:root {
  /* Cool graphite paper — not cream, not neon-AI dark+lime */
  --paper: #d7dce4;
  --ink: #14181f;
  --ink-soft: #2a3140;
  --mist: #5c6578;
  --foam: #f4f6f9;
  --signal: #c94232;
  --signal-deep: #9e2f24;
  --slate: #3d4a63;
  --panel: #eef1f6;
  --line: rgba(20, 24, 31, 0.12);
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Sora", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(ellipse 70% 50% at 0% 0%, rgba(201, 66, 50, 0.14), transparent 55%),
    radial-gradient(ellipse 55% 45% at 100% 10%, rgba(61, 74, 99, 0.18), transparent 50%),
    radial-gradient(ellipse 80% 50% at 50% 100%, rgba(244, 246, 249, 0.9), transparent 60%),
    linear-gradient(165deg, #cfd6e0 0%, #d7dce4 42%, #c8cfd9 100%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.05;
  pointer-events: none;
  mix-blend-mode: multiply;
  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='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.75rem;
  max-width: 1180px;
  margin: 0 auto;
}

.wordmark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
}

.top-link {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--mist);
  border-bottom: 1px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.top-link:hover {
  color: var(--ink);
  border-color: var(--signal);
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 1.75rem 4rem;
}

.hero {
  min-height: min(88vh, 860px);
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 2.5rem 3rem;
  align-items: center;
  padding: 1.5rem 0 3rem;
}

.hero-copy {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal-deep);
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.2rem, 9vw, 6.5rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
  color: var(--ink);
}

.headline {
  margin: 1.1rem 0 0;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.55rem, 3.6vw, 2.45rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 14ch;
  color: var(--ink-soft);
}

.lede {
  margin: 1.25rem 0 0;
  max-width: 28rem;
  font-size: 1.08rem;
  color: var(--mist);
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  font-family: var(--font-body);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: 2px;
  transition: transform 0.2s, background 0.2s, color 0.2s, border-color 0.2s;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--signal);
  color: var(--foam);
}

.btn-primary:hover {
  background: var(--signal-deep);
}

.btn-ghost {
  border: 1px solid var(--line);
  color: var(--ink);
  background: rgba(244, 246, 249, 0.55);
}

.btn-ghost:hover {
  border-color: rgba(201, 66, 50, 0.45);
}

/* Pairing visual — product moment with stage presence */
.hero-visual {
  margin: 0;
  min-width: 0;
}

.visual-stage {
  position: relative;
  border-radius: 0;
  padding: 0.25rem;
}

.pair-scene {
  width: 100%;
  height: auto;
  display: block;
  overflow: visible;
}

.pair-scene .orb {
  fill: rgba(244, 246, 249, 0.92);
  stroke: rgba(201, 66, 50, 0.22);
  stroke-width: 1.5;
}

.pair-scene .orb-quiet {
  stroke: rgba(61, 74, 99, 0.18);
}

.pair-scene .node-label {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  fill: var(--ink);
  letter-spacing: -0.02em;
}

.pair-scene .node-sub {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  fill: var(--signal-deep);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pair-scene .fp-ridge {
  fill: none;
  stroke: var(--signal);
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.pair-scene .fp-ridge.thick {
  stroke-width: 3;
}

.pair-scene .fingerprint {
  animation: fp-pulse 2.8s ease-in-out infinite;
  transform-origin: 120px 188px;
  transform-box: fill-box;
}

.pair-scene .card-stripe {
  fill: var(--signal);
}

.pair-scene .card-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  fill: var(--foam);
  letter-spacing: -0.02em;
}

.pair-scene .card-fp {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 500;
  fill: rgba(244, 246, 249, 0.72);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.pair-scene .bond-under {
  fill: none;
  stroke: rgba(201, 66, 50, 0.22);
  stroke-width: 10;
  stroke-linecap: round;
}

.pair-scene .bond {
  fill: none;
  stroke: url(#bondGrad);
  stroke-width: 3.5;
  stroke-linecap: round;
  stroke-dasharray: 10 12;
  animation: dash-flow 1.5s linear infinite;
}

.pair-scene .bond-pulse {
  fill: var(--signal);
  stroke: #fff;
  stroke-width: 2;
}

.pair-scene .bond-label {
  font-family: var(--font-body);
  font-size: 11px;
  font-weight: 600;
  fill: var(--signal-deep);
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.pair-scene .agent-rail {
  stroke: rgba(20, 24, 31, 0.14);
  stroke-width: 2;
  stroke-dasharray: 5 7;
}

.pair-scene .flow-arrow {
  fill: none;
  stroke: var(--slate);
  stroke-width: 2.5;
  stroke-linecap: round;
  marker-end: none;
  stroke-dasharray: 1 0;
  opacity: 0.55;
}

.pair-scene .agent-chip {
  fill: var(--foam);
  stroke: rgba(20, 24, 31, 0.1);
  stroke-width: 1.25;
}

.pair-scene .agent-chip.pay {
  fill: var(--signal);
  stroke: var(--signal-deep);
}

.pair-scene .agent-text {
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 600;
  fill: var(--ink);
}

.pair-scene .a3 .agent-text {
  fill: var(--foam);
}

.pair-scene .agent {
  animation: agent-rise 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
}

.pair-scene .a1 { animation-delay: 0.45s; }
.pair-scene .a2 { animation-delay: 0.65s; }
.pair-scene .a3 { animation-delay: 0.85s; }

.pair-scene .a3 .agent-chip {
  animation: pay-pop 2.4s ease-in-out infinite;
  transform-origin: center;
  transform-box: fill-box;
}

.visual-caption {
  margin: 0.9rem 0 0;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--ink-soft);
  letter-spacing: 0.01em;
  text-align: center;
  width: 100%;
}

.strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 1.5rem 0;
  margin-bottom: 3.5rem;
}

.strip-line {
  margin: 0;
  font-size: 1.05rem;
  color: var(--mist);
  max-width: 42rem;
}

.strip-line strong {
  color: var(--ink);
  font-weight: 600;
}

.shift {
  padding: 0 0 2.5rem;
}

.section-title {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.section-lede {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--mist);
  font-size: 1.02rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

.steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1.25rem;
  align-items: start;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.step-num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--signal);
  letter-spacing: -0.02em;
}

.steps h3 {
  margin: 0 0 0.35rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.steps p {
  margin: 0;
  color: var(--mist);
  font-size: 0.95rem;
  max-width: 32rem;
}

.soon {
  margin: 2.5rem 0 0;
  font-size: 0.9rem;
  color: var(--signal-deep);
  letter-spacing: 0.02em;
}

.foot {
  max-width: 1180px;
  margin: 0 auto;
  padding: 2rem 1.75rem 3rem;
  border-top: 1px solid var(--line);
  color: var(--mist);
  font-size: 0.8rem;
}

.foot p {
  margin: 0 0 0.4rem;
}

.foot a {
  color: var(--ink);
  border-bottom: 1px solid var(--signal);
}

.foot-note {
  opacity: 0.9;
}

.animate-in {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.85s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.18s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.42s; }
.delay-5 { animation-delay: 0.55s; }

@keyframes rise {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes dash-flow {
  to {
    stroke-dashoffset: -44;
  }
}

@keyframes agent-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fp-pulse {
  0%, 100% { opacity: 0.88; }
  50% { opacity: 1; }
}

@keyframes pay-pop {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.04); }
}

@media (prefers-reduced-motion: reduce) {
  .animate-in,
  .pair-scene .agent {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .pair-scene .bond,
  .pair-scene .bond-pulse,
  .pair-scene .fingerprint,
  .pair-scene .a3 .agent-chip {
    animation: none;
  }
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 2rem;
    padding-top: 2rem;
  }

  .hero-visual {
    order: -1;
  }
}

@media (max-width: 640px) {
  .top,
  main,
  .foot {
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .cta-row {
    flex-direction: column;
    align-items: stretch;
  }
}