:root {
  --color-accent: #a72b22;
  --color-accent-dark: #7f1f19;
  --color-ink: #17191c;
  --color-charcoal: #24282d;
  --color-muted: #5b626a;
  --color-line: #d9dcdf;
  --color-soft: #f4f3f0;
  --color-paper: #fff;
  --font-sans: "IBM Plex Sans", system-ui, sans-serif;
  --font-serif: "IBM Plex Serif", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --space-1: 0.375rem;
  --space-2: 0.75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: 4.5rem;
  --space-8: 7rem;
  --content-width: 72rem;
  --article-width: 42rem;
  --radius: 0.2rem;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-paper);
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--color-ink);
  font-family: var(--font-sans);
  line-height: 1.12;
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.5rem, 7vw, 5.75rem);
  letter-spacing: -0.045em;
}

h2 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  letter-spacing: -0.025em;
}

h3 {
  font-size: clamp(1.2rem, 2vw, 1.45rem);
  letter-spacing: -0.012em;
}

p {
  margin-top: 0;
}

a {
  color: var(--color-accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--color-accent);
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: var(--space-3);
  left: var(--space-3);
  padding: var(--space-2) var(--space-3);
  color: var(--color-paper);
  background: var(--color-ink);
  font-family: var(--font-sans);
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.container {
  width: min(calc(100% - 3rem), var(--content-width));
  margin-inline: auto;
}

.container--narrow {
  max-width: 54rem;
}

.container--article {
  max-width: var(--article-width);
}

.eyebrow,
.post-meta,
.project-kind {
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  line-height: 1.4;
  text-transform: uppercase;
}

.site-header {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-paper);
}

.header-inner {
  min-height: 4.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.brand {
  flex: 0 0 auto;
}

.brand img {
  width: 11.5rem;
}

.site-nav {
  display: flex;
  min-width: 0;
  max-width: 100%;
  align-items: center;
  gap: clamp(0.9rem, 2.3vw, 2rem);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  white-space: nowrap;
}

.site-nav a {
  color: var(--color-charcoal);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--color-accent-dark);
}

.site-nav a[aria-current="page"] {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.45rem;
}

.site-nav .nav-newsletter {
  padding: 0.5rem 0.8rem;
  border: 1px solid var(--color-ink);
}

.hero {
  padding-block: clamp(5rem, 12vw, 9rem);
  border-bottom: 1px solid var(--color-line);
}

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

.hero h1 {
  max-width: 13ch;
  margin: var(--space-4) 0;
}

.hero-text {
  max-width: 36rem;
  margin-bottom: var(--space-3);
  color: var(--color-charcoal);
  font-size: clamp(1.3rem, 2.5vw, 1.75rem);
  line-height: 1.45;
}

.hero-attribution {
  max-width: 43rem;
  margin-bottom: 0;
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 0.95rem;
}

.button-group,
.inline-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-3) var(--space-5);
  margin-top: var(--space-5);
}

.button {
  display: inline-flex;
  min-height: 2.8rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.1rem;
  border: 1px solid var(--color-ink);
  border-radius: var(--radius);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

.button--primary {
  color: var(--color-paper);
  background: var(--color-ink);
}

.button--primary:hover {
  color: var(--color-paper);
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.button--secondary {
  color: var(--color-ink);
  background: transparent;
}

.button--secondary:hover {
  color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

.button--light {
  color: var(--color-ink);
  background: var(--color-paper);
  border-color: var(--color-paper);
}

.button--light:hover {
  color: var(--color-ink);
  background: var(--color-soft);
}

.text-link {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
}

.editorial-section,
.about-preview {
  padding-block: var(--space-8);
}

.section-heading {
  margin-bottom: var(--space-6);
}

.section-heading h2,
.section-heading .eyebrow {
  margin-bottom: 0;
}

.section-heading .eyebrow {
  margin-bottom: var(--space-2);
}

.section-heading--with-link {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-5);
}

.post-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-line);
}

.post-card h3 {
  margin: var(--space-3) 0;
}

.post-card h3 a,
.archive-item h3 a,
.research-item h3 a {
  color: var(--color-ink);
  text-decoration: none;
}

.post-card h3 a:hover,
.archive-item h3 a:hover,
.research-item h3 a:hover {
  color: var(--color-accent-dark);
  text-decoration: underline;
}

.post-excerpt,
.archive-item > p,
.research-item > p {
  color: var(--color-muted);
}

.post-card .text-link {
  margin-top: auto;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.post-category {
  color: var(--color-accent-dark);
}

.post-card--prominent {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(14rem, 0.65fr);
  gap: var(--space-3) var(--space-7);
  padding: var(--space-6) 0;
  border-bottom: 1px solid var(--color-line);
}

.post-card--prominent .post-meta,
.post-card--prominent h3 {
  grid-column: 1;
}

.post-card--prominent h3 {
  margin-bottom: 0;
  font-size: clamp(1.8rem, 4vw, 3.25rem);
}

.post-card--prominent .post-excerpt {
  grid-column: 2;
  grid-row: 1 / span 2;
  align-self: end;
  font-size: 1.1rem;
}

.post-card--prominent .text-link {
  grid-column: 2;
}

.insight-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6) var(--space-5);
}

.editorial-areas {
  background: var(--color-soft);
}

.area-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.area-card {
  padding: var(--space-5);
  border-right: 1px solid var(--color-line);
}

.area-card:first-child {
  padding-left: 0;
}

.area-card:last-child {
  padding-right: 0;
  border-right: 0;
}

.area-number {
  color: var(--color-accent-dark);
  font-family: var(--font-mono);
  font-size: 0.8rem;
}

.area-card h3 {
  margin: var(--space-6) 0 var(--space-3);
}

.area-card p {
  min-height: 6em;
  color: var(--color-muted);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 var(--space-6);
}

.project-grid--preview {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-5);
}

.project-card {
  display: flex;
  min-height: 19rem;
  flex-direction: column;
  align-items: flex-start;
  justify-content: space-between;
  padding: var(--space-5) 0;
  border-top: 2px solid var(--color-ink);
}

.project-card h3 {
  margin: var(--space-3) 0;
}

.project-card p:not(.project-kind) {
  color: var(--color-muted);
}

.about-preview {
  display: grid;
  grid-template-columns: minmax(10rem, 0.45fr) minmax(0, 1fr);
  gap: var(--space-3) var(--space-7);
  border-top: 1px solid var(--color-line);
}

.about-preview .eyebrow {
  grid-row: 1 / span 3;
}

.about-preview h2,
.about-preview > p:not(.eyebrow),
.about-preview .inline-links {
  grid-column: 2;
}

.about-preview > p:not(.eyebrow) {
  max-width: 46rem;
  font-size: 1.2rem;
}

.newsletter-wrap {
  padding-bottom: var(--space-8);
}

.newsletter-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--space-6);
  padding: var(--space-6);
  color: var(--color-paper);
  background: var(--color-ink);
}

.newsletter-section h2,
.newsletter-section .eyebrow {
  color: var(--color-paper);
}

.newsletter-section h2 {
  margin: var(--space-2) 0;
}

.newsletter-section p:last-child {
  margin-bottom: 0;
  color: #d7d9dc;
}

.page-wrapper {
  padding-block: var(--space-7) var(--space-8);
}

.page-header {
  max-width: 55rem;
  margin-bottom: var(--space-8);
}

.page-header h1 {
  margin: var(--space-3) 0 var(--space-4);
  font-size: clamp(2.5rem, 6vw, 4.7rem);
}

.page-header > p:last-child {
  max-width: 43rem;
  color: var(--color-muted);
  font-size: 1.25rem;
}

.archive-section {
  margin-bottom: var(--space-8);
}

.archive-list {
  border-bottom: 1px solid var(--color-line);
}

.archive-item {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr) minmax(14rem, 0.7fr);
  gap: var(--space-4) var(--space-5);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-line);
}

.archive-item h3,
.archive-item p {
  margin-bottom: 0;
}

.research-area {
  display: grid;
  grid-template-columns: minmax(14rem, 0.65fr) minmax(0, 1fr);
  gap: var(--space-7);
  padding-block: var(--space-7);
  border-top: 1px solid var(--color-line);
  scroll-margin-top: var(--space-5);
}

.research-area-intro > p:last-child {
  color: var(--color-muted);
}

.research-list {
  border-bottom: 1px solid var(--color-line);
}

.research-item {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-line);
}

.research-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.research-item h3 {
  margin: var(--space-2) 0;
}

.archive-link-row {
  margin-bottom: var(--space-8);
}

.about-content {
  margin-bottom: var(--space-8);
  font-size: 1.15rem;
}

.about-content h2 {
  margin-top: var(--space-7);
}

.post {
  padding-block: var(--space-7) var(--space-8);
}

.back-link {
  display: inline-block;
  margin-bottom: var(--space-5);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
}

.back-link::before {
  content: "← ";
}

.post-header {
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.post-header h1 {
  margin-bottom: var(--space-4);
  font-size: clamp(2.4rem, 6vw, 4.5rem);
}

.post-content {
  font-size: 1.1rem;
}

.post-content h2,
.post-content h3 {
  margin-top: 2.25em;
  margin-bottom: 0.7em;
}

.post-content h2 {
  font-size: clamp(1.7rem, 4vw, 2.25rem);
}

.post-content h3 {
  font-size: 1.35rem;
}

.post-content a {
  overflow-wrap: anywhere;
}

.post-content blockquote {
  margin: var(--space-5) 0;
  padding: var(--space-2) 0 var(--space-2) var(--space-5);
  border-left: 3px solid var(--color-accent-dark);
  color: var(--color-charcoal);
  font-size: 1.08em;
  font-style: italic;
}

.post-content table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
}

.post-content th,
.post-content td {
  padding: var(--space-2);
  border: 1px solid var(--color-line);
  text-align: left;
}

pre,
code {
  font-family: var(--font-mono);
}

code {
  padding: 0.12em 0.32em;
  border-radius: var(--radius);
  background: var(--color-soft);
  font-size: 0.88em;
}

pre,
.highlight {
  max-width: 100%;
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--color-soft);
}

pre {
  padding: var(--space-4);
  line-height: 1.55;
}

pre code,
.highlight code {
  padding: 0;
  background: transparent;
}

.embed-container,
.video-container {
  position: relative;
  height: 0;
  margin-block: var(--space-5);
  padding-bottom: 56.25%;
  overflow: hidden;
}

.embed-container iframe,
.video-container iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.post-footer {
  margin-top: var(--space-7);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-line);
  color: var(--color-muted);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.post-footer p {
  margin-bottom: var(--space-1);
}

.site-footer {
  padding-block: var(--space-7) var(--space-4);
  color: #d7d9dc;
  background: var(--color-charcoal);
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.8fr) 0.6fr 0.6fr;
  gap: var(--space-7);
}

.footer-brand {
  color: var(--color-paper);
  font-size: 1.25rem;
  font-weight: 700;
  text-decoration: none;
}

.footer-identity p {
  max-width: 36rem;
  margin-top: var(--space-3);
}

.footer-nav,
.footer-social {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}

.site-footer a {
  color: var(--color-paper);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid #555b62;
  font-size: 0.8rem;
}

.footer-bottom p {
  margin-bottom: 0;
}

@media (max-width: 56rem) {
  .header-inner {
    padding-block: var(--space-3);
    align-items: flex-start;
    flex-direction: column;
    gap: var(--space-3);
  }

  .site-nav {
    width: 100%;
    padding-bottom: var(--space-1);
    overflow-x: auto;
  }

  .post-card--prominent,
  .archive-item,
  .research-area,
  .about-preview {
    grid-template-columns: 1fr;
  }

  .post-card--prominent .post-meta,
  .post-card--prominent h3,
  .post-card--prominent .post-excerpt,
  .post-card--prominent .text-link,
  .about-preview .eyebrow,
  .about-preview h2,
  .about-preview > p:not(.eyebrow),
  .about-preview .inline-links {
    grid-column: 1;
    grid-row: auto;
  }

  .insight-grid,
  .area-grid,
  .project-grid--preview {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .area-card,
  .area-card:first-child,
  .area-card:last-child {
    padding: var(--space-5);
    border-right: 0;
    border-bottom: 1px solid var(--color-line);
  }

  .area-card:last-child {
    border-bottom: 0;
  }

  .area-card p {
    min-height: 0;
  }
}

@media (max-width: 40rem) {
  :root {
    --space-7: 3rem;
    --space-8: 4.5rem;
  }

  html {
    scroll-behavior: auto;
  }

  body {
    font-size: 1rem;
  }

  .container {
    width: min(calc(100% - 2rem), var(--content-width));
  }

  .brand img {
    width: 9.5rem;
  }

  .site-nav {
    gap: var(--space-4);
    font-size: 0.85rem;
  }

  .site-nav .nav-newsletter {
    padding: 0;
    border: 0;
  }

  .hero {
    padding-block: var(--space-7);
  }

  .button-group,
  .button-group .button {
    width: 100%;
  }

  .section-heading--with-link {
    align-items: flex-start;
    flex-direction: column;
  }

  .insight-grid,
  .area-grid,
  .project-grid,
  .project-grid--preview,
  .newsletter-section,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .project-card {
    min-height: 0;
  }

  .newsletter-section {
    padding: var(--space-5);
  }

  .newsletter-section .button {
    justify-self: start;
  }

  .footer-grid {
    gap: var(--space-5);
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}