/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #01060f;
  --bg-dark: #000407;
  --bg-card: #020c18;
  --bg-card-hover: #031525;
  --border: #0a2040;
  --accent: #00c8ff;
  --accent2: #00ff9f;
  --accent-glow: 0 0 12px rgba(0, 200, 255, 0.5);
  --accent-glow2: 0 0 12px rgba(0, 255, 159, 0.4);
  --accent-dim: rgba(0, 200, 255, 0.12);
  --text: #c0eeff;
  --text-muted: #2a5a7a;
  --text-dim: #6a9ab0;
  --muted: #2a5a7a;
  /* --font and --mono inherited from /style.css to keep typography uniform site-wide */
  --font-body: 'Inter', system-ui, sans-serif;
  --radius: 8px;
  --transition: 0.2s ease;
  /* blog-specific text variables referenced by sidebar inline styles */
  --text-body: #c0eeff;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }

/* ===== MATRIX CANVAS ===== */
#matrix-canvas {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  opacity: 0.07;
  pointer-events: none;
}

/* Deep ocean overlay gradient */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgba(0, 50, 100, 0.4) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 0% 100%, rgba(0, 30, 60, 0.5) 0%, transparent 60%),
    radial-gradient(ellipse 50% 50% at 100% 50%, rgba(0, 80, 120, 0.2) 0%, transparent 60%);
}

/* Scan lines for CRT/underwater feel */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.03) 2px,
    rgba(0, 0, 0, 0.03) 4px
  );
}

/* ===== BLOG APP WRAPPER ===== */
#blog-app {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 2rem 4rem;
}

/* ===== LISTING HEADER ===== */
.listing-header {
  position: relative;
  z-index: 1;
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2rem;
}

.page-title {
  font-family: var(--mono);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--accent);
  text-shadow: var(--accent-glow);
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.page-sub {
  color: var(--text-dim);
  font-size: 0.95rem;
  margin-bottom: 1.5rem;
}

/* ===== CATEGORY PILLS ===== */
.cat-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.cat-pill {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.85rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--text-muted);
  background: transparent;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.cat-pill:hover {
  border-color: rgba(0, 200, 255, 0.4);
  color: var(--accent);
  background: var(--accent-dim);
}

.cat-pill.active {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
  text-shadow: var(--accent-glow);
}

/* ===== LISTING LAYOUT — 2-column on desktop ===== */
.listing-layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 3rem;
  align-items: start;
}

.listing-main {
  min-width: 0;
}

/* ===== POST CARDS ===== */
.post-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.5rem;
  align-items: start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.post-card:hover {
  border-color: rgba(0, 200, 255, 0.3);
  box-shadow: 0 0 25px rgba(0, 200, 255, 0.05);
}

.post-card-cover {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: calc(var(--radius) - 2px);
  display: block;
}

.post-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-width: 0;
}

.post-card-cat {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent2);
  text-shadow: var(--accent-glow2);
  transition: opacity var(--transition);
}

.post-card-cat:hover { opacity: 0.8; }

.post-card-title {
  display: block;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
  transition: color var(--transition);
}

.post-card-title:hover { color: var(--accent); }

.post-card-excerpt {
  color: var(--text-dim);
  font-size: 0.875rem;
  line-height: 1.65;
}

.post-card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: sticky;
  top: 72px;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  z-index: 1;
}

.sidebar-widget {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

.sidebar-widget-title {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-shadow: var(--accent-glow);
  margin-bottom: 0.85rem;
  text-transform: uppercase;
}

.sidebar-post-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.sidebar-post-list li a {
  color: var(--text-dim);
  font-size: 0.82rem;
  line-height: 1.4;
  display: block;
  transition: color var(--transition);
}

.sidebar-post-list li a:hover { color: var(--accent); }

.sidebar-post-list .meta {
  font-size: 0.68rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

.cat-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.cat-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--border);
}

.cat-list li:last-child { border-bottom: none; }

.cat-list li a {
  color: var(--text-dim);
  font-size: 0.82rem;
  transition: color var(--transition);
}

.cat-list li a:hover { color: var(--accent); }

.cat-list .count {
  font-family: var(--mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: rgba(0, 200, 255, 0.08);
  padding: 0.1rem 0.4rem;
  border-radius: 2px;
}

/* AUP sidebar CTA */
.aup-cta {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--accent);
  border: 1px solid rgba(0, 200, 255, 0.35);
  padding: 0.45rem 0.85rem;
  border-radius: 3px;
  transition: background var(--transition), box-shadow var(--transition);
  width: 100%;
  text-align: center;
}

.aup-cta:hover {
  background: var(--accent-dim);
  box-shadow: 0 0 12px rgba(0, 200, 255, 0.15);
}

/* ===== PAGINATION ===== */
.pagination {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  flex-wrap: wrap;
  padding: 1.5rem 0 0.5rem;
  z-index: 1;
  position: relative;
}

.pagination a,
.pagination .current,
.pagination .disabled {
  font-family: var(--mono);
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 3px;
  letter-spacing: 0.05em;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.pagination a {
  color: var(--text-dim);
}

.pagination a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.pagination .current {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.pagination .disabled {
  color: var(--text-muted);
  opacity: 0.4;
  cursor: default;
}

/* ===== POST WRAPPER (post page grid) ===== */
.post-wrapper {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
  padding-top: 1.5rem;
}

/* ===== TABLE OF CONTENTS (left rail) ===== */
.post-toc {
  position: sticky;
  top: 72px;
}

.post-toc-title {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.85rem;
  text-shadow: var(--accent-glow);
}

.post-toc .toc ul {
  list-style: none;
  padding-left: 0;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.post-toc .toc ul ul {
  padding-left: 0.85rem;
  margin-top: 0;
}

.post-toc .toc li {
  border-left: 1px solid var(--border);
  padding-left: 0.75rem;
  margin-bottom: 0;
}

.post-toc .toc a {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  padding: 0.3rem 0;
  line-height: 1.4;
  transition: color var(--transition), border-color var(--transition);
}

.post-toc .toc a:hover { color: var(--accent); }

/* ===== POST MAIN ===== */
.post-main {
  min-width: 0;
}

.post-hero-img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  display: block;
  margin-bottom: 1.5rem;
  border: 1px solid var(--border);
}

.post-cat-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent2);
  text-shadow: var(--accent-glow2);
  margin-bottom: 0.75rem;
  transition: opacity var(--transition);
}

.post-cat-badge:hover { opacity: 0.8; }

.post-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 0.85rem;
}

.post-meta {
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

/* ===== POST BODY TYPOGRAPHY ===== */
.post-body {
  color: var(--text-dim);
  font-size: 1rem;
  line-height: 1.8;
}

.post-body p {
  margin-bottom: 1.25rem;
}

.post-body h2 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
  margin-top: 2.5rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--border);
}

.post-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 1.75rem;
  margin-bottom: 0.65rem;
}

.post-body h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent2);
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

.post-body h5,
.post-body h6 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  margin-top: 1.25rem;
  margin-bottom: 0.5rem;
}

.post-body a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--transition);
}

.post-body a:hover { opacity: 0.8; }

.post-body strong { color: var(--text); font-weight: 600; }
.post-body em { color: var(--text-dim); font-style: italic; }

.post-body ul,
.post-body ol {
  padding-left: 1.5rem;
  margin-bottom: 1.25rem;
}

.post-body ul { list-style: disc; }
.post-body ol { list-style: decimal; }

.post-body li {
  margin-bottom: 0.4rem;
  line-height: 1.7;
}

.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.75rem 1.25rem;
  margin: 1.5rem 0;
  background: rgba(0, 200, 255, 0.04);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
  font-style: italic;
}

.post-body blockquote p { margin-bottom: 0; }

/* ===== CODE — CRITICAL for cost table column alignment ===== */
.post-body pre {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  overflow-x: auto;
  /* Preserve column alignment */
  white-space: pre;
  tab-size: 4;
}

.post-body pre code {
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--text);
  background: none;
  border: none;
  padding: 0;
  /* Monospace, white-space inherited from pre */
  white-space: pre;
  word-break: normal;
  overflow-wrap: normal;
}

.post-body code {
  font-family: var(--mono);
  font-size: 0.85em;
  color: var(--accent2);
  background: rgba(0, 255, 159, 0.07);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  border: 1px solid rgba(0, 255, 159, 0.12);
}

/* Pygments / codehilite syntax highlight classes */
.post-body .highlight {
  background: rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin: 1.5rem 0;
  overflow-x: auto;
}

.post-body .highlight pre {
  background: none;
  border: none;
  border-radius: 0;
  margin: 0;
  padding: 1.25rem 1.5rem;
}

/* Pygments token colors */
.post-body .highlight .hll { background: rgba(0,200,255,0.07); }
.post-body .highlight .c  { color: #4a7a9b; font-style: italic; }   /* Comment */
.post-body .highlight .k  { color: #00c8ff; font-weight: 600; }     /* Keyword */
.post-body .highlight .o  { color: #6a9ab0; }                        /* Operator */
.post-body .highlight .n  { color: #c0eeff; }                        /* Name */
.post-body .highlight .s  { color: #00ff9f; }                        /* String */
.post-body .highlight .m  { color: #00ff9f; }                        /* Number */
.post-body .highlight .p  { color: #6a9ab0; }                        /* Punctuation */
.post-body .highlight .err { color: #ff4466; }                       /* Error */
.post-body .highlight .cm { color: #4a7a9b; font-style: italic; }   /* Comment.Multiline */
.post-body .highlight .cp { color: #00c8ff; }                        /* Comment.Preproc */
.post-body .highlight .cs { color: #4a7a9b; font-weight: 600; }     /* Comment.Special */
.post-body .highlight .ge { font-style: italic; }                    /* Generic.Emph */
.post-body .highlight .gr { color: #ff4466; }                        /* Generic.Error */
.post-body .highlight .gh { color: var(--accent); font-weight: 700; } /* Generic.Heading */
.post-body .highlight .gi { color: #00ff9f; }                        /* Generic.Inserted */
.post-body .highlight .gd { color: #ff4466; }                        /* Generic.Deleted */
.post-body .highlight .go { color: #6a9ab0; }                        /* Generic.Output */
.post-body .highlight .gs { font-weight: 700; }                      /* Generic.Strong */
.post-body .highlight .gu { color: var(--accent2); }                 /* Generic.Subheading */
.post-body .highlight .kc { color: #00c8ff; }                        /* Keyword.Constant */
.post-body .highlight .kd { color: #00c8ff; }                        /* Keyword.Declaration */
.post-body .highlight .kn { color: #00c8ff; }                        /* Keyword.Namespace */
.post-body .highlight .kp { color: #00c8ff; }                        /* Keyword.Pseudo */
.post-body .highlight .kr { color: #00c8ff; }                        /* Keyword.Reserved */
.post-body .highlight .kt { color: #00c8ff; }                        /* Keyword.Type */
.post-body .highlight .nb { color: #00c8ff; }                        /* Name.Builtin */
.post-body .highlight .nc { color: var(--accent2); }                 /* Name.Class */
.post-body .highlight .nd { color: var(--accent); }                  /* Name.Decorator */
.post-body .highlight .ni { color: var(--text); }                    /* Name.Entity */
.post-body .highlight .nf { color: var(--accent); }                  /* Name.Function */
.post-body .highlight .nn { color: var(--text); }                    /* Name.Namespace */
.post-body .highlight .nt { color: var(--accent); }                  /* Name.Tag */
.post-body .highlight .nv { color: var(--text); }                    /* Name.Variable */
.post-body .highlight .sa { color: #00ff9f; }                        /* String.Affix */
.post-body .highlight .sb { color: #00ff9f; }                        /* String.Backtick */
.post-body .highlight .sc { color: #00ff9f; }                        /* String.Char */
.post-body .highlight .sd { color: #4a7a9b; font-style: italic; }   /* String.Doc */
.post-body .highlight .s2 { color: #00ff9f; }                        /* String.Double */
.post-body .highlight .se { color: #00ff9f; }                        /* String.Escape */
.post-body .highlight .sh { color: #00ff9f; }                        /* String.Heredoc */
.post-body .highlight .si { color: #00ff9f; }                        /* String.Interpol */
.post-body .highlight .sx { color: #00ff9f; }                        /* String.Other */
.post-body .highlight .sr { color: #00ff9f; }                        /* String.Regex */
.post-body .highlight .s1 { color: #00ff9f; }                        /* String.Single */
.post-body .highlight .ss { color: #00ff9f; }                        /* String.Symbol */

/* ===== TABLES in post body ===== */
.post-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.875rem;
}

.post-body thead {
  background: rgba(0, 200, 255, 0.08);
  border-bottom: 2px solid var(--accent);
}

.post-body th {
  text-align: left;
  padding: 0.65rem 1rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
}

.post-body td {
  padding: 0.6rem 1rem;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border);
}

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

.post-body tr:hover td {
  background: rgba(0, 200, 255, 0.03);
}

/* ===== POST IMAGES ===== */
.post-body img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  margin: 1.5rem auto;
}

/* Heading anchor links (codehilite adds ¶) */
.post-body .headerlink {
  color: var(--text-muted);
  font-size: 0.75em;
  margin-left: 0.4rem;
  text-decoration: none;
  opacity: 0;
  transition: opacity var(--transition);
}

.post-body h2:hover .headerlink,
.post-body h3:hover .headerlink,
.post-body h4:hover .headerlink { opacity: 1; }

/* ===== POST TAGS ===== */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.post-tag {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: rgba(0, 200, 255, 0.05);
  border: 1px solid var(--border);
  padding: 0.25rem 0.65rem;
  border-radius: 3px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

a.post-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ===== AUTHOR BIO ===== */
.author-bio {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-top: 2.5rem;
}

.author-bio-glyph {
  font-family: var(--mono);
  font-size: 2rem;
  color: var(--accent);
  text-shadow: var(--accent-glow);
  min-width: 2.5rem;
  text-align: center;
  flex-shrink: 0;
}

.author-bio-text h3 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.author-bio-text p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
  margin-bottom: 0.65rem;
}

.author-bio-text a {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  transition: text-shadow var(--transition);
}

.author-bio-text a:hover { text-shadow: var(--accent-glow); }

/* ===== CTA BLOCK ===== */
.ctas-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
}

.cta-box {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cta-primary {
  border-color: rgba(0, 200, 255, 0.25);
  background: rgba(0, 200, 255, 0.04);
}

.cta-primary:hover {
  border-color: rgba(0, 200, 255, 0.5);
  box-shadow: 0 0 20px rgba(0, 200, 255, 0.07);
}

.cta-secondary {
  border-color: rgba(0, 255, 159, 0.2);
  background: rgba(0, 255, 159, 0.03);
}

.cta-secondary:hover {
  border-color: rgba(0, 255, 159, 0.4);
  box-shadow: 0 0 20px rgba(0, 255, 159, 0.06);
}

.cta-box p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.6;
}

.cta-box a {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.04em;
  align-self: flex-start;
  transition: text-shadow var(--transition);
}

.cta-box a:hover { text-shadow: var(--accent-glow); }
.cta-secondary .cta-box a { color: var(--accent2); }
.cta-secondary .cta-box a:hover { text-shadow: var(--accent-glow2); }

/* ===== SHARE BUTTONS ===== */
.share-buttons {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  margin-top: 1.5rem;
  padding: 1rem 0;
  border-top: 1px solid var(--border);
}

.share-label {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.share-btn {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  border: 1px solid var(--border);
  padding: 0.3rem 0.75rem;
  border-radius: 3px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.share-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

/* ===== RELATED POSTS ===== */
.related-posts {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}

.related-posts-title {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-shadow: var(--accent-glow);
  margin-bottom: 1.25rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.related-card:hover {
  border-color: rgba(0, 200, 255, 0.3);
  box-shadow: 0 0 15px rgba(0, 200, 255, 0.05);
}

.related-card-cat {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent2);
}

.related-card-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.35;
}

.related-card-meta {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-top: auto;
}

/* ===== BLOG FOOTER ===== */
.blog-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  margin-top: 4rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-bottom: 1rem;
}

.footer-links a {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--accent); }

.blog-footer p {
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.blog-footer p a {
  color: var(--accent);
  transition: text-shadow var(--transition);
}

.blog-footer p a:hover { text-shadow: var(--accent-glow); }

/* ===== RESPONSIVE ===== */

/* Tablet: sidebar under main */
@media (max-width: 900px) {
  .listing-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .sidebar {
    position: static;
  }

  .post-wrapper {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .post-toc {
    position: static;
    /* On mobile the TOC becomes a collapsible—just show it at the top */
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    background: var(--bg-card);
  }

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

  .ctas-block {
    grid-template-columns: 1fr;
  }
}

/* Mobile */
@media (max-width: 600px) {
  #blog-app {
    padding: 72px 1rem 2.5rem;
  }

  .post-card {
    grid-template-columns: 1fr;
  }

  .post-card-cover {
    aspect-ratio: 16 / 7;
  }

  .post-title {
    font-size: 1.4rem;
  }

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

  .share-buttons {
    gap: 0.5rem;
  }

  .author-bio {
    flex-direction: column;
    gap: 0.75rem;
  }

  .author-bio-glyph {
    font-size: 1.5rem;
  }
}

/* Minimal touch target size — 44px minimum for interactive elements */
@media (max-width: 768px) {
  .cat-pill,
  .share-btn,
  .aup-cta {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .pagination a,
  .pagination .current,
  .pagination .disabled {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
    padding: 0.35rem 0.85rem;
  }
}