:root {
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f8;
  --color-text: #1c1f24;
  --color-text-muted: #4a5561;
  --color-primary: #0f3d5c;
  --color-primary-dark: #0a2a40;
  --color-accent: #0e7c72;
  --color-border: #d7dde3;
  --color-warning-bg: #fff6e0;
  --color-warning-border: #e0b93a;
  --max-width: 1080px;
  --radius: 8px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

img { max-width: 100%; }

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

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Skip link */
.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* Site header / nav */
.site-header {
  background: var(--color-primary);
  color: #fff;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: 0 1px 4px rgba(0,0,0,0.2);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 0.75rem;
  padding-bottom: 0.75rem;
}
.site-header .brand {
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #fff;
  text-decoration: none;
  font-size: 1.1rem;
}
.site-nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 0;
  padding: 0;
}
.site-nav a {
  color: #e4ecf3;
  text-decoration: none;
  font-size: 0.92rem;
}
.site-nav a:hover, .site-nav a:focus { color: #fff; text-decoration: underline; }

.lang-switch {
  display: flex;
  gap: 0.25rem;
}
.lang-switch button {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.5);
  color: #fff;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}
.lang-switch button[aria-pressed="true"] {
  background: #fff;
  color: var(--color-primary);
  font-weight: 600;
}

/* Language visibility (!important: must always win over any component's own `display`) */
[data-lang="en"] { display: none !important; }
html[data-active-lang="en"] [data-lang="es"] { display: none !important; }
html[data-active-lang="en"] [data-lang="en"] { display: block !important; }
html[data-active-lang="en"] span[data-lang="en"],
html[data-active-lang="en"] a[data-lang="en"] { display: inline !important; }
html[data-active-lang="en"] li[data-lang="en"] { display: list-item !important; }

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 3rem 0 2.5rem;
}
.hero .acronym {
  display: inline-block;
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  margin: 0 0 0.25rem;
}
.hero h1 {
  font-size: 1.25rem;
  font-weight: 400;
  margin: 0 0 1rem;
  color: #dce8f2;
}
.hero .meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem 2rem;
  margin-top: 1.5rem;
  font-size: 0.92rem;
}
.hero .meta-grid dt { color: #b9cbdc; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.hero .meta-grid dd { margin: 0.1rem 0 0; }
.hero .ref-badge {
  display: inline-block;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.35);
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  font-size: 0.85rem;
  margin-top: 0.75rem;
}
.hero .pi-list { margin: 0; padding: 0; list-style: none; }
.hero .pi-list li { margin-bottom: 0.2rem; }
.hero .pi-list a { color: #dce8f2; }
.institutional-logos {
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1.75rem;
}
.institutional-logos img {
  height: 92px;
  width: auto;
  background: #fff;
  border-radius: 10px;
  padding: 10px 18px;
}

/* Sections */
section { padding: 2.75rem 0; border-bottom: 1px solid var(--color-border); }
section:last-of-type { border-bottom: none; }
section h2 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-top: 0;
  border-left: 4px solid var(--color-accent);
  padding-left: 0.7rem;
}
section.alt { background: var(--color-bg-alt); }

/* Funding block */
.funding-block {
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}
.funding-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  align-items: center;
  justify-content: flex-start;
  margin-bottom: 1.25rem;
}
.funding-logos img { height: 70px; width: auto; }
.funding-logos img.funding-logos-combined {
  height: auto;
  width: 100%;
  max-width: 480px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: #fff;
}
.site-footer .funding-logos img.funding-logos-combined { border-color: rgba(255,255,255,0.25); }
.funding-text {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  border-top: 1px dashed var(--color-border);
  padding-top: 1rem;
}
.funding-text code {
  display: block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  padding: 0.6rem 0.8rem;
  margin: 0.4rem 0 0.8rem;
  font-size: 0.9rem;
  white-space: pre-wrap;
}
.funding-note {
  background: var(--color-warning-bg);
  border: 1px solid var(--color-warning-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  margin-top: 1rem;
}

/* Objectives */
.objectives-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.25rem;
}
.objective-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}
.objective-card .obj-tag {
  display: inline-block;
  font-weight: 700;
  color: #fff;
  background: var(--color-accent);
  border-radius: 4px;
  padding: 0.1rem 0.5rem;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

/* Outreach downloads */
.download-list {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}
.download-btn {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 0.8rem 1.2rem;
  text-decoration: none;
  min-width: 220px;
}
.download-btn:hover { border-color: var(--color-accent); }
.download-btn .download-label { font-weight: 600; color: var(--color-primary); }
.download-btn .download-meta { font-size: 0.8rem; color: var(--color-text-muted); }

/* Results */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}
.stat-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem;
}
.stat-card .stat-number {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--color-primary);
  margin: 0 0 0.35rem;
}
.stat-card p:not(.stat-number) {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
}

/* Publications */
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub-list li {
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--color-border);
}
.pub-list li:first-child { padding-top: 0; }
.pub-status {
  display: inline-block;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.05rem 0.45rem;
  border-radius: 3px;
  margin-left: 0.5rem;
  background: #e6f4f1;
  color: var(--color-accent);
  vertical-align: middle;
}
.pub-status.pending { background: #fdeee0; color: #a15c0d; }
.pub-status.preprint { background: #eef1f5; color: #4a5561; }
.conf-note { margin-top: 1rem; font-size: 0.9rem; color: var(--color-text-muted); }

/* Repos */
.repo-groups { display: grid; gap: 1.25rem; }
.repo-group h3 { margin-bottom: 0.4rem; font-size: 1.05rem; color: var(--color-primary-dark); }
.repo-chips { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0; padding: 0; list-style: none; }
.repo-chips li a {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 0.3rem 0.8rem;
  font-size: 0.85rem;
  text-decoration: none;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.repo-chips li a:hover { border-color: var(--color-accent); color: var(--color-accent); }
.pending-tag { font-size: 0.72rem; color: var(--color-text-muted); }
.dataset-list { list-style: none; margin: 0.75rem 0 0; padding: 0; font-size: 0.92rem; }
.dataset-list li { padding: 0.4rem 0; border-bottom: 1px solid var(--color-border); }
.dataset-list li:last-child { border-bottom: none; }
.dataset-list code { font-size: 0.85rem; background: var(--color-bg-alt); padding: 0.05rem 0.35rem; border-radius: 3px; }

/* Demonstrator */
.media-placeholder {
  background: var(--color-bg-alt);
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}
.gallery-placeholder {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem;
}
.gallery-placeholder .ph {
  aspect-ratio: 4/3;
  background: var(--color-bg-alt);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 0.5rem;
}
.gallery-photo {
  margin: 0;
  aspect-ratio: 4/3;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  position: relative;
}
.gallery-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gallery-photo figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(transparent, rgba(10,20,30,0.75));
  color: #fff;
  font-size: 0.78rem;
  padding: 1.2rem 0.6rem 0.4rem;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.team-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.9rem 1.1rem;
}
.team-card .role { font-size: 0.78rem; text-transform: uppercase; color: var(--color-accent); letter-spacing: 0.03em; }
.collab-list { columns: 2; column-gap: 2rem; }
@media (max-width: 600px) { .collab-list { columns: 1; } }

/* Transfer */
.transfer-item {
  background: #fff;
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
}

/* Footer */
.site-footer {
  background: var(--color-primary-dark);
  color: #dce8f2;
  padding: 2.5rem 0 2rem;
}
.site-footer h2 {
  color: #fff;
  border-left-color: var(--color-accent);
  font-size: 1.2rem;
}
.site-footer .funding-block {
  background: rgba(255,255,255,0.05);
  border-color: rgba(255,255,255,0.2);
}
.site-footer .funding-text { color: #b9cbdc; }
.site-footer .funding-text code { background: rgba(255,255,255,0.08); border-color: rgba(255,255,255,0.25); color: #fff; }
.site-footer a { color: #9fd0ea; }
.site-footer .contact { margin-top: 1.25rem; font-size: 0.9rem; }
.site-footer .fine-print { margin-top: 1.5rem; font-size: 0.78rem; color: #8ba4b8; }

@media (max-width: 700px) {
  .hero .acronym { font-size: 1.9rem; }
  section { padding: 2rem 0; }
}