:root{
  --bg:#282828;
  --ink:#ffffff;
  --muted:#cfcfcf;
  --card:#2f2f2f;
  --cardHover:#353535;
  --radius:10px;             /* ← esquinas redondeadas ajustadas */
  --skeleton:#3a3a3a;
  --skeleton-hi:#444444;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  min-height:100svh;
  background:var(--bg);
  color:var(--ink);
  font:16px/1.45 system-ui,-apple-system,Segoe UI,Roboto,Inter,Arial,sans-serif;
}

/* wrapper centrado vertical+horizontal */
.page{
  min-height:100svh;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  padding:24px;
  gap:50px; /* ← separación logo - grilla */
}

.site-header{ 
  display:flex; 
  justify-content:center; 
  align-items:center; 
}
.site-logo{ 
  height:90px; /* ← altura fija */
  width:auto; 
  opacity:.95; 
}

/* grid centrada y fluida */
.container{
  width:min(1100px,100%);
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(180px, 1fr));
  gap:16px;
  place-items:center;
}

/* Animación de entrada */
@keyframes fadeIn {
  to { opacity:1; transform:translateY(0); }
}

/* Card vertical */
.link-card{
  width:100%;
  max-width:260px;
  background:var(--card);
  border-radius:var(--radius);
  overflow:hidden;
  outline:none;
  opacity:0;
  transform:translateY(6px);
  animation:fadeIn .45s ease forwards;
  animation-delay:calc(var(--i,0) * 60ms);
}
.link-card:hover,
.link-card:focus-visible{ background:var(--cardHover); }

/* área media con ratio 3:4 + skeleton */
.media{
  position:relative;
  width:100%;
  aspect-ratio:3/4;
  background:var(--skeleton);
  overflow:hidden;
}

/* shimmer */
.media::before{
  content:"";
  position:absolute; inset:0;
  background:linear-gradient(90deg, transparent 0%, var(--skeleton-hi) 50%, transparent 100%);
  transform:translateX(-100%);
  animation:shimmer 1.3s infinite;
  opacity:.6;
}
@keyframes shimmer{
  0%{ transform:translateX(-100%); }
  100%{ transform:translateX(100%); }
}

/* imagen */
.thumb{
  position:absolute; inset:0;
  width:100%; height:100%;
  object-fit:cover;
  opacity:0;
  transition:opacity .35s ease;
}
.media.loaded .thumb{ opacity:1; }
.media.loaded::before{ display:none; }

/* overlay inferior */
.overlay{
  position:absolute; left:0; right:0; bottom:0;
  padding:10px 12px;
  display:flex; align-items:center; justify-content:center;
  text-align:center;
  color:#fff;
  font-size:13px;
  line-height:1.35;
  background:linear-gradient(to top, rgba(0,0,0,.62), rgba(0,0,0,.25), rgba(0,0,0,0));
  transform:translateY(100%);
  opacity:0;
  transition:transform .22s ease, opacity .22s ease;
}
.link-card:hover .overlay,
.link-card:focus-within:not(.noclick) .overlay{
  transform:translateY(0);
  opacity:1;
}
.overlay .text{
  display:-webkit-box;
  -webkit-line-clamp:3;
  -webkit-box-orient:vertical;
  overflow:hidden;
}

/* accesibilidad foco */
.link-card:focus-visible{ box-shadow:0 0 0 3px rgba(255,255,255,.18); }

/* responsive */
@media (max-width:900px){
  .container{ grid-template-columns:repeat(auto-fit, minmax(160px, 1fr)); gap:14px; }
  .link-card{ max-width:230px; }
}
@media (max-width:560px){
  .page{ padding:18px; gap:50px; } /* mantiene separación */
  .site-logo{ height:90px; }
  .container{ grid-template-columns:repeat(2, minmax(0, 1fr)); gap:12px; }
}
@media (max-width:380px){
  .container{ grid-template-columns:1fr; }
  .link-card{ max-width:300px; }
}


/* === Restore grayscale default on thumbnails === */
.link-card .media img.thumb{
  filter: grayscale(100%);
  transition: filter .35s ease;
}
/* Color only on hover and on focus for clickable cards */
.link-card:hover .media img.thumb,
.link-card:focus-within:not(.noclick) .media img.thumb{
  filter: none;
}