body {
      font-family: 'Poppins', sans-serif;
      margin: 0;
      padding: 0;
    }

    .header {
      background: #0e4b8c;
      color: white;
      padding: 1rem 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .nav a {
      color: white;
      margin: 0 1rem;
      text-decoration: none;
      font-weight: 500;
    }

    .hero {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-around;
      padding: 3rem 2rem;
      background: #2c69ab;
    }

    .hero-content h1 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
      color: white;
    }

    .hero-content p {
      color: white;
    }

.btn {
  background: white;
  color: #0056d2;
  padding: 0.8rem 1.5rem;
  border: none;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 600;
}
.features {
  padding: 2rem;
  background-color: #fff;
  text-align: center;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}
.feature-box {
  background: #eef3ff;
  padding: 1rem;
  border-radius: 8px;
}
.popular-courses {
  padding: 2rem;
}
.courses-grid {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.course-card {
  background: #fff;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  flex: 1;
  min-width: 250px;
}
.course-card img {
  width: 100%;
  border-radius: 8px;
}
.footer {
  background: #222;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 2rem;
}
.btn-sm {
  background: #0056d2;
  color: white;
  padding: 0.5rem 1rem;
  display: inline-block;
  margin-top: 0.5rem;
  text-decoration: none;
  border-radius: 5px;
}