:root {
  --navy: #0b2240;
  --navy-2: #163a63;
  --blue: #2f7fa8;
  --cyan: #72bdd6;
  --ink: #132033;
  --muted: #5f6d7e;
  --line: #dce5ee;
  --soft: #f3f7fa;
  --white: #ffffff;
  --shadow: 0 24px 80px rgba(10, 34, 64, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, Arial, sans-serif;
  line-height: 1.5;
}

img {
  display: block;
  max-width: 100%;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 14px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid rgba(220, 229, 238, 0.8);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 8px;
  background: var(--navy);
  color: var(--white);
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--navy);
  font-size: 14px;
  font-weight: 700;
}

.nav-cta {
  padding: 11px 18px;
  border-radius: 8px;
  background: var(--navy);
  color: var(--white);
}

.nav-toggle {
  display: none;
}

main {
  overflow: hidden;
}

.section-band {
  background:
    linear-gradient(90deg, rgba(11, 34, 64, 0.04), rgba(114, 189, 214, 0.08)),
    var(--soft);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(320px, 0.97fr);
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: clamp(44px, 7vw, 96px) clamp(20px, 6vw, 88px);
  gap: clamp(36px, 6vw, 92px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(48px, 7vw, 96px);
  line-height: 0.92;
}

h2 {
  color: var(--navy);
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.04;
}

h3 {
  color: var(--navy);
}

.hero-lede {
  max-width: 620px;
  color: var(--muted);
  font-size: clamp(18px, 2vw, 23px);
}

.hero-actions,
.professional,
.audience-list,
footer {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  padding: 0 22px;
  font-weight: 800;
}

.button.primary {
  background: var(--navy);
  color: var(--white);
  box-shadow: 0 16px 36px rgba(11, 34, 64, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--navy);
}

.contact-actions,
.footer-brand,
.social-links {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.social-links a {
  display: inline-grid;
  width: 48px;
  height: 48px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--navy);
  font-size: 20px;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 12px 28px rgba(10, 34, 64, 0.08);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.social-links a:hover,
.social-links a:focus-visible {
  border-color: var(--navy);
  background: var(--navy);
  color: var(--white);
  transform: translateY(-2px);
}

.social-links.compact a {
  width: 38px;
  height: 38px;
  font-size: 16px;
  box-shadow: none;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 560px;
  margin-top: 36px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.hero-points span {
  padding: 18px 16px;
  color: var(--navy);
  font-weight: 800;
  text-align: center;
}

.hero-points span + span {
  border-left: 1px solid var(--line);
}

.hero-scene,
.formulation-visual,
.case-visual {
  overflow: hidden;
  margin: 0;
  border: 1px solid rgba(220, 229, 238, 0.92);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.hero-scene {
  max-width: 610px;
  margin-top: 24px;
  aspect-ratio: 2.8 / 1;
}

.hero-scene img,
.formulation-visual img,
.case-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-product {
  position: relative;
  display: grid;
  min-height: 610px;
  place-items: center;
}

.product-glow {
  position: absolute;
  width: min(80%, 470px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(114, 189, 214, 0.24), rgba(114, 189, 214, 0));
}

.hero-product img {
  position: relative;
  width: min(100%, 520px);
  max-height: 640px;
  object-fit: contain;
  filter: drop-shadow(0 36px 40px rgba(10, 34, 64, 0.22));
}

.product-note {
  position: absolute;
  right: 2%;
  bottom: 14%;
  width: 168px;
  padding: 18px;
  border: 1px solid rgba(220, 229, 238, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.product-note strong,
.product-note span {
  display: block;
}

.product-note strong {
  color: var(--navy);
  font-size: 28px;
}

.product-note span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.function-strip,
.formulation,
.application,
.cases,
.professional,
.contact {
  padding: clamp(56px, 8vw, 112px) clamp(20px, 6vw, 88px);
}

.function-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  padding-top: 1px;
  padding-bottom: 1px;
}

.function-strip article {
  min-height: 250px;
  padding: clamp(28px, 4vw, 46px);
  background: var(--white);
}

.icon-ring {
  display: grid;
  width: 54px;
  height: 54px;
  place-items: center;
  margin-bottom: 28px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
}

.function-strip h2 {
  margin-bottom: 12px;
  font-size: 28px;
}

.function-strip p,
.section-heading p,
.ingredient-grid span,
.timeline p,
.case-copy p,
.case-board small,
.contact p,
footer span {
  color: var(--muted);
}

.section-heading {
  max-width: 760px;
}

.ingredient-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.formulation-visual {
  margin-top: 34px;
  aspect-ratio: 2.55 / 1;
}

.ingredient-grid article,
.timeline article,
.case-board article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.ingredient-grid article {
  padding: 24px;
}

.ingredient-grid strong,
.ingredient-grid span {
  display: block;
}

.ingredient-grid strong {
  margin-bottom: 8px;
  color: var(--navy);
  font-size: 18px;
}

.application {
  background: var(--white);
}

.timeline {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 34px;
}

.timeline article {
  position: relative;
  padding: 28px;
}

.timeline span {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  margin-bottom: 36px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-weight: 800;
}

.notice {
  margin-top: 22px;
  padding: 18px 20px;
  border-left: 4px solid var(--blue);
  background: var(--soft);
  color: var(--navy);
  font-weight: 700;
}

.cases {
  display: grid;
  grid-template-columns: minmax(280px, 0.86fr) minmax(320px, 1.14fr);
  gap: clamp(28px, 5vw, 68px);
  align-items: center;
}

.case-board {
  display: grid;
  gap: 14px;
}

.case-visual {
  aspect-ratio: 2.35 / 1;
}

.case-board article {
  display: grid;
  grid-template-columns: 92px 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 22px;
}

.case-board span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.case-board strong {
  color: var(--navy);
}

.professional {
  justify-content: space-between;
  gap: 30px;
}

.professional > div:first-child {
  max-width: 600px;
}

.audience-list {
  max-width: 640px;
}

.audience-list span {
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--white);
  color: var(--navy);
  font-size: 14px;
  font-weight: 800;
}

.contact {
  max-width: 980px;
}

.contact h2 {
  max-width: 760px;
}

.contact p {
  max-width: 680px;
  font-size: 18px;
}

.contact-actions {
  margin-top: 28px;
}

footer {
  justify-content: space-between;
  padding: 26px clamp(20px, 6vw, 88px);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

footer strong {
  color: var(--navy);
}

@media (max-width: 980px) {
  .hero,
  .cases {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-product {
    min-height: 520px;
  }

  .function-strip,
  .ingredient-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .case-board article {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .site-header {
    min-height: 68px;
    padding: 12px 18px;
  }

  .nav-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
  }

  .nav-toggle span {
    width: 18px;
    height: 2px;
    background: var(--navy);
  }

  .site-nav {
    position: absolute;
    top: 68px;
    right: 18px;
    left: 18px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 14px;
  }

  .nav-cta {
    text-align: center;
  }

  h1 {
    font-size: 46px;
  }

  h2 {
    font-size: 32px;
  }

  .hero {
    padding-top: 38px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-points {
    grid-template-columns: 1fr;
  }

  .hero-points span + span {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .hero-product {
    min-height: 430px;
  }

  .product-note {
    right: 0;
    bottom: 6%;
    width: 150px;
  }

}