/* Radford Mathematics – Worksheet Book Sidebar (page-scoped, 2026-11-01)
   Upload: /assets/css/worksheet-book-sidebar.css
   Never modify global notes sidebar rules here. */
.rm-worksheets-page,.rm-worksheets-page *{box-sizing:border-box}
.rm-worksheets-page{min-width:0}
.rm-worksheets-page .rm-work-library{
  display:grid;grid-template-columns:minmax(0,1fr) minmax(264px,300px);
  gap:24px;align-items:start;min-width:0;
}
.rm-worksheets-page .rm-work-library-results{min-width:0}
.rm-worksheets-page .rm-work-library-results .rm-resource-grid{
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.rm-worksheets-page .rm-work-library-results .rm-resource-result{
  min-width:0;overflow-wrap:break-word;
}
.rm-worksheets-page .rm-work-books-sidebar{
  position:sticky;top:84px;align-self:start;min-width:0;
  border-radius:18px;background:#fff;border:1px solid #d6e1ee;
  overflow:hidden;box-shadow:0 9px 28px rgba(23,47,77,.08);
  color:#243344;
}
.rm-worksheets-page .rm-work-books-heading{
  padding:19px 19px 16px;border-bottom:1px solid #e1e8ef;
  background:linear-gradient(145deg,#f0f4f7,#fff);
}
.rm-worksheets-page .rm-work-books-kicker{
  margin:0 0 8px;color:#617285;font-size:10px;font-weight:850;
  letter-spacing:.12em;text-transform:uppercase;
}
.rm-worksheets-page .rm-work-books-heading h2{
  font-size:22px;line-height:1.1;letter-spacing:-.025em;margin:0 0 7px;color:#243848;
}
.rm-worksheets-page .rm-work-books-heading>p:not(.rm-work-books-kicker){
  font-size:13px;line-height:1.45;color:#56677b;margin:0 0 12px;
}
.rm-worksheets-page .rm-work-books-format{
  font-size:11px;font-weight:750;color:#536779;
}
.rm-worksheets-page .rm-work-book-list{
  display:flex;flex-direction:column;gap:0;min-width:0;
}
.rm-worksheets-page .rm-work-book-card{
  --rm-book-accent:#496b83;
  display:grid;grid-template-columns:66px minmax(0,1fr);
  align-items:start;gap:12px;min-width:0;padding:15px 18px;
  border-bottom:1px solid #e5eaf0;transition:background .18s ease;
  background:#fff;
}
.rm-worksheets-page .rm-work-book-ai-sl{--rm-book-accent:#21805d}
.rm-worksheets-page .rm-work-book-aa-sl{--rm-book-accent:#21609e}
.rm-worksheets-page .rm-work-book-aa-hl{--rm-book-accent:#765597}
.rm-worksheets-page .rm-work-book-card.is-match{
  background:linear-gradient(90deg,color-mix(in srgb,var(--rm-book-accent) 7%,white),white 80%);
  box-shadow:inset 3px 0 var(--rm-book-accent);
}
.rm-worksheets-page .rm-work-book-cover-link{
  width:66px;aspect-ratio:1055/1491;display:block;position:relative;
  border-radius:5px;overflow:hidden;border:1px solid #d9dee6;
  box-shadow:0 3px 8px rgba(19,33,58,.14);
  background:var(--rm-book-accent);text-decoration:none;color:#fff;
}
.rm-worksheets-page .rm-work-cover-fallback{
  display:flex;position:absolute;inset:0;flex-direction:column;gap:7px;
  padding:8px 7px;justify-content:space-between;color:#fff;
  background:linear-gradient(135deg,var(--rm-book-accent),#283d4c);
  font-size:8px;letter-spacing:.06em;line-height:1.1;
}
.rm-worksheets-page .rm-work-cover-fallback b{font-size:16px;letter-spacing:0}
.rm-worksheets-page .rm-work-cover-fallback small{font-size:9px;line-height:1.2;font-weight:800}
.rm-worksheets-page .rm-work-book-cover-link img{
  position:relative;display:block;object-fit:cover;width:100%;height:100%;max-width:100%;
}
.rm-worksheets-page .rm-work-book-copy{min-width:0}
.rm-worksheets-page .rm-work-book-course-line{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-bottom:5px}
.rm-worksheets-page .rm-work-book-course{
  color:var(--rm-book-accent);font-weight:900;font-size:10px;letter-spacing:.05em;
}
.rm-worksheets-page .rm-work-book-match{
  display:none;color:var(--rm-book-accent);font-size:10px;font-weight:800;
}
.rm-worksheets-page .rm-work-book-card.is-match .rm-work-book-match{display:inline}
.rm-worksheets-page .rm-work-book-copy h3{
  font-size:15px;line-height:1.15;letter-spacing:-.01em;margin:0 0 5px;
  font-weight:850;color:#243344;
}
.rm-worksheets-page .rm-work-book-copy p{
  font-size:12px;line-height:1.35;margin:0 0 8px;color:#516172;
}
.rm-worksheets-page .rm-work-book-link{
  display:inline-flex;align-items:center;gap:5px;min-height:28px;
  text-decoration:none;font-size:12px;line-height:1.25;font-weight:850;
  color:var(--rm-book-accent);border-bottom:1px solid transparent;
}
.rm-worksheets-page .rm-work-book-link:hover,
.rm-worksheets-page .rm-work-book-link:focus-visible{
  text-decoration:underline;
}
.rm-worksheets-page .rm-work-books-bottom{
  padding:15px 18px 17px;background:#f8fafc;
}
.rm-worksheets-page .rm-work-books-more{
  display:block;border-radius:8px;background:#34464d;color:#fff;
  padding:11px 12px;text-align:center;text-decoration:none;
  font-size:12px;line-height:1.25;font-weight:850;
}
.rm-worksheets-page .rm-work-books-more:hover{background:#25383f;color:#fff}
.rm-worksheets-page .rm-work-books-bottom p{
  margin:10px 0 0;font-size:10px;line-height:1.45;color:#647588;text-align:center;
}
.rm-worksheets-page .rm-work-mobile-promo{display:none}
.rm-worksheets-page .rm-visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.rm-worksheets-page .rm-work-books-sidebar a:focus-visible,
.rm-worksheets-page .rm-work-mobile-promo a:focus-visible{
  outline:3px solid #1d63c0;outline-offset:3px;
}
@media(max-width:1160px){
  .rm-worksheets-page .rm-work-library-results .rm-resource-grid{grid-template-columns:minmax(0,1fr)}
}
@media(max-width:830px){
  .rm-worksheets-page .rm-work-library{grid-template-columns:minmax(0,1fr);gap:20px}
  .rm-worksheets-page .rm-work-books-sidebar{position:static}
  .rm-worksheets-page .rm-work-book-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}
  .rm-worksheets-page .rm-work-book-card{grid-template-columns:60px minmax(0,1fr);border-right:1px solid #e5eaf0;padding:14px;gap:10px}
  .rm-worksheets-page .rm-work-book-cover-link{width:60px}
  .rm-worksheets-page .rm-work-mobile-promo{
    display:flex;align-items:center;justify-content:space-between;gap:15px;
    margin:10px 0 16px;padding:13px 16px;border:1px solid #cbd9e7;
    background:#f8fafc;border-radius:12px;
  }
  .rm-worksheets-page .rm-work-mobile-promo p{margin:3px 0 0;font-size:12px;color:#526579;line-height:1.35}
  .rm-worksheets-page .rm-work-mobile-promo strong{font-size:14px;color:#243848}
  .rm-worksheets-page .rm-work-mobile-promo a{
    flex:0 0 auto;white-space:nowrap;border-radius:8px;padding:9px 11px;
    background:#34464d;color:#fff;font-size:12px;text-decoration:none;font-weight:800;
  }
}
@media(max-width:660px){
  .rm-worksheets-page .rm-work-book-list{grid-template-columns:minmax(0,1fr)}
  .rm-worksheets-page .rm-work-book-card{grid-template-columns:66px minmax(0,1fr);border-right:0}
  .rm-worksheets-page .rm-work-book-cover-link{width:66px}
}
@media(max-width:460px){
  .rm-worksheets-page .rm-work-mobile-promo{align-items:stretch;flex-direction:column;gap:9px}
  .rm-worksheets-page .rm-work-mobile-promo a{text-align:center}
}
@media(prefers-reduced-motion:reduce){
  .rm-worksheets-page .rm-work-book-card{transition:none}
}