.footer {
    background: var(--bg-primary);
    border-top: var(--border-glass);
    margin-top: var(--spacing-xxl);
    position: relative;
    overflow: hidden;
}
.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--gradient-primary);
    opacity: 0.5;
}
.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    padding: var(--spacing-xl) 0;
    align-items: start;
}
.footer-logo .logo-text {
    font-family: var(--font-tech);
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}
.footer-logo p {
    color: var(--text-secondary);
    font-size: var(--fs-body);
    margin: 0;
}
.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-lg);
}
.footer-section h4 {
    font-family: var(--font-tech);
    font-size: var(--fs-h4);
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
.footer-section li {
    margin-bottom: var(--spacing-sm);
}
.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: all var(--transition-normal);
    position: relative;
    display: inline-block;
    padding: var(--spacing-xs) 0;
}
.footer-section a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-normal);
}
.footer-section a:hover {
    color: var(--accent-primary);
    transform: translateX(5px);
}
.footer-section a:hover::before {
    width: 100%;
}
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}
.footer-copyright p,
.footer-credits p {
    margin: 0;
    color: var(--text-muted);
    font-size: var(--fs-small);
}
.footer-credits .heart {
    color: var(--accent-secondary);
    animation: heartbeat 2s ease-in-out infinite;
}
@keyframes heartbeat {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.2); }
}
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
    box-shadow: var(--shadow-card);
    display: flex;
    align-items: center;
    justify-content: center;
}
.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.back-to-top:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-heavy);
}
.back-to-top::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.2));
    opacity: 0;
    transition: opacity var(--transition-normal);
}
.back-to-top:hover::before {
    opacity: 1;
}
.footer-section {
    animation: fadeInUp 0.8s ease-out;
}
.footer-section:nth-child(2) {
    animation-delay: 0.2s;
}
.footer-section:nth-child(3) {
    animation-delay: 0.4s;
}
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }
    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }
}
@media (max-width: 480px) {
    .footer {
        margin-top: var(--spacing-xl);
    }
    .footer-content {
        padding: var(--spacing-lg) 0;
    }
    .footer-logo .logo-text {
        font-size: 1.8rem;
    }
    .footer-section h4 {
        font-size: 1rem;
    }
    .back-to-top {
        width: 40px;
        height: 40px;
        font-size: 1rem;
        bottom: 15px;
        right: 15px;
    }
}
@media print {
    .footer {
        background: white;
        color: black;
        border-top: 2px solid black;
    }
    .footer-section a {
        color: black;
        text-decoration: underline;
    }
    .back-to-top {
        display: none;
    }
}
@media (prefers-contrast: high) {
    .footer {
        background: #000;
        border-top: 2px solid #fff;
    }
    .footer-section a {
        color: #fff;
        font-weight: bold;
    }
    .footer-section a:hover {
        background: #fff;
        color: #000;
    }
}