main{
    width: 95%;
    flex: 1;
    margin: auto;
}
.calcArea{
    width: 70%;
    max-width: 400px;
    height: fit-content;
    border: solid;
    margin: auto;
}
.inputAnswer{
    width: 100%;
    margin: auto;
}
.operManage{
    width: 99%;
    height: 4em;
    text-align: center;
    border: solid;
    white-space: pre-line;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-y: auto;
    overflow-x: auto;
    margin: auto;
}
.oper{
    width: 100%;
    font-size: 2em;
}
.answer{
    width: 99%;
    border: solid;
    background-color: #9EDF9C;
    font-size: 2em;
    display: block;
    text-align: center;
    overflow-x: auto;
}

.button{
    width: 100%;
    display: flex;
    flex-wrap: wrap;
}
.scientific, .basic{
    width: 100%;
    margin: auto;
}
.scientificButton, .basicButton{
    width: 100%;
    display: flex;
}
.basichistory{
    width: 100%;
}
.rowhis{
    width: 100%;
    height: 2em;
    text-align: center;
}
input[value="History"]{
    min-width: 245px;
    width: 100%;
    font-size: 1.5em;
    border: solid;
    cursor: pointer;
}
.row{
    width: 20%;
    height: 2em;
}
.rowB{
    width: 100%;
    height: 100%;
}
.paragraph_basic_calc{
    width: 100%;
    margin: auto;
}
.paragraph_basic_calc > p, .paragraph_basic_calc > li, .paragraph_basic_calc > h4 {
    text-align: left;
}