* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: sans-serif;
}

/* body {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: aqua;
} */

.container {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: aqua;
}

.calculator {
    width: 350px;
    height: 550px;
    background: black;
    display: flex;
    flex-direction: column;
    position: relative;
    border-radius: 20px;
    overflow: hidden;
}

.con-btn {
    width: 100%;
    height: 70%;
    position: absolute;
    margin-top: 10px;
    /* border: 2px solid red; */
    bottom: 0;
}

.display {
    width: 100%;
    height: 30%;
    position: absolute;
    /* border: 2px solid red; */
    overflow: hidden;
    font-size: 70px;
}

.dis-btn {
    padding: 50px;
    width: 100%;
    background: black;
    color: white;
    border: none;
    text-align: right;
    font-size: 50px;
}

.btn {
    width: 100%;
    height: 20%;
    /* border: 3px solid red; */
    display: flex;
    flex-direction: row;
    justify-content: center;
    justify-content: space-evenly;
}

form .btn input {
    width: 20%;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    font-size: 25px;
    background: grey;
    color: white;
    margin-bottom: 5px;
}

 form .btn input.btn00 {
    width: 45%;
    border-radius: 50px;
     margin-bottom: 5px;
}

@media only screen and (max-width: 750px) {
    body {
        scroll-behavior: ;
    }
    .calculator {
        display: flex;
       width: 100% !important;
       height: 100vh !important;
        /* position: absolute; */
        border-radius: 0;
    }
  }