/**
 * Article v2 - AI Enrichment Components
 * @description Styles for 7 enrichment block types generated by AI.
 *              Used inside .article-body__prose container (~780px max-width).
 *              Depends on design-system/tokens.css and article-v2/tokens.css.
 * @version 1.0.0
 * @date 2026-03-11
 */

/* ==========================================================================
   Common Enrichment Spacing
   ========================================================================== */

.article-key-takeaways,
.article-callout,
.article-pull-quote,
.article-comparison-table,
.article-steps,
.article-artist-spotlight,
.article-video {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

/* ==========================================================================
   1. Key Takeaways Box
   ========================================================================== */

.article-key-takeaways {
  background: var(--color-bg-elevated);
  border-left: 4px solid var(--color-brand-accent);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  /* Flat-at-rest: border-left carries definition, no resting shadow (INK-DESIGN-ART27 P3-i) */
}

.article-key-takeaways__header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-brand-accent);
  margin-bottom: var(--space-4);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.article-key-takeaways__header svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.article-key-takeaways__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.article-key-takeaways__list li {
  position: relative;
  padding-left: var(--space-6);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
}

.article-key-takeaways__list li::before {
  content: "\2713";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--color-brand-accent);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-lg);
}

@media (max-width: 600px) {
  .article-key-takeaways {
    padding: var(--space-4);
    border-radius: 0;
    margin-left: calc(-1 * var(--gutter));
    margin-right: calc(-1 * var(--gutter));
    border-left-width: 3px;
  }
}

/* ==========================================================================
   2. Callout Boxes
   ========================================================================== */

.article-callout {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  background: var(--color-bg-elevated);
  border-left: 4px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  /* Flat-at-rest: border-left carries definition, no resting shadow (INK-DESIGN-ART27 P3-i) */
}

.article-callout__icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
}

.article-callout__content {
  flex: 1;
  min-width: 0;
}

.article-callout__title {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

.article-callout__content p {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  margin: 0;
}

/* Variants */
.article-callout--tip {
  border-left-color: var(--color-success);
}
.article-callout--tip .article-callout__title {
  color: var(--color-success);
}
.article-callout--tip .article-callout__icon {
  background: rgba(76, 175, 80, 0.1);
}

.article-callout--warning {
  border-left-color: var(--color-warning);
}
.article-callout--warning .article-callout__title {
  color: var(--color-warning);
}
.article-callout--warning .article-callout__icon {
  background: rgba(255, 152, 0, 0.1);
}

.article-callout--danger {
  border-left-color: var(--color-error);
}
.article-callout--danger .article-callout__title {
  color: var(--color-error);
}
.article-callout--danger .article-callout__icon {
  background: rgba(244, 67, 54, 0.1);
}

.article-callout--info {
  border-left-color: var(--color-info);
}
.article-callout--info .article-callout__title {
  color: var(--color-info);
}
.article-callout--info .article-callout__icon {
  background: rgba(33, 150, 243, 0.1);
}

@media (max-width: 480px) {
  .article-callout {
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
  }

  .article-callout__icon {
    width: 32px;
    height: 32px;
    font-size: 1.1rem;
  }
}

/* ==========================================================================
   3. Pull Quote
   ========================================================================== */

.article-pull-quote {
  position: relative;
  max-width: 80%;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
  padding: var(--space-8) var(--space-6);
  border: none;
}

.article-pull-quote p {
  font-family: var(--font-display); /* Source Serif 4 retired; DM Serif Display (INK-DESIGN-ART27 §2.1) */
  font-size: 1.3em;
  line-height: var(--line-height-normal);
  color: var(--color-text);
  font-style: italic;
  margin: 0;
}

.article-pull-quote cite {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-style: normal;
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
}

.article-pull-quote::before,
.article-pull-quote::after {
  font-family: var(--font-display);
  font-size: 3rem;
  color: var(--color-brand-accent);
  opacity: 0.6;
  line-height: 1;
  position: absolute;
}

.article-pull-quote::before {
  content: "\201C";
  top: 0;
  left: 0;
}

.article-pull-quote::after {
  content: "\201D";
  bottom: 0;
  right: 0;
}

@media (max-width: 600px) {
  .article-pull-quote {
    max-width: 100%;
    padding: var(--space-6) var(--space-4);
  }

  .article-pull-quote p {
    font-size: 1.15em;
  }

  .article-pull-quote::before,
  .article-pull-quote::after {
    font-size: 2.25rem;
  }
}

/* ==========================================================================
   4. Comparison Table
   ========================================================================== */

.article-comparison-table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
}

.article-comparison-table table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  line-height: var(--line-height-normal);
  min-width: 400px;
}

.article-comparison-table thead th {
  background: var(--color-surface);
  color: var(--color-brand-accent);
  font-weight: var(--font-weight-semibold);
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid var(--color-brand-accent);
  white-space: nowrap;
}

.article-comparison-table tbody td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}

.article-comparison-table tbody tr:nth-child(even) {
  background: var(--color-bg-elevated);
}

.article-comparison-table tbody tr:last-child td {
  border-bottom: none;
}

.article-comparison-table tbody tr:hover {
  background: var(--color-bg-hover);
}

/* ==========================================================================
   5. Step-by-Step Block
   ========================================================================== */

.article-steps {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
}

.article-steps__item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  position: relative;
  padding-bottom: var(--space-6);
}

.article-steps__item:last-child {
  padding-bottom: 0;
}

/* Connecting vertical line */
.article-steps__item:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 19px;
  top: 40px;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.article-steps__number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-brand-accent);
  color: var(--color-black);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
  position: relative;
  z-index: 1;
}

.article-steps__content {
  flex: 1;
  min-width: 0;
  padding-top: var(--space-2);
}

.article-steps__title {
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0 0 var(--space-2) 0;
}

.article-steps__content p {
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
  margin: 0;
}

@media (max-width: 480px) {
  .article-steps__number {
    width: 32px;
    height: 32px;
    font-size: var(--text-sm);
  }

  .article-steps__item:not(:last-child)::after {
    left: 15px;
    top: 34px;
  }
}

/* ==========================================================================
   6. Artist Spotlight Card
   ========================================================================== */

.article-artist-spotlight {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.article-artist-spotlight:hover {
  border-color: var(--color-border-hover);
  box-shadow: var(--shadow-md);
}

.article-artist-spotlight__avatar {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  object-fit: cover;
  flex-shrink: 0;
  border: 2px solid var(--color-border);
}

.article-artist-spotlight__info {
  flex: 1;
  min-width: 0;
}

.article-artist-spotlight__name {
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0 0 var(--space-1) 0;
}

.article-artist-spotlight__handle {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-brand-accent);
  margin-bottom: var(--space-1);
}

.article-artist-spotlight__styles {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--letter-spacing-wide);
  text-transform: uppercase;
}

.article-artist-spotlight__btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-black);
  background: var(--color-brand-accent);
  border: none;
  border-radius: var(--radius-sm);
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast);
  white-space: nowrap;
}

.article-artist-spotlight__btn:hover {
  background: var(--color-brand-accent-hover);
  box-shadow: var(--shadow-glow);
}

@media (max-width: 480px) {
  .article-artist-spotlight {
    flex-wrap: wrap;
    gap: var(--space-3);
  }

  .article-artist-spotlight__avatar {
    width: 56px;
    height: 56px;
  }

  .article-artist-spotlight__btn {
    width: 100%;
    text-align: center;
  }
}

/* ==========================================================================
   7. Video Embed Wrapper
   ========================================================================== */

.article-video {
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-video__wrapper {
  position: relative;
  aspect-ratio: 16 / 9;
  background: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-video__wrapper iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: none;
}

.article-video__caption {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-3) var(--space-2);
  line-height: var(--line-height-normal);
}

/* ==========================================================================
   FAQ Block (Batch F — Issue #11)
   Inline FAQ markup (.faq-block / .faq-item / .faq-question / .faq-answer)
   produced by editorial in article body. Originally V1 markup with no V2 CSS.
   ========================================================================== */

.faq-block {
  margin: var(--space-8) 0;
  padding: var(--space-6);
  background: var(--color-surface-2, var(--color-bg-elevated, rgba(255, 255, 255, 0.03)));
  border: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
  border-radius: var(--radius-lg, 12px);
}

.faq-title {
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-5) 0;
  line-height: var(--line-height-tight);
}

.faq-item {
  border-bottom: 1px solid var(--color-border, rgba(255, 255, 255, 0.08));
}

.faq-item:last-child {
  border-bottom: 0;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--space-4) 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  line-height: var(--line-height-snug);
  transition: color 0.15s ease;
}

.faq-question:hover,
.faq-question:focus-visible {
  color: var(--color-brand-accent);
  outline: none;
}

.faq-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-left: var(--space-3);
  transition: transform 0.2s ease;
  color: var(--color-text-muted);
}

.faq-question[aria-expanded="true"] .faq-icon {
  transform: rotate(180deg);
  color: var(--color-brand-accent);
}

.faq-answer {
  padding: 0 0 var(--space-4) 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

.faq-answer[hidden] {
  display: none;
}

.faq-answer p {
  margin: 0 0 var(--space-3) 0;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.faq-answer ul,
.faq-answer ol {
  margin: var(--space-2) 0 var(--space-3) var(--space-5);
  padding: 0;
}

.faq-answer li {
  margin-bottom: var(--space-2);
}

@media (max-width: 640px) {
  .faq-block {
    padding: var(--space-4);
    margin: var(--space-6) 0;
  }
  .faq-title {
    font-size: var(--text-xl);
  }
  .faq-question {
    font-size: var(--text-base);
  }
}