body {
  font-family: Arial, sans-serif;
  background-color: #1a1a1a;
  color: #f0f0f0;
  margin: 0;
  padding: 20px;
  line-height: 1.6;
}

main {
  max-width: 800px;
  margin: 0 auto;
  background: #2c2c2c;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.5);
}

h1 {
  text-align: center;
  color: #ffcc00;
  margin-bottom: 20px;
}

section {
  margin-bottom: 25px;
}

h2 {
  color: #ffcc00;
  margin-bottom: 10px;
}

audio, video {
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  outline: none;
}

#transcript {
  background: #3a3a3a;
  padding: 15px;
  border-radius: 6px;
  transition: background 0.3s;
}

#transcript.highlight {
  background: #505050;
}