body {
    padding: 0; margin: 0; height: 1500;
    background: #00C9FF;  /* fallback for old browsers */
    background: -webkit-linear-gradient(to left, #92FE9D, #00C9FF);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to left, #92FE9D, #00C9FF); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

#header {
    padding-left: 80px;
    background: hsl(193, 100%, 50%);  /* fallback for old browsers */
    background: -webkit-linear-gradient(to left, #92FE9D, #00C9FF);  /* Chrome 10-25, Safari 5.1-6 */
    background: linear-gradient(to left, #92FE9D, #00C9FF); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */

}

#panel1 {
    height: 500px;
    padding: 0px;
    padding: 30px;
}

#panel2 {
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 10px;
    border: 2px solid black;
}
    
#tabb {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#section1 {
    margin-bottom: 100px;
}

#section2 {
    margin-left: 30px;
    margin-right: 30px;
}

#btncaldR {
    height:50px;
    font-size: 20px;
    margin-left: 15px;
    margin-right: 15px;
}

#dR {
    border: 2px solid black; 
    height: 43px; 
    margin-left: -15px; 
    padding-top: 5px; 
    padding-left: 10px;
}

#btnplot {
    height:50px;
    font-size: 20px;
    margin-left: 15px;
    margin-right: 15px;
}

#footer {
    background-color: cadetblue;
    text-align: center;
    height: 60px;
    margin-top: 50px;
    border-top: 3px solid black;
    text-align: right;
    padding-top: 10px;
    padding-right: 20px;
    color: white;
}

#voltmeter {
    position: absolute;
    top: 8.4%;
    left: 33.2%;
    height: 23%;
    width:14%;
    background-color: white;
}

#zenerDiode {
    position: absolute;
    top: 30.2%;
    left: 36.1%;
    height: 23%;
    width:13.5%;
    background-color: white;
    /* border: 2px solid black; */
}
#btn {

    border: 4px solid black;
    border-radius: 20px;
    margin: 3%;
    background-color: white;
    width:80%;
    height: 50px;
    align-items: center;
    justify-content: center;
    margin-left: 10%;
    font-size: 20px;
}
#ammeter {
    position: absolute;
    top: 27.3%;
    left: 55.1%;
    height: 23%;
    width:12.5%;
    background-color: white;
    /* border: 2px solid black;  */
}

#loadR {
    position: absolute;
    top: 42.3%;
    left: 72.2%;
    height: 20%;
    width:21.4%;
    background-color: white;
    /* border: 2px solid black; */
}

#graph {
    visibility: hidden;
    padding-left: 8%;
}