/* ==========================================================================
   Merit Study Resources — resource page
   Loaded after style.css; reuses its tokens. Sections:
   1. Page shell  2. Course header  3. Tabs  4. Filter rail
   5. Panes & rows  6. Topic accordion  7. Study route  8. Responsive
   ========================================================================== */

/* 1. Page shell --------------------------------------------------------- */
.page-resources {
  --page-bg: #f8faf8;
  --card-border: #e5ebe7;
  background: var(--page-bg);
}
.page-resources main { padding-bottom: 3rem; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 0 0 .6rem;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--merit-dark-green);
}
.eyebrow-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--merit-green);
}
.eyebrow-sep { color: #b6c6bd; }

/* 2. Course header ------------------------------------------------------ */
.course-header {
  background: #fff;
  border-bottom: 1px solid var(--card-border);
  padding: 1.25rem 0 2rem;
}

.course-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.course-crumbs {
  margin: 0;
  --bs-breadcrumb-divider: '›';
  font-size: .85rem;
}
.course-crumbs .breadcrumb-item + .breadcrumb-item::before { color: #b6c6bd; }
.course-crumbs a { color: var(--merit-muted); font-weight: 500; }
.course-crumbs a:hover { color: var(--merit-dark-green); text-decoration: none; }
.course-crumbs .breadcrumb-item.active { color: var(--merit-navy); font-weight: 600; }
.spec-code { margin: 0; font-size: .85rem; color: var(--merit-muted); }
.spec-code span { font-weight: 600; color: var(--merit-navy); }

.course-header-main {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}
.course-title {
  font-size: clamp(1.75rem, 1.1rem + 2vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -.03em;
  margin: 0 0 .75rem;
}
.course-title-board { color: var(--merit-green); }
.course-intro {
  max-width: 44rem;
  font-size: 1rem;
  line-height: 1.6;
  color: #4a5f70;
  margin-bottom: 1.1rem;
}

.course-chips { display: flex; flex-wrap: wrap; gap: .45rem; margin: 0; }
.course-chip {
  padding: .3rem .75rem;
  border: 1px solid var(--card-border);
  border-radius: var(--radius-pill);
  background: #fff;
  font-size: .82rem;
  font-weight: 600;
  color: var(--merit-navy);
}
.course-chip-tier {
  background: var(--merit-light-green);
  border-color: #cfe5d8;
  color: var(--merit-dark-green);
}

.course-actions { display: flex; gap: .5rem; flex-wrap: wrap; }
.btn-outline-merit {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  border: 1px solid #cfe5d8;
  background: var(--merit-light-green);
  color: var(--merit-dark-green);
  font-weight: 600;
  font-size: .87rem;
  border-radius: var(--radius-sm);
  padding: .55rem 1rem;
  min-height: 40px;
  transition: background var(--ease), border-color var(--ease);
}
.btn-outline-merit:hover {
  background: #e2f1e8;
  border-color: var(--merit-green);
  color: var(--merit-dark-green);
  text-decoration: none;
}

/* 3. Resource type tabs ------------------------------------------------- */
.resource-tabs-bar {
  position: sticky;
  top: 0;
  z-index: 1020;
  background: rgba(255, 255, 255, .96);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--card-border);
}
.resource-tabs {
  flex-wrap: nowrap;
  overflow-x: auto;
  gap: .25rem;
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.resource-tabs::-webkit-scrollbar { display: none; }
.resource-tabs .nav-link {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  border: 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
  padding: .95rem .9rem;
  color: var(--merit-muted);
  font-size: .9rem;
  font-weight: 600;
  letter-spacing: -.01em;
  white-space: nowrap;
  background: none;
  transition: color var(--ease), border-color var(--ease);
}
.resource-tabs .nav-link i { font-size: 1rem; opacity: .85; }
.resource-tabs .nav-link:hover { color: var(--merit-navy); }
.resource-tabs .nav-link.active {
  color: var(--merit-dark-green);
  border-bottom-color: var(--merit-green);
  background: none;
}

/* 4. Filter rail -------------------------------------------------------- */
.resource-body { padding-top: 1.75rem; }

.filter-rail {
  position: sticky;
  top: 4.5rem;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem;
}
.filter-search { margin-bottom: 1.1rem; }
.search-shell-sm { padding: .2rem .2rem .2rem .75rem; }
.search-shell-sm .search-input { font-size: .88rem; padding: .4rem 0; }

.filter-block { padding: 1rem 0; border-top: 1px solid var(--merit-line); }
.filter-heading {
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: .11em;
  text-transform: uppercase;
  color: var(--merit-muted);
  margin-bottom: .7rem;
}
.filter-options { display: grid; gap: .45rem; }
.filter-rail .form-check { margin: 0; min-height: 26px; }
.filter-rail .form-check-input { margin-top: .22rem; border-color: #c8d5cd; }
.filter-rail .form-check-input:checked {
  background-color: var(--merit-green);
  border-color: var(--merit-green);
}
.filter-rail .form-check-input:focus {
  border-color: var(--merit-green);
  box-shadow: 0 0 0 3px rgba(22, 138, 69, .12);
}
.filter-rail .form-check-label {
  font-size: .875rem;
  color: var(--merit-text);
  cursor: pointer;
}
.filter-count {
  float: right;
  font-size: .78rem;
  color: var(--merit-muted);
}
.filter-rail .btn-soft { margin-top: 1rem; justify-content: center; }
.filter-note {
  margin: .85rem 0 0;
  font-size: .76rem;
  line-height: 1.45;
  color: var(--merit-muted);
}

/* 5. Panes & resource rows ---------------------------------------------- */
.pane-head { margin-bottom: 1.1rem; }
.pane-head-spaced { margin-top: 2.25rem; }
.pane-title { font-size: 1.2rem; font-weight: 700; margin: 0 0 .2rem; }
.pane-sub { margin: 0; font-size: .9rem; color: var(--merit-muted); }
.pane-note {
  margin: 1rem 0 0;
  font-size: .8rem;
  color: var(--merit-muted);
}

/* summary cards on the "All resources" pane */
.type-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  width: 100%;
  height: 100%;
  text-align: left;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 1.1rem 1.05rem;
  transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
}
.type-card:hover {
  transform: translateY(-2px);
  border-color: #cfdcd4;
  box-shadow: var(--shadow-sm);
}
.type-name { font-weight: 700; color: var(--merit-navy); font-size: .98rem; margin-bottom: .2rem; }
.type-meta { font-size: .82rem; color: var(--merit-muted); line-height: 1.45; padding-right: 1.5rem; }
.type-go {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  color: var(--merit-green);
  font-size: .85rem;
  transition: transform var(--ease);
}
.type-card:hover .type-go { transform: translateX(3px); }

/* resource rows */
.resource-list { display: grid; gap: .6rem; margin: 0; }
.resource-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: .9rem 1rem;
  transition: border-color var(--ease), box-shadow var(--ease);
}
.resource-row:hover { border-color: #cfdcd4; box-shadow: var(--shadow-sm); }
.resource-row[hidden] { display: none; }

.row-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex: none;
  border-radius: 10px;
  background: var(--tint-sky);
  color: var(--ink-blue);
  font-size: 1.15rem;
}
.row-icon-merit { background: #f6f1e8; color: #a07423; }
.row-icon-note { background: var(--tint-periwinkle); color: var(--merit-navy); }
.row-icon-green { background: var(--tint-mint); color: var(--merit-green); }
.row-icon-purple { background: var(--tint-lilac); color: var(--ink-purple); }
.row-icon-teal { background: var(--tint-sage); color: var(--ink-teal); }
.row-icon-amber { background: var(--tint-cream); color: var(--ink-amber); }

.row-body { flex: 1 1 auto; min-width: 0; }
.row-eyebrow {
  margin: 0 0 .15rem;
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--merit-muted);
}
.row-eyebrow-merit { color: #a07423; }
.row-title { font-size: .98rem; font-weight: 700; margin: 0 0 .15rem; letter-spacing: -.015em; }
.row-meta { margin: 0; font-size: .82rem; color: var(--merit-muted); }

.row-actions { display: flex; gap: .4rem; flex: none; flex-wrap: wrap; justify-content: flex-end; }
.row-actions .btn-sm { min-height: 38px; padding: .45rem 1rem; font-size: .85rem; }

/* 6. Topic accordion ---------------------------------------------------- */
.topic-accordion {
  --bs-accordion-border-color: var(--card-border);
  --bs-accordion-border-radius: var(--radius);
  --bs-accordion-inner-border-radius: var(--radius);
  --bs-accordion-btn-focus-box-shadow: 0 0 0 3px rgba(22, 138, 69, .12);
  --bs-accordion-active-bg: #fff;
  --bs-accordion-active-color: var(--merit-navy);
  display: grid;
  gap: .6rem;
}
.topic-accordion .accordion-item {
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}
.topic-accordion .accordion-button {
  font-weight: 700;
  font-size: .98rem;
  color: var(--merit-navy);
  padding: 1rem 1.1rem;
  background: #fff;
}
.topic-accordion .accordion-button:not(.collapsed) {
  box-shadow: none;
  border-bottom: 1px solid var(--merit-line);
}
.topic-accordion .accordion-button::after {
  width: .95rem;
  height: .95rem;
  background-size: .95rem;
}
.topic-count {
  margin-left: auto;
  margin-right: .85rem;
  font-size: .78rem;
  font-weight: 500;
  color: var(--merit-muted);
}
.topic-accordion .accordion-body { padding: .6rem .75rem 1rem; }

.topic-list { display: grid; gap: .1rem; margin: 0; }
.topic-item[hidden] { display: none; }
.topic-item a {
  display: flex;
  align-items: center;
  gap: .65rem;
  padding: .6rem .65rem;
  border-radius: var(--radius-sm);
  color: var(--merit-text);
  font-size: .9rem;
  transition: background var(--ease), color var(--ease);
}
.topic-item a:hover {
  background: var(--merit-light-green);
  color: var(--merit-dark-green);
  text-decoration: none;
}
.topic-dot {
  width: 14px;
  height: 14px;
  flex: none;
  border: 2px solid #ccd9d1;
  border-radius: 50%;
  transition: border-color var(--ease), background var(--ease);
}
.topic-item a:hover .topic-dot { border-color: var(--merit-green); background: rgba(22, 138, 69, .15); }
.topic-tag {
  margin-left: auto;
  font-size: .76rem;
  color: var(--merit-muted);
  white-space: nowrap;
}
.topic-tag.higher-only {
  padding: .1rem .5rem;
  border-radius: var(--radius-pill);
  background: var(--tint-lilac);
  color: var(--ink-purple);
  font-weight: 600;
}

/* 7. Study route & notes ------------------------------------------------ */
.empty-state {
  margin: 1.25rem 0 0;
  padding: 2rem 1rem;
  text-align: center;
  background: #fff;
  border: 1px dashed #cfdcd4;
  border-radius: var(--radius);
  color: var(--merit-muted);
  font-size: .92rem;
}
.empty-state i { display: block; font-size: 1.4rem; margin-bottom: .5rem; color: #b6c6bd; }

.study-route {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem 2rem;
  flex-wrap: wrap;
  margin-top: 1.75rem;
  padding: 1.1rem 1.25rem;
  background: #fff;
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
}
.study-route-lead { margin: 0; font-size: .92rem; color: var(--merit-muted); }
.study-route-lead strong { color: var(--merit-navy); }
.study-steps {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin: 0;
  font-size: .9rem;
  font-weight: 600;
  color: var(--merit-navy);
}
.study-steps li { display: flex; align-items: center; gap: .45rem; }
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--merit-light-green);
  color: var(--merit-dark-green);
  font-size: .78rem;
}
.step-arrow { color: #b6c6bd; font-size: .8rem; }

.free-note {
  margin: 1.25rem 0 0;
  font-size: .92rem;
  color: var(--merit-muted);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.free-note strong { color: var(--merit-navy); }
.free-note a { font-weight: 600; }

/* 8. Responsive --------------------------------------------------------- */
@media (max-width: 991.98px) {
  .filter-rail { position: static; }
  .resource-tabs-bar { position: static; }
  .course-header-main { align-items: flex-start; }
  .course-actions { width: 100%; }
}

@media (max-width: 767.98px) {
  .course-header { padding-bottom: 1.5rem; }
  .resource-row { flex-wrap: wrap; }
  .row-actions { width: 100%; justify-content: flex-start; }
  .row-actions .btn { flex: 1 1 auto; justify-content: center; }
  .study-route { flex-direction: column; align-items: flex-start; }
  .study-steps { flex-wrap: wrap; row-gap: .5rem; }
}

@media (max-width: 575.98px) {
  .topic-tag { display: none; }
  .topic-tag.higher-only { display: inline-block; }
  .row-icon { width: 38px; height: 38px; font-size: 1rem; }
  .free-note { flex-direction: column; gap: .4rem; }
}