/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: calc(var(--navbar-height) + 1px);
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--secondary-color);
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

/* Ajuste para mobile */
@media (max-width: 768px) {
    .back-to-top {
        bottom: calc(var(--navbar-height-mobile) + 1px);
        width: 35px;
        height: 35px;
        right: 15px;
    }
}

/* Footer Styles */
.footer {
    background: linear-gradient(to right, var(--dark-color), var(--darker-color));
    color: var(--light-color);
    padding: 4rem 0 2rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
}

.footer-logo {
    max-width: 180px;
    margin-bottom: 1.5rem;
    filter: brightness(0) invert(1);
    transition: transform 0.3s ease;
}

.footer-logo:hover {
    transform: scale(1.05);
}

.footer h5 {
    color: var(--light-color);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.footer h5::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 50px;
    height: 2px;
    background: var(--primary-color);
}

.footer p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--light-color);
    transition: all 0.3s ease;
}

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

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

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-block;
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 1px;
    bottom: -2px;
    left: 0;
    background-color: var(--primary-color);
    transition: width 0.3s ease;
}

.footer-links a:hover {
    color: var(--light-color);
    padding-left: 5px;
}

.footer-links a:hover::after {
    width: 100%;
}

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

.contact-info li {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.8);
}

.contact-info i {
    color: var(--primary-color);
    margin-right: 1rem;
    font-size: 1.2rem;
}

.footer hr {
    border-color: rgba(255, 255, 255, 0.1);
    margin: 2rem 0;
}

.footer .text-center p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    margin: 0;
}

/* Responsive Footer */
@media (max-width: 768px) {
    .footer {
        padding: 3rem 0 1.5rem;
    }

    .footer h5 {
        margin-top: 2rem;
    }

    .footer h5:first-child {
        margin-top: 0;
    }

    .social-links {
        justify-content: center;
    }

    .footer-links, .contact-info {
        text-align: center;
    }

    .footer-links a::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .contact-info li {
        justify-content: center;
    }
}

/* Dark Mode Adjustments */
@media (prefers-color-scheme: dark) {
    .footer {
        background: linear-gradient(to right, #1a1a1a, #2d2d2d);
    }
}