style.css

*{
    margin: 0%;
    padding: 0%;
    box-sizing: border-box;
    background-color: white;
    font-family: sans-serif;
    outline: none;
}

.container{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: black;
    background-image: url(rain.jpg);
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
}

.calculator{
    background-color: #ffffff10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 15px;
    border-radius: 30px;
    box-shadow: inset 5px 5px 12px #ffffff10
                      5px 5px 12px rgba(0, 0, 0, 16);
    display: grid;
    grid-template-columns: repeat(4, 68px);
}

input{
    grid-column: span 4;
    height: 70px;
    width: 260px;
    background-color: #ffffff10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: inset -5px -5px 12px black
                inset 5px 5px 12px rgba(0, 0, 0, 16);
    border-color: black;
    border: none;
    border-radius: 30px;
    color: black;
    font-size: 50px;
    text-align: end;
    margin-top: 40px;
    margin: auto;
    margin-bottom: 30px;
    padding: 20px; 
    ;
}


button{
    height: 48px;
    width: 48px;
    background-color: #ffffff10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: -5px -5px 12px, black
                 5px 5px 12px ;
    border: none;
    border-radius: 50%;
    margin: 8px;
    font-size: 16px;
}

.equal{
    width: 115px;
    border-radius: 40px;
    background-color: #ffffff10;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: -5px -5px 12px,
                 5px 5px 12px rgba(0, 0, 0, 16);
}