/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

body {
  background: #0d0d0d;
  color: #f5f5f5;
  line-height: 1.6;
}

/* Container */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
}

/* Navbar */
.navbar {
  background: #111;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo a {
  color: #ffa500;
  font-size: 20px;
  font-weight: bold;
  text-decoration: none;
}

.nav-links {
  float: right;
}

.nav-links a {
  color: #ddd;
  margin-left: 20px;
  text-decoration: none;
  font-size: 15px;
  transition: 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #ffa500;
}

/* Course Header */
.course-header {
  text-align: center;
  padding: 60px 20px 30px;
  background: #1a1a1a;
}

.course-header h1 {
  font-size: 36px;
  color: #ffa500;
  margin-bottom: 15px;
}

.course-header p {
  font-size: 18px;
  color: #ddd;
}

/* Course Overview Section */
.course-info-container {
  background: #0d0d0d;
  padding: 50px 20px;
}

.course-overview {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  align-items: flex-start;
  justify-content: center;
}

.course-image img {
  width: 100%;
  max-width: 400px;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.6);
}

.course-details {
  max-width: 600px;
  color: #eee;
  font-size: 16px;
}

/* Faculty Section */
.faculty-section {
  background: #1a1a1a;
  padding: 60px 20px;
  text-align: center;
}

.faculty-section h2 {
  color: #ffa500;
  font-size: 28px;
  margin-bottom: 40px;
}

.faculty-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #0d0d0d;
  padding: 25px;
  border-radius: 10px;
  max-width: 600px;
  margin: auto;
  box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.faculty-card img {
  width: 150px;
  height: 150px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 20px;
  border: 3px solid #ffa500;
}

.faculty-info {
  color: #ddd;
  font-size: 15px;
}

/* Course Structure */
.course-structure {
  padding: 60px 20px;
  background: #0d0d0d;
}

.course-structure h2 {
  color: #ffa500;
  font-size: 28px;
  text-align: center;
  margin-bottom: 30px;
}

#modules {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  color: #eee;
  max-width: 800px;
  margin: auto;
  font-size: 15px;
}

/* Start Button */
.start-btn {
  display: inline-block;
  margin-top: 30px;
  padding: 12px 30px;
  background: #ffa500;
  color: #000;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
  transition: background 0.3s ease;
}

.start-btn:hover {
  background: #ff8c00;
}

/* Footer */
footer {
  background: #111;
  color: #aaa;
  text-align: center;
  padding: 20px 0;
  font-size: 14px;
  margin-top: 60px;
}

/* Responsive */
@media (max-width: 768px) {
  .course-overview {
    flex-direction: column;
    align-items: center;
  }

  .nav-links {
    float: none;
    text-align: center;
    margin-top: 10px;
  }

  .nav-links a {
    display: inline-block;
    margin: 10px;
  }

  .start-btn {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }
}