html,body {
    height: 100%;
    font-family: Arial,Helvetica,sans-serif;
    padding: 0;
    margin: 0;
}


.calc {
    height: 7vh;
    width: 100%;
}

.calen {
    height:100%;
    width:100%;
}

iframe {
    border:0;
    width:100%;
    height:100%;

}

input {
    margin:0;
    padding:0;
    vertical-align:middle;
}

p {    
    margin:10px;
    padding:0;
    text-align:center;
    font-size:2vw;
}

.output {
    margin:10px;
    padding:10px;
}

.start {
    color: #008800;
    font-weight: bold;
}

.end {
    color: #bb0000;
    font-weight: bold;
}