:root {
  --bg: #f8fafc;
  --bg-soft: #eef2ff;
  --panel: #ffffff;
  --panel-2: #f8fbff;
  --text: #0f172a;
  --muted: #475569;
  --line: rgba(15, 23, 42, 0.08);
  --accent: #2563eb;
  --accent-2: #7c3aed;
  --shadow: 0 20px 50px rgba(15, 23, 42, 0.08);
  --radius: 22px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 30%),
    radial-gradient(circle at top right, rgba(124, 58, 237, 0.08), transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.65;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(var(--max), calc(100% - 2rem));
  margin: 0 auto;
}

.narrow {
  width: min(820px, calc(100% - 2rem));
}

.section {
  padding: 5rem 0;
}

.alt-bg {
  background: #f8fbff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid var(--line);
}

.nav-wrap {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-weight: 800;
  letter-spacing: -0.03em;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.site-nav a {
  color: var(--muted);
  font-weight: 500;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.text-link:hover {
  color: var(--accent);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 5px 0;
  background: var(--text);
}

.hero {
  padding-top: 6.5rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  padding: 0.35rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(125, 211, 252, 0.28);
  background: rgba(125, 211, 252, 0.08);
  color: var(--accent);
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 1rem 0 1rem;
  font-size: clamp(2.3rem, 5vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
}

.hero h1 span {
  color: var(--accent);
}

.hero-text {
  color: var(--muted);
  font-size: 1.06rem;
  max-width: 66ch;
}

.hero-actions,
.contact-links,
.inline-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.hero-actions {
  margin: 1.6rem 0 1.4rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

.button-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #08111d;
}

.button-secondary {
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.03);
}

.hero-stats {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.9rem;
}

.hero-stats li {
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.03);
}

.hero-stats strong,
.snapshot-list strong {
  display: block;
  margin-bottom: 0.28rem;
}

.hero-stats span,
.snapshot-list,
.project-card p,
.skills-card p,
.publication-card p,
.section-note,
.section p {
  color: var(--muted);
}

.card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
}

.hero-panel h2,
.section-heading h2,
.project-card h3,
.skills-card h3,
.publication-card h3,
.focus-card h3 {
  margin-top: 0;
  letter-spacing: -0.03em;
}

.snapshot-list {
  list-style: none;
  padding: 0;
  margin: 0 0 1.2rem;
  display: grid;
  gap: 0.8rem;
}

.section-heading {
  margin-bottom: 2rem;
}

.section-heading h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  margin: 0.75rem 0 0;
}

.grid {
  display: grid;
  gap: 1.2rem;
}

.three-up {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.focus-card,
.project-card,
.skills-card,
.publication-card {
  height: 100%;
}

.project-card ul {
  margin: 1rem 0 1rem 1.15rem;
  padding: 0;
  color: var(--muted);
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.85rem;
}

.tag {
  display: inline-flex;
  padding: 0.28rem 0.62rem;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid rgba(125, 211, 252, 0.22);
  color: var(--accent);
  background: rgba(125, 211, 252, 0.08);
}

.text-link {
  font-weight: 700;
  color: var(--text);
}

.skills-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.center-text {
  text-align: center;
}

.site-footer {
  padding: 1.4rem 0 2.2rem;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

@media (max-width: 960px) {
  .hero-grid,
  .three-up,
  .two-up,
  .skills-layout {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 5.5rem;
  }
}

@media (max-width: 760px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--line);
  }

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

  .section {
    padding: 4rem 0;
  }

  .footer-wrap {
    flex-direction: column;
  }
}