/* Footer */
.footer {
    background-color: var(--color-bg-primary);
    border-top: var(--border-width) solid var(--color-border);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-5xl);
}

.footer .container {
    max-width: 1200px;
}

/* Footer Content */
.footer__content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-2xl);
    align-items: start;
    margin-bottom: var(--spacing-2xl);
}

/* Footer Brand */
.footer__brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.footer__logo {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: 0.05em;
    transition: color var(--duration-base) var(--ease-out);
}

.footer__logo:hover {
    color: var(--color-text-secondary);
}

.footer__tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    max-width: 300px;
}

/* Footer Links */
.footer__links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

/* Navigation Links */
.footer__nav {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    align-items: center;
}

.footer__nav-link {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-base) var(--ease-out);
    position: relative;
}

.footer__nav-link:hover {
    color: var(--color-text-primary);
}

.footer__nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-text-primary);
    transition: width var(--duration-base) var(--ease-out);
}

.footer__nav-link:hover::after {
    width: 100%;
}

/* Social Links */
.footer__social {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer__social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: transparent;
    border: var(--border-width) solid var(--color-border);
    border-radius: var(--radius-base);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-lg);
    transition: all var(--duration-base) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.footer__social-link:hover {
    background-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    border-color: var(--color-text-primary);
    transform: translateY(-2px);
}

.footer__social-link:focus {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

/* Social link SVG icons */
.footer__social-link svg {
    width: 20px;
    height: 20px;
    transition: transform var(--duration-base) var(--ease-out);
}

.footer__social-link:hover svg {
    transform: scale(1.1);
}

/* Social link image icons */
.footer__social-link img {
    width: 20px;
    height: 20px;
    transition: transform var(--duration-base) var(--ease-out);
    /* Remove filter to show original image colors */
}

.footer__social-link:hover img {
    transform: scale(1.1);
    filter: brightness(0) invert(0);
}

/* Footer Bottom */
.footer__bottom {
    padding-top: var(--spacing-lg);
    border-top: var(--border-width) solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.footer__copyright {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
}

.footer__legal {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.footer__legal-link {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-base) var(--ease-out);
}

.footer__legal-link:hover {
    color: var(--color-text-primary);
    text-decoration: underline;
}

/* Brand Assets Download */
.footer__brand-download {
    margin-top: var(--spacing-sm);
}

.footer__brand-download-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--duration-base) var(--ease-out);
}

.footer__brand-download-link:hover {
    color: var(--color-text-primary);
}

.footer__brand-download-link::before {
    content: '↓';
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
}

/* Responsive Design */
@media (max-width: 768px) {
    .footer {
        padding: var(--spacing-2xl) 0 var(--spacing-lg);
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
        text-align: center;
    }
    
    .footer__brand {
        align-items: center;
    }
    
    .footer__tagline {
        max-width: none;
    }
    
    .footer__links {
        align-items: center;
    }
    
    .footer__nav {
        justify-content: center;
        gap: var(--spacing-md);
    }
    
    .footer__social {
        justify-content: center;
    }
    
    .footer__bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .footer__legal {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .footer__nav {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .footer__social {
        gap: var(--spacing-sm);
    }
    
    .footer__social-link {
        width: 36px;
        height: 36px;
        font-size: var(--font-size-base);
    }
    
    .footer__legal {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
}

/* Tablet styles */
@media (min-width: 769px) and (max-width: 1024px) {
    .footer__content {
        gap: var(--spacing-xl);
    }
    
    .footer__nav {
        gap: var(--spacing-md);
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .footer {
        border-top-width: var(--border-width-thick);
    }
    
    .footer__social-link {
        border-width: var(--border-width-thick);
    }
    
    .footer__bottom {
        border-top-width: var(--border-width-thick);
    }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    .footer__logo,
    .footer__nav-link,
    .footer__social-link,
    .footer__legal-link,
    .footer__brand-download-link {
        transition: none;
    }
    
    .footer__nav-link::after {
        transition: none;
    }
    
    .footer__social-link:hover {
        transform: none;
    }
}

/* Print styles */
@media print {
    .footer {
        padding: var(--spacing-lg) 0;
        margin-top: var(--spacing-lg);
        border-top: 2px solid #000;
    }
    
    .footer__social {
        display: none;
    }
    
    .footer__content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer__nav-link::after {
        display: none;
    }
}

/* Dark mode preparation */
@media (prefers-color-scheme: dark) {
    /* Future dark mode styles can be added here */
}

/* Focus management for keyboard navigation */
.footer__logo:focus,
.footer__nav-link:focus,
.footer__social-link:focus,
.footer__legal-link:focus,
.footer__brand-download-link:focus {
    outline: 2px solid var(--color-text-primary);
    outline-offset: 2px;
}

/* Skip to top link (optional) */
.footer__skip-to-top {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background-color: var(--color-text-primary);
    color: var(--color-bg-primary);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    cursor: pointer;
    transition: all var(--duration-base) var(--ease-out);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    z-index: var(--z-fixed);
}

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

.footer__skip-to-top:hover {
    background-color: var(--color-text-secondary);
    transform: translateY(-2px);
}

.footer__skip-to-top::before {
    content: '↑';
}

@media (prefers-reduced-motion: reduce) {
    .footer__skip-to-top {
        transition: none;
        transform: none;
    }
    
    .footer__skip-to-top:hover {
        transform: none;
    }
}