:root {
  --bg: #0b0d12;
  --panel: #12151c;
  --text: #e6e8ef;
  --muted: #9aa3b2;
  --brand: #3b82f6;
  --brand-600: #2563eb;
  --accent: #22d3ee;
  --border: #1f2430;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  padding-top: 70px;
  padding-top: calc(70px + env(safe-area-inset-top));
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(11, 13, 18, 0.85);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 10px rgba(0,0,0,0.25);
}
.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding-top: env(safe-area-inset-top);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), var(--accent));
  color: #0b0d12;
  font-weight: 800;
}
.brand-text { font-weight: 700; letter-spacing: 0.2px; }

.site-nav ul { display: flex; gap: 8px; list-style: none; padding: 0; margin: 0; }
.site-nav a {
  display: inline-block;
  padding: 8px 12px;
  color: var(--muted);
  text-decoration: none;
  border-radius: 8px;
}
.site-nav a:hover, .site-nav a.active { color: var(--text); background: var(--panel); }

.nav-toggle { display: none; background: transparent; border: 0; padding: 8px; }
.nav-toggle .bar { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; transition: 0.2s; }

/* Hero */
.hero {
  padding: 72px 0 24px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
}
.hero-text h1 { font-size: 2.2rem; margin: 0 0 12px; line-height: 1.2; }
.hero-text p { color: var(--muted); margin: 0 0 16px; }
.hero-media img { width: 100%; height: auto; border-radius: 12px; border: 1px solid var(--border); }

.button {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  color: var(--text);
  text-decoration: none;
  background: var(--panel);
}
.button.primary { background: var(--brand); border-color: var(--brand-600); color: white; }
.button.primary:hover { background: var(--brand-600); }

/* Sections */
.section { padding: 56px 0; }
.section.alt { background: #0e1118; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { margin-top: 0; margin-bottom: 12px; font-size: 1.6rem; }
.section p { color: var(--muted); }
/* Highlighted objectives paragraph */
.objectives {
  background: rgba(59, 130, 246, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.35);
  color: var(--text);
  padding: 12px 14px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.15);
}
.objectives-title { font-weight: 600; margin-bottom: 6px; color: var(--text); }
.objectives-list { margin: 0; padding-left: 18px; color: var(--text); }
.objectives-list li { margin: 4px 0; }

.feature-list { margin: 12px 0 0; padding-left: 18px; color: var(--text); }
.feature-list li { margin: 8px 0; }

/* Publications */
.pub-list { margin: 16px 0 0; padding-left: 18px; }
.pub-title { display: block; color: var(--text); }
.pub-venue { color: var(--muted); font-size: 0.95rem; }

/* Final Projects */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 16px;
}
.project-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
}
.project-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}
.project-header h3 {
  margin: 0;
  font-size: 1.1rem;
  line-height: 1.3;
}
.project-year {
  background: var(--brand);
  color: white;
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
}
.project-author {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 8px 0;
}
.project-description {
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
  margin: 12px 0;
}
.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.tag {
  background: rgba(34, 211, 238, 0.12);
  color: var(--accent);
  padding: 4px 8px;
  border-radius: 6px;
  font-size: 0.8rem;
  border: 1px solid rgba(34, 211, 238, 0.3);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}
.card .person-photo {
  width: 100%;
  max-width: 120px;
  height: 120px;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  display: block;
}
.card h3 { margin: 8px 0 8px; }
.card p { margin: 0; color: var(--muted); }
.person-description {
  min-height: 3em;
  line-height: 1.5;
  display: block;
  margin: 8px 0;
}

.person-specialty {
  display: inline-block;
  margin-top: 8px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 4px 8px;
  border-radius: 10px;
  font-size: 0.85rem;
  min-height: 3em;
  line-height: 1.5;
  vertical-align: middle;
  width: 100%;
  box-sizing: border-box;
}
.avatar { width: 40px; height: 40px; border-radius: 10px; background: #1a2030; display: grid; place-items: center; font-weight: 700; }

.affiliation { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.affiliation-logo { width: auto; height: 20px; max-width: 100px; object-fit: contain; filter: saturate(0.6); border: 1px solid var(--border); border-radius: 6px; background: #ffffff; padding: 4px 6px; }
.affiliation-name { color: var(--muted); font-size: 0.95rem; }
.affiliation-link { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; }
.affiliation-link:hover .affiliation-name { color: var(--text); }

/* Logos */
.logo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.logo-item { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 20px; text-align: center; color: var(--text); }
.logo-item img { width: 100%; height: auto; max-height: 80px; object-fit: contain; filter: saturate(0.6); background: white; padding: 10px; border-radius: 8px; }
.logo-item .logo-name { margin-top: 10px; color: var(--text); font-size: 0.95rem; }

/* Footer */
.site-footer { border-top: 1px solid var(--border); background: #0e1118; }
.site-footer .container { padding: 20px 16px; }
.site-footer p { margin: 0; color: var(--muted); font-size: 0.95rem; }

/* Responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .logo-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
}

@media (max-width: 680px) {
  .site-nav { position: fixed; top: 70px; left: 0; right: 0; background: #0e1118; border-bottom: 1px solid var(--border); display: none; }
  .site-nav.open { display: block; }
  .site-nav ul { flex-direction: column; padding: 8px; }
  .nav-toggle { display: block; }
}

/* Contributors responsive tweaks */
@media (max-width: 540px) {
  .card-grid { grid-template-columns: 1fr; }
  .card { text-align: center; }
  .card .person-photo { margin: 0 auto; }
  .affiliation { justify-content: center; }
}

/* Anclas con compensación para header sticky */
section[id] { scroll-margin-top: 80px; }

/* Accessibility focus */
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

/* Smooth scroll */
html { scroll-behavior: smooth; }

/* Publications */
.publications-grid {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.publication-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.publication-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
}

.publication-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.5rem;
}

.publication-header h3 {
  margin: 0;
  font-size: 1.1rem;
  color: var(--text);
  flex: 1;
}

.publication-year {
  background: var(--accent);
  color: var(--bg);
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  margin-left: 1rem;
}

.publication-venue {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.publication-authors {
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

.publication-abstract {
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 0.75rem;
  font-size: 0.85rem;
}

.publication-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Publication links */
.publication-links {
  display: flex;
  gap: 0.75rem 1rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}
.publication-link {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--brand-600);
  background: linear-gradient(135deg, var(--brand), var(--brand-600));
  color: #ffffff;
  text-decoration: none;
  font-size: 0.86rem;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
  transition: transform 0.15s ease, box-shadow 0.2s ease, filter 0.2s ease;
}
.publication-link::after { content: "↗"; margin-left: 8px; font-size: 0.9em; line-height: 1; }
.publication-link:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(37, 99, 235, 0.35); filter: saturate(1.05); }
.publication-link[href="#"],
.publication-link[aria-disabled="true"],
.publication-link[disabled] {
  pointer-events: none;
  background: var(--panel);
  color: var(--muted);
  border-color: var(--border);
  box-shadow: none;
  opacity: 0.6;
  transform: none;
}
.publication-link[href="#"]::after,
.publication-link[aria-disabled="true"]::after,
.publication-link[disabled]::after { content: ""; }
.publication-doi {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid rgba(34, 211, 238, 0.35);
  background: rgba(34, 211, 238, 0.10);
  color: var(--text);
  font-size: 0.82rem;
  font-weight: 500;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  white-space: nowrap;
}
.publication-doi a { color: var(--accent); text-decoration: none; }
.publication-doi a:hover { text-decoration: underline; }

@media (max-width: 540px) {
  .publication-links { justify-content: center; gap: 0.5rem 0.75rem; }
}

@media (max-width: 768px) {
  .publications-grid {
    gap: 0.75rem;
  }
  
  .publication-card {
    padding: 0.75rem;
  }
}

/* Funding Section */
.funding-content {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  text-align: left;
  gap: 1.5rem;
  margin-top: 2rem;
}

.funding-text { max-width: 600px; flex: 1; }

.funding-text p {
  margin: 0.5rem 0;
  color: var(--text);
  line-height: 1.6;
}

.funding-text p:first-child {
  font-size: 1.1rem;
  color: var(--muted);
  margin-bottom: 1rem;
}

.funding-text strong {
  color: var(--accent);
  font-size: 1.2rem;
}

.funding-logos { display: flex; justify-content: flex-start; align-items: flex-start; gap: 1rem; flex-wrap: wrap; }

.funding-logo-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.funding-logo-item:hover { transform: none; box-shadow: none; }

.funding-logo-item img {
  max-width: 120px;
  max-height: 60px;
  width: auto;
  height: auto;
  object-fit: contain;
  background: white;
  padding: 8px;
  border-radius: 6px;
}

.funding-logo-name {
  font-weight: 600;
  color: var(--text);
  text-align: center;
  font-size: 0.9rem;
}

@media (max-width: 768px) {
  .funding-content { flex-direction: column; align-items: center; text-align: center; gap: 1rem; }
  .funding-logos { justify-content: center; }
  .funding-logo-item img { max-width: 110px; max-height: 55px; }
}