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

body {
  font-family: 'Poppins', sans-serif;
  background-color: #f3f4f6;
  color: #1f2937;
  line-height: 1.6;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background-color: #1e40af;
  padding: 10px 20px;
  color: white;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  height: 40px;
  margin-right: 10px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 15px;
}

.nav-links li a {
  color: white;
  text-decoration: none;
  font-weight: 600;
}

.hero {
  background: linear-gradient(to right, #3b82f6, #1e3a8a);
  color: white;
  text-align: center;
  padding: 60px 20px;
}

.hero h1 {
  font-size: 2.5em;
  margin-bottom: 10px;
}

.hero p {
  margin-bottom: 20px;
}

.btn {
  background-color: white;
  color: #1e3a8a;
  padding: 12px 24px;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
}

.sobre, .cursos {
  padding: 40px 20px;
  text-align: center;
}

.card-container {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-top: 20px;
}

.card {
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
  padding: 20px;
  width: 300px;
  text-align: left;
}

.card img {
  width: 100%;
  border-radius: 6px;
  margin-bottom: 10px;
}

footer {
  background-color: #1f2937;
  color: white;
  text-align: center;
  padding: 20px;
  margin-top: 30px;
}