* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  color: #222;
  background: #f5f7fa;
  line-height: 1.6;
}

.hero {
  background: #0f172a;
  color: white;
  padding: 80px 20px;
  text-align: center;
}

.hero h1 {
  font-size: 42px;
  margin-bottom: 10px;
}

.hero p {
  font-size: 20px;
  max-width: 700px;
  margin: 0 auto 30px;
}

.btn {
  display: inline-block;
  background: #2563eb;
  color: white;
  padding: 12px 22px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
}

main {
  max-width: 1000px;
  margin: auto;
  padding: 40px 20px;
}

section {
  margin-bottom: 50px;
}

h2 {
  color: #0f172a;
  border-bottom: 2px solid #2563eb;
  padding-bottom: 8px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 18px;
}

.card {
  background: white;
  padding: 22px;
  border-radius: 10px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.08);
}

.card h3 {
  margin-top: 0;
  color: #1e3a8a;
}

.link {
  color: #2563eb;
  font-weight: bold;
}

footer {
  background: #0f172a;
  color: white;
  text-align: center;
  padding: 20px;
}