* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  color: #1f2937;
  background: #f8fafc;
}

.container {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: 88px 0;
  background: #111827;
  color: #ffffff;
}

.eyebrow {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.1;
}

h2 {
  margin-top: 0;
  font-size: 28px;
}

.button {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 20px;
  border-radius: 8px;
  background: #ffffff;
  color: #111827;
  font-weight: 700;
  text-decoration: none;
}

.section {
  padding: 64px 0;
}

.steps {
  padding-left: 24px;
}

.note {
  margin-bottom: 24px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.card {
  padding: 24px;
  border: 1px solid #e5e7eb;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.card h3 {
  margin-top: 0;
}

code {
  padding: 2px 6px;
  border-radius: 4px;
  background: #e5e7eb;
}

.error {
  color: #b91c1c;
}

footer {
  padding: 28px 0;
  text-align: center;
  color: #6b7280;
}