:root {
  --paper: #ffffff;
  --ink: #111111;
  --muted: #777777;
  --line: #dddddd;
  --soft: #f7f7f5;
  --max: 900px;
  --serif: "Times New Roman", Times, Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.55;
}

::selection {
  background: #e8e8e8;
}

a {
  color: inherit;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* Header */
.site-header {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 28px 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 56px;
  height: 56px;
  flex: 0 0 auto;
}

.brand-copy {
  display: flex;
  flex-direction: column;
}

.brand-name {
  font-family: var(--sans);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: 0;
  color: var(--ink);
}

.brand-subtitle {
  margin-top: 3px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.2;
  letter-spacing: 0;
}

/* Hero */
.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 46px 28px 34px;
}

.hero h1,
.page-title {
  margin: 0;
  font-family: var(--serif);
  font-size: 50px;
  font-weight: 400;
  line-height: 1.1;
  font-variant: small-caps;
  letter-spacing: 0;
}

.slogan {
  margin: 14px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
}

/* Quick info */
.quick-info {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 38px;
}

.info-label {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 400;
}

.info-value {
  margin: 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
}

.info-value a:hover {
  color: var(--ink);
}

/* Manifesto box */
.manifesto {
  max-width: var(--max);
  margin: 0 auto 46px;
  padding: 32px 42px 34px;
  border: 1px solid var(--line);
  background: var(--soft);
}

.manifesto h2 {
  margin: 0 0 18px;
  text-align: center;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
  font-style: italic;
}

.manifesto p {
  max-width: 720px;
  margin: 0 auto;
  font-size: 19px;
  line-height: 1.5;
  text-align: center;
}

/* Copy / body text */
.copy,
.section,
.closing,
.post-body {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px;
}

.copy p,
.post-body p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.55;
}

.copy .lead {
  font-size: 18px;
}

/* Section headers */
.section {
  padding-top: 42px;
  padding-bottom: 20px;
}

.section-header {
  display: grid;
  grid-template-columns: 156px 1fr;
  gap: 32px;
  align-items: start;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.section h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 400;
  font-variant: small-caps;
  letter-spacing: 0;
}

.section-intro {
  margin: 0;
  color: #444;
  font-size: 17px;
  line-height: 1.5;
}

/* Research list */
.research-list {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 18px;
}

.research-item {
  display: grid;
  grid-template-columns: 156px 1fr;
  gap: 32px;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.research-item:last-child {
  border-bottom: 1px solid var(--line);
}

.research-kicker {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}

.research-item h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
}

.research-item p {
  margin: 0;
  color: #444;
  font-size: 16px;
  line-height: 1.5;
}

/* Blog post list */
.post-list {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 36px;
}

.post-link {
  display: grid;
  grid-template-columns: 150px 1fr 24px;
  gap: 28px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.post-link:last-child {
  border-bottom: 1px solid var(--line);
}

.post-link:hover {
  text-decoration: none;
}

.post-link:hover h3 {
  text-decoration: underline;
}

.post-meta {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.5;
}

.post-link h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
}

.post-link p {
  margin: 0;
  color: #444;
  font-size: 16px;
  line-height: 1.5;
}

.post-arrow {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 18px;
}

/* Closing */
.closing {
  padding-top: 34px;
  padding-bottom: 46px;
}

.closing p {
  margin: 0 0 18px;
  font-size: 17px;
  line-height: 1.55;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 14px;
}

.link-row a:hover {
  color: var(--ink);
}

/* Footer */
.site-footer {
  padding: 28px 28px 46px;
  color: var(--muted);
  text-align: center;
  font-size: 13px;
}

/* Page styles (blog index, posts) */
.page-main {
  padding-top: 38px;
}

.page-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 28px 38px;
}

.page-hero .slogan {
  margin-top: 12px;
}

.post-body {
  padding-bottom: 38px;
}

.post-body h2 {
  margin: 36px 0 12px;
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
  font-variant: small-caps;
  letter-spacing: 0;
}

.post-figure {
  margin: 0 0 24px;
}

.post-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line);
}

.post-figure figcaption {
  margin-top: 8px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}

.paper-links a:hover {
  color: var(--ink);
}

.post-note {
  max-width: var(--max);
  margin: 0 auto 28px;
  padding: 14px 28px 0;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.6;
}

.back-link {
  display: inline-block;
  margin: 0 0 20px;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 13px;
}

/* Responsive */
@media (max-width: 768px) {
  .site-header {
    padding-top: 28px;
  }

  .hero {
    padding-top: 34px;
    padding-bottom: 28px;
  }

  .hero h1,
  .page-title {
    font-size: 36px;
  }

  .quick-info,
  .section-header,
  .research-item,
  .post-link {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .quick-info {
    gap: 28px;
  }

  .manifesto {
    margin-left: 28px;
    margin-right: 28px;
    padding: 28px 24px 30px;
  }

  .manifesto p {
    font-size: 18px;
  }

  .copy p,
  .post-body p,
  .closing p {
    font-size: 17px;
  }

  .copy .lead {
    font-size: 18px;
  }

  .section {
    padding-top: 38px;
  }
}

@media (max-width: 480px) {
  body {
    font-size: 16px;
  }

  .brand-mark {
    width: 48px;
    height: 48px;
  }

  .hero h1,
  .page-title {
    font-size: 28px;
  }

  .slogan {
    font-size: 13px;
  }

  .site-header,
  .hero,
  .quick-info,
  .copy,
  .section,
  .research-list,
  .post-list,
  .closing,
  .post-body,
  .page-hero,
  .post-note {
    padding-left: 20px;
    padding-right: 20px;
  }

  .manifesto {
    margin-left: 20px;
    margin-right: 20px;
    padding: 28px 20px 32px;
  }

  .manifesto p {
    font-size: 17px;
  }

  .research-item h3,
  .post-link h3 {
    font-size: 18px;
  }
}