body { min-height: 100vh; }

.catalog-hero {
  padding: 9rem 2.5rem 4rem;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 20% 20%, rgba(74,240,196,.08), transparent 35%),
    radial-gradient(circle at 80% 30%, rgba(123,111,255,.09), transparent 36%);
}

.catalog-hero-inner,
.catalog-shell {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.catalog-hero h1,
.catalog-cta h2 {
  font-family: var(--title);
  letter-spacing: -.03em;
}

.catalog-hero h1 {
  font-size: clamp(2.1rem, 5vw, 4.2rem);
  line-height: 1.18;
  margin: .8rem 0 1.5rem;
}

.catalog-accent { color: var(--accent); }

.catalog-lead {
  max-width: 760px;
  color: var(--muted);
  line-height: 2;
  font-size: .98rem;
}

.catalog-note {
  margin-top: 2rem;
  max-width: 760px;
  padding: 1rem 1.2rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: .8rem;
  line-height: 1.8;
  background: var(--surface);
}

.catalog-section { padding: 4rem 0 7rem; }

.catalog-status {
  padding: 1rem 1.1rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--muted);
  font-size: .82rem;
  line-height: 1.7;
  background: var(--surface);
}

.catalog-status.error {
  border-color: rgba(240,162,74,.3);
  color: var(--accent3);
}

.catalog-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  gap: .8rem;
  margin-bottom: 1.5rem;
}

.catalog-stat {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  padding: 1rem;
}

.catalog-stat strong {
  display: block;
  font-family: var(--title);
  font-size: 1.45rem;
  color: var(--accent);
  margin-bottom: .25rem;
}

.catalog-stat span {
  color: var(--muted);
  font-size: .72rem;
}

.catalog-controls {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.5rem;
  position: sticky;
  top: 0;
  z-index: 4;
  padding: 1rem 0;
  background: linear-gradient(to bottom, var(--bg) 78%, transparent);
}

.catalog-search {
  display: grid;
  gap: .5rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: .68rem;
  letter-spacing: .08em;
}

.catalog-search input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  padding: .95rem 1rem;
  font: inherit;
  font-family: var(--sans);
  font-size: .9rem;
  outline: none;
}

.catalog-search input:focus { border-color: rgba(74,240,196,.45); }

.chapter-filters {
  display: flex;
  flex-wrap: wrap;
  gap: .55rem;
}

.chapter-filter {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--muted);
  border-radius: 999px;
  padding: .55rem .8rem;
  cursor: pointer;
  font-family: var(--mono);
  font-size: .66rem;
}

.chapter-filter.active {
  border-color: rgba(74,240,196,.45);
  color: var(--accent);
  background: rgba(74,240,196,.06);
}

.catalog-results {
  display: grid;
  gap: 1rem;
}

.catalog-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 1.35rem;
}

.catalog-card-head {
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: .8rem;
}

.catalog-id {
  font-family: var(--mono);
  color: var(--accent);
  font-size: .7rem;
  letter-spacing: .08em;
}

.catalog-card h2 {
  margin: .25rem 0 0;
  font-family: var(--title);
  font-size: 1.08rem;
  line-height: 1.5;
}

.catalog-summary {
  color: var(--muted);
  font-size: .84rem;
  line-height: 1.85;
  margin: .8rem 0 1rem;
}

.catalog-content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  gap: .65rem;
}

.catalog-content {
  border: 1px solid var(--border);
  border-radius: 9px;
  padding: .8rem;
  background: var(--surface2);
}

.catalog-content strong {
  display: block;
  font-family: var(--title);
  font-size: .82rem;
  margin-bottom: .25rem;
}

.catalog-content span {
  color: var(--muted);
  font-size: .72rem;
}

.catalog-keywords {
  display: flex;
  flex-wrap: wrap;
  gap: .4rem;
  margin-top: 1rem;
}

.catalog-keyword {
  padding: .25rem .55rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: .68rem;
}

.catalog-empty {
  border: 1px dashed var(--border);
  border-radius: 12px;
  padding: 2.5rem 1.2rem;
  text-align: center;
  color: var(--muted);
  line-height: 1.8;
}

.catalog-cta {
  border-top: 1px solid var(--border);
  padding: 5rem 0;
}

.catalog-cta h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  margin: .7rem 0 1rem;
}

.catalog-cta p {
  color: var(--muted);
  line-height: 1.9;
  max-width: 720px;
}

.catalog-actions {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
}

@media (max-width: 720px) {
  .catalog-hero { padding: 8rem 1rem 3rem; }
  .catalog-section, .catalog-cta { padding-left: .2rem; padding-right: .2rem; }
  .catalog-hero-inner, .catalog-shell { width: min(100% - 1.2rem, 1120px); }
  .catalog-card-head { display: block; }
}