* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #222;
  background: #fff;
}

.container {
  width: min(900px, 90%);
  margin: 0 auto;
}

.hero {
  padding: 100px 0;
  text-align: center;
  background: #f5f7fa;
}

.hero h1 {
  margin: 0 0 16px;
  font-size: 3rem;
}

.subtitle {
  max-width: 600px;
  margin: 0 auto 24px;
  font-size: 1.1rem;
  color: #555;
}

.button {
  display: inline-block;
  padding: 12px 22px;
  text-decoration: none;
  background: #111;
  color: #fff;
  border-radius: 8px;
}

.section {
  padding: 70px 0;
}

.section.alt {
  background: #fafafa;
}

h2 {
  margin-top: 0;
}

.footer {
  padding: 30px 0;
  text-align: center;
  color: #666;
  border-top: 1px solid #eee;
}