.topic {
  background: url(../../Images/Student-02/pollution.jpg);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  color: rgb(255, 255, 255);

  margin-top: 83px;
  text-align: center;
  padding: 5.5%;
}

.side-by-side {
  display: flex;

  background: white;
  padding: 0px;
  border-radius: 15px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.side-by-side .reverse {
  flex-direction: row-reverse;
}
section {
  margin-left: 60px;
  margin-right: 60px;
  margin-top: 20px;

}
section img {
transition: transform 0.3s ease;

}

 
section img:hover {
  transform: scale(1.1);

}
.side-by-side img,
.side-by-side.reverse img {

  max-width: 40%;
  margin: 30px;
  border-radius: 15px;
  margin-right: 20px;
}
.side-by-side .description,
.side-by-side.reverse .description {
  flex: 1;
}
.side-by-side h2,
.side-by-side.reverse h2 {
  margin-top: 50px;
  margin-bottom: 20px;
  margin-left: 40px;
  text-align: left;
  font-weight: 800;
}
.side-by-side p {
  margin-left: 40px;
  margin-right: 30px;
}

.side-by-side .reverse p {
  margin-left: 40px;
  margin-right: 30px;
}

.content-nav {
  position: sticky;
  top: 83px; 
  background-color: #0077b6;
  padding: 10px 20px;
  text-align: center;
  z-index: 100;
  margin: 0; 
  justify-content: flex-end; 
}

.content-nav ul {
  list-style: none;
  display: flex;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 20px;
  margin: 0;
  padding: 0;
}

.info-highlight {
  margin: 40px 60px;
  padding: 30px;
  background-color: rgb(225, 244, 244);
  border-left: 6px solid #0077b6;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.info-highlight h2 {
  margin-bottom: 15px;
  color: #022639;
  font-size: 1.8rem;
}

.info-highlight p {
  color: #00334e;
  font-size: 1.1rem;
  max-width: 800px;
  margin: 0 auto;
}

.content-nav a {
  color: white;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s ease;
}

.content-nav a:hover {
  color: #ffcc00;
}
main h2 {
  scroll-margin-top: 140px; 
}