.mainBox {
    /* border:3px solid red; */
    position: relative;
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
}

/* code for decorative circle  */
.circle {
    background-color: #476ef7;
    width: 750px;
    height: 750px;
    border-radius: 50%;
    position: absolute;
    right: -375px;
    top: -10px;
    z-index: 1;
}

.topHead {
    /* border:2px solid red; */
    display: flex;
    justify-content: space-between;
    position: absolute;
    width: 100%;
    z-index: 2;
    top: 30px;
    padding: 0px 30px;
}

/* header button  */
#clickButton {
    color: #476ef7;
    background-color: white;
    font-weight: 600;
}

/* middle part  */
.middlePart {
    /* border:2px solid red; */
    margin-left: 70px;
}

#name {
    /* border:2px solid red; */
    font-size: 100px;
    color: #476ef7;
}

/* login button  */
#loginButton {
    color: white;
    background-color: #476ef7;
    font-weight: 600;
}

/* responsive  */

@media only screen and (max-width:768px) {
    .circle {
        width: 300px;
        height: 300px;
        right: -150px;
        top: -100px;
        z-index: 1;
    }

    .topHead {
        top: 60px;
        gap: 20px;
    }
    .topHead h3{
        font-size:1.8rem;
    }
    #clickButton {
        display:none;
    }
    #loginButton{
        padding:10px 40px;
        margin-top:30px;
    }
    .form-floating{
        box-shadow:0 0 10px black;
        border-radius:10px;
        margin-top:30px;
    }

}