/*
 * IsleIQ learning library and article styles.
 * Depends on: iq-tokens.css, iq-typography.css, iq-components.css
 *
 * Two parts:
 *   1. [iq_learn_archive] shortcode output (functions.php).
 *   2. Single post article rhythm, scoped to .single-post .entry-content.
 *
 * Category slugs map to pillar badges:
 *   ai-for-business -> iq-post-card__pillar--ai
 *   money           -> iq-post-card__pillar--money
 *   productivity    -> iq-post-card__pillar--productivity
 */

/* ------------------------------------------------------------------
   1. LEARNING LIBRARY
------------------------------------------------------------------ */

.iq-learn-archive {
  display: grid;
  gap: var(--iq-space-8);
}

.iq-archive-filters {
  display: flex;
  flex-wrap: wrap;
  gap: var(--iq-space-2);
}

.iq-archive-filter {
  display: inline-flex;
  align-items: center;
  min-height: 2.4rem;
  padding: 0.5rem 1rem;
  border: 1px solid var(--iq-border-strong);
  border-radius: var(--iq-radius-pill);
  background: var(--iq-bg-surface);
  color: var(--iq-text-secondary);
  font-family: var(--iq-font-display);
  font-size: var(--iq-text-sm);
  font-weight: 800;
  text-decoration: none;
  transition:
    background-color var(--iq-duration) var(--iq-ease),
    border-color var(--iq-duration) var(--iq-ease),
    color var(--iq-duration) var(--iq-ease);
}

.iq-archive-filter:hover,
.iq-archive-filter.is-active {
  border-color: var(--iq-teal);
  background: var(--iq-teal);
  color: var(--iq-white);
  text-decoration: none;
}

.iq-posts-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--iq-space-6);
}

.iq-post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  border: 1px solid var(--iq-border);
  border-radius: var(--iq-radius-lg);
  background: var(--iq-bg-surface);
  box-shadow: var(--iq-shadow-sm);
  transition:
    transform var(--iq-duration) var(--iq-ease),
    box-shadow var(--iq-duration) var(--iq-ease);
}

.iq-post-card:hover {
  box-shadow: var(--iq-shadow);
  transform: translateY(-3px);
}

.iq-post-card__thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--iq-navy);
}

.iq-post-card__thumb a {
  display: block;
  height: 100%;
}

.iq-post-card__thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--iq-duration-slow) var(--iq-ease);
}

.iq-post-card:hover .iq-post-card__thumb img {
  transform: scale(1.04);
}

/* Thumbnail fallback when a post has no featured image. */
.iq-post-card__thumb--empty {
  background:
    radial-gradient(ellipse at 80% 10%, rgba(46, 196, 182, 0.24), transparent 60%),
    linear-gradient(150deg, var(--iq-teal), var(--iq-navy));
}

.iq-post-card__pillar {
  position: absolute;
  top: var(--iq-space-3);
  left: var(--iq-space-3);
  padding: 0.38rem 0.6rem;
  border-radius: var(--iq-radius);
  background: var(--iq-white);
  color: var(--iq-teal);
  font-family: var(--iq-font-display);
  font-size: var(--iq-text-xs);
  font-weight: 800;
  line-height: 1.25;
  /* Full pillar names are long; wrap rather than overflow small cards. */
  max-width: calc(100% - (var(--iq-space-3) * 2));
}

.iq-post-card__pillar--ai {
  background: var(--iq-mint);
  color: var(--iq-on-mint);
}

.iq-post-card__pillar--money {
  background: var(--iq-amber);
  color: var(--iq-on-amber);
}

.iq-post-card__pillar--productivity,
.iq-post-card__pillar--prompts {
  background: var(--iq-teal);
  color: var(--iq-white);
}

.iq-post-card__body {
  display: flex;
  flex: 1;
  flex-direction: column;
  padding: var(--iq-space-5);
}

.iq-post-card__meta {
  margin-bottom: var(--iq-space-2);
  color: var(--iq-text-muted);
  font-size: var(--iq-text-xs);
  font-weight: 700;
}

.iq-post-card__sep {
  margin-inline: 0.35em;
}

.iq-post-card__title {
  margin-bottom: var(--iq-space-2);
  font-size: var(--iq-text-xl);
  line-height: var(--iq-leading-snug);
}

.iq-post-card__title a {
  color: var(--iq-text-primary);
  text-decoration: none;
}

.iq-post-card__title a:hover {
  color: var(--iq-teal);
}

.iq-post-card__excerpt {
  margin-bottom: var(--iq-space-4);
  color: var(--iq-text-secondary);
  font-size: var(--iq-text-sm);
}

.iq-post-card__cta {
  margin-top: auto;
}

/* First card on page one spans the grid. */
.iq-post-card--featured {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
}

.iq-post-card--featured .iq-post-card__thumb {
  aspect-ratio: auto;
  min-height: 18rem;
}

.iq-post-card--featured .iq-post-card__body {
  justify-content: center;
  padding: clamp(var(--iq-space-6), 4vw, var(--iq-space-10));
}

.iq-post-card--featured .iq-post-card__title {
  font-size: var(--iq-text-3xl);
}

.iq-post-card--featured .iq-post-card__excerpt {
  font-size: var(--iq-text-base);
}

.iq-no-posts {
  color: var(--iq-text-muted);
}

.iq-archive-pagination .nav-links,
.iq-archive-pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--iq-space-2);
}

.iq-archive-pagination .page-numbers {
  display: inline-grid;
  place-items: center;
  min-width: 2.5rem;
  min-height: 2.5rem;
  padding: 0 0.75rem;
  border: 1px solid var(--iq-border-strong);
  border-radius: var(--iq-radius);
  color: var(--iq-text-secondary);
  font-family: var(--iq-font-display);
  font-size: var(--iq-text-sm);
  font-weight: 800;
  text-decoration: none;
}

.iq-archive-pagination .page-numbers:hover,
.iq-archive-pagination .page-numbers.current {
  border-color: var(--iq-teal);
  background: var(--iq-teal);
  color: var(--iq-white);
}

/* ------------------------------------------------------------------
   2. SINGLE POST
------------------------------------------------------------------ */

.single-post .site-main {
  width: min(100% - (var(--iq-container-pad) * 2), 780px);
  margin-inline: auto;
  padding-block: var(--iq-section-sm);
}

.single-post .entry-title {
  margin-bottom: var(--iq-space-4);
  font-size: var(--iq-text-4xl);
}

.single-post .entry-content {
  color: var(--iq-text-secondary);
  font-size: var(--iq-text-md);
  line-height: var(--iq-leading-loose);
}

.single-post .entry-content > p:first-of-type {
  color: var(--iq-text-primary);
  font-size: var(--iq-text-lg);
}

.single-post .entry-content h2 {
  margin-top: var(--iq-space-12);
  font-size: var(--iq-text-3xl);
}

.single-post .entry-content h3 {
  margin-top: var(--iq-space-10);
  font-size: var(--iq-text-2xl);
}

.single-post .entry-content a:not([class]) {
  color: var(--iq-teal);
  font-weight: 600;
}

.single-post .entry-content ul:not([class]) li::marker {
  color: var(--iq-mint-700);
}

.single-post .entry-content ol:not([class]) li::marker {
  color: var(--iq-teal);
  font-family: var(--iq-font-display);
  font-weight: 800;
}

.single-post .entry-content blockquote {
  margin: var(--iq-space-8) 0;
  padding: var(--iq-space-5) var(--iq-space-6);
  border-left: 4px solid var(--iq-amber);
  border-radius: 0 var(--iq-radius-lg) var(--iq-radius-lg) 0;
  background: var(--iq-amber-050);
  color: var(--iq-slate);
}

.single-post .entry-content blockquote p:last-child {
  margin-bottom: 0;
}

/* "Here is the practical part." callout for the key step in a post. */
.single-post .entry-content .iq-practical {
  position: relative;
  margin: var(--iq-space-8) 0;
  padding: var(--iq-space-6) var(--iq-space-6) var(--iq-space-6) var(--iq-space-8);
  border-radius: var(--iq-radius-lg);
  background: var(--iq-navy);
  color: rgba(255, 255, 255, 0.82);
}

.single-post .entry-content .iq-practical::before {
  content: "Here is the practical part";
  display: block;
  margin-bottom: var(--iq-space-2);
  color: var(--iq-mint);
  font-family: var(--iq-font-display);
  font-size: var(--iq-text-xs);
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.single-post .entry-content .iq-practical p:last-child {
  margin-bottom: 0;
}

.single-post .entry-content .iq-practical p {
  color: inherit;
}

.single-post .entry-content figure {
  margin: var(--iq-space-8) 0;
}

.single-post .entry-content figure img {
  border-radius: var(--iq-radius-lg);
}

.single-post .entry-content figcaption {
  margin-top: var(--iq-space-2);
  color: var(--iq-text-muted);
  font-size: var(--iq-text-sm);
  text-align: center;
}

.single-post .entry-content table {
  width: 100%;
  margin: var(--iq-space-8) 0;
  border-collapse: collapse;
  font-size: var(--iq-text-sm);
}

.single-post .entry-content th {
  padding: var(--iq-space-3) var(--iq-space-4);
  background: var(--iq-navy);
  color: var(--iq-white);
  font-family: var(--iq-font-display);
  text-align: left;
}

.single-post .entry-content td {
  padding: var(--iq-space-3) var(--iq-space-4);
  border-bottom: 1px solid var(--iq-border);
}

.single-post .entry-content tbody tr:nth-child(even) {
  background: var(--iq-slate-050);
}

/* ------------------------------------------------------------------
   3. RESPONSIVE AND MOTION
------------------------------------------------------------------ */

@media (max-width: 900px) {
  .iq-posts-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .iq-post-card--featured {
    grid-template-columns: 1fr;
  }

  .iq-post-card--featured .iq-post-card__thumb {
    min-height: 0;
    aspect-ratio: 16 / 9;
  }
}

@media (max-width: 640px) {
  .iq-posts-grid {
    grid-template-columns: 1fr;
  }

  .single-post .entry-content table {
    display: block;
    overflow-x: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .iq-post-card:hover,
  .iq-post-card:hover .iq-post-card__thumb img {
    transform: none;
  }
}