/* ==========================================================
   Resources (worksheets, lesson plans, classroom activities)
   Public index + single page, plus the admin form which reuses
   the tokens from app.css. Mobile first. v0.7 refresh.
   ========================================================== */

.page-head { margin-block: 1.5rem 1rem; }
.page-head h1 { margin: 0 0 .35rem; }
.page-head .lead { margin: 0; }

/* ---- filters ---- */
.resource-filters {
  position: relative; z-index: 2; display: grid; gap: .75rem; margin: -2.2rem 0 1.75rem; padding: 1rem;
  background: #fff; border: 2px solid var(--c-green-dd); border-radius: 22px; box-shadow: var(--shadow-hard), var(--shadow-lift);
}
.resource-filters .field { margin: 0; }
.resource-filters label { margin: 0 0 .3rem; font-size: .82rem; color: var(--c-muted); }
.resource-filters select, .resource-filters input { background-color: var(--c-bg); min-height: 46px; }
.resource-filters select:focus, .resource-filters input:focus { background-color: #fff; }
.resource-filters-actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: end; }
.resource-filters-actions .btn { min-height: 46px; }

/* ---- card grid ---- */
.resource-grid { display: grid; gap: 1.25rem; grid-template-columns: 1fr; margin-block: 1.25rem; }
.resource-card {
  position: relative; display: flex; flex-direction: column; overflow: hidden;
  background: var(--c-surface); border: 1px solid var(--c-border);
  border-radius: 22px; box-shadow: var(--shadow);
  transition: transform .35s var(--spring), box-shadow .35s var(--ease), border-color .2s ease;
}
.resource-card:hover { transform: translateY(-6px); border-color: var(--c-border-strong); box-shadow: var(--shadow-lift); }
.resource-card-media { display: block; aspect-ratio: 16/10; background: var(--c-bg); overflow: hidden; }
.resource-card-media img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .6s var(--ease); }
.resource-card:hover .resource-card-media img { transform: scale(1.06); }
.resource-card-placeholder {
  position: relative; display: flex; width: 100%; height: 100%; flex-direction: column;
  align-items: center; justify-content: center; gap: .4rem;
  background-color: #e8f1fb;
  background-image: repeating-linear-gradient(to bottom, transparent 0 21px, rgba(59, 134, 207, .16) 21px 22px);
}
.resource-card-icon {
  display: grid; place-items: center; width: 74px; height: 92px; font-size: 2.2rem; line-height: 1;
  background: #fff; border: 2px solid var(--c-green-dd); border-radius: 10px 26px 10px 10px; box-shadow: var(--shadow-hard-sm);
  transform: rotate(-4deg); transition: transform .4s var(--spring);
}
.resource-card:hover .resource-card-icon { transform: rotate(3deg) scale(1.05); }
.resource-card-ext {
  font-size: .78rem; font-weight: 900; letter-spacing: .06em; color: #fff;
  background: var(--c-berry); border-radius: 6px; padding: .05rem .55rem; direction: ltr;
}
.resource-card-body { display: flex; flex-direction: column; gap: .5rem; padding: 1rem 1.1rem 1.1rem; flex: 1; }
.resource-card-chips { display: flex; gap: .3rem; flex-wrap: wrap; margin: 0; }
.resource-card-chips .chip { font-size: .78rem; }
.resource-card-title { font-size: 1.1rem; margin: 0; line-height: 1.6; }
.resource-card-title a { color: inherit; text-decoration: none; }
.resource-card-title a:hover { color: var(--c-green-dd); }
.resource-card-excerpt {
  margin: 0; font-size: .92rem; color: var(--c-muted); line-height: 1.85;
  display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.resource-card-actions { display: flex; gap: .5rem; flex-wrap: wrap; margin-block-start: auto; padding-top: .75rem; border-top: 1px dashed var(--c-border); }
.resource-card-actions .btn { flex: 1; min-height: 42px; padding-inline: .9rem; font-size: .92rem; }
.resource-card-date { margin: 0; font-size: .82rem; }

/* ---- single page ---- */
.resource-hero h1 { max-width: 28ch; }
.resource-facts { display: flex; gap: .35rem; flex-wrap: wrap; margin: .6rem 0 0; }
.resource-detail { display: grid; gap: 1.5rem; margin: -2rem 0 2rem; position: relative; z-index: 2; }
.resource-detail-main { min-width: 0; background: #fff; border: 1px solid var(--c-border); border-radius: 26px; box-shadow: var(--shadow); padding: clamp(1.1rem, 4vw, 2rem); }
.resource-detail-media { margin: 0 0 1.25rem; }
.resource-detail-media img {
  width: 100%; height: auto; display: block;
  border-radius: 18px; border: 1px solid var(--c-border);
}
.resource-actions { display: flex; gap: .6rem; flex-wrap: wrap; margin-block: 0 1.25rem; }
.resource-description { max-width: 70ch; line-height: 2.05; font-size: 1.04rem; }
.resource-side-title { font-size: 1.05rem; margin: 0 0 .75rem; }
.resource-detail-side .card { border-radius: 22px; margin: 0; }
.resource-detail-side .kv { display: grid; grid-template-columns: auto 1fr; gap: .5rem .9rem; margin: 0; }
.resource-detail-side dt { color: var(--c-muted); font-size: .86rem; font-weight: 700; }
.resource-detail-side dd { margin: 0; font-weight: 800; font-size: .92rem; }
.resource-detail-side dd time { font-weight: 800; }
.resource-side-cta { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--c-border); }
.resource-side-cta .btn { width: 100%; }
.resource-similar { margin-top: 2.5rem; }

/* ---- admin ---- */
.admin-filter .field { margin: 0; }
.resource-preview-hint { font-size: .9rem; color: var(--c-muted); }

/* ---- tablet and up ---- */
@media (min-width: 640px) {
  .resource-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 768px) {
  .resource-filters { grid-template-columns: 2fr 1fr 1fr 1fr auto; align-items: end; }
  .resource-detail { grid-template-columns: minmax(0, 1fr) 300px; align-items: start; }
  .resource-detail-side { position: sticky; top: calc(var(--header-h) + 1rem); }
}
@media (min-width: 1024px) {
  .resource-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (min-width: 1600px) {
  .resource-grid { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 767px) {
  .resource-filters { margin-top: -1.75rem; }
}