app.css

body {
    margin: auto;
    padding: auto;
    line-height: 0.5;
    background-color: rgb(179,0,255);
    background: linear-gradient(-90deg, rgba(179,0,255,1) 5%, rgba(231,0,255,1) 50%, rgba(255,0,254,1) 95%); 
    background-size: 200% 100%;
    animation: color 3s linear infinite;
    font-family: sans-serif;
}

@keyframes color {
    0% {
        background-position: 100% 50%;
    }
    50% {
        background-position: 0 50%;
    }
    100% {
        background-position: 100% 50%;
    }
}

.calci {
    max-width: 110%; /* Increase the max-width to 110% */
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-55%, -55%); /* Increase the translation values to -55% */
}


#zero{
height: 55;
width: 116;
font-size: 20;
font-family: sans-serif;
font-weight: 300;
}

#display {
    background: rgb(15, 15, 15);
    border: none;
    border-radius: 2rem;
    width: 245px; /* Added "px" for width and height values */
    font-size: 20px; /* Added "px" for font size */
    font-family: sans-serif;
    font-weight: 300;
    height: 60px; /* Added "px" for height value */
    margin: auto;
    color: rgb(255, 255, 255);
    box-shadow: 0 0 7px rgba(0, 0, 0, 0.5);
    padding: 15px; /* Adjust the padding as needed */
}

.button{
    width: 55;
    height: 55;
    font-size: 20;
    color: rgb(255, 255, 255);
    background: rgb(15, 15, 15);
    font-family: sans-serif;
    font-weight: 300;
    border:0;
    border-radius: 30px;
    margin: 1.5;
    box-shadow: 0 0 7px rgba(0,0,0,0.5);
}

.button:active {
    transform: scale(1.1); /* Add a scaling effect when the button is pressed */
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.7); /* Adjust box shadow for the press effect */
}

h1{
    margin-top: 300px;
    margin-left: 100px;
    font-family: sans-serif;
    font-size:50;
    text-decoration: underline;
    color: white;
    text-transform: uppercase;
    font-weight: 700;
}

h2{

    color: white;
    margin-top: -1px;
    font-family: sans-serif;
    margin-left: 438px;
}
.operator{
    width: 55;
    height: 55;
    font-size: 20;
    text-align: center;
    color: rgb(255, 255, 255);
    border: none;
    background: rgb(15, 15, 15);
    font-family: sans-serif;
    font-weight: 500;
    border:0;
    border-radius: 30px;
    margin: 1.5;
    cursor:pointer;
    box-shadow: 0 0 7px rgba(0,0,0,0.5);
}

.operator:active {
    transform: scale(1.1); /* Add a scaling effect when the button is pressed */
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.7); /* Adjust box shadow for the press effect */
}

.operator:hover{
    background-color: rgb(179,0,255);
    background: linear-gradient(90deg, rgba(179,0,255,1) 5%, rgba(231,0,255,1) 50%, rgba(255,0,254,1) 95%);
    box-shadow: 0 0 9px rgba(0,0,0,0.75);
}