@font-face {
  font-family: 'Inter';
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
  src: url('../fonts/inter/inter-latin-variable.woff2') format('woff2');
}

@font-face {
  font-family: 'Space Grotesk';
  font-style: normal;
  font-weight: 300 700;
  font-display: swap;
  src: url('../fonts/space-grotesk/space-grotesk-latin-variable.woff2') format('woff2');
}

:root {
  --font-display: "Space Grotesk", "Inter", "Segoe UI", sans-serif;
  --font-sans: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-alt: #f1f5f9;
  --color-surface-soft: rgba(255, 255, 255, 0.72);
  --color-text-strong: #0f172a;
  --color-text-body: #1e293b;
  --color-text-muted: #64748b;
  --color-accent: #2563eb;
  --color-accent-strong: #1d4ed8;
  --color-highlight: #f97316;
  --color-border: #e2e8f0;
  --shadow-xs: 0 1px 1px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 12px 32px rgba(15, 23, 42, 0.12);
  --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.16);
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 24px;
  --transition-base: 200ms ease;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 40px;
  --space-8: 64px;
  --max-width: 1040px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text-body);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.08) 0%, rgba(248, 250, 252, 0) 45%);
}

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

figure {
  margin: 0;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-display);
  color: var(--color-text-strong);
  font-weight: 600;
}

h4 {
  font-size: 1.05rem;
  line-height: 1.3;
}

p {
  margin: 0;
}

ol,
ul {
  margin: 0;
  padding: 0;
}

main {
  display: flex;
  flex-direction: column;
  gap: clamp(24px, 6vw, 48px);
}

.section {
  padding: clamp(20px, 5vw, 40px) 0;
}

.section + .section {
  margin-top: 0;
}

.section--compact {
  padding: clamp(12px, 3.5vw, 20px) 0;
}

.section--compact + .section {
  margin-top: 0;
}

#publications {
  padding-bottom: clamp(12px, 3.5vw, 24px);
}

#contact {
  padding-top: clamp(8px, 3vw, 18px);
}

@supports not (gap: 1px) {
  main {
    gap: 0;
  }

  .section + .section {
    margin-top: clamp(20px, 5vw, 40px);
  }

  .section--compact + .section {
    margin-top: clamp(12px, 3.5vw, 20px);
  }
}

.section--hero {
  position: relative;
  padding-top: clamp(76px, 12vw, 104px);
  padding-bottom: clamp(32px, 7vw, 52px);
}

.section--surface {
  background: var(--color-surface);
}

.section--band {
  background: linear-gradient(180deg, rgba(15, 23, 42, 0.04) 0%, rgba(248, 250, 252, 0.9) 100%);
  padding-bottom: clamp(24px, 5vw, 36px);
}

.section__header {
  max-width: 720px;
  display: grid;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

.section__title {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
}

.section__intro {
  color: var(--color-text-muted);
}

.shell {
  width: min(var(--max-width), calc(100% - 2 * var(--space-6)));
  margin: 0 auto;
}

.eyebrow {
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-weight: 600;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.skip-link:focus {
  left: var(--space-6);
  top: var(--space-6);
  width: auto;
  height: auto;
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  color: #f8fafc;
  border-radius: var(--radius-sm);
  z-index: 200;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.95);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.site-header.is-condensed {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
  background: rgba(248, 250, 252, 0.88);
}

.scroll-progress {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: rgba(15, 23, 42, 0.08);
  overflow: hidden;
  border-top-left-radius: var(--radius-sm);
  border-top-right-radius: var(--radius-sm);
}

.scroll-progress__bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--color-accent) 0%, var(--color-accent-strong) 100%);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 120ms linear;
}

.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: var(--space-5);
}

.site-brand {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--color-text-strong);
  text-decoration: none;
}

.site-brand:focus-visible,
.site-nav__link:focus-visible,
.btn:focus-visible,
.nav-toggle:focus-visible,
.site-footer__top:focus-visible,
.publication__link:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.site-nav {
  display: flex;
}

.site-nav__list {
  list-style: none;
  display: flex;
  gap: var(--space-5);
  align-items: center;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding-bottom: 6px;
  font-size: 0.94rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--color-text-muted);
  transition: color var(--transition-base);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-accent);
  transform-origin: center;
  transform: scaleX(0);
  opacity: 0;
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.site-nav__link:hover,
.site-nav__link[aria-current="location"],
.site-nav__link.is-active {
  color: var(--color-accent);
}

.site-nav__link:hover::after,
.site-nav__link[aria-current="location"]::after,
.site-nav__link.is-active::after {
  transform: scaleX(1);
  opacity: 1;
}

.nav-toggle {
  border: none;
  background: var(--color-surface);
  border-radius: 999px;
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.nav-toggle[aria-expanded="true"] {
  box-shadow: var(--shadow-md);
}

.nav-toggle__bar {
  position: relative;
  width: 18px;
  height: 2px;
  background: var(--color-text-strong);
}

.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--color-text-strong);
  transition: transform var(--transition-base), opacity var(--transition-base);
}

.nav-toggle__bar::before {
  transform: translateY(-6px);
}

.nav-toggle__bar::after {
  transform: translateY(6px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before {
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after {
  transform: rotate(-45deg);
}

.hero {
  position: relative;
  display: grid;
  gap: clamp(24px, 5vw, 48px);
  align-items: start;
  z-index: 1;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(180px, 240px);
    align-items: start;
  }

  .hero__content {
    max-width: 64ch;
    padding-right: clamp(0px, 4vw, 56px);
  }

  .hero__media {
    justify-self: end;
  }
}

.hero__content {
  display: grid;
  gap: var(--space-4);
}

.hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  max-width: 14ch;
}

.hero__lede {
  font-size: clamp(1rem, 2vw, 1.08rem);
  color: var(--color-text-body);
  max-width: 62ch;
}

.hero__lede a {
  color: var(--color-accent);
  font-weight: 500;
}

.hero__media {
  position: relative;
  justify-self: center;
  max-width: clamp(180px, 22vw, 240px);
}

.hero__image {
  width: clamp(180px, 22vw, 240px);
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-sm);
  object-fit: cover;
  border: 1px solid rgba(226, 232, 240, 0.9);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0.65rem 1.6rem;
  font-weight: 600;
  font-size: 0.94rem;
  letter-spacing: 0.02em;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), color var(--transition-base);
  text-decoration: none;
}

.btn--primary {
  background: var(--color-accent);
  color: #f8fafc;
  box-shadow: var(--shadow-md);
}

.btn--primary:hover {
  background: var(--color-accent-strong);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn--secondary {
  background: rgba(37, 99, 235, 0.1);
  color: var(--color-accent-strong);
  border-color: rgba(37, 99, 235, 0.18);
  box-shadow: var(--shadow-xs);
}

.btn--secondary:hover {
  background: var(--color-accent);
  color: #f8fafc;
  border-color: transparent;
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  background: transparent;
  color: var(--color-text-strong);
  border-color: var(--color-border);
}

.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.publication-groups {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
}

.publication-group {
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-xs);
  display: grid;
  gap: var(--space-4);
  border: 1px solid rgba(226, 232, 240, 0.6);
}

.publication-group__title {
  font-size: clamp(1.4rem, 2.4vw, 1.8rem);
}

.publication-list {
  list-style: none;
  display: grid;
  gap: var(--space-4);
}

.publication {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  background: var(--color-surface-soft);
  border: 1px solid rgba(226, 232, 240, 0.7);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
}

.publication:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
  border-color: var(--color-accent);
}

.publication__details {
  display: grid;
  gap: var(--space-2);
}

.publication__authors {
  font-weight: 500;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.publication__meta {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.publication__meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  align-items: center;
}

.publication__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-highlight);
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(249, 115, 22, 0.12);
}

.publication__link {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  justify-self: flex-end;
  padding-inline: var(--space-2);
}

.publication__link::after {
  content: "→";
  font-size: 0.9em;
  transition: transform var(--transition-base);
}

.publication__link:hover::after {
  transform: translateX(4px);
}

.publication--highlight {
  border-color: rgba(249, 115, 22, 0.42);
  background: rgba(249, 115, 22, 0.08);
}

.card {
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(37, 99, 235, 0));
  padding: clamp(24px, 6vw, 36px);
  box-shadow: var(--shadow-md);
}

.card__content {
  display: grid;
  gap: var(--space-4);
}

.card__content > .btn {
  justify-self: start;
}

.card__title {
  font-size: clamp(1.8rem, 3vw, 2.2rem);
}

.card__text {
  color: var(--color-text-muted);
  max-width: 56ch;
}

.contact {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 6vw, 36px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  box-shadow: var(--shadow-sm);
}

.contact__content {
  display: grid;
  gap: var(--space-3);
  max-width: 480px;
}

.contact__title {
  font-size: clamp(1.8rem, 3vw, 2.1rem);
}

.contact__text {
  color: var(--color-text-muted);
}

.site-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-5) 0;
  background: rgba(15, 23, 42, 0.04);
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.site-footer__text {
  color: var(--color-text-muted);
  font-size: 0.88rem;
}

.site-footer__top {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: none;
}

a {
  color: var(--color-accent);
  text-decoration: none;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

@media (max-width: 1080px) {
  .publication-groups {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  }
}

@media (max-width: 900px) {
  .publication {
    grid-template-columns: 1fr;
  }

  .publication__link {
    justify-self: flex-start;
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    right: 0;
    top: calc(100% + var(--space-2));
    min-width: min(260px, calc(100vw - 2 * var(--space-6)));
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: var(--space-4);
    display: none;
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }

  .site-nav__link {
    font-size: 1rem;
    padding-bottom: 4px;
  }

  .hero {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .hero__content > .eyebrow {
    font-size: 0.74rem;
    letter-spacing: 0.14em;
    max-width: 24ch;
  }

  .hero__image {
    width: clamp(168px, 46vw, 220px);
  }

  .section__header {
    margin-bottom: var(--space-5);
  }

  .publication-group {
    padding: var(--space-4);
  }

  .publication {
    padding: var(--space-4);
  }

  .card__content > .btn {
    justify-self: stretch;
  }

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

  .section {
    padding: clamp(32px, 10vw, 56px) 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}