/* footer.css */
.footer {
    background-color: var(--primary-navy);
    color: var(--white);
    position: relative;
}

/* Footer Principal */
.footer-main {
    padding: var(--spacing-2xl) 0;
    position: relative;
    overflow: hidden;
}

.footer-main::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 20%, rgba(0, 177, 235, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 177, 235, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: var(--spacing-2xl);
    position: relative;
}

/* Branding */
.footer-brand {
    padding-right: var(--spacing-xl);
}

.footer-logo {
    height: 65px;
    margin-bottom: var(--spacing-lg);
}

.brand-description {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

/* Enlaces */
.footer-links h3 {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.footer-links h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-blue);
}

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

.footer-links ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
}

.footer-links ul li a::before {
    content: '→';
    margin-right: var(--spacing-sm);
    opacity: 0;
    transform: translateX(-10px);
    transition: all var(--transition-normal);
}

.footer-links ul li a:hover {
    color: var(--white);
    padding-left: var(--spacing-sm);
}

.footer-links ul li a:hover::before {
    opacity: 1;
    transform: translateX(0);
}

/* Información de Contacto */
.footer-contact h3 {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.footer-contact h3::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 40px;
    height: 2px;
    background: var(--primary-blue);
}

.contact-info {
    list-style: none;
    padding: 0;
    margin: 0;
}

.contact-info li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.contact-info li i {
    color: var(--primary-blue);
    font-size: 1.25rem;
    margin-top: 4px;
}

.contact-info li div span {
    display: block;
    color: var(--white);
    font-weight: 500;
    margin-bottom: 2px;
}

.contact-info li div p {
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
}

/* Redes Sociales */
.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-normal);
}

.social-link:hover {
    background: var(--primary-blue);
    transform: translateY(-5px);
}

/* Certificaciones */
.footer-certifications {
    padding: var(--spacing-xl) 0;
    background: rgba(255, 255, 255, 0.02);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.certifications-grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-2xl);
}

.certification-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.certification-item img {
    height: 60px;
    opacity: 0.8;
    transition: all var(--transition-normal);
}

.certification-item:hover img {
    opacity: 1;
    transform: scale(1.1);
}

.certification-item span {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

/* Footer Bottom */
.footer-bottom {
    padding: var(--spacing-lg) 0;
    background: rgba(0, 0, 0, 0.2);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.copyright {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
}

.legal-links {
    display: flex;
    gap: var(--spacing-lg);
}

.legal-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all var(--transition-normal);
}

.legal-links a:hover {
    color: var(--white);
}

/* Scroll to Top Button */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: 100;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    background: var(--primary-navy);
    transform: translateY(-5px);
}

/* Responsive */
@media (max-width: 1200px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }

    .footer-contact {
        grid-column: span 3;
    }
}

@media (max-width: 992px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-xl);
    }

    .footer-brand {
        grid-column: span 2;
    }

    .footer-contact {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }

    .footer-brand,
    .footer-contact {
        grid-column: span 1;
    }

    .certifications-grid {
        flex-direction: column;
        gap: var(--spacing-xl);
    }

    .footer-bottom-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .legal-links {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* ---------------------------------------------------------------
   Botón flotante de WhatsApp (no tenía estilos definidos)
   --------------------------------------------------------------- */
.whatsapp-btn {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 900;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #25D366;
    color: #fff;
    font-size: 1.7rem;
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.4);
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.whatsapp-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 8px 26px rgba(37, 211, 102, 0.55);
    color: #fff;
}

.whatsapp-btn i {
    line-height: 1;
}

/* El botón "volver arriba" se coloca encima para no solaparse */
.scroll-top-btn {
    bottom: 88px;
}

@media (max-width: 768px) {
    .whatsapp-btn {
        right: 16px;
        bottom: 16px;
        width: 52px;
        height: 52px;
        font-size: 1.55rem;
    }

    .scroll-top-btn {
        bottom: 80px;
    }
}