body {
    background-color: #aaa;
    background: linear-gradient(to right, #fc00ff, #00dbde);
}
#header {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    color: rgb(255, 255, 255);
}
#header_content {
    font-size:30px;
}
#header small {
    font-size: xx-small;
}
.calcArea {
    /* background: linear-gradient(135deg, rgb(3, 3, 100,0.7),#DAFF00 ); */
    background: linear-gradient(45deg, rgb(9, 39, 4,0.5), rgba(0, 0 ,255,0.5) );
    width: 400px;
    height: 410px;
    margin: 40px auto;
    border: 2px solid black;
    border-radius: 5px;
    position: relative;
}
.form {
    position: absolute;
    left: 24px;
    top: 10px;
    width: 350px ;
}
.form input {
    display: block;
    width: 100%;
    padding: 10px 5px;
    border:none;
    border-radius: 5px;
    margin-bottom: 5px;
    font:normal 15px 'Orbitron', sans-serif;
    text-align: center;
}
#operation {
    width: 20%;
    margin-left: 150px;
}
.table {
    position: absolute;
    left: 24px;
    top: 150px; /* after 200px */
    width: 350px ;
    height: 250px;
}
.table tr td {
    border:none;
    border-radius: 10px;
    background: linear-gradient(225deg,rgb(255, 255, 255),rgb(0, 0, 0, 0.5));
    font: normal bolder 25px 'Orbitron', sans-serif;
    text-align: center;
    cursor: pointer;
}
.inputfocus {
    box-shadow: 0 0 5px 5px rgb(179, 179, 179);
}
.focused {
    box-shadow: 0 0 5px 5px rgb(228, 68, 5);
    /* background: linear-gradient(to right, #0099f7, #f11712); */
}
.common {
    position: absolute;
    top: 150px;
    left: 25px;
    width: 350px;
    text-align: center;
    background: linear-gradient(45deg, rgb(9, 39, 4,0.5), rgba(0, 0 ,255,0.5) );
    border-radius:5px;
    padding: 8px 0;
    font:normal 15px 'Orbitron', sans-serif;
    overflow-x: auto;
    visibility: hidden;
}
.result {
    color: #fff; 
}
.warning {
    color: red;
    font-weight:bolder;
    background: linear-gradient(45deg, rgb(202, 202, 202), rgba(146, 146, 146, 0.5) );
}