/* ============================================================
   VibeLab Blog Styles
   Covers: Blog Listing (blogs.html) + Blog Reader (blog.html)
   ============================================================ */

/* ---------- Custom Properties ---------- */
:root {
  --blog-max-width: 1200px;
  --blog-reader-width: 720px;
  --blog-card-radius: var(--radius);
  --blog-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --blog-code-bg: #1a1a2e;
  --blog-code-header: #12121f;
  --blog-code-text: #e2e8f0;
  --blog-callout-bg: rgba(200, 255, 0, 0.06);
  --blog-glow: 0 0 0 3px rgba(200, 255, 0, 0.25);
}

/* ============================================================
   1. BLOG LISTING PAGE (Learn)
   ============================================================ */

/* ---------- Learn Hero (matches home page style) ---------- */
.learn-hero {
  position: relative;
  padding: 72px 0 56px;
  overflow: hidden;
  isolation: isolate;
}

/* Floating mini-icons over the animated gradient */
.learn-hero-icons {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.learn-hero-icons .lhi {
  position: absolute;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(17, 17, 17, 0.32);
  will-change: transform;
}

.learn-hero-icons .lhi svg {
  width: 100%;
  height: 100%;
  display: block;
}

.lhi--1 { width: 18px; height: 18px; top: 22%;  left: 8%;  animation: lhi-drift-a 14s ease-in-out infinite; }
.lhi--2 { width: 20px; height: 20px; top: 68%;  left: 14%; animation: lhi-drift-b 17s ease-in-out infinite; color: rgba(17,17,17,0.28); }
.lhi--3 { width: 14px; height: 14px; top: 18%;  left: 82%; animation: lhi-drift-c 19s ease-in-out infinite; color: rgba(17,17,17,0.22); }
.lhi--4 { width: 16px; height: 16px; top: 75%;  left: 78%; animation: lhi-drift-d 16s ease-in-out infinite; color: rgba(124,58,237,0.32); }
.lhi--5 { width: 16px; height: 16px; top: 42%;  left: 4%;  animation: lhi-drift-b 21s ease-in-out infinite; color: rgba(17,17,17,0.2); }
.lhi--6 { width: 18px; height: 18px; top: 12%;  left: 46%; animation: lhi-drift-c 18s ease-in-out infinite; color: rgba(17,17,17,0.22); }
.lhi--7 { width: 14px; height: 14px; top: 82%;  left: 48%; animation: lhi-drift-a 22s ease-in-out infinite; color: rgba(168,217,0,0.9); }
.lhi--8 { width: 14px; height: 14px; top: 30%;  left: 92%; animation: lhi-drift-d 20s ease-in-out infinite; color: rgba(17,17,17,0.24); }

@keyframes lhi-drift-a {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(10px, -12px) rotate(8deg); }
}
@keyframes lhi-drift-b {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(-12px, 14px) rotate(-6deg); }
}
@keyframes lhi-drift-c {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(14px, 10px) rotate(10deg); }
}
@keyframes lhi-drift-d {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50%      { transform: translate(-10px, -14px) rotate(-8deg); }
}

@media (max-width: 640px) {
  .lhi--3, .lhi--5, .lhi--8 { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  .learn-hero-icons .lhi { animation: none; }
}

.learn-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.learn-hero h1 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: clamp(2.6rem, 6vw, 4.2rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.08;
  color: var(--text);
  margin-bottom: 22px;
}

.learn-hero h1 .highlight {
  background: var(--accent);
  padding: 0 10px;
  border-radius: 8px;
  display: inline;
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}

.learn-hero-sub {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Learn Container ---------- */
.learn-container {
  max-width: var(--blog-max-width);
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 48px);
}

/* ---------- Learn Section ---------- */
.learn-section {
  padding: 64px 0;
}

.learn-section--alt {
  background: var(--bg-alt);
}

/* ---------- Start Here Path (Premium) ---------- */
.learn-path-header {
  text-align: center;
  margin-bottom: 48px;
}

.learn-path-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 14px;
  position: relative;
  padding-left: 28px;
}

.learn-path-kicker::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 20px;
  height: 1.5px;
  background: var(--text-muted);
  transform: translateY(-50%);
}

.learn-path-header h2 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 14px;
}

.learn-path-header h2 em {
  font-style: italic;
  font-weight: 500;
  color: var(--text-secondary);
}

.learn-path-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.65;
}

/* ---------- Level Chooser (Editorial cards) ---------- */
.learn-level-chooser {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 1020px;
  margin: 0 auto 64px;
}

.learn-level-card {
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 28px 24px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  cursor: pointer;
  text-align: left;
  font-family: inherit;
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1), border-color 0.28s ease, box-shadow 0.28s ease, background 0.28s ease, color 0.28s ease;
  position: relative;
  overflow: hidden;
  min-height: 210px;
}

.learn-level-card::before {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
}

.learn-level-card:hover {
  transform: translateY(-4px);
  border-color: var(--text);
  box-shadow: 0 14px 40px rgba(0,0,0,0.08);
}

.learn-level-card:hover::before {
  transform: scaleX(1);
}

.learn-level-card:hover .learn-level-arrow {
  transform: translate(6px, -6px);
  color: var(--text);
}

.learn-level-card.selected {
  border-color: var(--text);
  background: var(--text);
  color: #fff;
}

.learn-level-card.selected::before { transform: scaleX(1); }

.learn-level-card.selected .learn-level-num {
  color: var(--accent);
  -webkit-text-stroke: 0;
}

.learn-level-card.selected .learn-level-meta h3 { color: #fff; }

.learn-level-card.selected .learn-level-meta p { color: rgba(255,255,255,0.7); }

.learn-level-card.selected .learn-level-arrow {
  background: var(--accent);
  color: var(--text);
  border-color: var(--accent);
}

.learn-level-num {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 3.2rem;
  font-weight: 700;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--border);
  letter-spacing: -0.04em;
  transition: color 0.28s ease, -webkit-text-stroke-color 0.28s ease;
}

.learn-level-card:hover .learn-level-num {
  -webkit-text-stroke-color: var(--text);
  color: var(--text);
  -webkit-text-stroke: 0;
}

.learn-level-meta {
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.learn-level-meta h3 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  line-height: 1.25;
  transition: color 0.28s ease;
}

.learn-level-meta p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.55;
  transition: color 0.28s ease;
}

.learn-level-arrow {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  background: transparent;
  transition: transform 0.28s cubic-bezier(0.4,0,0.2,1), background 0.28s ease, color 0.28s ease, border-color 0.28s ease;
}

/* ---------- Race Track ---------- */
.learn-track-wrap {
  max-width: 880px;
  margin: 0 auto;
  animation: blogFadeInUp 0.4s ease both;
}

.learn-track-header {
  text-align: center;
  margin-bottom: 36px;
}

.learn-track-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 10px;
  position: relative;
  padding-left: 28px;
}

.learn-track-kicker::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 20px;
  height: 1.5px;
  background: var(--accent-dark);
  transform: translateY(-50%);
}

.learn-track-header h3 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
}

.learn-track {
  display: flex;
  flex-direction: column;
  gap: 14px;
  position: relative;
  padding: 8px 0 8px 0;
  max-width: 720px;
  margin: 0 auto;
}

/* Thin vertical rail running through the numbered nodes */
.learn-track::before {
  content: '';
  position: absolute;
  left: 19px;
  top: 18px;
  bottom: 18px;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(17,17,17,0.22) 0,
    rgba(17,17,17,0.22) 4px,
    transparent 4px,
    transparent 8px
  );
  pointer-events: none;
}

.learn-track-stop {
  display: flex;
  align-items: stretch;
  gap: 18px;
  width: 100%;
  position: relative;
}

.learn-stop-node {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
  color: var(--text-muted);
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--border);
  border-radius: 50%;
  position: relative;
  z-index: 2;
  transition: background 0.22s ease, color 0.22s ease, border-color 0.22s ease;
  align-self: center;
}

.learn-track-stop:hover .learn-stop-node {
  background: var(--text);
  color: var(--accent);
  border-color: var(--text);
}

.learn-stop-card {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  flex: 1;
  min-width: 0;
  box-shadow: 0 1px 2px rgba(0,0,0,0.03);
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
  align-items: center;
  position: relative;
  z-index: 2;
}

.learn-stop-card:hover {
  transform: translateY(-2px);
  border-color: rgba(17,17,17,0.35);
  box-shadow: 0 8px 24px rgba(0,0,0,0.06);
}

.learn-stop-card:hover .learn-stop-arrow {
  transform: translateX(3px);
  color: var(--text);
}

.learn-stop-body {
  flex: 1;
  min-width: 0;
}

.learn-stop-body h3 {
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.learn-stop-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.learn-stop-meta .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
}

.learn-stop-arrow {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  color: var(--text-muted);
  transition: transform 0.22s ease, color 0.22s ease;
}

.learn-track-empty {
  text-align: center;
  padding: 40px 24px;
  color: var(--text-muted);
  font-size: 0.92rem;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: 14px;
}

/* ---------- Filter Controls ---------- */
.learn-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.learn-controls-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.learn-controls h2 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  white-space: nowrap;
}

.learn-row-title {
  font-family: 'Inter', -apple-system, sans-serif;
}

.learn-stop-body h3 {
  font-family: 'Inter', -apple-system, sans-serif;
}

.learn-tab-pills {
  display: flex;
  align-items: center;
  gap: 4px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 4px;
  flex-shrink: 0;
}

.learn-tab {
  padding: 7px 14px;
  border: none;
  background: none;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.learn-tab.active,
.learn-tab:hover {
  background: var(--text);
  color: #fff;
}

.learn-sort {
  appearance: none;
  -webkit-appearance: none;
  padding: 8px 36px 8px 16px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: #fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23636363' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E") no-repeat right 14px center;
  font-family: 'Inter', sans-serif;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: border-color 0.15s;
}

.learn-sort:hover,
.learn-sort:focus {
  border-color: var(--text);
  outline: none;
}

/* ---------- Article List (1 per row) ---------- */
.learn-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.learn-row {
  display: flex;
  align-items: stretch;
  gap: 20px;
  padding: 14px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  color: inherit;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  animation: blogFadeInUp 0.4s ease both;
  position: relative;
}

.learn-row:hover {
  transform: translateY(-2px);
  border-color: var(--text);
  box-shadow: 0 6px 20px rgba(0,0,0,0.08);
}

.learn-row:hover .learn-row-arrow {
  transform: translateX(4px);
  color: var(--text);
}

.learn-row-thumb {
  flex-shrink: 0;
  width: 160px;
  height: 96px;
  border-radius: 10px;
  overflow: hidden;
  background: var(--bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.learn-row-thumb svg {
  width: 100%;
  height: 100%;
  display: block;
}

.learn-row-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.learn-row-top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.learn-row-cat {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
}

.learn-row-difficulty {
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.learn-row-difficulty--beginner {
  background: rgba(62, 207, 142, 0.18);
  color: #059669;
}

.learn-row-difficulty--intermediate {
  background: rgba(245, 158, 11, 0.18);
  color: #c2580e;
}

.learn-row-difficulty--advanced {
  background: rgba(239, 68, 68, 0.18);
  color: #dc2626;
}

.learn-row-title {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 4px;
  letter-spacing: -0.01em;
}

.learn-row-excerpt {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.learn-row-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.76rem;
  color: var(--text-muted);
}

.learn-row-meta .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
}

.learn-row-arrow {
  align-self: center;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.18s ease, color 0.18s ease;
  padding-right: 8px;
}

/* ---------- Empty State ---------- */
.learn-empty {
  text-align: center;
  padding: 60px 24px;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Responsive (Learn page) ---------- */
@media (max-width: 820px) {
  .learn-level-chooser {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .learn-track {
    padding-left: 0;
  }
  .learn-track-stop { gap: 14px; }
  .learn-stop-node { width: 34px; height: 34px; font-size: 12px; }
  .learn-track::before { left: 17px; }
  .learn-stop-card { padding: 14px 16px; }
}

@media (max-width: 640px) {
  .learn-row {
    flex-direction: column;
    gap: 0;
    padding: 0;
    overflow: hidden;
  }
  .learn-row-thumb {
    width: 100%;
    height: 160px;
    border-radius: 0;
  }
  .learn-row-body {
    padding: 16px 18px;
  }
  .learn-row-arrow {
    display: none;
  }
  .learn-controls {
    flex-direction: column;
    align-items: stretch;
  }
  .learn-controls-left {
    flex-direction: column;
    align-items: stretch;
  }
  .learn-tab-pills {
    overflow-x: auto;
    justify-content: flex-start;
  }
  .learn-path-header h2 {
    font-size: 1.6rem;
  }
}

/* ---------- Legacy card styles (used by blog.html Related Articles) ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: var(--blog-max-width);
  margin: 0 auto 64px;
  padding: 0 24px;
}

.blog-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--blog-card-radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--blog-transition), box-shadow var(--blog-transition);
  animation: blogFadeInUp 0.4s ease both;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}

.blog-card-hero {
  position: relative;
  height: 160px;
  overflow: hidden;
}

.blog-card-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: rgba(0,0,0,0.5);
  color: #fff;
  backdrop-filter: blur(6px);
}

.blog-card-body {
  padding: 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-card-body .blog-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-body .blog-card-excerpt {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 12px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ============================================================
   2. BLOG READER PAGE
   ============================================================ */

/* ---------- Back Link ---------- */
.blog-back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  max-width: var(--blog-max-width);
  margin: 24px auto 0;
  padding: 0 24px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: color var(--blog-transition);
}

.blog-back-link:hover {
  color: var(--text);
}

.blog-back-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--blog-transition);
}

.blog-back-link:hover svg {
  transform: translateX(-3px);
}

/* ---------- Reader Hero ---------- */
.blog-reader-hero {
  max-width: 100%;
  padding: 64px 24px 56px;
  text-align: center;
  background: linear-gradient(180deg, var(--bg-alt) 0%, var(--bg) 100%);
}

.blog-reader-hero .blog-reader-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 60px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.blog-reader-hero h1 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  max-width: var(--blog-reader-width);
  margin: 0 auto 20px;
  line-height: 1.2;
}

.blog-reader-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.blog-reader-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.blog-reader-meta .meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--text-muted);
}

/* ---------- Reader Content ---------- */
.blog-reader {
  max-width: var(--blog-reader-width);
  margin: 0 auto;
  padding: 48px 24px 80px;
}

.blog-reader-content h2 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin: 48px 0 16px;
  padding-left: 16px;
  border-left: 3px solid var(--accent);
  line-height: 1.3;
}

.blog-reader-content h3 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  margin: 36px 0 12px;
  padding-left: 16px;
  border-left: 3px solid var(--border);
  line-height: 1.35;
}

.blog-reader-content p {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.blog-reader-content a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--blog-transition);
}

.blog-reader-content a:hover {
  color: var(--text);
}

.blog-reader-content strong {
  color: var(--text);
  font-weight: 600;
}

/* Lists */
.blog-reader-content .blog-list,
.blog-reader-content ul,
.blog-reader-content ol {
  margin: 0 0 20px 0;
  padding-left: 0;
  list-style: none;
}

.blog-reader-content .blog-list li,
.blog-reader-content ul li,
.blog-reader-content ol li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.blog-reader-content .blog-list li::before,
.blog-reader-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-dark);
}

.blog-reader-content ol {
  counter-reset: blog-ol;
}

.blog-reader-content ol li::before {
  content: counter(blog-ol);
  counter-increment: blog-ol;
  position: absolute;
  left: 0;
  top: 0;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--accent-dark);
  width: 20px;
  text-align: center;
}

/* Code Blocks */
.code-block {
  margin: 24px 0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--blog-code-bg);
  box-shadow: var(--shadow-md);
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: var(--blog-code-header);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.code-header .code-label {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.78rem;
  color: rgba(226, 232, 240, 0.6);
  font-weight: 500;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  background: transparent;
  color: rgba(226, 232, 240, 0.6);
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--blog-transition);
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--blog-code-text);
  border-color: rgba(255, 255, 255, 0.2);
}

.copy-btn.copied {
  color: var(--accent);
  border-color: rgba(200, 255, 0, 0.3);
}

.code-block pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.code-block code {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--blog-code-text);
  tab-size: 2;
}

/* Inline code */
.blog-reader-content code:not(.code-block code) {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.88em;
  padding: 2px 7px;
  border-radius: 6px;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
}

/* Callout / Tip Box */
.blog-callout {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 4px solid var(--accent);
  background: var(--blog-callout-bg);
  border-radius: 0 12px 12px 0;
}

.blog-callout .callout-label {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-dark);
  margin-bottom: 6px;
}

.blog-callout p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.65;
}

/* Blockquote */
.blog-quote,
.blog-reader-content blockquote {
  margin: 28px 0;
  padding: 20px 24px;
  border-left: 4px solid var(--text);
  background: transparent;
  font-size: 1.1rem;
  font-style: italic;
  line-height: 1.7;
  color: var(--text-secondary);
}

.blog-quote p,
.blog-reader-content blockquote p {
  margin-bottom: 0;
  font-size: inherit;
  line-height: inherit;
}

/* Image Placeholder */
.blog-image-placeholder {
  margin: 32px 0;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  background: linear-gradient(135deg, #e8e8ec 0%, #d4d4d8 50%, #c8c8ce 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.blog-image-placeholder span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
  background: rgba(255, 255, 255, 0.7);
  padding: 6px 16px;
  border-radius: 8px;
}

.blog-image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
}

/* Prompt Example */
.prompt-example {
  margin: 24px 0;
  padding: 20px 24px;
  border: 1.5px solid var(--border);
  border-radius: 12px;
  background: var(--bg-alt);
}

.prompt-example .prompt-label {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

.prompt-example p,
.prompt-example .prompt-text {
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text);
  margin-bottom: 0;
}

/* Comparison Table */
.comparison-table {
  width: 100%;
  margin: 28px 0;
  border-collapse: separate;
  border-spacing: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  font-size: 0.9rem;
}

.comparison-table thead th {
  background: var(--bg-alt);
  padding: 14px 20px;
  text-align: left;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.comparison-table tbody td {
  padding: 12px 20px;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-light);
  line-height: 1.5;
}

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

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

/* ---------- Reader Navigation ---------- */
.blog-reader-nav {
  display: flex;
  gap: 16px;
  max-width: var(--blog-reader-width);
  margin: 0 auto;
  padding: 0 24px 48px;
  border-top: 1px solid var(--border);
  padding-top: 32px;
}

.blog-reader-nav a {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-decoration: none;
  transition: all var(--blog-transition);
}

.blog-reader-nav a:hover {
  border-color: var(--text);
  box-shadow: var(--shadow-sm);
}

.blog-reader-nav a .nav-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.blog-reader-nav a .nav-title {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.blog-reader-nav a.next {
  text-align: right;
}

/* ---------- Related Posts ---------- */
.blog-related {
  max-width: var(--blog-max-width);
  margin: 0 auto;
  padding: 48px 24px 80px;
  border-top: 1px solid var(--border);
}

.blog-related h2 {
  font-family: 'Inter', -apple-system, sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 24px;
  text-align: center;
}

.blog-related .blog-grid {
  margin-bottom: 0;
  padding: 0;
}

/* ============================================================
   3. ANIMATIONS
   ============================================================ */

@keyframes blogFadeInUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================================
   4. RESPONSIVE
   ============================================================ */

/* --- Learn listing page --- */
@media (max-width: 768px) {
  .learn-hero {
    padding: 80px 20px 48px;
  }

  .learn-path-grid {
    grid-template-columns: 1fr;
  }

  .learn-controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .learn-controls-left {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }

  .learn-tab-pills {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    max-width: 100%;
  }

  .learn-tab-pills::-webkit-scrollbar {
    display: none;
  }

  .learn-grid {
    grid-template-columns: 1fr;
  }

  .learn-card {
    flex-direction: column;
  }

  .learn-card-thumb {
    width: 100%;
    min-height: 140px;
    height: 140px;
  }

  .learn-card-thumb-bg {
    border-radius: 14px 14px 0 0;
  }

  .learn-card-learnings {
    display: none;
  }
}

@media (max-width: 480px) {
  .learn-hero h1 {
    font-size: 1.75rem;
  }

  .learn-path-card {
    padding: 16px;
  }
}

/* --- Blog reader page --- */
@media (max-width: 768px) {
  .blog-reader-hero h1 {
    font-size: 1.85rem;
  }

  .blog-reader-content h2 {
    font-size: 1.3rem;
    margin-top: 40px;
  }

  .blog-reader-content h3 {
    font-size: 1.1rem;
  }

  .blog-reader-content p {
    font-size: 1rem;
  }

  .blog-reader-nav {
    flex-direction: column;
  }

  .blog-reader-nav a.next {
    text-align: left;
  }

  .blog-related .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .blog-grid {
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .blog-reader-hero {
    padding: 48px 20px 40px;
  }

  .blog-reader-hero h1 {
    font-size: 1.55rem;
  }

  .blog-reader {
    padding: 32px 20px 60px;
  }

  .blog-reader-meta {
    flex-wrap: wrap;
    gap: 8px;
  }

  .comparison-table {
    font-size: 0.82rem;
  }

  .comparison-table thead th,
  .comparison-table tbody td {
    padding: 10px 14px;
  }

  .blog-related .blog-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================================
   5. PRINT STYLES
   ============================================================ */

@media print {
  .learn-hero,
  .learn-controls,
  .learn-section--alt,
  .blog-back-link,
  .blog-reader-nav,
  .blog-related,
  .copy-btn,
  nav,
  footer {
    display: none !important;
  }

  .blog-reader-hero {
    background: none !important;
    padding: 24px 0;
  }

  .blog-reader-hero h1 {
    font-size: 1.8rem;
  }

  .blog-reader {
    max-width: 100%;
    padding: 0;
  }

  .blog-reader-content p,
  .blog-reader-content li {
    font-size: 11pt;
    line-height: 1.6;
    color: #000;
  }

  .blog-reader-content h2,
  .blog-reader-content h3 {
    break-after: avoid;
    color: #000;
  }

  .code-block {
    background: #f5f5f5 !important;
    border: 1px solid #ddd;
    box-shadow: none;
  }

  .code-block code {
    color: #000 !important;
  }

  .code-header {
    background: #eee !important;
  }

  .blog-callout {
    background: #fafafa !important;
    border-left-color: #999 !important;
  }

  .blog-image-placeholder {
    border: 1px solid #ccc;
    background: #f5f5f5 !important;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}