:root {
  --color-background: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-muted: #f1f5f9;
  --color-text: #1e293b;
  --color-text-soft: #475569;
  --color-accent: #1d4f91;
  --color-accent-secondary: #2f6aa8;
  --color-border: #e2e8f0;
  --color-shadow: rgba(15, 23, 42, 0.06);
  --font-body: 'Atkinson Hyperlegible', 'Segoe UI', Arial, sans-serif;
  --font-heading: 'Crimson Pro', Georgia, 'Times New Roman', serif;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 5rem;
  --container-width: 66rem;
  --reading-width: 37rem;
  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --header-height: 4.5rem;
  --transition: 180ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 0;
  background: var(--color-background);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  text-underline-offset: 0.16em;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

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

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.24);
  outline-offset: 3px;
}

button {
  font: inherit;
}

p,
ul,
figure {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4.5rem);
}

h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: clamp(1.35rem, 2vw, 1.7rem);
}

body > header,
main,
body > footer {
  padding-inline: min(5vw, 2rem);
}

body > header > div,
#mobile-nav,
main > section,
body > footer {
  width: min(100%, var(--container-width));
  margin-inline: auto;
}

body > header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--color-background);
  border-bottom: 1px solid var(--color-border);
}

body > header > div {
  min-height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

body > header > div > a {
  color: var(--color-text);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

header nav[aria-label='Primary'] {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--space-4);
}

header nav[aria-label='Primary'] a,
#mobile-nav a {
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

header nav[aria-label='Primary'] a:hover,
header nav[aria-label='Primary'] a:focus-visible,
#mobile-nav a:hover,
#mobile-nav a:focus-visible {
  color: var(--color-accent);
}

[data-nav-toggle] {
  display: none;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
}

#mobile-nav {
  display: none;
}

#mobile-nav[hidden] {
  display: none;
}

#mobile-nav:not([hidden]) {
  margin-bottom: var(--space-4);
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

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

main > section {
  padding-block: var(--space-7);
  min-width: 0;
}

main > section:first-child {
  padding-top: var(--space-3);
}

main > section + section {
  border-top: 1px solid rgba(226, 232, 240, 0.8);
}

main > section > p,
main > section > header > p,
#about p,
#cv p,
#contact p,
#awards p {
  max-width: var(--reading-width);
  color: var(--color-text-soft);
}

main > section > header {
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

section[aria-labelledby='hero-title'] {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(16rem, 0.85fr);
  gap: var(--space-7);
  align-items: center;
}

section[aria-labelledby='hero-title'] > div {
  min-width: 0;
  display: grid;
  gap: var(--space-5);
}

section[aria-labelledby='hero-title'] > div > header {
  display: grid;
  gap: var(--space-3);
}

section[aria-labelledby='hero-title'] > div > header p:first-child {
  color: var(--color-accent);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

section[aria-labelledby='hero-title'] > div > header p:last-child {
  font-size: 1.1rem;
  color: var(--color-text-soft);
}

section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] a,
#cv a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.75rem 1.15rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  font-weight: 700;
}

section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] a:first-child,
#cv a {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] a:hover,
#cv a:hover {
  border-color: var(--color-accent-secondary);
  color: var(--color-accent-secondary);
}

section[aria-labelledby='hero-title'] figure {
  justify-self: end;
  width: min(100%, 22rem);
}

section[aria-labelledby='hero-title'] figure img {
  width: 100%;
  aspect-ratio: 1 / 1.08;
  object-fit: cover;
  border-radius: 1rem;
  border: 1px solid rgba(226, 232, 240, 0.95);
  background: var(--color-surface-muted);
  box-shadow: 0 8px 18px rgba(15, 23, 42, 0.05);
}

#research ul {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

#research li {
  padding: 0.65rem 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-soft);
  font-weight: 700;
}

#publications > div {
  display: grid;
  gap: var(--space-5);
}

#publications article,
#awards,
#cv,
#contact {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

#publications article {
  display: grid;
  grid-template-columns: minmax(15rem, 18rem) minmax(0, 1fr);
  gap: var(--space-5);
  padding: var(--space-5);
  align-items: stretch;
}

#publications article:hover {
  border-color: #d6dee9;
}

#publications figure {
  min-width: 0;
}

#publications figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-muted);
}

#publications article > div {
  min-width: 0;
  display: grid;
  gap: var(--space-3);
  align-content: start;
}

#publications article header {
  display: grid;
  gap: var(--space-2);
}

#publications article header p {
  color: var(--color-text-soft);
}

#publications article > div > p {
  color: var(--color-text-soft);
}

#awards,
#cv,
#contact {
  padding: var(--space-6);
}

#awards {
  display: grid;
  gap: var(--space-4);
}

#awards img {
  width: min(100%, 28rem);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface-muted);
}

#cv {
  display: grid;
  gap: var(--space-4);
}

#cv p:last-child {
  max-width: none;
}

#contact {
  display: grid;
  gap: var(--space-3);
}

body > footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-5) var(--space-7);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-soft);
  font-size: 0.95rem;
}

@media (max-width: 64rem) {
  section[aria-labelledby='hero-title'] {
    grid-template-columns: minmax(0, 1fr);
  }

  section[aria-labelledby='hero-title'] figure {
    justify-self: start;
  }

  #publications article {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 48rem) {
  body > header > div {
    flex-wrap: nowrap;
  }

  header nav[aria-label='Primary'] {
    display: none;
  }

  [data-nav-toggle] {
    display: inline-flex;
  }

  #mobile-nav:not([hidden]) {
    display: grid;
    gap: var(--space-3);
  }

  main {
    padding-block: var(--space-6) var(--space-7);
  }

  main > section {
    padding-block: var(--space-6);
  }

  #awards,
  #cv,
  #contact,
  #publications article {
    padding: var(--space-5);
  }
}

@media (max-width: 30rem) {
  body > header,
  main,
  body > footer {
    padding-inline: 1rem;
  }

  section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] {
    flex-direction: column;
  }

  section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] a,
  #cv a,
  [data-nav-toggle] {
    width: 100%;
  }

  body > footer {
    flex-direction: column;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  #publications article:hover,
  section[aria-labelledby='hero-title'] nav[aria-label='Primary links'] a:hover,
  #cv a:hover {
    transform: none;
    box-shadow: none;
  }
}