index.css

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
      'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
      sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
  }
  
  /* texts */
  code {
    font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
      monospace;
  }
  
  h1 {
    text-align: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(5vw, 30px);
  }
  
  p {
    text-align: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 15px);
  }
  
  a {
    text-align: center;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 15px);
  }
  
  label {
    display: inline-block;
    width: 20vw;
    text-align: right;
  }
  
  i {
    display: inline-block;
    text-align: left;
    font-size: max(1vw, 10px);
  }
  
  .option_text {
    text-align: left;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 10px);
    padding: 0px 5px;
  }
  
  .file_input {
    text-align: left;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 10px);
  
    color: transparent;
    display: inline-block;
    border-radius: 3px;
    padding: 5px 8px;
    width: 22%;
    outline: none;
    white-space: nowrap;
    -webkit-user-select: none;
    user-select: none;
    cursor: pointer;
  }
  
  .option_input {
    text-align: left;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 10px);
    width: 10vw;
  
    display: inline-block;
    outline: none;
    white-space: nowrap;
    -webkit-user-select: none;
    user-select: none;
    cursor: pointer;
  }
  
  .option_input_middle {
    text-align: left;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 10px);
    width: 6vw;
  }
  
  .option_input_short {
    text-align: left;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(1.5vw, 10px);
    width: 1.5vw;
  }
  
  .option_input_checkbox {
    width: 20px;
    height: 20px;
  }
  
  .option_list {
    padding: 2px;
    font-size: max(1.5vw, 10px);
  }
  
  .big {
    text-align: center;
    font-weight: 600;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    font-size: max(8vw, 40px);
  }
  
  .link {
    display: block;
    text-align: center;
    text-decoration: none;
    color: #1100AA;
  }
  
  .link:hover {
    display: block;
    text-align: center;
    text-decoration: none;
    color: #0008ff;
  }
  
  .small {
    text-align: left;
    font-family: 'Roboto Mono', monospace;
    font-size: max(1vw, 10px);
  }
  
  /* stage related */
  canvas {
    border: 1px solid black;
    width: auto;
    height: 72.5vh;
  }
  
  .stageholder {
    float: left;
    padding-left: 5%;
    text-align: center;
  }
  
  .tabpadding {
    padding: 0.5% 0.5%;
  }
  
  /* settings related */
  .tabcontent {
    background-color: #e5e5e5;
    margin: 4px, 4px;
    padding: 4px;
    width: 40vw;
    height: 35.1vh;
    overflow-x: hidden;
    overflow-y: auto;
    text-align: justify;
  }
  
  .controls_tab {
    float: left;
    width: 40%;
    text-align: left;
  }
  
  .settings_tab {
    float: left;
    width: 40%;
    text-align: left;
  }
  
  .exportmanager {
    text-align: left;
  }
  
  /* The switch - the box around the slider */
  .switch {
    position: relative;
    display: inline-block;
    width: 50px;
    height: 28px;
  }
  
  /* Hide default HTML checkbox */
  .switch input {
    opacity: 0;
    width: 0;
    height: 0;
  }
  
  /* The slider */
  .slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    -webkit-transition: .1s;
    transition: .1s;
  }
  
  .slider:before {
    position: absolute;
    content: "";
    height: 20px;
    width: 20px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    -webkit-transition: .1s;
    transition: .1s;
  }
  
  input:checked+.slider {
    background-color: #2196F3;
  }
  
  input:focus+.slider {
    box-shadow: 0 0 1px #2196F3;
  }
  
  input:checked+.slider:before {
    -webkit-transform: translateX(22px);
    -ms-transform: translateX(22px);
    transform: translateX(22px);
  }
  
  /* Rounded sliders */
  .slider.round {
    border-radius: 34px;
  }
  
  .slider.round:before {
    border-radius: 50%;
  }