@charset "utf-8";
/* CSS Document */

@charset "utf-8";
/* CSS Document */

    html, body {
      margin: 0;
      padding: 0;
      overflow-x: hidden;
      font-family: sans-serif;
      background: #f4f4f4;
    }

    #canvas {
      max-width: 100%;
      box-sizing: border-box;
    }

    .tab {
      display: flex;
      flex-wrap: wrap;
      list-style: none;
      padding: 0;
      margin: 0;
      background: #444;
    }

    .tab li {
      flex: 1 1 auto;
      text-align: center;
      margin: 2px;
    }

    .tab li a {
      display: block;
      padding: 10px;
      background: #333;
      color: #fff;
      text-decoration: none;
      border-radius: 5px;
    }

    .tab li a.current {
      background: #f90;
    }

    .btn_back {
      padding: 10px;
    }

    .tabContent {
      padding: 10px;
    }

    .tabContentItem {
      display: none;
    }

    .tabContentItem audio {
      width: 100%;
      max-width: 600px;
    }

    


   

    @media (max-width: 768px) {
      .tab li {
        flex: 1 1 100%;
      }
    }