*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;

}

body{
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: aliceblue;
}

.container {
    position: relative;
    background-color: white;
    max-width: 300px;
    width: 100%;
    padding: 20px 20px ;
    border: 1px solid rgba(0,0,0,0.2);
    border-radius: 20px;
    background-color: black;
}
.display{
    font-size: xx-large;
    text-align: right;
    outline: none;
    border: none;
    height: 80px;
    width: 100%;
    margin-bottom: 20px;
    background-color: #d7d9dc;
    pointer-events: none;
    
}
.button{
    display: grid;
    grid-template-columns: auto auto auto auto ;
    grid-gap: 8px;
  
}

.button button{
    border: none;
    padding: 10px;
    background-color: white;
    font-size: 20px;
    cursor: pointer;
}

.button button:active{
    transform: scale(0.99);
}
.highlight{
    background-color: #f5a43b !important;
    font-weight: bolder;
    color: white;
    
}