/* ============================================================
   AI Blog — Modern Landing-style UI
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --hero-bg:         #0a0a1a;
  --hero-glow-1:     rgba(99,102,241,0.45);
  --hero-glow-2:     rgba(139,92,246,0.3);

  --grad-primary:    linear-gradient(135deg, #6366f1, #8b5cf6);
  --grad-cta:        linear-gradient(135deg, #6366f1, #8b5cf6);
  --color-primary:   #6366f1;
  --color-accent:    #8b5cf6;

  --bg-page:         #f8f9ff;
  --bg-card:         #ffffff;
  --bg-card-hover:   #fafbff;
  --text-heading:    #0f0f1a;
  --text-body:       #374151;
  --text-muted:      #9ca3af;
  --border:          rgba(99,102,241,0.1);
  --border-hover:    rgba(99,102,241,0.25);

  --radius-sm:  8px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  28px;

  --t-base:  0.22s ease;
  --t-slow:  0.4s ease;

  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --max-w:    1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--bg-page);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.65;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Reading Progress ── */
#reading-progress {
  position: fixed; top: 0; left: 0; z-index: 999;
  height: 3px; width: 0%;
  background: var(--grad-primary);
  transition: width 0.1s linear;
}

/* ─────────────────────────────────────────────
   NAVBAR
───────────────────────────────────────────── */
.blog-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 24px;
  transition: background var(--t-base), backdrop-filter var(--t-base), box-shadow var(--t-base);
}
.blog-header.scrolled {
  background: rgba(10,10,26,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06);
}
.blog-header-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
  gap: 24px;
}
.blog-logo {
  font-size: 1.15rem; font-weight: 800;
  background: linear-gradient(135deg, #fff 40%, #818cf8);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.blog-nav {
  display: flex; list-style: none; align-items: center; gap: 6px;
}
.blog-nav a {
  color: rgba(255,255,255,0.65);
  font-size: 0.88rem; font-weight: 500;
  padding: 6px 14px; border-radius: 999px;
  transition: color var(--t-base), background var(--t-base);
}
.blog-nav a:hover { color: #fff; background: rgba(255,255,255,0.08); text-decoration: none; }
.btn-gradient {
  background: var(--grad-primary);
  color: #fff !important;
  padding: 8px 20px !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
  font-size: 0.85rem;
  box-shadow: 0 4px 16px rgba(99,102,241,0.4);
  transition: filter var(--t-base), transform var(--t-base), box-shadow var(--t-base) !important;
}
.btn-gradient:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(99,102,241,0.5);
  text-decoration: none !important;
}

/* ─────────────────────────────────────────────
   HERO
───────────────────────────────────────────── */
.blog-hero {
  background: var(--hero-bg);
  min-height: 620px;
  display: flex; align-items: center; justify-content: center;
  text-align: center;
  padding: 140px 24px 100px;
  position: relative;
  overflow: hidden;
}

/* Glowing orbs */
.blog-hero::before,
.blog-hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  pointer-events: none;
}
.blog-hero::before {
  width: 600px; height: 600px;
  top: -150px; left: 50%;
  transform: translateX(-60%);
  background: var(--hero-glow-1);
  opacity: 0.6;
}
.blog-hero::after {
  width: 400px; height: 400px;
  bottom: -100px; right: 10%;
  background: var(--hero-glow-2);
  opacity: 0.5;
}

/* Grid lines overlay */
.blog-hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(99,102,241,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.07) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 0%, black 40%, transparent 100%);
}

.blog-hero-inner {
  position: relative; z-index: 2;
  max-width: 780px; margin: 0 auto;
  display: flex; flex-direction: column; align-items: center; gap: 24px;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  color: #a5b4fc;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 0.8rem; font-weight: 600;
  letter-spacing: 0.03em;
  backdrop-filter: blur(8px);
}
.hero-badge-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #818cf8;
  box-shadow: 0 0 6px #818cf8;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.85); }
}

.blog-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: -0.03em;
}
.blog-hero h1 .gradient-text {
  background: linear-gradient(135deg, #818cf8, #c4b5fd, #f0abfc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.blog-hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.55);
  max-width: 540px;
  line-height: 1.7;
}
.hero-cta {
  display: flex; gap: 12px; align-items: center; flex-wrap: wrap; justify-content: center;
  margin-top: 8px;
}
.hero-btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--grad-primary);
  color: #fff;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 0.95rem; font-weight: 700;
  box-shadow: 0 8px 32px rgba(99,102,241,0.45);
  transition: filter var(--t-base), transform var(--t-base), box-shadow var(--t-base);
  text-decoration: none;
}
.hero-btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(99,102,241,0.55);
  text-decoration: none;
  color: #fff;
}
.hero-btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.7);
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 0.9rem; font-weight: 500;
  border: 1px solid rgba(255,255,255,0.12);
  transition: all var(--t-base);
  text-decoration: none;
}
.hero-btn-secondary:hover {
  background: rgba(255,255,255,0.07);
  color: #fff;
  text-decoration: none;
}

/* Hero stats bar */
.hero-stats {
  display: flex; gap: 32px; align-items: center;
  padding-top: 8px;
  border-top: 1px solid rgba(255,255,255,0.07);
  margin-top: 8px;
  width: 100%;
  justify-content: center;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
}
.hero-stat-num {
  display: block;
  font-size: 1.5rem; font-weight: 800; color: #fff;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #a5b4fc, #c4b5fd);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-stat-label {
  font-size: 0.75rem; color: rgba(255,255,255,0.4); font-weight: 500;
}

/* ─────────────────────────────────────────────
   CATEGORY FILTER
───────────────────────────────────────────── */
.category-filter {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center;
  padding: 28px 24px 4px;
  max-width: var(--max-w); margin: 0 auto;
}
.cat-pill {
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 0.82rem; font-weight: 600;
  border: 1.5px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--t-base);
  letter-spacing: 0.01em;
}
.cat-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: rgba(99,102,241,0.06);
}
.cat-pill.active {
  background: var(--grad-primary);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 4px 14px rgba(99,102,241,0.35);
}

/* ─────────────────────────────────────────────
   POSTS GRID
───────────────────────────────────────────── */
.posts-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 32px 24px 80px;
}

.section-label {
  text-align: center;
  font-size: 0.75rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.section-title {
  text-align: center;
  font-size: clamp(1.6rem, 4vw, 2.4rem); font-weight: 800;
  color: var(--text-heading); letter-spacing: -0.02em; line-height: 1.2;
  margin-bottom: 8px;
}
.section-desc {
  text-align: center;
  color: var(--text-muted); font-size: 1rem; max-width: 520px; margin: 0 auto 40px;
  line-height: 1.7;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* First card — featured wide */
.posts-grid .post-card:first-child {
  grid-column: span 3;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  overflow: hidden;
  align-items: stretch;
}
.posts-grid .post-card:first-child .post-card-image {
  height: 100%; min-height: 260px;
}
.posts-grid .post-card:first-child .post-card-body {
  padding: 36px 32px;
  display: flex; flex-direction: column; justify-content: center;
}
.posts-grid .post-card:first-child .post-card-title { font-size: 1.6rem; }

/* Regular cards */
.post-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform var(--t-base), box-shadow var(--t-base), border-color var(--t-base);
  display: flex; flex-direction: column;
  text-decoration: none;
  color: inherit;
}
.post-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 48px rgba(99,102,241,0.12);
  border-color: var(--border-hover);
  text-decoration: none;
  color: inherit;
}

.post-card-img-link { display: block; flex-shrink: 0; }
.post-card-image {
  width: 100%; height: 200px;
  overflow: hidden; flex-shrink: 0;
}
.post-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow); }
.post-card:hover .post-card-image img { transform: scale(1.05); }

/* Gradient placeholder when no image */
.post-card-image.placeholder {
  background: linear-gradient(135deg, var(--grad-from, #6366f1), var(--grad-to, #8b5cf6));
  display: flex; align-items: center; justify-content: center;
}
.post-card-image.placeholder span {
  font-size: 3rem; opacity: 0.35;
}

.post-card-body {
  padding: 22px 22px 20px;
  flex: 1; display: flex; flex-direction: column; gap: 10px;
}
.post-card-meta {
  display: flex; align-items: center; gap: 10px;
  flex-wrap: wrap;
}
.post-card-cat {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-primary);
  background: rgba(99,102,241,0.08);
  padding: 3px 10px; border-radius: 999px;
}
.post-card-date {
  font-size: 0.75rem; color: var(--text-muted); font-weight: 500;
}
.post-card-read {
  font-size: 0.72rem; color: var(--text-muted);
}
.post-card-title {
  font-size: 1.05rem; font-weight: 700;
  color: var(--text-heading);
  line-height: 1.35;
  letter-spacing: -0.01em;
  transition: color var(--t-base);
}
.post-card:hover .post-card-title { color: var(--color-primary); }
.post-card-excerpt {
  font-size: 0.85rem; color: var(--text-muted); line-height: 1.65;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.post-card-footer {
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid rgba(0,0,0,0.05);
  display: flex; align-items: center; justify-content: space-between;
}
.post-card-read-link {
  font-size: 0.8rem; font-weight: 600; color: var(--color-primary);
  display: flex; align-items: center; gap: 4px;
  transition: gap var(--t-base);
}
.post-card:hover .post-card-read-link { gap: 8px; }
.post-card-likes {
  font-size: 0.78rem; color: var(--text-muted);
  display: flex; align-items: center; gap: 4px;
}

/* Empty state */
.posts-empty {
  grid-column: 1/-1;
  text-align: center; padding: 80px 20px;
}
.posts-empty-icon {
  font-size: 4rem; margin-bottom: 16px; display: block;
  opacity: 0.4;
}
.posts-empty h3 { font-size: 1.3rem; font-weight: 700; color: var(--text-heading); margin-bottom: 8px; }
.posts-empty p  { color: var(--text-muted); font-size: 0.95rem; }

/* Load more */
.load-more-wrap { text-align: center; margin-top: 40px; }
.btn-load-more {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 32px;
  border-radius: 999px;
  background: transparent;
  border: 1.5px solid var(--border-hover);
  color: var(--color-primary); font-size: 0.9rem; font-weight: 600;
  cursor: pointer; transition: all var(--t-base);
}
.btn-load-more:hover {
  background: var(--grad-primary);
  border-color: transparent; color: #fff;
  box-shadow: 0 8px 24px rgba(99,102,241,0.35);
  transform: translateY(-1px);
}
.btn-load-more.loading { opacity: 0.6; pointer-events: none; }

/* ─────────────────────────────────────────────
   FOOTER
───────────────────────────────────────────── */
.blog-footer {
  background: #0a0a1a;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 32px 24px;
  text-align: center;
  color: rgba(255,255,255,0.3);
  font-size: 0.82rem;
}

/* ─────────────────────────────────────────────
   SINGLE POST — reused elements
───────────────────────────────────────────── */
.post-hero {
  background: var(--hero-bg);
  padding: 120px 24px 80px;
  position: relative; overflow: hidden; text-align: center;
}
.post-hero::before {
  content: '';
  position: absolute; border-radius: 50%; filter: blur(80px); pointer-events: none;
  width: 500px; height: 400px; top: -80px; left: 50%; transform: translateX(-50%);
  background: rgba(99,102,241,0.35); opacity: 0.6;
}
.post-hero-inner { position: relative; z-index: 2; max-width: 820px; margin: 0 auto; }
.post-hero-cat {
  display: inline-block; margin-bottom: 18px;
  font-size: 0.75rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em;
  color: #a5b4fc;
  background: rgba(99,102,241,0.18);
  padding: 5px 14px; border-radius: 999px;
}
.post-hero h1 {
  font-size: clamp(1.8rem, 5vw, 3rem); font-weight: 900;
  color: #fff; line-height: 1.15; letter-spacing: -0.025em; margin-bottom: 16px;
}
.post-hero-meta {
  display: flex; align-items: center; gap: 16px; justify-content: center;
  flex-wrap: wrap; color: rgba(255,255,255,0.45); font-size: 0.82rem;
}
.post-hero-meta span { display: flex; align-items: center; gap: 5px; }

.post-wrapper {
  max-width: var(--max-w); margin: 0 auto;
  padding: 48px 24px 80px;
  display: grid; grid-template-columns: 1fr 300px; gap: 48px;
  align-items: start;
}
.post-content { min-width: 0; }

/* Post body typography */
.post-body { line-height: 1.8; color: var(--text-body); }
.post-body h2 { font-size: 1.55rem; font-weight: 800; color: var(--text-heading); margin: 2.2em 0 0.8em; letter-spacing: -0.02em; }
.post-body h3 { font-size: 1.2rem; font-weight: 700; color: var(--text-heading); margin: 1.8em 0 0.6em; }
.post-body p  { margin-bottom: 1.2em; }
.post-body ul, .post-body ol { margin: 1em 0 1em 1.5em; }
.post-body li { margin-bottom: 0.5em; }
.post-body strong { color: var(--text-heading); font-weight: 700; }
.post-body a  { color: var(--color-primary); font-weight: 500; }
.post-body a:hover { text-decoration: underline; }
.post-body blockquote {
  border-left: 3px solid var(--color-primary); margin: 1.5em 0;
  padding: 12px 20px; background: rgba(99,102,241,0.05); border-radius: 0 8px 8px 0;
  color: var(--text-body); font-style: italic;
}

/* FAQ */
.faq-section { margin-top: 48px; }
.faq-section h2 { font-size: 1.4rem; font-weight: 800; color: var(--text-heading); margin-bottom: 20px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius-md); margin-bottom: 10px; overflow: hidden; }
.faq-question {
  width: 100%; text-align: left; padding: 16px 20px;
  background: transparent; border: none; cursor: pointer;
  font-size: 0.95rem; font-weight: 600; color: var(--text-heading);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  transition: background var(--t-base);
}
.faq-question:hover { background: rgba(99,102,241,0.04); }
.faq-question.open { color: var(--color-primary); }
.faq-chevron { width: 18px; height: 18px; flex-shrink: 0; transition: transform var(--t-base); }
.faq-question.open .faq-chevron { transform: rotate(180deg); }
.faq-answer { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height var(--t-slow), padding var(--t-base); }
.faq-answer.open { max-height: 600px; padding: 0 20px 16px; }
.faq-answer p { font-size: 0.9rem; color: var(--text-body); line-height: 1.7; }

/* Sidebar */
.post-sidebar { position: sticky; top: 88px; display: flex; flex-direction: column; gap: 20px; }
.sidebar-widget { background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md); padding: 20px; }
.sidebar-widget h3 { font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--text-muted); margin-bottom: 14px; }

/* ToC */
.toc-list { list-style: none; display: flex; flex-direction: column; gap: 2px; }
.toc-list a {
  font-size: 0.82rem; color: var(--text-muted); display: block;
  padding: 5px 10px; border-radius: 6px; transition: all var(--t-base); font-weight: 500;
  border-left: 2px solid transparent;
}
.toc-list a:hover, .toc-list a.active {
  color: var(--color-primary); background: rgba(99,102,241,0.06);
  border-left-color: var(--color-primary); text-decoration: none;
}
.toc-list .toc-h3 { padding-left: 22px; }

/* CTA block */
.post-cta {
  background: var(--hero-bg);
  border-radius: var(--radius-xl);
  padding: 40px 32px;
  text-align: center;
  position: relative; overflow: hidden;
  margin: 48px 0;
}
.post-cta::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(99,102,241,0.3), rgba(139,92,246,0.2));
  pointer-events: none;
}
.post-cta-inner { position: relative; z-index: 2; }
.post-cta h2  { font-size: 1.6rem; font-weight: 800; color: #fff; margin-bottom: 10px; }
.post-cta p   { color: rgba(255,255,255,0.6); margin-bottom: 20px; font-size: 0.95rem; }
.post-cta .hero-btn-primary { font-size: 0.9rem; padding: 11px 24px; }

/* Share buttons */
.share-bar { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 32px; padding-top: 24px; border-top: 1px solid var(--border); }
.share-label { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); }
.share-btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 16px; border-radius: 999px;
  font-size: 0.8rem; font-weight: 600; border: 1.5px solid var(--border);
  color: var(--text-body); background: transparent; cursor: pointer; text-decoration: none;
  transition: all var(--t-base);
}
.share-btn:hover { border-color: var(--color-primary); color: var(--color-primary); background: rgba(99,102,241,0.06); text-decoration: none; }

/* Comments */
.comments-section { margin-top: 48px; }
.comments-section h2 { font-size: 1.3rem; font-weight: 800; color: var(--text-heading); margin-bottom: 24px; }
.comment-thread { display: flex; flex-direction: column; gap: 16px; }
.comment {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 18px 20px;
}
.comment.reply {
  margin-left: 32px; border-left: 3px solid rgba(99,102,241,0.25);
  background: rgba(99,102,241,0.02);
}
.comment-header { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; flex-wrap: wrap; }
.comment-avatar {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 0.85rem; flex-shrink: 0;
}
.comment-avatar.ai { background: linear-gradient(135deg, #06b6d4, #3b82f6); }
.comment-name { font-size: 0.88rem; font-weight: 700; color: var(--text-heading); }
.comment-ai-badge { font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; background: rgba(6,182,212,0.1); color: #0891b2; padding: 2px 7px; border-radius: 999px; }
.comment-time { font-size: 0.75rem; color: var(--text-muted); margin-left: auto; }
.comment-body { font-size: 0.88rem; color: var(--text-body); line-height: 1.65; }
.comment-actions { display: flex; gap: 12px; align-items: center; margin-top: 10px; }
.comment-like-btn { background: none; border: none; cursor: pointer; font-size: 0.78rem; color: var(--text-muted); display: flex; align-items: center; gap: 4px; padding: 4px 8px; border-radius: 6px; transition: all var(--t-base); }
.comment-like-btn:hover { background: rgba(99,102,241,0.06); color: var(--color-primary); }
.comment-reply-btn { background: none; border: none; cursor: pointer; font-size: 0.78rem; color: var(--text-muted); padding: 4px 8px; border-radius: 6px; transition: all var(--t-base); font-weight: 500; }
.comment-reply-btn:hover { color: var(--color-primary); background: rgba(99,102,241,0.06); }

/* Comment form */
.comment-form-wrap {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; margin-top: 28px;
}
.comment-form-wrap h3 { font-size: 1rem; font-weight: 700; color: var(--text-heading); margin-bottom: 18px; }
.comment-form { display: flex; flex-direction: column; gap: 14px; }
.cf-row { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 12px; }
.cf-input, .cf-textarea {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid rgba(0,0,0,0.1); border-radius: var(--radius-sm);
  font-family: var(--font-body); font-size: 0.88rem; color: var(--text-heading);
  background: #fafafa; outline: none;
  transition: border-color var(--t-base), box-shadow var(--t-base);
}
.cf-input:focus, .cf-textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99,102,241,0.1);
  background: #fff;
}
.cf-textarea { resize: vertical; min-height: 100px; }
.cf-submit {
  align-self: flex-start;
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 26px; border-radius: 999px;
  background: var(--grad-primary); color: #fff;
  font-size: 0.9rem; font-weight: 700; border: none; cursor: pointer;
  box-shadow: 0 4px 16px rgba(99,102,241,0.4);
  transition: filter var(--t-base), transform var(--t-base);
}
.cf-submit:hover { filter: brightness(1.08); transform: translateY(-1px); }
.cf-char-count { font-size: 0.75rem; color: var(--text-muted); text-align: right; }

/* Featured image below hero */
.post-featured-img { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 40px; }
.post-featured-img img { width: 100%; max-height: 480px; object-fit: cover; }

/* Comment form helpers */
.cf-label { display: block; font-size: 0.82rem; font-weight: 600; color: var(--text-heading); margin-bottom: 6px; }
.cf-required { color: #ef4444; }
.cf-optional { font-weight: 400; color: var(--text-muted); font-size: 0.78rem; }

/* Comments heading badge */
.comments-count-badge {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 24px; height: 24px; padding: 0 7px;
  background: rgba(99,102,241,0.12); color: var(--color-primary);
  border-radius: 999px; font-size: 0.75rem; font-weight: 700; margin-left: 8px;
}

/* Related posts */
.related-section { margin-top: 60px; padding-top: 40px; border-top: 1px solid var(--border); }
.related-section h2 { font-size: 1.2rem; font-weight: 800; color: var(--text-heading); margin-bottom: 20px; }
.related-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.related-card {
  display: block; padding: 18px 20px;
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius-md);
  transition: border-color var(--t-base), box-shadow var(--t-base); color: inherit;
}
.related-card:hover { border-color: var(--border-hover); box-shadow: 0 4px 20px rgba(99,102,241,0.1); text-decoration: none; }
.related-card h3 { font-size: 0.9rem; font-weight: 700; color: var(--text-heading); line-height: 1.4; margin-bottom: 8px; }
.related-card p { font-size: 0.8rem; color: var(--text-muted); line-height: 1.5; }
.related-card-meta { display: inline-block; margin-top: 10px; font-size: 0.72rem; color: var(--text-muted); font-weight: 500; }

/* ─────────────────────────────────────────────
   POST HERO IMPROVEMENTS
───────────────────────────────────────────── */
.post-hero .post-hero-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(99,102,241,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99,102,241,0.06) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 40%, transparent 100%);
}
.post-breadcrumbs {
  display: flex; align-items: center; gap: 6px; flex-wrap: wrap;
  font-size: 0.75rem; color: rgba(255,255,255,0.4);
  margin-bottom: 16px; justify-content: center;
}
.post-breadcrumbs a { color: rgba(255,255,255,0.5); text-decoration: none; transition: color var(--t-base); }
.post-breadcrumbs a:hover { color: rgba(255,255,255,0.85); }
.breadcrumb-sep { color: rgba(255,255,255,0.25); }
.breadcrumb-current { color: rgba(255,255,255,0.6); }
.post-hero-meta-link {
  color: rgba(255,255,255,0.5) !important; text-decoration: none;
  transition: color var(--t-base);
}
.post-hero-meta-link:hover { color: rgba(255,255,255,0.85) !important; text-decoration: none; }

/* ─────────────────────────────────────────────
   FEATURED IMAGE PLACEHOLDER
───────────────────────────────────────────── */
.post-featured-placeholder {
  border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 40px;
  height: 340px; display: flex; align-items: center; justify-content: center;
  position: relative;
}
.post-featured-placeholder::before {
  content: ''; position: absolute; inset: 0;
  background: rgba(0,0,0,0.18); pointer-events: none;
}
.post-featured-placeholder-inner {
  position: relative; z-index: 2; text-align: center; padding: 24px;
}
.post-featured-placeholder-cat {
  display: inline-block; font-size: 0.7rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: rgba(255,255,255,0.75); background: rgba(255,255,255,0.15);
  padding: 4px 12px; border-radius: 999px; margin-bottom: 14px;
}
.post-featured-placeholder-inner h2 {
  font-size: clamp(1.2rem, 3vw, 1.9rem); font-weight: 800;
  color: #fff; line-height: 1.25; letter-spacing: -0.02em; max-width: 560px;
}

/* ─────────────────────────────────────────────
   POST TAGS
───────────────────────────────────────────── */
.post-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.post-tag {
  font-size: 0.72rem; font-weight: 600; padding: 4px 12px;
  border-radius: 999px; background: rgba(99,102,241,0.08);
  color: var(--color-primary); border: 1px solid rgba(99,102,241,0.15);
  transition: background var(--t-base); cursor: default;
}
.post-tag:hover { background: rgba(99,102,241,0.14); }

/* ─────────────────────────────────────────────
   POST BODY — CODE / PRE / TABLE
───────────────────────────────────────────── */
.post-body code {
  font-family: 'Fira Code', Consolas, monospace; font-size: 0.85em;
  background: rgba(99,102,241,0.08); color: #6366f1;
  padding: 2px 6px; border-radius: 4px;
}
.post-body pre {
  background: #0f0f1a; border-radius: var(--radius-sm);
  padding: 20px 24px; margin: 1.5em 0; overflow-x: auto;
}
.post-body pre code {
  background: transparent; color: #c4b5fd; padding: 0;
  font-size: 0.875rem; line-height: 1.7;
}
.post-body table {
  width: 100%; border-collapse: collapse; margin: 1.5em 0;
  font-size: 0.88rem; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--border);
}
.post-body th {
  background: rgba(99,102,241,0.08); color: var(--text-heading);
  font-weight: 700; text-align: left; padding: 10px 14px;
  border-bottom: 2px solid rgba(99,102,241,0.15);
}
.post-body td { padding: 9px 14px; border-bottom: 1px solid var(--border); }
.post-body tr:last-child td { border-bottom: none; }
.post-body tr:nth-child(even) td { background: rgba(0,0,0,0.02); }
.post-body img { border-radius: var(--radius-sm); margin: 1em 0; }

/* ─────────────────────────────────────────────
   RELATED POSTS — WITH THUMBNAIL
───────────────────────────────────────────── */
.related-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.related-card-img { height: 140px; overflow: hidden; flex-shrink: 0; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--t-slow); }
.related-card:hover .related-card-img img { transform: scale(1.05); }
.related-card-placeholder {
  display: flex; align-items: center; justify-content: center;
}
.related-card-placeholder span {
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em;
  color: rgba(255,255,255,0.8); background: rgba(255,255,255,0.15);
  padding: 4px 12px; border-radius: 999px;
}
.related-card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 6px; flex: 1; }
.related-card-cat {
  display: inline-block; font-size: 0.65rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--color-primary); background: rgba(99,102,241,0.08);
  padding: 2px 8px; border-radius: 999px;
}
.related-card-body h3 { font-size: 0.88rem; margin-bottom: 2px; }
.related-card-body p  { font-size: 0.78rem; }

/* ─────────────────────────────────────────────
   COMMENTS IMPROVEMENTS
───────────────────────────────────────────── */
.comments-header {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 8px; margin-bottom: 20px;
}
.comments-header h2 { margin-bottom: 0; }
.comments-jump-link {
  font-size: 0.8rem; font-weight: 600; color: var(--color-primary);
  text-decoration: none; padding: 6px 14px; border-radius: 999px;
  border: 1.5px solid rgba(99,102,241,0.2); transition: all var(--t-base);
}
.comments-jump-link:hover {
  background: rgba(99,102,241,0.06); border-color: var(--color-primary); text-decoration: none;
}
.comments-empty { text-align: center; padding: 48px 20px; }
.comments-empty-icon { font-size: 2.5rem; margin-bottom: 12px; }
.comments-empty p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 16px; }
.comments-empty-cta {
  display: inline-block; font-size: 0.85rem; font-weight: 600;
  color: var(--color-primary); text-decoration: none;
  padding: 8px 20px; border-radius: 999px;
  border: 1.5px solid rgba(99,102,241,0.25); transition: all var(--t-base);
}
.comments-empty-cta:hover { background: rgba(99,102,241,0.06); text-decoration: none; }

/* comment-meta wrapper */
.comment-meta { display: flex; flex-direction: column; gap: 2px; flex: 1; min-width: 0; }
.comment-meta .comment-time { margin-left: 0; }

/* Nested replies */
.comment-replies {
  margin-top: 14px; display: flex; flex-direction: column; gap: 10px;
  padding-top: 14px; border-top: 1px dashed rgba(99,102,241,0.12);
}
.comment-replies .comment.reply { margin-left: 0; }

/* Reply inline form */
.reply-form-inner {
  display: flex; flex-direction: column; gap: 10px; margin-top: 12px;
  padding: 16px; background: rgba(99,102,241,0.03);
  border-radius: var(--radius-sm); border: 1px dashed rgba(99,102,241,0.2);
  animation: fadeIn 0.25s ease;
}

/* Comment form footer row */
.cf-footer {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
}

/* ─────────────────────────────────────────────
   SIDEBAR IMPROVEMENTS
───────────────────────────────────────────── */
.sidebar-author { text-align: center; padding: 24px 20px; }
.sidebar-author-avatar {
  width: 52px; height: 52px; border-radius: 50%; margin: 0 auto 12px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff; font-size: 1rem;
}
.sidebar-author-name { font-size: 0.92rem; font-weight: 700; color: var(--text-heading); margin-bottom: 4px; }
.sidebar-author-role { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 14px; }
.sidebar-author-cta {
  display: inline-block; padding: 8px 18px; border-radius: 999px;
  background: var(--grad-primary); color: #fff; font-size: 0.8rem; font-weight: 600;
  text-decoration: none; box-shadow: 0 4px 14px rgba(99,102,241,0.35);
  transition: filter var(--t-base), transform var(--t-base);
}
.sidebar-author-cta:hover { filter: brightness(1.08); transform: translateY(-1px); text-decoration: none; color: #fff; }
.sidebar-share-btns { display: grid; grid-template-columns: repeat(4,1fr); gap: 8px; margin-top: 4px; }
.sidebar-share-btn {
  display: flex; align-items: center; justify-content: center;
  height: 38px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--border); background: transparent;
  cursor: pointer; font-size: 0.85rem; font-weight: 600; color: var(--text-muted);
  text-decoration: none; transition: all var(--t-base);
}
.sidebar-share-btn:hover {
  border-color: var(--color-primary); color: var(--color-primary);
  background: rgba(99,102,241,0.06); text-decoration: none;
}

/* ─────────────────────────────────────────────
   BACK TO TOP
───────────────────────────────────────────── */
.back-to-top {
  position: fixed; bottom: 28px; right: 28px; z-index: 90;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--grad-primary); color: #fff; border: none; cursor: pointer;
  font-size: 1.1rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(99,102,241,0.4);
  opacity: 0; transform: translateY(12px);
  transition: opacity var(--t-base), transform var(--t-base);
  pointer-events: none;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-to-top:hover { filter: brightness(1.1); transform: translateY(-2px); }

/* ─────────────────────────────────────────────
   FOOTER IMPROVEMENTS
───────────────────────────────────────────── */
.blog-footer-inner {
  max-width: var(--max-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 20px;
}
.blog-footer-logo { font-size: 1rem; font-weight: 800; color: rgba(255,255,255,0.7); margin-bottom: 6px; }
.blog-footer-tagline { font-size: 0.78rem; color: rgba(255,255,255,0.25); }
.blog-footer-links { display: flex; gap: 20px; flex-wrap: wrap; }
.blog-footer-links a {
  font-size: 0.82rem; color: rgba(255,255,255,0.35);
  text-decoration: none; transition: color var(--t-base);
}
.blog-footer-links a:hover { color: rgba(255,255,255,0.7); text-decoration: none; }
.blog-footer-copy { font-size: 0.78rem; color: rgba(255,255,255,0.25); }

/* ─────────────────────────────────────────────
   ANIMATIONS
───────────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─────────────────────────────────────────────
   RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .posts-grid { grid-template-columns: repeat(2,1fr); }
  .posts-grid .post-card:first-child { grid-column: span 2; }
  .post-wrapper { grid-template-columns: 1fr; }
  .post-sidebar { position: static; }
  .related-grid { grid-template-columns: repeat(2,1fr); }
}
@media (max-width: 680px) {
  .posts-grid { grid-template-columns: 1fr; }
  .posts-grid .post-card:first-child { grid-column: 1; grid-template-columns: 1fr; }
  .posts-grid .post-card:first-child .post-card-image { height: 200px; }
  .blog-hero { padding: 110px 20px 70px; min-height: 520px; }
  .cf-row { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 20px; }
  .post-featured-placeholder { height: 220px; }
  .related-card-img { height: 110px; }
  .back-to-top { bottom: 16px; right: 16px; width: 38px; height: 38px; font-size: 1rem; }
  .blog-footer-inner { flex-direction: column; text-align: center; gap: 16px; }
  .comments-header { flex-direction: column; align-items: flex-start; }
}