:root {
  --white: #ffffff;
  --soft-white: #f7f4ee;
  --black: #080808;
  --muted: #6f6a60;
  --line: rgba(8, 8, 8, 0.12);
  --gold: #c9a44c;
  --gold-soft: #f1dfac;
  --glass: rgba(255, 255, 255, 0.62);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.08);
  --radius-lg: 34px;
  --radius-md: 24px;
  --max: 1280px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--soft-white);
  color: var(--black);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 50;
  width: min(calc(100% - 32px), 1180px);
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px);
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.06);
}

.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 1px;
  font-size: 22px;
  letter-spacing: -0.05em;
}

.logo span {
  font-weight: 300;
}

.logo strong {
  font-weight: 800;
  color: var(--gold);
}

.nav {
  display: flex;
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

.nav a:hover {
  color: var(--black);
}

.header-cta {
  padding: 11px 18px;
  border-radius: 999px;
  background: var(--black);
  color: var(--white);
  font-size: 14px;
}

.menu-toggle {
  display: none;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 110px 0;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 64px;
  min-height: 100vh;
  align-items: center;
  padding-top: 150px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 80px -12vw 40px;
  z-index: -1;
  background:
    radial-gradient(circle at 75% 35%, rgba(201, 164, 76, 0.32), transparent 36%),
    radial-gradient(circle at 20% 15%, rgba(255, 255, 255, 0.95), transparent 35%);
  border-radius: 60px;
  max-width: var(--max);
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 22px;
  font-size: clamp(56px, 8vw, 112px);
  line-height: 0.88;
  letter-spacing: -0.085em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 72px);
  line-height: 0.95;
  letter-spacing: -0.07em;
}

h3 {
  margin-bottom: 14px;
  font-size: 24px;
  line-height: 1.02;
  letter-spacing: -0.04em;
}

.hero-subtitle,
.section-heading p,
.manufacturing-copy p,
.start-box p {
  max-width: 620px;
  color: var(--muted);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 18px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.button.primary {
  background: var(--black);
  color: var(--white);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.16);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.54);
}

.hero-note {
  color: var(--muted);
  font-size: 14px;
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.stack-card {
  position: absolute;
  width: min(360px, 90%);
  padding: 28px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.stack-card span {
  display: block;
  margin-bottom: 52px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.stack-card p {
  color: inherit;
  opacity: 0.72;
}

.card-gold {
  top: 0;
  right: 22px;
  background: linear-gradient(135deg, #f8e8b7, #b88b2e);
}

.card-black {
  top: 185px;
  left: 0;
  background: var(--black);
  color: var(--white);
}

.card-white {
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: blur(22px);
  border: 1px solid rgba(255, 255, 255, 0.65);
}

.section-heading {
  margin-bottom: 46px;
}

.bento-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.85fr 0.85fr;
  gap: 18px;
}

.bento-card {
  min-height: 260px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.bento-card.large {
  grid-row: span 2;
  min-height: 540px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.72), rgba(241,223,172,0.45)),
    radial-gradient(circle at 70% 80%, rgba(201,164,76,0.4), transparent 40%);
}

.bento-card.dark {
  background: var(--black);
  color: var(--white);
}

.bento-card.metric {
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background: linear-gradient(135deg, var(--black), #2a2418);
  color: var(--white);
}

.bento-card.metric strong {
  font-size: 58px;
  letter-spacing: -0.08em;
}

.label {
  display: inline-block;
  margin-bottom: 90px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.science-steps {
  display: grid;
  gap: 18px;
}

.science-card {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 32px;
  align-items: center;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow);
}

.science-visual {
  position: relative;
  min-height: 230px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #fff, #f0e4c2);
  overflow: hidden;
}

.hair-line {
  position: absolute;
  left: 18%;
  top: 20%;
  width: 6px;
  height: 65%;
  border-radius: 999px;
  background: var(--black);
}

.particle-dot {
  position: absolute;
  right: 24%;
  top: 35%;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  background: var(--gold);
}

.particle-dot.small {
  right: 39%;
  top: 55%;
  width: 18px;
  height: 18px;
}

.particle-dot.tiny {
  right: 18%;
  top: 62%;
  width: 10px;
  height: 10px;
}

.lipid-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.lipid-visual span {
  width: 72px;
  height: 72px;
  border: 1px solid rgba(8, 8, 8, 0.2);
  border-radius: 50%;
  background: rgba(201, 164, 76, 0.36);
  box-shadow: inset 0 0 0 18px rgba(255, 255, 255, 0.35);
}

.temp-visual {
  display: grid;
  place-items: center;
  text-align: center;
}

.temp-visual strong {
  display: block;
  font-size: 64px;
  letter-spacing: -0.08em;
}

.temp-visual small {
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.step-number {
  color: var(--gold);
  font-weight: 900;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.proof-card {
  min-height: 170px;
  padding: 26px;
  border: 1px solid rgba(255,255,255,0.65);
  border-radius: var(--radius-md);
  background: var(--glass);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.proof-card strong {
  display: block;
  margin-bottom: 42px;
  font-size: 42px;
  letter-spacing: -0.06em;
}

.proof-card span {
  color: var(--muted);
}

.comparison-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--line);
}

.comparison-strip div {
  padding: 24px;
  background: rgba(255,255,255,0.72);
}

.comparison-strip span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.protocol-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.protocol-grid article,
.path-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: rgba(255,255,255,0.66);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.protocol-grid span {
  color: var(--gold);
  font-weight: 900;
}

.manufacturing-section {
  display: grid;
  grid-template-columns: 1fr 0.85fr;
  gap: 42px;
  align-items: center;
}

.batch-panel {
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--black);
  color: var(--white);
  box-shadow: var(--shadow);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  padding: 16px 16px 26px;
  color: var(--gold-soft);
}

.batch-row {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 16px;
  border-top: 1px solid rgba(255,255,255,0.12);
}

.batch-row span {
  color: rgba(255,255,255,0.62);
}

.dual-path-section {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.start-section {
  padding-bottom: 140px;
}

.start-box {
  max-width: 760px;
  margin: 0 auto;
  padding: 54px;
  border-radius: 42px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(201,164,76,0.3), transparent 45%),
    rgba(255,255,255,0.76);
  border: 1px solid rgba(255,255,255,0.72);
  box-shadow: var(--shadow);
}

.start-box p {
  margin-left: auto;
  margin-right: auto;
}

.start-options {
  display: flex;
  justify-content: space-between;
  max-width: 420px;
  margin: 34px auto;
  padding: 18px 22px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid var(--line);
}

.large-button {
  min-height: 56px;
  padding-inline: 30px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
  padding: 32px 0 46px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  .site-header {
    border-radius: 24px;
  }

  .nav,
  .header-cta {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    flex-direction: column;
    gap: 5px;
    padding: 12px;
    border: 0;
    background: transparent;
  }

  .menu-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--black);
  }

  .nav.is-open {
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    display: grid;
    gap: 14px;
    padding: 22px;
    border-radius: 24px;
    background: rgba(255,255,255,0.94);
    box-shadow: var(--shadow);
  }

  .hero,
  .manufacturing-section,
  .dual-path-section,
  .science-card {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 680px;
  }

  .bento-grid,
  .proof-grid,
  .protocol-grid,
  .comparison-strip {
    grid-template-columns: 1fr;
  }

  .bento-card.large {
    min-height: 360px;
  }

  .section {
    padding: 78px 20px;
  }
  .hero {
    padding-top: 110px !important;
  }

  .site-footer {
    display: grid;
    gap: 14px;
  }
}