body{
    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;
    margin: 0;
    background: linear-gradient(to right bottom , rgb(64, 64, 182),rgb(0, 132, 255));
    color: #000;
    display: flex;
    align-items: center;
    justify-content: space-around;
    min-height: 100vh;
}
.calc-container {
    width: 400px;
    padding: 10px;
    background: rgba(255,255,255,0.2);
}
.calc-container table {
    border-collapse: collapse;
    width: 100%;
    text-align: center;
}
.calc-container table tr td,
.calc-container table tr th {
    width: 25%;
    border: 5px solid transparent;
    background: rgba(255,255,255,0.3);
    background-clip:padding-box ;
    padding: 20px 10px;
    font-size: 20px;
    font-weight: 700;
    cursor: pointer;
    color: #fff;
    transition: all 0.3s ease-out;
    position: relative;
}
.calc-container table tr th {
    background: rgba(255,255,255,0.8);
    text-align: right;
    background-clip: padding-box;
    font-size: 30px;
    padding: 25px 10px;
    color: #444;
    cursor: default;

}
.calc-container table tr td:hover {
background:rgba(255,255,255,0.5);
background-clip: padding-box;
color: #666;

}
.symble {
    pointer-events: none;
}