/* ============================================================
   ApoClock — Content Hub Shared Styles
   Aurora UI · Learn article index (card grid)
   ============================================================ */

/* ── Page wrapper (clears fixed nav) ──────────────────────── */
.learn-page {
  position: relative;
  min-height: 100vh;
  padding-top: var(--nav-h);
  overflow: hidden;
}

.learn-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 60px 24px 100px;
  position: relative;
  z-index: 1;
}

/* ── Hero ─────────────────────────────────────────────────── */
.learn-header {
  margin-bottom: 56px;
}

.learn-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.learn-intro {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.75;
  max-width: 620px;
}

/* ── Article Grid (3 → 2 → 1 col) ─────────────────────────── */
.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* ── Article Card ─────────────────────────────────────────── */
.article-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.article-card:hover {
  border-color: rgba(124, 58, 237, 0.4);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 30px rgba(124, 58, 237, 0.12);
}

/* ── Card hero media — self-contained 16:9 gradient block ─── */
.article-card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.4rem;
  line-height: 1;
  background:
    radial-gradient(circle at 30% 30%, rgba(124, 58, 237, 0.45) 0%, transparent 60%),
    radial-gradient(circle at 75% 80%, rgba(245, 158, 11, 0.4) 0%, transparent 60%),
    linear-gradient(135deg, var(--color-purple) 0%, var(--color-purple-mid) 45%, var(--color-gold) 130%);
  border-bottom: 1px solid var(--color-border);
}

.article-card-media-icon {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 16px rgba(0, 0, 0, 0.45));
}

/* ── Card body ────────────────────────────────────────────── */
.article-card-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 24px 26px;
  flex: 1;
}

/* Category pill hugs its content rather than stretching the column */
.article-card-body .tag,
.article-card-read { align-self: flex-start; }

.article-card-title {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text-primary);
  line-height: 1.3;
}

.article-card-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
  flex: 1;
}

.article-card-read {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 4px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-purple-bright);
  transition: gap 0.2s ease, color 0.2s ease;
}

.article-card:hover .article-card-read {
  gap: 10px;
  color: #fff;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .article-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .article-grid { grid-template-columns: 1fr; }
  .learn-container { padding: 48px 24px 72px; }
}

/* ════════════════════════════════════════════════════════════
   Article reading page
   Aurora UI · single-article long-form layout
   ════════════════════════════════════════════════════════════ */

/* ── Page wrapper (clears fixed nav) ──────────────────────── */
.article-page {
  position: relative;
  min-height: 100vh;
  padding-top: var(--nav-h);
  overflow: hidden;
}

/* ── Article header (full container width) ────────────────── */
.article-header {
  max-width: 720px;
  margin: 0 auto;
  padding: 60px 24px 0;
  position: relative;
  z-index: 1;
}

/* ← Back to Learn breadcrumb (muted purple) */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-purple-bright);
  opacity: 0.75;
  margin-bottom: 28px;
  transition: gap 0.2s ease, opacity 0.2s ease, color 0.2s ease;
}

.article-back:hover {
  opacity: 1;
  gap: 10px;
  color: #fff;
}

/* Category pill + publish date */
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.article-date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.article-title {
  font-size: clamp(2rem, 4.5vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
  margin-bottom: 16px;
  color: var(--color-text-primary);
}

.article-deck {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ── Hero media — self-contained 16:9 gradient + purple glow ─ */
.article-hero {
  max-width: 720px;
  margin: 40px auto 0;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.article-hero-media {
  position: relative;
  aspect-ratio: 16 / 9;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  line-height: 1;
  border-radius: var(--radius-2xl);
  border: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 28% 28%, rgba(124, 58, 237, 0.5) 0%, transparent 60%),
    radial-gradient(circle at 78% 82%, rgba(245, 158, 11, 0.42) 0%, transparent 60%),
    linear-gradient(135deg, var(--color-purple) 0%, var(--color-purple-mid) 45%, var(--color-gold) 135%);
  box-shadow: 0 30px 80px rgba(124, 58, 237, 0.35), 0 0 60px rgba(124, 58, 237, 0.2);
}

.article-hero-media span {
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 6px 22px rgba(0, 0, 0, 0.5));
}

/* ── Reading column ───────────────────────────────────────── */
.article-body {
  max-width: 720px;
  margin: 0 auto;
  padding: 56px 24px 80px;
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.article-body > p {
  margin-bottom: 24px;
}

.article-body a {
  color: var(--color-purple-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.15s;
}
.article-body a:hover { color: #fff; }

.article-body strong { color: var(--color-text-primary); }

/* h2 — gradient underline accent */
.article-body h2 {
  font-size: 1.65rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
  color: var(--color-text-primary);
  margin: 52px 0 20px;
  padding-bottom: 12px;
  position: relative;
}

.article-body h2::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 64px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(135deg, #A78BFA, #F59E0B);
}

/* h3 — smaller, purple-bright, no underline */
.article-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-purple-bright);
  margin: 36px 0 14px;
}

.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-body ul li {
  list-style: none;
  position: relative;
  padding-left: 24px;
}

.article-body ul li::before {
  content: '›';
  position: absolute;
  left: 6px;
  color: var(--color-purple-bright);
  font-weight: 700;
}

.article-body ol {
  padding-left: 22px;
}
.article-body ol li {
  list-style: decimal;
  padding-left: 6px;
}
.article-body ol li::marker {
  color: var(--color-purple-bright);
  font-weight: 700;
}

/* Blockquote — purple left border, tinted, italic */
.article-body blockquote {
  margin: 32px 0;
  padding: 18px 24px;
  border-left: 3px solid var(--color-purple);
  background: rgba(124, 58, 237, 0.07);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  font-style: italic;
  color: var(--color-text-primary);
  font-size: 1.08rem;
  line-height: 1.7;
}

/* Tip / Note callout box */
.article-tip {
  margin: 32px 0;
  padding: 18px 22px;
  background: rgba(124, 58, 237, 0.1);
  border: 1px solid rgba(124, 58, 237, 0.2);
  border-left: 3px solid var(--color-purple);
  border-radius: var(--radius-md);
  font-size: 0.975rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.article-tip strong {
  color: var(--color-purple-bright);
}

/* Inline code — mono pill on dark surface */
.article-body :not(pre) > code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-sm);
  padding: 2px 7px;
  color: var(--color-purple-bright);
  white-space: nowrap;
}

/* Code block — dark elevated surface, scrollable */
.article-body pre {
  margin: 28px 0;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  overflow-x: auto;
}

.article-body pre code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--color-text-primary);
  white-space: pre;
  display: block;
}

/* ── Bottom CTA strip — full-width dark surface band ──────── */
.article-cta {
  position: relative;
  z-index: 1;
  margin-top: 40px;
  background: linear-gradient(135deg, #13133A 0%, var(--color-surface) 60%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  overflow: hidden;
}

.article-cta-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px;
  text-align: center;
  position: relative;
  z-index: 1;
}

.article-cta h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 12px;
  color: var(--color-text-primary);
}

.article-cta p {
  font-size: 1.02rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 480px;
  margin: 0 auto 28px;
}

.article-cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .article-header { padding-top: 48px; }
  .article-body { padding: 44px 24px 64px; }
  .article-hero-media { font-size: 3.6rem; }
  .article-cta-inner { padding: 48px 24px; }
  .article-cta-actions .btn-primary,
  .article-cta-actions .btn-ghost { width: 100%; justify-content: center; }
}

/* ── Tables — comparison / period-badge articles ─────────── */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 0.95rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-body thead th {
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  text-align: left;
  font-weight: 600;
}

.article-body th,
.article-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border-subtle);
  vertical-align: top;
}

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

.article-body tbody tr:hover td {
  background: rgba(124, 58, 237, 0.05);
}