:root {
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-alt: #f1f5f9;
  --text: #0f172a;
  --muted: #475569;
  --soft: #64748b;
  --line: #e2e8f0;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #ccfbf1;
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius: 22px;
  --radius-sm: 16px;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: linear-gradient(to bottom, #f8fafc 0%, #ffffff 100%);
  color: var(--text);
  line-height: 1.7;
}

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

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 250, 252, 0.82);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.7);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  font-size: 1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
}

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

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

.nav-links a:hover {
  color: var(--text);
}

.hero {
  padding: 4.5rem 0 3rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.35fr 0.9fr;
  gap: 2rem;
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
}

.hero-summary {
  margin: 1.2rem 0 1.6rem;
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 58ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.18s ease, background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  color: #ffffff;
}

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

.button-secondary {
  background: #ffffff;
  color: var(--text);
  border: 1px solid var(--line);
}

.button-secondary:hover {
  border-color: #cbd5e1;
  color: var(--text);
}

.highlights {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.highlights li {
  padding: 0.6rem 0.85rem;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  font-weight: 500;
  font-size: 0.95rem;
}

.profile-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.profile-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  background: #dbeafe;
}

.profile-card-body {
  padding: 1.3rem;
}

.profile-card-body h2 {
  margin: 0 0 0.55rem;
  font-size: 1rem;
}

.profile-card-body p {
  margin: 0 0 0.75rem;
  color: var(--muted);
}

.contact-line {
  margin-bottom: 0;
  font-weight: 500;
}

.section {
  padding: 4rem 0;
}

.section-alt {
  background: var(--surface-alt);
  border-top: 1px solid rgba(226, 232, 240, 0.9);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.section-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.4fr;
  gap: 2rem;
  align-items: start;
}

.section-kicker {
  margin: 0 0 0.55rem;
  color: var(--accent);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.8rem;
}

.section-heading h2,
.section-header h2 {
  margin: 0;
  font-size: clamp(1.7rem, 4vw, 2.4rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.section-content p {
  margin: 0 0 1rem;
  color: var(--muted);
  font-size: 1.02rem;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  background: #ffffff;
  padding: 0.7rem 0.95rem;
  border-radius: 999px;
  color: var(--muted);
  font-weight: 500;
}

.section-header {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 2rem;
}

.section-note {
  color: var(--soft);
  margin: 0;
}

.pub-year {
  margin-bottom: 2.25rem;
}

.pub-year h3 {
  margin: 0 0 1rem;
  font-size: 1rem;
  color: var(--soft);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pub-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1.15rem 1.15rem 1rem;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.pub-card + .pub-card {
  margin-top: 0.95rem;
}

.pub-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(15, 23, 42, 0.08);
  border-color: #cbd5e1;
}

.pub-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.7rem;
}

.pub-badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}

.pub-badge-accent {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.pub-card h4 {
  margin: 0 0 0.55rem;
  font-size: 1.08rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.pub-card h4 a {
  color: var(--text);
}

.pub-card h4 a:hover {
  color: var(--accent);
}

.pub-authors,
.pub-venue {
  margin: 0;
}

.pub-authors {
  color: var(--muted);
}

.pub-venue {
  color: var(--soft);
  font-size: 0.96rem;
  margin-top: 0.2rem;
}

.site-footer {
  padding: 2rem 0 3rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--soft);
  font-size: 0.95rem;
  border-top: 1px solid var(--line);
  padding-top: 1.25rem;
}

@media (max-width: 920px) {
  .hero-grid,
  .section-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3rem;
  }

  .section {
    padding: 3.2rem 0;
  }
}

@media (max-width: 640px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.8rem 0;
  }

  .nav-links {
    gap: 0.85rem;
  }

  .hero h1 {
    line-height: 1;
  }

  .hero-summary {
    font-size: 1.02rem;
  }

  .section-header,
  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .container {
    width: min(var(--max), calc(100% - 1.25rem));
  }
}