button { 
    border: 0;
    line-height: 2.5;
    padding: 0 20px;
    font-size: 1rem;
    color: #fff;
    text-shadow: 1px 1px 1px #000;
    border-radius: 10px;
    background-image: linear-gradient(to top left,
                                      rgba(0, 0, 0, .2),
                                      rgba(0, 0, 0, .2) 30%,
                                      rgba(0, 0, 0, 0));
    box-shadow: inset 2px 2px 3px rgba(255, 255, 255, .6),
                inset -2px -2px 3px rgba(0, 0, 0, .6);
}

.go { background-color: rgba(0, 171, 102, 1); }
.atn { background-color: rgba(238, 210, 2, 1); }
.stop { background-color: rgba(211, 33, 45, 1); }

.go:hover { background-color: rgba(0, 207, 123, 1); }
.atn:hover { background-color: rgba(255, 226, 3, 1); }
.stop:hover { background-color: rgba(242, 39, 49, 1); }

button:active {
    box-shadow: inset -2px -2px 3px rgba(255, 255, 255, .6),
                inset 2px 2px 3px rgba(0, 0, 0, .6);
}

th.list { text-align: right; }

body { font-family: Segoe UI, Helvetica Neue, Helvetica, Lucida Grande, Arial, Ubuntu, Cantarell, Fira Sans, sans-serif; font-size: 90%; white-space: pre; }