html,body{margin:0}
.libros-wrap{max-width:1100px;margin:12px auto;padding:0 12px}
.libros-header{display:flex;gap:12px;align-items:center;margin-bottom:10px}
.libros-header h2{margin:0;font:600 18px/1.2 system-ui,Segoe UI,Roboto,sans-serif}
.libros-header input{flex:1;min-width:240px;border:1px solid #d5d9e2;border-radius:10px;padding:8px 10px}
.libros-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.libro-card{border:1px solid #e6e8f0;border-radius:12px;overflow:hidden;background:#fff;display:flex;flex-direction:column}
a.libro-card{color:inherit;text-decoration:none;cursor:pointer}
.libro-card:hover{box-shadow:0 4px 18px rgba(2,8,23,.08)}
.libro-card:focus{outline:2px solid #2563eb; outline-offset:2px}
.libro-cover{position:relative;height:180px;background:#f4f6fb;display:flex;align-items:center;justify-content:center;color:#94a3b8;font: 700 28px/1 system-ui,Segoe UI,Roboto,sans-serif}
.libro-cover img{width:100%;height:100%;object-fit:cover;display:block}
.pdf-badge{position:absolute;right:8px;top:8px;background:#ef4444;color:#fff;border-radius:999px;font:600 11px/1 system-ui,Segoe UI,Roboto,sans-serif;padding:4px 8px;box-shadow:0 1px 2px rgba(0,0,0,.2)}
.libro-body{padding:10px;display:flex;flex-direction:column;gap:6px}
.libro-title{font:600 14px/1.2 system-ui,Segoe UI,Roboto,sans-serif;margin:0}
.libro-author{color:#64748b;font: 13px/1.2 system-ui,Segoe UI,Roboto,sans-serif}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{border:1px solid #e6e8f0;border-radius:999px;padding:2px 6px;font-size:12px;color:#64748b}
.empty{padding:16px;border:1px dashed #e2e8f0;border-radius:12px;color:#64748b;text-align:center}