:root {
  --background: #fbfcfd;
  --surface: #f3f6f8;
  --text: #111827;
  --muted: #5d6876;
  --quiet: #667180;
  --line: #dfe4e9;
  --accent: #1d5fd1;
  --accent-dark: #174ba4;
  --accent-soft: #eaf1ff;
  --shell: 70rem;
  --reading: 44rem;
  --radius: 0.875rem;
}

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

html {
  color-scheme: light;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

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

a:focus-visible {
  border-radius: 0.2rem;
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

h1,
h2,
h3,
p,
figure {
  margin-top: 0;
}

h1,
h2,
h3 {
  letter-spacing: -0.035em;
  line-height: 1.08;
}

h1 {
  max-width: 14ch;
  margin-bottom: 1.5rem;
  font-size: clamp(2.85rem, 5.6vw, 4.75rem);
  font-weight: 650;
}

h2 {
  margin-bottom: 1.25rem;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 640;
}

h3 {
  margin-bottom: 0.8rem;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
  font-weight: 630;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  top: 1rem;
  left: 1rem;
  padding: 0.7rem 1rem;
  transform: translateY(-200%);
  border-radius: 0.5rem;
  background: var(--text);
  color: white;
}

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

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 5.5rem;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  line-height: 0;
}

.wordmark img {
  width: clamp(2.75rem, 5vw + 1.75rem, 3.75rem);
  height: clamp(2.75rem, 5vw + 1.75rem, 3.75rem);
  border-radius: 0.4rem;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 3vw, 2rem);
}

nav a {
  color: var(--muted);
  font-size: 0.94rem;
  font-weight: 560;
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(17rem, 0.65fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: center;
  min-height: calc(100svh - 5.5rem);
  padding-block: clamp(5rem, 10vw, 8rem);
}

.eyebrow,
.section-label p,
.project-type {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 720;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.eyebrow {
  margin-bottom: 1.2rem;
}

.hero-intro {
  max-width: 38rem;
  margin-bottom: 2rem;
  color: var(--muted);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  line-height: 1.55;
}

.profile-links,
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}

.profile-links a,
.footer-links a,
.text-link {
  color: var(--text);
  font-weight: 620;
}

.portrait {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
  margin: 0;
  border-radius: var(--radius);
  background: var(--surface);
}

.portrait::after {
  position: absolute;
  inset: 0;
  border: 1px solid rgb(17 24 39 / 10%);
  border-radius: inherit;
  content: "";
  pointer-events: none;
}

.portrait img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 61%;
}

.section {
  display: grid;
  grid-template-columns: minmax(8rem, 0.35fr) minmax(0, 1.65fr);
  gap: clamp(2rem, 8vw, 8rem);
  padding-block: clamp(5rem, 9vw, 8rem);
  border-top: 1px solid var(--line);
}

.section-label p {
  position: sticky;
  top: 2rem;
  margin: 0;
  color: var(--quiet);
}

.section-content {
  min-width: 0;
}

.prose {
  max-width: var(--reading);
}

.prose > p,
.section-heading > p,
.item > p,
.featured-project p,
.post-preview > p:last-child,
.article-body p {
  color: var(--muted);
}

.prose > p {
  margin-bottom: 1.35rem;
  font-size: 1.13rem;
}

.aside-note {
  margin-top: 2rem;
  padding-left: 1rem;
  border-left: 3px solid var(--accent);
  color: var(--text) !important;
  font-weight: 560;
}

.section-heading {
  max-width: 44rem;
  margin-bottom: 2.5rem;
}

.section-heading > p {
  max-width: 39rem;
  margin-bottom: 0;
  font-size: 1.08rem;
}

.section-heading-inline {
  max-width: none;
}

.section-heading-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
}

.section-heading-title h2 {
  margin-bottom: 1.25rem;
}

.item-list,
.post-list {
  border-top: 1px solid var(--line);
}

.item {
  padding-block: 2.25rem;
  border-bottom: 1px solid var(--line);
}

#research.section {
  border-top: 0;
}

#research .item-list {
  border-top: 0;
}

#research .item {
  border-bottom: 0;
}

#research .item + .item {
  border-top: 1px solid var(--line);
}

#writing.section {
  border-top: 0;
}

#writing .post-list {
  border-top: 0;
}

#writing .post-preview {
  border-bottom: 0;
}

#writing .post-preview + .post-preview {
  border-top: 1px solid var(--line);
}

#writing .post-preview:last-child .item-links {
  margin-top: 4.5rem;
}

#writing .post-preview:last-child .item-links .text-link {
  margin-top: 0;
}

.item-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  color: var(--quiet);
  font-size: 0.78rem;
  font-weight: 680;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.item-meta span + span::before {
  margin-right: 1rem;
  content: "·";
}

.item h3 {
  max-width: 40rem;
}

.item > p {
  max-width: 43rem;
}

.text-link {
  display: inline-block;
  margin-top: 0.4rem;
}

.item-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
}

.featured-project {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.featured-project p:last-child {
  max-width: 38rem;
  margin-bottom: 0;
}

.project-type {
  margin-bottom: 0.8rem;
}

.button-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border-radius: 0.55rem;
  background: var(--text);
  color: white;
  font-size: 0.9rem;
  font-weight: 650;
  text-decoration: none;
}

.button-link:hover {
  background: var(--accent-dark);
  color: white;
}

.post-preview {
  padding-block: 2rem;
  border-bottom: 1px solid var(--line);
}

.post-preview h2,
.post-preview h3 {
  margin-bottom: 0.5rem;
  font-size: clamp(1.35rem, 2.2vw, 1.75rem);
}

.post-preview h2 a,
.post-preview h3 a {
  text-decoration: none;
}

.post-preview > p:last-child {
  margin-bottom: 0;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 7.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

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

.footer-links a {
  color: var(--muted);
}

/* Blog pages */
.page-header {
  padding-block: clamp(6rem, 12vw, 9rem) clamp(3.5rem, 7vw, 6rem);
}

.page-header h1 {
  max-width: 14ch;
}

.page-intro {
  max-width: 40rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.blog-list {
  padding-block: clamp(2.5rem, 5vw, 4rem) clamp(3rem, 7vw, 6rem);
}

.article-header,
.article-body,
.article-footer {
  width: min(calc(100% - 3rem), 46rem);
  margin-inline: auto;
}

.article-header {
  padding-block: clamp(5rem, 10vw, 8rem) clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.article-header h1 {
  max-width: 15ch;
}

.article-dek {
  max-width: 38rem;
  margin-bottom: 1.5rem;
  color: var(--muted);
  font-size: 1.2rem;
}

.article-body {
  padding-block: clamp(3rem, 7vw, 5rem);
}

.article-body p {
  margin-bottom: 1.5rem;
  font-size: 1.12rem;
}

.article-body .placeholder-copy {
  padding: 1.25rem;
  border-left: 3px solid var(--accent);
  background: var(--surface);
  color: var(--text);
}

.article-footer {
  padding-bottom: 5rem;
}

.error-page {
  display: grid;
  place-items: center;
  min-height: calc(100svh - 13rem);
  text-align: center;
}

.error-page h1 {
  max-width: none;
  margin-bottom: 1rem;
}

@media (max-width: 48rem) {
  .shell,
  .article-header,
  .article-body,
  .article-footer {
    width: min(calc(100% - 2rem), var(--shell));
  }

  .site-header {
    align-items: center;
    min-height: auto;
    padding-block: 1.25rem;
  }

  nav {
    gap: 0.9rem;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 3rem;
    min-height: auto;
    padding-block: 4.5rem;
  }

  .portrait {
    width: min(100%, 27rem);
    aspect-ratio: 4 / 4.7;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-block: 4.5rem;
  }

  .section-label p {
    position: static;
  }

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

  .featured-project {
    grid-template-columns: 1fr;
  }

  .button-link {
    justify-self: start;
  }

  .site-footer {
    display: flex;
    gap: 1rem;
    justify-content: center;
    padding-block: 2rem;
  }
}

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