.canvas_div{

  width: 80%;
  height: 100%;
  display: inline-block;
  float:left;
  position: relative;

}

html,body{

  padding: 0px;
  margin: 0px;
  font-family: Arial !important;

}

.options_div{

  width: calc(20% - 20px);
  height: calc(100% - 20px);
  padding: 10px;
  background-color: #aaaaee;
  display: inline-block;
  position: relative;

}

.main_input{

  width: calc(100% - 20px);
  padding: 10px;
  border-radius: 5px;
  margin-bottom: 10px;
  border: 1px solid #cccccc;

}
.sub_div{

  margin-bottom: 10px;
  border: 2px solid #666666;
  border-radius: 2px;
  width: 100px;
  height: 100px;

}

.main_button{

  padding: 10px;
  background-color: #f7f7f7;
  border: 1px solid #bbbbbb;
  border-radius: 5px;

}