*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #f9fafb;
  color: #111827;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Nav */
header {
  padding: 1.25rem 2rem;
  border-bottom: 1px solid #e5e7eb;
  background: #ffffff;
}

nav {
  max-width: 960px;
  margin: 0 auto;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: #4f46e5;
  letter-spacing: -0.01em;
}

/* Hero */
main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
}

.hero {
  max-width: 640px;
  text-align: center;
}

h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: #111827;
  margin-bottom: 1.25rem;
}

.subheadline {
  font-size: 1.125rem;
  color: #6b7280;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.cta {
  display: inline-block;
  background: #4f46e5;
  color: #ffffff;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.75rem 2rem;
  border-radius: 8px;
  text-decoration: none;
}

.cta:hover {
  background: #4338ca;
}

/* Footer */
footer {
  padding: 1.5rem 2rem;
  text-align: center;
  font-size: 0.875rem;
  color: #9ca3af;
  border-top: 1px solid #e5e7eb;
}