/* --- Premium Footer Styles --- */
.premium-footer {
    position: relative;
    padding: 100px 0 40px;
    background: var(--bg-light);
    border-top: 1px solid rgba(109, 40, 217, 0.1);
    overflow: hidden;
    transition: background 0.5s ease;
}

[data-theme="dark"] .premium-footer {
    background: #080414;
    border-color: rgba(109, 40, 217, 0.2);
}

/* Footer Ambient */
.footer-ambient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.footer-glow {
    position: absolute;
    top: -150px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 300px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.08) 0%, transparent 70%);
    filter: blur(60px);
}

/* Footer Layout */
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr repeat(3, 1fr);
    gap: 60px;
    position: relative;
    z-index: 2;
}

/* Brand Section */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.footer-brand .nav-brand {
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}

[data-theme="dark"] .footer-brand .brand-text {
    color: var(--text-primary-dark);
}

.footer-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    max-width: 300px;
}

.footer-socials {
    display: flex;
    gap: 16px;
    margin-top: 10px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(109, 40, 217, 0.05);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 1.2rem;
    transition: all 0.3s ease;
    text-decoration: none;
}

[data-theme="light"] .social-link {
    color: #0f172a;
    background: rgba(0, 0, 0, 0.05);
}

.social-link:hover {
    background: var(--primary-violet);
    color: white;
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 5px 15px rgba(109, 40, 217, 0.3);
}

/* Navigation Columns */
.footer-col-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary-light);
    margin-bottom: 24px;
}

[data-theme="dark"] .footer-col-title {
    color: var(--text-primary-dark);
}

.footer-links {
    list-style: none;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.footer-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.95rem;
    transition: all 0.3s ease;
    display: inline-block;
}

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

/* Bottom Line */
.footer-bottom {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 2;
}

[data-theme="dark"] .footer-bottom {
    border-color: rgba(255, 255, 255, 0.05);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 1024px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 40px;
    }
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 0;
    }
    .footer-brand {
        margin-bottom: 40px;
    }
    .footer-col {
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    }
    [data-theme="dark"] .footer-col {
        border-color: rgba(255, 255, 255, 0.05);
    }
    .footer-col-title {
        margin-bottom: 0;
        padding: 20px 0;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    .footer-col-title::after {
        content: '+';
        font-size: 1.5rem;
        font-weight: 400;
        transition: transform 0.3s ease;
    }
    .footer-col.active .footer-col-title::after {
        transform: rotate(45deg);
    }
    .footer-links {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        gap: 10px;
    }
    .footer-col.active .footer-links {
        max-height: 200px;
        padding-bottom: 20px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
        margin-top: 40px;
    }
}