:root {
  --bg: #f7f8fb;
  --panel: #ffffff;
  --muted: #4b5563;
  --text: #0f172a;
  --accent: #2563eb;
  --accent-2: #0ea5e9;
  --border: rgba(15, 23, 42, 0.12);
  --font-primary: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--text);
  background: radial-gradient(120% 120% at 10% 10%, rgba(37, 99, 235, 0.08), transparent),
    radial-gradient(100% 120% at 80% 0%, rgba(14, 165, 233, 0.08), transparent),
    var(--bg);
  font-family: var(--font-primary);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

.hero {
  padding: 32px 5vw 48px;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  position: sticky;
  top: 0;
  backdrop-filter: blur(10px);
  z-index: 10;
}

.brand {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-links a {
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 10px;
  transition: background 0.2s ease;
}

.nav-links a:hover {
  background: var(--border);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 20px;
  padding: 6px 10px;
  border-radius: 10px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 28px;
  align-items: center;
  margin-top: 20px;
}

.intro h1 {
  font-size: clamp(32px, 4vw, 48px);
  margin: 6px 0 12px;
  letter-spacing: -0.02em;
}

.intro .lede {
  color: var(--muted);
  max-width: 700px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 12px;
  color: var(--accent);
  margin: 0;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 12px;
}

.btn {
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041017;
  box-shadow: 0 10px 30px rgba(90, 240, 184, 0.2);
}

.btn.ghost {
  border-color: var(--border);
}

.pill {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--border);
  text-decoration: none;
  font-weight: 600;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.chip {
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--muted);
  font-size: 14px;
}

.profile-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  box-shadow: 0 18px 50px rgba(15, 23, 42, 0.1);
}

.profile-card img {
  width: 90%;
  max-width: 220px;
  border-radius: 12px;
  border: 1px solid var(--border);
  object-fit: cover;
}

.profile-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  color: var(--muted);
  text-align: center;
}

.section {
  padding: 48px 5vw;
}

.section-header h2 {
  margin: 6px 0 18px;
  font-size: 28px;
}

.two-col {
  display: grid;
  grid-template-columns: 2fr 1.2fr;
  gap: 22px;
  align-items: start;
}

.callout {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px 20px;
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.08);
}

.callout h3 {
  margin-top: 0;
}

.callout ul {
  padding-left: 18px;
  color: var(--muted);
}

.callout-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 12px;
  color: var(--muted);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 18px;
}

.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
  min-height: 200px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}

.card h3 {
  margin: 6px 0 10px;
}

.text-link {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
}

.button-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin: 14px 0;
}

.mini-list ul {
  padding-left: 18px;
  margin: 8px 0;
  color: var(--muted);
}

.legacy-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}
.legacy-card.wide-card {
  width: 100%;
  margin-top: 16px;
}

.legacy-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.badge {
  background: rgba(90, 240, 184, 0.1);
  border: 1px solid var(--accent);
  color: var(--accent);
  padding: 6px 10px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 12px;
}

.details summary,
summary {
  cursor: pointer;
  font-weight: 600;
}
details {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
  padding: 8px 12px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.18);
}
details summary {
  letter-spacing: -0.01em;
  list-style: none;
}
details[open] {
  border-color: var(--accent);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.25);
}

.legacy-content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.6;
  max-height: 420px;
  overflow: auto;
  box-shadow: inset 0 1px 0 rgba(15, 23, 42, 0.04), 0 10px 30px rgba(15, 23, 42, 0.08);
}
.legacy-content p {
  margin: 0 0 10px;
}
.legacy-content h2,
.legacy-content h3,
.legacy-content h4 {
  margin: 6px 0 8px;
  color: var(--text);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
  letter-spacing: -0.01em;
}
.legacy-content ul {
  margin: 6px 0 12px 18px;
}
.legacy-content ol {
  margin: 6px 0 12px 20px;
}
.legacy-content ul.publication-list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}
.legacy-content ul.publication-list > li {
  list-style: none;
  margin: 16px 0;
  padding: 20px;
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: 20px;
  background: linear-gradient(180deg, #ffffff, #f4f7ff);
  box-shadow: 0 18px 34px rgba(15, 23, 42, 0.12);
  display: flex;
  gap: 14px;
  align-items: flex-start;
  flex-wrap: wrap;
  position: relative;
}
.legacy-content ul.publication-list > li + li {
  margin-top: 14px;
}
.legacy-content #writings-list ul {
  list-style: none;
  padding-left: 0;
}
.legacy-content #writings-list li {
  list-style: none;
  margin: 16px 0;
  padding: 18px 20px;
  border: 1px solid rgba(37, 99, 235, 0.12);
  border-radius: 16px;
  background: linear-gradient(180deg, #ffffff, #f4f7ff);
  box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
}
.legacy-content #writings-list li + li {
  margin-top: 14px;
}
.legacy-content ul.publication-list h4 {
  margin: 0 0 8px;
  border-bottom: none;
  padding-bottom: 0;
  color: #0b3b8a;
  font-weight: 700;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0));
  display: inline-block;
  padding: 4px 10px;
  border-radius: 8px;
}
.legacy-content .pub-title {
  display: block;
  font-weight: 750;
  font-size: 17px;
  color: #0b3b8a;
  letter-spacing: -0.01em;
  background: linear-gradient(90deg, rgba(37, 99, 235, 0.14), rgba(14, 165, 233, 0.05));
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid rgba(37, 99, 235, 0.25);
  box-shadow: 0 12px 22px rgba(15, 23, 42, 0.1);
  margin-bottom: 6px;
}
.legacy-content .pub-section {
  margin-bottom: 24px;
}
.legacy-content .pub-section h3 {
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}
.legacy-content .pub-section.pub-conference h3 {
  color: #0f3a8f;
}
.legacy-content .pub-section.pub-journal h3 {
  color: #0f5132;
}
.legacy-content .pub-section.pub-manuscripts h3 {
  color: #92400e;
}
.legacy-content .pub-section.pub-conference .publication-list > li {
  background: #eef4ff;
  border-color: #c8d8ff;
}
.legacy-content .pub-section.pub-journal .publication-list > li {
  background: #f3fff6;
  border-color: #ccefd5;
}
.legacy-content .pub-section.pub-manuscripts .publication-list > li {
  background: #fff7ef;
  border-color: #f3d3ad;
}
.legacy-content ul.publication-list .pub-body {
  flex: 1 1 0%;
}
.legacy-content .pub-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  padding: 8px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.15);
  flex-shrink: 0;
}
.legacy-content ul.publication-list p {
  margin: 4px 0 8px;
}
.legacy-content strong {
  color: var(--accent);
}
.legacy-content .award-highlight {
  color: var(--accent);
  font-weight: 600;
}
.legacy-content .pub-body {
  color: var(--muted);
  flex: 1 1 0%;
}
.legacy-content .btn,
.legacy-content button {
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  cursor: pointer;
}
.legacy-content .card {
  background: rgba(0, 0, 0, 0.16);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}
.legacy-content .card-block {
  background: transparent;
  border: none;
  padding: 0;
  width: 100% !important;
}
.legacy-content table {
  width: 100%;
  border-collapse: collapse;
}
.legacy-content table td,
.legacy-content table th {
  border: 1px solid var(--border);
  padding: 6px;
}
.legacy-content .collapse {
  display: none;
}
.legacy-content .collapse.show {
  display: block;
}
.legacy-content .collapse {
  margin-top: 8px;
  padding-left: 8px;
}
.legacy-content .collapse .card {
  margin: 8px 0 0 0;
  padding: 14px;
  width: 100% !important;
}
.legacy-content .collapse {
  margin-top: 8px;
}
.legacy-content .btn.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: var(--accent-2);
  color: #041017;
}
.legacy-content .btn.btn-info {
  border-color: var(--accent-2);
  color: var(--text);
}
.legacy-content li {
  margin-bottom: 6px;
}
.legacy-content a {
  color: var(--accent);
}
.legacy-content a:hover {
  color: var(--accent-2);
}
.legacy-content br {
  line-height: 1.4;
}
.legacy-content .wrapper,
.legacy-content article,
.legacy-content .container {
  background: transparent !important;
  width: 100% !important;
  margin: 0 auto;
  padding: 0;
}
.legacy-card details .legacy-content {
  display: none;
}
.legacy-content .close-overlay {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #f8fafc;
  color: var(--text);
  cursor: pointer;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.15);
}
.legacy-card details[open] .legacy-content {
  position: fixed;
  top: 5vh;
  left: 5vw;
  width: 90vw;
  height: 90vh;
  max-height: none;
  padding: 56px 28px 28px;
  overflow: auto;
  z-index: 999;
  background: #ffffff;
  border: 1px solid var(--accent);
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.18);
  display: block;
}
.legacy-card details[open]::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(15, 23, 42, 0.18);
  z-index: 998;
}
.legacy-card details[open] summary {
  display: none;
}
body.overlay-active {
  overflow: hidden;
}

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

.collab-trigger {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
}
.collab-trigger:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
}

.collab-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 5vw;
  background: rgba(15, 23, 42, 0.45);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  z-index: 50;
}
.collab-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.collab-dialog {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 22px 24px 20px;
  width: min(960px, 100%);
  max-height: 80vh;
  overflow: auto;
  box-shadow: 0 30px 80px rgba(15, 23, 42, 0.2);
}

.collab-close {
  position: absolute;
  top: 12px;
  right: 12px;
  border: 1px solid var(--border);
  background: #f8fafc;
  border-radius: 12px;
  padding: 8px 10px;
  font-size: 14px;
  cursor: pointer;
}

.collab-header h3 {
  margin: 6px 0 8px;
}
.collab-header p {
  margin-top: 0;
  max-width: 640px;
}

.collab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.collab-group {
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.6);
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}
.collab-group h4 {
  margin: 0 0 10px;
  text-decoration: underline;
}
.collab-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 8px;
}
.collab-list a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
}
.collab-list a:hover {
  color: var(--accent);
}

.contact {
  padding-bottom: 32px;
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.contact-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 16px;
  color: var(--muted);
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
}

.contact-card h3 {
  margin-top: 0;
  color: var(--text);
}

.contact-card ul {
  padding-left: 18px;
  margin: 8px 0 0;
}
.social-grid {
  display: grid;
  gap: 10px;
}
.social-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  text-decoration: none;
  color: var(--text);
  box-shadow: 0 10px 20px rgba(15, 23, 42, 0.08);
}
.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.contact-card .muted a {
  text-decoration: none;
  color: var(--accent);
  font-weight: 600;
  border-bottom: 1px dashed rgba(37, 99, 235, 0.5);
  padding-bottom: 1px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.contact-card .muted a:hover {
  color: var(--accent-2);
  border-color: var(--accent-2);
}
.icon-circle {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 12px;
}
.scholar-icon { background: linear-gradient(135deg, #4285f4, #6699ff); }
.twitter-icon { background: linear-gradient(135deg, #1da1f2, #0d8ddc); }
.linkedin-icon { background: linear-gradient(135deg, #0a66c2, #0e7ad7); }
.github-icon { background: linear-gradient(135deg, #24292e, #3b4148); }
.bitbucket-icon { background: linear-gradient(135deg, #2684ff, #4c9aff); }

.site-footer {
  padding: 18px 5vw 32px;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: rgba(0, 0, 0, 0.2);
}

@media (max-width: 900px) {
  .hero-grid,
  .two-col {
    grid-template-columns: 1fr;
  }

  .nav {
    position: static;
  }

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

  .nav-links {
    position: absolute;
    top: 64px;
    right: 5vw;
    background: var(--panel);
    box-shadow: 0 18px 40px rgba(15, 23, 42, 0.12);
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 12px;
    flex-direction: column;
    display: none;
  }

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

@media (max-width: 600px) {
  .legacy-content ul.publication-list > li {
    padding: 14px 12px;
  }
  .profile-card img {
    max-width: 180px;
  }
  #personal table {
    display: block;
    overflow-x: auto;
  }
}