/* ============================================================
   IRIBHM Microscopy Platform — Explorer Page Styles
   ============================================================ */

.explorer-layout {
  display: flex;
  gap: var(--space-8);
  margin-top: var(--space-6);
  min-height: calc(100vh - var(--header-height) - var(--space-12));
}

/* ── Sidebar Filters ─────────────────────────────────────── */
.explorer-sidebar {
  width: 280px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.filter-group-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--border-subtle);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  user-select: none;
  font-size: var(--text-sm);
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

.filter-option:hover {
  color: var(--text-primary);
}

.filter-option input[type="radio"],
.filter-option input[type="checkbox"] {
  appearance: none;
  width: 16px;
  height: 16px;
  border: 1.5px solid var(--border-strong);
  border-radius: 4px;
  background: var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.filter-option input[type="radio"] {
  border-radius: 50%;
}

.filter-option input[type="radio"]:checked,
.filter-option input[type="checkbox"]:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-option input[type="radio"]:checked::after {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: white;
}

.filter-option input[type="checkbox"]:checked::after {
  content: "";
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-top: -2px;
}

/* ── Main Content Area ───────────────────────────────────── */
.explorer-main {
  flex: 1;
  min-width: 0; /* prevent flex blowout */
  display: flex;
  flex-direction: column;
}

.explorer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
}

.explorer-search {
  position: relative;
  width: 100%;
  max-width: 400px;
}

.explorer-search i {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

.explorer-search input {
  width: 100%;
  padding: var(--space-2) var(--space-3) var(--space-2) var(--space-10);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  color: var(--text-primary);
  font-family: inherit;
  font-size: var(--text-sm);
  transition: all var(--transition-fast);
}

.explorer-search input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-subtle);
}

.explorer-controls {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.view-toggles {
  display: flex;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 2px;
}

.view-toggle {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  border: none;
  background: transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.view-toggle:hover {
  color: var(--text-primary);
}

.view-toggle.active {
  background: var(--bg-active);
  color: var(--text-primary);
  box-shadow: var(--shadow-sm);
}

/* ── Dataset Grid ────────────────────────────────────────── */
.dataset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-6);
}

/* ── Dataset List ────────────────────────────────────────── */
.dataset-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.dataset-list-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-base);
}

.dataset-list-item:hover {
  border-color: var(--border-strong);
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.dataset-list-icon {
  width: 64px;
  height: 64px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.dataset-list-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.dataset-list-title {
  font-weight: var(--weight-semibold);
  font-size: var(--text-md);
  color: var(--text-primary);
  margin-bottom: var(--space-1);
}

.dataset-list-meta {
  display: flex;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* ── Empty State ─────────────────────────────────────────── */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-16) 0;
  text-align: center;
  color: var(--text-muted);
}

.empty-state i {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  .explorer-layout {
    flex-direction: column;
  }
  .explorer-sidebar {
    width: 100%;
    border-bottom: 1px solid var(--border-subtle);
    padding-bottom: var(--space-6);
  }
  .explorer-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
  .explorer-search {
    max-width: 100%;
  }
}