body{
    margin: 0;
    padding: 0;
    background-color: rgb(32, 37, 48);
    font-family: Verdana, Tahoma, sans-serif;
    position: absolute;
    text-align: center;
    font-weight: 400;
    font-style: normal;
    bottom: 0;
    width: 100%;
    left: 0;
    right: 0;
    color: white;
    font-size: 20px;
}


.html_box {
    text-align: center;
    background-color: rgb(81, 81, 81);
    padding: 10px;
    background-attachment: fixed;
    background-image: url(Tank_img2/fuel.png); 
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
    margin-left: 38%;
    margin-right: 38%;
    /* position: relative; */
    height: 100vh;
}


.output_box {
    /* position: absolute; */
    text-align: center;
    bottom: 0;
    background-color: rgba(138, 134, 124, 0.677);
    /* width: 24.4%;
    left: 0;
    right: 0;
    color: black;
    overflow: hidden;
    left: auto;
    right: auto; */

}

.input_box {
    margin-top: 15%;
    margin-top: 100px;

}

.input_box p {
    margin: 5% 0 0 0;
    padding: 0;
}

.output_box p {
    margin: 0;
    padding: 0;
}

input {
    font-size: 15px;
    width: 45%;
    text-align: center;
    background-color: rgb(255, 244, 220)
}

button {
    background-color: rgb(255, 244, 220);
    font-size: 18px;
}






@media screen and (max-width: 1100px) {

    /* .html_box {

        text-align: center;
        background-color: rgb(81, 81, 81);
        padding: 0;
        background-attachment: fixed;
        background-image: url(Tank_img/tank1.png); 
        background-size: contain;
        background-position: center;
        background-repeat: no-repeat;
        overflow: hidden;   
        height: 100vh;
    }

    .output_box {
        position: absolute;
        text-align: center;
        bottom: 0;
        background-color: rgba(255, 244, 220, 0.677);
        width: 100%;
        left: 0;
        right: 0;
        color: black;
        overflow: hidden;
        left: auto;
        right: auto;
    
    }
    
    .input_box {
        margin-top: 15%;
    }
    
    .input_box p {
        margin: 5% 0 0 0;
        padding: 0;
    }
    
    .output_box p {
        margin: 0;
        padding: 0;
    }
    
    input {
        font-size: 15px;
        width: 45%;
        text-align: center;
        background-color: rgb(255, 244, 220)
    }
    
    button {
        background-color: rgb(255, 244, 220);
        font-size: 18px;
    } */
    .html_box {
        width: 100%;
        position: fixed;
        text-align: center;
        background-color: rgb(81, 81, 81);
        /* margin-left: 15%;
        margin-right: 15%; */
        margin: 0;
        background-attachment: fixed;
        height: 100vh; 
        background-image: url(Tank_img2/fuel.png);
        background-size: cover; 
        background-position: center;
        background-repeat: no-repeat;
        font-size: 50px;

        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 100vh;
    }

    .output_box {
        position: absolute;
        text-align: center;
        bottom: 0;
        background-color: rgba(255, 244, 220, 0.677);
        width: 100%;
        left: 0;
        right: 0;
        color: black;
        overflow: hidden;
        left: auto;
        right: auto;
    
    }

    .input_box {
        margin-top: 5%;
        margin: 2%;
    }

    p {
        margin: 10px 0 0 0;
        padding: 0;
    }
    
    input {
        font-size: 25px;
        width: 65%;
        text-align: center;
        background-color: rgb(255, 244, 220)
    }
    
    button {
        background-color: rgb(255, 244, 220);
        font-size: 25px;
  }
} 
  @media screen and (max-width: 768px) {
    .html_box {

        text-align: center;
        background-color: rgb(81, 81, 81);
        padding: 0;
        background-attachment: fixed;
        background-image: url(Tank_img2/fuel.png); 
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
        overflow: hidden;   
        height: 100vh;
        font-size: 20px;
    }

    .output_box {
        position: absolute;
        text-align: center;
        bottom: 0;
        background-color: rgba(255, 244, 220, 0.677);
        width: 100%;
        left: 0;
        right: 0;
        color: black;
        overflow: hidden;
        left: auto;
        right: auto;
    
    }
    
    .input_box {
        margin-top: 25%;
    }
    
    .input_box p {
        margin: 5% 0 0 0;
        padding: 0;
    }
    
    .output_box p {
        margin: 0;
        padding: 0;
    }
    
    input {
        font-size: 15px;
        width: 45%;
        text-align: center;
        background-color: rgb(255, 244, 220)
    }
    
    button {
        background-color: rgb(255, 244, 220);
        font-size: 18px;
    }
    
  }