/* Footer Styles */
.site-footer {
    background: #000;
    color: #fff;
    padding: 0;
    margin-top: 60px;
}

/* Top Section */
.footer-top {
    padding: 48px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-top-content {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer-feedback h3 {
    font-size: 32px;
    font-weight: 700;
    margin: 0 0 16px 0;
    color: #fff;
}

.footer-feedback p {
    font-size: 16px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    margin: 0 0 24px 0;
}

.footer-feedback-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #fff;
    color: #000;
    padding: 14px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.3s ease;
}

.footer-feedback-btn:hover {
    background: #f3f4f6;
    transform: translateY(-2px);
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
}

.footer-contact-item .icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.footer-contact-item .material-icons {
    font-size: 24px;
}

.footer-contact-item strong {
    font-weight: 600;
    margin-right: 8px;
}

.footer-social {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-social-link {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: #fff;
    transition: all 0.3s ease;
}

.footer-social-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.footer-social-link img {
    width: 24px;
    height: 24px;
    object-fit: contain;
}

/* Bottom Section */
.footer-bottom {
    padding: 48px 0 32px;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 40px;
    margin-bottom: 48px;
}

.footer-column h4 {
    font-size: 16px;
    font-weight: 700;
    margin: 0 0 20px 0;
    color: #fff;
    text-transform: uppercase;
}

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

.footer-column ul li {
    margin-bottom: 12px;
}

.footer-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-column ul li a:hover {
    color: #fff;
}

.footer-address {
    font-size: 14px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 12px;
}

.footer-address strong {
    color: #fff;
    display: block;
    margin-bottom: 4px;
}

/* Footer Legal */
.footer-legal {
    padding: 32px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.footer-legal-left {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
}

.back-to-top {
    width: 48px;
    height: 48px;
    background: #0b5ed7;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.back-to-top:hover {
    background: #0a58ca;
    transform: translateY(-2px);
}

.footer-copyright {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-certifications {
    display: flex;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}

.footer-cert-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
}

.footer-cert-item img {
    height: 32px;
    width: auto;
}

.footer-zalo-hotline {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 16px;
    border-radius: 24px;
    color: #fff;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s ease;
}

.footer-zalo-hotline:hover {
    background: rgba(255, 255, 255, 0.2);
}

.footer-zalo-hotline .icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Responsive */
@media (max-width: 1200px) {
    .footer-columns {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .footer-top-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-columns {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .footer-top {
        padding: 32px 0;
    }
    
    .footer-feedback h3 {
        font-size: 24px;
    }
    
    .footer-bottom {
        padding: 32px 0 24px;
    }
    
    .footer-columns {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-legal {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-certifications {
        flex-direction: column;
        align-items: flex-start;
    }
}