/* ===================================
   Footer Component - Styles
   =================================== */

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Hidden Social Links (SEO용, 화면에 표시되지 않음) */
.footer-social-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

.footer-social-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: var(--spacing-sm);
}

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

.footer-social-links a {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text);
    text-decoration: none;
}

/* Footer */
.footer {
    position: relative;
    z-index: 1;
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

.footer .container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Footer Content */
.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

/* Footer Brand */
.footer-main {
    display: flex;
    flex-direction: column;
}

.footer-brand-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.footer-brand-title i {
    font-size: 1.75rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-brand-desc {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    max-width: 400px;
}

/* Footer Links Grid */
.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-column {
    display: flex;
    flex-direction: column;
}

.footer-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links li {
    margin: 0;
}

.footer-links a {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
    padding: var(--spacing-xs) 0;
}

.footer-links a:hover {
    color: var(--color-primary-light);
    padding-left: var(--spacing-xs);
}

/* Footer Bottom */
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.footer-copyright p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0;
}

.footer-legal {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-legal-link {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-fast);
}

.footer-legal-link:hover {
    color: var(--color-primary-light);
}

.footer-separator {
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* AdSense Notice */
.footer-adsense-notice {
    padding: var(--spacing-md);
    background: rgba(99, 102, 241, 0.05);
    border: 1px solid rgba(99, 102, 241, 0.2);
    border-radius: var(--radius-lg);
}

.adsense-notice-text {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    margin: 0;
    text-align: center;
    justify-content: center;
}

.adsense-notice-text i {
    font-size: 1rem;
    color: var(--color-primary-light);
}

/* Responsive */
@media (max-width: 1024px) {
    .footer-links-grid {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .footer-legal {
        width: 100%;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .footer {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    
    .footer-links-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .footer-brand-desc {
        max-width: 100%;
    }
    
    .footer-title {
        font-size: 0.875rem;
        margin-bottom: var(--spacing-xs);
    }
    
    .footer-links a {
        font-size: 0.8125rem;
    }
}