.discovery-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; padding-bottom: 2.5rem; }
.discovery-heading h1 { margin-bottom: 1.2rem; }
.discovery-heading .muted { max-width: 39rem; }
.discovery-heading > .btn { flex-shrink: 0; margin-bottom: .5rem; }
.discovery-dot { color: var(--accent); }
.catalogue-search { border: 1px solid var(--line); padding: 1.5rem; border-radius: 14px; background: var(--surface); margin-bottom: 2.5rem; }
.catalogue-search > label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: .65rem; }
.catalogue-search-row { display: flex; gap: .75rem; }
.catalogue-search input { width: 100%; min-width: 0; background: var(--bg); color: var(--text); border: 1px solid var(--line); border-radius: 8px; padding: .95rem 1rem; font: inherit; }
.catalogue-search input::placeholder { color: var(--muted); opacity: 1; }
.catalogue-search-row .btn { flex-shrink: 0; }
.catalogue-search > p { font-size: .8rem; margin: .7rem 0 0; }
.discovery-layout { display: grid; grid-template-columns: 218px minmax(0, 1fr); gap: 2rem; align-items: start; }
.discovery-sidebar { padding: .4rem 0 1rem; }
.filter-title { display: flex; gap: .5rem; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.filter-title h2 { font-size: .86rem; margin: 0; }
.reset-filters { background: none; color: var(--accent); padding: .3rem; border: 0; font: inherit; font-size: .8rem; cursor: pointer; text-decoration: underline; text-underline-offset: 3px; }
.filter-field { margin-bottom: 1.4rem; }
.filter-field label { display: block; color: var(--muted); font-size: .8rem; margin-bottom: .5rem; }
.filter-field select, .sort-field select { font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--line); border-radius: 6px; padding: .65rem .5rem; max-width: 100%; }
.filter-field select { width: 100%; font-size: .86rem; }
.filter-explainer { font-size: .78rem; line-height: 1.65; color: var(--muted); padding-top: .5rem; }
.filter-trust-link { display: flex; gap: .5rem; justify-content: space-between; border-top: 1px solid var(--line); padding-top: 1rem; margin-top: 1rem; color: var(--accent); font-size: .83rem; }
.cost-key { margin-top: 1.1rem; font-size: .78rem; color: var(--muted); }
.cost-key summary { cursor: pointer; line-height: 1.6; }
.cost-key dt { font-weight: 700; color: var(--text); }
.cost-key dd { margin: .25rem 0 .85rem; line-height: 1.5; }
.catalogue-results-bar { display: flex; justify-content: space-between; gap: 1rem; align-items: center; min-height: 40px; margin-bottom: 1.1rem; }
.catalogue-results-bar > p { font-size: .86rem; margin: 0; font-variant-numeric: tabular-nums; }
.sort-field { display: flex; align-items: center; gap: .6rem; font-size: .8rem; }
.sort-field label { color: var(--muted); }
.sort-field select { padding: .45rem .5rem; }
.resource-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; list-style: none; padding: 0; margin: 0; }
.resource-card { border: 1px solid var(--line); border-radius: 10px; background: var(--surface); padding: 1.35rem; min-width: 0; display: flex; flex-direction: column; transition: border-color .15s ease; }
.resource-card:hover, .resource-card:focus-within { border-color: var(--accent); }
.resource-card-top { display: flex; align-items: center; justify-content: space-between; gap: .7rem; margin-bottom: 1.2rem; }
.resource-mark { display: grid; place-items: center; width: 38px; height: 38px; color: var(--accent); background: rgba(180, 160, 255, .09); border: 1px solid rgba(180, 160, 255, .22); border-radius: 8px; font-size: .7rem; font-weight: 700; letter-spacing: .02em; }
.resource-cost { display: inline-block; border: 1px solid var(--line); padding: .25rem .55rem; border-radius: 5px; color: var(--muted); font-size: .7rem; font-weight: 600; }
.resource-cost[data-cost="free"] { color: var(--lime); border-color: rgba(220, 249, 144, .23); background: rgba(220, 249, 144, .04); }
.resource-cost[data-cost="edu"] { color: var(--accent); }
.resource-card h2 { font-size: 1.08rem; line-height: 1.4; margin: 0 0 .25rem; overflow-wrap: anywhere; }
.resource-category { margin: 0 0 .8rem; font-size: .72rem; color: var(--accent); }
.resource-description { margin: 0 0 1.1rem; color: var(--muted); font-size: .86rem; line-height: 1.65; }
.resource-platforms { margin: auto 0 .75rem; font-size: .73rem; color: var(--text); line-height: 1.7; }
.resource-platforms span { color: var(--muted); }
.resource-tags { display: flex; flex-wrap: wrap; gap: .35rem; margin: 0 0 1.25rem; list-style: none; padding: 0; }
.resource-tags li { font-size: .67rem; padding: .15rem .45rem; border-radius: 4px; background: var(--bg); color: var(--muted); }
.resource-link { display: flex; justify-content: space-between; align-items: center; color: var(--text); text-decoration: none; font-size: .8rem; font-weight: 600; border-top: 1px solid var(--line); padding: .9rem 0 0; }
.resource-link:hover { color: var(--accent); }
.resource-link span { font-size: 1rem; color: var(--accent); }
.resource-details { margin-top: .8rem; font-size: .76rem; color: var(--muted); line-height: 1.65; }
.resource-details summary { cursor: pointer; padding: .2rem 0; }
.resource-details[open] summary { color: var(--text); margin-bottom: .7rem; }
.resource-details p { margin: .65rem 0; }
.resource-details strong { color: var(--text); font-weight: 600; }
.resource-details a { color: var(--accent); }
.catalogue-state { padding: 3rem 1.5rem; text-align: center; }
.catalogue-state h2 { font-size: 1.35rem; }
.catalogue-state p { color: var(--muted); max-width: 34rem; margin: .75rem auto 1.5rem; }
.loading-signal { display: inline-block; width: 24px; height: 24px; border: 2px solid var(--line); border-top-color: var(--accent); border-radius: 50%; animation: catalogue-spin .8s linear infinite; }
.catalogue-state:not([data-loading="true"]) .loading-signal { display: none; }
.catalogue-notice { border-left: 2px solid var(--accent); padding: .6rem .8rem; font-size: .8rem; color: var(--muted); }
.catalogue-bottom-note { border-top: 1px solid var(--line); margin: 3rem 0; padding-top: 1.25rem; display: flex; justify-content: space-between; gap: 2rem; font-size: .78rem; color: var(--muted); }
.catalogue-bottom-note p { max-width: 40rem; margin: 0; }
.catalogue-bottom-note a { color: var(--accent); flex-shrink: 0; }
.catalogue-noscript { padding: 1.5rem; }
#catalogue [hidden] { display: none !important; }
#catalogue :focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }
@keyframes catalogue-spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) { .loading-signal { animation: none; } .resource-card { transition: none; } }
@media (min-width: 1450px) { .resource-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }
@media (max-width: 920px) {
  .discovery-layout { grid-template-columns: 180px minmax(0, 1fr); gap: 1.25rem; }
  .discovery-heading { align-items: start; flex-direction: column; gap: .5rem; }
  .resource-card { padding: 1rem; }
  .filter-title { flex-wrap: wrap; }
}
@media (max-width: 720px) {
  .discovery-layout { display: block; }
  .discovery-sidebar { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .75rem; margin-bottom: 1rem; padding: 0; }
  .filter-title { grid-column: 1 / -1; margin: 0; }
  .filter-field { margin-bottom: 0; }
  .filter-explainer { grid-column: 1 / -1; margin: 0; padding: .25rem 0; }
  .filter-trust-link { grid-column: 1 / -1; margin: 0; padding-top: .7rem; justify-content: start; }
  .cost-key { grid-column: 1 / -1; margin: 0 0 .7rem; }
  .catalogue-search { padding: 1rem; margin-bottom: 1.5rem; }
  .catalogue-search-row { flex-direction: column; }
  .catalogue-search-row .btn { align-self: flex-start; }
  .catalogue-bottom-note { flex-direction: column; gap: .8rem; }
}
@media (max-width: 480px) {
  .resource-grid { grid-template-columns: 1fr; }
  .discovery-sidebar { grid-template-columns: 1fr; }
  .filter-field { display: grid; grid-template-columns: 95px minmax(0, 1fr); align-items: center; gap: .5rem; }
  .filter-field label { margin: 0; }
  .catalogue-results-bar { flex-wrap: wrap; }
}