body {
    margin-top: 20px;
}

.container {
    z-index: 1;
    float: left;
    margin-left: 50px;
}

.em_input {
    z-index: 1;
    font-size: 16px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    background-color: darkslategray;
    color: white;
    padding: 4px;
    width: 120px;
}

.label {
    font-size: 16px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    width: 120px;
    display: inline-block;
    margin-top: 10px;
}

#output {
    background-color: darkslategray;
    color: white;
    font-size: 16px;
    padding: 10px;
    margin-left: auto; 
    margin-right: auto; 
    display: block;
    width: 780px;
}

#canvas {
    width: 800px;
    height: 600px;
    margin-left: auto; 
    margin-right: auto; 
    display: block;
    background-color: black;
    margin-bottom: 20px;
}

[type="file"] {
    height: 0;
    overflow: hidden;
    width: 0;
    display: none;
}
  
[type="file"] + label {
    background: orangered;
    border-radius: 5px;
    color: white;
    display: none;
    font-size: 20px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;
    margin-top: 10px;
    margin-bottom: 10px;
    margin-left: auto;
    margin-right: auto;
    width: 130px;
    padding: 10px 50px;
    transition: all 0.2s;
    vertical-align: middle;
}

[type="file"] + label:hover {
    background-color: orange;
}

#update_btn {
    background: orangered;
    border-radius: 5px;
    color: white;
    font-size: 20px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    text-align: center;
    margin-top: 10px;
    padding: 6px;
    width: 200px;
    margin-left: auto;
    margin-right: auto;
}

#update_btn:hover {
    background-color: orange;
}

.ccontainer {
    display: block;
    position: relative;
    margin-top: 10px;
    cursor: pointer;
    font-size: 16px;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }
  
  .ccontainer input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
  }
  
  .checkmark {
    position: absolute;
    top: 0;
    right: 0;
    height: 25px;
    width: 25px;
    background-color: #eee;
    border: solid orangered;
  }
  
  .ccontainer:hover input ~ .checkmark {
    background-color: orange;
  }
  
  .ccontainer input:checked ~ .checkmark {
    background-color: orangered;
  }
  
  .checkmark:after {
    content: "";
    position: absolute;
    display: none;
  }
  
  .ccontainer input:checked ~ .checkmark:after {
    display: block;
  }
  
  .ccontainer .checkmark:after {
    left: 9px;
    top: 5px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 3px 3px 0;
    -webkit-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    transform: rotate(45deg);
  }
  