styles.css

*{
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
    font-family: 'Lobster', cursive;
}

body {
    font-family: sans-serif;
    font-size: 25px;
    width: 100%;
    min-height: 100vh ;
    background-color: #9c9592;
}

.headerContainer {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: center;
    margin-bottom: 100px;
}

.container{
    width: 100%;
    display: flex;
    justify-content:center ;
    align-items: center;
    flex-direction: column;
}

.display {
    display: flex;
    background: conic-gradient(#d7d7d7, #c3c3c3, #cccccc, #c6c6c6,
                                #d7d7d7, #c3c3c3, #cccccc, #c6c6c6,
                                 #d7d7d7, #c3c3c3, #cccccc, #c6c6c6,
                                  #d7d7d7, #c3c3c3, #cccccc, #c6c6c6);                             
    flex-direction: column;
    justify-content: space-evenly;
    align-items: center;
    width: 400px;
    height: 600px;
    flex-wrap: wrap;
    border: 2px solid gold;
    filter: drop-shadow(0 0 1rem black);   
    border-radius: 20px;
}

.screen {
    display: flex;
    background-color: antiquewhite;
    border: 3px rgb(204, 174, 2) solid;
    align-items: center;
    justify-content: center;
    width: 300px;
    height: 100px;  
    border-radius: 15px;  
    font-size: 50px;
}

.row-one ,.row-two, .row-three , .row-four{
    display: flex;
    width: 350px;
    justify-content: space-evenly;
}

#equal {
    width: 170px;
}

button{
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    border-radius: 50px;
    width: 60px;
    height: 60px;
    border-color: gold;
    background:conic-gradient( #e6e9bf, #d2b5aa, #cbaea3, #d4b5ab,
                                 #e6e9bf, #d2b5aa, #cbaea3, #d4b5ab,
                                    #e6e9bf, #d2b5aa, #cbaea3, #d4b5ab,
                                        #e6e9bf, #d2b5aa, #cbaea3, #d4b5ab);
    color: black;
    font-size: 35px;
    font-weight : bold;
    box-shadow: -10px 8px 20px rgba(0,0,0,0.5) 

}

.key {
    transition: all 0.07 ;
}

.pressed {
    transform: scale(0.9);
    border-color: gold; 
    box-shadow: -3px 8px 20px rgba(0,0,0,0.5)
}

.footer {
   margin-top: 80px;
}