/* ==========================================
   CSS Custom Properties (Design Tokens)
   ========================================== */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0f;
    --color-bg-secondary: #13131a;
    --color-bg-card: rgba(25, 25, 35, 0.6);
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0a0b0;
    --color-accent-1: #8b5cf6;
    --color-accent-2: #ef4444;
    --color-accent-3: #ec4899;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #ef4444 100%);
    --gradient-secondary: linear-gradient(135deg, #ec4899 0%, #8b5cf6 100%);
    --gradient-orb: radial-gradient(circle, rgba(139, 92, 246, 0.3) 0%, transparent 70%);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-family: 'Jost', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
}

/* ==========================================
   Reset & Base Styles
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

/* ==========================================
   Utility Classes
   ========================================== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==========================================
   Header Section
   ========================================== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding: var(--spacing-lg) 0;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.main-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: 0;
    text-align: center;
}

/* Filter Section */
.filter-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    width: 100%;
}

.search-wrapper {
    position: relative;
    width: 100%;
    max-width: 500px;
}

.search-icon {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) calc(var(--spacing-md) * 2.5);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.1);
}

.search-input::placeholder {
    color: var(--color-text-secondary);
}

/* Filter Buttons Container */
.filter-buttons-wrapper {
    position: relative;
    width: 100%;
    max-width: 900px;
}

.filter-buttons {
    display: flex;
    gap: var(--spacing-xs);
    overflow-x: auto;
    scroll-behavior: smooth;
    padding: var(--spacing-xs) 0;
    scrollbar-width: thin;
    scrollbar-color: rgba(139, 92, 246, 0.5) transparent;
}

.filter-buttons::-webkit-scrollbar {
    height: 6px;
}

.filter-buttons::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
}

.filter-buttons::-webkit-scrollbar-thumb {
    background: rgba(139, 92, 246, 0.5);
    border-radius: 3px;
}

.filter-buttons::-webkit-scrollbar-thumb:hover {
    background: rgba(139, 92, 246, 0.7);
}

.filter-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-secondary);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
    text-transform: capitalize;
    white-space: nowrap;
    flex-shrink: 0;
}

.filter-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--color-text-primary);
}

.filter-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-text-primary);
}

/* Scroll Buttons */
.scroll-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    background: rgba(10, 10, 15, 0.95);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 2;
}

.scroll-btn:hover {
    background: rgba(139, 92, 246, 0.3);
    border-color: var(--color-accent-1);
}

.scroll-btn.left {
    left: -16px;
}

.scroll-btn.right {
    right: -16px;
}

.scroll-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.scroll-btn:disabled:hover {
    background: rgba(10, 10, 15, 0.95);
    border-color: rgba(255, 255, 255, 0.2);
}

/* ==========================================
   Portfolio Section
   ========================================== */
.portfolio-section {
    position: relative;
    padding: var(--spacing-2xl) 0;
    min-height: 100vh;
}

/* No Results State */
.no-results {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-secondary);
}

.no-results svg {
    margin: 0 auto var(--spacing-md);
    color: var(--color-text-secondary);
}

.no-results h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-primary);
}

.no-results p {
    font-size: var(--font-size-base);
}

/* Portfolio Grid */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.portfolio-card {
    position: relative;
    background: var(--color-bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition-base);
    animation: fadeInUp 0.6s ease backwards;
}

.portfolio-card.hidden {
    display: none;
}

.portfolio-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(139, 92, 246, 0.5);
}

.portfolio-card-image {
    width: 100%;
    height: 280px;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

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

.portfolio-card-content {
    padding: var(--spacing-md);
}

.portfolio-card-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    text-transform: capitalize;
}

.portfolio-card-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.portfolio-card-count::before {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--color-accent-1);
    border-radius: 50%;
}

/* Loading State */
.loading-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    gap: var(--spacing-md);
    color: var(--color-text-secondary);
}

.loader {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(139, 92, 246, 0.2);
    border-top-color: var(--color-accent-1);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ==========================================
   Modal & Gallery
   ========================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    animation: fadeIn var(--transition-base);
}

.modal-content {
    position: relative;
    z-index: 2;
    background: var(--color-bg-secondary);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    max-width: 1200px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
    animation: scaleIn var(--transition-base);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
    z-index: 3;
}

.modal-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: rotate(90deg);
}

.modal-header {
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    text-transform: capitalize;
}

.modal-count {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Gallery Container */
.gallery-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.gallery-main {
    flex: 1;
    position: relative;
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-image {
    width: 100%;
    height: auto;
    max-height: 70vh;
    object-fit: contain;
    animation: fadeIn var(--transition-base);
}

.gallery-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-primary);
}

.gallery-loader.hidden {
    display: none;
}

.gallery-nav {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.gallery-nav:hover {
    background: rgba(139, 92, 246, 0.3);
    transform: scale(1.1);
}

.gallery-nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.gallery-nav:disabled:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: none;
}

/* Gallery Thumbnails */
.gallery-thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--spacing-sm);
    max-height: 200px;
    overflow-y: auto;
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-md);
}

.gallery-thumbnail {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all var(--transition-fast);
    opacity: 0.6;
}

.gallery-thumbnail:hover {
    opacity: 1;
    transform: scale(1.05);
}

.gallery-thumbnail.active {
    opacity: 1;
    border-color: var(--color-accent-1);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

/* ==========================================
   Footer
   ========================================== */
.footer {
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ==========================================
   Animations
   ========================================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

@keyframes bounce {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    33% {
        transform: translate(30px, -50px) scale(1.1);
    }

    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* ==========================================
   Responsive Design
   ========================================== */
@media (max-width: 768px) {
    :root {
        --font-size-5xl: 2.5rem;
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.75rem;
    }

    .header-content {
        gap: var(--spacing-md);
    }

    .main-title {
        font-size: var(--font-size-2xl);
    }

    .filter-section {
        width: 100%;
    }

    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-md);
    }

    .modal-content {
        padding: var(--spacing-lg);
    }

    .gallery-container {
        flex-direction: column;
    }

    .gallery-nav {
        position: absolute;
        top: 50%;
        transform: translateY(-50%);
        z-index: 2;
    }

    .gallery-prev {
        left: var(--spacing-sm);
    }

    .gallery-next {
        right: var(--spacing-sm);
    }

    .gallery-thumbnails {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }

    .gallery-thumbnail {
        height: 60px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-md);
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .modal {
        padding: var(--spacing-sm);
    }

    .modal-content {
        padding: var(--spacing-md);
        border-radius: var(--radius-md);
    }
}

/* ==========================================
   Scrollbar Styling
   ========================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: rgba(139, 92, 246, 0.5);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(139, 92, 246, 0.7);
}