/* ─────────────────────────────────────────────────────────────────
   SE Theme — Article: Single Post · Content · Course Elements
   ───────────────────────────────────────────────────────────────── */

/* ── Article header ──────────────────────────────────────────── */
.se-post-header {
  margin-bottom: var(--s7);
}
.se-post-header .se-breadcrumb { margin-bottom: var(--s4); }

.se-post-category {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--clr-neon);
  margin-bottom: var(--s3);
  text-decoration: none;
  transition: color var(--t-fast);
}
.se-post-category:hover { color: var(--text-bright); }

.se-post-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  color: var(--text-bright);
  line-height: 1.15;
  margin-bottom: var(--s4);
}

.se-post-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s3);
  font-family: var(--font-ui);
  font-size: .8rem;
  color: var(--text-dim);
  margin-bottom: var(--s5);
}
.se-post-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.se-post-meta-sep { color: var(--border-strong); }
.se-post-xp-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(0,255,231,.08);
  border: 1px solid rgba(0,255,231,.2);
  border-radius: 20px;
  padding: 2px 10px;
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--clr-neon);
}

/* ── Featured image ─────────────────────────────────────────── */
.se-post-thumbnail {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--s6);
  display: block;
}

/* ── Article body content ────────────────────────────────────── */
.entry-content {
  font-size: 1rem;
  line-height: 1.8;
  max-width: 720px;
}
.entry-content > * + * { margin-top: var(--s4); }
.entry-content h2 { margin-top: var(--s7); }
.entry-content h3 { margin-top: var(--s6); }
.entry-content h4 { margin-top: var(--s5); }

/* Scroll anchor offset for sticky header */
.entry-content h2[id],
.entry-content h3[id] {
  scroll-margin-top: calc(var(--header-h) + 32px + var(--s4));
}

/* Heading marker lines */
.entry-content h2 {
  position: relative;
  padding-bottom: var(--s3);
}
.entry-content h2::after {
  content: '';
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--clr-neon), transparent);
  margin-top: var(--s3);
  opacity: .4;
}

/* ── Callout / tip / warning boxes (native WP blocks) ─────────── */
.se-callout,
.wp-block-notice,
.notice {
  border-radius: var(--radius);
  padding: var(--s4) var(--s5);
  margin: var(--s5) 0;
  font-size: .9rem;
  border-left: 3px solid;
}
.se-callout--info {
  background: rgba(0,255,231,.04);
  border-color: var(--clr-neon);
  color: var(--text);
}
.se-callout--warn {
  background: rgba(255,230,0,.04);
  border-color: var(--clr-neon3);
}
.se-callout--danger {
  background: rgba(255,45,120,.04);
  border-color: var(--clr-neon2);
}
.se-callout--success {
  background: rgba(0,255,136,.04);
  border-color: var(--clr-green);
}
.se-callout-label {
  font-family: var(--font-ui);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  margin-bottom: var(--s2);
}
.se-callout--info .se-callout-label    { color: var(--clr-neon); }
.se-callout--warn .se-callout-label    { color: var(--clr-neon3); }
.se-callout--danger .se-callout-label  { color: var(--clr-neon2); }
.se-callout--success .se-callout-label { color: var(--clr-green); }

/* ── Exercise blocks (the 3 per article: Browser / Hacker) ─────── */
.se-exercise {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s5);
  margin: var(--s6) 0;
}
.se-exercise-header {
  display: flex;
  align-items: center;
  gap: var(--s3);
  margin-bottom: var(--s4);
  padding-bottom: var(--s3);
  border-bottom: 1px solid var(--border);
}
.se-exercise-icon {
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
}
.se-exercise--browser .se-exercise-icon { background: rgba(59,158,255,.15); }
.se-exercise--hacker  .se-exercise-icon { background: rgba(0,255,136,.12); }
.se-exercise--think   .se-exercise-icon { background: rgba(255,230,0,.1); }
.se-exercise-title {
  font-family: var(--font-ui);
  font-size: .8rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  font-weight: 700;
}
.se-exercise--browser .se-exercise-title { color: var(--clr-blue); }
.se-exercise--hacker  .se-exercise-title { color: var(--clr-green); }
.se-exercise--think   .se-exercise-title { color: var(--clr-neon3); }
.se-exercise-body { font-size: .9rem; color: var(--text); }
.se-exercise-body ol { margin: var(--s3) 0; }

/* ── Course progress header ──────────────────────────────────── */
.se-course-progress-bar {
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  padding: var(--s3) 0;
  position: sticky;
  top: calc(var(--header-h) + 32px);
  z-index: calc(var(--z-header) - 2);
  backdrop-filter: blur(8px);
}
.se-course-progress-inner {
  display: flex;
  align-items: center;
  gap: var(--s4);
}
.se-course-progress-label {
  font-family: var(--font-ui);
  font-size: .7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  white-space: nowrap;
  flex-shrink: 0;
}
.se-course-progress-track {
  flex: 1;
  height: 4px;
  background: var(--bg3);
  border-radius: 2px;
}
.se-course-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--clr-neon), var(--clr-neon4));
  border-radius: 2px;
  transition: width .8s ease;
  box-shadow: 0 0 10px rgba(0,255,231,.3);
}
.se-course-progress-pct {
  font-family: var(--font-mono);
  font-size: .7rem;
  color: var(--clr-neon);
  flex-shrink: 0;
}

/* ── Author box ──────────────────────────────────────────────── */
.se-author {
  display: flex;
  gap: var(--s5);
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--s5);
  margin-top: var(--s7);
}
.se-av {
  flex-shrink: 0;
}
.se-av img {
  width: 72px;
  height: 72px;
  border-radius: 50%;
  border: 2px solid var(--border);
  object-fit: cover;
}
.se-ai { flex: 1; }
.se-an {
  font-family: var(--font-display);
  font-size: .85rem;
  color: var(--text-bright);
  letter-spacing: 1px;
  margin-bottom: 2px;
}
.se-at {
  font-family: var(--font-ui);
  font-size: .7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--clr-neon);
  margin-bottom: var(--s3);
}
.se-ab {
  font-size: .875rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ── Related / Next lesson nav ───────────────────────────────── */
.se-post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s4);
  margin-top: var(--s7);
  padding-top: var(--s5);
  border-top: 1px solid var(--border);
}
.se-post-nav-item {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--s4);
  text-decoration: none;
  transition: border-color var(--t-fast), transform var(--t-fast), box-shadow var(--t-fast);
  display: flex;
  flex-direction: column;
  gap: var(--s1);
}
.se-post-nav-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}
.se-post-nav-dir {
  font-family: var(--font-ui);
  font-size: .65rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: var(--s1);
}
.se-post-nav-dir .arrow { color: var(--clr-neon); }
.se-post-nav-title {
  font-size: .9rem;
  color: var(--text-bright);
  font-family: var(--font-ui);
  font-weight: 600;
}
.se-post-nav-item--next { text-align: right; }

/* ── Social share ────────────────────────────────────────────── */
.se-social-share {
  display: flex;
  align-items: center;
  gap: var(--s2);
  margin-top: var(--s6);
  padding-top: var(--s5);
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
}
.se-share-label {
  font-family: var(--font-ui);
  font-size: .7rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-right: var(--s2);
}
.se-share-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--s1);
  padding: 5px 12px;
  border-radius: 20px;
  font-family: var(--font-ui);
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .5px;
  text-decoration: none;
  border: 1px solid var(--border);
  background: var(--bg2);
  color: var(--text-dim);
  transition: all var(--t-fast);
  cursor: pointer;
}
.se-share-btn:hover { border-color: var(--border-hover); color: var(--text-bright); }
.se-share-btn--xp {
  border-color: rgba(0,255,231,.2);
  color: var(--clr-neon);
  background: rgba(0,255,231,.06);
}
.se-share-btn--xp:hover { background: rgba(0,255,231,.12); }

/* ── Reading progress bar (top of viewport) ──────────────────── */
.se-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: var(--clr-neon);
  z-index: calc(var(--z-modal) + 1);
  box-shadow: 0 0 8px var(--clr-neon);
  transition: width .1s linear;
  pointer-events: none;
}

/* ══════════════════════════════════════════════════════════════
   ARTICLE REGISTER CTA (logged-out users)
   ══════════════════════════════════════════════════════════════ */
.se-article-reg-cta {
  margin: var(--s7, 40px) 0;
  background: linear-gradient(135deg, rgba(0,255,231,.06) 0%, rgba(123,47,255,.06) 100%);
  border: 1px solid rgba(0,255,231,.2);
  border-radius: var(--radius-lg, 8px);
  padding: var(--s5, 24px) var(--s6, 32px);
}
.se-article-reg-inner {
  display: flex;
  align-items: center;
  gap: var(--s4, 16px);
  flex-wrap: wrap;
}
.se-article-reg-icon {
  font-size: 2rem;
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(0,255,231,.5));
}
.se-article-reg-text {
  flex: 1;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.se-article-reg-text strong {
  font: 700 .95rem/1.3 var(--font-ui, monospace);
  color: var(--text-bright, #e8f4f8);
}
.se-article-reg-text span {
  font: 400 .8rem/1.4 var(--font-ui, monospace);
  color: var(--text-dim, #8899aa);
}
.se-article-reg-btn { white-space: nowrap; flex-shrink: 0; }

@media (max-width: 600px) {
  .se-article-reg-inner { flex-direction: column; text-align: center; }
  .se-article-reg-btn { width: 100%; text-align: center; }
}