:root {
    /* Colors */
    --primary: #6366f1;
    --primary-light: #818cf8;
    --primary-dark: #4f46e5;
    --dark: #0f172a;
    --dark-alt: #1e293b;
    --light: #f8fafc;
    --light-muted: #cbd5e1;
    --light-accent: #94a3b8;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #0ea5e9;
    --secondary: #8b5cf6;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.2);
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    --category-card-height: 300px;
    --portfolio-card-height: 420px;
    --modal-width: 900px;
}

.portfolio-hero,
.categories-section,
.projects-section,
.portfolio-cta {
    position: relative;
    overflow: hidden;
}

.hero-particles {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-gradient {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, transparent 70%);
    z-index: 1;
}

.position-relative.z-3 {
    position: relative;
    z-index: 3;
}

.portfolio-hero {
    background: linear-gradient(135deg, var(--dark), #1e1b4b);
    padding: var(--space-2xl) 0;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(99, 102, 241, 0.15);
    border: 1px solid rgba(99, 102, 241, 0.3);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    backdrop-filter: blur(5px);
    margin-bottom: var(--space-md);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--light);
    margin-bottom: var(--space-md);
    line-height: 1.2;
}

.text-gradient-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-text {
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 600px;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-lg);
    padding: var(--space-md) 0;
}

.stat-item {
    text-align: center;
    min-width: 100px;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--light-accent);
    font-size: 0.9rem;
    font-weight: 500;
}

.code-card {
    background: var(--dark-alt);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-xl);
}

.code-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl), 0 0 40px rgba(99, 102, 241, 0.2);
}

.code-header {
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    background: linear-gradient(135deg, #1e293b, #0f172a);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.code-dots {
    display: flex;
    gap: 0.5rem;
    margin-right: var(--space-sm);
}

.code-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-filename {
    color: var(--light-accent);
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
}

.code-body {
    padding: var(--space-md);
}

.code-image-wrapper {
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
}

.code-image-wrapper::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), transparent);
    z-index: 1;
}

.code-img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.code-card:hover .code-img {
    transform: scale(1.05);
}

.categories-section {
    background: var(--dark-alt);
}

.category-card {
    height: var(--category-card-height);
}

.category-card-inner {
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.category-card:hover .category-card-inner {
    transform: translateY(-10px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-xl);
}

.category-image {
    height: 160px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

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

.category-card:hover .category-img {
    transform: scale(1.1);
}

.category-overlay {
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.8) 100%);
    opacity: 0;
    transition: opacity var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-card:hover .category-overlay {
    opacity: 1;
}

.category-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    transform: translateY(20px);
    transition: all var(--transition-normal);
}

.category-icon-primary { background: rgba(99, 102, 241, 0.2); color: var(--primary); border: 2px solid rgba(99, 102, 241, 0.4); }
.category-icon-success { background: rgba(16, 185, 129, 0.2); color: var(--success); border: 2px solid rgba(16, 185, 129, 0.4); }
.category-icon-info { background: rgba(14, 165, 233, 0.2); color: var(--info); border: 2px solid rgba(14, 165, 233, 0.4); }
.category-icon-warning { background: rgba(245, 158, 11, 0.2); color: var(--warning); border: 2px solid rgba(245, 158, 11, 0.4); }
.category-icon-danger { background: rgba(239, 68, 68, 0.2); color: var(--danger); border: 2px solid rgba(239, 68, 68, 0.4); }
.category-icon-secondary { background: rgba(139, 92, 246, 0.2); color: var(--secondary); border: 2px solid rgba(139, 92, 246, 0.4); }

.category-card:hover .category-icon {
    transform: translateY(0) rotate(360deg);
}

.category-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.category-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--light);
}

.category-description {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--light-accent);
    flex-grow: 1;
}

.category-meta {
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    margin-top: auto;
}

.category-count {
    font-size: 0.85rem;
    color: var(--primary-light);
    font-weight: 600;
}

.category-btn {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.category-btn:hover {
    transform: translateY(-2px);
}

.portfolio-filters {
    margin-bottom: var(--space-xl);
}

.filters-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--light-accent);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.filter-btn:hover {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
    border-color: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.filter-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.filter-btn i {
    font-size: 0.75rem;
}
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.portfolio-item {
    opacity: 1;
    transform: translateY(0);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.portfolio-item.hidden {
    opacity: 0;
    transform: translateY(20px);
    height: 0;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

.portfolio-card {
    height: var(--portfolio-card-height);
}

.portfolio-card-inner {
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: all var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.portfolio-card:hover .portfolio-card-inner {
    transform: translateY(-10px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-xl);
}

.portfolio-image {
    height: 180px;
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

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

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

.portfolio-overlay {
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    transition: opacity var(--transition-normal);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.portfolio-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.tech-badge {
    padding: 0.25rem 0.5rem;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.3);
    transition: all var(--transition-normal);
}

.tech-badge:hover {
    background: rgba(99, 102, 241, 0.3);
    transform: translateY(-2px);
}

.portfolio-category {
    background: rgba(99, 102, 241, 0.9);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    backdrop-filter: blur(5px);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

.portfolio-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.portfolio-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--light);
    line-height: 1.3;
}

.portfolio-description {
    font-size: 0.85rem;
    line-height: 1.5;
    color: var(--light-accent);
    flex-grow: 1;
}

.portfolio-features,
.portfolio-results {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.portfolio-feature,
.portfolio-result {
    padding: 0.125rem 0.5rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.portfolio-result {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border-color: rgba(16, 185, 129, 0.2);
}

.portfolio-footer {
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.portfolio-duration {
    font-size: 0.8rem;
}

.btn-portfolio-details {
    padding: 0.25rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 500;
    transition: all var(--transition-normal);
}

.btn-portfolio-details:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

.project-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    padding: var(--space-md);
    overflow-y: auto;
    align-items: center;
    justify-content: center;
}

.project-modal.active {
    display: flex;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 9999;
}

.modal-content {
    position: relative;
    z-index: 10000;
    max-width: var(--modal-width);
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    animation: modalFadeIn 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    padding: var(--space-md);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--light);
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--light-accent);
    font-size: 1.25rem;
    cursor: pointer;
    padding: 0.25rem;
    transition: color var(--transition-normal);
}

.modal-close:hover {
    color: white;
}

.modal-body {
    padding: var(--space-md);
}

.modal-image {
    border-radius: var(--radius-sm);
    overflow: hidden;
    margin-bottom: var(--space-md);
}

.modal-image img {
    width: 100%;
    height: auto;
    display: block;
}

.modal-meta {
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.modal-technologies {
    margin-bottom: var(--space-md);
}

.tech-badge-lg {
    padding: 0.375rem 0.875rem;
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-light);
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid rgba(99, 102, 241, 0.2);
}

.modal-features,
.modal-results {
    list-style: none;
    padding: 0;
    margin: 0;
}

.modal-features li,
.modal-results li {
    padding: 0.25rem 0;
    display: flex;
    align-items: flex-start;
}

.modal-features li i,
.modal-results li i {
    margin-top: 0.125rem;
}

.modal-footer {
    padding: var(--space-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
}

.modal-close-btn {
    min-width: 100px;
}

.portfolio-cta {
    background: var(--dark-alt);
}

.cta-card {
    background: var(--dark);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--light);
    margin-bottom: var(--space-sm);
}

.cta-text {
    font-size: 1.1rem;
    line-height: 1.6;
    color: var(--light-accent);
    max-width: 600px;
    margin: 0 auto var(--space-lg);
}

.cta-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.cta-note {
    font-size: 0.85rem;
    color: var(--light-accent);
    opacity: 0.7;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.animate-float-slow {
    animation: float 3s ease-in-out infinite;
}

.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 1200px) {
    .portfolio-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-card {
        height: auto;
    }
    
    .filters-container {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: var(--space-sm);
    }
}

@media (max-width: 768px) {
    .portfolio-hero {
        padding: var(--space-xl) 0;
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-text {
        margin-left: auto;
        margin-right: auto;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .portfolio-card {
        max-width: 400px;
        margin: 0 auto;
    }
    
    .modal-content {
        max-height: 90vh;
    }
    
    .modal-body .row {
        flex-direction: column;
    }
    
    .cta-card {
        padding: var(--space-lg) !important;
    }
    
    .cta-title {
        font-size: 1.75rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.375rem 0.75rem;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    .filter-btn {
        padding: 0.4rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .filter-btn i {
        margin-right: 0.25rem;
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .modal-close-btn,
    .modal-footer .btn {
        width: 100%;
        text-align: center;
    }
}

.bg-dark { background: var(--dark) !important; }
.bg-dark-alt { background: var(--dark-alt) !important; }
.border-light-10 { border-color: rgba(255, 255, 255, 0.1) !important; }
.text-light-emphasis { color: var(--light-accent) !important; }
.opacity-75 { opacity: 0.75 !important; }
.rounded-3 { border-radius: var(--radius-md) !important; }
.rounded-4 { border-radius: var(--radius-lg) !important; }
.shadow-lg { box-shadow: var(--shadow-lg) !important; }
.shadow-xl { box-shadow: var(--shadow-xl) !important; }
.btn-glow {
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3) !important;
    transition: all var(--transition-normal) !important;
}

.btn-glow:hover {
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4) !important;
    transform: translateY(-2px) !important;
}

.object-fit-cover {
    object-fit: cover !important;
}

.d-inline-block {
    display: inline-block !important;
}