style.css

body {
    font-family: "Arial";
    font-size: 16px;
    margin-top: 0;
    margin-left: 0;
    margin-right: 0;
}

.control-panel {
    padding: 10px;
    width: 100%;
    align: center;
}

.desc {
    color: slategrey;
    font-size: 14px;
    vertical-align: bottom;
}
div.params{
    background-color: gainsboro;
    margin: 5px;
    padding: 10px;
    text-align: center;
    border-left: 5px solid white;
    border-radius: 10px;
    display: table-cell;
}

button {
    width: 100px;
    padding: 3px;
    text-align: center;
    font-size: 15px;
    margin: 5px;
}

span.title {
    font-size: 28px;
    text-align: center;
    display: block;
    color: darkslateblue;
    margin-right: 50px;
    margin-left: 50px;
    margin-bottom: 20px;
}

input, label, select {
    margin: 3px;
}

select {
    margin-left: 13px;
    width: 79px;
    padding: 1px;
}
#canvas {
    padding: 10px;
}