:root {
  --bg-color: #050712;
  --bg-elevated: #101322;
  --accent: #4fd1c5;
  --accent-soft: rgba(79, 209, 197, 0.18);
  --text-main: #f7fafc;
  --text-muted: #a0aec0;
  --border-subtle: rgba(255, 255, 255, 0.06);
  --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.65);
  --radius-lg: 16px;
  --radius-pill: 999px;
  --transition-fast: 0.16s ease-out;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
}

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

html,
body {
  margin: 0;
  padding: 0;
  font-family: var(--font-sans);
  background: radial-gradient(circle at top left, #1f2937 0, #050712 48%, #020308 100%);
  color: var(--text-main);
  scroll-behavior: smooth;
}

body {
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  opacity: 0.9;
  text-decoration: underline;
}

.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: linear-gradient(
    to bottom,
    rgba(5, 7, 18, 0.92),
    rgba(5, 7, 18, 0.82),
    transparent
  );
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0.25rem;
  gap: 1rem;
}

.branding {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.site-title {
  font-size: 1.3rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin: 0;
}

.site-title a {
  color: var(--text-main);
  text-decoration: none;
}

.site-subtitle {
  margin: 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.site-nav {
  display: flex;
  gap: 0.75rem;
  font-size: 0.8rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-nav a {
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  text-decoration: none;
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast);
}

.site-nav a:hover {
  color: var(--text-main);
  border-color: rgba(255, 255, 255, 0.06);
  background: rgba(15, 23, 42, 0.9);
  transform: translateY(-1px);
}

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

section {
  margin-bottom: 2.4rem;
}

.card {
  background: radial-gradient(circle at top left, #111827 0, #050712 55%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-soft);
  padding: 1.75rem 1.9rem;
}

.card-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.card-kicker {
  font-size: 0.75rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

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

p {
  margin-top: 0;
  color: var(--text-main);
  line-height: 1.6;
}

.text-muted {
  color: var(--text-muted);
}

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 2.2fr) minmax(0, 1.4fr);
  gap: 1.75rem;
  align-items: flex-start;
}

.about-main h2 {
  font-size: 1.8rem;
  margin-bottom: 0.1rem;
}

.about-main .title-line {
  font-size: 0.98rem;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.about-main .affiliation {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.about-main .keywords {
  margin-top: 0.85rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.chip {
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(79, 209, 197, 0.5);
}

.about-side {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: flex-start;
}

.avatar {
  width: 108px;
  height: 108px;
  border-radius: 24px;
  object-fit: cover;
  border: 1px solid rgba(148, 163, 184, 0.35);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.9);
  display: block;
}

.contact-list {
  font-size: 0.85rem;
  color: var(--text-muted);
}

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

.contact-list a:hover {
  text-decoration: underline;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.8rem;
  font-size: 0.78rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  text-decoration: none;
  background: rgba(15, 23, 42, 0.9);
  transition: background var(--transition-fast), color var(--transition-fast),
    border-color var(--transition-fast), transform var(--transition-fast);
}

.pill-link:hover {
  color: var(--text-main);
  border-color: rgba(148, 163, 184, 0.8);
  transform: translateY(-1px);
}

.pill-link-dot {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent);
}

.news-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.news-item {
  display: flex;
  gap: 0.8rem;
  padding: 0.5rem 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.06);
}

.news-item:last-child {
  border-bottom: none;
}

.news-date {
  min-width: 4.3rem;
  font-size: 0.78rem;
  color: var(--accent);
  text-transform: uppercase;
}

.news-text {
  font-size: 0.9rem;
}

.news-text em {
  font-style: normal;
  color: #e5e7eb;
}

.tagline {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 0.8rem;
}

.tag-pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.tag-pill {
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-pill);
  border: 1px solid rgba(148, 163, 184, 0.4);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.pub-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.pub-item {
  font-size: 0.9rem;
}

.pub-title {
  font-weight: 600;
}

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

.pub-venue {
  font-size: 0.85rem;
  color: var(--accent);
}

.pub-venue a {
  color: var(--accent);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.pub-venue a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.pub-links {
  margin-top: 0.15rem;
  font-size: 0.8rem;
}

.pub-links a {
  color: var(--accent);
  text-decoration: none;
  margin-right: 0.6rem;
}

.pub-links a:hover {
  text-decoration: underline;
}

.columns-2 {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 1.5rem;
}

.list-tight {
  margin: 0.2rem 0 0;
  padding-left: 1.2rem;
  font-size: 0.9rem;
}

.list-tight li {
  margin-bottom: 0.15rem;
}

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  padding: 1.4rem 0 1.7rem;
  background: radial-gradient(circle at bottom, #111827 0, #020308 55%);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

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

@media (max-width: 768px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

  .card {
    padding: 1.4rem 1.3rem;
  }

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