/* Research / publications list. */

.research-filters {
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--border);
}

.research-filters__form {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.research-filters__field {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
}

.research-filters__label {
  color: var(--ink-muted);
  font-weight: var(--weight-medium);
}

.research-filters__field select {
  padding: var(--space-2) var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--ink);
  font-size: var(--text-sm);
}

.research-filters__clear { margin-left: auto; }

/* ---------- Publication grid (document tiles) ---------- */

.research-docs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-10) var(--space-6);
  margin-block-start: var(--space-8);
  padding: 0;
  list-style: none;
}

@media (min-width: 34rem) { .research-docs { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 48rem) { .research-docs { grid-template-columns: repeat(4, 1fr); } }
@media (min-width: 62rem) { .research-docs { grid-template-columns: repeat(5, 1fr); } }
@media (min-width: 75rem) { .research-docs { grid-template-columns: repeat(6, 1fr); } }

.research-doc { display: flex; }

.research-doc__link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-2);
  text-align: center;
  text-decoration: none;
  color: var(--ink);
  border-radius: var(--radius-md);
  transition: background-color var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

a.research-doc__link:hover {
  background: var(--bg-muted);
  transform: translateY(-3px);
}

.research-doc__icon {
  width: 5.5rem;
  height: auto;
  object-fit: contain;
  transition: transform var(--duration-base) var(--ease-out);
}

a.research-doc__link:hover .research-doc__icon { transform: scale(1.05); }

.research-doc__title {
  font-family: var(--font-serif);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-snug);
  letter-spacing: -0.005em;
  color: var(--ink);
  text-wrap: balance;
  transition: color var(--duration-fast) var(--ease-out);
}

a.research-doc__link:hover .research-doc__title { color: var(--brand); }

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

.research-pagination {
  margin-block-start: var(--space-10);
  padding-block-start: var(--space-6);
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: stretch;
}

@media (min-width: 48rem) {
  .research-pagination {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.research-pagination__count {
  font-size: var(--text-sm);
  color: var(--ink-muted);
  font-family: var(--font-mono);
  letter-spacing: var(--tracking-wide);
}

.research-pagination__controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.research-pagination__pos {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--ink-muted);
  white-space: nowrap;
}

/* Empty state shared with news.css; loaded both pages so empty-state styles
   are present if the news css isn't on the page. Define here too for safety. */
.empty-state {
  text-align: center;
  padding-block: var(--space-16);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  max-width: 38rem;
  margin-inline: auto;
  color: var(--ink-muted);
}

.empty-state svg { color: var(--ink-faint); }
.empty-state__title { font-size: var(--text-xl); color: var(--ink); margin: var(--space-2) 0 0; }
.empty-state__body { color: var(--ink-muted); }