/* Dark Premium Footer Styles */

.dark-premium-footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-glow);
    margin-top: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.footer-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.footer-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    animation: glow-pulse 3s ease-in-out infinite;
}

@keyframes glow-pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.8; }
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    position: relative;
    z-index: 1;
}

.footer-main {
    padding: var(--spacing-2xl) 0 var(--spacing-xl);
}

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

/* 회사 정보 */
.footer-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.company-logo {
    margin-bottom: var(--spacing-md);
}

.footer-logo {
    height: 45px;
    width: auto;
    object-fit: contain;
    filter: brightness(1.2);
}

.company-details p {
    margin: 0 0 var(--spacing-xs) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.company-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    text-shadow: 0 0 10px var(--primary-color);
}

/* 푸터 메뉴 */
.footer-menu {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.menu-section h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.menu-section h4::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 0 5px var(--primary-color);
}

.menu-section ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.menu-section li {
    margin-bottom: var(--spacing-sm);
}

.menu-section a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    position: relative;
}

.menu-section a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--primary-color);
}

.menu-section a::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 1px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

.menu-section a:hover::before {
    width: 5px;
}

/* 소셜 미디어 */
.footer-social h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.footer-social h4::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 30px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 0 5px var(--primary-color);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 45px;
    height: 45px;
    background: var(--bg-glass);
    color: var(--text-secondary);
    border: 1px solid var(--border-glow);
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.social-link::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s ease;
}

.social-link:hover::before {
    left: 100%;
}

.neon-social {
    background: linear-gradient(135deg, var(--bg-glass), var(--bg-card));
    border: 1px solid var(--border-glow);
    box-shadow: 0 0 10px rgba(0, 212, 255, 0.2);
}

.neon-social:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: var(--bg-primary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.5);
}

/* 푸터 하단 */
.footer-bottom {
    border-top: 1px solid var(--border-glow);
    padding: var(--spacing-lg) 0;
    position: relative;
}

.footer-bottom::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary-color), transparent);
    opacity: 0.5;
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

.powered-by {
    color: var(--text-light);
    font-size: 0.75rem;
    margin: 0;
}

.powered-by a {
    color: var(--text-light);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
}

.powered-by a:hover {
    color: var(--primary-color);
    text-shadow: 0 0 5px var(--primary-color);
}

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

.powered-by a:hover::after {
    width: 100%;
}

/* 반응형 디자인 */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .footer-menu {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .footer-bottom-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .social-links {
        justify-content: center;
    }
    
    .menu-section h4::after,
    .footer-social h4::after {
        width: 20px;
    }
}

@media (max-width: 480px) {
    .footer-container {
        padding: 0 var(--spacing-sm);
    }
    
    .footer-main {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }
    
    .footer-bottom {
        padding: var(--spacing-md) 0;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .social-link {
        width: 40px;
        height: 40px;
    }
}