body{margin:0;font-family:Arial,sans-serif}main{position:relative;width:100%}canvas{display:block}button,select{font:14px Arial;padding:5px;background:white;color:#203348;border:1px solid slategray;border-radius:3px}button:focus-visible,select:focus-visible{outline:3px solid darkorange}button:disabled{opacity:.55}