/* ===== FOOTER ===== */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 4rem 0 2rem;
    position: relative;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-section h3 {
    color: var(--white);
    margin-bottom: 1.5rem;
    font-size: 1.2rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-section h3 i {
    color: var(--primary-color);
}

.footer-section p {
    color: var(--gray-400);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.footer-links i {
    width: 16px;
    color: var(--primary-color);
}

.footer-contact {
    list-style: none;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--gray-400);
}

.footer-contact i {
    color: var(--primary-color);
    width: 20px;
    text-align: center;
}

.footer-social {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--gray-800);
    color: var(--gray-400);
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--gray-800);
    padding-top: 2rem;
    text-align: center;
    color: var(--gray-500);
    font-size: 0.9rem;
}

.footer-bottom a {
    color: var(--primary-color);
    text-decoration: none;
}

.footer-bottom a:hover {
    text-decoration: underline;
}

.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: 1000;
    box-shadow: var(--shadow-lg);
    -webkit-tap-highlight-color: transparent;
}

@media (max-width: 767px) {
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .footer-content {
        position: relative;
    }

    .footer-content::after {
        content: '';
        position: absolute;
        right: 0;
        top: 0;
        bottom: 0;
        width: 30px;
        background: linear-gradient(to right, transparent, var(--gray-900));
        pointer-events: none;
        opacity: 0.8;
    }

    .footer-section {
        position: relative;
    }

    .footer-section::after {
        content: '';
        position: absolute;
        bottom: -1rem;
        left: 1rem;
        right: 1rem;
        height: 2px;
        background: var(--primary-color);
        opacity: 0.2;
    }
}

@media (max-width: 479px) {
    .back-to-top {
        bottom: 15px;
        right: 15px;
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }

    .footer-content::after {
        width: 25px;
    }

    .footer-section::after {
        left: 0.75rem;
        right: 0.75rem;
        height: 1px;
    }
}

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

.back-to-top:hover {
    background: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}