/* =========================================================
   Co-Llab — Civic Modernism
   Earthen ink · archival cream · ember accents
   ========================================================= */

:root {
  --background: hsl(38 30% 96%);
  --foreground: hsl(195 45% 9%);
  --card: hsl(38 35% 98%);
  --secondary: hsl(38 25% 90%);
  --muted: hsl(38 20% 88%);
  --muted-foreground: hsl(195 15% 32%);
  --accent: hsl(18 75% 52%);
  --accent-strong: hsl(18 75% 46%);
  --accent-foreground: hsl(38 35% 98%);
  --gold: hsl(36 70% 48%);
  --border: hsl(195 20% 82%);

  --gradient-deep: linear-gradient(180deg, hsl(192 60% 10%), hsl(195 50% 6%));
  --shadow-arch: 0 30px 60px -30px hsl(192 60% 12% / .35);
  --shadow-ember: 0 20px 60px -20px hsl(18 75% 52% / .45);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--background);
  color: var(--foreground);
  font-family: 'Inter', system-ui, sans-serif;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

h1, h2, h3, h4 {
  font-family: 'Fraunces', Georgia, serif;
  font-optical-sizing: auto;
  letter-spacing: -0.02em;
  font-weight: 300;
}

em { font-style: italic; }
.accent { color: var(--accent); }
em.accent { font-style: italic; }

.mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }
.mono.small { font-size: .75rem; }
.mono.tiny { font-size: .625rem; letter-spacing: .25em; text-transform: uppercase; }

.container { max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; width: 100%; }
@media (min-width: 768px) { .container { padding: 0 3rem; } }

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ---------- Grain overlay ---------- */
.grain { position: relative; }
.grain::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
  opacity: .06;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- Animations ---------- */
@keyframes rise { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: translateY(0); } }
.rise { animation: rise .9s var(--ease) both; }

/* Scroll-reveal — elements start hidden, fade up when observed */
section h2,
.layer-card,
.stack-card,
.comp-col,
.layers-viz {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.in-view {
  opacity: 1 !important;
  transform: translateY(0) !important;
}

@keyframes ember-pulse { 0%,100% { opacity:.6; transform:scale(1); } 50% { opacity:1; transform:scale(1.05); } }
.ember-dot {
  display: inline-block; width: .5rem; height: .5rem;
  background: var(--accent);
  animation: ember-pulse 4s ease-in-out infinite;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .5rem;
  padding: 0 2rem; height: 3.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem; font-weight: 500;
  letter-spacing: .15em; text-transform: uppercase;
  cursor: pointer; border: 1px solid transparent;
  transition: all .3s var(--ease);
  white-space: nowrap;
}
.btn .arrow { transition: transform .3s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

.btn-accent {
  background: var(--accent);
  color: var(--accent-foreground);
  box-shadow: var(--shadow-ember);
}
.btn-accent:hover { background: var(--accent-strong); }

.btn-ghost-light {
  background: transparent;
  color: var(--background);
  border-color: transparent;
}
.btn-ghost-light:hover { background: rgba(255,255,255,.08); }

.btn-outline-ghost {
  background: transparent;
  color: var(--background);
  border-color: rgba(255,255,255,.4);
  height: 2.75rem; padding: 0 1.25rem;
}
.btn-outline-ghost:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-foreground); }

.btn-outline-ghost-light {
  background: transparent;
  color: var(--background);
  border-color: rgba(255,255,255,.3);
}
.btn-outline-ghost-light:hover { background: rgba(255,255,255,.1); }

/* ---------- NAV ---------- */
.nav {
  position: absolute; top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 1.5rem;
  display: flex; align-items: center; justify-content: space-between;
  color: var(--background);
}
@media (min-width: 768px) { .nav { padding: 1.5rem 3rem; } }

.nav-brand { display: flex; align-items: center; gap: .6rem; }
.brand-mark {
  width: 2.25rem; height: 2.25rem;
  border: 1px solid rgba(255,255,255,.4);
  display: grid; place-items: center;
  font-family: 'Fraunces', serif;
  font-size: 1.125rem; letter-spacing: -.05em;
  transition: all .3s var(--ease);
}
.brand-mark-3 {
  width: 2.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .05em;
}
.nav-brand:hover .brand-mark { background: var(--accent); border-color: var(--accent); }
.brand-name { font-family: 'Fraunces', serif; font-size: 1.25rem; letter-spacing: -.02em; }

.nav-links { display: none; gap: 2.5rem; font-family: 'JetBrains Mono', monospace; font-size: .75rem; text-transform: uppercase; letter-spacing: .15em; }
.nav-links a { color: rgba(255,255,255,.7); transition: color .2s; }
.nav-links a:hover { color: var(--background); }
@media (min-width: 900px) { .nav-links { display: flex; } }

/* ---------- HERO ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  width: 100%;
  overflow: hidden;
  background: var(--foreground);
  color: var(--background);
}
.hero-bg { position: absolute; inset: 0; }
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .7; }
.hero-scrim-v { position: absolute; inset: 0; background: linear-gradient(to top, var(--foreground), hsla(195,45%,9%,.7) 50%, hsla(195,45%,9%,.3)); }
.hero-scrim-h { position: absolute; inset: 0; background: linear-gradient(to right, hsla(195,45%,9%,.8), transparent 50%); }

.hero-inner {
  position: relative; z-index: 10;
  min-height: 100vh;
  display: flex; flex-direction: column;
}

.hero-content {
  padding: 8rem 1.5rem 5rem;
  flex: 1;
  display: flex; flex-direction: column; justify-content: flex-end;
}
@media (min-width: 768px) {
  .hero-content { padding: 8rem 3rem 8rem; }
}

.eyebrow { display: flex; align-items: center; gap: 1rem; margin-bottom: 2rem; flex-wrap: wrap; }
.eyebrow .mono { font-size: .75rem; text-transform: uppercase; letter-spacing: .3em; color: rgba(255,255,255,.7); }

/* Cycling identity rotor (the audience chip) */
.hero-rotor {
  position: relative;
  display: inline-block;
  padding: .3rem .65rem;
  border: 1px solid hsl(18 75% 52% / .55);
  background: hsl(18 75% 52% / .1);
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--accent);
  white-space: nowrap;
  vertical-align: middle;
}
.hero-rotor-sizer {
  visibility: hidden;
  display: inline-block;
  pointer-events: none;
}
.hero-rotor-item {
  position: absolute;
  top: .3rem; bottom: .3rem;
  left: .65rem; right: .65rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transform: translateY(6px);
  opacity: 0;
  transition: opacity .55s var(--ease), transform .55s var(--ease);
  pointer-events: none;
}
.hero-rotor-item.is-active {
  transform: translateY(0);
  opacity: 1;
}
.hero-rotor-item.is-leaving {
  transform: translateY(-6px);
  opacity: 0;
}
@media (prefers-reduced-motion: reduce) {
  .hero-rotor-item { transition: opacity .2s linear; transform: none !important; }
}

.hero-headline {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(2.75rem, 7vw, 6.5rem);
  line-height: .95;
  text-wrap: balance;
  margin-bottom: 2rem;
  max-width: 1100px;
}
.hero-headline em.accent { font-style: italic; color: var(--accent); }

.hero-lede {
  max-width: 36rem;
  font-size: 1.125rem;
  color: rgba(255,255,255,.75);
  line-height: 1.65;
  text-wrap: pretty;
  margin-bottom: 2.5rem;
}
@media (min-width: 768px) { .hero-lede { font-size: 1.25rem; } }

.hero-ctas { display: flex; flex-wrap: wrap; gap: 1rem; }

.hero-metrics {
  margin-top: 3.5rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding-top: 1.75rem;
  border-top: 1px solid rgba(255,255,255,.2);
  max-width: 56rem;
}
@media (min-width: 768px) { .hero-metrics { grid-template-columns: repeat(4, 1fr); } }
.hm-stat { padding: .5rem 1.5rem .5rem 0; }
.hm-stat + .hm-stat { border-left: 1px solid rgba(255,255,255,.15); padding-left: 1.5rem; }
@media (max-width: 767px) {
  .hm-stat + .hm-stat:nth-child(3) { border-left: none; padding-left: 0; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.15); margin-top: 1rem; }
  .hm-stat:nth-child(4) { padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,.15); margin-top: 1rem; }
}
.hm-val {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--background);
}
.hm-val em { font-style: italic; color: var(--accent); font-size: .6em; margin-left: .15em; }
.hm-lbl {
  margin-top: .65rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: rgba(255,255,255,.55);
}

.marquee {
  border-top: 1px solid rgba(255,255,255,.2);
  background: hsla(195,45%,9%,.4);
  backdrop-filter: blur(6px);
  overflow: hidden;
  padding: 1.25rem 0;
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 60s linear infinite;
}
.marquee-group {
  display: flex; align-items: center;
  gap: 2.5rem;
  padding: 0 1.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .25em;
  color: rgba(255,255,255,.65);
  white-space: nowrap;
}
.marquee-group .sep { color: var(--accent); opacity: .7; }
@keyframes marquee-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(-50%); }
}
@media (prefers-reduced-motion: reduce) {
  .marquee-track { animation: none; }
}

/* ---------- Eyebrows / Labels ---------- */
.eyebrow-mono {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .3em;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.eyebrow-mono.accent { color: var(--accent); }

/* ---------- COMPRESSION ---------- */
.compression {
  background: var(--background);
  color: var(--foreground);
  padding: 6rem 0;
}
@media (min-width: 768px) { .compression { padding: 9rem 0; } }

.comp-head { display: grid; gap: 2.5rem; margin-bottom: 4rem; }
@media (min-width: 768px) {
  .comp-head { grid-template-columns: 5fr 7fr; align-items: end; gap: 3rem; }
}
.comp-head h2 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
  text-wrap: balance;
}
.comp-head-right {
  font-size: 1.25rem;
  line-height: 1.65;
  color: var(--muted-foreground);
  text-wrap: pretty;
}

.comp-grid {
  display: grid;
  border-top: 1px solid var(--border);
}
@media (min-width: 768px) { .comp-grid { grid-template-columns: 1fr 1fr; } }

.comp-col { padding: 3rem 2rem 3rem 0; border-bottom: 1px solid var(--border); position: relative; }
.comp-col:last-child { border-bottom: 0; }
@media (min-width: 768px) {
  .comp-col { border-right: 1px solid var(--border); border-bottom: 0; }
  .comp-col:last-child { border-right: 0; padding: 3rem 0 3rem 3rem; }
}

.comp-col-right { background: var(--foreground); color: var(--background); margin-top: 0; }
.comp-col-right .comp-note { color: rgba(255,255,255,.8); }

.comp-badge {
  position: absolute;
  top: -.75rem; left: 0;
  padding: .25rem .75rem;
  background: var(--accent);
  color: var(--accent-foreground);
  font-family: 'JetBrains Mono', monospace;
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .25em;
}
@media (min-width: 768px) { .comp-badge { left: 3rem; } }

.mono-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .15em;
  color: var(--muted-foreground);
  margin-bottom: 1rem;
  margin-top: .5rem;
}
.mono-label.dark { color: rgba(255,255,255,.7); }

.stat-row { display: flex; align-items: baseline; gap: 1rem; margin-bottom: .5rem; }
.stat-num {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(4rem, 9vw, 8rem);
  line-height: 1;
}
.stat-num-sm {
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
}
.strike { color: hsl(195 15% 32% / .6); text-decoration: line-through; text-decoration-thickness: 1px; }
.mono.small.dark { color: rgba(255,255,255,.7); }

.comp-note {
  margin-top: 1.5rem;
  max-width: 28rem;
  color: var(--muted-foreground);
  line-height: 1.65;
}

/* ---------- DELIVERABLES ---------- */
.deliverables {
  background: var(--secondary);
  color: var(--foreground);
  padding: 6rem 0;
}
@media (min-width: 768px) { .deliverables { padding: 9rem 0; } }

.deliv-head { margin-bottom: 5rem; }
.deliv-head h2 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
  text-wrap: balance;
  max-width: 48rem;
}

.deliv-grid { display: grid; gap: 3rem; align-items: start; }
@media (min-width: 900px) { .deliv-grid { grid-template-columns: 7fr 5fr; } }

.deliv-items {
  display: grid;
  gap: 1px;
  background: var(--border);
}
@media (min-width: 640px) { .deliv-items { grid-template-columns: 1fr 1fr; } }

.deliv-item {
  background: var(--secondary);
  padding: 2rem;
  transition: background .5s var(--ease);
}
.deliv-item:hover { background: var(--background); }
.deliv-item:hover .rule-line,
.deliv-item:hover .rule-dot { background: var(--accent); }

.deliv-item-head { display: flex; align-items: center; margin-bottom: 1.5rem; gap: 1rem; }
.deliv-item-head .mono { color: var(--muted-foreground); letter-spacing: .15em; }
.rule-line { flex: 1; height: 1px; background: var(--border); transition: background .3s var(--ease); }
.rule-dot { width: .5rem; height: .5rem; background: var(--border); transition: background .3s var(--ease); }

.deliv-item h3 {
  font-size: 1.5rem;
  margin-bottom: .75rem;
  line-height: 1.15;
}
.deliv-item p {
  font-size: .875rem;
  color: var(--muted-foreground);
  line-height: 1.65;
}

.deliv-visuals { display: flex; flex-direction: column; gap: 1.5rem; position: sticky; top: 2rem; }
.deliv-img { overflow: hidden; background: var(--background); box-shadow: var(--shadow-arch); }
.deliv-img.tall { aspect-ratio: 4/5; }
.deliv-img.wide { aspect-ratio: 4/3; }
.deliv-img img { width: 100%; height: 100%; object-fit: cover; }
.caption {
  text-align: center;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: .15em;
}

.layers-sub {
  margin-top: 1.5rem;
  max-width: 44rem;
  font-size: 1.05rem;
  color: var(--muted-foreground);
  line-height: 1.65;
}

/* ---------- LAYERS SECTION (§ 02) ---------- */
.layers-section {
  background: var(--secondary);
  color: var(--foreground);
  padding: 6rem 0;
}
@media (min-width: 768px) { .layers-section { padding: 9rem 0; } }

.layers-grid {
  display: grid;
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  grid-template-columns: 1fr;
}
@media (min-width: 700px) { .layers-grid { grid-template-columns: 1fr 1fr; } }

.layer-card {
  background: var(--secondary);
  padding: 2.5rem 2rem 2.5rem;
  transition: background .35s var(--ease), box-shadow .35s var(--ease);
  position: relative;
  cursor: pointer;
  outline: none;
}
.layer-card:hover { background: var(--background); }
.layer-card:hover .layer-rule { background: var(--accent); }
.layer-card:focus-visible {
  background: var(--background);
  box-shadow: inset 0 0 0 2px var(--accent);
}

.layer-num {
  font-size: .75rem;
  color: var(--muted-foreground);
  text-transform: uppercase;
  letter-spacing: .15em;
}

.layer-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.layer-icon {
  width: 2.5rem;
  height: 2.5rem;
  color: var(--foreground);
  opacity: .7;
  flex-shrink: 0;
  transition: opacity .3s var(--ease), transform .4s var(--ease);
}
.layer-card:hover .layer-icon { opacity: 1; transform: scale(1.08); }
.layer-icon .fa { fill: var(--accent); fill-opacity: .35; stroke: none; }
.layer-icon .fb { fill: currentColor; fill-opacity: .12; stroke: none; }

/* ---------- LAYERS VIZ (animated) ---------- */
.layers-viz {
  position: relative;
  margin: 3.5rem 0;
  aspect-ratio: 16/10;
  background: hsl(38 30% 95%);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-arch);
  overflow: hidden;
  color: var(--foreground);
}
@media (min-width: 768px) {
  .layers-viz { aspect-ratio: 16/7; margin: 4.5rem 0 3.5rem; }
}

.layers-viz-svg {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}

.viz-svg-group {
  opacity: 0;
  transition: opacity .45s var(--ease);
}
/* each phase focuses one layer; previous layers dim to background context */
.layers-viz.p-1 .group-parcel { opacity: 1; }

.layers-viz.p-2 .group-parcel { opacity: .5; }
.layers-viz.p-2 .group-zoning { opacity: 1; }

.layers-viz.p-3 .group-parcel   { opacity: .4; }
.layers-viz.p-3 .group-zoning   { opacity: .25; }
.layers-viz.p-3 .group-envelope { opacity: 1; }

.layers-viz.p-4 .group-parcel   { opacity: .35; }
.layers-viz.p-4 .group-zoning   { opacity: 0; }
.layers-viz.p-4 .group-envelope { opacity: .35; }
.layers-viz.p-4 .group-massing  { opacity: 1; }

.viz-label {
  position: absolute;
  padding: .4rem .65rem;
  background: hsl(38 30% 96% / 0.88);
  border: 1px solid var(--border);
  font-family: 'JetBrains Mono', monospace;
  font-size: .625rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--muted-foreground);
  backdrop-filter: blur(4px);
  white-space: nowrap;
  z-index: 2;
}
.viz-label.top-left { top: 1rem; left: 1rem; }
.viz-label.top-right {
  top: 1rem; right: 1rem;
  color: var(--accent);
  border-color: hsl(18 75% 52% / .4);
}
.viz-label.bottom-left { bottom: 1rem; left: 1rem; }
.viz-label.bottom-right { bottom: 1rem; right: 1rem; }
@media (max-width: 720px) {
  .viz-label.top-left,
  .viz-label.bottom-left,
  .viz-label.bottom-right { display: none; }
  .viz-label { font-size: .55rem; padding: .3rem .5rem; letter-spacing: .12em; }
}

.viz-dots {
  position: absolute;
  top: 1rem; left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: .5rem;
  padding: .55rem .8rem;
  background: hsl(38 30% 96% / 0.88);
  border: 1px solid var(--border);
  backdrop-filter: blur(4px);
  z-index: 2;
}
@media (max-width: 720px) {
  .viz-dots {
    top: 1rem;
    bottom: auto;
    left: 1rem;
    transform: none;
  }
}
.viz-dot {
  width: .55rem; height: .55rem;
  border-radius: 50%;
  background: var(--border);
  border: none;
  cursor: pointer;
  padding: 0;
  transition: background .3s var(--ease), transform .3s var(--ease);
}
.viz-dot:hover { background: var(--muted-foreground); }
.viz-dot:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.viz-dot.active { background: var(--accent); transform: scale(1.35); }

@keyframes viz-scanline-sweep {
  0%   { transform: translateY(-8px); opacity: 0; }
  12%  { opacity: .65; }
  88%  { opacity: .65; }
  100% { transform: translateY(calc(100% + 8px)); opacity: 0; }
}
.viz-scanline {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 14px hsl(18 75% 52% / 0.4);
  animation: viz-scanline-sweep 2.6s linear infinite;
  pointer-events: none;
  z-index: 1;
}
@media (prefers-reduced-motion: reduce) {
  .viz-scanline { animation: none; display: none; }
  .viz-svg-group { transition: none; }
}

/* Card sync highlight (driven by JS toggling .layer-active) */
.layer-card.layer-active {
  background: var(--background);
  box-shadow: inset 3px 0 0 var(--accent);
}
.layer-card.layer-active .layer-rule { background: var(--accent); }
.layer-card.layer-active .layer-icon { opacity: 1; transform: scale(1.06); }

.layer-card h3 {
  font-size: clamp(1.75rem, 2.4vw, 2.25rem);
  line-height: 1.1;
  margin-bottom: 1rem;
}
.layer-card p {
  color: var(--muted-foreground);
  line-height: 1.65;
  max-width: 32rem;
}
.layer-rule {
  position: absolute;
  left: 2rem; right: 2rem;
  bottom: 0;
  height: 2px;
  background: transparent;
  transition: background .3s var(--ease);
}

.layers-visuals {
  margin-top: 3rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}
@media (min-width: 700px) { .layers-visuals { grid-template-columns: 1fr 1fr; gap: 1.5rem; } }
.layer-visual {
  position: relative;
  overflow: hidden;
  background: var(--background);
  box-shadow: var(--shadow-arch);
  aspect-ratio: 4/3;
}
.layer-visual img { width: 100%; height: 100%; object-fit: cover; }
.layer-visual figcaption {
  position: absolute;
  left: 1rem; bottom: 1rem;
  padding: .4rem .6rem;
  background: hsla(195,45%,9%,.82);
  color: var(--background);
  letter-spacing: .2em;
  text-transform: uppercase;
  backdrop-filter: blur(6px);
  font-size: .625rem;
}

/* ---------- WHO — organized groups ---------- */
.who-group-title {
  font-size: .75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .3em;
  color: var(--accent);
  margin-bottom: 1.25rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--border);
}
.who-list-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}
@media (min-width: 520px) { .who-list-2 { grid-template-columns: 1fr 1fr; column-gap: 2rem; } }
.who-list-2 li {
  font-family: 'Fraunces', serif;
  font-weight: 400;
  font-size: 1.35rem;
  line-height: 1.3;
  padding: .85rem 0;
  border-bottom: 1px solid var(--border);
  transition: color .3s var(--ease), padding-left .3s var(--ease);
  cursor: default;
}
.who-list-2 li:hover { color: var(--accent); padding-left: .5rem; }

.sample-inline-cta { margin-top: .5rem; width: 100%; justify-content: center; }

/* ---------- SAMPLE WORKBOOK ---------- */
.sample {
  background: var(--background);
  padding: 6rem 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
@media (min-width: 768px) { .sample { padding: 9rem 0; } }

.sample-inner {
  display: grid;
  gap: 3rem;
  align-items: center;
}
@media (min-width: 900px) { .sample-inner { grid-template-columns: 5fr 7fr; gap: 4rem; } }

.sample-copy h2 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
  margin: 1rem 0 1.5rem;
  text-wrap: balance;
}
.sample-copy p {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  line-height: 1.65;
  margin-bottom: 1.5rem;
  text-wrap: pretty;
}
.sample-meta { color: var(--muted-foreground); letter-spacing: .15em; text-transform: uppercase; margin-bottom: 2rem; display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; }
.sample-meta .dot { color: var(--accent); }

.sample-case {
  font-size: 1.05rem !important;
  line-height: 1.65;
  margin-bottom: 1.5rem !important;
  color: var(--foreground) !important;
}
.sample-case strong { color: var(--accent); font-weight: 500; }

.sample-meta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: 0 0 2rem 0;
  border-top: 1px solid var(--border);
}
@media (min-width: 520px) { .sample-meta-grid { grid-template-columns: 1fr 1fr; } }
.sample-meta-grid > div {
  display: grid;
  grid-template-columns: 90px 1fr;
  padding: .75rem 0;
  border-bottom: 1px solid var(--border);
  align-items: baseline;
  gap: .75rem;
}
@media (min-width: 520px) {
  .sample-meta-grid > div:nth-child(odd) { padding-right: 1.25rem; border-right: 1px solid var(--border); }
  .sample-meta-grid > div:nth-child(even) { padding-left: 1.25rem; }
}
.sample-meta-grid dt {
  font-family: 'JetBrains Mono', monospace;
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--muted-foreground);
}
.sample-meta-grid dd {
  font-family: 'Fraunces', serif;
  font-size: 1rem;
  line-height: 1.3;
  color: var(--foreground);
}

.sample-frame-wrap {
  position: relative;
  display: block;
  aspect-ratio: 4/3;
  background: var(--foreground);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-arch);
  overflow: hidden;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease);
}
.sample-frame-wrap:hover { transform: translateY(-4px); box-shadow: 0 40px 70px -30px hsl(192 60% 12% / .45); }

.sample-chrome {
  display: flex; align-items: center; gap: .5rem;
  padding: .6rem 1rem;
  background: hsl(195 45% 9%);
  color: rgba(255,255,255,.5);
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.sample-chrome .dot-red,
.sample-chrome .dot-amber,
.sample-chrome .dot-green {
  width: .6rem; height: .6rem; border-radius: 50%;
}
.dot-red { background: #ff5f56; }
.dot-amber { background: #ffbd2e; }
.dot-green { background: #27c93f; }
.sample-chrome .mono { margin-left: .75rem; font-size: .65rem; }

.sample-frame {
  width: 100%;
  height: calc(100% - 2.3rem);
  border: 0;
  background: var(--background);
  transform-origin: top left;
  pointer-events: none;
}

.sample-fade {
  position: absolute;
  left: 0; right: 0; bottom: 0; height: 30%;
  background: linear-gradient(to bottom, transparent, hsl(38 30% 96%));
  pointer-events: none;
}

/* ---------- STACK ---------- */
.stack {
  position: relative;
  background: var(--foreground);
  color: var(--background);
  padding: 6rem 0;
  overflow: hidden;
}
@media (min-width: 768px) { .stack { padding: 9rem 0; } }
.stack-grid { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .06; color: var(--background); }
.stack-inner { position: relative; }

.stack-head { max-width: 48rem; margin-bottom: 5rem; }
.stack-head h2 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
  text-wrap: balance;
}
.stack-head p {
  margin-top: 2rem;
  font-size: 1.125rem;
  color: rgba(255,255,255,.7);
  text-wrap: pretty;
}

.stack-grid-cards {
  display: grid; gap: 1px;
  background: rgba(255,255,255,.15);
}
@media (min-width: 768px) { .stack-grid-cards { grid-template-columns: repeat(3, 1fr); } }

.stack-card {
  background: var(--foreground);
  padding: 2.5rem;
}
.stack-card-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2.5rem; }
.chapter {
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 1.5rem;
  color: var(--accent);
}
.icon { width: 1.5rem; height: 1.5rem; color: rgba(255,255,255,.6); transition: color .3s var(--ease); }
.stack-card:hover .icon { color: var(--accent); }

.stack-card h3 {
  font-size: 1.875rem;
  margin-bottom: 1.25rem;
  line-height: 1.15;
}
.stack-card p {
  color: rgba(255,255,255,.65);
  line-height: 1.65;
}
.stack-card-rule {
  margin-top: 2.5rem;
  height: 1px;
  background: rgba(255,255,255,.15);
  transition: background .3s var(--ease);
}
.stack-card:hover .stack-card-rule { background: var(--accent); }

.stack-quote {
  margin-top: 4rem;
  max-width: 48rem;
  font-family: 'Fraunces', serif;
  font-style: italic;
  font-size: 1.25rem;
  color: rgba(255,255,255,.85);
  line-height: 1.65;
}
@media (min-width: 768px) { .stack-quote { font-size: 1.5rem; } }

/* ---------- WHO ---------- */
.who {
  background: var(--background);
  padding: 6rem 0;
}
@media (min-width: 768px) { .who { padding: 9rem 0; } }

.who-head { max-width: 56rem; margin-bottom: 4rem; }
.who-head h2 {
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  line-height: 1;
  text-wrap: balance;
  margin: 1rem 0 1.75rem;
}
.who-lede {
  font-size: 1.125rem;
  color: var(--muted-foreground);
  line-height: 1.7;
  text-wrap: pretty;
  max-width: 48rem;
}

.who-groups {
  display: grid;
  gap: 2.5rem;
  grid-template-columns: 1fr;
}
@media (min-width: 560px) { .who-groups { grid-template-columns: 1fr 1fr; gap: 3rem; } }

.who-groups-3 { grid-template-columns: 1fr; }
@media (min-width: 560px) { .who-groups-3 { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .who-groups-3 { grid-template-columns: 1fr 1fr 1fr; gap: 3.5rem; } }
.who-groups-3 .who-list-2 { grid-template-columns: 1fr; }

/* ---------- Regional skyline banner (closes § 05) ---------- */
.who-skyline {
  margin: 5rem 1.5rem 0;
  max-width: 1280px;
}
@media (min-width: 768px) { .who-skyline { margin: 6rem auto 0; padding: 0 3rem; } }
@media (min-width: 1280px) { .who-skyline { padding: 0; margin-left: auto; margin-right: auto; } }

.skyline-frame {
  position: relative;
  background: hsl(195 45% 7%);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: var(--shadow-arch), 0 0 0 1px hsl(195 45% 9% / .1);
}
.skyline-frame img {
  display: block;
  width: 100%;
  height: auto;
}

.skyline-labels {
  position: absolute;
  left: 1.25rem; right: 1.25rem;
  display: flex;
  justify-content: space-between;
  font-size: .625rem;
  letter-spacing: .15em;
  text-transform: uppercase;
  color: hsl(38 30% 94% / .55);
  z-index: 2;
  pointer-events: none;
  white-space: nowrap;
}
.skyline-labels-top { top: 1rem; }
.skyline-labels-bottom { bottom: 1rem; }
@media (max-width: 560px) {
  .skyline-labels { font-size: .5rem; letter-spacing: .08em; left: .75rem; right: .75rem; }
}

.skyline-caption {
  text-align: center;
  margin-top: 2rem;
  font-family: 'Fraunces', serif;
  font-weight: 300;
  font-size: clamp(1.15rem, 2.1vw, 1.5rem);
  line-height: 1.4;
  color: var(--muted-foreground);
  letter-spacing: -.01em;
}
.skyline-caption em { font-style: italic; }

/* ---------- CTA ---------- */
.cta {
  position: relative;
  background: var(--gradient-deep);
  color: var(--background);
  padding: 7rem 0;
  overflow: hidden;
  text-align: center;
}
@media (min-width: 768px) { .cta { padding: 10rem 0; } }

.cta-glow {
  position: absolute;
  border-radius: 9999px;
  filter: blur(80px);
  pointer-events: none;
}
.cta-glow-a {
  top: -8rem; right: -8rem;
  width: 500px; height: 500px;
  background: hsl(18 75% 52% / .2);
  animation: ember-pulse 4s ease-in-out infinite;
}
.cta-glow-b {
  bottom: -8rem; left: -8rem;
  width: 400px; height: 400px;
  background: hsl(36 70% 48% / .1);
}

.cta-inner { position: relative; max-width: 64rem; margin: 0 auto; }

.cta-eyebrow { display: inline-flex; align-items: center; gap: .75rem; margin-bottom: 2rem; }
.rule-short { width: 3rem; height: 1px; background: var(--accent); }
.cta-eyebrow .mono { color: rgba(255,255,255,.7); text-transform: uppercase; letter-spacing: .3em; }

.cta h2 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: .95;
  text-wrap: balance;
  margin-bottom: 2.5rem;
}

.cta p {
  font-size: 1.25rem;
  color: rgba(255,255,255,.75);
  max-width: 36rem;
  margin: 0 auto 3rem;
  text-wrap: pretty;
}

.cta-buttons { display: flex; flex-wrap: wrap; justify-content: center; gap: 1rem; }

/* ---------- FOOTER ---------- */
.footer {
  background: var(--foreground);
  color: rgba(255,255,255,.7);
  padding: 3rem 0;
}
.footer-inner {
  display: flex; flex-direction: column;
  gap: 2rem;
}
@media (min-width: 768px) {
  .footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
}
.footer-brand { display: flex; align-items: center; gap: .75rem; }
.footer-brand .brand-mark { border-color: rgba(255,255,255,.4); }
.footer-name { font-family: 'Fraunces', serif; font-size: 1.25rem; color: var(--background); }
.footer-cats { display: flex; flex-wrap: wrap; gap: .75rem 2.5rem; text-transform: uppercase; letter-spacing: .15em; }
.dim { color: rgba(255,255,255,.5); }