temp.css

* {
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    font-family: 'Poppins', sans-serif;
}

.box {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
    text-align: center;
    background-color: rgb(0, 2, 2);
}

#calcTemp {
    padding: 29px 67px;
    min-height: 290px;
    background-color: #cdd8fd;
    box-shadow: rgba(0, 0, 0, 0.12) 0px 1px 3px, rgba(0, 0, 0, 0.24) ;
}


label {
    font-size: 30px;
    line-height: 78px;
}

#temp {
    width: 110px;
    height: 34px;
    border-radius: 5px;
    margin: 12px;
    padding: 8px;
    font-size: 20px;
    font-weight: 500;
    border: none;
    outline: none;
}

#tempdiff {
    width: 120px;
    height: 34px;
    border-radius: 5px;
    margin: 12px;
    font-size: 18px;
    font-weight: 500;
    border: none;
    outline: none;
}

#submit {
    width: 100px;
    border-radius: 4px;
    margin: 30px 0 20px 0;
    font-size: 18px;
    /* background-color: rgb(38, 33, 33); */
    padding: 5px;
    transition: all 0.5s ease;
}

#submit:hover{
    color: rgb(217, 15, 15);
    cursor: pointer;
}

#result{
    font-size: 27px;
}