html, body, footer {
  width: 100%;
  height: 100%;
  margin: 0;
  
}

body {
    background-color: black;
    color: white;
    font-family: 'Courier New',
    Courier, monospace;
}

.footer {
    height: 50px;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 2.5rem; 
    text-align: center;
}

img {
    width: 300;
    position: absolute;
    margin: auto;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

a {
    color: white;
    text-decoration: none;
  }

#mailto {
    display: flex;
    justify-content: center;
    align-items: center;
}

#mailto a {
    text-align: center;
    border: 1px solid white;
    padding: 15px;
    margin: 100;
    position: absolute;
    top: 50%;
    -ms-transform: translateY(-50%);
    transform: translateY(-50%);
}

#mailto a:hover {
    background-color: white;
    color: black;
    cursor: pointer;
}

#canvas {
    position:absolute;
    left:0;
    top:0;
    z-index:-1;
}