/*
 * hub.css — landing page for slides.elijahfrost.com.
 * Depends on /_framework/tokens.css for colors, fonts, motion.
 */

.hub {
  max-width: 56rem;
  margin-inline: auto;
  padding: 5rem 2rem 6rem;
}

@media (min-width: 768px) {
  .hub { padding: 7rem 3rem 8rem; }
}

/* ----- header ----- */

.hub-header {
  margin-bottom: 4rem;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.5rem;
}

.hub-header-text { flex: 1 1 auto; min-width: 0; }

.hub-header-actions {
  display: flex;
  gap: 0.5rem;
  flex-shrink: 0;
}

.hub-action {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--color-fg-muted);
  text-decoration: none;
  padding: 0.5rem 0.875rem;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: border-color var(--duration-base) var(--ease-out-quint),
              color var(--duration-base) var(--ease-out-quint);
}
.hub-action:hover,
.hub-action:focus-visible {
  color: var(--color-fg);
  border-color: var(--color-fg-muted);
  outline: none;
}

.hub-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(2.75rem, 7vw, 4.25rem);
  letter-spacing: var(--tracking-tight);
  line-height: 1;
  color: var(--color-fg-bright);
  margin: 0;
}

.hub-eyebrow {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-eyebrow);
  color: var(--color-fg-muted);
  margin: 1rem 0 0;
}

/* ----- search ----- */

.hub-search-wrap {
  margin-bottom: 3rem;
}

.hub-search {
  width: 100%;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-fg);
  font-family: var(--font-sans);
  font-size: 1rem;
  padding: 0.875rem 0;
  outline: none;
  transition: border-color var(--duration-base) var(--ease-out-quint);
}

.hub-search::placeholder {
  color: var(--color-fg-dim);
  letter-spacing: 0.01em;
}

.hub-search:focus {
  border-bottom-color: var(--color-fg-muted);
}

.hub-search:focus::placeholder {
  color: var(--color-fg-muted);
}

/* ----- catalog list ----- */

.hub-catalog {
  display: flex;
  flex-direction: column;
}

.hub-card-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.5rem;
  padding: 1.75rem 0;
  border-top: 1px solid var(--color-border-divider);
  transition: opacity var(--duration-base) var(--ease-out-quint);
}
.hub-card-row:last-of-type {
  border-bottom: 1px solid var(--color-border-divider);
}
.hub-catalog:hover .hub-card-row:not(:hover) {
  opacity: 0.55;
}

.hub-card {
  display: block;
  color: inherit;
  text-decoration: none;
}

.hub-card:focus-visible {
  outline: 2px solid var(--color-fg-muted);
  outline-offset: 4px;
}

.hub-card-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  font-size: 1.125rem;
  color: var(--color-fg-muted);
  text-decoration: none;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: border-color var(--duration-base) var(--ease-out-quint),
              color var(--duration-base) var(--ease-out-quint);
}
.hub-card-download:hover,
.hub-card-download:focus-visible {
  color: var(--color-fg);
  border-color: var(--color-border);
  outline: none;
}

.hub-card-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.625rem;
  line-height: 1.2;
  color: var(--color-fg);
  margin: 0;
}

.hub-card-description {
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--color-fg-soft);
  margin: 0.5rem 0 0;
  max-width: 42rem;
}

.hub-card-meta {
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: var(--tracking-label);
  color: var(--color-fg-muted);
  margin: 1rem 0 0;
}

.hub-card-tags:not(:empty)::before {
  content: " · ";
  color: var(--color-fg-dim);
  margin: 0 0.25rem;
}

/* ----- empty state ----- */

.hub-empty {
  color: var(--color-fg-muted);
  font-style: italic;
  padding: 2rem 0;
  margin: 0;
}