/* Base styles */
body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  color: #333;
  background-color: #f5f5f5;
}

/* Header styles */
header {
  background-color: #4285F4;
  color: white;
  padding: 40px 20px;
  text-align: center;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header h1 {
  margin: 0;
  font-size: 2.5em;
  font-weight: 500;
  letter-spacing: -0.5px;
}

/* Navigation styles */
nav {
  background-color: white;
  padding: 15px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Main content styles */
main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

/* Section styles */
section {
  margin-bottom: 60px;
  background-color: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Heading styles */
h2 {
  font-size: 2em;
  font-weight: 500;
  color: #1a73e8;
  border-bottom: 3px solid #4285F4;
  padding-bottom: 0.5em;
  margin-bottom: 30px;
  letter-spacing: -0.5px;
}

/* Course card styles */
.course {
  background-color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 25px;
  margin-bottom: 20px;
  border-radius: 8px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.course h3 {
  margin-top: 0;
  margin-bottom: 15px;
  font-size: 1.4em;
  color: #202124;
}

/* Course meta information */
.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 15px;
  font-size: 0.9em;
  color: #5f6368;
}

.course-meta span {
  display: inline-flex;
  align-items: center;
  background-color: #f8f9fa;
  padding: 5px 10px;
  border-radius: 4px;
  transition: background-color 0.2s ease;
}

.course-meta span:hover {
  background-color: #e8eaed;
}

.course-meta i {
  margin-right: 5px;
}

/* Icon colors */
.course-meta .fa-clock {
  color: #34a853;  /* Google Green */
}

.course-meta .fa-signal {
  color: #4285f4;  /* Google Blue */
}

.course-meta .fa-tag {
  color: #ea4335;  /* Google Red */
}

.course-meta .fa-star {
  color: #fbbc04;  /* Google Yellow */
}

/* Rating styles */
.rating {
  font-weight: 500;
}

/* Highlights section */
.highlights {
  background-color: #f8f9fe;
  padding: 15px;
  border-radius: 4px;
  margin: 15px 0;
}

.highlights h4 {
  margin-top: 0;
  margin-bottom: 10px;
  color: #1a73e8;
  font-size: 1.1em;
}

.highlights ul {
  margin: 0;
  padding-left: 20px;
}

.highlights li {
  margin-bottom: 5px;
  color: #5f6368;
}

/* Link styles */
a {
  color: #1a73e8;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #4285F4;
  text-decoration: underline;
}

/* Footer styles */
footer {
  background-color: white;
  color: #5f6368;
  text-align: center;
  padding: 20px;
  box-shadow: 0 -2px 4px rgba(0,0,0,0.1);
}

/* Highlight style */
.highlight {
  background-color: #f8f9fe;
  border-left: 4px solid #4285F4;
}

/* Responsive design */
@media (max-width: 768px) {
  main {
    padding: 20px 10px;
  }
  
  section {
    padding: 20px;
  }
  
  .course {
    padding: 20px;
  }
  
  h2 {
    font-size: 1.8em;
  }
  
  .course h3 {
    font-size: 1.3em;
  }
  
  .course-meta {
    flex-direction: column;
    gap: 10px;
  }
  
  .highlights {
    padding: 12px;
  }
}