/**
 * Graphic Design Section Styles
 * Completely separate design system from the main portfolio
 * Designer-level UI with creative animations and transitions
 */

/* ================================
   CSS Variables & Theme System
   ================================ */

:root {
    /* Light Theme Colors */
    --gd-bg-primary: #ffffff;
    --gd-bg-secondary: #f8f9fa;
    --gd-bg-elevated: #ffffff;
    --gd-text-primary: #0a0a0a;
    --gd-text-secondary: #4a4a4a;
    --gd-text-tertiary: #808080;
    --gd-border: #e5e5e5;
    --gd-accent: #6366f1;
    --gd-accent-hover: #4f46e5;
    --gd-shadow: rgba(0, 0, 0, 0.08);
    --gd-overlay: rgba(255, 255, 255, 0.95);
    
    /* Spacing */
    --gd-space-1: 0.25rem;
    --gd-space-2: 0.5rem;
    --gd-space-3: 0.75rem;
    --gd-space-4: 1rem;
    --gd-space-5: 1.25rem;
    --gd-space-6: 1.5rem;
    --gd-space-8: 2rem;
    --gd-space-12: 3rem;
    --gd-space-16: 4rem;
    --gd-space-20: 5rem;
    --gd-space-24: 6rem;
    
    /* Typography */
    --gd-font-display: 'Playfair Display', serif;
    --gd-font-heading: 'Space Grotesk', sans-serif;
    --gd-font-body: 'Montserrat', sans-serif;
    
    /* Transitions */
    --gd-transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --gd-transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --gd-transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --gd-transition-smooth: 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    
    /* Animations */
    --gd-ease-in-out: cubic-bezier(0.645, 0.045, 0.355, 1);
    --gd-ease-out-back: cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Borders */
    --gd-radius-sm: 0.5rem;
    --gd-radius-md: 0.75rem;
    --gd-radius-lg: 1rem;
    --gd-radius-xl: 1.5rem;
}

.dark {
    --gd-bg-primary: #000000;
    --gd-bg-secondary: #0a0a0a;
    --gd-bg-elevated: #121212;
    --gd-text-primary: #ffffff;
    --gd-text-secondary: #b8b8b8;
    --gd-text-tertiary: #808080;
    --gd-border: #1f1f1f;
    --gd-accent: #8b5cf6;
    --gd-accent-hover: #a78bfa;
    --gd-shadow: rgba(255, 255, 255, 0.05);
    --gd-overlay: rgba(0, 0, 0, 0.95);
}

/* ================================
   Base Styles
   ================================ */

.gd-body {
    margin: 0;
    padding: 0;
    font-family: var(--gd-font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--gd-text-primary);
    background: var(--gd-bg-primary);
    transition: background var(--gd-transition-base), color var(--gd-transition-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

* {
    box-sizing: border-box;
}

/* ================================
   Ambient Background - Bold Animated Pastel Mesh
   ================================ */

.gd-ambient {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

/* Dark Mode: Bold animated gradient */
.dark .gd-ambient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(139, 92, 246, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(99, 102, 241, 0.20) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(168, 85, 247, 0.15) 0%, transparent 60%);
    filter: blur(100px);
    animation: gdBoldShift 25s ease-in-out infinite alternate;
}

/* Light Mode: Strong pastel mesh (not opacity 0.03) */
.light .gd-ambient::before {
    content: '';
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(circle at 20% 30%, rgba(224, 207, 255, 0.6) 0%, transparent 45%),
        radial-gradient(circle at 80% 70%, rgba(199, 210, 254, 0.5) 0%, transparent 45%),
        radial-gradient(circle at 50% 50%, rgba(243, 232, 255, 0.4) 0%, transparent 55%);
    filter: blur(100px);
    animation: gdBoldShift 25s ease-in-out infinite alternate;
}

@keyframes gdBoldShift {
    0% { 
        transform: translate(0, 0) scale(1);
        opacity: 1;
    }
    50% {
        transform: translate(5%, -3%) scale(1.1);
        opacity: 0.9;
    }
    100% { 
        transform: translate(-3%, 5%) scale(1.05);
        opacity: 1;
    }
}

/* Respect prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
    .gd-ambient::before {
        animation: none !important;
    }
}

/* ================================
   Header/Navigation
   ================================ */

.gd-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--gd-overlay);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--gd-border);
    box-shadow: 0 1px 0 0 rgba(0, 0, 0, 0.05);
    transition: all var(--gd-transition-base);
}

.gd-header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--gd-space-4) var(--gd-space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gd-space-4);
}

.gd-back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--gd-space-2);
    color: var(--gd-text-secondary);
    text-decoration: none;
    font-family: var(--gd-font-heading);
    font-size: 0.875rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    transition: all var(--gd-transition-fast);
}

.gd-back-link:hover {
    color: var(--gd-accent);
    transform: translateX(-4px);
}

.gd-header-title h1 {
    margin: 0;
    font-family: var(--gd-font-heading);
    font-size: 1.125rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--gd-text-primary);
}

.gd-theme-toggle {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gd-bg-elevated);
    border: 1px solid var(--gd-border);
    border-radius: var(--gd-radius-md);
    cursor: pointer;
    transition: all var(--gd-transition-fast);
    color: var(--gd-text-secondary);
}

.gd-theme-toggle:hover {
    background: var(--gd-bg-secondary);
    border-color: var(--gd-accent);
    color: var(--gd-accent);
    transform: scale(1.05);
}

.dark .gd-theme-toggle .theme-icon-sun { display: none; }
.dark .gd-theme-toggle .theme-icon-moon { display: block; }
.light .gd-theme-toggle .theme-icon-sun { display: block; }
.light .gd-theme-toggle .theme-icon-moon { display: none; }

/* ================================
   Main Layout
   ================================ */

.gd-main {
    min-height: calc(100vh - 200px);
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--gd-space-12) var(--gd-space-6) var(--gd-space-16);
}

@media (max-width: 768px) {
    .gd-main {
        padding: var(--gd-space-8) var(--gd-space-4) var(--gd-space-12);
    }
}

/* ================================
   Hero Section
   ================================ */

.gd-hero {
    text-align: center;
    margin-bottom: var(--gd-space-16);
}

.gd-hero-content {
    max-width: 700px;
    margin: 0 auto;
}

.gd-hero-label {
    display: inline-block;
    font-family: var(--gd-font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--gd-accent);
    margin-bottom: var(--gd-space-4);
}

.gd-hero-heading {
    margin: 0 0 var(--gd-space-6);
    font-family: var(--gd-font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--gd-text-primary);
}

.gd-hero-subtitle {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 300;
    line-height: 1.7;
    color: var(--gd-text-secondary);
}

/* ================================
   Folder Grid
   ================================ */

.gd-folder-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--gd-space-8);
}

@media (max-width: 768px) {
    .gd-folder-grid {
        grid-template-columns: 1fr;
        gap: var(--gd-space-6);
    }
}

.gd-folder-card {
    display: block;
    text-decoration: none;
    background: var(--gd-bg-elevated);
    border: 1px solid var(--gd-border);
    border-radius: var(--gd-radius-lg);
    overflow: hidden;
    transition: all var(--gd-transition-smooth);
    transform-origin: center;
}

.gd-folder-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--gd-shadow);
    border-color: var(--gd-accent);
}

.gd-folder-cover {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
    background: var(--gd-bg-secondary);
}

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

.gd-folder-card:hover .gd-folder-cover img {
    transform: scale(1.05);
}

.gd-folder-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gd-text-tertiary);
}

.gd-folder-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom, transparent 60%, rgba(0, 0, 0, 0.7));
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: var(--gd-space-6);
    opacity: 0;
    transition: opacity var(--gd-transition-base);
}

.gd-folder-card:hover .gd-folder-overlay {
    opacity: 1;
}

.gd-folder-view {
    font-family: var(--gd-font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: white;
}

.gd-folder-info {
    padding: var(--gd-space-6);
}

.gd-folder-title {
    margin: 0 0 var(--gd-space-3);
    font-family: var(--gd-font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--gd-text-primary);
}

.gd-folder-description {
    margin: 0 0 var(--gd-space-4);
    font-size: 0.9375rem;
    line-height: 1.6;
    color: var(--gd-text-secondary);
}

.gd-folder-meta {
    display: flex;
    align-items: center;
    gap: var(--gd-space-3);
}

.gd-folder-count {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--gd-text-tertiary);
}

/* ================================
   Folder Page (Gallery View)
   ================================ */

.gd-folder-header {
    text-align: center;
    margin-bottom: var(--gd-space-12);
    padding-bottom: var(--gd-space-8);
    border-bottom: 1px solid var(--gd-border);
}

.gd-folder-heading {
    margin: 0 0 var(--gd-space-4);
    font-family: var(--gd-font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
    color: var(--gd-text-primary);
}

.gd-folder-lead {
    max-width: 600px;
    margin: 0 auto var(--gd-space-4);
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--gd-text-secondary);
}

.gd-folder-meta-bar {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--gd-space-4);
}

.gd-meta-item {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gd-text-tertiary);
}

/* ================================
   Gallery Grid
   ================================ */

.gd-gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--gd-space-6);
}

@media (max-width: 768px) {
    .gd-gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--gd-space-4);
    }
}

.gd-gallery-item {
    cursor: pointer;
    transition: transform var(--gd-transition-base);
}

.gd-gallery-item:hover {
    transform: scale(1.02);
}

.gd-gallery-media {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: var(--gd-bg-secondary);
    border-radius: var(--gd-radius-md);
}

.gd-gallery-media img,
.gd-gallery-media video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--gd-transition-base);
}

.gd-gallery-item:hover .gd-gallery-media img,
.gd-gallery-item:hover .gd-gallery-media video {
    transform: scale(1.05);
}

.gd-video-badge {
    position: absolute;
    bottom: var(--gd-space-3);
    right: var(--gd-space-3);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    border-radius: 50%;
    color: white;
}

.gd-gallery-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--gd-transition-base);
}

.gd-gallery-item:hover .gd-gallery-overlay {
    opacity: 1;
}

.gd-gallery-zoom {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    color: #000;
    transition: transform var(--gd-transition-fast);
}

.gd-gallery-zoom:hover {
    transform: scale(1.1);
}

.gd-gallery-caption {
    margin: var(--gd-space-3) 0 0;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--gd-text-secondary);
}

/* ================================
   Lightbox
   ================================ */

.gd-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--gd-transition-base);
}

.gd-lightbox.active {
    opacity: 1;
}

.gd-lightbox-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
}

.gd-lightbox-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--gd-space-8);
}

.gd-lightbox-close {
    position: absolute;
    top: var(--gd-space-4);
    right: var(--gd-space-4);
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    color: white;
    transition: all var(--gd-transition-fast);
}

.gd-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.gd-lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    cursor: pointer;
    color: white;
    transition: all var(--gd-transition-fast);
}

.gd-lightbox-nav:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.gd-lightbox-prev { left: var(--gd-space-4); }
.gd-lightbox-next { right: var(--gd-space-4); }

.gd-lightbox-media-wrap {
    max-width: 90vw;
    max-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gd-lightbox-media-wrap img,
.gd-lightbox-media-wrap video {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--gd-radius-md);
}

.gd-lightbox-caption {
    margin-top: var(--gd-space-4);
    max-width: 600px;
    text-align: center;
    font-size: 0.9375rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
}

.gd-lightbox-counter {
    position: absolute;
    bottom: var(--gd-space-4);
    left: 50%;
    transform: translateX(-50%);
    padding: var(--gd-space-2) var(--gd-space-4);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--gd-radius-lg);
    font-size: 0.875rem;
    font-weight: 500;
    color: white;
}

/* ================================
   Empty State
   ================================ */

.gd-empty-state {
    text-align: center;
    padding: var(--gd-space-16) var(--gd-space-4);
}

.gd-empty-icon {
    margin: 0 auto var(--gd-space-6);
    color: var(--gd-text-tertiary);
}

.gd-empty-title {
    margin: 0 0 var(--gd-space-3);
    font-family: var(--gd-font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--gd-text-primary);
}

.gd-empty-text {
    margin: 0;
    font-size: 1rem;
    color: var(--gd-text-secondary);
}

/* ================================
   Footer
   ================================ */

.gd-footer {
    border-top: 1px solid var(--gd-border);
    background: var(--gd-bg-elevated);
    padding: var(--gd-space-8) var(--gd-space-6);
    margin-top: var(--gd-space-16);
}

.gd-footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--gd-space-4);
    flex-wrap: wrap;
}

.gd-footer p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--gd-text-tertiary);
}

.gd-footer-links {
    display: flex;
    gap: var(--gd-space-6);
}

.gd-footer-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--gd-text-secondary);
    text-decoration: none;
    transition: color var(--gd-transition-fast);
}

.gd-footer-links a:hover {
    color: var(--gd-accent);
}

/* ================================
   Animations
   ================================ */

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

.fade-in-up {
    opacity: 0;
    animation: fadeInUp 0.6s var(--gd-ease-out-back) forwards;
}

.gd-folder-card,
.gd-gallery-item {
    opacity: 0;
}

.gd-folder-card.visible,
.gd-gallery-item.visible {
    animation: fadeInUp 0.6s var(--gd-ease-out-back) forwards;
}

/* ================================
   Reduced Motion
   ================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .gd-ambient {
        animation: none;
    }
    
    .fade-in-up,
    .gd-folder-card,
    .gd-gallery-item {
        opacity: 1;
        animation: none;
        transform: none;
    }
}

/* ================================
   Mobile Responsiveness
   ================================ */

@media (max-width: 768px) {
    .gd-header-inner {
        padding: var(--gd-space-3) var(--gd-space-4);
    }
    
    .gd-header-title h1 {
        font-size: 1rem;
    }
    
    .gd-hero-heading {
        font-size: 2rem;
    }
    
    .gd-folder-heading {
        font-size: 2rem;
    }
    
    .gd-lightbox-content {
        padding: var(--gd-space-4);
    }
    
    .gd-lightbox-nav {
        width: 40px;
        height: 40px;
    }
    
    .gd-footer-inner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .gd-header-inner {
        padding: var(--gd-space-2) var(--gd-space-3);
        gap: var(--gd-space-2);
    }
    
    .gd-back-link {
        font-size: 0.8125rem;
    }
    
    .gd-header-title h1 {
        font-size: 0.9375rem;
    }
    
    .gd-theme-toggle {
        width: 36px;
        height: 36px;
    }
    
    .gd-main {
        padding: var(--gd-space-6) var(--gd-space-3) var(--gd-space-8);
    }
    
    .gd-hero {
        margin-bottom: var(--gd-space-8);
    }
    
    .gd-hero-label {
        font-size: 0.75rem;
    }
    
    .gd-hero-heading {
        font-size: clamp(1.75rem, 8vw, 2.5rem);
    }
    
    .gd-hero-subtitle {
        font-size: 1rem;
    }
    
    .gd-folder-grid {
        grid-template-columns: 1fr;
        gap: var(--gd-space-4);
    }
    
    .gd-folder-info {
        padding: var(--gd-space-4);
    }
    
    .gd-folder-title {
        font-size: 1.25rem;
    }
    
    .gd-folder-description {
        font-size: 0.875rem;
    }
    
    .gd-folder-heading {
        font-size: clamp(1.5rem, 6vw, 2rem);
    }
    
    .gd-folder-lead {
        font-size: 1rem;
    }
    
    .gd-gallery-grid {
        grid-template-columns: 1fr;
        gap: var(--gd-space-3);
    }
    
    .gd-lightbox-content {
        padding: var(--gd-space-3);
    }
    
    .gd-lightbox-close,
    .gd-lightbox-nav {
        width: 36px;
        height: 36px;
    }
    
    .gd-lightbox-media-wrap {
        max-width: 95vw;
        max-height: 70vh;
    }
    
    .gd-footer {
        padding: var(--gd-space-6) var(--gd-space-3);
    }
    
    .gd-footer-links {
        gap: var(--gd-space-4);
    }
}

@media (max-width: 360px) {
    .gd-header-inner {
        padding: var(--gd-space-2);
    }
    
    .gd-back-link {
        font-size: 0.75rem;
    }
    
    .gd-header-title h1 {
        font-size: 0.875rem;
    }
    
    .gd-theme-toggle {
        width: 32px;
        height: 32px;
    }
    
    .gd-main {
        padding: var(--gd-space-4) var(--gd-space-2) var(--gd-space-6);
    }
    
    .gd-hero-heading {
        font-size: clamp(1.5rem, 10vw, 2rem);
    }
    
    .gd-hero-subtitle {
        font-size: 0.9375rem;
    }
    
    .gd-folder-info {
        padding: var(--gd-space-3);
    }
    
    .gd-folder-title {
        font-size: 1.125rem;
    }
}