body{
	margin:0;
	padding:0;
    background-color: black;
}

canvas {
    max-width:980px;
    border: 2px solid green;
    background-color: black;
}
canvas:focus{
    outline: 1px solid green;
}
div.flexbox-container {
  flex-direction: column;
  display: flex;
  justify-content: center;
  padding: 5px;
  margin-left: auto;
  margin-right: auto;
}

div.item_1 {
  margin: 10px 30px;
  align-self: center;
}