@font-face {
  font-family: "Nebula Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("/fonts/NebulaSans-Book.woff2") format("woff2");
}

@font-face {
  font-family: "Nebula Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("/fonts/NebulaSans-Semibold.woff2") format("woff2");
}

@font-face {
  font-family: "Nebula Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("/fonts/NebulaSans-Bold.woff2") format("woff2");
}

:root {
  --background: #f7f8fc;
  --surface: #ffffff;
  --surface-soft: #eef3ff;
  --text: #151922;
  --muted: #626b7a;
  --line: #dfe3eb;
  --accent: #3157d5;
  --accent-dark: #2544ae;
  --accent-soft: #dfe7ff;
  --shadow: 0 24px 70px rgba(23, 34, 70, 0.12);
  --radius: 1.5rem;
  --container: 70rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background:
    radial-gradient(circle at 85% 6%, rgba(49, 87, 213, 0.1), transparent 26rem),
    var(--background);
  font-family: "Nebula Sans", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1rem;
  line-height: 1.65;
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-color: rgba(49, 87, 213, 0.45);
  text-underline-offset: 0.2em;
}

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

a:focus-visible {
  outline: 3px solid rgba(49, 87, 213, 0.35);
  outline-offset: 4px;
  border-radius: 0.25rem;
}

img,
svg {
  display: block;
}

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

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 100;
  padding: 0.65rem 0.9rem;
  color: #fff;
  background: var(--accent);
  border-radius: 0.5rem;
  transform: translateY(-150%);
}

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  border-bottom: 1px solid rgba(223, 227, 235, 0.75);
  background: rgba(247, 248, 252, 0.82);
  backdrop-filter: blur(18px) saturate(150%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 3rem), var(--container));
  min-height: 4.25rem;
  margin-inline: auto;
  gap: 2rem;
}

.brand {
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

nav {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav a {
  color: #444d5c;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
}

nav .contact-link {
  padding: 0.55rem 0.9rem;
  color: var(--accent);
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(17rem, 0.72fr);
  align-items: center;
  gap: clamp(2.5rem, 6vw, 5rem);
  min-height: 40rem;
  padding-top: 7.5rem;
  padding-bottom: 4rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.08;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 15ch;
  margin-bottom: 1.35rem;
  font-size: clamp(2.9rem, 4.8vw, 4.2rem);
  font-weight: 700;
  line-height: 0.98;
  letter-spacing: -0.035em;
}

h2 {
  max-width: 16ch;
  margin-bottom: 0;
  font-size: clamp(2rem, 2.5vw, 2.25rem);
  font-weight: 700;
}

.heading-line {
  white-space: nowrap;
}

h3 {
  font-size: 1.15rem;
}

.hero-intro {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.03rem, 1.6vw, 1.18rem);
  line-height: 1.6;
}

.hero-intro strong {
  color: var(--text);
}

.hero-intro a,
.about-copy a {
  color: var(--text);
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 3rem;
  padding: 0.65rem 1.1rem;
  border: 1px solid transparent;
  border-radius: 0.75rem;
  font-size: 0.91rem;
  font-weight: 700;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 10px 24px rgba(49, 87, 213, 0.22);
}

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

.button-secondary {
  color: var(--text);
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1.35rem;
  margin: 1.7rem 0 0;
  padding: 0;
  color: var(--muted);
  list-style: none;
}

.hero-meta li {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.86rem;
}

.hero-meta svg {
  width: 1rem;
  height: 1rem;
  fill: currentColor;
}

.hero-meta a {
  text-decoration: none;
}

.portrait-wrap {
  position: relative;
  aspect-ratio: 4 / 5;
  margin: 0;
}

.portrait-wrap::before {
  position: absolute;
  inset: 8% -8% -6% 10%;
  z-index: -1;
  content: "";
  background: var(--accent-soft);
  border-radius: 2rem;
  transform: rotate(4deg);
}

.portrait {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 30%;
  border: 0.65rem solid var(--surface);
  border-radius: 2rem;
  box-shadow: var(--shadow);
}

.section {
  display: grid;
  grid-template-columns: minmax(21rem, 0.9fr) minmax(0, 1.25fr);
  gap: clamp(2.5rem, 5vw, 4rem);
  padding-top: clamp(3.5rem, 6vw, 5rem);
  padding-bottom: clamp(3.5rem, 6vw, 5rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: 5rem;
}

.about-copy {
  max-width: 43rem;
  color: var(--muted);
  font-size: clamp(1.03rem, 1.5vw, 1.15rem);
}

.about-copy p {
  margin: 0 0 1.25rem;
}

.research-grid {
  display: grid;
}

.research-grid article {
  display: grid;
  grid-template-columns: 3.2rem minmax(9rem, 0.55fr) minmax(0, 1fr);
  align-items: baseline;
  gap: 1.2rem;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.research-grid article:first-child {
  padding-top: 0;
}

.card-number,
.publication-year,
.publication-venue {
  color: var(--accent);
  font-size: 0.73rem;
  font-weight: 700;
  letter-spacing: 0.09em;
  text-transform: uppercase;
}

.research-grid h3,
.research-grid p {
  margin: 0;
}

.research-grid p {
  color: var(--muted);
}

.tools-list h3 a {
  color: var(--text);
  text-decoration: none;
}

.tools-list h3 a:hover {
  color: var(--accent);
}

.publications {
  display: block;
}

.publications-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.25rem;
}

.text-link {
  flex: none;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

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

.publication {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr) auto;
  gap: 1.5rem;
  padding: 1.55rem 0;
  border-bottom: 1px solid var(--line);
}

.publication-venue {
  margin: 0 0 0.35rem;
}

.publication h3 {
  max-width: 44rem;
  margin-bottom: 0.5rem;
  font-size: clamp(1.18rem, 1.8vw, 1.4rem);
}

.publication-authors {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.publication-authors strong {
  color: var(--text);
  font-weight: 700;
}

.publication-links {
  display: flex;
  align-items: start;
  gap: 0.45rem;
}

.publication-links a {
  padding: 0.4rem 0.65rem;
  color: #4d5665;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.58);
  font-size: 0.76rem;
  font-weight: 700;
  text-decoration: none;
}

.publication-links a:hover {
  color: var(--accent);
  border-color: var(--accent-soft);
  background: var(--surface-soft);
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  min-height: 5rem;
  color: var(--muted);
  font-size: 0.84rem;
}

.footer-inner p {
  margin: 0;
}

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

.footer-links a {
  text-decoration: none;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) minmax(15rem, 0.55fr);
    gap: 3rem;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 2.25rem;
  }

  .section-heading h2 {
    max-width: 17ch;
  }

  .publication {
    grid-template-columns: 4rem minmax(0, 1fr);
  }

  .publication-links {
    grid-column: 2;
  }
}

@media (max-width: 720px) {
  .container,
  .header-inner {
    width: min(calc(100% - 2rem), var(--container));
  }

  .header-inner {
    min-height: 3.75rem;
  }

  nav {
    gap: 1rem;
  }

  nav a[href="#about"],
  nav a[href="#research"] {
    display: none;
  }

  nav .contact-link {
    padding: 0.45rem 0.75rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 6.75rem;
    padding-bottom: 3.5rem;
  }

  h1 {
    font-size: clamp(2.8rem, 12vw, 3.8rem);
  }

  .portrait-wrap {
    width: min(72vw, 19rem);
    margin: 0.5rem auto 0;
  }

  .research-grid article {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .research-grid p {
    grid-column: 2;
  }

  .publications-heading {
    display: block;
  }

  .publications-heading .text-link {
    display: inline-block;
    margin-top: 0.9rem;
  }

  .publication {
    grid-template-columns: 1fr;
    gap: 0.8rem;
    padding: 1.3rem 0;
  }

  .publication-links {
    grid-column: auto;
    margin-top: 0.25rem;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0.5rem;
  }
}

@media (max-width: 350px) {
  nav a[href="#tools"] {
    display: none;
  }
}

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

  .button {
    transition: none;
  }
}