:root { --bg:#0f172a; --fg:#e2e8f0; --card:#111827; }
*{box-sizing:border-box}
body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Arial,sans-serif;background:var(--bg);color:var(--fg)}
.header{padding:24px 16px;text-align:center}
.header h1{margin:0;font-size:clamp(20px,3.2vw,32px)}
.container{max-width:1100px;margin:0 auto;padding:16px}
.grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.card{background:var(--card);border-radius:16px;box-shadow:0 8px 24px rgba(0,0,0,.4);
      overflow:hidden;border:1px solid rgba(255,255,255,.06);transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);box-shadow:0 16px 28px rgba(0,0,0,.55)}
.card img{display:block;width:100%;height:auto}
.caption{padding:10px 14px;font-size:14px;color:#cbd5e1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
         border-top:1px solid rgba(255,255,255,.06)}
.empty{padding:40px;text-align:center;border:1px dashed rgba(255,255,255,.2);border-radius:12px;color:#cbd5e1}
.footer{text-align:center;opacity:.7;padding:18px;font-size:13px}

a {
  text-decoration: none;
}
@media (max-width:640px){ .grid{grid-template-columns:repeat(2,minmax(0,1fr))} } /* 2 columnas siempre */