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

/* Hero Section */
.hero {
  display: flex;
  flex-wrap: wrap;
  background-color: #1a2a44;
  color: #fff;
  padding: 50px 30px;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  font-size: 2.8rem;
  margin-bottom: 10px;
}

.hero-text p {
  font-size: 1.2rem;
}

.hero-image img {
  max-width: 400px;
}

/* Course Section */
.course-section {
  display: flex;
  padding: 40px 20px;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
  background: #fff;
}

.sidebar {
  flex: 0 0 200px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar button {
  padding: 12px;
  background: #f1f1f1;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

.sidebar .active {
  background: #222;
  color: #fff;
}

/* Course Cards */
.course-cards {
  flex: 1;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  background: #fff;
  border: 1px solid #eee;
  border-radius: 10px;
  width: 250px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

.card img {
  max-width: 100%;
  height: 100px;
 
}

.card h3 {
  font-size: 1.1rem;
  margin: 15px 0 10px;
}

.price {
  color: #007bff;
  font-weight: bold;
}

.view-btn {
  display: inline-block;
  margin-top: 10px;
  background: red;
  color: white;
  padding: 8px 16px;
  text-decoration: none;
  border-radius: 5px;
}

/* WhatsApp Button */
.whatsapp-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #25D366;
  color: #fff;
  padding: 12px 20px;
  border-radius: 30px;
  text-decoration: none;
  font-weight: bold;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}