@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Poppins", sans-serif;
}
.main{
    width: 100%;
    height: 100vh;
    background: linear-gradient(rgba(0,0,0,0.7),rgba(0,0,0,0.7)),url(./lake.jpg);
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
}
.container{
   padding: 10px;
   border: 2px solid #000;
   border-radius: 16px;
   box-shadow: 0 3px 15px rgba(0,0,0,0.8);
}
.container h4{
    text-align: center;
    color: #fafafa;
    padding-bottom: 5px;
    letter-spacing: 3px;
    text-shadow: 0 0 7px #f755be;
}
input{
    width: 320px;
    padding: 24px;
    margin: 10px;
    background: rgba(255, 255, 255, 0.3);
    box-shadow: inset 0px 0px 8px rgba(163, 147, 242, 0.4);
    color: #fff;
    text-align: right;
    font-size: 40px;
    border: 2px solid rgba(0, 0, 0, 0.3);
    border-radius: 16px;
    text-shadow: 0px 1px 5px rgba(0, 0, 0, 0.2);
    background: transparent;
    
}

input::placeholder{
    color: #fff;
}
button{
    width: 60px;
    height: 60px;
    margin: 8px 11px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    text-shadow: 0px 1px 5px rgba(0, 0, 0, 0.2);
    box-sizing: -1px 2px 10px rgba(0,0,0,0.5);
    transition: all 0.5s;
}
.ac, .del{
    font-size: 20px;
}
button:hover{
    color: #fff;
    background-color: #fe02c7;
}
.operator{
    color: #fe02c7;
    font-weight: 600;
}
.equal{
    font-size: 30px;
    font-weight: 700;
    background-color: #fe02c7;
}
.equal:hover{
    background: #f67c14;
}

.made h5{
    text-align: center;
    padding-top: 10px;
    color: rgb(67, 72, 72);
    letter-spacing: 1px;
}


@media (max-width: 600px) {
    .main{
        background-repeat: no-repeat;
    }
    input{
        width: 280px;
        padding: 18px;
        margin: 10px;
        font-size: 35px;
    }
    button{
        width: 55px;
        height: 55px;
        margin: 6px 8px;
        font-size: 20px;
    }
}