:root {
  color: #1f2937;
  background: #f9fafb;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
}

a {
  color: #1d4ed8;
}

.site-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem max(1.25rem, calc((100% - 960px) / 2));
  background: #ffffff;
  border-bottom: 1px solid #e5e7eb;
}

.brand {
  color: #111827;
  font-size: 1.15rem;
  font-weight: 700;
  text-decoration: none;
}

nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

nav a {
  text-decoration: none;
}

main,
footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

section {
  padding: 4rem 0;
  border-bottom: 1px solid #e5e7eb;
}

.hero {
  padding: 7rem 0;
}

h1,
h2,
p {
  max-width: 680px;
}

h1 {
  margin: 0.25rem 0 1rem;
  color: #111827;
  font-size: clamp(2.25rem, 7vw, 4rem);
  line-height: 1.1;
}

h2 {
  color: #111827;
  font-size: 2rem;
}

.eyebrow {
  color: #2563eb;
  font-weight: 700;
}

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 0.7rem 1.1rem;
  color: #ffffff;
  background: #2563eb;
  border-radius: 0.4rem;
  font-weight: 700;
  text-decoration: none;
}

.button:hover,
.button:focus-visible {
  background: #1d4ed8;
}

.button-small {
  margin-top: 0;
  padding: 0.45rem 0.8rem;
}

footer {
  padding-top: 2rem;
  padding-bottom: 2rem;
  color: #6b7280;
}

@media (max-width: 720px) {
  .site-header {
    position: static;
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    gap: 0.75rem;
  }

  section {
    padding: 3rem 0;
  }

  .hero {
    padding: 4rem 0;
  }
}