/* Portfolio Grid */
.portfolio-grid-section {
    padding: 4rem 0 8rem;
    background: white;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
    margin-top: 2rem;
}

.portfolio-item {
    opacity: 1;
    transform: scale(1);
    transition: all 0.5s ease;
}

.portfolio-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    aspect-ratio: 4/3;
    background: #f7fafc;
    margin-bottom: 1.5rem;
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(45, 55, 72, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all 0.3s ease;
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.05);
}

.portfolio-overlay-content {
    text-align: center;
    color: white;
    padding: 2rem;
}

.portfolio-overlay-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.portfolio-overlay-content p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    line-height: 1.5;
}

.view-project {
    background: white;
    color: #2d3748;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.view-project:hover {
    background: #f7fafc;
    transform: translateY(-2px);
}

.portfolio-info {
    padding: 1rem 0;
}

.portfolio-info h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.75rem;
    line-height: 1.3;
}

.portfolio-info p {
    color: #718096;
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.4;
}

.portfolio-cta {
    padding: 6rem 0;
    background: #f7fafc;
    text-align: center;
}

.portfolio-cta h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: #1a202c;
    letter-spacing: -0.02em;
}

.portfolio-cta p {
    font-size: 1.125rem;
    color: #718096;
    margin-bottom: 2.5rem;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.portfolio-cta .btn-primary {
    display: inline-block;
    margin-top: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .portfolio-overlay-content {
        padding: 1.5rem;
    }

    .portfolio-overlay-content h3 {
        font-size: 1.25rem;
    }

    .portfolio-cta h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .portfolio-grid-section {
        padding: 2rem 0 4rem;
    }

    .portfolio-cta h2 {
        font-size: 1.75rem;
    }
}

/* Loading states for images */
.portfolio-image img {
    background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

.portfolio-image img[src] {
    background: none;
    animation: none;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Smooth animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.portfolio-item {
    animation: fadeInUp 0.6s ease forwards;
}

/* Focus states for accessibility */
.view-project:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .portfolio-overlay,
    .portfolio-cta {
        display: none;
    }

    .portfolio-image {
        break-inside: avoid;
    }
}