:root {
  /* Brand colors — locked to spec */
  --ivory: #F7F1E6;
  --ivory-2: #EFE7D6;
  --graphite: #0C1117;
  --navy-black: #07111F;
  --charcoal: #1A222C;
  --silver: #B8C0C7;
  --silver-2: #8A929B;
  --warm-gray: #D7D0C3;
  --cyan: #17D9E6;
  --cyan-soft: rgba(23, 217, 230, 0.18);
  --green: #32D583;
  --amber: #F4B84A;

  /* Layout */
  --maxw: 1280px;
  --pad-x: clamp(20px, 4vw, 56px);
  --rule: rgba(12, 17, 23, 0.10);
  --rule-strong: rgba(12, 17, 23, 0.22);
  --rule-dark: rgba(247, 241, 230, 0.10);
  --rule-dark-strong: rgba(247, 241, 230, 0.22);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--ivory);
  color: var(--graphite);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-size: 16px;
  line-height: 1.45;
}
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--cyan); color: var(--graphite); }

/* ------ Typography ------ */
.eyebrow {
  font-family: 'JetBrains Mono', ui-monospace, monospace;
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-2);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(23,217,230,0.15);
}
.eyebrow.dark { color: var(--silver); }

h1, h2, h3 {
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.05;
  margin: 0;
  text-wrap: balance;
}
.h-display {
  font-size: clamp(40px, 5.4vw, 76px);
  font-weight: 700;
  letter-spacing: -0.032em;
  line-height: 1.0;
}
.h-section {
  font-size: clamp(32px, 3.6vw, 50px);
  font-weight: 700;
  letter-spacing: -0.028em;
  line-height: 1.05;
}
.h-card {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: -0.012em;
  line-height: 1.2;
}
.lead {
  font-size: clamp(17px, 1.35vw, 19px);
  line-height: 1.55;
  color: rgba(12,17,23,0.72);
  text-wrap: pretty;
  max-width: 56ch;
}
.dark .lead { color: rgba(215, 208, 195, 0.78); }
.muted { color: rgba(12,17,23,0.6); }
.dark .muted { color: rgba(215, 208, 195, 0.6); }

/* ------ Layout ------ */
.page { width: 100%; overflow-x: clip; }
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}
.section { padding: clamp(72px, 9vw, 140px) 0; position: relative; }
.section.tight { padding: clamp(48px, 6vw, 88px) 0; }
.section.dark {
  background: var(--graphite);
  color: var(--ivory);
}
.section.dark.deeper { background: var(--navy-black); }
.section-rule { height: 1px; background: var(--rule); }
.dark .section-rule { background: var(--rule-dark); }

/* Section index marker */
.section-idx {
  display: flex; align-items: baseline; gap: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver-2);
  margin-bottom: 18px;
}
.section-idx .num {
  color: var(--graphite);
  font-weight: 600;
}
.dark .section-idx .num { color: var(--ivory); }

/* ------ Top bar ------ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: rgba(247,241,230,0.72);
  border-bottom: 1px solid var(--rule);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 64px;
}
.brand {
  display: inline-flex; align-items: center; gap: 12px;
  font-weight: 700; letter-spacing: -0.01em; font-size: 16px;
}
.brand .mark {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
}
.brand .mark img {
  transition: transform .35s cubic-bezier(.2,.7,.2,1);
}
.brand:hover .mark img { transform: rotate(-3deg) scale(1.04); }
.brand .tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--silver-2);
  padding-left: 10px;
  margin-left: 2px;
  border-left: 1px solid var(--rule-strong);
}
.topnav {
  display: flex; gap: 28px; align-items: center;
  font-size: 14px; color: rgba(12,17,23,0.7);
}
.topnav a:hover { color: var(--graphite); }
.topnav .cta {
  display: inline-flex; align-items: center; gap: 8px;
  height: 36px; padding: 0 14px;
  background: var(--graphite); color: var(--ivory);
  border-radius: 999px;
  font-size: 13px; font-weight: 500;
  border: 1px solid var(--graphite);
  transition: transform .2s ease, box-shadow .2s ease;
}
.topnav .cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px -8px rgba(12,17,23,0.4); }
.topnav .cta::after {
  content: ""; width: 8px; height: 8px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg) translateX(-1px);
}

/* ------ Hero ------ */
.hero {
  position: relative;
  padding-top: clamp(56px, 6vw, 92px);
  padding-bottom: clamp(56px, 6vw, 100px);
  isolation: isolate;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 540px at 78% 42%, rgba(23,217,230,0.06), transparent 60%),
    radial-gradient(1200px 700px at 18% 78%, rgba(12,17,23,0.06), transparent 60%);
  z-index: -1;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
  min-height: clamp(520px, 70vh, 720px);
}
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; min-height: auto; }
}
.hero-copy { max-width: 600px; }
.hero-copy h1 { margin-top: 18px; }
.hero-copy .lead { margin-top: 22px; }
.cta-row {
  display: inline-flex; flex-wrap: wrap; gap: 12px;
  margin-top: 36px;
}
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  height: 50px; padding: 0 22px;
  border-radius: 999px;
  font-size: 15px; font-weight: 500;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn-primary {
  background: var(--graphite); color: var(--ivory);
  border-color: var(--graphite);
  box-shadow: 0 1px 0 rgba(255,255,255,0.06) inset, 0 14px 30px -12px rgba(12,17,23,0.35);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 1px 0 rgba(255,255,255,0.08) inset, 0 18px 36px -10px rgba(12,17,23,0.5); }
.btn-ghost {
  background: transparent; color: var(--graphite);
  border-color: var(--rule-strong);
}
.btn-ghost:hover { background: rgba(12,17,23,0.04); }
.btn .arrow {
  width: 9px; height: 9px;
  border-right: 1.5px solid currentColor;
  border-top: 1.5px solid currentColor;
  transform: rotate(45deg);
}
.btn .play {
  width: 0; height: 0;
  border-left: 7px solid currentColor;
  border-top: 5px solid transparent;
  border-bottom: 5px solid transparent;
  margin-right: -2px;
}

.hero-meta {
  display: flex; gap: 28px; margin-top: 44px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--silver-2);
  flex-wrap: wrap;
}
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta .dot { width: 6px; height: 6px; border-radius: 50%; }
.dot.green { background: var(--green); box-shadow: 0 0 0 3px rgba(50,213,131,0.18); }
.dot.amber { background: var(--amber); box-shadow: 0 0 0 3px rgba(244,184,74,0.18); }
.dot.cyan { background: var(--cyan); box-shadow: 0 0 0 3px rgba(23,217,230,0.18); }

/* Hero object */
.hero-object {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  max-width: 620px;
  justify-self: end;
  display: grid;
  place-items: center;
  isolation: isolate;
}
.hero-object .grain {
  position: absolute; inset: -10%;
  background-image:
    linear-gradient(to right, rgba(12,17,23,0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(12,17,23,0.045) 1px, transparent 1px);
  background-size: 36px 36px;
  mask: radial-gradient(closest-side at 50% 55%, #000 35%, transparent 80%);
  -webkit-mask: radial-gradient(closest-side at 50% 55%, #000 35%, transparent 80%);
  z-index: -1;
}
.hero-object .ring {
  position: absolute;
  inset: 6%;
  border: 1px dashed rgba(12,17,23,0.12);
  border-radius: 50%;
  animation: spin 80s linear infinite;
}
.hero-object .ring.inner {
  inset: 18%;
  border-color: rgba(23,217,230,0.25);
  animation-duration: 50s;
  animation-direction: reverse;
}
@keyframes spin { to { transform: rotate(360deg); } }
.hero-object .mark-3d {
  width: 78%;
  height: 78%;
  object-fit: contain;
  filter: drop-shadow(0 30px 50px rgba(12,17,23,0.25)) drop-shadow(0 12px 24px rgba(12,17,23,0.18));
  animation: floaty 9s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0) rotate(0); }
  50% { transform: translateY(-10px) rotate(-0.6deg); }
}
/* Floating annotation labels around the mark */
.anno {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  background: rgba(247,241,230,0.85);
  backdrop-filter: blur(4px);
  border: 1px solid var(--rule-strong);
  padding: 6px 10px;
  display: inline-flex; align-items: center; gap: 8px;
  white-space: nowrap;
  box-shadow: 0 6px 18px -8px rgba(12,17,23,0.2);
}
.anno .pip { width: 6px; height: 6px; border-radius: 50%; }
.anno .lead-line {
  position: absolute;
  background: rgba(12,17,23,0.5);
  height: 1px;
}
.anno-a { top: 14%; left: -8%; }
.anno-a .lead-line { right: -56px; top: 50%; width: 50px; }
.anno-b { top: 38%; right: -8%; }
.anno-b .lead-line { left: -56px; top: 50%; width: 50px; }
.anno-c { bottom: 14%; left: 4%; }
.anno-c .lead-line { right: -42px; top: 50%; width: 36px; }

/* ------ Chips (mono) ------ */
.chip-row {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; font-weight: 500;
  letter-spacing: 0;
  color: rgba(12,17,23,0.85);
  background: rgba(12,17,23,0.04);
  border: 1px solid rgba(12,17,23,0.08);
  padding: 5px 10px;
  border-radius: 3px;
  white-space: nowrap;
}
.chip::before {
  content: ""; width: 5px; height: 5px;
  background: var(--silver-2); border-radius: 50%;
}
.dark .chip {
  color: rgba(247,241,230,0.85);
  background: rgba(247,241,230,0.04);
  border-color: rgba(247,241,230,0.1);
}
.chip.cyan::before { background: var(--cyan); }
.chip.green::before { background: var(--green); }
.chip.amber::before { background: var(--amber); }

/* ------ Marquee / Stack strip ------ */
.stack-strip {
  border-top: 1px solid var(--rule);
  border-bottom: 1px solid var(--rule);
  padding: 22px 0;
  overflow: hidden;
}
.stack-strip .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-2);
  margin-bottom: 14px;
}
.stack-row {
  display: flex; align-items: center; gap: 56px;
  font-size: 17px; font-weight: 500;
  color: rgba(12,17,23,0.6);
  white-space: nowrap;
  animation: scroll-x 60s linear infinite;
  will-change: transform;
}
@keyframes scroll-x { to { transform: translateX(-50%); } }
.stack-row span { display: inline-flex; align-items: center; gap: 8px; }
.stack-row span::after {
  content: ""; width: 5px; height: 5px;
  background: var(--silver);
  border-radius: 50%;
  margin-left: 56px;
}

/* ------ Problem section ------ */
.problem {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
@media (max-width: 920px) { .problem { grid-template-columns: 1fr; } }
.problem h2 { font-size: clamp(32px, 4.2vw, 56px); }
.problem-list { display: flex; flex-direction: column; gap: 0; margin-top: 4px; }
.problem-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 28px;
  padding: 28px 0;
  border-top: 1px solid var(--rule);
  align-items: start;
}
.problem-row:last-child { border-bottom: 1px solid var(--rule); }
.problem-row .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.16em;
  color: var(--silver-2);
  padding-top: 4px;
}
.problem-row .body strong { display: block; font-size: 19px; font-weight: 600; letter-spacing: -0.012em; margin-bottom: 6px; }
.problem-row .body p { margin: 0; color: rgba(12,17,23,0.65); font-size: 15.5px; line-height: 1.55; }

/* ------ Slabs (six-slab sprint) ------ */
.slabs-bg {
  position: relative; isolation: isolate;
}
.slabs-bg::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(900px 480px at 84% 12%, rgba(23,217,230,0.07), transparent 60%),
    radial-gradient(900px 480px at 12% 92%, rgba(23,217,230,0.04), transparent 60%);
  z-index: 0; pointer-events: none;
}
.slabs-bg > .wrap { position: relative; z-index: 1; }
.slabs-header { max-width: 760px; margin-bottom: 56px; }
.slabs-header h2 { margin-top: 18px; }
.slabs-header .lead { margin-top: 18px; }
.slabs-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}
@media (max-width: 1100px) { .slabs-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 700px) { .slabs-grid { grid-template-columns: 1fr; } }

.slab {
  position: relative;
  background: linear-gradient(180deg, #11171F 0%, #0A0F15 100%);
  border: 1px solid rgba(247,241,230,0.07);
  border-radius: 14px;
  padding: 28px 26px 26px;
  min-height: 380px;
  display: flex; flex-direction: column;
  isolation: isolate;
  overflow: hidden;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), border-color .25s ease, box-shadow .35s ease;
  cursor: pointer;
}
.slab::before {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(247,241,230,0.05), transparent 22%);
  pointer-events: none; z-index: 1;
}
.slab::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(380px 200px at 0% 0%, rgba(23,217,230,0.10), transparent 60%);
  opacity: 0;
  transition: opacity .35s ease;
  pointer-events: none; z-index: 0;
}
.slab:hover, .slab[data-open="true"] {
  transform: translateY(-3px);
  border-color: rgba(23,217,230,0.30);
  box-shadow: 0 24px 60px -28px rgba(0,0,0,0.6), 0 0 0 1px rgba(23,217,230,0.06);
}
.slab:hover::after, .slab[data-open="true"]::after { opacity: 1; }

.slab-head {
  position: relative; z-index: 2;
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 18px;
}
.slab-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px; letter-spacing: 0.16em;
  color: var(--silver-2);
}
.slab-pip {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--cyan); box-shadow: 0 0 0 3px rgba(23,217,230,0.18);
}
.slab h3 {
  position: relative; z-index: 2;
  color: var(--ivory);
  font-size: 24px; font-weight: 600;
  letter-spacing: -0.014em;
  line-height: 1.18;
}
.slab .desc {
  position: relative; z-index: 2;
  font-size: 14.5px; line-height: 1.55;
  color: rgba(215,208,195,0.7);
  margin-top: 14px;
  max-width: 38ch;
}
.slab .chips {
  position: relative; z-index: 2;
  margin-top: auto; padding-top: 22px;
}

/* Visual diagram in slab — render distinct per slab */
.slab-viz {
  position: relative; z-index: 2;
  height: 100px;
  margin-top: 18px;
  border-radius: 8px;
  background: rgba(247,241,230,0.025);
  border: 1px solid rgba(247,241,230,0.06);
  overflow: hidden;
}

/* Slab 1: system map */
.viz-map { padding: 12px; }
.viz-map .node {
  position: absolute;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px; letter-spacing: 0.04em;
  color: rgba(247,241,230,0.7);
  background: rgba(247,241,230,0.06);
  border: 1px solid rgba(247,241,230,0.12);
  padding: 3px 7px;
  border-radius: 2px;
}
.viz-map .node.flag { border-color: rgba(244,184,74,0.4); color: var(--amber); }
.viz-map .wire { position: absolute; height: 1px; background: rgba(23,217,230,0.45); }
.viz-map .wire.v { width: 1px; height: 18px; }

/* Slab 2: training loop */
.viz-loop { display: flex; align-items: center; justify-content: center; gap: 18px; padding: 12px; }
.viz-loop .step {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px; letter-spacing: 0.08em;
  color: rgba(247,241,230,0.6);
  text-transform: uppercase;
}
.viz-loop .step .blip {
  width: 16px; height: 16px; border-radius: 50%;
  border: 1px solid rgba(247,241,230,0.3);
  background: rgba(247,241,230,0.05);
}
.viz-loop .step.active .blip { border-color: var(--cyan); background: rgba(23,217,230,0.2); box-shadow: 0 0 0 3px rgba(23,217,230,0.12); }
.viz-loop .arr { width: 16px; height: 1px; background: rgba(247,241,230,0.25); position: relative; }
.viz-loop .arr::after { content: ""; position: absolute; right: 0; top: -2px; width: 4px; height: 4px; border-top: 1px solid rgba(247,241,230,0.5); border-right: 1px solid rgba(247,241,230,0.5); transform: rotate(45deg); }

/* Slab 3: connectors / CLI */
.viz-cli {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px;
  color: rgba(215,208,195,0.7);
  padding: 12px 14px;
  line-height: 1.6;
}
.viz-cli .prompt { color: var(--cyan); }
.viz-cli .ok { color: var(--green); }
.viz-cli .file { color: rgba(247,241,230,0.85); }

/* Slab 4: knowledge stacks */
.viz-stack { padding: 14px; }
.viz-stack .doc {
  position: absolute;
  width: 64px; height: 72px;
  background: linear-gradient(180deg, rgba(247,241,230,0.08), rgba(247,241,230,0.02));
  border: 1px solid rgba(247,241,230,0.14);
  border-radius: 3px;
}
.viz-stack .doc::before, .viz-stack .doc::after {
  content: ""; position: absolute; left: 10px; right: 10px;
  height: 1px; background: rgba(247,241,230,0.16);
}
.viz-stack .doc::before { top: 14px; }
.viz-stack .doc::after { top: 22px; right: 22px; }
.viz-stack .core {
  position: absolute;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(23,217,230,0.5);
  background: radial-gradient(circle, rgba(23,217,230,0.25), transparent 70%);
  right: 36px; top: 50%; transform: translateY(-50%);
}

/* Slab 5: routines / approval */
.viz-rail { padding: 14px; }
.viz-rail .track { position: absolute; left: 14px; right: 14px; top: 30px; height: 1px; background: rgba(247,241,230,0.16); }
.viz-rail .tick {
  position: absolute; top: 26px;
  width: 1px; height: 9px; background: rgba(247,241,230,0.3);
}
.viz-rail .gate {
  position: absolute; top: 14px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px; letter-spacing: 0.08em;
  padding: 3px 6px; border-radius: 2px;
  text-transform: uppercase;
  background: rgba(244,184,74,0.12); color: var(--amber);
  border: 1px solid rgba(244,184,74,0.4);
}
.viz-rail .scheduled {
  position: absolute; top: 56px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px; color: rgba(215,208,195,0.6);
  display: inline-flex; align-items: center; gap: 6px;
}
.viz-rail .scheduled::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 2px rgba(50,213,131,0.2); }

/* Slab 6: shipped artifacts */
.viz-ship { padding: 12px; display: flex; gap: 8px; flex-wrap: wrap; align-content: center; }
.viz-ship .arti {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9.5px;
  padding: 4px 8px;
  border-radius: 2px;
  background: rgba(50,213,131,0.06);
  border: 1px solid rgba(50,213,131,0.3);
  color: rgba(247,241,230,0.85);
  display: inline-flex; align-items: center; gap: 6px;
}
.viz-ship .arti::before { content: "✓"; color: var(--green); font-size: 10px; }
.viz-ship .arti.muted {
  background: rgba(247,241,230,0.04);
  border-color: rgba(247,241,230,0.12);
  color: rgba(215,208,195,0.55);
}
.viz-ship .arti.muted::before { content: "—"; color: rgba(215,208,195,0.4); }

/* Proof rail */
.proof-section { padding: 0; background: var(--navy-black); border-top: 1px solid var(--rule-dark); border-bottom: 1px solid var(--rule-dark); }
.proof-rail {
  display: flex; align-items: center; justify-content: space-between;
  padding: 38px var(--pad-x);
  gap: 20px;
  flex-wrap: wrap;
  max-width: var(--maxw); margin: 0 auto;
}
.proof-rail .label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver-2);
}
.proof-steps {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  font-family: 'JetBrains Mono', monospace;
}
.proof-step {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 14px;
  border: 1px solid rgba(247,241,230,0.16);
  background: rgba(247,241,230,0.03);
  border-radius: 999px;
  color: rgba(247,241,230,0.9);
  font-size: 13px; letter-spacing: 0.02em;
}
.proof-step .pip { width: 7px; height: 7px; border-radius: 50%; background: var(--silver); }
.proof-step.active { border-color: rgba(23,217,230,0.5); background: rgba(23,217,230,0.08); }
.proof-step.active .pip { background: var(--cyan); box-shadow: 0 0 0 3px rgba(23,217,230,0.18); }
.proof-step.approval .pip { background: var(--amber); box-shadow: 0 0 0 3px rgba(244,184,74,0.18); }
.proof-step.verified .pip { background: var(--green); box-shadow: 0 0 0 3px rgba(50,213,131,0.18); }
.proof-arrow { color: rgba(215,208,195,0.4); font-size: 14px; }

/* ------ Example systems ------ */
.systems-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
@media (max-width: 920px) { .systems-grid { grid-template-columns: 1fr; } }
.sys-card {
  background: rgba(247,241,230,0.6);
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 26px 24px 24px;
  display: flex; flex-direction: column; gap: 16px;
  min-height: 240px;
}
.sys-card h4 {
  margin: 0;
  font-size: 16px; font-weight: 600;
  letter-spacing: -0.01em;
}
.sys-card .sys-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.16em;
  color: var(--silver-2);
  text-transform: uppercase;
}
.sys-card p {
  margin: 0;
  font-size: 14.5px; line-height: 1.55;
  color: rgba(12,17,23,0.65);
}

/* ------ Sprint offer ------ */
.sprint {
  background: var(--graphite);
  color: var(--ivory);
}
.sprint-header { max-width: 760px; }
.sprint-header h2 { margin-top: 16px; color: var(--ivory); }
.sprint-header .lead { color: rgba(215,208,195,0.78); margin-top: 16px; }
.sprint-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 48px;
}
@media (max-width: 920px) { .sprint-grid { grid-template-columns: 1fr; } }
.tier {
  border: 1px solid rgba(247,241,230,0.12);
  border-radius: 12px;
  padding: 30px 26px;
  background: linear-gradient(180deg, rgba(247,241,230,0.03), rgba(247,241,230,0));
  display: flex; flex-direction: column;
  gap: 18px;
  position: relative;
}
.tier.feature {
  border-color: rgba(23,217,230,0.35);
  background:
    radial-gradient(500px 280px at 0% 0%, rgba(23,217,230,0.10), transparent 60%),
    linear-gradient(180deg, rgba(247,241,230,0.04), rgba(247,241,230,0));
}
.tier .tier-tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--silver);
  display: inline-flex; align-items: center; gap: 8px;
}
.tier.feature .tier-tag::after {
  content: "MOST COMMON";
  font-size: 10px;
  padding: 2px 7px;
  border: 1px solid rgba(23,217,230,0.4);
  color: var(--cyan);
  border-radius: 2px;
  margin-left: 4px;
}
.tier h3 { color: var(--ivory); font-size: 24px; font-weight: 600; letter-spacing: -0.014em; }
.tier .price {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px; color: var(--silver-2);
  letter-spacing: 0.05em;
}
.tier ul { list-style: none; padding: 0; margin: 8px 0 0; display: flex; flex-direction: column; gap: 10px; }
.tier li {
  font-size: 14.5px; line-height: 1.5;
  color: rgba(215,208,195,0.85);
  display: grid; grid-template-columns: 14px 1fr; gap: 10px;
}
.tier li::before {
  content: "";
  display: inline-block;
  width: 8px; height: 8px;
  border-right: 1.5px solid var(--green);
  border-bottom: 1.5px solid var(--green);
  transform: rotate(45deg) translate(-1px, -2px);
  margin-top: 2px;
}

/* ------ Operator trust ------ */
.operator {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(40px, 6vw, 100px);
  align-items: start;
}
@media (max-width: 920px) { .operator { grid-template-columns: 1fr; } }
.operator h2 { font-size: clamp(30px, 3.6vw, 48px); }
.principles { display: flex; flex-direction: column; gap: 18px; margin-top: 8px; }
.principle {
  border: 1px solid var(--rule);
  border-radius: 10px;
  padding: 22px 24px;
  background: rgba(247,241,230,0.6);
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 22px;
  align-items: start;
}
.principle .num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.18em;
  color: var(--silver-2);
  padding-top: 2px;
}
.principle h4 {
  margin: 0 0 6px;
  font-size: 17px; font-weight: 600;
  letter-spacing: -0.012em;
}
.principle p { margin: 0; font-size: 14.5px; line-height: 1.55; color: rgba(12,17,23,0.65); }

/* ------ Final CTA / form ------ */
.cta-final {
  background: var(--ivory);
  border-top: 1px solid var(--rule);
}
.cta-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: clamp(36px, 6vw, 96px);
  align-items: start;
}
@media (max-width: 920px) { .cta-grid { grid-template-columns: 1fr; } }
.cta-grid h2 { margin-top: 16px; }
.cta-grid .lead { margin-top: 18px; }
.cta-aside {
  margin-top: 28px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--silver-2);
  letter-spacing: 0.04em;
  display: flex; flex-direction: column; gap: 8px;
}
.cta-aside a { color: var(--graphite); text-decoration: underline; text-underline-offset: 3px; }

.form-card {
  background: #fff;
  border: 1px solid var(--rule);
  border-radius: 14px;
  padding: 32px;
  box-shadow: 0 30px 60px -30px rgba(12,17,23,0.18);
}
.form-row { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.form-row.split { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row.split > div { display: flex; flex-direction: column; gap: 6px; }
.form-row label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10.5px; letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--silver-2);
}
.form-row input,
.form-row select,
.form-row textarea {
  font-family: inherit;
  font-size: 14.5px;
  padding: 11px 14px;
  border: 1px solid var(--rule-strong);
  border-radius: 8px;
  background: #fff;
  color: var(--graphite);
  outline: none;
  transition: border-color .15s ease, box-shadow .15s ease;
}
.form-row input:focus,
.form-row select:focus,
.form-row textarea:focus {
  border-color: var(--graphite);
  box-shadow: 0 0 0 3px rgba(12,17,23,0.06);
}
.form-row textarea { min-height: 88px; resize: vertical; }
.form-row .hint { font-size: 12px; color: var(--silver-2); }
.form-submit {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  margin-top: 4px;
}
.form-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px; letter-spacing: 0.1em;
  color: var(--silver-2);
  display: inline-flex; align-items: center; gap: 8px;
}
.form-success {
  padding: 28px;
  border: 1px solid rgba(50,213,131,0.4);
  background: rgba(50,213,131,0.06);
  border-radius: 10px;
  font-size: 15px;
  color: var(--graphite);
}
.form-success .check {
  display: inline-flex; align-items: center; justify-content: center;
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--green); color: var(--graphite);
  font-weight: 700; margin-right: 12px;
}

/* ------ Footer ------ */
footer {
  border-top: 1px solid var(--rule);
  padding: 36px 0;
}
.foot-inner {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 13px; color: rgba(12,17,23,0.6); gap: 24px; flex-wrap: wrap;
}
.foot-links { display: flex; gap: 22px; }
.foot-links a:hover { color: var(--graphite); }

/* ------ Reveal animation ------ */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .7s ease, transform .7s cubic-bezier(.2,.7,.2,1);
}
.reveal.in {
  opacity: 1; transform: none;
}
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .stack-row { animation: none; }
  .hero-object .ring { animation: none; }
  .hero-object .mark-3d { animation: none; }
}

/* ------ Teardown stage — sticky video pinned behind intro + slabs ------ */
.teardown-stage {
  position: relative;
  background: var(--graphite);
  isolation: isolate;
}
.teardown-stage-bg {
  position: sticky;
  top: 0;
  width: 100%;
  height: 100vh;
  overflow: hidden;
  z-index: 0;
  pointer-events: none;
}
.teardown-stage-video,
.teardown-stage-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.38;
  filter: contrast(1.0) saturate(0.85);
  will-change: contents;
}
.teardown-stage-veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(1100px 700px at 50% 50%, transparent 0%, rgba(7,17,31,0.35) 55%, rgba(7,17,31,0.85) 100%),
    linear-gradient(180deg, var(--graphite) 0%, rgba(7,17,31,0.2) 18%, rgba(7,17,31,0.2) 82%, var(--graphite) 100%);
  pointer-events: none;
}
.teardown-stage-grain {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(to right, rgba(247,241,230,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(247,241,230,0.03) 1px, transparent 1px);
  background-size: 56px 56px;
  mask: linear-gradient(180deg, transparent 0%, #000 30%, #000 70%, transparent 100%);
  -webkit-mask: linear-gradient(180deg, transparent 0%, #000 30%, #000 70%, transparent 100%);
  pointer-events: none;
}
.teardown-stage-content {
  position: relative;
  margin-top: -100vh;   /* pull content up to overlay the sticky bg */
  z-index: 1;
}
/* Bottom fade so the video doesn't sharp-cut into the proof rail below */
.teardown-stage-fade {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 200px;
  background: linear-gradient(180deg, transparent 0%, var(--graphite) 100%);
  z-index: 2;
  pointer-events: none;
}

/* The intro & slabs sit on top of the pinned video — make their bgs transparent */
.teardown-intro {
  padding: clamp(120px, 16vw, 220px) 0 clamp(60px, 8vw, 100px);
  background: transparent !important;
  color: var(--ivory);
  position: relative;
}
.teardown-content { max-width: 760px; }

/* Give the teardown stage more vertical room so each scroll px maps to less video motion — the slow rate is what makes it feel smooth. */
.section.dark.slabs-bg {
  background: transparent !important;
  padding-top: clamp(20px, 3vw, 48px);
  padding-bottom: clamp(160px, 22vw, 320px);
}
.section.dark.slabs-bg::before {
  /* keep the cyan corner haze, but no opaque base */
  background:
    radial-gradient(900px 480px at 84% 12%, rgba(23,217,230,0.10), transparent 60%),
    radial-gradient(900px 480px at 12% 92%, rgba(23,217,230,0.06), transparent 60%);
}

/* Make the slab cards a bit more opaque so they read cleanly over busy video */
.slab {
  background: linear-gradient(180deg, rgba(17,23,31,0.96) 0%, rgba(10,15,21,0.96) 100%);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

@media (prefers-reduced-motion: reduce) {
  .teardown-stage-video,
  .teardown-stage-canvas { /* still render first frame as static bg */ }
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
  opacity: 0.32;
  mix-blend-mode: multiply;
  filter: contrast(0.95) saturate(0.7) blur(2px);
  pointer-events: none;
}
.hero-video-veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(800px 600px at 30% 50%, rgba(247,241,230,0.95), rgba(247,241,230,0.55) 60%, var(--ivory) 100%),
    linear-gradient(180deg, rgba(247,241,230,0.4) 0%, rgba(247,241,230,0.7) 70%, var(--ivory) 100%);
  z-index: -1;
  pointer-events: none;
}