:root {
  --bg: #f8fafc;
  --bg-alt: #ffffff;
  --text: #0f172a;
  --muted: #475569;
  --accent: #2565ff;
  --border: #dbe3ef;
  --shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

* {
  box-sizing: border-box;
}

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

.container {
  width: min(1080px, 92vw);
  margin: 0 auto;
}

.hero {
  padding: 5.5rem 0 4.5rem;
  text-align: center;
}

.brand {
  margin: 0 0 0.75rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.subtitle {
  margin: 0 auto 1.75rem;
  color: var(--muted);
  max-width: 680px;
  font-size: 1.1rem;
}

.supporting-text {
  margin-top: 1rem;
  color: var(--muted);
}

.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--bg-alt);
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  box-shadow: var(--shadow);
}

.btn:hover,
.btn:focus-visible {
  filter: brightness(1.05);
}

.card-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card,
.callout {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem;
  box-shadow: var(--shadow);
}

.card h3 {
  margin: 0;
  font-size: 1.05rem;
}

.feature-list,
.steps {
  margin: 1rem 0 0;
  padding-left: 1.25rem;
  display: grid;
  gap: 0.65rem;
}

.callout {
  text-align: center;
  max-width: 760px;
}

.footer {
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  text-align: center;
}

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

@media (max-width: 640px) {
  .hero {
    padding: 4.25rem 0 3.5rem;
  }

  .section {
    padding: 3rem 0;
  }
}