
}

.spec {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  border-top: 1px solid var(--rule);
}

.spec > div {
  display: flex;
  flex-direction: column;
  gap: 0.125rem;
  padding: 0.625rem 0.75rem 0.625rem 0;
  border-bottom: 1px solid var(--rule);
}

.spec dt {
  font-family: var(--font-display);
  font-size: var(--fs-meta);
  font-weight: 600;
  color: var(--graphite);
}

.spec dd {
  font-size: var(--fs-small);
}

.study__findings {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.study__findings li {
  padding-left: 1rem;
  border-left: 3px solid var(--signal);
  line-height: 1.7;
}

@media (min-width: 64rem) {
  .study__inner {
    grid-template-columns: 5fr 7fr;
    gap: var(--space-l);
  }
}

/* ---------- Topics ---------- */
.topic-grid {
  display: grid;
  gap: var(--gap);
}

.topic-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 12rem;
  padding: var(--space-m);
  border: 1px solid var(--ink);
  transition: background var(--dur-fast), color var(--dur-fast);
}

.topic-tile:hover {
  background: var(--ink);
  color: var(--paper);
}

.topic-tile__name {
  font-family: var(--font-body);
  font-size: var(--fs-h2);
}

.topic-tile__desc {
  font-size: var(--fs-small);
  line-height: 1.75;
}

.topic-tile__count {
  margin-top: auto;
}

@media (min-width: 48rem) {
  .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 80rem) {
  .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page--topics .section-head__title {
  padding-bottom: var(--space-s);
  margin-bottom: var(--space-m);
  border-bottom: 1px solid var(--ink);
}

.category-row {
  display: grid;
  gap: var(--gap);
}

.category-row__link {
  display: flex;
  align-items: center;
  gap: var(--space-s);
  padding: var(--space-s);
  background: var(--paper-deep);
  text-decoration: none;
}

.category-row__link:hover {
  background: var(--ink);
  color: var(--paper);
}

.category-row__glyph {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
}

.category-row__name {
  flex: 1;
  font-weight: 700;
}

.category-row__count {
  font-size: var(--fs-meta);
  font-variant-numeric: tabular-nums;
}

@media (min-width: 48rem) {
  .category-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 80rem) {
  .category-row {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
}

.tag {
  font-size: var(--fs-lead);
  font-weight: var(--weight, 400);
  text-decoration: none;
}

.tag:hover {
  color: var(--signal);
  text-decoration: underline;
}

/* ---------- Authors ---------- */
.author-grid {
  display: grid;
  gap: var(--space-l) var(--gap);
}

@media (min-width: 48rem) {
  .author-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.profile {
  padding-bottom: var(--space-l);
  border-bottom: 1px solid var(--ink);
}

.profile__grid {
  display: grid;
  gap: var(--space-m);
  padding-top: var(--space-m);
}

.profile__photo {
  max-width: 20rem;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--paper-deep);
}

.profile__photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile__body {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.profile__name {
  font-family: var(--font-body);
  font-size: var(--fs-h1);
  letter-spacing: 0;
}

.profile__role {
  color: var(--graphite);
}

.profile__bio {
  max-width: var(--measure);
  line-height: var(--leading-body);
}

@media (min-width: 48rem) {
  .profile__grid {
    grid-template-columns: 20rem minmax(0, 1fr);
    gap: var(--space-l);
    align-items: end;
  }
}

/* ---------- About ---------- */
.about .prose {
  margin-inline: auto;
}

.prose--about h2 {
  font-size: var(--fs-h3);
}

/* ---------- Contact ---------- */
.contact {
  display: grid;
  gap: var(--space-l);
}

.contact .form {
  max-width: 40rem;
}

.contact__aside {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
  padding-top: var(--space-s);
  border-top: 1px solid var(--ink);
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--graphite);
}

@media (min-width: 64rem) {
  .contact {
    grid-template-columns: 7fr 4fr;
  }
}

/* ---------- Search ---------- */
.page--search .search-box {
  max-width: 44rem;
}

.search-results {
  display: flex;
  flex-direction: column;
  gap: var(--space-l);
}

.search-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-s);
}

.search-results mark {
  background: color-mix(in srgb, var(--signal) 18%, var(--paper));
  color: inherit;
}

/* ---------- 404 ---------- */
.page--404 {
  display: flex;
  flex-direction: column;
  gap: var(--space-m);
  padding-block: var(--space-l);
}

.nf__code {
  font-family: var(--font-display);
  font-size: clamp(7rem, 30vw, 22rem);
  font-weight: 900;
  font-variation-settings: 'wdth' 62;
  line-height: 0.8;
  letter-spacing: -0.04em;
}

.nf__title {
  font-family: var(--font-body);
  font-size: var(--fs-h2);
}

.nf__text {
  color: var(--graphite);
}

.nf__search {
  max-width: 36rem;
}

.nf__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  font-weight: 700;
}