body {
    margin: 0;
    padding: 0;
    min-height: 100%;
    /*background: linear-gradient(rgba(0, 0, 0, 0.1), rgba(0, 0, 0, 0.1)), url(https://kiiview.neocities.org/background-about.png);*/
    background: url(https://kiiview.neocities.org/background-about.png);
    background-size: cover;
    background-attachment: fixed;
}

.background-dark {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url(https://kiiview.neocities.org/background-about.png);  
  background-size: cover;
  background-attachment: fixed;
}

.main-container {
  margin: 100px 200px 50px 200px;
  height: 5000px;
  padding: 20px;
  background-color: rgba(0, 0, 0, 0.5);
  color: #e37100;
  font-size: 30px;
}