body{
    margin: 0;
    padding: 0;
    height: 900px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.outer{
    width: 300px;
    height: 400px;
    background-color: skyblue;
    margin: 10px;
    border-radius: 10px;
    box-shadow: 4px 4px 25px rgba(0, 0, 0, 0.7);
    opacity: 0.899;
}

.screen input[type="text"] {
    display: inline-block;
    margin: 10px;
    width: 89%;
    height: 75px;
    border-radius: 10px;
    background-color: #ffffff9f;
    color: blueviolet;
    text-shadow: 2px 2px 20px blue;
    font-size: 36px;
    font-weight: bold;
    text-align: right;
    padding-right: 10px;
    text-wrap: wrap;
}

.keys{
    display: flex;
    flex-wrap: wrap;
    width: 100%;
    justify-content: space-around;
    margin: 20px 0px 10px 0px;
}

.keys button{
    width: 19%;
    height: 50px;
    border: none;
    border-radius: 5px;
    margin: 8px;
    color: black;
    background-color: white;
    font-size: 24px;
    text-align: center;
    cursor: pointer;
    box-shadow: 2px 2px 4px greenyellow;
}

.white{
    color: black; 
    background-color: whitesmoke;
}

#black{
    color: white; background-color: rgb(19, 18, 18);
}

#red{
    color: white; background-color: red; font-weight: bold;
}

#white:hover{
    color: black;
    box-shadow: 2px 2px 20px red;
}

#black:hover,#red:hover{
    color: white;
    box-shadow: 2px 2px 20px blue;
}

#white:active,#red:active,#black:active{
    box-shadow: 2px 2px 40px red;
}

h1{
    text-align: center;
    margin: 20px 0px 10px 0px;
    font-size: 250px;
    color: blueviolet;
    text-shadow: 10px 10px 50px blue;
    position: absolute;
    opacity: 0.99;
    z-index: -1;
}

h2{
    position: absolute;
    bottom: 0;
    right: 100px;
    text-shadow: 2px 2px 4px lightgreen;
    font-size: 30px;
    z-index: 1;
}