#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(180deg, #464db0, #b953ac); /* gradient background */
    color: #fff;
    padding: 10px 15px;
    font-size: 24px;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    z-index: 9999;
    display: none;
    transition: background 0.3s, transform 0.3s;
}

#back-to-top:hover {
    background: linear-gradient(180deg, #b953ac, #464db0);; /* darker gradient on hover */
    transform: scale(1.1); /* slight grow effect on hover */
}