:root {
  color-scheme: dark;
  --ink: #f5f7fb;
  --muted: #a7b1c3;
  --quiet: #748197;
  --night: #08111f;
  --night-deep: #050b14;
  --panel: #0d1929;
  --panel-raised: #122136;
  --line: rgba(158, 180, 211, 0.18);
  --line-strong: rgba(158, 180, 211, 0.34);
  --blue: #5b8cff;
  --cyan: #45d3d0;
  --amber: #f5ad42;
  --red: #ff6b72;
  --green: #60d394;
  --amber-text: #f5ad42;
  --cyan-text: #45d3d0;
  --badge-blue-text: #abc0f5;
  --badge-cyan-text: #91e4e2;
  --badge-amber-text: #ffd18c;
  --state-amber-text: #ffcc80;
  --link-text: #a9c1ff;
  --footer-note: #8390a4;
  --header-bg: rgba(8, 17, 31, 0.76);
  --header-bg-solid: rgba(8, 17, 31, 0.96);
  --nav-text: #c4ccda;
  --hero-text: #bdc7d6;
  --panel-gradient-a: rgba(18, 33, 54, 0.9);
  --panel-gradient-b: rgba(9, 18, 31, 0.9);
  --list-text: #c5cedb;
  --proof-bg: #0b1626;
  --proof-time: #c6d0df;
  --controls-bg: #0a1422;
  --path-bg: #0a1422;
  --path-ink: #f5f7fb;
  --path-muted: #a7b1c3;
  --contract-bg: #111f32;
  --contract-panel: rgba(255, 255, 255, 0.04);
  --contract-text: #c6d0df;
  --contract-denied: #ff9298;
  --contract-allowed: #66dfc8;
  --image-frame: #0c1727;
  --theme-icon: "dark";
  --max-width: 1240px;
  --radius: 18px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
}

:root[data-theme="light"] {
  color-scheme: light;
  --ink: #0b1b2b;
  --muted: #4c5b6e;
  --quiet: #526278;
  --night: #f4f7fa;
  --night-deep: #e8edf3;
  --panel: #ffffff;
  --panel-raised: #edf2f7;
  --line: rgba(24, 50, 82, 0.15);
  --line-strong: rgba(24, 50, 82, 0.3);
  --shadow: 0 24px 70px rgba(30, 55, 85, 0.14);
  --header-bg: rgba(244, 247, 250, 0.78);
  --header-bg-solid: rgba(244, 247, 250, 0.97);
  --nav-text: #43536a;
  --hero-text: #45566c;
  --panel-gradient-a: rgba(255, 255, 255, 0.98);
  --panel-gradient-b: rgba(235, 241, 247, 0.98);
  --list-text: #34465c;
  --proof-bg: #ffffff;
  --proof-time: #45566c;
  --controls-bg: #e8edf3;
  --path-bg: #e8ecf2;
  --path-ink: #0b1727;
  --path-muted: #4c5b6e;
  --contract-bg: #dce3eb;
  --contract-panel: rgba(255, 255, 255, 0.58);
  --contract-text: #37465a;
  --contract-denied: #a52d35;
  --contract-allowed: #0d695f;
  --image-frame: #ffffff;
  --theme-icon: "light";
  --amber-text: #8a5000;
  --cyan-text: #096a70;
  --badge-blue-text: #2453a6;
  --badge-cyan-text: #0d696f;
  --badge-amber-text: #744400;
  --state-amber-text: #744400;
  --link-text: #2859a8;
  --footer-note: #526278;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --ink: #0b1b2b;
    --muted: #4c5b6e;
    --quiet: #526278;
    --night: #f4f7fa;
    --night-deep: #e8edf3;
    --panel: #ffffff;
    --panel-raised: #edf2f7;
    --line: rgba(24, 50, 82, 0.15);
    --line-strong: rgba(24, 50, 82, 0.3);
    --shadow: 0 24px 70px rgba(30, 55, 85, 0.14);
    --header-bg: rgba(244, 247, 250, 0.78);
    --header-bg-solid: rgba(244, 247, 250, 0.97);
    --nav-text: #43536a;
    --hero-text: #45566c;
    --panel-gradient-a: rgba(255, 255, 255, 0.98);
    --panel-gradient-b: rgba(235, 241, 247, 0.98);
    --list-text: #34465c;
    --proof-bg: #ffffff;
    --proof-time: #45566c;
    --controls-bg: #e8edf3;
    --path-bg: #e8ecf2;
    --path-ink: #0b1727;
    --path-muted: #4c5b6e;
    --contract-bg: #dce3eb;
    --contract-panel: rgba(255, 255, 255, 0.58);
    --contract-text: #37465a;
    --contract-denied: #a52d35;
    --contract-allowed: #0d695f;
    --image-frame: #ffffff;
    --theme-icon: "light";
    --amber-text: #8a5000;
    --cyan-text: #096a70;
    --badge-blue-text: #2453a6;
    --badge-cyan-text: #0d696f;
    --badge-amber-text: #744400;
    --state-amber-text: #744400;
    --link-text: #2859a8;
    --footer-note: #526278;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 68% -20%, rgba(47, 92, 181, 0.22), transparent 34rem),
    var(--night);
  font-size: 16px;
  line-height: 1.6;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 120 120' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--amber);
  outline-offset: 4px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: 100;
  padding: 0.7rem 1rem;
  color: var(--night);
  background: var(--amber);
  border-radius: 8px;
  font-weight: 800;
  transform: translateY(-200%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.section-shell {
  width: min(calc(100% - 3rem), var(--max-width));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 76px;
  padding: 0 5vw;
  background: var(--header-bg);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  transition: border-color 180ms ease, background 180ms ease;
}

.site-header.is-scrolled {
  background: var(--header-bg-solid);
  border-color: var(--line);
}

.brand {
  display: inline-flex;
  gap: 0.7rem;
  align-items: center;
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 900;
  letter-spacing: 0.18em;
}

.brand-mark {
  width: 28px;
  height: 31px;
  overflow: visible;
}

.brand-mark path:first-child {
  fill: var(--blue);
  stroke: none;
}

.brand-mark path:last-child {
  fill: none;
  stroke: white;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.site-nav {
  display: flex;
  gap: 2rem;
  align-items: center;
  color: var(--nav-text);
  font-size: 0.84rem;
  font-weight: 700;
}

.site-nav > a:not(.nav-cta) {
  transition: color 140ms ease;
}

.site-nav > a:not(.nav-cta):hover {
  color: var(--ink);
}

.theme-toggle {
  padding: 0;
  color: var(--nav-text);
  background: none;
  border: 0;
  font: inherit;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
}

.theme-toggle:hover {
  color: var(--ink);
}

.nav-cta {
  padding: 0.65rem 1rem;
  color: var(--ink);
  background: rgba(91, 140, 255, 0.1);
  border: 1px solid rgba(91, 140, 255, 0.5);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 12px 9px;
  background: none;
  border: 0;
}

.nav-toggle span:not(.sr-only) {
  display: block;
  width: 25px;
  height: 2px;
  margin: 6px 0;
  background: var(--ink);
  transition: transform 180ms ease;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(460px, 0.97fr);
  gap: 3rem;
  align-items: center;
  min-height: calc(100vh - 76px);
  padding-block: 5rem 7rem;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow {
  display: flex;
  gap: 0.65rem;
  align-items: center;
  margin: 0 0 1.25rem;
  color: var(--cyan-text);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.status-dot {
  width: 7px;
  height: 7px;
  background: var(--green);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(96, 211, 148, 0.1), 0 0 18px var(--green);
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.08;
}

h1 {
  max-width: 850px;
  margin-bottom: 1.5rem;
  font-size: clamp(3.4rem, 6.4vw, 6.8rem);
  font-weight: 680;
  letter-spacing: -0.065em;
}

h1 em {
  color: var(--amber-text);
  font-style: normal;
}

.hero-lede {
  max-width: 700px;
  margin: 0;
  color: var(--hero-text);
  font-size: clamp(1.08rem, 1.7vw, 1.3rem);
  line-height: 1.65;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 9px;
  font-size: 0.86rem;
  font-weight: 800;
  transition: transform 140ms ease, background 140ms ease, border-color 140ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #07101d;
  background: var(--amber);
}

.button-primary:hover {
  background: #ffc262;
}

.button-secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--line-strong);
}

.button-secondary:hover {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.45);
}

.evidence-stamp {
  display: flex;
  gap: 0.85rem;
  align-items: flex-start;
  max-width: 650px;
  padding-top: 1.5rem;
  margin-top: 2.2rem;
  border-top: 1px solid var(--line);
}

.evidence-stamp svg {
  flex: 0 0 26px;
  width: 26px;
  fill: none;
  stroke: var(--cyan);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.7;
}

.evidence-stamp p {
  margin: 0;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.6;
}

.evidence-stamp strong {
  color: var(--ink);
}

.hero-asset-card,
.architecture-figure {
  margin: 0;
  overflow: hidden;
  background: var(--image-frame);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-asset-card {
  transform: perspective(1200px) rotateY(-2deg);
}

.hero-asset-card img,
.architecture-figure img {
  display: block;
  width: 100%;
  height: auto;
}

.hero-asset-card figcaption,
.architecture-figure figcaption {
  padding: 0.75rem 1rem;
  color: var(--quiet);
  border-top: 1px solid var(--line);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(120px, 1fr)) minmax(220px, 1.35fr);
  width: min(calc(100% - 3rem), 1360px);
  margin: 0 auto;
  background: var(--proof-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.proof-item,
.proof-meta {
  min-height: 112px;
  padding: 1.3rem 1.4rem;
  border-right: 1px solid var(--line);
}

.proof-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.proof-item strong {
  color: var(--amber-text);
  font-size: 1.75rem;
  font-weight: 650;
  letter-spacing: -0.04em;
}

.proof-item span,
.proof-meta span {
  color: var(--quiet);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.proof-meta {
  display: flex;
  flex-direction: column;
  justify-content: center;
  border: 0;
}

.proof-meta time {
  margin-top: 0.35rem;
  color: var(--proof-time);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

/* How old the committed snapshot is. Secondary to the absolute UTC stamp above it, which stays
   authoritative — this only spares the reader the arithmetic. */
.proof-age {
  margin-top: 0.15rem;
  color: var(--quiet);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  text-transform: none;
}

.footer-build {
  display: block;
  margin-top: 0.55rem;
  max-width: 62ch;
  opacity: 0.78;
}

.section {
  padding-block: clamp(6rem, 10vw, 10rem);
}

.section-heading {
  max-width: 780px;
  margin-bottom: 3.3rem;
}

.section-heading h2,
.memory-copy h2,
.limits-layout h2,
.testing-section h2 {
  margin-bottom: 1rem;
  font-size: clamp(2.4rem, 4.5vw, 4.6rem);
  font-weight: 630;
  letter-spacing: -0.055em;
}

.section-heading > p:not(.eyebrow),
.split-heading > p,
.heading-lede,
.memory-copy > p:not(.eyebrow),
.limits-layout > div > p:not(.eyebrow) {
  color: var(--muted);
}

.split-heading {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 4rem;
  align-items: end;
  max-width: none;
}

.split-heading > p {
  padding-bottom: 0.7rem;
  margin: 0;
}

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

.agent-card {
  position: relative;
  min-height: 360px;
  padding: 1.6rem;
  overflow: hidden;
  background: linear-gradient(145deg, var(--panel-gradient-a), var(--panel-gradient-b));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.agent-card::before {
  position: absolute;
  right: -90px;
  bottom: -130px;
  width: 260px;
  aspect-ratio: 1;
  content: "";
  background: var(--blue);
  border-radius: 50%;
  filter: blur(110px);
  opacity: 0.11;
}

.agent-card-cyan::before { background: var(--cyan); }
.agent-card-amber::before { background: var(--amber); }

.agent-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4.8rem;
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.68rem;
}

.agent-state {
  padding: 0.25rem 0.45rem;
  color: var(--badge-blue-text);
  background: rgba(91, 140, 255, 0.08);
  border: 1px solid rgba(91, 140, 255, 0.24);
  border-radius: 4px;
}

.agent-card-cyan .agent-state {
  color: var(--badge-cyan-text);
  background: rgba(69, 211, 208, 0.08);
  border-color: rgba(69, 211, 208, 0.24);
}

.agent-card-amber .agent-state {
  color: var(--badge-amber-text);
  background: rgba(245, 173, 66, 0.08);
  border-color: rgba(245, 173, 66, 0.24);
}

.agent-card h3 {
  margin-bottom: 0.7rem;
  font-size: 1.55rem;
}

.agent-card > p {
  min-height: 78px;
  color: var(--muted);
  font-size: 0.92rem;
}

.capability-list {
  display: grid;
  gap: 0.55rem;
  padding: 1.2rem 0 0;
  margin: 1.3rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.capability-list li {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  color: var(--list-text);
  font-size: 0.78rem;
}

.capability-list li::before {
  width: 5px;
  height: 5px;
  content: "";
  background: var(--blue);
  border-radius: 50%;
}

.agent-card-cyan .capability-list li::before { background: var(--cyan); }
.agent-card-amber .capability-list li::before { background: var(--amber); }

.path-section {
  background: var(--path-bg);
  color: var(--path-ink);
}

.path-section .eyebrow { color: var(--cyan-text); }
.path-section .section-heading > .heading-lede { color: var(--path-muted); }

.architecture-figure {
  margin: 4rem 0 1.5rem;
}

.data-contract {
  display: grid;
  grid-template-columns: 1fr 90px 1fr;
  gap: 1.5rem;
  align-items: center;
  padding: 1.6rem;
  background: var(--contract-bg);
  border-radius: 12px;
}

.data-contract > div {
  padding: 1rem;
  background: var(--contract-panel);
  border-radius: 8px;
}

.contract-label {
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.contract-denied { color: var(--contract-denied); }
.contract-allowed { color: var(--contract-allowed); }

.data-contract p {
  margin: 0.4rem 0 0;
  color: var(--contract-text);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
}

.data-contract svg {
  width: 64px;
  justify-self: center;
  fill: none;
  stroke: #7e8b9e;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.memory-section {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 7rem;
  align-items: center;
}

.memory-copy > p:not(.eyebrow) {
  font-size: 1.05rem;
}

.honesty-note {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1rem 0;
  margin-top: 2rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  font-size: 0.78rem;
}

.honesty-note strong { color: var(--amber-text); }
.honesty-note span { color: var(--muted); }

.timeline-card {
  position: relative;
  padding: 3rem;
  background: linear-gradient(145deg, var(--panel-gradient-a), var(--panel-gradient-b));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.timeline-row {
  display: grid;
  grid-template-columns: 70px 34px 1fr;
  gap: 1rem;
  align-items: center;
}

.timeline-row time {
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.7rem;
}

.timeline-node {
  position: relative;
  z-index: 2;
  width: 18px;
  height: 18px;
  background: var(--panel);
  border: 4px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 0 5px rgba(91, 140, 255, 0.1);
}

.timeline-suppressed .timeline-node {
  border-color: var(--green);
  box-shadow: 0 0 0 5px rgba(96, 211, 148, 0.1);
}

.timeline-row strong,
.timeline-row small { display: block; }
.timeline-row strong { font-size: 0.92rem; }
.timeline-row small { color: var(--quiet); font-size: 0.72rem; }

.timeline-line {
  position: relative;
  height: 120px;
  margin-left: 87px;
  border-left: 1px dashed rgba(91, 140, 255, 0.5);
}

.timeline-line span {
  position: absolute;
  top: 50%;
  left: 18px;
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.65rem;
  transform: translateY(-50%);
}

.controls-section {
  background: var(--controls-bg);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.pillar-grid article {
  min-height: 190px;
  padding: 1.4rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.pillar-grid article:nth-child(5) { grid-column: 1 / 2; }

.pillar-grid span {
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.66rem;
}

.pillar-grid h3 {
  margin: 3rem 0 0.5rem;
  font-size: 1rem;
}

.pillar-grid p {
  margin: 0;
  color: var(--quiet);
  font-size: 0.75rem;
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  min-height: 340px;
}

.evidence-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 330px;
  padding: 1.35rem;
  overflow: hidden;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.evidence-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  content: "";
  background: var(--card-accent, var(--blue));
}

.evidence-kicker {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 4rem;
  color: var(--quiet);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.evidence-state {
  padding: 0.22rem 0.4rem;
  color: var(--state-amber-text);
  background: rgba(245, 173, 66, 0.08);
  border: 1px solid rgba(245, 173, 66, 0.28);
  border-radius: 3px;
}

.evidence-card h3 {
  margin-bottom: 0.7rem;
  font-size: 1.25rem;
}

.evidence-card p {
  margin: 0 0 1.3rem;
  color: var(--muted);
  font-size: 0.82rem;
}

.evidence-link {
  display: inline-flex;
  gap: 0.35rem;
  align-items: center;
  margin-top: auto;
  color: var(--link-text);
  font-size: 0.75rem;
  font-weight: 800;
}

.evidence-link:hover { color: var(--ink); }

.evidence-empty,
.evidence-error {
  grid-column: 1 / -1;
  align-items: center;
  justify-content: center;
  min-height: 260px;
  text-align: center;
}

.skeleton {
  background: linear-gradient(90deg, #15243a 25%, #1a2c46 50%, #15243a 75%);
  background-size: 200% 100%;
  border-radius: 6px;
  animation: shimmer 1.5s infinite linear;
}

.skeleton-image { height: 150px; margin-bottom: 2rem; }
.skeleton-line { height: 14px; margin-bottom: 0.8rem; }
.skeleton-short { width: 60%; }

@keyframes shimmer {
  to { background-position: -200% 0; }
}

.video-panel {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  min-height: 360px;
  margin-top: 1rem;
  overflow: hidden;
  background: var(--panel-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.video-placeholder {
  display: grid;
  min-height: 360px;
  place-items: center;
  background:
    linear-gradient(rgba(8, 17, 31, 0.44), rgba(8, 17, 31, 0.75)),
    repeating-linear-gradient(45deg, #193052 0 1px, #0d1b30 1px 18px);
}

.video-placeholder svg {
  width: 74px;
  fill: rgba(255, 255, 255, 0.04);
  stroke: rgba(255, 255, 255, 0.4);
  stroke-width: 1.4;
}

.video-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem;
}

.status-label {
  margin-bottom: 1.4rem;
  color: var(--amber-text);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.65rem;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.video-copy h3 {
  margin-bottom: 1rem;
  font-size: 2rem;
  letter-spacing: -0.04em;
}

.video-copy p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.video-embed {
  width: 100%;
  height: 100%;
  min-height: 360px;
  border: 0;
}

.limits-section {
  color: #0b1727;
  background: var(--amber);
}

.limits-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 7rem;
}

.limits-layout .eyebrow { color: #563300; }
.limits-layout > div > p:not(.eyebrow) { color: #4d3a1c; }

.limits-list {
  padding: 0;
  margin: 0;
  list-style: none;
  border-top: 1px solid rgba(41, 29, 10, 0.3);
}

.limits-list li {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 1.5rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid rgba(41, 29, 10, 0.3);
}

.limits-list strong { font-size: 0.85rem; }
.limits-list span { color: #5f471f; font-size: 0.8rem; }

.testing-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: end;
}

.testing-section h2 { margin-bottom: 0; }
.testing-actions > p { color: var(--muted); }

.testing-actions > div {
  display: flex;
  flex-wrap: wrap;
  gap: 1.3rem;
  align-items: center;
  margin-top: 1.8rem;
}

.text-link {
  color: var(--link-text);
  font-size: 0.82rem;
  font-weight: 800;
}

.text-link:hover { color: var(--ink); }

.site-footer {
  padding-block: 4rem;
  background: var(--night-deep);
  border-top: 1px solid var(--line);
}

.footer-layout {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: start;
}

.footer-brand { margin-bottom: 1rem; }
.footer-layout > div > p { margin: 0; color: var(--quiet); font-size: 0.78rem; }

.footer-links {
  display: flex;
  gap: 1.4rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
}

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

.footer-note {
  grid-column: 1 / -1;
  padding-top: 1.5rem;
  margin: 0;
  color: var(--footer-note);
  border-top: 1px solid var(--line);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.62rem;
  letter-spacing: 0.05em;
}

.error-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 1.5rem;
}

.error-card {
  width: min(100%, 660px);
  padding: clamp(2rem, 7vw, 5rem);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.error-code {
  margin: 5rem 0 0.5rem;
  color: var(--amber-text);
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 0.78rem;
  font-weight: 900;
}

.error-card h1 {
  margin-bottom: 1rem;
  font-size: clamp(2.4rem, 8vw, 4.6rem);
}

.error-card > p:not(.error-code) { color: var(--muted); }
.error-card .button { margin-top: 1.5rem; }

@media (max-width: 1080px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 7rem;
  }

  .proof-strip { grid-template-columns: repeat(4, 1fr); }
  .proof-meta { grid-column: 1 / -1; min-height: 78px; border-top: 1px solid var(--line); }
  .proof-item:nth-child(4) { border-right: 0; }
  .agent-card > p { min-height: 110px; }
  .pillar-grid { grid-template-columns: repeat(3, 1fr); }
  .pillar-grid article:nth-child(5) { grid-column: auto; }
}

@media (max-width: 780px) {
  .section-shell { width: min(calc(100% - 2rem), var(--max-width)); }
  .site-header { min-height: 66px; padding: 0 1rem; }
  .nav-toggle { display: block; }
  .nav-toggle[aria-expanded="true"] span:nth-of-type(2) { transform: translateY(4px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-of-type(3) { transform: translateY(-4px) rotate(-45deg); }
  .site-nav {
    position: absolute;
    top: 66px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    padding: 1rem;
    background: var(--header-bg-solid);
    border-bottom: 1px solid var(--line);
  }
  .site-nav.is-open { display: grid; gap: 0; }
  .site-nav a,
  .theme-toggle { padding: 0.9rem; text-align: left; }
  .nav-cta { border-radius: 8px; }
  .hero { min-height: auto; padding-block: 5rem; }
  h1 { font-size: clamp(3rem, 15vw, 5.2rem); }
  .hero-asset-card { transform: none; }
  .proof-strip { grid-template-columns: repeat(2, 1fr); width: calc(100% - 2rem); }
  .proof-item:nth-child(2) { border-right: 0; }
  .proof-item:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .split-heading,
  .memory-section,
  .limits-layout,
  .testing-section { grid-template-columns: 1fr; gap: 2.5rem; }
  .agent-grid,
  .evidence-grid { grid-template-columns: 1fr; }
  .agent-card { min-height: auto; }
  .agent-card-top { margin-bottom: 3rem; }
  .agent-card > p { min-height: auto; }
  .data-contract { grid-template-columns: 1fr; }
  .data-contract svg { transform: rotate(90deg); }
  .timeline-card { padding: 1.6rem 1rem; }
  .pillar-grid { grid-template-columns: repeat(2, 1fr); }
  .video-panel { grid-template-columns: 1fr; }
  .video-copy { padding: 2rem; }
  .footer-layout { grid-template-columns: 1fr; }
  .footer-links { flex-wrap: wrap; }
  .footer-note { grid-column: 1; }
}

@media (max-width: 480px) {
  .proof-strip { grid-template-columns: 1fr; }
  .proof-item { min-height: 92px; border-right: 0; border-bottom: 1px solid var(--line); }
  .proof-item:nth-child(3) { border-bottom: 1px solid var(--line); }
  .pillar-grid { grid-template-columns: 1fr; }
  .limits-list li { grid-template-columns: 1fr; gap: 0.35rem; }
  .timeline-row { grid-template-columns: 58px 25px 1fr; gap: 0.55rem; }
  .timeline-line { margin-left: 70px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}