*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
    font-weight: bold;
}
body{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-image: url(https://tse2.mm.bing.net/th/id/OIP.-2ZR5tXOA1M-tBBQ1n30OQHaE7?pid=Api&P=0&h=220);
    background-size: cover;

}
.calculator{
    padding: 20px;
    border: 2px solid black;
    border-radius: 16px;
    box-shadow: 0 3px 15px rgb(0,0,0.8);
    background: rgba(0,0,0,0.5);
}
input{
    width: 320px;
    padding: 24px;
    margin: 10px;
    background: rgba(255, 255, 255, 0.3);
    box-shadow: inset rgba(0,0,0,0.4);
    font-size: 65px ;
    text-align: right;
    color: #fff;
    border: solid 2px rgba(0,0,0,0.3);
    border-radius: 16px;

}
input::placeholder{
    color: #fff;
}
button{
    width: 60px;
    height: 60px;
    margin: 10px;
    color: white;
    background-color: rgba(0,0,0,0.7);
    font-size: 24px;
    cursor: pointer;
    border: solid 1px rgba(255, 255, 255, 0.2);
    border-radius: 25px;



}
.ac,.del{
    font-size: 20px;
}
button:hover{
    color: #fff;
    background-color: #f67c14;
}
.equalbtn{
    background-color: #f67c14;
}
.operator{
    color: #f67c14;
}