body { font-size: xx-large; }

input.jfButtonGo { background-color: green; color: white; font-size: 100%; text-align: left; width: 100%; margin-bottom: 20px; padding: 20px; box-sizing: border-box; border: none; }
input.jfButtonStop { background-color: red; color: white; font-size: 100%; text-align: left; width: 100%; margin-bottom: 20px; padding: 20px; box-sizing: border-box; border: none; }