#tradBackToTopButton {
display: inline-block;
background-color: #2e3192;
color: #fff;
width: 50px;
height: 50px; border-radius: 4px;
position: fixed;
bottom: 30px;
right: 30px;
transition: background-color .3s, 
opacity .5s, visibility .5s;
z-index: 1000;
opacity: 0; visibility: hidden; display: flex;
justify-content: center;
align-items: center;
}
#tradBackToTopButton:hover {
cursor: pointer;
background-color: #9230e2;
color: #fff;
}
#tradBackToTopButton:active {
background-color: #a73939;
color: #fff;
}