html, body{
    margin: 0;
    padding: 0;
    height: 100%;
}

.umain{
    position: absolute;
    display: flex;
    flex-direction: column;
    gap: 50px;
    height:100%;
    width: 100%;
    padding-bottom: 1100px;
}

.main_Section{
    position: relative;
    border: 0.1px solid black;
    height: 60%;
    width: 50%;
    left: 50%;
    top: 10%;
    transform: translate(-50%, -10%);
    display: flex;
    flex-direction: column;
    gap: 0px;
    text-align: center;
}

.main_Section2{
    position: relative;
    border: 0.1px solid black;
    margin-top:2%;
    height: 60%;
    width: 50%;
    left: 50%;
    top: 10%;
    transform: translate(-50%, -10%);
    display: flex;
    flex-direction: column;
    gap: 0px;
    text-align: center;
}

.main_Section3{
    position: relative;
    border: 0.1px solid black;
    margin-top:2%;
    height: 60%;
    width: 50%;
    left: 50%;
    top: 10%;
    transform: translate(-50%, -10%);
    display: flex;
    flex-direction: column;
    gap: 0px;
    text-align: center;
}

.main_div_Information{
    position: relative;
    height: 20%;
    width: 100%;
    display: flex;
    flex-direction: row;
    border-bottom: 0.1px solid black;
    gap: 40%;
}

.main_div_Information2{
    position: relative;
    height: 20%;
    width: 100%;
    display: flex;
    flex-direction: row;
    border-bottom: 0.1px solid black;
    gap: 40%;
}

.main_div_Particles{
    position: relative;
    height: 76%;
    width: 100%;
}

.atomA{
    display: flex;
    flex-direction: column;
    gap: 0px;
    width: 30%;
    color: blue;
    padding: 20px;
    padding-top: 0px;
}

.atomA p{
    margin:3px;
}

.atomB{
    display: flex;
    flex-direction: column;
    gap: 0px;
    width: 30%;
    padding-left: 20px;
    color: red;
}

.atomB p{
    margin: 3px;
}

.ballA{
    display: flex;
    flex-direction: column;
    gap: 0px;
    width: 100%;
    color: blue;
    padding: 20px;
    padding-top: 0px;
}

.ballA p{
    margin: 3px;
}

.main_div_Rectangle{
    position: relative;
    height: 76%;
    width: 100%;
}

.main_div_GravityBall{
    position: relative;
    height: 76%;
    width: 100%;
}