:root {
  --violet: #7c3aed;
  --violet-deep: #4c1d95;
  --violet-soft: #f5f0ff;
  --ink: #1a1a1a;
  --muted: #5f6368;
  --line: #e2e2e2;
  --black: #0a0a0a;
  --hero-gray: #a1a1aa;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: #ffffff;
  margin: 0;
  line-height: 1.6;
}

/* ——— Black bookend: header ——— */
header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--black);
  border-bottom: 1px solid #26262b;
}

.nav {
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav .wordmark {
  font-weight: 800;
  font-size: 17px;
  letter-spacing: -0.3px;
  text-decoration: none;
  color: #fff;
  margin-right: auto;
}

.nav .wordmark .dot { color: var(--violet); }

.nav a.link {
  font-size: 14px;
  color: #b8b8c0;
  text-decoration: none;
}

.nav a.link:hover { color: #fff; }

.pill {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--violet);
  border-radius: 999px;
  padding: 10px 22px;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.pill:hover { background: var(--violet-deep); }

.nav .pill { padding: 8px 18px; }

main { margin: 0; }

/* ——— Cinematic dark chemistry hero ——— */
.hero {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(900px 480px at 78% 18%, rgba(124, 58, 237, 0.38), transparent 60%),
    radial-gradient(700px 420px at 12% 88%, rgba(76, 29, 149, 0.5), transparent 60%),
    var(--black);
  padding: 150px 28px 170px;
}

.hero .equations {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  color: rgba(255, 255, 255, 0.055);
  font-size: 15px;
  line-height: 2.6;
  white-space: pre;
  padding: 40px;
}

.hero .molecule {
  position: absolute;
  right: 6%;
  top: 16%;
  width: 340px;
  opacity: 0.5;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: 1080px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 64px;
  line-height: 1.05;
  margin: 0 0 20px;
  letter-spacing: -1.5px;
  font-weight: 800;
}

.hero h1 .tone { color: var(--violet); }

.hero .sub {
  font-size: 18px;
  color: var(--hero-gray);
  margin: 0 0 34px;
  max-width: 600px;
}

.hero .pill {
  font-size: 15px;
  padding: 13px 30px;
}

/* ——— Sections ——— */
section.block {
  padding: 110px 28px;
  scroll-margin-top: 60px;
}

.wrap {
  max-width: 1080px;
  margin: 0 auto;
}

.eyebrow {
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--violet);
  margin: 0 0 16px;
}

h2.headline {
  font-size: 40px;
  line-height: 1.12;
  letter-spacing: -0.8px;
  margin: 0 0 20px;
  font-weight: 800;
  color: var(--ink);
}

h2.headline .tone { color: var(--violet); }

.lede {
  font-size: 18px;
  color: var(--muted);
  margin: 0 0 20px;
  max-width: 640px;
}

/* ——— Product cards ——— */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-top: 48px;
}

.card {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(8px);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 28px;
  box-shadow: 0 12px 40px rgba(76, 29, 149, 0.07);
}

.card .mol {
  width: 44px;
  height: 44px;
  margin-bottom: 18px;
}

.card h3 {
  font-size: 19px;
  margin: 0 0 10px;
  letter-spacing: -0.2px;
}

.card h3 .tone { color: var(--violet); }

.card p {
  font-size: 15px;
  color: var(--muted);
  margin: 0;
}

/* ——— Dark data-partners band ——— */
.band {
  position: relative;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(800px 420px at 15% 20%, rgba(124, 58, 237, 0.35), transparent 60%),
    radial-gradient(700px 500px at 88% 90%, rgba(76, 29, 149, 0.45), transparent 60%),
    var(--black);
}

.band .eyebrow { color: #c4b5fd; }

.band h2.headline { color: #fff; }

.band h2.headline .tone { color: var(--violet); }

.glass {
  background: rgba(255, 255, 255, 0.07);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  padding: 44px 40px;
  margin-top: 40px;
  max-width: 760px;
}

.glass p {
  font-size: 18px;
  color: #d6d6dc;
  margin: 0 0 18px;
}

.glass p:last-of-type { margin-bottom: 30px; }

.review-note {
  font-size: 13px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 10px;
  padding: 12px 16px;
  margin-top: 28px;
  max-width: 760px;
  background: #fff;
}

.band .review-note {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.18);
  color: #a1a1aa;
}

.contact-cta { text-align: left; }

.contact-cta .pill {
  font-size: 16px;
  padding: 15px 36px;
  margin-top: 8px;
}

.contact-alt {
  font-size: 14px;
  color: var(--muted);
  margin-top: 18px;
}

.contact-alt a {
  color: var(--violet);
  text-decoration: none;
  font-weight: 600;
}

/* ——— Black bookend: footer ——— */
footer {
  background: var(--black);
  color: #8a8a93;
  padding: 44px 28px;
}

footer .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
}

footer .wordmark {
  font-weight: 800;
  font-size: 16px;
  color: #fff;
  text-decoration: none;
  margin-right: auto;
}

footer .wordmark .dot { color: var(--violet); }

footer p {
  font-size: 13px;
  margin: 0;
}