* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  color: #1d1d1f;
  background: #ffffff;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  border-bottom: 1px solid #e5e5e5;
}

.header nav a {
  margin-left: 25px;
  text-decoration: none;
  color: #1d1d1f;
  font-size: 14px;
}

.logo {
  font-weight: 600;
}

/* HERO */
.hero {
  text-align: center;
  padding: 120px 20px;
}

.hero h1 {
  font-size: 48px;
  margin-bottom: 15px;
}

.hero p {
  font-size: 20px;
  color: #6e6e73;
  margin-bottom: 30px;
}

.btn {
  padding: 12px 30px;
  border-radius: 25px;
  background: #0071e3;
  color: white;
  text-decoration: none;
}

/* SECTIONS */
.section {
  padding: 100px 60px;
}

.section h2 {
  text-align: center;
  font-size: 36px;
  margin-bottom: 60px;
}

.gray {
  background: #f5f5f7;
}

/* CARDS */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
}

.card img {
  width: 100%;
  border-radius: 12px;
  margin-bottom: 20px;
}

.card h3 {
  margin-bottom: 10px;
}

.card p {
  color: #6e6e73;
}

/* GRID */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 40px;
}

.center {
  text-align: center;
  max-width: 800px;
  margin: auto;
  color: #6e6e73;
}

/* FOOTER */
.footer {
  text-align: center;
  padding: 30px;
  font-size: 14px;
  color: #6e6e73;
}