@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Shippori+Mincho+B1:wght@400;500;600;700&display=swap');

:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #0c1f3f;
  --muted: #344562;
  --muted-soft: #4e5d78;
  --border: #e2e8f0;
  --outline: #d0d7e2;
  --accent: #f59ac4;
  --accent-soft: rgba(245, 154, 196, 0.18);
  --accent-strong: #d26c98;
  --font-sans: "Inter", "Noto Sans JP", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Shippori Mincho B1", "Noto Serif JP", "Cormorant Garamond", serif;
  --font-mono: "IBM Plex Mono", SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-feature-settings: "ss01", "ss02";
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  color: var(--text);
  font-weight: 500;
  letter-spacing: -0.01em;
}

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

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

.site-max {
  max-width: 1100px;
}

nav.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.8);
  border-bottom: 1px solid rgba(226, 232, 240, 0.9);
}

.nav-link {
  position: relative;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color 0.25s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  height: 2px;
  width: 0;
  background: var(--accent);
  transition: width 0.25s ease;
}

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

.nav-link.is-active {
  color: var(--text);
}

.nav-link.is-active::after {
  width: 100%;
}

.nav-quick {
  display: flex;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.85rem;
  flex-wrap: wrap;
  align-items: center;
}

.nav-quick-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.75rem;
  border-radius: 9999px;
  font-weight: 500;
  color: var(--muted);
  background: rgba(15, 23, 42, 0.04);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.nav-quick-link:hover {
  color: var(--text);
  background: rgba(15, 23, 42, 0.08);
  transform: translateY(-1px);
}

.nav-quick-icon {
  display: inline-flex;
  width: 1.4rem;
  height: 1.4rem;
  align-items: center;
  justify-content: center;
}

.nav-quick-icon svg {
  width: 100%;
  height: 100%;
}

.section-subtitle {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 500;
  margin-bottom: 1.2rem;
  color: var(--text);
}

.publication-section + .publication-section {
  margin-top: 3.5rem;
}

.publication-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .publication-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
  }
}

.publication-links,
.work-links {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.publication-links a,
.work-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.work-section {
  display: grid;
  gap: 1.5rem;
}

.work-section-title {
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
}

.work-grid {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .work-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2rem;
  }
}

.hero {
  padding-top: clamp(4rem, 8vw, 6.5rem);
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

.hero-title {
  font-size: clamp(2.7rem, 5vw, 3.8rem);
  line-height: 1.05;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
  font-family: var(--font-serif);
}

.hero-lead {
  font-size: 1.1rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  color: var(--muted);
  max-width: 40rem;
}

.accent-divider {
  width: 64px;
  height: 3px;
  border-radius: 9999px;
  background: var(--accent);
  margin-bottom: 1.5rem;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem 0.65rem;
  border-radius: 9999px;
  font-size: 0.66rem;
  letter-spacing: 0.05em;
  font-weight: 600;
  text-transform: uppercase;
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.chip-sm {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.5rem;
  border-radius: 9999px;
  font-size: 0.6rem;
  letter-spacing: 0.03em;
  font-weight: 500;
  background: rgba(15, 23, 42, 0.06);
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 9px;
  font-weight: 500;
  padding: 0.6rem 1rem;
  font-size: 0.88rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary {
  background: var(--text);
  color: #ffffff;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.16);
  background: #060b1a;
}

.btn-secondary {
  background: #f4f6fb;
  color: var(--text);
}

.btn-secondary:hover {
  transform: translateY(-1px);
  background: #eaedf6;
}

.hero-grid {
  display: grid;
  gap: 1rem;
}

.hero-grid .profile-wrap {
  justify-self: end;
}

.profile-photo {
  width: 260px;
  height: 260px;
  border-radius: 28px;
  object-fit: cover;
  border: 1px solid var(--outline);
  background: #f2f4f8;
}

.current-panel {
  display: grid;
  gap: 0.75rem;
  padding: 1.5rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, rgba(245, 154, 196, 0.2), rgba(245, 154, 196, 0.06));
  max-width: 260px;
}

.current-panel h3 {
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  font-family: var(--font-serif);
  color: var(--muted);
  text-transform: none;
  font-weight: 500;
}

.current-panel ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0.6rem;
}

.current-panel li {
  font-size: 0.75rem;
  color: var(--text);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.75rem;
  max-width: 560px;
}

.stat {
  font-size: 1.3rem;
  font-weight: 600;
}

.stat-label {
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  font-family: var(--font-mono);
  color: var(--muted);
}

.section-title {
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  font-family: var(--font-serif);
}

.section-intro {
  font-size: 1rem;
  color: var(--muted);
  line-height: 1.7;
  max-width: 42rem;
}

.section-header {
  display: grid;
  gap: 0.5rem;
  margin-bottom: 3rem;
}

.accent-rule {
  width: 48px;
  height: 2px;
  border-radius: 9999px;
  background: var(--accent);
}

.card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.25rem 1.4rem;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: rgba(245, 154, 196, 0.55);
  box-shadow: 0 18px 40px -22px rgba(12, 31, 63, 0.45);
}

.card h3 {
  margin: 0 0 0.32rem;
  font-size: 1.04rem;
  font-weight: 500;
  font-family: var(--font-serif);
  letter-spacing: -0.01em;
}

.card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.55;
  font-size: 0.92rem;
}

.contrib-list {
  margin: 1.25rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.6rem;
}

.contrib-list li {
  position: relative;
  padding-left: 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.65;
}

.contrib-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  border-radius: 9999px;
  background: var(--accent);
}

.card a {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  margin-top: 0.95rem;
  color: var(--muted);
  font-weight: 500;
}

.card a span.chevron {
  transition: transform 0.2s ease;
}

.card:hover a span.chevron {
  transform: translateX(4px);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.6rem;
  border-radius: 9999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  background: #edf1fb;
  color: var(--muted);
}

.badge-preprint {
  background: rgba(245, 154, 196, 0.24);
  color: var(--accent-strong);
}

.grid-explore {
  display: grid;
  gap: 1.25rem;
}

.grid-explore .card {
  padding: 1.1rem 1.35rem;
  border-radius: 16px;
}

.grid-explore .card h3 {
  font-size: 1.02rem;
  margin-bottom: 0.3rem;
}

.grid-explore .card p {
  font-size: 0.9rem;
  line-height: 1.55;
  margin-bottom: 0.9rem;
}

.grid-explore .card span.text-sm {
  font-size: 0.8rem;
}

.thread-grid {
  display: grid;
  gap: 1.5rem;
}

.thread-grid blockquote {
  margin: 0;
  width: 100% !important;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(150deg, rgba(245, 154, 196, 0.16), rgba(255, 255, 255, 0.8));
  padding: 1rem;
  box-sizing: border-box;
}

.thread-grid blockquote.twitter-tweet {
  transition: transform 0.2s ease;
}

.thread-grid blockquote.twitter-tweet:hover {
  transform: translateY(-3px);
}

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.footer {
  border-top: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.95);
  padding: 3rem 0;
  font-size: 0.9rem;
  color: var(--muted);
}

.footer a {
  color: var(--muted);
}

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

.footer-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  align-items: center;
}

.contact-grid {
  display: grid;
  gap: 2rem;
}

.contact-card {
  border-radius: 18px;
  border: 1px solid var(--border);
  background: linear-gradient(160deg, rgba(245, 154, 196, 0.18), rgba(255, 255, 255, 0.7));
  padding: 2rem;
}

.contact-card h2 {
  margin-top: 0;
}

.contact-meta {
  display: grid;
  gap: 0.4rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.contact-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.55rem 0.9rem;
  border-radius: 9999px;
  border: 1px solid var(--border);
  background: rgba(244, 246, 251, 0.8);
  font-size: 0.82rem;
  font-weight: 500;
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.contact-pill:hover {
  transform: translateY(-2px);
  border-color: rgba(245, 154, 196, 0.5);
}

@media (min-width: 768px) {
  .hero-grid {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .hero-grid .hero-copy {
    grid-column: span 7;
  }

  .hero-grid .profile-wrap {
    grid-column: span 5;
    align-self: start;
  }

  .current-panel {
    margin-top: 1.5rem;
  }

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

  .grid-explore .card.contact-card-link {
    grid-column: span 2;
  }

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

  .contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }
}

@media (max-width: 767px) {
  .nav-quick {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }

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