.site-footer {
    padding: 15px 20px;
    font-family: system-ui;
    position: relative;
}

.desktop-footer {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px,1fr));
    gap: 15px;
}

.footer-column h3 {
    margin: 0;
    padding: 0;
}

.footer-column p, .footer-column ul li a {
    margin: 3px 0;
    text-decoration: none;
    color: inherit;
}

.footer-column ul {
    list-style: none;
    padding: 0;
    margin: 5px 0 0 0;
}

.footer-column ul li {
    margin-bottom: 3px;
    transition: 0.3s;
}

.footer-column ul li a:hover {
    text-decoration: underline;
}

.mobile-footer {
    display: none;
    text-align: center;
    line-height: 1.4;
    padding: 10px 5px;
}

.footer-copyright {
    text-align: center;
    margin-top: 15px;
    font-size: 14px;
}

#backToTop {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: linear-gradient(45deg,#34d399,#10b981);
    color: #fff;
    padding: 12px 16px;
    border-radius: 50%;
    text-decoration: none;
    font-size: 20px;
    font-weight: bold;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: 0.3s;
}

#backToTop:hover {
    transform: scale(1.1);
    box-shadow:0 8px 20px rgba(0,0,0,0.4);
}

/* MOBILE FOOTER DISPLAY */
@media screen and (max-width:768px){
    .desktop-footer { display:none !important; }
    .mobile-footer { display:block !important; }
    #backToTop {
        bottom:15px;
        right:15px;
        font-size:18px;
        padding:10px 14px;
    }

    .bottom-ad-container {
        width:300px;
        height:100px;
        margin:15px auto !important;
    }
    .bottom-ad-container a, .bottom-ad-container > * {
        display:block;
        width:100%;
        height:100%;
        max-width:100%;
        max-height:100%;
    }
}