body{
    width: 100%;
    height: 100vh;
    background: linear-gradient(90deg,blue,teal,blue);
}
header,footer{
    width: 100vw;
    height: 100px;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}
.logo{
    width: 35px;
    height: 35px;
    border-radius: 12px;
    border: 2px solid black;
    margin: 10px;
}
.container{
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}
.section{
    display: flex;
    width: 500px;
    height: 250px;
    padding: 20px;
    border: 1px solid black;
    border-radius: 12px;
    box-shadow: 0px 4px 10px rgba(3, 4, 5, 0.1);
}
main{
    flex: 3;
    max-width: 400px;
    position: relative;
}
main h3{
    margin: 5px;
}
main h2{
    border-bottom: 1px solid black;
    padding: 2px;
}
main span{
    margin: 5px;
}
.og{
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.og h1{
    margin: auto 20px;
}
.lenght ,.mass,.volume,.temp,.energy {
    width: 350px;
    height: 250px;
    padding: 10px;
    border-radius: 10px;
    /* background-color: aqua; */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
aside{
    flex: 1;
    display: flex;
    flex-direction: column;
}
select,input{
    width: 70px;
    border-radius: 5px;
}
button{
    width: 100px;
    padding: 5px 10px;
    border-radius: 15px;
    border: 1px solid black;
    margin: 5px;
}
.hide{
    display: none;
}