:root {
  --bg: #f7f5ef;
  --panel: #ffffff;
  --text: #18211f;
  --muted: #5d6b66;
  --line: rgba(24, 33, 31, 0.12);
  --accent: #1f6f63;
  --accent-dark: #12463f;
  --accent-soft: #dcece7;
  --shadow: 0 24px 60px rgba(18, 70, 63, 0.10);
  --radius: 24px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(31, 111, 99, 0.14), transparent 32rem),
    radial-gradient(circle at 85% 10%, rgba(53, 126, 198, 0.10), transparent 28rem),
    var(--bg);
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 14px;
  color: white;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  box-shadow: 0 10px 24px rgba(31, 111, 99, 0.22);
}

.site-nav {
  display: flex;
  gap: 20px;
  align-items: center;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a {
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent-dark);
}

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.72);
  border-radius: 12px;
  padding: 8px 11px;
  font-size: 1.1rem;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 82px 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.75fr);
  gap: 36px;
  align-items: center;
  min-height: 78vh;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 22px;
  font-size: clamp(3.2rem, 8vw, 7rem);
  line-height: 0.9;
  letter-spacing: -0.075em;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.055em;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.15rem;
  letter-spacing: -0.025em;
}

.hero-subtitle {
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1.1rem, 2.2vw, 1.45rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 800;
}

.button.primary {
  color: white;
  background: var(--accent-dark);
  border-color: var(--accent-dark);
}

.button.secondary {
  background: rgba(255,255,255,0.68);
}

.hero-card,
.card,
.project,
.contact-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255,255,255,0.76);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 30px;
}

.card-label,
.project-kicker,
.timeline-date {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

.two-column,
.split-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 54px;
}

.body-copy {
  color: var(--muted);
  font-size: 1.08rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 26px;
}

.card p,
.project p,
.timeline-item p,
.note,
.contact-section p,
.hero-card p {
  color: var(--muted);
}

.project-list {
  display: grid;
  gap: 18px;
}

.project {
  padding: 28px;
}

.project h3 {
  font-size: 1.35rem;
}

.publication-list {
  display: grid;
  gap: 18px;
  margin: 0;
  padding-left: 22px;
  color: var(--muted);
}

.publication-list strong {
  color: var(--text);
}

.note {
  margin-top: 24px;
  font-size: 0.95rem;
}

.timeline {
  display: grid;
  gap: 16px;
}

.timeline-item {
  position: relative;
  padding: 24px;
  border-left: 4px solid var(--accent);
  border-radius: 18px;
  background: rgba(255,255,255,0.72);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.65fr);
  gap: 28px;
  align-items: start;
}

.contact-card {
  display: grid;
  gap: 12px;
  padding: 26px;
}

.contact-card a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--accent-soft);
  text-decoration: none;
  font-weight: 800;
}

.contact-card a::after {
  content: "↗";
  color: var(--accent-dark);
}

.site-footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 32px 24px 56px;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

@media (max-width: 860px) {
  .site-header {
    align-items: flex-start;
  }

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

  .site-nav {
    display: none;
    position: absolute;
    top: 72px;
    right: 24px;
    left: 24px;
    flex-direction: column;
    align-items: stretch;
    padding: 18px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255,255,255,0.96);
    box-shadow: var(--shadow);
  }

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

  .hero,
  .two-column,
  .split-panel,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 60px;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 58px 20px;
  }

  h1 {
    font-size: clamp(3rem, 15vw, 5.3rem);
  }
}

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