app.css

body {
    font-family: "Source Sans Pro", sans-serif;
  }
  
  main {
    width: 100%;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
  }
  
  section {
    margin: 2rem 1rem;
  }
  
  .file-group {
    padding: 1rem;
    background: #efefef;
    border-radius: 1rem;
  }
  
  #image {
    max-width: 100%;
    width: 400px;
    height: auto;
    display: block;
    margin: auto;
  }
  
  .image-section {
    display: none;
    position: relative;
  }
  
  .image-loaded .image-section {
    display: block;
  }

  .loading .loader {
    display: block;
  }
  
  .loader {
    display: none;
  }
  
  .loading .image-section,
  .loading .file-section {
    display: none;
  }