style.css

h1, h2 {
  font-family: "Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana, sans-serif;
  font-weight: 700;
  font-style: normal;
  font-size: 60px;
  margin-left: -3px;
  margin-bottom: 0px;
  line-height: 1;
  letter-spacing: -0.04em;
}

h2 {
  font-size: 30px;
}

#author {
  text-align: center;
  font-style: italic;
  font-size: 15px;
  margin-top: 100px;
  font-family: "Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana,sans-serif;
  padding-top: 50px;
  border-top: 1px solid #555;
}

.content {
  width: 700px;
  margin: auto;
  padding-left: 10px;
  font-family: Georgia,Cambria,"Times New Roman",Times,serif;
  letter-spacing: 0.01rem;
  font-weight: 400;
  font-style: normal;
  font-size: 20px;
  line-height: 1.5;
  margin-top: 30px;
  margin-bottom: 150px;
}

.content > p {
  margin-left: 30px;
}

.img {
  margin-top: 20px;
  width: 450px;
  margin-left: auto;
  margin-right: auto;
  display: block;
}

.live-demo {
  margin-left: auto;
  margin-right: auto;
  width: 650px;
}

.live-demo-cam, .live-demo-video {
  width: 950px;
}

.data-note {
  background-color: rgba(0, 0, 255, 0.11);
  padding-top: 3px;
  padding-bottom: 3px;
  padding-left: 4px;
  padding-right: 4px;
  border-radius: 4px;
}

.data-note:hover {
  box-shadow: 0px 0px 1px #888 inset;
}

.spectrogram {
  border: 1px solid #000;
  background-color: #000;
}

#spectrogram2, #spectrogram3, #spectrogram4 {
  cursor: pointer;
}

.audiofy {
  margin-left: 55px;
}

#cam1, #cam2, #cam3 {
  cursor: pointer;
}

.button {
  font-family: "Lucida Grande","Lucida Sans Unicode","Lucida Sans",Geneva,Verdana, sans-serif;
}

#activate {
  text-align: center;
  margin-bottom: 10px;
}

.demo {
  width: 400px;
  margin: auto;
  padding-top: 50px;
}