/*
 * blog_archive.css — /blog listing page.
 *
 * Layout: sticky sidebar (left) + card grid (right) on desktop; the
 * sidebar collapses into a <details> accordion on mobile so the filters
 * stay one tap away without dominating the small screen.
 *
 * Reuses the .card-grid--3 atom from card.css so blog tiles look
 * identical to every other listing on the site.
 */

/* ---------- Hero band ------------------------------------------------- */

.archive-full-hero {
  padding-block: var(--space-8) var(--space-7);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.archive-full-hero__eyebrow {
  font-size: var(--type-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-2);
}
.archive-full-hero__title {
  font-family: var(--font-serif);
  font-size: clamp(2rem, 4vw, var(--type-4xl));
  margin: 0 0 var(--space-3);
}
.archive-full-hero__lead {
  color: var(--color-ink-muted);
  font-size: var(--type-lg);
  max-width: 640px;
  margin: 0;
}

/* ---------- Two-column layout ---------------------------------------- */

.archive-layout {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: var(--space-6);
  padding-block: var(--space-7);
  align-items: start;
}

@media (max-width: 900px) {
  .archive-layout {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

/* ---------- Sidebar -------------------------------------------------- */

.archive-sidebar {
  position: sticky;
  top: 96px;                          /* clear the public header */
  align-self: start;
}
@media (max-width: 900px) {
  .archive-sidebar {
    position: static;
    top: 0;
  }
}

.archive-filters {
  background: var(--color-paper);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.archive-filters > summary {
  padding: var(--space-4) var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--type-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  list-style: none;
}
.archive-filters > summary::-webkit-details-marker { display: none; }
.archive-filters[open] > summary {
  border-bottom: 1px solid var(--color-border);
}
.archive-sidebar__toggle {
  transition: transform var(--transition-fast);
}
.archive-filters[open] .archive-sidebar__toggle {
  transform: rotate(180deg);
}

.filter-form {
  padding: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.filter-group h3 {
  font-family: var(--font-sans);
  font-size: var(--type-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink);
  margin: 0 0 var(--space-3);
}

.filter-form input[type="search"],
.filter-select {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-paper);
  font: inherit;
  font-size: var(--type-sm);
}
.filter-form input[type="search"]:focus,
.filter-select:focus {
  outline: none;
  border-color: var(--color-ink);
  box-shadow: 0 0 0 3px rgba(17, 24, 39, 0.08);
}

/* ---- Topic checkboxes styled as click-pills ---- */

.filter-tags {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border: 1px solid var(--color-border);
  background: var(--color-paper);
  border-radius: 999px;
  cursor: pointer;
  font-size: var(--type-xs);
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
}
.filter-tag:hover {
  border-color: var(--color-ink);
}
.filter-tag input[type="checkbox"] {
  /* hide the native control but keep it accessible to assistive tech */
  position: absolute;
  opacity: 0;
  pointer-events: none;
  width: 1px; height: 1px;
}
.filter-tag.is-active {
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-brand-ink);
}
.filter-tag__count {
  padding: 1px 6px;
  background: var(--color-surface);
  border-radius: 999px;
  color: var(--color-ink-muted);
  font-weight: 500;
}
.filter-tag.is-active .filter-tag__count {
  background: rgba(255, 255, 255, 0.18);
  color: var(--color-brand-ink);
}

/* ---- Sort radios ---- */

.filter-radio {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 4px 0;
  font-size: var(--type-sm);
  cursor: pointer;
}

.filter-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.filter-clear {
  text-align: center;
  font-size: var(--type-sm);
  color: var(--color-ink-muted);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.filter-clear:hover { color: var(--color-brand); }

/* ---------- Results column ------------------------------------------ */

.archive-results { min-width: 0; }   /* let grid cells shrink */

.archive-count {
  font-size: var(--type-sm);
  color: var(--color-ink-muted);
  margin: 0 0 var(--space-5);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

/* Active-filter pills — show what's applied so the user can peel them off */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 var(--space-4);
  padding: var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.active-filters__label {
  font-size: var(--type-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-ink-muted);
  margin-right: var(--space-2);
}
.active-filter {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--color-ink);
  color: var(--color-paper);
  text-decoration: none;
  font-size: var(--type-xs);
  font-weight: 500;
  transition: background var(--transition-fast);
}
.active-filter:hover { background: var(--color-brand); color: var(--color-brand-ink); }
.active-filter--static {
  background: var(--color-surface);
  color: var(--color-ink-muted);
  border: 1px solid var(--color-border);
}
.active-filter--static:hover { background: var(--color-surface); color: var(--color-ink-muted); }

/* ---------- Empty state --------------------------------------------- */

.archive-empty {
  padding: var(--space-8) var(--space-5);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  text-align: center;
  color: var(--color-ink-muted);
}
.archive-empty__title {
  font-family: var(--font-serif);
  font-size: var(--type-xl);
  color: var(--color-ink);
  margin: 0 0 var(--space-2);
}
.archive-empty__hint { margin: 0 0 var(--space-4); }

/* ---------- Pagination ---------------------------------------------- */

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-7);
  font-size: var(--type-sm);
}
.pagination__pages {
  list-style: none;
  display: flex;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.pagination__step,
.pagination__page {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 38px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-paper);
  color: var(--color-ink);
  text-decoration: none;
  font-weight: 500;
  transition: background var(--transition-fast),
              border-color var(--transition-fast);
}
.pagination__step:hover,
.pagination__page:hover {
  background: var(--color-surface);
  border-color: var(--color-ink);
}
.pagination__page.is-current {
  background: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
  cursor: default;
}
.pagination__step.is-disabled {
  opacity: .4;
  cursor: not-allowed;
}
.pagination__step.is-disabled:hover {
  background: var(--color-paper);
  border-color: var(--color-border);
}