.creditos-hero{
  padding: 64px 0 48px;
  background:
    radial-gradient(circle at 20% 20%, rgba(77,208,225,0.08), transparent 55%),
    radial-gradient(circle at 80% 80%, rgba(166,124,82,0.06), transparent 55%);
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.creditos-hero h1{
  font-size: clamp(1.9rem, 4vw, 2.9rem);
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.creditos-hero p{
  color: var(--text-2);
  max-width: 62ch;
  margin: 0 auto;
  font-size: 1.02rem;
}

.fuentes-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: 18px;
  margin: 32px 0;
}
.fuente{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: border-color var(--t-med), transform var(--t-med), box-shadow var(--t-med);
  position: relative;
  overflow: hidden;
}
.fuente::before{
  content: "";
  position: absolute;
  top: 0; left: 0;
  height: 3px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--t-med);
}
.fuente:hover{
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
}
.fuente:hover::before{ opacity: 1; }

.fuente .tipo{
  display: inline-flex;
  align-self: flex-start;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  padding: 3px 10px;
  border-radius: 100px;
}
.fuente h4{
  font-size: 1.05rem;
  color: var(--text);
  line-height: 1.35;
}
.fuente .desc{
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
  line-height: 1.55;
  flex: 1;
}
.fuente .url{
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--text-2);
  overflow-wrap: anywhere;
  padding-top: 12px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.fuente .url a{
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.85rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 500;
}
.fuente .url a:hover{ color: var(--accent-hover); }

.creditos-img-grid{
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(260px, 100%), 1fr));
  gap: 20px;
  margin: 32px 0;
}
.credito-img{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--t-med), border-color var(--t-med), box-shadow var(--t-med);
}
.credito-img:hover{
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}
.credito-img .thumb{
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
  background: var(--surface-2);
}
.credito-img .thumb img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85);
  transition: transform var(--t-slow), filter var(--t-slow);
}
.credito-img:hover .thumb img{
  transform: scale(1.05);
  filter: saturate(1);
}
.credito-img .info{
  padding: 18px 20px 20px;
}
.credito-img h5{
  font-size: 0.98rem;
  color: var(--text);
  margin-bottom: 6px;
  line-height: 1.35;
}
.credito-img .autor{
  font-size: 0.82rem;
  color: var(--muted);
  margin: 0 0 4px;
}
.credito-img .licencia{
  display: inline-block;
  font-size: 0.72rem;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  padding: 2px 8px;
  border-radius: 100px;
  letter-spacing: 0.04em;
  margin-top: 6px;
  text-transform: uppercase;
  font-weight: 600;
}
.credito-img.is-hidden,
.fuente.is-hidden{ display: none; }

[data-show-favs].active{
  background: var(--accent-soft);
  border-color: var(--border-accent);
  color: var(--accent);
}

[data-cite-output].visible{ opacity: 1; }

#creditos-grid[aria-busy="true"]::after{
  content: "Cargando imágenes…";
  display: block;
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  font-style: italic;
}

select.search-input{
  appearance: none;
  -webkit-appearance: none;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--muted) 50%),
    linear-gradient(135deg, var(--muted) 50%, transparent 50%);
  background-position:
    calc(100% - 18px) calc(50% - 2px),
    calc(100% - 13px) calc(50% - 2px);
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 34px;
}

.biblio{
  list-style: none;
  padding: 0;
  margin: 24px 0;
  counter-reset: bib;
  display: grid;
  gap: 14px;
}
.biblio li{
  counter-increment: bib;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px 22px 18px 64px;
  position: relative;
  color: var(--text-2);
  font-size: 0.94rem;
  line-height: 1.6;
  transition: border-color var(--t-fast), background var(--t-fast);
}
.biblio li:hover{
  border-color: var(--border-accent);
  background: var(--surface-2);
}
.biblio li::before{
  content: counter(bib, decimal-leading-zero);
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 1.1rem;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.biblio li em{ color: var(--text); font-style: italic; }
.biblio li a{ color: var(--accent); overflow-wrap: anywhere; }

.gracias-panel{
  text-align: center;
  padding: 56px 32px;
  background:
    radial-gradient(circle at 50% 0%, rgba(77,208,225,0.08), transparent 60%),
    var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 48px 0 24px;
  position: relative;
  overflow: hidden;
}
.gracias-panel h2{
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin-bottom: 14px;
  color: var(--text);
}
.gracias-panel p{
  color: var(--text-2);
  max-width: 60ch;
  margin: 0 auto 24px;
  font-size: 1rem;
}

@media (max-width: 640px){
  .creditos-hero{ padding: 44px 0 32px; }
  .fuentes-grid, .creditos-img-grid{ grid-template-columns: 1fr; gap: 14px; }
  .fuente{ padding: 20px; }
  .biblio li{ padding: 16px 18px 16px 52px; font-size: 0.88rem; }
  .biblio li::before{ left: 16px; font-size: 0.95rem; }
}