* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #ffffff;
  color: #222;
}

header {
  display: flex;
  justify-content: space-between;
  padding: 15px 40px;
  background: #0b5cff;
  color: white;
  position: sticky;
  top: 0;
}

.logo {
  font-size: 24px;
  font-weight: bold;
}

.logo span {
  font-weight: 900;
}

nav a {
  color: white;
  margin-left: 20px;
  text-decoration: none;
}

.hero {
  padding: 80px 20px;
  text-align: center;
  background: #0b5cff;
  color: white;
}

.hero h1 {
  font-size: 40px;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: #25D366;
  color: white;
  text-decoration: none;
  border-radius: 5px;
  font-weight: bold;
}

.btn.small {
  margin-top: 15px;
}

section {
  padding: 60px 20px;
  max-width: 1000px;
  margin: auto;
  text-align: center;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
  gap: 20px;
  margin-top: 30px;
}

.card {
  padding: 25px;
  border: 1px solid #ddd;
  border-radius: 10px;
  font-size: 18px;
}

footer {
  padding: 20px;
  text-align: center;
  background: #f2f2f2;
}