/* RTL base */
.rsb-purchase-box, .rsb-specs, .rsb-search, .rsb-mybooks, .rsb-reader-wrap { direction: rtl; }
.rsb-purchase-box { border:1px solid #e5e7eb; padding:16px; border-radius:8px; margin:16px 0; background:#fff; }
.rsb-purchase-box fieldset { border:0; margin:0 0 12px; padding:0; }
.rsb-purchase-box legend { font-weight:600; margin-bottom:8px; }
.rsb-radio { display:flex; align-items:center; gap:8px; padding:10px 12px; border:1px solid #e5e7eb; border-radius:8px; margin-bottom:8px; background:#fafafa; }
.rsb-radio input[type=radio] { margin:0 0 0 8px; }
.rsb-radio .price { margin-right:auto; font-weight:700; }
.rsb-radio.rsb-package { background:#f0f9ff; border-color:#bae6fd; }
.rsb-stock { color:#16a34a; font-size:12px; margin-right:8px; }
.rsb-out { color:#dc2626; font-size:12px; margin-right:8px; }

.rsb-specs-wrap { margin-top:16px; }
.rsb-specs { width:100%; border-collapse:collapse; }
.rsb-specs th, .rsb-specs td { border:1px solid #e5e7eb; padding:8px 10px; }
.rsb-specs th { width:160px; background:#f9fafb; text-align:right; }

/* Search */
.rsb-search { border:1px solid #e5e7eb; padding:16px; border-radius:8px; margin:24px 0; }
.rsb-search-form { display:grid; grid-template-columns: 1fr auto; gap:12px; }
.rsb-search-form input[name=q] { grid-column:1 / span 2; padding:10px 12px; border:1px solid #e5e7eb; border-radius:6px; }
.rsb-search-filters { grid-column:1 / span 2; display:grid; grid-template-columns: repeat(3, 1fr); gap:8px; }
.rsb-search-filters input { padding:8px 10px; border:1px solid #e5e7eb; border-radius:6px; }
.rsb-search .button { padding:10px 16px; border-radius:6px; }
.rsb-grid { display:grid; grid-template-columns: repeat( auto-fill, minmax(180px,1fr) ); gap:16px; margin-top:16px; }
.rsb-card { display:block; border:1px solid #e5e7eb; border-radius:10px; padding:10px; text-decoration:none; color:inherit; background:#fff; transition:transform .1s ease, box-shadow .1s ease; }
.rsb-card:hover { transform:translateY(-2px); box-shadow:0 6px 12px rgba(0,0,0,0.06); }
.rsb-thumb { width:100%; aspect-ratio: 3/4; object-fit:cover; border-radius:6px; background:#f3f4f6; }
.rsb-thumb.placeholder { display:block; }
.rsb-min-price { margin-top:6px; font-weight:700; }

/* My Books */
.rsb-mybooks { border:1px solid #e5e7eb; padding:16px; border-radius:8px; background:#fff; }
.rsb-mybooks-list { list-style:none; margin:8px 0 0; padding:0; }
.rsb-mybook-item { display:flex; align-items:center; justify-content:space-between; padding:10px 0; border-bottom:1px dashed #e5e7eb; }
.rsb-mybook-item:last-child { border-bottom:0; }
.rsb-mybook-title { font-weight:600; }
.rsb-mybook-file { color:#6b7280; margin:0 8px; }
.rsb-mybook-item .button { border-radius:6px; padding:8px 12px; }

@media (max-width:600px){
  .rsb-search-filters { grid-template-columns: 1fr 1fr; }
}


/* --- Mobile responsiveness improvements (added) --- */
@media (max-width: 768px){
  .rsb-search-form{grid-template-columns: 1fr; }
  .rsb-search-filters{grid-template-columns: 1fr 1fr; }
}
@media (max-width: 500px){
  .rsb-grid{ grid-template-columns: 1fr; }
  .rsb-card{ padding: 12px; }
  .rsb-mybook-item{ flex-direction: column; align-items: flex-start; gap: 10px; }
}