style.css

body {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}

div#appContainer {
    display: flex;
}

div#header {
    background-color: lightblue;
    width: 10em;
    display: flex;
    flex-direction: column;
}

div#header div#instructionsContainer {
    width: 10em;
    min-height: 6em;
}

div#header div#resetContainer {
    padding-bottom: 1em;
}

div#header div.buttonsContainer {
    border-top: white 2px solid;
    padding-bottom: 1em;
}

div.logo {
    padding-top: 1em;
}

div.logo img {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

div#canvasContainer {
    width: 90vw;
    min-width: 400px;
    height: 98vh;
}

div#canvasContainer canvas {
    position: absolute;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgb(0,0,0);
    background-color: rgba(0,0,0,0.4);
}

.modalContent {
    background-color: #fefefe;
    margin: 5% auto;
    padding: 20px;
    border: 1px solid #888;
    width: 80%;
}

.modalContent img {
    max-width: 100%;
    height: auto;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
}

.close:hover,
.close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}