calculator.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');
*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins',sans-serif;
}

body {
    background-color:#e3f2fd;
    display: flex;
    justify-content: center;
    
}


.container{
    display: flex;
    justify-content: space-between;
    width: 1100px;
    margin: 0px;
    
  }

  #box1{
    width: 500px;
    margin-top:120px;
    padding: 30px;
    border-radius: 7px;
  }

  #btn{
    background-color: white;
    /* color: rgb(156, 224, 241); */
    border: none;
    width: 185px;
    display: flex;
    justify-content: space-evenly;
    margin-top: 20px;
  }

#main_box {
    height: 550px;
    width: 390px;
    margin-top: 100px;
    border-radius: 10px;
    background-color: white;
    box-shadow: 0 0 10px 5px rgba(0,0,0,0.3);
    padding: 20px;
}

.button-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 15px;
    
}

button {
    width: 75px;
    height: 60px;
    font-size: 23px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    background-color:white;
    box-shadow: 0 0 3px 3px rgba(0,0,0,0.15);
   
}

button:hover {
    background-color: #e3f2fd;
}

#display {
    width: 100%;
    height: 70px;
    font-size: 24px;
    padding: 0px;
    border: none;
    background-color: white;
    border-radius: 5px;
    margin-bottom: 20px;
    margin-top: 20px;
    box-shadow: 0 0 3px 3px rgba(0,0,0,0.1);
    text-align: center;
}


.header{
    height: 40px;
    text-align: center;
    margin: 0px;
}
#logo{
    margin-left: 10px;
}


@media (max-width: 910px) {
    .container {
        flex-direction: column;
       
    }

    #box1 {
        width: 65%;
        margin-top: 0px;
        margin-left: 12%;
    }

    #main_box {
        height: 550px;
        width: 390px;
        margin-top: 20px;
        margin-left: 15%;
        margin-bottom: 50px;
    }

    .button-row {
       display: flex;
       justify-content: space-between;
    }

    button {
        width: 70px;
        height: 60px;
        font-size: 20px;
        margin: 2px;
    }

    #display {
        font-size: 20px;
        height: 60px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1px;
        align-items: center;
    }

    #box1 {
        width: 100%;
        margin-top: 10px;
    }

    #main_box {
        width: 100%;
        margin-top: 10px;
    }

    .button-row {
        flex-direction: row;
        align-items: center;
    }

    button {
        width: 70px;
        height: 50px;
        font-size: 18px;
        margin: 2px 0;
    }

    #display {
        font-size: 18px;
        height: 50px;
    }
}

@media (max-width: 1140px){
    #main_box{
        margin-right: 30px;
    }
}