#scroll-to-top-btn {
display: none;
position: fixed;
bottom: 30px;
right: 30px;
z-index: 80;
border: none;
outline: none;
background-color: #E78C0B;
color: white;
cursor: pointer;
border-radius: 50%;
width: 60px;
height: 60px;
font-size: 24px;
transition: opacity 0.3s, visibility 0.3s, transform .3s linear;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}
#scroll-to-top-btn:hover {
transform: scale(1.13);
}
.arrow-up {
display: inline-block;
font-weight: bold;
}