:root {
  --ink: #16282e;
  --muted: #607379;
  --paper: #f4f7f4;
  --surface: #ffffff;
  --line: #d9e4e0;
  --dark: #071318;
  --dark-2: #10262e;
  --blue: #2066a3;
  --teal: #2f7f75;
  --mint: #e2f2ed;
  --lime: #c9f36c;
  --coral: #d8694f;
  --shadow: 0 22px 60px rgba(15, 37, 44, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

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

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(244, 247, 244, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.ad-note {
  padding: 6px 16px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  background: #edf3ef;
  border-bottom: 1px solid var(--line);
}

.nav {
  width: min(1180px, calc(100% - 32px));
  height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
}

.brand-mark {
  width: 36px;
  height: 36px;
  display: inline-grid;
  place-items: center;
  color: #061116;
  background: var(--lime);
  border-radius: 8px;
  font-weight: 950;
}

.nav-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-weight: 760;
}

.nav-cta,
.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 900;
  text-align: center;
}

.nav-cta,
.button.primary {
  color: #071318;
  background: var(--lime);
}

.button.ghost {
  color: var(--ink);
  background: #fff;
  border-color: var(--line);
}

.button.large {
  min-width: 260px;
}

.hero {
  width: min(1180px, calc(100% - 32px));
  min-height: calc(100svh - 106px);
  margin: 0 auto;
  padding: 58px 0 72px;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(360px, 1.12fr);
  gap: 46px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 13px;
  color: var(--teal);
  font-size: 12px;
  font-weight: 950;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero h1,
.section h2,
.purchase-panel h2,
.legal-page h1 {
  margin: 0;
  letter-spacing: 0;
  line-height: 1.03;
}

.hero h1 {
  max-width: 680px;
  font-size: clamp(46px, 5.2vw, 78px);
}

.hero p {
  max-width: 620px;
  color: #415a60;
  font-size: 20px;
}

.hero-actions,
.quick-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.quick-facts span {
  padding: 8px 11px;
  color: #28444a;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 820;
}

.product-card {
  min-height: 560px;
  display: grid;
  place-items: center;
  align-content: center;
  gap: 20px;
  padding: 34px;
  background:
    radial-gradient(circle at 75% 18%, rgba(201, 243, 108, 0.34), transparent 16rem),
    linear-gradient(145deg, #132f39, #071318);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.product-card img {
  width: min(92%, 620px);
  filter: drop-shadow(0 28px 34px rgba(0, 0, 0, 0.36));
}

.product-caption {
  width: 100%;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-top: 18px;
  color: #f5fbff;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
}

.product-caption span {
  color: #b8c9cf;
}

.trust-strip {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.trust-strip span {
  min-height: 72px;
  display: grid;
  place-items: center;
  padding: 14px;
  background: #fff;
  font-weight: 900;
  text-align: center;
}

.section,
.purchase-panel {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 88px 0;
}

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

.section-head p,
.routine-copy p,
.purchase-panel p,
.cuff-copy p,
.feature-grid p,
.footer p,
.legal-page p,
.reference-grid span {
  color: var(--muted);
}

.section h2,
.purchase-panel h2 {
  font-size: clamp(36px, 4.5vw, 62px);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 32px;
}

.feature-grid article {
  min-height: 270px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-grid span {
  color: var(--coral);
  font-size: 13px;
  font-weight: 950;
}

.feature-grid h3 {
  margin: auto 0 10px;
  font-size: 24px;
  line-height: 1.15;
}

.cuff-focus {
  width: 100%;
  padding-left: max(16px, calc((100% - 1180px) / 2));
  padding-right: max(16px, calc((100% - 1180px) / 2));
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 46px;
  align-items: center;
  background: var(--dark);
  color: #fff;
}

.cuff-image img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 8px;
}

.cuff-copy .eyebrow {
  color: var(--lime);
}

.cuff-copy p {
  color: #bdd0d6;
  font-size: 18px;
}

.spec-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.spec-list div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
}

.spec-list strong,
.spec-list span {
  display: block;
}

.spec-list span {
  margin-top: 4px;
  color: #bdd0d6;
}

.routine {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 42px;
  align-items: start;
}

.routine-steps {
  display: grid;
  gap: 14px;
}

.routine-steps div {
  display: grid;
  grid-template-columns: 58px 1fr;
  gap: 18px;
  align-items: center;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.routine-steps strong {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  background: var(--mint);
  border-radius: 8px;
}

.purchase-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 34px;
  align-items: center;
  padding: 46px;
  color: #fff;
  background: linear-gradient(135deg, #10262e, #071318);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.purchase-panel .eyebrow {
  color: var(--lime);
}

.purchase-panel p {
  color: #bdd0d6;
}

.references {
  padding-top: 72px;
}

.section-head.compact {
  max-width: 640px;
}

.reference-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.reference-grid a {
  min-height: 150px;
  padding: 20px;
  display: grid;
  align-content: start;
  gap: 10px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.footer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 340px);
  gap: 40px;
  padding: 48px max(16px, calc((100% - 1180px) / 2));
  background: var(--dark);
  color: #fff;
}

.footer p {
  color: #aebec4;
  max-width: 760px;
}

.footer-links {
  display: grid;
  gap: 10px;
  color: #dbe7ea;
}

.legal-page {
  max-width: 860px;
}

.legal-page h1 {
  font-size: clamp(42px, 7vw, 72px);
}

.legal-page h2 {
  margin: 34px 0 10px;
  font-size: 24px;
}

.legal-date {
  margin: 16px 0 28px;
  color: var(--muted);
  font-weight: 850;
}

@media (max-width: 980px) {
  .nav-links,
  .nav-cta {
    display: none;
  }

  .hero,
  .cuff-focus,
  .routine,
  .purchase-panel,
  .footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 40px;
  }

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

  .feature-grid,
  .reference-grid,
  .trust-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav,
  .hero,
  .section,
  .purchase-panel,
  .trust-strip {
    width: calc(100% - 24px);
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero p,
  .cuff-copy p {
    font-size: 17px;
  }

  .hero-actions .button,
  .purchase-panel .button {
    width: 100%;
  }

  .product-card {
    min-height: 330px;
    padding: 22px;
  }

  .product-caption {
    display: grid;
  }

  .routine-steps div {
    grid-template-columns: 1fr;
  }
}