.back-to-top {
    position: fixed;
    bottom: 30px;
    left: 30px;
    width: 50px;
    height: 50px;
    border-radius: 8px;
    background-color: var(--text-color-secondary, #1D64D8);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
}


.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-color-dark, #1650AD);
    transform: translateY(-3px);
}

.back-to-top:active {
    transform: translateY(0);
}