* {
      font-family: "sans";
      box-sizing: border-box;
    }
    
    html {
      position: relative;
      height: 100%
    }
    
    body {
      height: 100%;
      padding: 0;
      margin: 0;
      background: #333;
      color: white;
    }
    
    .app-bar {
      background-color: #FF8800;
    }
    
    nav {
      height: 56px;
      margin: 0;
      padding: 16px;
    }
    
    .app-bar h1 {
      text-align: center;
      font-family: sans;
      font-size: 45px;
      height: 72;
      paddng: 0;
      margin: 0;
    }
    
    .app-bar button {
      position: fixed;
      font-size: 20px;
      height: 24px;
      right: 16px;
      background-color: #FF8800;
      border: none;
      }
    #open-setting-screen-button {
      display: block;
    }
    
    #close-setting-screen-button {
      display: none;
    }
    
    .screen-container {
        position: fixed;
        width: 100%;
        height: calc(100vh - 56px);
        padding: 0;
        margin: 0;
    }
    
    .main-screen {
        left: 0;
        transition: all, .3s;
/*         border: 1px solid yellow; */
        }
    
    .setting-screen {
      left: 100%;
      transition: all, .3s;
/*       border: 1px solid blue; */
      
      }
      
/*     .settings-form h1 { */
/*       text-align: center; */
    }
    
    .settings-form ul {
      position: relative;
      max-width: 300px;
      height: 300px;
      list-style: none;
/*       border: 1px solid #000; */
      border-radius: 5px;
      padding: 0px;
      margin-left: auto;
      margin-right: auto;
    }
    
    .settings-form li {
      display: flex;
      padding: 0;
      padding-top: 20px;
      margin: 0;
      justify-content: center;
    }
    
    .settings-form label {
      margin-top: auto;
      margin-bottom: auto;
      width: 100px;
    }
    
    .settings-form input {
      font-size: 1em;
      width: 200px;
      border: 1px solid #7FBD32;
      border-radius: 2em;
      background-color: #EEE;
      padding: .5em;
    }
    
    .settings-form button {
      width: 100px;
      padding: .5em;
      margin-left: auto;
      margin-right: auto;
      margin-top: 20px;
/*       border: 2px solid green; */
      font-size: 1.2em;
      color: white;
      border-radius: 3em;
/*       background: #FF8800; */
      background-color: #555;
      border: 4px #7FBD32 solid;
/*       color: white; */
    }
    
    .settings-form button:active {
      background-color: green;
      width: 96px;
    }
    
    h1 {
      text-align: center;
      font-family: sans;
      font-size: 24px;
      background-color: #FF8800;
      paddng: 0;
      margin: 0;
    }

    #message-container {
      position: absolute;
      text-align: center;
      width: 100vw;
      background: #FF8800;
      bottom: 50vh;
      font-size: 2em;
      font-weight: bold;
      padding: .5em;
      display: none;
    }
    
    #button-block {
      position: absolute;
      width: 100vw;
      bottom: 0px;
    }
    
    .button-container {
      position: relative;
      display: block;
      width: 300px;
      height: 56px;
      border-radius: 56px;
      margin: 32px auto 32px auto;
      text-align: center;
      background-color: #555;
      border: 4px #7FBD32 solid;
    }
    
    .button-container:active {
      background-color: green;
      width: 290px;
    }

/*     #unlock-button:active { */
/*       background-color: green; */
/*     } */
  
    .button-icon {
      width: auto;
      height: 40px;
      position: absolute;
      display: block;
/*       margin-right: 10px; */
/*       margin-left: auto; */
/*       margin-top: 3px; */
/*       margin-bottom: auto; */
      padding: 2px;
      left: 6px;
      bottom: 4px;
      border: 1px solid white;
      border-radius: 2em;
      background-color: white;
    }
    
    .app-bar button  img {
      height: 24px;
      width: auto;
    }