:root {
  --page: #090912;
  --ink: #f4f1ff;
  --sub: #b8b2cb;
  --muted: #817c98;
  --line: #272235;
  --panel: #11101a;
  --panel-2: #161421;
  --panel-3: #1c1828;
  --lavender: #b8adf1;
  --cyan: #2fd3d0;
  --green: #7bd99d;
  --amber: #dfad64;
  --rose: #ea8295;
  --violet: #8d7cf2;
  --wordmark: "Syne", "Space Grotesk", system-ui, sans-serif;
  --display: "Space Grotesk", "Inter", system-ui, sans-serif;
  --body: "Inter", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    linear-gradient(180deg, rgba(184, 173, 241, 0.08), rgba(9, 9, 18, 0) 420px),
    radial-gradient(circle at 50% -160px, rgba(47, 211, 208, 0.12), transparent 420px),
    var(--page);
  color: var(--ink);
  font-family: var(--body);
  font-weight: 300;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

button {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 22px;
  align-items: center;
  padding: 16px max(24px, calc((100vw - 1220px) / 2));
  background: rgba(9, 9, 18, 0.86);
  border-bottom: 1px solid rgba(39, 34, 53, 0.92);
  backdrop-filter: blur(18px);
}

.brand-lockup {
  --brand-scale: 1;
  display: inline-flex;
  flex-direction: column;
  width: max-content;
  line-height: 1;
}

.logo-main {
  font-family: var(--wordmark);
  font-size: calc(1.55rem * var(--brand-scale));
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  padding-bottom: calc(7px * var(--brand-scale));
  border-bottom: 1px solid #4e4b68;
  white-space: nowrap;
}

.logo-main span {
  color: var(--lavender);
}

.logo-sub {
  display: flex;
  justify-content: space-between;
  margin-top: calc(0.55rem * var(--brand-scale));
  color: var(--lavender);
  font-family: var(--mono);
  font-size: calc(0.58rem * var(--brand-scale));
  letter-spacing: 0;
  text-transform: uppercase;
  white-space: nowrap;
}

.logo-sub span {
  display: inline-block;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: 18px;
  min-width: 0;
  color: var(--sub);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav a,
.lang-btn {
  transition: color 160ms ease, border-color 160ms ease, background 160ms ease;
}

.site-nav a:hover,
.lang-btn:hover {
  color: var(--ink);
}

.language-switcher {
  display: flex;
  gap: 6px;
}

.lang-btn {
  min-width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--mono);
  font-size: 11px;
}

.lang-btn.active {
  color: var(--ink);
  border-color: #4e4b68;
  background: rgba(184, 173, 241, 0.07);
}

.section,
.section-band {
  max-width: 1220px;
  margin: 0 auto;
  padding: 96px 24px;
}

.section + .section,
.section + .section-band,
.section-band + .section {
  border-top: 1px solid var(--line);
}

.section-band {
  min-height: 780px;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1fr);
  gap: 58px;
  align-items: center;
}

.hero-copy,
.hero-visual,
.section-head,
.section-kicker,
.definition-copy,
.line-card,
.triad-card,
.metric-card,
.archive-card,
.teaser-card,
.contact-card,
.email-template,
.commercial-grid article {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: var(--display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

h1 {
  max-width: 13.5ch;
  font-size: clamp(48px, 7vw, 86px);
}

h2 {
  max-width: 16ch;
  font-size: clamp(34px, 4.6vw, 58px);
}

h3 {
  font-size: 21px;
  line-height: 1.22;
}

p {
  overflow-wrap: break-word;
}

.hero-lead,
.definition-copy > p,
.section-head p,
.contact-card p {
  color: var(--sub);
  font-size: 17px;
}

.hero-lead {
  max-width: 68ch;
  margin: 28px 0 0;
}

.hero-actions,
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.contact-links {
  gap: 20px;
}

.contact-link {
  color: var(--ink);
  border-bottom: 1px solid rgba(184, 173, 241, 0.42);
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  text-transform: none;
  padding-bottom: 4px;
}

.contact-link:hover {
  color: var(--lavender);
  border-color: var(--lavender);
}

.btn {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid #4e4b68;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  padding: 0 17px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.btn.primary {
  border-color: var(--lavender);
  background: var(--lavender);
  color: #11101a;
  font-weight: 600;
}

.btn.secondary:hover,
.btn.ghost:hover {
  border-color: var(--lavender);
}

.btn.ghost {
  color: var(--sub);
}

.hero-visual {
  position: relative;
  overflow: hidden;
  min-height: 560px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(184, 173, 241, 0.08), rgba(17, 16, 26, 0.94)),
    var(--panel);
}

.hero-system {
  display: grid;
  align-items: center;
  padding: 24px;
}

.system-field {
  position: relative;
  height: 470px;
  overflow: hidden;
  border: 1px solid rgba(78, 75, 104, 0.62);
  border-radius: 8px;
  background:
    linear-gradient(rgba(78, 75, 104, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(78, 75, 104, 0.18) 1px, transparent 1px),
    radial-gradient(circle at 50% 46%, rgba(184, 173, 241, 0.20), transparent 34%),
    radial-gradient(circle at 22% 28%, rgba(47, 211, 208, 0.12), transparent 26%),
    radial-gradient(circle at 78% 64%, rgba(223, 173, 100, 0.10), transparent 28%),
    #0c0b14;
  background-size: 100% 100%, 56px 56px, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
}

.field-ring {
  position: absolute;
  left: 50%;
  top: 48%;
  border: 1px solid rgba(184, 173, 241, 0.34);
  border-radius: 45% 55% 52% 48%;
  transform: translate(-50%, -50%) rotate(var(--r, 0deg));
  animation: fieldRotate 18s linear infinite;
}

.ring-one {
  --r: 8deg;
  width: 420px;
  height: 250px;
}

.ring-two {
  --r: -24deg;
  width: 330px;
  height: 330px;
  border-color: rgba(47, 211, 208, 0.26);
  animation-duration: 24s;
  animation-direction: reverse;
}

.ring-three {
  --r: 44deg;
  width: 220px;
  height: 145px;
  border-color: rgba(223, 173, 100, 0.32);
  animation-duration: 14s;
}

@keyframes fieldRotate {
  from { transform: translate(-50%, -50%) rotate(var(--r, 0deg)); }
  to { transform: translate(-50%, -50%) rotate(calc(var(--r, 0deg) + 360deg)); }
}

.core-node,
.system-node,
.system-signal {
  position: absolute;
  border: 1px solid rgba(78, 75, 104, 0.82);
  background: rgba(17, 16, 26, 0.88);
  backdrop-filter: blur(10px);
}

.core-node {
  left: 50%;
  top: 48%;
  width: 142px;
  height: 142px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border-color: rgba(184, 173, 241, 0.82);
  box-shadow:
    0 0 0 1px rgba(184, 173, 241, 0.10),
    0 0 56px rgba(184, 173, 241, 0.26);
  color: var(--ink);
  font-family: var(--display);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.08;
  text-align: center;
  transform: translate(-50%, -50%);
}

.core-node::before,
.core-node::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--lavender);
  box-shadow: 0 0 26px rgba(184, 173, 241, 0.90);
  transform: translate(-50%, -50%);
  animation: corePulse 2.6s ease-in-out infinite;
}

.core-node::after {
  width: 186px;
  height: 186px;
  background: transparent;
  border: 1px solid rgba(184, 173, 241, 0.18);
  box-shadow: none;
  animation-duration: 3.8s;
}

@keyframes corePulse {
  0%, 100% { opacity: 0.44; transform: translate(-50%, -50%) scale(0.88); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.08); }
}

.system-node {
  width: 178px;
  min-height: 104px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
  padding: 18px;
  border-radius: 8px;
}

.system-node::before {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  pointer-events: none;
}

.system-node span {
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.system-node strong {
  color: var(--ink);
  font-family: var(--display);
  font-size: 18px;
  line-height: 1.12;
}

.slnn-node {
  left: 42px;
  top: 54px;
  border-color: rgba(47, 211, 208, 0.56);
  box-shadow: 0 0 46px rgba(47, 211, 208, 0.13);
}

.nd-node {
  right: 52px;
  top: 66px;
  border-color: rgba(223, 173, 100, 0.55);
  box-shadow: 0 0 46px rgba(223, 173, 100, 0.12);
}

.hrr-node {
  right: 82px;
  bottom: 76px;
  border-color: rgba(123, 217, 157, 0.52);
  box-shadow: 0 0 46px rgba(123, 217, 157, 0.10);
}

.system-node::after {
  content: "";
  position: absolute;
  width: 128px;
  height: 1px;
  top: 50%;
  background: linear-gradient(90deg, rgba(184, 173, 241, 0.10), rgba(184, 173, 241, 0.72), rgba(184, 173, 241, 0.10));
}

.slnn-node::after {
  left: 100%;
  transform: rotate(18deg);
  transform-origin: left center;
}

.nd-node::after {
  right: 100%;
  transform: rotate(-16deg);
  transform-origin: right center;
}

.hrr-node::after {
  right: 100%;
  transform: rotate(20deg);
  transform-origin: right center;
}

.system-signal {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 15px;
  color: var(--sub);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.signal-in {
  left: 38px;
  bottom: 58px;
  border-color: rgba(234, 130, 149, 0.52);
}

.signal-out {
  right: 42px;
  top: 214px;
  border-color: rgba(184, 173, 241, 0.62);
}

.hero-metrics {
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.hero-metrics div {
  min-height: 68px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  padding: 0 14px;
  background: rgba(17, 16, 26, 0.94);
}

.hero-metrics span {
  color: var(--muted);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-metrics strong {
  font-family: var(--display);
  font-size: 26px;
  line-height: 1;
}

.product-definition,
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(340px, 0.72fr);
  gap: 44px;
  align-items: start;
}

.section-head {
  margin-bottom: 36px;
}

.section-head .eyebrow,
.section-head h2 {
  grid-column: 1;
}

.section-head p {
  grid-column: 2;
  grid-row: 1 / span 2;
  margin: 0;
  max-width: 70ch;
}

.definition-copy > p {
  margin: 0 0 30px;
}

.loop-diagram {
  display: grid;
  grid-template-columns: minmax(120px, 1fr) 28px minmax(120px, 1fr) 28px minmax(120px, 1fr);
  grid-template-rows: auto 52px auto;
  gap: 12px 8px;
  align-items: center;
}

.loop-node {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.35;
  text-align: center;
  text-transform: uppercase;
}

.loop-node.accent {
  border-color: rgba(223, 173, 100, 0.58);
  color: var(--amber);
}

.loop-node.core {
  grid-column: 3;
  grid-row: 3;
  border-color: rgba(184, 173, 241, 0.66);
  background: linear-gradient(135deg, rgba(184, 173, 241, 0.20), rgba(47, 211, 208, 0.08));
  font-size: 14px;
  color: var(--ink);
}

.loop-arrow {
  height: 1px;
  background: linear-gradient(90deg, var(--line), var(--lavender));
}

.loop-arrow::after {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  margin-left: auto;
  transform: translateY(-3px) rotate(45deg);
  border-top: 1px solid var(--lavender);
  border-right: 1px solid var(--lavender);
}

.loop-return {
  grid-column: 3 / span 3;
  grid-row: 2;
  align-self: end;
  padding-top: 18px;
  border-top: 1px dashed rgba(184, 173, 241, 0.46);
  color: var(--sub);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-align: center;
  text-transform: uppercase;
}

.loop-arrow.tight {
  grid-column: 5;
  grid-row: 2;
  width: 1px;
  height: 46px;
  justify-self: center;
  background: linear-gradient(180deg, var(--amber), transparent);
}

.loop-arrow.tight::after {
  display: none;
}

.triad-grid,
.line-grid,
.evidence-grid,
.archive-grid,
.teaser-grid,
.commercial-grid {
  display: grid;
  gap: 14px;
}

.triad-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.triad-card,
.line-card,
.metric-card,
.archive-card,
.teaser-card,
.commercial-grid article,
.email-template,
.contact-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.triad-card {
  min-height: 420px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.card-code,
.commercial-grid span,
.template-top span {
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.triad-card p,
.line-card p,
.teaser-card p,
.archive-card p,
.metric-card p,
.commercial-grid p {
  margin: 0;
  color: var(--sub);
  font-size: 14px;
}

.triad-art {
  position: relative;
  min-height: 150px;
  overflow: hidden;
  border: 1px solid rgba(78, 75, 104, 0.7);
  border-radius: 8px;
  background: #0c0b14;
}

.slnn-art {
  background:
    linear-gradient(90deg, rgba(47, 211, 208, 0.08), transparent),
    #0c0b14;
}

.slnn-art span {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px rgba(47, 211, 208, 0.85);
  animation: pulse 2.8s infinite ease-in-out;
}

.slnn-art span:nth-child(1) { left: 18%; top: 28%; animation-delay: 0s; }
.slnn-art span:nth-child(2) { left: 38%; top: 64%; animation-delay: 0.35s; }
.slnn-art span:nth-child(3) { left: 56%; top: 34%; animation-delay: 0.7s; }
.slnn-art span:nth-child(4) { left: 74%; top: 58%; animation-delay: 1.05s; }
.slnn-art span:nth-child(5) { left: 84%; top: 22%; animation-delay: 1.4s; }

.slnn-art::before,
.slnn-art::after {
  content: "";
  position: absolute;
  inset: 28px 18px;
  border-top: 1px solid rgba(184, 173, 241, 0.28);
  border-bottom: 1px solid rgba(47, 211, 208, 0.22);
  transform: skewY(-12deg);
}

.fractal-art {
  background:
    linear-gradient(135deg, rgba(223, 173, 100, 0.10), rgba(184, 173, 241, 0.05)),
    #0c0b14;
}

.fractal-art span {
  position: absolute;
  border: 1px solid rgba(223, 173, 100, 0.72);
  border-radius: 50%;
  transform-origin: center;
}

.fractal-art span:nth-child(1) { width: 114px; height: 86px; left: 20%; top: 22%; transform: rotate(18deg); }
.fractal-art span:nth-child(2) { width: 72px; height: 54px; left: 45%; top: 38%; transform: rotate(-26deg); }
.fractal-art span:nth-child(3) { width: 42px; height: 32px; left: 61%; top: 24%; transform: rotate(41deg); }
.fractal-art span:nth-child(4) { width: 28px; height: 22px; left: 70%; top: 56%; transform: rotate(-12deg); }

.fractal-art::after {
  content: "";
  position: absolute;
  left: 16%;
  right: 13%;
  top: 52%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber), var(--lavender), transparent);
}

.hrr-art {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  padding: 18px;
  background:
    linear-gradient(135deg, rgba(123, 217, 157, 0.08), rgba(234, 130, 149, 0.08)),
    #0c0b14;
}

.hrr-art span {
  display: block;
  border-radius: 6px;
  background: rgba(184, 173, 241, 0.14);
  min-height: 112px;
}

.hrr-art span:nth-child(1) { background: rgba(47, 211, 208, 0.24); }
.hrr-art span:nth-child(2) { background: rgba(184, 173, 241, 0.36); }
.hrr-art span:nth-child(3) { background: rgba(123, 217, 157, 0.28); }
.hrr-art span:nth-child(4) { background: rgba(223, 173, 100, 0.26); }
.hrr-art span:nth-child(5) { background: rgba(234, 130, 149, 0.26); }

@keyframes pulse {
  0%, 100% { transform: scale(0.7); opacity: 0.48; }
  48% { transform: scale(1.55); opacity: 1; }
}

.line-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.line-card {
  min-height: 300px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.line-card.primary-line {
  min-height: 360px;
  background:
    linear-gradient(135deg, rgba(184, 173, 241, 0.10), rgba(17, 16, 26, 0.96)),
    var(--panel);
}

.line-card a,
.teaser-card strong,
.archive-card strong {
  margin-top: auto;
  color: var(--cyan);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.start-section {
  max-width: none;
  background: rgba(17, 16, 26, 0.38);
}

.start-section > * {
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
}

.start-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(360px, 0.82fr);
  gap: 18px;
}

.email-template {
  overflow: hidden;
}

.template-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
  background: var(--panel-2);
}

.copy-template {
  height: 32px;
  border: 1px solid #4e4b68;
  background: transparent;
  color: var(--sub);
  cursor: pointer;
  padding: 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.email-template pre {
  margin: 0;
  padding: 22px;
  color: #dcd7ef;
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.72;
  white-space: pre-wrap;
}

.signal-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.signal-list article {
  min-height: 164px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px;
  background: var(--panel);
}

.signal-list span {
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.signal-list strong {
  color: var(--ink);
  font-family: var(--display);
  font-size: 20px;
  line-height: 1.12;
}

.signal-list p {
  margin: 0;
  color: var(--sub);
  font-size: 14px;
}

.email-template pre.file-example {
  border-top: 1px solid var(--line);
  background: #0c0b14;
}

.data-note {
  margin: 0;
  padding: 18px 22px;
  border-top: 1px solid var(--line);
  color: var(--sub);
  background: var(--panel-2);
  font-size: 14px;
}

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

.commercial-grid article {
  min-height: 122px;
  padding: 20px;
}

.commercial-grid strong {
  display: block;
  margin: 10px 0 8px;
  font-family: var(--display);
  font-size: 25px;
  line-height: 1;
}

.teaser-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.teaser-card {
  min-height: 290px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(47, 211, 208, 0.04), rgba(17, 16, 26, 0)),
    var(--panel);
}

.teaser-card.featured {
  grid-column: span 2;
  min-height: 320px;
  background:
    linear-gradient(135deg, rgba(47, 211, 208, 0.11), rgba(184, 173, 241, 0.07)),
    var(--panel);
}

.teaser-card:hover,
.line-card:hover,
.archive-card:hover,
.metric-card:hover {
  border-color: #4e4b68;
}

.evidence-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.metric-card {
  min-height: 238px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 22px;
}

.metric-card div:first-child {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
}

.metric-card span {
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.metric-card strong {
  font-family: var(--display);
  font-size: 29px;
  line-height: 1;
}

.bar-pair {
  display: grid;
  gap: 6px;
  margin-top: auto;
}

.bar-pair span {
  width: var(--w);
  height: 8px;
  border-radius: 999px;
}

.bar-pair span:first-child {
  background: rgba(129, 124, 152, 0.58);
}

.bar-pair span:last-child {
  background: linear-gradient(90deg, var(--cyan), var(--lavender));
}

.archive-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.archive-card {
  min-height: 292px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.sentinel-section {
  max-width: none;
  background: linear-gradient(180deg, rgba(47, 211, 208, 0.045), rgba(17, 16, 26, 0.16));
}

.sentinel-section > * {
  max-width: 1220px;
  margin-left: auto;
  margin-right: auto;
}

.sentinel-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.58fr);
  gap: 18px;
  align-items: stretch;
}

.sentinel-offer,
.sentinel-summary,
.sentinel-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.sentinel-offer {
  display: grid;
  gap: 18px;
  padding: 24px;
}

.sentinel-offer article {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.sentinel-offer article:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.sentinel-offer span,
.sentinel-card em {
  color: var(--lavender);
  font-family: var(--mono);
  font-size: 12px;
  font-style: normal;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.sentinel-offer strong,
.sentinel-summary h3 {
  display: block;
  margin: 8px 0 10px;
  color: var(--ink);
  font-family: var(--display);
  font-size: 26px;
  line-height: 1.12;
}

.sentinel-offer p,
.sentinel-summary p,
.sentinel-card p {
  margin: 0;
}

.sentinel-summary {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 26px;
  background:
    linear-gradient(135deg, rgba(123, 217, 157, 0.08), rgba(47, 211, 208, 0.045)),
    var(--panel);
}

.sentinel-note {
  margin-top: 22px !important;
  color: var(--muted);
  font-size: 13px;
}

.sentinel-demo-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 18px;
}

.sentinel-card {
  min-height: 318px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 22px;
  background:
    linear-gradient(180deg, rgba(223, 173, 100, 0.055), rgba(17, 16, 26, 0)),
    var(--panel);
}

.sentinel-card:hover {
  border-color: rgba(47, 211, 208, 0.5);
}

.sentinel-metric {
  margin-top: auto;
  color: var(--green);
  font-family: var(--display);
  font-size: 32px;
  line-height: 1;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 0.68fr);
  gap: 42px;
  align-items: start;
}

.contact-card {
  padding: 26px;
}

.contact-card .founder-note {
  margin-top: 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

.site-footer {
  max-width: 1220px;
  margin: 0 auto;
  padding: 34px 24px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: none;
}

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

@media (max-width: 1100px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    grid-column: 1 / -1;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .section-band,
  .product-definition,
  .section-head,
  .start-layout,
  .sentinel-layout,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .section-head p {
    grid-column: auto;
    grid-row: auto;
  }

  .triad-grid,
  .line-grid,
  .evidence-grid,
  .archive-grid,
  .sentinel-demo-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .teaser-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .teaser-card.featured {
    grid-column: span 1;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 14px 16px;
    gap: 13px;
  }

  .site-nav {
    display: grid;
    grid-template-columns: repeat(4, max-content);
    justify-content: start;
    gap: 10px 16px;
    overflow-x: visible;
    font-size: 10px;
  }

  .site-nav a {
    white-space: nowrap;
  }

  .brand-lockup {
    --brand-scale: 0.82;
  }

  .section,
  .section-band {
    padding: 68px 16px;
  }

  h1 {
    max-width: 11ch;
    font-size: clamp(38px, 10.8vw, 46px);
  }

  .hero-copy,
  .hero-lead {
    width: 100%;
    max-width: min(34ch, calc(100vw - 32px));
  }

  .hero-lead,
  .definition-copy > p,
  .section-head p,
  .contact-card p {
    font-size: 15px;
  }

  .hero-actions,
  .contact-links,
  .site-footer {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .hero-visual {
    min-height: 0;
  }

  .hero-system {
    width: min(100%, calc(100vw - 32px));
    max-width: calc(100vw - 32px);
    padding: 14px;
  }

  .system-field {
    width: 100%;
    max-width: 100%;
    min-height: 0;
    height: auto;
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 14px;
  }

  .ring-one {
    width: 320px;
    height: 210px;
  }

  .ring-two {
    width: 248px;
    height: 248px;
  }

  .ring-three {
    width: 170px;
    height: 112px;
  }

  .core-node {
    position: relative;
    left: auto;
    top: auto;
    order: 3;
    width: 112px;
    height: 112px;
    font-size: 17px;
    align-self: center;
    transform: none;
  }

  .system-node {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    width: 118px;
    min-height: 82px;
    padding: 12px;
  }

  .system-node span {
    font-size: 10px;
  }

  .system-node strong {
    font-size: 13px;
  }

  .slnn-node {
    order: 2;
    width: 100%;
  }

  .nd-node {
    order: 4;
    width: 100%;
  }

  .hrr-node {
    order: 5;
    width: 100%;
  }

  .system-node::after {
    display: none;
  }

  .signal-in {
    position: relative;
    left: auto;
    bottom: auto;
    order: 1;
    width: 100%;
  }

  .signal-out {
    position: relative;
    right: auto;
    top: auto;
    order: 6;
    width: 100%;
  }

  .hero-metrics {
    position: static;
    margin-top: 12px;
  }

  .hero-metrics,
  .triad-grid,
  .line-grid,
  .evidence-grid,
  .archive-grid,
  .sentinel-demo-grid,
  .teaser-grid,
  .commercial-grid,
  .signal-list {
    grid-template-columns: 1fr;
  }

  .hero-metrics {
    left: 12px;
    right: 12px;
    bottom: 12px;
  }

  .hero-metrics div {
    min-height: 58px;
  }

  .loop-diagram {
    grid-template-columns: 1fr;
    grid-template-rows: none;
  }

  .loop-node,
  .loop-node.core,
  .loop-return,
  .loop-arrow,
  .loop-arrow.tight {
    grid-column: auto;
    grid-row: auto;
  }

  .loop-arrow {
    width: 1px;
    height: 28px;
    justify-self: center;
    background: linear-gradient(180deg, var(--line), var(--lavender));
  }

  .loop-arrow::after {
    display: none;
  }

  .loop-return {
    padding-top: 12px;
    border-top: 1px dashed rgba(184, 173, 241, 0.46);
  }

  .metric-card div:first-child {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}