body {
	background-color: #C0C0C0;
	font-family: Cambria, Cochin, Georgia, Times, 'Times New Roman', serif;
	font-size: 18px;
	text-align: center;	
	line-height: 75%;
}
a:link {
	color: #008800;
}
a:visited {
	color: #880000;
}
a:hover {
	color: #440088;
}
.switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 34px;
}
.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}
.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #0dd;
    transition: .4s;
}
.slider:before {
    position: absolute;
    content: "";
    height: 26px;
    width: 26px;
    left: 4px;
    bottom: 4px;
    background-color: #ffd;
    transition: .4s;
}
input:checked + .slider {
    background-color: #5cf;
}
input:checked + .slider:before {
    -webkit-transform: translateX(26px);
    -ms-transform: translateX(26px);
    transform: translateX(26px);
}
th {
    text-align: left;
    padding: 5pt 0pt 5pt 0pt;
}
.variables {
    color: #555;
    border: 3pt solid black;
    border-radius: 15pt;
    padding: 5pt;
}
.units {
    font-family: monospace;
}
input {
    background-color: #555;
    color: white;
    width: 100px;
}
td {
    text-align: right;
}
.bttn {
    border: 2pt solid black;
    color: #eee;
    background-color: gray;
    border-radius: 5pt;
    padding: 5pt;
}