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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #1d1d1f;
  background-color: #fff;
  line-height: 1.6;
}

header {
  background-color: #f8f8f8;
  border-bottom: 1px solid #d2d2d7;
  padding: 10px 20px;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  gap: 30px;
}

nav ul li a {
  text-decoration: none;
  color: #1d1d1f;
  font-size: 16px;
  font-weight: 500;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #0071e3;
}

.hero {
  background-color: #f5f5f7;
  padding: 60px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 40px;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero p {
  font-size: 20px;
  color: #6e6e73;
}

section {
  max-width: 800px;
  margin: 50px auto;
  padding: 0 20px;
}

h2 {
  font-size: 28px;
  font-weight: 600;
  margin-bottom: 20px;
}

footer {
  background-color: #f8f8f8;
  border-top: 1px solid #d2d2d7;
  text-align: center;
  padding: 20px;
  font-size: 14px;
  color: #6e6e73;
  margin-top: 50px;
}