body{
    margin: 0;
    background-image: url(/asserts/images/backgroud-img.jpg);

    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50% ,-50%);
}
.main-container{
    width: 30rem;
    height: 22rem;
    background-color: black;     
    padding: 1rem;
    opacity: 0.7;
}
.head-container{
    display: flex;
    justify-content: center;
    align-items: center;
}
#clear-btn{
    height: 3rem;
    width: 3rem;
    background-color: red;
    font-size: 1rem;
    font-weight: 800;
    color: white;
    margin-right: 0.5rem;
    border-radius: 10%;
}
#input-text{
    height: 3rem;
    width: 35rem;
    border-radius: 0.2rem;
    font-size: 1.5rem;
    color: white;
    font-weight: 600;
    text-align: end;
    padding-right: 0.5rem;
}
.button-container{
    display: grid;
    grid-template-columns: repeat(4 ,1fr);
    gap: 0.5rem;
    position: relative;
    top: 45%;
    left: 50%;
    transform: translate(-50% ,-50%);
}
.button{
    height: 4rem;
    background-color: white;
    display: flex;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem; 
    box-shadow: 0rem 0.1rem 0.2rem gray;
}
.button:hover{
    background-color: blueviolet;
}
.button-function{
    background-color: blanchedalmond;
}
.button-equal{
    background-color: aquamarine;  
}
.button-equal:hover{
    background-color: rgb(189, 181, 67);
}