/* AtomSift / Design System */
:root {
  --obsidian: #080B0F;
  --graphite: #151A20;
  --surface: #1D242B;
  --signal: #B7F34A;
  --cyan: #55E6D1;
  --white: #F4F7F2;
  --gray: #8A949D;
  --deep: #050709;
  --border: rgba(244, 247, 242, 0.08);
  --border-strong: rgba(244, 247, 242, 0.14);
  --font-display: "Space Grotesk", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --max: 1180px;
  --max-wide: 1320px;
}

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

html {
  scroll-behavior: smooth;
  background: var(--deep);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body {
  background: var(--obsidian);
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
ul { list-style: none; }

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}
a:focus:not(:focus-visible),
button:focus:not(:focus-visible) { outline: none; }

.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: absolute; left: 1rem; top: -100px; z-index: 9999;
  background: var(--signal); color: var(--obsidian); padding: 0.75rem 1rem;
  font-weight: 600; border-radius: 4px;
}
.skip-link:focus { top: 1rem; }

.mono { font-family: var(--font-mono); letter-spacing: 0.02em; }
.container { width: min(100% - 2.5rem, var(--max)); margin-inline: auto; }
.container.wide { width: min(100% - 2rem, var(--max-wide)); }

/* // Typography // */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

h1 { font-size: clamp(2.6rem, 6.5vw, 5.25rem); }
h2 { font-size: clamp(2rem, 4.2vw, 3.5rem); margin-bottom: 1.25rem; }
h3 { font-size: 1.25rem; letter-spacing: -0.02em; }

.eyebrow, .section-index {
  color: var(--cyan);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 1.25rem;
}

.section-lead {
  max-width: 38rem;
  color: var(--gray);
  font-size: 1.1rem;
  margin-bottom: 3rem;
}
.section-lead.light { color: rgba(244,247,242,0.55); }

.statement {
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  color: rgba(244,247,242,0.72);
  max-width: 36rem;
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.section-footer-note {
  margin-top: 2rem;
  color: var(--gray);
  font-size: 1.05rem;
  max-width: 32rem;
}

.disclaimer {
  margin-top: 1.5rem;
  font-size: 0.7rem;
  color: var(--gray);
  opacity: 0.75;
}

.label { color: var(--gray); font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; display: block; }
.value { color: var(--white); font-size: 1.15rem; }

.signal-word {
  color: var(--signal);
  position: relative;
}

/* // Buttons // */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.35rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: background 0.25s var(--ease), color 0.25s, border-color 0.25s, transform 0.25s var(--ease);
}

.btn-primary {
  background: var(--signal);
  color: var(--obsidian);
}
.btn-primary:hover { background: #c8ff6a; transform: translateY(-1px); }

.btn-ghost {
  border-color: var(--border-strong);
  color: var(--white);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--cyan); color: var(--cyan); }

.btn-nav {
  padding: 0.55rem 1rem;
  font-size: 0.85rem;
  background: transparent;
  border: 1px solid var(--border-strong);
  color: var(--white);
}
.btn-nav:hover { border-color: var(--signal); color: var(--signal); }

/* // Header // */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.35s, backdrop-filter 0.35s, border-color 0.35s;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(8, 11, 15, 0.72);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}

.nav-inner {
  width: min(100% - 2rem, var(--max-wide));
  margin-inline: auto;
  height: 100%;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  justify-self: start;
}

.brand-mark { width: 36px; height: 36px; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.03em;
}

.nav-center {
  display: flex;
  gap: 1.75rem;
  justify-content: center;
}

.nav-center a {
  font-size: 0.875rem;
  color: var(--gray);
  transition: color 0.2s;
}
.nav-center a:hover { color: var(--white); }

.btn-nav { justify-self: end; }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  justify-self: end;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  padding: 8px;
}
.nav-toggle span {
  display: block; height: 1.5px; background: var(--white);
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle[aria-expanded="true"] span:first-child { transform: translateY(3.75px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:last-child { transform: translateY(-3.75px) rotate(-45deg); }

.nav-mobile {
  display: none;
  flex-direction: column;
  gap: 0.25rem;
  padding: 1rem 1.25rem 1.5rem;
  background: rgba(8,11,15,0.95);
  border-bottom: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }
.nav-mobile a {
  padding: 0.85rem 0.5rem;
  color: var(--gray);
  border-bottom: 1px solid var(--border);
}
.nav-mobile .btn { margin-top: 0.75rem; justify-content: center; border-bottom: none; }

/* // Sections // */
.section {
  padding: clamp(5rem, 10vw, 8.5rem) 0;
  position: relative;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
[data-reveal].visible {
  opacity: 1;
  transform: none;
}

/* // Hero // */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  padding: calc(var(--header-h) + 2rem) 0 2rem;
  display: flex;
  flex-direction: column;
  position: relative;
  background:
    radial-gradient(ellipse 80% 50% at 70% 40%, rgba(85,230,209,0.06), transparent 55%),
    radial-gradient(ellipse 50% 40% at 20% 80%, rgba(183,243,74,0.04), transparent 50%),
    var(--obsidian);
  overflow: hidden;
}

.hero-grain {
  pointer-events: none;
  position: absolute;
  inset: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.hero-grid {
  width: min(100% - 2.5rem, var(--max-wide));
  margin: auto;
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: 2rem 3rem;
  align-items: center;
  flex: 1;
}

.hero-copy { position: relative; z-index: 2; max-width: 34rem; }
.hero-lead {
  margin: 1.5rem 0 2rem;
  color: var(--gray);
  font-size: 1.1rem;
  max-width: 32rem;
}
.hero-ctas { display: flex; flex-wrap: wrap; gap: 0.85rem; }

.hero-viz {
  position: relative;
  min-height: 420px;
}
#sift-field {
  width: 100%;
  height: auto;
  display: block;
}

.signal-callout {
  position: absolute;
  right: 4%;
  bottom: 12%;
  padding: 1rem 1.15rem;
  background: rgba(13, 17, 22, 0.82);
  border: 1px solid rgba(183, 243, 74, 0.35);
  backdrop-filter: blur(8px);
  min-width: 160px;
  animation: calloutIn 1.2s var(--ease) 0.8s both;
}
.callout-tag {
  color: var(--signal);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
}
@keyframes calloutIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: none; }
}

.hero-pipeline {
  width: min(100% - 2.5rem, var(--max-wide));
  margin: 1.5rem auto 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.65rem 0.85rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--gray);
}
.hero-pipeline .stage {
  transition: color 0.4s, text-shadow 0.4s;
}
.hero-pipeline .stage.active {
  color: var(--signal);
  text-shadow: 0 0 20px rgba(183, 243, 74, 0.35);
}
.hero-pipeline .pipe { opacity: 0.35; }

/* // Problem // */
.problem { background: var(--deep); }
.noise-field-wrap {
  position: relative;
  border: 1px solid var(--border);
  background: var(--graphite);
  overflow: hidden;
}
#noise-field { width: 100%; height: auto; display: block; }
.noise-labels {
  position: absolute;
  inset: auto 0 1rem;
  display: flex;
  justify-content: space-around;
  padding: 0 1rem;
  pointer-events: none;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  color: var(--gray);
}
.noise-labels span.active { color: var(--signal); }

/* // Capability stages // */
.stages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  margin-top: 1rem;
}
.stage-line {
  position: absolute;
  top: 1.35rem;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--signal), transparent);
  opacity: 0.35;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 1.4s var(--ease);
}
.stages.in-view .stage-line { transform: scaleX(1); }

.stage-block {
  position: relative;
  padding: 0 0.25rem;
}
.stage-num {
  display: block;
  color: var(--cyan);
  font-size: 0.75rem;
  margin-bottom: 1.5rem;
}
.stage-block h3 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.stage-block p { color: var(--gray); font-size: 0.95rem; }

/* // Immersive cluster // */
.immersive {
  background:
    radial-gradient(ellipse at center, rgba(85,230,209,0.05), transparent 60%),
    var(--deep);
}
.cluster-field-wrap {
  position: relative;
  border: 1px solid var(--border);
  background: #0a0e13;
  min-height: 360px;
}
#cluster-field { width: 100%; height: auto; display: block; cursor: crosshair; }

.cluster-tooltip {
  position: absolute;
  z-index: 5;
  width: 220px;
  padding: 1rem;
  background: rgba(8,11,15,0.92);
  border: 1px solid rgba(183,243,74,0.4);
  pointer-events: none;
  transform: translate(12px, 12px);
}
.cluster-tooltip .tip-title {
  color: var(--signal);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}
.tip-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8rem;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  color: var(--gray);
}
.tip-row span:last-child { color: var(--white); }

.cluster-legend {
  position: absolute;
  top: 1rem;
  left: 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 1rem;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}
.leg::before {
  content: "";
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  margin-right: 0.4rem;
  vertical-align: middle;
}
.leg.signal::before { background: var(--signal); }
.leg.noise::before { background: var(--gray); }
.leg.anomaly::before { background: #ff6b6b; }
.leg.pattern::before { background: var(--cyan); }
.leg.outlier::before { background: #f0a04b; }
.leg.prediction::before { background: #9b8cff; }

/* // Capability cards // */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}
.cap-card {
  padding: 1.75rem 1.5rem;
  background: var(--graphite);
  border: 1px solid var(--border);
  transition: border-color 0.3s, transform 0.3s var(--ease);
}
.cap-card:hover {
  border-color: rgba(183, 243, 74, 0.35);
  transform: translateY(-3px);
}
.cap-icon {
  width: 48px; height: 48px;
  color: var(--gray);
  margin-bottom: 1.25rem;
}
.cap-icon svg { width: 100%; height: 100%; }
.cap-card:hover .cap-icon { color: var(--cyan); }
.cap-num {
  color: var(--cyan);
  font-size: 0.7rem;
  display: block;
  margin-bottom: 0.65rem;
}
.cap-card h3 { margin-bottom: 0.65rem; }
.cap-card p { color: var(--gray); font-size: 0.92rem; }

/* // Engine pipeline // */
.engine { background: var(--graphite); }
.pipeline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 0.35rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}
.pipe-stage {
  flex: 1 1 110px;
  text-align: center;
  max-width: 150px;
}
.pipe-node {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 64px;
  padding: 0.75rem 0.5rem;
  border: 1px solid var(--border-strong);
  background: var(--obsidian);
  margin-bottom: 0.75rem;
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}
.pipe-node.accent { border-color: rgba(85,230,209,0.5); color: var(--cyan); }
.pipe-node.signal {
  border-color: rgba(183,243,74,0.55);
  color: var(--signal);
  box-shadow: 0 0 24px rgba(183,243,74,0.12);
}
.pipe-stage p { font-size: 0.78rem; color: var(--gray); line-height: 1.4; }
.pipe-arrow {
  color: var(--gray);
  opacity: 0.4;
  padding-top: 1.4rem;
  font-family: var(--font-mono);
}
.pipeline-canvas { width: 100%; height: 60px; display: block; opacity: 0.85; }

/* // Infrastructure layers // */
.layers { display: grid; gap: 0.65rem; }
.layer {
  text-align: left;
  width: 100%;
  padding: 1.25rem 1.5rem;
  background: var(--graphite);
  border: 1px solid var(--border);
  display: grid;
  grid-template-columns: 10rem 1fr;
  gap: 0.75rem 1.5rem;
  transition: border-color 0.25s, background 0.25s;
}
.layer:hover, .layer[aria-expanded="true"] {
  border-color: rgba(85,230,209,0.4);
  background: #1a2129;
}
.layer.signal-layer:hover, .layer.signal-layer[aria-expanded="true"] {
  border-color: rgba(183,243,74,0.45);
}
.layer-name {
  color: var(--cyan);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}
.layer.signal-layer .layer-name { color: var(--signal); }
.layer-desc { color: var(--gray); font-size: 0.95rem; }
.layer-detail {
  grid-column: 1 / -1;
  display: none;
  padding-top: 0.5rem;
  border-top: 1px solid var(--border);
  color: var(--gray);
  font-size: 0.88rem;
}
.layer-detail p { margin: 0.4rem 0; }
.layer-detail strong { color: var(--white); font-weight: 500; }
.layer[aria-expanded="true"] .layer-detail { display: block; }

/* // Applications // */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--border);
}
.app-item {
  padding: 2rem 1.5rem;
  border-bottom: 1px solid var(--border);
  border-right: 1px solid var(--border);
  transition: background 0.3s;
}
.app-item:nth-child(3n) { border-right: none; }
.app-item:hover { background: rgba(183,243,74,0.03); }
.app-item h3 {
  margin-bottom: 0.75rem;
  font-size: 1.15rem;
}
.app-item:hover h3 { color: var(--signal); }
.app-item p { color: var(--gray); font-size: 0.95rem; }

/* // Signal Index // */
.signal-index { background: var(--deep); }
.index-panel {
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--border);
  background:
    linear-gradient(135deg, rgba(183,243,74,0.04), transparent 40%),
    var(--graphite);
}
.index-hero-metric {
  margin-bottom: 2rem;
}
.index-hero-metric .big-num {
  font-size: clamp(4rem, 10vw, 7rem);
  line-height: 1;
  color: var(--signal);
  letter-spacing: -0.04em;
  margin: 0.35rem 0;
}
.strength-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--obsidian);
  background: var(--signal);
  padding: 0.35rem 0.7rem;
}
.index-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}
.spectrum { position: relative; margin-top: 1rem; }
.spectrum-bar {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.4fr 1.6fr;
  height: 48px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.seg {
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: clamp(0.5rem, 1.2vw, 0.65rem);
  letter-spacing: 0.08em;
  color: rgba(244,247,242,0.45);
}
.seg.noise { background: #1a1f26; }
.seg.weak { background: #243038; color: var(--cyan); }
.seg.strong { background: rgba(183,243,74,0.18); color: var(--signal); }
.seg.critical {
  background: linear-gradient(90deg, rgba(183,243,74,0.35), rgba(183,243,74,0.7));
  color: var(--obsidian);
  font-weight: 500;
}
.spectrum-marker {
  position: absolute;
  top: -6px;
  bottom: -6px;
  left: var(--pos);
  width: 2px;
  background: var(--white);
  box-shadow: 0 0 12px rgba(183,243,74,0.6);
  transform: translateX(-50%);
}

/* // Research // */
.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.research-card {
  padding: 2rem 1.5rem;
  border-top: 2px solid var(--signal);
  background: var(--graphite);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  border-left: 1px solid var(--border);
}
.research-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--cyan);
}
.research-card h3 {
  font-size: 1.35rem;
  margin-bottom: 1rem;
  line-height: 1.25;
}
.research-card p { color: var(--gray); font-size: 0.95rem; }

/* // Evaluation // */
.evaluation { background: var(--graphite); }
.eval-panel {
  border: 1px solid var(--border);
  background: var(--obsidian);
  padding: 1.75rem;
}
.eval-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 1.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
}
.eval-header .dim { color: var(--gray); font-size: 0.65rem; }
.eval-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}
.eval-metrics .value { font-size: 1.75rem; color: var(--signal); }
.curve-wrap { position: relative; }
#perf-curve { width: 100%; height: auto; display: block; background: #0a0d11; border: 1px solid var(--border); }
.curve-labels {
  display: flex;
  justify-content: space-between;
  margin-top: 0.75rem;
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  color: var(--gray);
}

/* // Human + Machine // */
.human-machine {
  background:
    linear-gradient(180deg, var(--obsidian), #12181f 50%, var(--obsidian));
}
.hm-split {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1.5rem;
  align-items: stretch;
  margin-top: 2rem;
}
.hm-panel {
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--graphite);
}
.hm-panel.human {
  background: #1a2229;
  border-color: rgba(244,247,242,0.12);
}
.panel-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
  margin-bottom: 1rem;
}
.hm-panel.human .panel-label { color: var(--gray); }
#machine-viz { width: 100%; height: auto; margin-bottom: 1rem; }
.hm-panel p { color: var(--gray); font-size: 0.95rem; }
.human-visual {
  position: relative;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  background:
    radial-gradient(circle at center, rgba(244,247,242,0.04), transparent 60%);
}
.crosshair {
  width: 80px; height: 80px;
  border: 1px solid rgba(244,247,242,0.2);
  position: relative;
}
.crosshair::before, .crosshair::after {
  content: "";
  position: absolute;
  background: var(--signal);
  opacity: 0.7;
}
.crosshair::before { width: 1px; height: 100%; left: 50%; top: 0; }
.crosshair::after { height: 1px; width: 100%; top: 50%; left: 0; }
.interpretation {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--white);
}
.hm-bridge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--gray);
  padding: 1rem 0.5rem;
}
.hm-bridge span:nth-child(odd) { color: var(--cyan); }
.hm-bridge span:nth-child(7) { color: var(--signal); }

/* // Why compare // */
.compare {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 1.25rem;
  margin-top: 2rem;
}
.compare-col {
  padding: 2rem 1.75rem;
  border: 1px solid var(--border);
}
.compare-col.traditional {
  background: transparent;
  opacity: 0.65;
}
.compare-col.atomsift {
  background: linear-gradient(160deg, rgba(183,243,74,0.08), rgba(13,17,22,0.9));
  border-color: rgba(183,243,74,0.4);
  box-shadow: 0 0 60px rgba(183,243,74,0.06);
}
.compare-col h3 {
  font-size: 0.8rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
  color: var(--gray);
}
.compare-col.atomsift h3 { color: var(--signal); }
.compare-col ul { display: grid; gap: 0.85rem; }
.compare-col li {
  padding-left: 1.25rem;
  position: relative;
  color: var(--gray);
  font-size: 1.05rem;
}
.compare-col li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.55em;
  width: 6px; height: 1px;
  background: var(--gray);
}
.compare-col.atomsift li { color: var(--white); }
.compare-col.atomsift li::before { background: var(--signal); width: 10px; }

/* // Scale // */
.scale { background: var(--deep); text-align: center; }
.scale-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 1rem;
}
.scale-item .big {
  display: block;
  font-size: clamp(2.2rem, 5vw, 3.75rem);
  color: var(--signal);
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 0.65rem;
}
.scale-item .label {
  text-transform: none;
  letter-spacing: 0.02em;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--gray);
}

/* // Future // */
.future {
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--deep);
  overflow: hidden;
  padding: 6rem 0;
}
.future-bg {
  position: absolute;
  inset: 0;
}
#future-canvas { width: 100%; height: 100%; display: block; }
.future-content { position: relative; z-index: 2; text-align: center; }
.future h2 {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  line-height: 1.15;
}
.future .line { display: block; }
.future .muted { color: var(--gray); font-weight: 500; }
.future .climax { margin-top: 0.5rem; }
.signal-explode {
  color: var(--signal);
  display: inline-block;
}

/* // CTA // */
.cta-section {
  position: relative;
  background: var(--obsidian);
  text-align: center;
  overflow: hidden;
  padding: clamp(6rem, 12vw, 9rem) 0;
}
.cta-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.55;
  pointer-events: none;
}
.cta-content { position: relative; z-index: 2; }
.cta-content p {
  max-width: 34rem;
  margin: 0 auto 2rem;
  color: var(--gray);
  font-size: 1.1rem;
}
.cta-content .hero-ctas { justify-content: center; }

/* // Footer // */
.site-footer {
  background: var(--deep);
  border-top: 1px solid var(--border);
  padding: 4rem 0 2rem;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2.5fr;
  gap: 3rem;
  margin-bottom: 3rem;
}
.tagline {
  margin-top: 1rem;
  color: var(--gray);
  font-size: 0.95rem;
  max-width: 16rem;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}
.footer-cols h3 {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 1rem;
  font-weight: 500;
}
.footer-cols a {
  display: block;
  color: var(--gray);
  font-size: 0.9rem;
  padding: 0.3rem 0;
  transition: color 0.2s;
}
.footer-cols a:hover { color: var(--signal); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--gray);
}
.dim { opacity: 0.7; }

/* // Responsive // */
@media (max-width: 1100px) {
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-viz { min-height: 340px; max-width: 640px; margin-inline: auto; width: 100%; }
  .stages { grid-template-columns: repeat(2, 1fr); }
  .stage-line { display: none; }
  .cap-grid, .apps-grid, .research-grid { grid-template-columns: repeat(2, 1fr); }
  .app-item:nth-child(3n) { border-right: 1px solid var(--border); }
  .app-item:nth-child(2n) { border-right: none; }
  .hm-split { grid-template-columns: 1fr; }
  .hm-bridge {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.65rem;
  }
  .scale-grid { grid-template-columns: repeat(2, 1fr); }
  .index-metrics, .eval-metrics { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
  .nav-center, .btn-nav { display: none; }
  .nav-toggle { display: flex; }
  .nav-inner { grid-template-columns: 1fr auto; }
  .layer { grid-template-columns: 1fr; }
  .compare { grid-template-columns: 1fr; }
  .compare-col.traditional { order: 2; opacity: 0.5; }
  .pipeline { flex-direction: column; align-items: stretch; }
  .pipe-stage { max-width: none; text-align: left; display: grid; grid-template-columns: 160px 1fr; gap: 1rem; align-items: center; }
  .pipe-arrow { transform: rotate(90deg); padding: 0; text-align: center; }
  .pipe-node { margin-bottom: 0; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .cap-grid, .apps-grid, .research-grid, .stages { grid-template-columns: 1fr; }
  .app-item { border-right: none !important; }
  .pipe-stage { grid-template-columns: 1fr; }
  .signal-callout { right: 2%; bottom: 4%; padding: 0.75rem; }
  .spectrum-bar { grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; height: auto; }
  .seg { min-height: 36px; }
  .scale-grid { gap: 1.5rem; }
  .hero-pipeline { font-size: 0.6rem; gap: 0.4rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}