.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    background: rgba(59, 130, 246, 0.2);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: var(--color-light);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s var(--cubic-bezier);
    backdrop-filter: blur(10px);
    z-index: 100;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: rgba(59, 130, 246, 0.3);
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.4);
}

.back-to-top-icon {
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.back-to-top:hover .back-to-top-icon {
    transform: translateY(-3px);
}