body {
    background-color: white;
    margin: 0px;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

}

.main {
    background-color: rgb(229, 234, 239);
    padding: 20px;
    border-radius: 20px;
    box-shadow: 0 0 3px 3px rgb(172, 172, 172);
}

#title {
    color: rgb(74, 74, 74);
    text-align: center;
    margin-top: 0px;
    padding: 0px;
    font-size: 18px;
    font-family: arial;
}

#number1,
#number2 {
    width: 200px;
    height: 30px;
    margin-bottom: 10px;
    background-color: white;
    border-radius: 17px;
    border-style: solid;
    border-width: 1px;
    border-color: lightgray;
    padding-left: 10px;
    font-size: 20px;
}

input:focus,
select:focus,
button:focus,
textarea:focus {
    outline: none;
}

#dropdown {
    cursor: pointer;
    width: 50%;
    height: 30px;
    margin-bottom: 10px;
    background-color: rgb(199, 230, 251);
    border-radius: 17px;
    border-style: solid;
    border-width: 1px;
    border-color: lightgray;
    padding-left: 10px;
    font-size: 20px;
}


#calculate {
    cursor: pointer;
    width: 110px;
    height: 30px;
    margin-bottom: 10px;
    background-color: rgb(199, 230, 251);
    border-radius: 17px;
    border-style: solid;
    border-width: 1px;
    border-color: lightgray;
    padding-right: 10px;
    font-size: 20px;
}

#calculate:hover {
    background-color: rgb(205, 231, 248);
}

#calculate:active {
    background-color: rgb(215, 235, 248);
}

#display {
    width: 200px;
    height: 50px;
    margin-bottom: 0px;
    background-color: white;
    border-radius: 16px;
    border-style: solid;
    border-width: 1px;
    border-color: lightgray;
    padding-left: 10px;
    font-size: 20px;
    resize: none
}