/* ── Header ──────────────────────────────────────────────────────── */
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1.25rem 1.5rem;
  text-align: center;
}

.app-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.25rem;
}

.app-header h1 a {
  color: inherit;
  text-decoration: none;
}

.app-header .subtitle {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ── Footer ──────────────────────────────────────────────────────── */
.app-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 1rem 1.5rem;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  margin-top: auto;
}

/* ── Main layout ─────────────────────────────────────────────────── */
#app-root {
  flex: 1;
  max-width: var(--max-width);
  width: 100%;
  margin: 0 auto;
  padding: 1.5rem;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.app-layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 1.5rem;
  align-items: start;
  flex: 1;
  min-height: 0;
}

.content-area {
  overflow-y: auto;
  max-height: calc(100vh - 10rem);
}

/* Search bar stays fixed at top of content */
.search-bar {
  margin-bottom: 1.25rem;
  flex-shrink: 0;
}

/* ── Search bar ──────────────────────────────────────────────────── */
.search-bar {
  margin-bottom: 1.25rem;
}

.search-bar input {
  width: 100%;
  padding: 0.625rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-surface);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-bar input::placeholder {
  color: var(--color-gray-400);
}

.search-bar input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-focus);
  outline: none;
}

/* ── Filter sidebar ──────────────────────────────────────────────── */
.filter-sidebar {
  position: sticky;
  top: 1rem;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
  contain: layout paint;
}

.filter-group {
  margin-bottom: 1.25rem;
}

.filter-group h3 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
  margin-bottom: 0.5rem;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.625rem;
  font-size: 0.8rem;
  font-family: var(--font-family);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-pill);
  background: var(--color-surface);
  color: var(--color-gray-700);
  cursor: pointer;
  transition: background var(--transition-fast),
              border-color var(--transition-fast),
              color var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.filter-chip:hover {
  background: var(--color-gray-100);
  border-color: var(--color-gray-400);
}

.filter-chip.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-primary-text);
}

.filter-chip .count {
  font-size: 0.7rem;
  opacity: 0.7;
}

/* ── Tags accordion ─────────────────────────────────────────────── */
.filter-accordion {
  border-top: 1px solid var(--color-gray-200);
  margin-top: 0.25rem;
  padding-top: 0.75rem;
}

.filter-accordion-summary {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
  padding: 0.25rem 0;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-gray-500);
}

.filter-accordion-summary::-webkit-details-marker {
  display: none;
}

.filter-accordion-summary::marker {
  display: none;
  content: '';
}

.accordion-arrow {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--color-gray-400);
  margin-left: auto;
  transition: transform var(--transition-fast);
}

details[open] .accordion-arrow {
  transform: rotate(180deg);
}

.accordion-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 1.2rem;
  height: 1.2rem;
  padding: 0 0.3rem;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--color-primary-text);
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  line-height: 1;
}

.accordion-content {
  padding-top: 0.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

/* Desktop: hide mobile-only filter controls */
.filter-toggle-btn { display: none; }
.filter-drawer-close { display: none; }