/* ===================================
   PORTFOLIO SECTION STYLES
   =================================== */

.portfolio {
    padding: var(--spacing-5xl) 0;
    background: var(--white);
    position: relative;
    overflow: hidden;
}

.portfolio::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.02) 0%, 
        rgba(0, 212, 255, 0.01) 50%,
        rgba(0, 102, 204, 0.02) 100%);
    pointer-events: none;
}

/* Portfolio Filters */
.portfolio-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-4xl);
    padding: 0 var(--spacing-md);
}

.filter-btn {
    background: var(--white);
    color: var(--gray-dark);
    border: 2px solid var(--gray-light);
    border-radius: var(--radius-full);
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: var(--fs-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.filter-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(0, 102, 204, 0.1) 50%, 
        transparent 100%);
    transition: left var(--transition-normal);
}

.filter-btn:hover::before {
    left: 100%;
}

.filter-btn:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.filter-btn.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-lg);
}

.filter-btn.active:hover {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-color) 100%);
    transform: translateY(-2px);
}

/* Portfolio Grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-4xl);
    position: relative;
    z-index: 2;
}

/* Portfolio Item */
.portfolio-item {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    position: relative;
    border: 1px solid rgba(0, 102, 204, 0.1);
}

.portfolio-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: rgba(0, 102, 204, 0.2);
}

/* Portfolio Image Container */
.portfolio-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: var(--gray-light);
}

.portfolio-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.portfolio-item:hover .portfolio-image img {
    transform: scale(1.1);
}

/* Portfolio Overlay */
.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.9) 0%, 
        rgba(0, 212, 255, 0.8) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: all var(--transition-normal);
    backdrop-filter: blur(5px);
}

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

.portfolio-overlay::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-slow);
}

.portfolio-item:hover .portfolio-overlay::before {
    width: 300%;
    height: 300%;
}

/* Portfolio Content in Overlay */
.portfolio-content {
    text-align: center;
    color: var(--white);
    padding: var(--spacing-lg);
    position: relative;
    z-index: 3;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.portfolio-item:hover .portfolio-content {
    transform: translateY(0);
}

.portfolio-content h3 {
    font-size: var(--fs-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    color: var(--white);
}

.portfolio-content p {
    font-size: var(--fs-base);
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
    color: var(--white);
}

/* Portfolio Link */
.portfolio-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.2);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-full);
    color: var(--white);
    text-decoration: none;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.portfolio-link:hover {
    background: var(--white);
    color: var(--primary-color);
    transform: scale(1.1);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.3);
}

.portfolio-link i {
    font-size: var(--fs-lg);
}

/* Portfolio Info (Below Image) */
.portfolio-info {
    padding: var(--spacing-lg);
    background: var(--white);
}

.portfolio-category {
    display: inline-block;
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.1) 0%, 
        rgba(0, 212, 255, 0.1) 100%);
    color: var(--primary-color);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: var(--fs-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-sm);
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.portfolio-info h4 {
    font-size: var(--fs-xl);
    font-weight: 700;
    color: var(--dark-color);
    margin: 0;
    line-height: 1.3;
}

/* Portfolio CTA */
.portfolio-cta {
    text-align: center;
    margin-top: var(--spacing-3xl);
    position: relative;
    z-index: 2;
}

/* Portfolio Loading States */
.portfolio-item.loading {
    pointer-events: none;
    opacity: 0.7;
}

.portfolio-item.loading .portfolio-image {
    background: linear-gradient(90deg, 
        var(--gray-light) 25%, 
        var(--white) 50%, 
        var(--gray-light) 75%);
    background-size: 200% 100%;
    animation: loading-shimmer 1.5s infinite;
}

.portfolio-item.loading .portfolio-info h4,
.portfolio-item.loading .portfolio-category {
    background: var(--gray-light);
    color: transparent;
    border-radius: var(--radius-sm);
}

/* Filter Animation */
.portfolio-item.hidden {
    opacity: 0;
    transform: scale(0.8);
    pointer-events: none;
}

.portfolio-item.visible {
    opacity: 1;
    transform: scale(1);
    pointer-events: auto;
}

/* Portfolio Modal (if needed) */
.portfolio-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.portfolio-modal.active {
    opacity: 1;
    visibility: visible;
}

.portfolio-modal-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    max-width: 90%;
    max-height: 90%;
    overflow-y: auto;
    position: relative;
    transform: scale(0.8);
    transition: transform var(--transition-normal);
}

.portfolio-modal.active .portfolio-modal-content {
    transform: scale(1);
}

.portfolio-modal-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: var(--radius-full);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: all var(--transition-fast);
}

.portfolio-modal-close:hover {
    background: var(--primary-color);
    transform: scale(1.1);
}

/* Portfolio Statistics */
.portfolio-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-4xl) 0;
    padding: var(--spacing-2xl);
    background: linear-gradient(135deg, 
        rgba(0, 102, 204, 0.05) 0%, 
        rgba(0, 212, 255, 0.05) 100%);
    border-radius: var(--radius-xl);
    border: 1px solid rgba(0, 102, 204, 0.1);
}

.portfolio-stat {
    text-align: center;
}

.portfolio-stat-number {
    font-size: var(--fs-4xl);
    font-weight: 800;
    color: var(--primary-color);
    display: block;
    margin-bottom: var(--spacing-xs);
}

.portfolio-stat-label {
    font-size: var(--fs-base);
    color: var(--gray-dark);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .portfolio-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: var(--spacing-xl);
    }
    
    .portfolio-image {
        height: 220px;
    }
    
    .portfolio-content h3 {
        font-size: var(--fs-xl);
    }
}

@media (max-width: 768px) {
    .portfolio {
        padding: var(--spacing-4xl) 0;
    }
    
    .portfolio-filters {
        gap: var(--spacing-sm);
        margin-bottom: var(--spacing-2xl);
    }
    
    .filter-btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--fs-sm);
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .portfolio-image {
        height: 200px;
    }
    
    .portfolio-content {
        padding: var(--spacing-md);
    }
    
    .portfolio-content h3 {
        font-size: var(--fs-lg);
        margin-bottom: var(--spacing-xs);
    }
    
    .portfolio-content p {
        font-size: var(--fs-sm);
        margin-bottom: var(--spacing-md);
    }
    
    .portfolio-link {
        width: 40px;
        height: 40px;
    }
    
    .portfolio-link i {
        font-size: var(--fs-base);
    }
    
    .portfolio-info {
        padding: var(--spacing-md);
    }
    
    .portfolio-info h4 {
        font-size: var(--fs-lg);
    }
    
    .portfolio-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
        padding: var(--spacing-lg);
    }
    
    .portfolio-stat-number {
        font-size: var(--fs-3xl);
    }
    
    .portfolio-stat-label {
        font-size: var(--fs-sm);
    }
}

@media (max-width: 480px) {
    .portfolio-filters {
        flex-direction: column;
        align-items: center;
    }
    
    .filter-btn {
        width: 200px;
        text-align: center;
    }
    
    .portfolio-image {
        height: 180px;
    }
    
    .portfolio-stats {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
    }
    
    .portfolio-modal-content {
        max-width: 95%;
        margin: var(--spacing-md);
    }
}

/* Animation Keyframes */
@keyframes loading-shimmer {
    0% { background-position: -200px 0; }
    100% { background-position: calc(200px + 100%) 0; }
}

@keyframes portfolio-fade-in {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* AOS Animation Override */
.portfolio-item[data-aos="fade-up"] {
    transform: translateY(30px);
    opacity: 0;
}

.portfolio-item[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
    opacity: 1;
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .portfolio-item {
        border: 2px solid var(--dark-color);
    }
    
    .portfolio-overlay {
        background: rgba(0, 0, 0, 0.9);
    }
    
    .filter-btn {
        border: 2px solid var(--dark-color);
    }
    
    .filter-btn.active {
        background: var(--dark-color);
        border-color: var(--dark-color);
    }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .portfolio-item,
    .portfolio-image img,
    .portfolio-overlay,
    .portfolio-content,
    .portfolio-link,
    .filter-btn {
        transition: none;
        animation: none;
    }
    
    .portfolio-item:hover {
        transform: none;
    }
    
    .portfolio-item:hover .portfolio-image img {
        transform: none;
    }
    
    .portfolio-overlay::before {
        display: none;
    }
}

/* Print Styles */
@media print {
    .portfolio {
        background: var(--white);
        padding: var(--spacing-xl) 0;
    }
    
    .portfolio-filters,
    .portfolio-overlay,
    .portfolio-modal {
        display: none;
    }
    
    .portfolio-grid {
        display: block;
    }
    
    .portfolio-item {
        break-inside: avoid;
        margin-bottom: var(--spacing-lg);
        box-shadow: none;
        border: 1px solid var(--gray-light);
    }
    
    .portfolio-image {
        height: auto;
    }
    
    .portfolio-image img {
        width: 100%;
        height: auto;
    }
}