body{
    text-align: center;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
    
    min-width: 615px;
}

h1{
    padding-top: 5%;
    padding-bottom: 5%;
    font-size: 100px;
    
}

label{
    font-size: 50px;
}

[id^='input']:not(#input_unit):not(#input_unit1):not(#input_unit2){
    margin-left: 36px;
    margin-bottom: 15px;
    margin-top: 15px;
    font-size: 30px;
    font-weight: bold;
    width: 50%;
}
#input_unit, #output_unit, #input_unit1, #output_unit1, #input_unit2, #output_unit2{
    width: 103px;
    margin-right: 1px;
    margin-bottom: 15px;
    margin-top: 15px;
    font-size: 30px;
    width: 200px;
}

[id^='output']:not(#output_unit):not(#output_unit1):not(#output_unit2){
    width: 50%;
    font-size: 30px;
    margin-bottom: 10px;
    margin-top: 10px;
    font-weight: bold;
    
}



.container-fluid{
    background-image:url("markus-spiske-pwpVGQ-A5qI-unsplash.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center 70%;
}
.container-fluid_1{
    background-image:url("calum-macaulay-TU1b56dfn2A-unsplash.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position:center bottom 
}
.container-fluid_2{
    background-image:url("steve-johnson-WUxwvpyJ65M-unsplash.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    background-position:center top;
}