scroll top btn visibility

[ashum9]

modified code

.scrolltop {
position: fixed;
right: 1rem;
bottom: 1.5rem;
display: flex;
justify-content: center;
align-items: center;
padding: .6rem;
background: rgba(6,156,84,.8);
border-radius: .4rem;
z-index: var(--z-tooltip);
transition: .3s ease-in-out;
visibility: visible;
opacity: 0;
}

.show-scroll {
opacity: 1;
}