*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --ink: #e8e0d5;
  --ink-muted: #8a7f72;
  --ink-dim: #5a5249;
  --paper: #0d0b09;
  --paper-raised: #131008;
  --paper-card: #1a1510;
  --gold: #c9a84c;
  --gold-dim: #7a6230;
  --rust: #c4622d;
  --teal: #3d9a8a;
  --serif: 'Cormorant Garamond', Georgia, serif;
  --body: 'Newsreader', Georgia, serif;
  --mono: 'JetBrains Mono', monospace;
  --col: 680px;
  --measure: 640px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 18px;
  font-weight: 300;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background: rgba(201, 168, 76, 0.25);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

/* ── Navigation ── */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(13, 11, 9, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(201, 168, 76, 0.12);
}

.nav-logo {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--gold);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  transition: color 0.2s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--gold);
}

.nav-links a.active::after,
.nav-links a:hover::after {
  width: 100%;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink-muted);
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(4.5px, 4.5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(4.5px, -4.5px); }

/* ── Hero ── */
.hero {
  min-height: 92vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 8rem 2.5rem 4rem;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201,168,76,0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201,168,76,0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,0.8) 40%, rgba(0,0,0,0.2) 100%);
  -webkit-mask-image: linear-gradient(to bottom, transparent, rgba(0,0,0,0.8) 40%, rgba(0,0,0,0.2) 100%);
}

.series-ribbon {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
}

.series-ribbon::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--gold-dim), transparent);
  max-width: 200px;
}

.series-ribbon .part-num {
  color: var(--ink-muted);
  font-weight: 500;
}

.hero h1 {
  font-family: var(--serif);
  font-size: clamp(2.8rem, 7vw, 6.5rem);
  font-weight: 300;
  line-height: 1.0;
  letter-spacing: -0.02em;
  max-width: 16ch;
  margin-bottom: 2.5rem;
  position: relative;
}

.hero h1 em {
  font-style: italic;
  color: var(--gold);
}

.hero-sub {
  max-width: 58ch;
  font-size: 1.15rem;
  color: var(--ink-muted);
  line-height: 1.7;
  margin-bottom: 3.5rem;
  position: relative;
}

.hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1.5rem;
  border-top: 1px solid rgba(201,168,76,0.2);
  padding-top: 1.5rem;
  position: relative;
}

.hero-meta .byline {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--ink-dim);
  margin: 0;
}

.hero-meta .byline span { color: var(--ink-muted); }

.tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.28rem 0.75rem;
  border: 1px solid var(--gold-dim);
  color: var(--gold);
  border-radius: 2px;
}

/* Hero entrance animations */
.hero h1, .hero-sub, .hero-meta, .series-ribbon {
  animation: rise 0.9s cubic-bezier(0.16,1,0.3,1) backwards;
}
.series-ribbon { animation-delay: 0.05s; }
.hero h1 { animation-delay: 0.15s; }
.hero-sub { animation-delay: 0.35s; }
.hero-meta { animation-delay: 0.55s; }

@keyframes rise {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: none; }
}

/* ── Article ── */
.article {
  max-width: var(--col);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: 5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.section.visible {
  opacity: 1;
  transform: none;
}

.section-number {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--gold);
  margin-bottom: 1.25rem;
  display: block;
}

/* ── Typography ── */
h2 {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 300;
  line-height: 1.1;
  letter-spacing: -0.01em;
  margin-bottom: 2rem;
}

h3 {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.9rem;
  color: var(--ink);
}

p {
  color: var(--ink-muted);
  margin-bottom: 1.5rem;
}

p strong {
  color: var(--ink);
  font-weight: 400;
}

p em { color: var(--ink); font-style: italic; }

a.inline-link {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-dim);
  transition: color 0.2s, border-color 0.2s;
}

a.inline-link:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ── Lead Paragraph ── */
.lead {
  font-size: 1.22rem;
  color: var(--ink);
  font-weight: 300;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.lead strong {
  color: var(--gold);
  font-weight: 400;
}

/* ── Pullquote ── */
.pullquote {
  margin: 3.5rem -1.5rem;
  padding: 2.5rem 2rem 2.5rem 2.5rem;
  border-left: 3px solid var(--gold);
  font-family: var(--serif);
  font-size: 1.6rem;
  font-weight: 300;
  font-style: italic;
  line-height: 1.35;
  color: var(--ink);
}

.pullquote cite {
  display: block;
  font-family: var(--mono);
  font-style: normal;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-top: 1rem;
}

/* ── Callout ── */
.callout {
  background: var(--paper-raised);
  border-left: 2px solid var(--gold-dim);
  padding: 1.75rem 2rem;
  margin: 2.5rem 0;
}

.callout-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.callout p:last-child { margin-bottom: 0; }

/* ── Stat Block ── */
.stat-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: rgba(255,255,255,0.06);
  margin: 3rem 0;
  border: 1px solid rgba(255,255,255,0.06);
}

.stat-cell {
  background: var(--paper-card);
  padding: 2rem 1.75rem;
}

.stat-source {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}

.stat-figure {
  font-family: var(--serif);
  font-size: 3rem;
  font-weight: 300;
  line-height: 1;
  color: var(--ink);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.stat-figure em {
  color: var(--gold);
  font-style: normal;
}

.stat-label {
  font-size: 0.92rem;
  color: var(--ink-muted);
  line-height: 1.5;
  margin: 0;
}

/* ── Taxonomy Grid ── */
.taxonomy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
  margin: 3rem 0;
  border: 1px solid rgba(255,255,255,0.06);
}

.tax-card {
  background: var(--paper-card);
  padding: 1.75rem;
}

.tax-label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.tax-card:nth-child(1) .tax-label { color: var(--teal); }
.tax-card:nth-child(2) .tax-label { color: var(--gold); }
.tax-card:nth-child(3) .tax-label { color: var(--rust); }

.tax-card h4 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.75rem;
}

.tax-card > p {
  font-size: 0.88rem;
  line-height: 1.6;
  margin: 0 0 1rem 0;
}

.tax-tradeoff {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  color: var(--ink-dim);
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 0.9rem;
  margin-top: 0.5rem;
  line-height: 1.6;
}

.tax-tradeoff span {
  color: var(--ink-muted);
  display: block;
  margin-top: 0.3rem;
}

.tax-meter {
  margin-top: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.tax-meter-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 0.62rem;
  color: var(--ink-dim);
}

.tax-meter-bar {
  flex: 1;
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  overflow: hidden;
}

.tax-meter-fill {
  height: 100%;
  border-radius: 2px;
  transition: width 1.2s cubic-bezier(0.16,1,0.3,1);
}

.tc1 .tax-meter-fill { background: var(--teal); }
.tc2 .tax-meter-fill { background: var(--gold); }
.tc3 .tax-meter-fill { background: var(--rust); }

/* ── Tease Block ── */
.tease {
  margin: 4rem 0 2rem;
  padding: 2.5rem 2rem;
  background: linear-gradient(135deg, rgba(201,168,76,0.06), rgba(196,98,45,0.04));
  border: 1px solid rgba(201,168,76,0.18);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}

.tease::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(201,168,76,0.05), transparent 50%),
    radial-gradient(circle at 90% 80%, rgba(196,98,45,0.05), transparent 50%);
  pointer-events: none;
}

.tease-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
  position: relative;
}

.tease h3 {
  font-family: var(--serif);
  font-size: 1.65rem;
  font-weight: 400;
  color: var(--ink);
  margin: 0 0 1rem 0;
  line-height: 1.25;
  position: relative;
}

.tease p {
  font-size: 1rem;
  margin-bottom: 1.25rem;
  position: relative;
}

.tease p:last-child { margin-bottom: 0; }

.tease-link {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--gold-dim);
  padding-bottom: 0.2rem;
  position: relative;
  transition: color 0.2s, border-color 0.2s;
}

.tease-link:hover { color: var(--ink); border-bottom-color: var(--ink); }

.tease-link::after {
  content: '\2192';
  transition: transform 0.2s;
}

.tease-link:hover::after { transform: translateX(4px); }

/* ── Series Navigation ── */
.series-nav {
  max-width: 880px;
  margin: 0 auto;
  padding: 5rem 2rem 3rem;
  border-top: 1px solid rgba(201,168,76,0.15);
}

.series-nav-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 2rem;
  text-align: center;
}

.series-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.06);
  list-style: none;
}

.series-list li {
  background: var(--paper-card);
  padding: 1.5rem 1.25rem;
  position: relative;
  transition: background 0.2s;
}

.series-list li a {
  text-decoration: none;
  color: inherit;
  display: block;
  height: 100%;
}

.series-list li.current { background: rgba(201,168,76,0.07); }
.series-list li.upcoming { opacity: 0.55; cursor: default; }

.series-num {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.series-num .status {
  font-size: 0.55rem;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
  border: 1px solid rgba(255,255,255,0.08);
  padding: 0.15rem 0.4rem;
  border-radius: 2px;
}

.series-list li.current .status {
  color: var(--gold);
  border-color: var(--gold-dim);
}

.series-list li:not(.current):not(.upcoming):hover { background: rgba(255,255,255,0.02); }
.series-list li:not(.current):not(.upcoming):hover .series-title { color: var(--gold); }

.series-title {
  font-family: var(--serif);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.4rem;
  line-height: 1.25;
  transition: color 0.2s;
}

.series-blurb {
  font-size: 0.8rem;
  color: var(--ink-muted);
  line-height: 1.5;
  margin: 0;
}

/* ── Post Content (Markdown output) ── */
.article a {
  color: var(--gold);
  border-bottom: 1px solid var(--gold-dim);
  transition: color 0.2s, border-color 0.2s;
}

.article a:hover {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

.article code {
  font-family: var(--mono);
  font-size: 0.85em;
  background: var(--paper-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
  padding: 0.15em 0.4em;
  color: var(--gold);
}

.article pre {
  background: var(--paper-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  padding: 1.25rem 1.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
  line-height: 1.5;
}

.article pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: 0.82rem;
  color: var(--ink-muted);
}

.article blockquote {
  border-left: 3px solid var(--gold);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--ink-muted);
  font-style: italic;
}

.article ul, .article ol {
  margin: 1rem 0 1.25rem 1.5rem;
  color: var(--ink-muted);
}

.article li { margin-bottom: 0.5rem; }

.article img {
  max-width: 100%;
  border-radius: 8px;
  margin: 1.5rem 0;
}

.article hr {
  border: none;
  border-top: 1px solid rgba(201,168,76,0.15);
  margin: 2.5rem 0;
}

/* ── Site Footer ── */
.site-footer {
  padding: 3rem 2rem 4rem;
  text-align: center;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.site-footer p {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ink-dim);
  margin: 0;
}

.site-footer p + p { margin-top: 0.5rem; }

/* ── Blog Listing ── */
.blog-listing {
  max-width: 780px;
  margin: 0 auto;
  padding: 8rem 2rem 4rem;
}

.listing-header {
  margin-bottom: 3rem;
}

.listing-header h1 {
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.listing-subtitle {
  margin-top: 1rem;
  font-size: 1.05rem;
  color: var(--ink-muted);
  max-width: 50ch;
}

/* ── Blog Cards ── */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.blog-card {
  background: var(--paper-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 10px;
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition: all 0.35s ease;
  display: flex;
  flex-direction: column;
}

.blog-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--teal));
}

.blog-card:hover {
  border-color: rgba(201, 168, 76, 0.15);
  box-shadow: 0 8px 40px rgba(0,0,0,0.35);
  transform: translateY(-3px);
}

.blog-card-date {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-dim);
  margin-bottom: 0.6rem;
}

.blog-card-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 0.6rem;
  transition: color 0.3s ease;
}

.blog-card:hover .blog-card-title { color: var(--gold); }

.blog-card-summary {
  font-size: 0.88rem;
  line-height: 1.65;
  color: var(--ink-muted);
  flex: 1;
  margin-bottom: 1rem;
}

.blog-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.blog-card-tag {
  font-family: var(--mono);
  font-size: 0.55rem;
  letter-spacing: 0.05em;
  padding: 0.15rem 0.5rem;
  border-radius: 3px;
  border: 1px solid rgba(201,168,76,0.2);
  color: var(--gold);
  background: rgba(201,168,76,0.04);
}

.blog-card-link {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: gap 0.3s ease;
  border-bottom: none;
}

.blog-card:hover .blog-card-link { gap: 0.7rem; }

/* ── BACK LINK ── */
.back-link {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: color 0.2s, border-color 0.2s;
}

.back-link:hover { color: var(--gold); border-bottom-color: var(--gold-dim); }

.back-link::before {
  content: '←';
  transition: transform 0.2s;
}

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

/* ── FRAMEWORK MATRIX ── */
.framework-matrix {
  margin: 3rem -0.5rem;
  overflow-x: auto;
}

.fm-table {
  width: 100%;
  min-width: 580px;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.fm-table th {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  padding: 0.75rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid rgba(201,168,76,0.25);
  font-weight: 500;
}

.fm-table td {
  padding: 0.95rem 0.85rem;
  color: var(--ink-muted);
  border-bottom: 1px solid rgba(255,255,255,0.05);
  vertical-align: middle;
  font-size: 0.85rem;
}

.fm-table tr:hover td { background: rgba(255,255,255,0.02); }

.fm-table .fw-name {
  font-family: var(--mono);
  font-size: 0.82rem;
  color: var(--ink);
  font-weight: 500;
  letter-spacing: 0.01em;
}

.fm-table .fw-approach {
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.fm-table .fw-stars {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-muted);
}

.dot-score {
  display: flex;
  gap: 3px;
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: rgba(255,255,255,0.12);
}

.dot.filled { background: var(--gold); }

/* ── CODE BLOCK ── */
.code-block {
  margin: 2.5rem 0;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 4px;
  overflow: hidden;
}

.code-block header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1rem;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.code-block header span {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--ink-dim);
}

.code-block header span.lang { color: var(--gold); }

.code-block pre {
  padding: 1.5rem;
  font-family: var(--mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--ink-muted);
  overflow-x: auto;
}

.kw { color: #c9a84c; }
.fn { color: #3d9a8a; }
.str { color: #c4622d; }
.cm { color: var(--ink-dim); font-style: italic; }

/* ── PROTOCOL STACK ── */
.stack-visual {
  margin: 3rem 0;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stack-layer {
  padding: 1.4rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  position: relative;
  overflow: hidden;
  flex-wrap: wrap;
}

.stack-layer::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
}

.sl-1 { background: rgba(61,154,138,0.08); }
.sl-1::before { background: var(--teal); }

.sl-2 { background: rgba(201,168,76,0.08); }
.sl-2::before { background: var(--gold); }

.sl-3 { background: rgba(196,98,45,0.08); }
.sl-3::before { background: var(--rust); }

.sl-4 { background: rgba(90,82,73,0.15); }
.sl-4::before { background: var(--ink-dim); }

.stack-name {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  font-weight: 500;
  min-width: 110px;
}

.sl-1 .stack-name { color: var(--teal); }
.sl-2 .stack-name { color: var(--gold); }
.sl-3 .stack-name { color: var(--rust); }
.sl-4 .stack-name { color: var(--ink-dim); }

.stack-desc {
  flex: 1;
  min-width: 200px;
  padding-left: 0.5rem;
  font-size: 0.88rem;
  color: var(--ink-muted);
  line-height: 1.55;
}

.stack-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.stack-pill {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.08em;
  padding: 0.22rem 0.55rem;
  border-radius: 2px;
  color: var(--ink-dim);
  border: 1px solid rgba(255,255,255,0.08);
  background: rgba(0,0,0,0.2);
}

/* ── EMERGENCE DIAGRAM ── */
.emergence {
  margin: 3rem 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.06);
}

.emerg-cell {
  background: var(--paper-card);
  padding: 1.5rem 1.25rem;
}

.emerg-org {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.emerg-cell:nth-child(1) .emerg-org { color: var(--teal); }
.emerg-cell:nth-child(2) .emerg-org { color: var(--gold); }
.emerg-cell:nth-child(3) .emerg-org { color: var(--rust); }

.emerg-proto {
  font-family: var(--serif);
  font-size: 1.7rem;
  font-weight: 400;
  color: var(--ink);
  margin-bottom: 0.45rem;
  letter-spacing: -0.01em;
}

.emerg-solve {
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--ink-muted);
  margin: 0;
}

/* ── Responsive ── */
@media (max-width: 760px) {
  body { font-size: 17px; }

  nav { padding: 0.85rem 1.25rem; }

  .hamburger { display: flex; }

  .nav-links {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 11, 9, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 1.5rem 2rem 2rem;
    gap: 1.25rem;
    border-bottom: 1px solid rgba(201, 168, 76, 0.12);
    display: none;
  }

  .nav-links.open { display: flex; }
  .nav-links a { font-size: 0.62rem; letter-spacing: 0.1em; }

  .hero { padding: 7rem 1.5rem 3rem; min-height: auto; }
  .hero h1 { font-size: clamp(2.4rem, 11vw, 3.6rem); max-width: none; }
  .hero-sub { font-size: 1.02rem; margin-bottom: 2.5rem; }
  .hero-meta { gap: 1rem; }

  .article { padding: 0 1.25rem; }
  .section { padding: 3.5rem 0; }

  .lead { font-size: 1.1rem; }
  .pullquote { margin: 2.5rem -0.5rem; padding: 1.75rem 1.25rem; font-size: 1.3rem; }
  .callout { padding: 1.25rem 1.25rem; }

  .stat-block { grid-template-columns: 1fr; }
  .stat-figure { font-size: 2.4rem; }

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

  .framework-matrix { margin: 2rem -1.25rem; padding: 0 0.5rem; }

  .stack-layer { padding: 1.1rem 1.1rem; }
  .stack-name { min-width: 0; flex-basis: 100%; }
  .stack-desc { padding-left: 0; font-size: 0.84rem; }
  .stack-examples { flex-basis: 100%; }

  .emergence { grid-template-columns: 1fr; }
  .emerg-proto { font-size: 1.5rem; }

  .code-block pre { font-size: 0.74rem; padding: 1rem; }

  .tease { padding: 1.75rem 1.25rem; margin: 2.5rem 0 1rem; }
  .tease h3 { font-size: 1.35rem; }

  .series-nav { padding: 3.5rem 1.25rem 2rem; }
  .series-list { grid-template-columns: 1fr; }

  .blog-listing { padding: 6rem 1.5rem 3rem; }
  .blog-grid { grid-template-columns: 1fr; }
}