:root {
  --color-bg: #f7f8f7;
  --color-surface: #ffffff;
  --color-text: #1c2422;
  --color-text-muted: #5b6663;
  --color-accent: #0f5c4b;
  --color-accent-dark: #0a4438;
  --color-border: #e2e6e4;
  --max-width: 1080px;
  --radius: 10px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

h1, h2, h3 {
  line-height: 1.25;
  margin: 0 0 0.5em 0;
  font-weight: 700;
}

p {
  margin: 0 0 1em 0;
  color: var(--color-text-muted);
}

a {
  color: var(--color-accent);
}

/* Top bar */

.topbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding-top: 14px;
  padding-bottom: 14px;
}

.topbar-logo {
  height: 28px;
  width: auto;
  display: block;
}

.topbar-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.topbar-nav a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
}

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

/* Hero */

.hero {
  background: var(--color-accent-dark);
  color: #ffffff;
  padding: 64px 0 56px;
  text-align: center;
}

.hero .badge {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.12);
  color: #d6ece5;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 2.75rem;
  margin-bottom: 0.2em;
  color: #ffffff;
}

.hero .subtitle {
  font-size: 1.25rem;
  font-weight: 500;
  color: #d6ece5;
  margin-bottom: 20px;
}

.hero .hero-text {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.82);
  max-width: 520px;
  margin: 0 auto 32px;
}

.cta {
  display: inline-block;
  background: #ffffff;
  color: var(--color-accent-dark);
  font-weight: 600;
  text-decoration: none;
  padding: 14px 32px;
  border-radius: var(--radius);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.cta:hover {
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

/* Sections */

.section {
  padding: 56px 0;
}

.section h2 {
  font-size: 1.6rem;
  text-align: center;
  margin-bottom: 36px;
  max-width: 640px;
  margin-left: auto;
  margin-right: auto;
}

.advances,
.privacy {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.advances .container,
.privacy .container {
  max-width: 640px;
}

/* Cards */

.cards {
  display: grid;
  gap: 20px;
}

.cards-3 {
  grid-template-columns: repeat(3, 1fr);
}

.cards-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.card h3 {
  font-size: 1.05rem;
}

.card p {
  margin-bottom: 0;
  font-size: 0.95rem;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 14px;
}

.steps-note {
  max-width: 560px;
  margin: 32px auto 0;
  text-align: center;
  font-size: 0.9rem;
}

/* Features */

.features {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

/* FAQ */

.faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: grid;
  gap: 20px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
}

.faq-item dt {
  font-weight: 600;
  margin-bottom: 8px;
}

.faq-item dd {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* Footer */

.footer {
  padding: 40px 0 56px;
  text-align: center;
  font-size: 0.85rem;
}

.footer p {
  margin-bottom: 0.6em;
}

.footer .legal {
  color: var(--color-text-muted);
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

.footer .copyright {
  color: var(--color-text-muted);
  margin-top: 1.2em;
}

/* Responsive */

@media (max-width: 720px) {
  .topbar-inner {
    justify-content: center;
    text-align: center;
  }

  .topbar-nav {
    justify-content: center;
    gap: 6px 16px;
  }

  .topbar-nav a {
    font-size: 0.85rem;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: 2.1rem;
  }

  .hero .subtitle {
    font-size: 1.1rem;
  }

  .section {
    padding: 40px 0;
  }

  .cards-3,
  .cards-2 {
    grid-template-columns: 1fr;
  }
}