:root {
  color-scheme: light;
  font-family: system-ui, sans-serif;
  line-height: 1.5;

  --surface: #fff;
  --surface-muted: #f8f9fa;
  --text: #212529;
  --text-muted: #6c757d;
  --border: #dee2e6;
  --accent: var(--site-link-accent);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
}

.site-header,
.catalog,
.site-footer {
  width: min(68rem, calc(100% - 3rem));
  margin-inline: auto;
}

.site-header {
  padding-block: 2.5rem 1.5rem;
  border-bottom: 1px solid var(--border);
}

.site-header h1 {
  margin-block: 0.25rem 0.75rem;
  font-size: clamp(2rem, 5vw, 2.75rem);
  line-height: 1.15;
}

.catalog-section {
  margin-block: 2rem 3rem;
}

.catalog-section h2 {
  font-size: 1.6rem;
}

.catalog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: 1rem;
}

.catalog-card {
  display: flex;
  min-height: 12rem;
  flex-direction: column;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background: var(--surface);
}

.catalog-card h3 {
  margin-block: 0.75rem 0.35rem;
  font-size: 1.25rem;
}

.catalog-card p {
  margin-block: 0;
  color: var(--text-muted);
}

.site-header p:last-child {
  color: var(--text-muted);
  font-size: 1rem;
}

.catalog-card__meta,
.catalog-card__actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.catalog-card__meta {
  color: var(--text-muted);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.catalog-card__badge {
  padding: 0.1rem 0.45rem;
  border: 1px solid #9ec5fe;
  border-radius: 0.25rem;
  background: #e7f1ff;
  color: #084298;
}

.catalog-card__actions {
  margin-top: auto;
  padding-top: 1.25rem;
}

.catalog-card__action {
  display: inline-flex;
  align-items: center;
  min-height: 2.25rem;
  border-radius: 0.35rem;
  color: var(--accent);
  font-weight: 600;
}

.catalog-card__action--primary {
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--site-link-border);
  text-decoration: none;
}

.catalog-card__action--primary:hover {
  border-color: var(--site-link-hover-border);
  background: var(--site-link-hover-surface);
}

.catalog-card__action--source {
  padding: 0.4rem 0.25rem;
  font-weight: 500;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

.catalog-card__action--source:hover {
  text-decoration-thickness: 0.14em;
}

.site-footer {
  padding-block: 2rem 4rem;
  border-top: 1px solid var(--border);
  color: var(--text-muted);
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
  }
}

.catalog a:focus-visible {
  outline: 3px solid var(--site-focus-indicator);
  outline-offset: 2px;
}