body {
  font-family: Arial, sans-serif;
  color: #333;
  background-color: #f4f4f9;
  margin: 0;
  padding: 0;
}

h2 {
  color: #555;
  font-size: 2em;
}

a {
  color: #0077cc;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.intro, audio, img {
  max-width: 800px;
  margin: auto;
  text-align: center;
}

.intro p {
  margin: 0.5em 0;
}

.rounded-image {
  border-radius: 20px; 
  max-width: 90%;    
  height: auto;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.15); 
}

@media (max-width: 768px) {
  h2 {
    font-size: 1.5em;
  }
  img {
    width: 100%;
    height: auto;
  }
}

#backToTop {
  display: none;
  position: fixed;
  bottom: 20px;
  right: 30px;
  z-index: 99;
  font-size: 18px;
  border: none;
  outline: none;
  background-color: #0077cc;
  color: white;
  cursor: pointer;
  padding: 10px 15px;
  border-radius: 4px;
}

#backToTop:hover {
  background-color: #555;
}