.container{
    
    display: flex;
    justify-content: center;
    margin-top:150px;
}
.container1{
    height: 550px;
    width: 450px;
    background-color: aqua;
    border: solid black;
    border-radius: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    
}
.screen{
    height: 150px;
    width:350px;
    background-color:lightgray;
    border: solid black;
    margin-top: 50px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.OpNum{
    display: flex;
    margin-top: 30px;
    flex-direction: column;
    gap: 20px;
        
}
body{
    font-size: 30px;
}
.operators{
    display: flex;
    gap: 10px;
}
.numbers{
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

button{
    border-radius: 8px;
    height: 30px;
    width: 55px;
    transition-duration: 0.3s;
    border: solid white;

}
button:hover{
    background-color: red;
    color: white;
}
button:active {
    background-color: red;
    box-shadow: 0 5px #666;
    transform: translateY(4px);
  }
.clear{
    display: flex;
    justify-content: center;
}
.clearbtn{
    border-radius: 50%;
    height: 50px;
    width: 100px;
    background-color: blue;
    color: white;
    
}
.lower{
    display: flex;
    justify-content: center;
    gap: 10px;

}
.undobtn{
    height: 150px;
    width: 55px;
    background-color: black;
    color: white;

}

footer{
    background-color: gray;
    
    color: white;
    text-align: center;
    margin-top: 50px;
}