:root {
  --page: #f4f6f8;
  --surface: #fff;
  --ink: #101827;
  --muted: #667085;
  --line: #dce2e8;
  --brand: #0f9187;
  --brand-strong: #08756d;
  --indigo: #4f46e5;
  --success: #16794d;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--page);
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  line-height: 1.58;
}

a {
  color: inherit;
}

:focus-visible {
  outline: 3px solid rgb(15 145 135 / 28%);
  outline-offset: 3px;
}

.site-header,
.site-footer-inner,
.hero-inner,
.section-inner,
.article {
  width: min(1120px, calc(100% - 32px));
  margin-inline: auto;
}

.site-header {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 11px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 9px;
  background: var(--ink);
  color: #fff;
}

.brand-mark svg {
  width: 23px;
  height: 23px;
}

.site-nav,
.footer-links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.site-nav a,
.footer-links a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  padding: 0 11px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
}

.site-nav a:hover,
.footer-links a:hover {
  color: var(--ink);
  background: #e9edf1;
}

.button,
.site-nav .button {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 10px 17px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  font-weight: 750;
  text-decoration: none;
  transition: background-color 150ms ease, transform 120ms ease;
}

.button:hover,
.site-nav .button:hover {
  background: var(--brand-strong);
  color: #fff;
}

.button:active {
  transform: scale(.98);
}

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

.button-secondary:hover {
  background: #eef2f4;
}

.hero {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line);
  background:
    radial-gradient(circle at 80% 20%, rgb(79 70 229 / 16%), transparent 35%),
    radial-gradient(circle at 70% 88%, rgb(15 145 135 / 18%), transparent 32%),
    #fbfcfd;
}

.hero::after {
  content: "";
  position: absolute;
  width: 540px;
  height: 540px;
  right: -170px;
  bottom: -310px;
  border: 1px solid rgb(79 70 229 / 16%);
  border-radius: 50%;
}

.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 620px;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(390px, 1.05fr);
  align-items: center;
  gap: 72px;
  padding: 70px 0;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--brand-strong);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: .08em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 11ch;
  margin-bottom: 22px;
  font-size: clamp(54px, 7vw, 88px);
  line-height: .98;
  letter-spacing: -.045em;
  text-wrap: balance;
}

.hero-lead {
  max-width: 600px;
  margin-bottom: 0;
  color: #475467;
  font-size: 20px;
  text-wrap: pretty;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 20px 0 0;
  padding: 0;
  color: #475467;
  font-size: 13px;
  font-weight: 650;
  list-style: none;
}

.hero-proof li::before {
  content: "✓";
  margin-right: 7px;
  color: var(--success);
}

.promo-preview {
  padding: 26px;
  border: 1px solid rgb(16 24 39 / 10%);
  border-radius: 18px;
  background: rgb(255 255 255 / 88%);
  box-shadow: 0 30px 70px rgb(16 24 39 / 12%);
  transform: rotate(-1.5deg);
}

.preview-top,
.preview-tier,
.preview-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.preview-top {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.preview-top span,
.preview-tier span,
.preview-summary span {
  color: var(--muted);
  font-size: 13px;
}

.preview-product {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: #eef2f4;
  color: var(--brand-strong);
  font-size: 22px;
  font-weight: 850;
}

.preview-tiers {
  display: grid;
  gap: 10px;
  padding: 22px 0;
}

.preview-tier {
  min-height: 56px;
  padding: 0 16px;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.preview-tier.is-active {
  border-color: rgb(15 145 135 / 45%);
  background: rgb(15 145 135 / 7%);
}

.preview-tier strong {
  font-size: 16px;
}

.preview-tier b {
  color: var(--brand-strong);
  font-size: 18px;
}

.preview-summary {
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.preview-summary strong {
  font-size: 22px;
}

.section {
  padding: 82px 0;
}

.section-alt {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 38px;
}

.section-heading h2 {
  margin-bottom: 12px;
  font-size: clamp(36px, 4vw, 50px);
  line-height: 1.08;
  letter-spacing: -.035em;
  text-wrap: balance;
}

.section-heading p,
.feature p {
  color: var(--muted);
  font-size: 17px;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.step {
  padding: 28px 28px 0 0;
}

.step + .step {
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

.step-number {
  display: block;
  margin-bottom: 18px;
  color: var(--brand);
  font-size: 26px;
  font-weight: 850;
}

.step h3 {
  margin-bottom: 8px;
  font-size: 19px;
}

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

.feature {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, .85fr);
  align-items: start;
  gap: 64px;
}

.check-list {
  display: grid;
  gap: 13px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 10px;
}

.check-list li::before {
  content: "✓";
  color: var(--success);
  font-weight: 850;
}

.safety-card {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f7f9fa;
}

.safety-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 22px;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.site-footer-inner {
  min-height: 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--muted);
  font-size: 14px;
}

.article {
  max-width: 820px;
  padding: 64px 0 90px;
}

.article h1 {
  max-width: 13ch;
  font-size: clamp(48px, 7vw, 76px);
}

.article > p {
  color: #475467;
  font-size: 18px;
}

.article-section {
  margin-top: 48px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.article-section h2 {
  margin-bottom: 14px;
  font-size: 30px;
  line-height: 1.15;
  letter-spacing: -.025em;
}

.article-section h3 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 20px;
}

.article-section li + li {
  margin-top: 8px;
}

.notice {
  margin: 24px 0;
  padding: 18px 20px;
  border-left: 4px solid var(--brand);
  border-radius: 0 8px 8px 0;
  background: #eaf7f5;
}

code {
  padding: 2px 5px;
  border-radius: 5px;
  background: #e8edf0;
  font-size: .9em;
}

@media (max-width: 860px) {
  .hero-inner,
  .feature {
    grid-template-columns: 1fr;
  }

  .hero-inner {
    gap: 44px;
  }

  .promo-preview {
    transform: none;
  }

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

  .step {
    padding: 24px 0;
  }

  .step + .step {
    border-top: 1px solid var(--line);
    border-left: 0;
    padding-left: 0;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 64px;
  }

  .site-nav > a:not(.button) {
    display: none;
  }

  .site-header,
  .site-footer-inner,
  .hero-inner,
  .section-inner,
  .article {
    width: min(100% - 24px, 1120px);
  }

  .hero-inner {
    min-height: 0;
    padding: 54px 0;
  }

  .hero-lead {
    font-size: 18px;
  }

  .section {
    padding: 62px 0;
  }

  .promo-preview,
  .safety-card {
    padding: 20px;
  }

  .site-footer-inner {
    min-height: 120px;
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
  }

  .article {
    padding-top: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}