:root {
  --bg: #f7f8f3;
  --surface: #ffffff;
  --surface-soft: #eef3ef;
  --ink: #111713;
  --muted: #5d685f;
  --line: #d9e1da;
  --green: #0f6b57;
  --green-dark: #093f35;
  --coral: #c84f3f;
  --gold: #d7a13b;
  --blue: #315f88;
  --white: #ffffff;
  --shadow: 0 12px 28px rgba(20, 32, 24, 0.10);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: auto;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgba(15, 107, 87, 0.10), transparent 34rem),
    linear-gradient(180deg, #fbfcf8 0%, var(--bg) 42%, #f0f4ee 100%);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

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

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

button {
  font: inherit;
}

.skip-link {
  background: var(--ink);
  color: var(--white);
  left: 1rem;
  padding: 0.65rem 0.85rem;
  position: fixed;
  top: 1rem;
  transform: translateY(-150%);
  z-index: 30;
}

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

.site-header {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  left: 0;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  position: fixed;
  right: 0;
  top: 0;
  transition: none;
  z-index: 20;
}

.site-header.is-scrolled,
.site-header.is-open {
  background: rgba(247, 248, 243, 0.92);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 8px 22px rgba(22, 30, 24, 0.08);
}

.brand {
  align-items: center;
  display: inline-flex;
  gap: 0.7rem;
  font-weight: 850;
  text-decoration: none;
}

.brand-mark {
  align-items: center;
  aspect-ratio: 1;
  background: var(--ink);
  border-radius: 8px;
  color: var(--white);
  display: inline-flex;
  font-size: 0.9rem;
  justify-content: center;
  width: 2.4rem;
}

.site-nav {
  align-items: center;
  background: rgba(255, 255, 255, 0.74);
  border: 1px solid var(--line);
  border-radius: 999px;
  display: flex;
  gap: 0.15rem;
  padding: 0.25rem;
}

.site-nav a {
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 780;
  padding: 0.52rem 0.75rem;
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  background: var(--ink);
  color: var(--white);
}

.nav-toggle {
  align-items: center;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: none;
  height: 2.7rem;
  justify-content: center;
  padding: 0;
  position: relative;
  width: 2.7rem;
}

.nav-toggle span {
  background: var(--ink);
  display: block;
  height: 2px;
  position: absolute;
  transition: none;
  width: 1.1rem;
}

.nav-toggle span:first-child {
  transform: translateY(-4px);
}

.nav-toggle span:last-child {
  transform: translateY(4px);
}

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

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

.hero {
  min-height: 100svh;
  padding: clamp(7rem, 12vh, 9rem) clamp(1rem, 4vw, 3rem) clamp(2rem, 6vh, 4rem);
}

.hero-inner,
.section,
.contact-inner,
.site-footer {
  margin: 0 auto;
  max-width: var(--max);
}

.hero-inner {
  align-items: center;
  display: grid;
  gap: clamp(2rem, 6vw, 6rem);
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.7fr);
}

.eyebrow,
.section-kicker,
.panel-label,
.venue,
.app-meta,
.demo-source {
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0;
  margin: 0 0 0.85rem;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(3.5rem, 8.4vw, 7.8rem);
  letter-spacing: 0;
  line-height: 0.9;
  margin-bottom: 1.35rem;
  max-width: 9.5ch;
}

.hero-lede {
  color: #2f3a33;
  font-size: clamp(1.15rem, 1.8vw, 1.45rem);
  line-height: 1.45;
  margin-bottom: 2rem;
  max-width: 720px;
}

.hero-actions,
.publication-tools,
.contact-card {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.button,
.filter-button,
.text-link,
.contact-card a {
  align-items: center;
  border: 1px solid var(--ink);
  border-radius: 8px;
  display: inline-flex;
  font-weight: 850;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.68rem 0.9rem;
  text-decoration: none;
}

.button.primary,
.filter-button.is-active {
  background: var(--ink);
  color: var(--white);
}

.button:hover,
.button:focus-visible,
.filter-button:hover,
.filter-button:focus-visible,
.text-link:hover,
.text-link:focus-visible {
  background: var(--green);
  border-color: var(--green);
  color: var(--white);
}

.profile-panel {
  position: relative;
}

.profile-panel::before {
  background: var(--coral);
  border-radius: 8px;
  content: "";
  height: 44%;
  left: -1.1rem;
  position: absolute;
  top: 2.5rem;
  width: 42%;
  z-index: 0;
}

.profile-panel::after {
  background: var(--gold);
  border-radius: 8px;
  bottom: 2.1rem;
  content: "";
  height: 34%;
  position: absolute;
  right: -1rem;
  width: 35%;
  z-index: 0;
}

.portrait-wrap {
  background: #eef3ef;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
  z-index: 1;
}

.portrait-wrap img {
  aspect-ratio: 1;
  filter: saturate(0.96) contrast(1.04);
  height: auto;
  object-fit: contain;
  width: 100%;
}

.profile-card {
  align-items: end;
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr auto;
  margin: -3rem 1rem 0;
  padding: 1.1rem;
  position: relative;
  z-index: 2;
}

.profile-card h2 {
  font-size: 1.55rem;
  line-height: 1.1;
  margin-bottom: 0.35rem;
}

.profile-card p:last-child {
  color: var(--muted);
  margin-bottom: 0;
}

.signal {
  align-items: end;
  display: grid;
  gap: 0.22rem;
  grid-template-columns: repeat(9, 0.32rem);
  height: 4rem;
}

.signal span {
  background: var(--green);
  border-radius: 999px;
  min-height: 0.45rem;
}

.signal span:nth-child(1),
.signal span:nth-child(9) { height: 28%; }
.signal span:nth-child(2),
.signal span:nth-child(8) { height: 54%; background: var(--blue); }
.signal span:nth-child(3),
.signal span:nth-child(7) { height: 76%; }
.signal span:nth-child(4),
.signal span:nth-child(6) { height: 46%; background: var(--coral); }
.signal span:nth-child(5) { height: 96%; background: var(--gold); }

.hero-metrics {
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: clamp(3rem, 8vh, 5rem) auto 0;
  max-width: var(--max);
  overflow: hidden;
}

.hero-metrics div {
  background: rgba(255, 255, 255, 0.72);
  padding: 1rem;
}

.hero-metrics div + div {
  border-left: 1px solid var(--line);
}

.hero-metrics span {
  color: var(--muted);
  display: block;
  font-size: 0.82rem;
  font-weight: 760;
  margin-bottom: 0.35rem;
}

.hero-metrics strong {
  display: block;
  font-size: clamp(1.05rem, 1.8vw, 1.45rem);
  line-height: 1.1;
}

.section {
  padding: clamp(4rem, 8vw, 7rem) clamp(1rem, 4vw, 3rem);
}

.overview-grid,
.section-header,
.contact-inner {
  display: grid;
  gap: clamp(1.5rem, 5vw, 4rem);
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
}

.overview-grid h2,
.section-header h2,
.contact-inner h2 {
  font-size: clamp(2.1rem, 5vw, 4.9rem);
  letter-spacing: 0;
  line-height: 0.98;
  margin-bottom: 0;
}

.overview-copy,
.section-header > p {
  color: #303a33;
  font-size: clamp(1rem, 1.3vw, 1.15rem);
}

.overview-copy p:last-child,
.section-header > p {
  margin-bottom: 0;
}

.research-grid,
.app-grid,
.demo-grid,
.skills-grid {
  display: grid;
  gap: 1rem;
}

.research-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 1.4rem;
}

.research-grid article,
.app-card,
.demo-card,
.skills-grid section {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 22px rgba(23, 33, 26, 0.07);
  padding: 1.25rem;
}

.research-grid article span {
  color: var(--coral);
  display: block;
  font-size: 0.85rem;
  font-weight: 950;
  margin-bottom: 2.4rem;
}

.research-grid article:nth-child(2) span { color: var(--green); }
.research-grid article:nth-child(3) span { color: var(--gold); }
.research-grid article:nth-child(4) span { color: var(--blue); }

.research-grid h3,
.app-card h3,
.demo-card h3,
.skills-grid h3,
.publication-item h3 {
  font-size: 1.1rem;
  line-height: 1.22;
  margin-bottom: 0.65rem;
}

.research-grid p,
.app-card p,
.demo-card p,
.publication-item p,
.skills-grid li {
  color: var(--muted);
}

.publications-section {
  max-width: none;
  padding-left: 0;
  padding-right: 0;
}

.publications-section > * {
  margin-left: auto;
  margin-right: auto;
  max-width: var(--max);
  padding-left: clamp(1rem, 4vw, 3rem);
  padding-right: clamp(1rem, 4vw, 3rem);
}

.filter-button {
  background: transparent;
  cursor: pointer;
}

.publication-list {
  display: grid;
  gap: 0.8rem;
  margin-top: 1.6rem;
}

.publication-item {
  align-items: start;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: grid;
  gap: 1rem;
  grid-template-columns: 5rem 1fr;
  padding: 1.1rem;
}

.publication-item.featured {
  background: var(--green-dark);
  border-color: var(--green-dark);
  color: var(--white);
}

.publication-item.featured p,
.publication-item.featured .venue {
  color: rgba(255, 255, 255, 0.76);
}

.publication-item[hidden] {
  display: none;
}

.publication-item time {
  color: var(--coral);
  font-weight: 950;
}

.publication-item.featured time {
  color: #f4cf6a;
}

.venue {
  margin-bottom: 0.25rem;
}

.publication-item h3 {
  margin-bottom: 0.25rem;
}

.text-link {
  border-color: var(--green);
  color: var(--green);
  margin-top: 1rem;
  width: fit-content;
}

.apps-section {
  border-top: 1px solid var(--line);
}

.app-grid {
  grid-template-columns: 1.15fr repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.app-card {
  min-height: 250px;
  overflow: hidden;
  position: relative;
}

.app-card::before {
  background: var(--green);
  content: "";
  height: 0.35rem;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.app-card:nth-child(2)::before {
  background: var(--blue);
}

.app-card:nth-child(3)::before {
  background: var(--gold);
}

.app-card.primary {
  background: var(--green-dark);
  border-color: var(--green-dark);
  color: var(--white);
}

.app-card.primary p,
.app-card.primary .app-meta {
  color: rgba(255, 255, 255, 0.76);
}

.app-card h3 {
  font-size: clamp(1.45rem, 2.4vw, 2.2rem);
  margin-bottom: 1rem;
}

.app-card p:last-child {
  margin-bottom: 0;
}

.demos-section {
  padding-top: 0;
}

.demo-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.demo-card {
  display: flex;
  flex-direction: column;
  min-height: 240px;
}

.demo-card h3 {
  font-size: clamp(1.25rem, 2vw, 1.65rem);
}

.demo-player {
  background: var(--ink);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 1.25rem;
  overflow: hidden;
}

.demo-player iframe {
  aspect-ratio: 16 / 9;
  border: 0;
  display: block;
  height: auto;
  width: 100%;
}

.demo-cite {
  font-size: 0.84rem;
  line-height: 1.5;
}

.demo-card a {
  align-items: center;
  border: 1px solid var(--green);
  border-radius: 8px;
  color: var(--green);
  display: inline-flex;
  font-weight: 850;
  justify-content: center;
  margin-top: auto;
  min-height: 2.75rem;
  padding: 0.68rem 0.9rem;
  text-decoration: none;
  width: fit-content;
}

.demo-card a:hover,
.demo-card a:focus-visible {
  background: var(--green);
  color: var(--white);
}


.skills-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1.5rem;
}

.skills-grid ul {
  display: grid;
  gap: 0.65rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.skills-grid li {
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.55rem;
}

.skills-grid li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.contact-section {
  background: var(--green);
  color: var(--white);
  padding: clamp(4rem, 9vw, 6rem) clamp(1rem, 4vw, 3rem);
}

.contact-section .section-kicker {
  color: #f7d56f;
}

.contact-card {
  align-content: start;
}

.contact-card a {
  border-color: rgba(255, 255, 255, 0.64);
  color: var(--white);
}

.contact-card a:hover,
.contact-card a:focus-visible {
  background: var(--white);
  color: var(--green);
}

.site-footer {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding: 1.4rem clamp(1rem, 4vw, 3rem);
}

.site-footer p {
  color: var(--muted);
  margin: 0;
}

.site-footer a {
  font-weight: 850;
}

.reveal {
  opacity: 1;
  transform: none;
}

@media (max-width: 1060px) {
  .hero-inner,
  .overview-grid,
  .section-header,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .profile-panel {
    max-width: 520px;
  }

  .research-grid,
  .app-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .app-card.primary {
    grid-column: span 2;
  }
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .brand-text {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    border-radius: 8px;
    display: none;
    flex-basis: 100%;
    flex-direction: column;
    width: 100%;
  }

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

  .site-nav a {
    border-radius: 6px;
    width: 100%;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 4.8rem);
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    gap: 2.5rem;
  }

  .profile-card {
    grid-template-columns: 1fr;
    margin-left: 0.6rem;
    margin-right: 0.6rem;
  }

  .hero-metrics,
  .research-grid,
  .app-grid,
  .demo-grid,
  .skills-grid {
    grid-template-columns: 1fr;
  }

  .hero-metrics div + div {
    border-left: 0;
    border-top: 1px solid var(--line);
  }


  .app-card.primary {
    grid-column: auto;
  }

  .publication-item {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}