/* ============================================
   DESIGN SYSTEM - CSS CUSTOM PROPERTIES
   Consistent spacing, colors, borders, and shadows
   ============================================ */

:root {
    /* Spacing Scale (8px increments) */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 40px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    
    /* Color Palette */
    --color-primary: #4a90e2;
    --color-primary-light: #6ba8f0;
    --color-primary-dark: #3f72af;
    --color-secondary: #c0c0c0;
    --color-accent: #c79f60;
    
    /* Background Colors */
    --color-bg-dark: #0a0a0a;
    --color-bg-medium: #111111;
    --color-bg-surface: rgba(17, 17, 17, 0.7);
    --color-bg-surface-solid: rgba(17, 17, 17, 0.95);
    
    /* Text Colors */
    --color-text-primary: #e0e0e0;
    --color-text-secondary: #b0b0b0;
    --color-text-tertiary: #888888;
    --color-text-muted: #555555;
    --color-text-white: #ffffff;
    
    /* Border Colors */
    --color-border-light: rgba(255, 255, 255, 0.1);
    --color-border-medium: #222222;
    --color-border-dark: #333333;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Box Shadow Depths */
    --shadow-low: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-high: 0 12px 40px rgba(0, 0, 0, 0.4);
    
    /* Rarity-specific shadows */
    --shadow-blue: 0 12px 40px rgba(74, 144, 226, 0.4);
    --shadow-silver: 0 12px 40px rgba(192, 192, 192, 0.4);
    --shadow-gold: 0 12px 40px rgba(199, 159, 96, 0.4);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Georgia', serif;
    background: var(--color-bg-dark);
    color: var(--color-text-primary);
    line-height: 1.7;
    padding: var(--spacing-sm);
    font-size: 1em;
    position: relative;
}

/* Fractal SVG Background */
#fractal-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    filter: blur(80px);
    opacity: 0.6;
    pointer-events: none;
}

/* ============================================
   TOUCH-FRIENDLY INTERACTIONS
   Ensures all interactive elements meet WCAG 2.1 
   minimum touch target size of 44x44px
   ============================================ */

/* Links and buttons - minimum 44x44px touch targets */
a,
button {
    min-height: 44px;
    min-width: 44px;
    padding: 12px var(--spacing-sm);
    display: inline-block;
    text-decoration: none;
    color: var(--color-primary);
    transition: color 300ms ease, transform 200ms ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(74, 144, 226, 0.2);
}

a:hover,
button:hover {
    color: var(--color-primary-light);
    transform: translateY(-2px);
}

a:active,
button:active {
    transform: translateY(0);
    color: var(--color-primary);
}

/* Ensure adequate spacing between interactive elements */
a + a,
button + button {
    margin-left: var(--spacing-xs);
}

/* Glassmorphism Container System - Optimized */
.glass-container {
    background: var(--color-bg-surface-solid);
    border: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-medium);
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: var(--spacing-sm);
}

header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border-dark);
    padding-bottom: var(--spacing-md);
}

h1 {
    font-size: 2.5em;
    font-weight: 300;
    letter-spacing: 4px;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, 
        #a8c0ff 0%, 
        var(--color-primary-dark) 50%, 
        var(--color-accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    /* Removed: animation: gradientShift 8s ease infinite; for performance */
    /* Removed: background-size: 200% 200%; */
}

.tagline {
    font-size: 1em;
    color: var(--color-text-tertiary);
    font-style: italic;
    letter-spacing: 1px;
}

section {
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 1.5em;
    font-weight: 400;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-white);
    letter-spacing: 2px;
}

p {
    margin-bottom: var(--spacing-sm);
    font-size: 1em;
    color: var(--color-text-secondary);
}

.concept {
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-left: 3px solid var(--color-primary-dark);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 20px;
    margin: var(--spacing-md) 0;
}

.rarity-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.rarity-card {
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    padding: var(--spacing-md);
    text-align: center;
    transition: transform 300ms cubic-bezier(0.4, 0.0, 0.2, 1),
                box-shadow 300ms cubic-bezier(0.4, 0.0, 0.2, 1),
                border-color 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    transform: translateZ(0);
    min-height: 44px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    contain: layout style paint;
}

.rarity-card:hover {
    transform: translateY(-4px);
    /* Removed: scale, translateZ, will-change for performance */
}

.rarity-card.blue {
    border-top: 3px solid var(--color-primary);
}

.rarity-card.blue:hover {
    border-color: var(--color-primary);
    background: linear-gradient(135deg,
        rgba(74, 144, 226, 0.15) 0%,
        var(--color-bg-surface) 100%);
    box-shadow: var(--shadow-blue);
}

.rarity-card.silver {
    border-top: 3px solid var(--color-secondary);
}

.rarity-card.silver:hover {
    border-color: var(--color-secondary);
    background: linear-gradient(135deg,
        rgba(192, 192, 192, 0.15) 0%,
        var(--color-bg-surface) 100%);
    box-shadow: var(--shadow-silver);
}

.rarity-card.gold {
    border-top: 3px solid var(--color-accent);
}

.rarity-card.gold:hover {
    border-color: var(--color-accent);
    background: linear-gradient(135deg,
        rgba(199, 159, 96, 0.15) 0%,
        var(--color-bg-surface) 100%);
    box-shadow: var(--shadow-gold);
}

.rarity-name {
    font-size: 1.3em;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
}

.rarity-description {
    color: var(--color-text-tertiary);
    font-size: 0.95em;
}

.specs {
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 20px;
    margin: var(--spacing-md) 0;
}

.specs ul {
    list-style: none;
    padding-left: 0;
}

.specs li {
    padding: 12px 0;
    border-bottom: 1px solid #1a1a1a;
    color: var(--color-text-secondary);
}

.specs li:last-child {
    border-bottom: none;
}

.specs strong {
    color: var(--color-text-white);
    margin-right: 10px;
}

.philosophy {
    background: linear-gradient(135deg,
        rgba(74, 144, 226, 0.1) 0%,
        rgba(192, 192, 192, 0.05) 50%,
        rgba(199, 159, 96, 0.1) 100%);
    /* Removed: background-size: 200% 200%; for performance */
    padding: 20px;
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-sm);
    text-align: center;
    /* Removed: animation: gradientShift 8s ease infinite; for performance */
}

.philosophy p {
    font-size: 1.05em;
    font-style: italic;
    line-height: 1.7;
    color: #ccc;
}

.example-images {
    margin: var(--spacing-md) 0;
    padding: 20px;
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
}

.example-images img {
    transition: transform 400ms cubic-bezier(0.4, 0.0, 0.2, 1),
                filter 400ms cubic-bezier(0.4, 0.0, 0.2, 1);
    transform: translateZ(0);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    min-height: 44px;
    touch-action: manipulation;
}

.example-images img:hover {
    transform: scale(1.02);
    filter: brightness(1.1);
    /* Removed: translateZ, will-change for performance */
}

.example-images img:active {
    transform: scale(0.98) translateZ(0);
}

.example-note {
    background: var(--color-bg-medium);
    padding: var(--spacing-sm);
    border-left: 3px solid var(--color-primary);
    margin-top: var(--spacing-md);
    font-size: 0.9em;
    color: #999;
}

footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-medium);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.85em;
}

.block-height {
    font-family: 'Courier New', monospace;
    background: var(--color-bg-dark);
    padding: 2px var(--spacing-xs);
    border-radius: 3px;
    border: 1px solid var(--color-border-dark);
}

/* Gradient Animation Keyframes - DISABLED for performance */
/*
@keyframes gradientShift {
    0%, 100% { 
        background-position: 0% 50%; 
    }
    50% { 
        background-position: 100% 50%; 
    }
}
*/

/* Mobile-specific touch enhancements */
@media (max-width: 479px) {
    a,
    button {
        padding: 14px 18px;
        min-height: 48px;
        min-width: 48px;
    }
    
    .rarity-card {
        padding: 28px;
        min-height: 48px;
    }
    
    .stat-item {
        padding: 24px;
        min-height: 48px;
    }
}

/* Tablet breakpoint - 480px and up */
@media (min-width: 480px) {
    body {
        padding: 20px;
        font-size: 1.02em;
    }
    
    .container {
        padding: var(--spacing-md);
    }
    
    header {
        margin-bottom: var(--spacing-xl);
        padding-bottom: var(--spacing-lg);
    }
    
    h1 {
        font-size: 3em;
        letter-spacing: 6px;
        margin-bottom: 20px;
    }
    
    .tagline {
        font-size: 1.05em;
        letter-spacing: 1.5px;
    }
    
    h2 {
        font-size: 1.6em;
        letter-spacing: 2.5px;
    }
    
    p {
        font-size: 1.02em;
    }
    
    section {
        margin-bottom: var(--spacing-xl);
    }
    
    .concept {
        padding: 30px;
        margin: var(--spacing-lg) 0;
    }
    
    .philosophy {
        padding: 35px;
        margin: var(--spacing-xl) 0;
    }
    
    .philosophy p {
        font-size: 1.1em;
    }
    
    .rarity-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-md);
        margin: var(--spacing-lg) 0;
    }
    
    .rarity-card {
        padding: 28px;
    }
    
    .rarity-name {
        font-size: 1.4em;
        letter-spacing: 1.5px;
    }
    
    .specs {
        padding: var(--spacing-md);
        margin: var(--spacing-lg) 0;
    }
    
    .example-images {
        padding: 30px;
        margin: var(--spacing-lg) 0;
    }
    
    .example-note {
        padding: 18px;
        margin-top: 28px;
    }
    
    .stats-container {
        padding: 30px;
        margin: var(--spacing-lg) 0;
    }
    
    .stats-container h3 {
        font-size: 1.4em;
        margin-bottom: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: 18px;
    }
    
    .stat-item {
        padding: 22px;
    }
    
    .stat-number {
        font-size: 2.2em;
    }
    
    footer {
        margin-top: var(--spacing-3xl);
        padding-top: var(--spacing-lg);
        font-size: 0.88em;
    }
}

/* Desktop breakpoint - 768px and up */
@media (min-width: 768px) {
    body {
        padding: 20px;
        font-size: 1.05em;
    }
    
    .container {
        padding: var(--spacing-xl) 20px;
    }
    
    header {
        margin-bottom: 60px;
        padding-bottom: var(--spacing-xl);
    }
    
    h1 {
        font-size: 3.5em;
        letter-spacing: 8px;
    }
    
    .tagline {
        font-size: 1.1em;
        letter-spacing: 2px;
    }
    
    h2 {
        font-size: 1.8em;
        letter-spacing: 3px;
        margin-bottom: 20px;
    }
    
    p {
        font-size: 1.05em;
        margin-bottom: 20px;
    }
    
    section {
        margin-bottom: 50px;
    }
    
    .concept {
        padding: var(--spacing-xl);
        margin: var(--spacing-xl) 0;
    }
    
    .philosophy {
        padding: 50px;
        margin: 60px 0;
    }
    
    .philosophy p {
        font-size: 1.2em;
        line-height: 1.8;
    }
    
    .rarity-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 30px;
        margin: var(--spacing-xl) 0;
    }
    
    .rarity-card {
        padding: 30px;
    }
    
    .rarity-name {
        font-size: 1.5em;
        margin-bottom: 10px;
        letter-spacing: 2px;
    }
    
    .specs {
        padding: 30px;
        margin: var(--spacing-xl) 0;
    }
    
    .example-images {
        padding: var(--spacing-xl);
        margin: var(--spacing-xl) 0;
    }
    
    .example-note {
        padding: 20px;
        margin-top: 30px;
        font-size: 0.95em;
    }
    
    .stats-container {
        padding: var(--spacing-xl);
        margin: var(--spacing-xl) 0;
    }
    
    .stats-container h3 {
        font-size: 1.5em;
        margin-bottom: 30px;
        letter-spacing: 2px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 20px;
    }
    
    .stat-item {
        padding: 25px;
    }
    
    .stat-number {
        font-size: 2.5em;
        margin-bottom: 10px;
    }
    
    footer {
        margin-top: var(--spacing-4xl);
        padding-top: var(--spacing-xl);
        font-size: 0.9em;
    }
}


/* Catalog Stats Styling */
.stats-container {
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 20px;
    margin: var(--spacing-md) 0;
}

.stats-container h3 {
    font-size: 1.3em;
    font-weight: 400;
    margin-bottom: 20px;
    color: var(--color-text-white);
    letter-spacing: 1px;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
}

.stat-item {
    background: var(--color-bg-medium);
    padding: 20px;
    border-radius: var(--radius-sm);
    text-align: center;
    border: 1px solid var(--color-border-medium);
    transition: transform 0.3s ease;
    min-height: 44px;
    cursor: default;
    -webkit-tap-highlight-color: transparent;
    contain: layout style paint;
}

.stat-item:hover {
    transform: translateY(-2px);
    /* Removed: will-change for performance */
}

.stat-number {
    display: block;
    font-size: 2em;
    font-weight: 300;
    color: var(--color-text-white);
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    display: block;
    font-size: 0.9em;
    color: var(--color-text-tertiary);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.stat-blue {
    border-top: 3px solid var(--color-primary);
}

.stat-silver {
    border-top: 3px solid var(--color-secondary);
}

.stat-gold {
    border-top: 3px solid var(--color-accent);
}

/* Scroll-triggered animations - SIMPLIFIED for performance */
section {
    opacity: 1;
    transform: none;
    /* Removed: transition, will-change for performance */
}

/* Only animate hero section */
.hero {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 400ms ease, transform 400ms ease;
}

.hero.animate-in {
    opacity: 1;
    transform: translateY(0);
}

/* Ensure header is always visible (not a section) */
header {
    opacity: 1;
    transform: none;
}

/* Graceful degradation: show all content if animations are disabled */
.no-intersection-observer .hero {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   ACCESSIBILITY ENHANCEMENTS
   ============================================ */

/* Visible focus indicators for all focusable elements */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* Enhanced focus for interactive elements */
a:focus,
button:focus,
.rarity-card:focus,
.stat-item:focus,
.example-images img:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
    border-radius: var(--radius-sm);
}

/* Skip to main content link */
.skip-link {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-text-white);
    padding: 12px var(--spacing-md);
    text-decoration: none;
    z-index: 1000;
    font-weight: bold;
    border-radius: 0 0 var(--radius-sm) 0;
    transition: top 300ms ease;
}

.skip-link:focus {
    top: 0;
    outline: 2px solid var(--color-text-white);
    outline-offset: 2px;
}

/* Reduced motion support - disable animations for users who prefer reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
    
    /* Ensure content is visible immediately */
    section {
        opacity: 1 !important;
        transform: none !important;
    }
    
    /* Disable gradient animations */
    h1,
    .philosophy {
        animation: none !important;
    }
    
    /* Disable hover transforms */
    .rarity-card:hover,
    .example-images img:hover,
    .stat-item:hover,
    a:hover,
    button:hover {
        transform: none !important;
    }
}

/* ============================================
   GALLERY CONTAINER
   Wrapper for flip card gallery display
   ============================================ */

#gallery-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
}

@media (min-width: 480px) {
    #gallery-container {
        gap: var(--spacing-2xl);
        padding: var(--spacing-xl) 0;
    }
}

@media (min-width: 768px) {
    #gallery-container {
        gap: var(--spacing-3xl);
        padding: var(--spacing-2xl) 0;
    }
}

/* ============================================
   FLIP CARD COMPONENTS
   Interactive card flip animation for gallery
   ============================================ */

/* Flip Card Container - Creates 3D space */
.flip-card {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
    perspective: 1000px;
}

/* Card Inner - Handles rotation transform */
.flip-card-inner {
    position: relative;
    width: 100%;
    transition: transform 600ms cubic-bezier(0.4, 0.0, 0.2, 1);
    transform-style: preserve-3d;
}

/* Flipped state */
.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

/* Card Faces - Front and Back */
.flip-card-front,
.flip-card-back {
    width: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

.flip-card-back {
    position: absolute;
    top: 0;
    left: 0;
    transform: rotateY(180deg);
}

/* Card images */
.flip-card-front img,
.flip-card-back img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-medium);
}

/* Card captions */
.card-caption {
    margin-top: var(--spacing-sm);
    font-size: 0.9em;
    color: var(--color-text-tertiary);
    text-align: center;
    font-style: italic;
}

/* Flip Button */
.flip-button {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    max-width: 200px;
    margin: var(--spacing-sm) auto 0;
    padding: 12px var(--spacing-md);
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    color: var(--color-primary);
    font-size: 1em;
    font-family: 'Georgia', serif;
    cursor: pointer;
    transition: all 300ms ease;
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation; /* Prevents double-tap zoom */
    -webkit-tap-highlight-color: rgba(74, 144, 226, 0.2);
    user-select: none; /* Prevents text selection on touch */
    -webkit-user-select: none;
}

.flip-button:hover {
    background: var(--color-primary);
    color: var(--color-text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.flip-button:active {
    transform: translateY(0);
}

.flip-button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

.flip-icon {
    font-size: 1.2em;
    transition: transform 300ms ease;
}

.flip-card.flipped .flip-icon {
    transform: rotate(180deg);
}

/* Performance optimizations */
.flip-card-inner {
    contain: layout style paint;
}

/* GPU acceleration hint */
.flip-card.flipping .flip-card-inner {
    will-change: transform;
}

/* Browser compatibility fallback for non-3D transform support */
@supports not (transform-style: preserve-3d) {
    .flip-card-inner {
        transition: opacity 300ms ease;
    }
    
    .flip-card.flipped .flip-card-front {
        opacity: 0;
        pointer-events: none;
    }
    
    .flip-card.flipped .flip-card-back {
        opacity: 1;
        position: relative;
        transform: none;
    }
    
    .flip-card:not(.flipped) .flip-card-back {
        opacity: 0;
        pointer-events: none;
    }
}

/* Reduced motion fallback - fade transition instead of flip */
@media (prefers-reduced-motion: reduce) {
    .flip-card-inner {
        transition: opacity 300ms ease;
        transform: none !important;
    }
    
    .flip-card.flipped .flip-card-front {
        opacity: 0;
        pointer-events: none;
    }
    
    .flip-card.flipped .flip-card-back {
        opacity: 1;
        position: relative;
        transform: none;
    }
    
    .flip-card:not(.flipped) .flip-card-back {
        opacity: 0;
        pointer-events: none;
    }
    
    .flip-button:hover {
        transform: none !important;
    }
    
    .flip-icon {
        transition: none !important;
    }
    
    .flip-card.flipped .flip-icon {
        transform: none !important;
    }
}

/* ============================================
   HERO SECTION
   Prominent hero flip card with hook text
   ============================================ */

.hero {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Hero-specific flip card sizing */
.hero-flip-card {
    max-width: 100%;
    margin: 0 auto;
}

/* Hero hook text - concise one-sentence explanation */
.hero-hook {
    font-size: 1.3em;
    font-weight: 300;
    text-align: center;
    color: var(--color-text-white);
    letter-spacing: 1px;
    max-width: 800px;
    margin: var(--spacing-md) auto;
    line-height: 1.6;
}

/* Tablet breakpoint - 480px and up */
@media (min-width: 480px) {
    .hero-hook {
        font-size: 1.5em;
    }
}

/* Desktop breakpoint - 768px and up */
@media (min-width: 768px) {
    .hero {
        margin-bottom: 60px;
    }
    
    .hero-flip-card {
        max-width: 900px;
    }
    
    .hero-hook {
        font-size: 1.8em;
    }
}

/* Mobile-specific enhancements */
@media (max-width: 479px) {
    .flip-button {
        padding: 14px 18px;
        min-height: 48px;
        min-width: 48px;
        max-width: 100%;
    }

    .flip-card {
        margin-bottom: var(--spacing-xl);
    }
}

/* Tablet and desktop adjustments */
@media (min-width: 480px) {
    .flip-card {
        margin-bottom: var(--spacing-3xl);
    }

    .flip-button {
        font-size: 1.05em;
    }
}

/* ============================================
   STICKY NAVIGATION
   Fixed navigation with glassmorphism effect
   ============================================ */

.sticky-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-bg-surface-solid);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-medium);
    height: 60px;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-md);
    transition: transform 300ms ease, box-shadow 300ms ease;
}

/* Hamburger menu button - mobile only */
.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 48px;
    height: 48px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
    transition: transform 300ms ease;
}

.nav-toggle:hover {
    transform: scale(1.1);
}

.nav-toggle:active {
    transform: scale(0.95);
}

/* Hamburger icon lines */
.hamburger-icon,
.hamburger-icon::before,
.hamburger-icon::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: all 300ms ease;
    border-radius: 2px;
}

.hamburger-icon {
    position: relative;
}

.hamburger-icon::before,
.hamburger-icon::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger-icon::before {
    top: -8px;
}

.hamburger-icon::after {
    top: 8px;
}

/* Hamburger animation when menu is open */
.nav-toggle[aria-expanded="true"] .hamburger-icon {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger-icon::before {
    transform: rotate(45deg);
    top: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-icon::after {
    transform: rotate(-45deg);
    top: 0;
}

/* Navigation menu */
.nav-menu {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--color-bg-surface-solid);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-medium);
    max-height: 0;
    overflow: hidden;
    transition: max-height 400ms cubic-bezier(0.4, 0.0, 0.2, 1);
}

/* Menu open state */
.nav-menu.active {
    max-height: 400px;
}

/* Navigation menu items */
.nav-menu li {
    border-bottom: 1px solid var(--color-border-light);
}

.nav-menu li:last-child {
    border-bottom: none;
}

/* Navigation links */
.nav-menu a {
    display: block;
    padding: 16px var(--spacing-md);
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 1em;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all 300ms ease;
    min-height: 48px;
    min-width: 48px;
    text-align: center;
}

.nav-menu a:hover {
    color: var(--color-primary-light);
    background: rgba(74, 144, 226, 0.1);
    transform: translateX(4px);
}

.nav-menu a:active {
    transform: translateX(0);
}

/* Active section highlighting */
.nav-menu a.active {
    color: var(--color-primary);
    background: rgba(74, 144, 226, 0.15);
    border-left: 3px solid var(--color-primary);
}

/* Desktop navigation - 768px and up */
@media (min-width: 768px) {
    /* Hide hamburger menu on desktop */
    .nav-toggle {
        display: none;
    }
    
    /* Horizontal menu layout */
    .nav-menu {
        position: static;
        flex-direction: row;
        justify-content: center;
        align-items: center;
        gap: var(--spacing-xs);
        max-height: none;
        overflow: visible;
        background: transparent;
        border-bottom: none;
        box-shadow: none;
    }
    
    .nav-menu li {
        border-bottom: none;
    }
    
    .nav-menu a {
        padding: 10px 18px;
        font-size: 0.9em;
        border-radius: var(--radius-sm);
        min-height: 44px;
        min-width: 44px;
        text-align: center;
    }
    
    .nav-menu a:hover {
        transform: translateY(-2px);
        background: rgba(74, 144, 226, 0.15);
    }
    
    .nav-menu a:active {
        transform: translateY(0);
    }
    
    /* Active section highlighting on desktop */
    .nav-menu a.active {
        color: var(--color-primary);
        background: rgba(74, 144, 226, 0.2);
        border-left: none;
        border-bottom: 2px solid var(--color-primary);
    }
}

/* Smooth scroll behavior */
html {
    scroll-behavior: smooth;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
    
    .sticky-nav,
    .nav-menu,
    .nav-menu a,
    .nav-toggle,
    .hamburger-icon,
    .hamburger-icon::before,
    .hamburger-icon::after {
        transition: none !important;
    }
    
    .nav-menu a:hover,
    .nav-toggle:hover {
        transform: none !important;
    }
}

/* Container spacing already handled in critical CSS */

/* ============================================
   CONTACT SECTION
   Social and contact links with glassmorphism
   ============================================ */

#contact {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

#contact h2 {
    text-align: center;
    margin-bottom: var(--spacing-md);
}

#contact > p {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary);
}

/* Contact links container */
.contact-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
}

/* Individual contact link cards */
.contact-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 20px var(--spacing-md);
    min-height: 48px;
    min-width: 48px;
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--spacing-lg);
    box-shadow: var(--shadow-medium);
    color: var(--color-text-white);
    text-decoration: none;
    font-size: 1em;
    letter-spacing: 0.5px;
    transition: all 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(74, 144, 226, 0.2);
    contain: layout style paint;
}

/* Hover effects */
.contact-link:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-high);
    border-color: var(--color-primary);
    background: linear-gradient(135deg,
        rgba(74, 144, 226, 0.15) 0%,
        var(--color-bg-surface) 100%);
    color: var(--color-primary-light);
}

.contact-link:active {
    transform: translateY(-2px);
}

/* Link icon styling */
.link-icon {
    font-size: 1.5em;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
}

/* Link text styling */
.link-text {
    font-family: 'Georgia', serif;
    font-weight: 400;
}

/* Tablet breakpoint - 480px and up */
@media (min-width: 480px) {
    .contact-links {
        gap: 20px;
    }
    
    .contact-link {
        padding: 22px var(--spacing-lg);
        font-size: 1.05em;
    }
    
    .link-icon {
        font-size: 1.6em;
    }
}

/* Desktop breakpoint - 768px and up */
@media (min-width: 768px) {
    #contact {
        margin-top: 60px;
        margin-bottom: 60px;
    }
    
    /* Horizontal layout on desktop */
    .contact-links {
        flex-direction: row;
        max-width: 800px;
        gap: var(--spacing-lg);
    }
    
    .contact-link {
        flex: 1;
        padding: 25px var(--spacing-lg);
        min-height: 44px;
        font-size: 1.1em;
    }
    
    .link-icon {
        font-size: 1.8em;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .contact-link {
        transition: none !important;
    }
    
    .contact-link:hover {
        transform: none !important;
    }
}

/* ============================================
   CARD AVAILABILITY GRID
   Display all cards with availability status
   ============================================ */

/* Availability grid container */
.availability-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

/* Individual availability card */
.availability-card {
    position: relative;
    background: var(--color-bg-surface-solid);
    /* Removed: backdrop-filter for performance */
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    overflow: hidden;
    transition: transform 300ms cubic-bezier(0.4, 0.0, 0.2, 1),
                box-shadow 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    contain: layout style paint;
    cursor: default;
}

/* Hover effect */
.availability-card:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-high);
    /* Removed: will-change for performance */
}

/* Card image container */
.availability-card img {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    display: block;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

/* Card information section */
.card-info {
    padding: var(--spacing-md);
    position: relative;
}

/* Card title */
.card-title {
    font-size: 1.1em;
    font-weight: 400;
    color: var(--color-text-white);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.5px;
}

/* Card rarity and edition */
.card-rarity {
    font-size: 0.9em;
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-sm);
}

/* Availability badge */
.availability-badge {
    position: absolute;
    bottom: var(--spacing-sm);
    right: var(--spacing-sm);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.85em;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    box-shadow: var(--shadow-low);
}

/* Badge color coding */
.availability-badge.available {
    background: #4caf50;
    color: var(--color-text-white);
}

.availability-badge.collected {
    background: #757575;
    color: var(--color-text-white);
}

.availability-badge.unknown {
    background: #ff9800;
    color: var(--color-text-white);
}

/* Tablet breakpoint - 480px and up */
@media (min-width: 480px) {
    .availability-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .card-info {
        padding: 20px;
    }
    
    .card-title {
        font-size: 1.15em;
    }
    
    .availability-badge {
        padding: 7px 14px;
        font-size: 0.88em;
    }
}

/* Desktop breakpoint - 768px and up */
@media (min-width: 768px) {
    .availability-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--spacing-lg);
        margin: var(--spacing-xl) 0;
    }
    
    .card-info {
        padding: 22px;
    }
    
    .card-title {
        font-size: 1.2em;
        margin-bottom: 10px;
    }
    
    .card-rarity {
        font-size: 0.95em;
        margin-bottom: 18px;
    }
    
    .availability-badge {
        padding: 8px 16px;
        font-size: 0.9em;
        bottom: 20px;
        right: 20px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .availability-card {
        transition: none !important;
    }
    
    .availability-card:hover {
        transform: none !important;
    }
}

/* ============================================
   SCARCITY VISUALIZATION SECTION
   Annotation ink color distribution and forecast
   ============================================ */

/* Scarcity section container */
.scarcity-section {
    padding: var(--spacing-3xl) var(--spacing-md);
    background: var(--color-bg-medium);
    border-top: 1px solid var(--color-border-dark);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xl);
}

.scarcity-section .section-heading {
    font-size: 1.8em;
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-white);
    letter-spacing: 2px;
    text-align: center;
}

.scarcity-section .section-description {
    text-align: center;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.7;
}

/* Chart container with glassmorphism effect */
.scarcity-chart-container {
    max-width: 800px;
    margin: var(--spacing-2xl) auto;
    padding: var(--spacing-lg);
    background: var(--color-bg-surface-solid);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-medium);
    contain: layout style paint;
}

/* Canvas element for chart */
.scarcity-chart {
    width: 100%;
    height: 200px;
    display: block;
}

/* Statistics grid layout */
.scarcity-stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
    margin: var(--spacing-2xl) 0;
}

/* Individual stat card */
.scarcity-stats-grid .stat-card {
    padding: var(--spacing-lg);
    background: var(--color-bg-surface-solid);
    border-radius: var(--radius-lg);
    text-align: center;
    border: 2px solid transparent;
    box-shadow: var(--shadow-medium);
    transition: transform 300ms cubic-bezier(0.4, 0.0, 0.2, 1),
                border-color 300ms cubic-bezier(0.4, 0.0, 0.2, 1),
                box-shadow 300ms cubic-bezier(0.4, 0.0, 0.2, 1);
    min-height: 44px;
    cursor: default;
    contain: layout style paint;
}

.scarcity-stats-grid .stat-card:hover {
    transform: translateY(-4px);
}

/* Rarity-specific border colors */
.scarcity-stats-grid .stat-card.blue {
    border-color: var(--color-primary);
}

.scarcity-stats-grid .stat-card.blue:hover {
    box-shadow: var(--shadow-blue);
    background: linear-gradient(135deg,
        rgba(74, 144, 226, 0.1) 0%,
        var(--color-bg-surface) 100%);
}

.scarcity-stats-grid .stat-card.silver {
    border-color: var(--color-secondary);
}

.scarcity-stats-grid .stat-card.silver:hover {
    box-shadow: var(--shadow-silver);
    background: linear-gradient(135deg,
        rgba(192, 192, 192, 0.1) 0%,
        var(--color-bg-surface) 100%);
}

.scarcity-stats-grid .stat-card.gold {
    border-color: var(--color-accent);
}

.scarcity-stats-grid .stat-card.gold:hover {
    box-shadow: var(--shadow-gold);
    background: linear-gradient(135deg,
        rgba(199, 159, 96, 0.1) 0%,
        var(--color-bg-surface) 100%);
}

/* Stat card icon */
.scarcity-stats-grid .stat-icon {
    font-size: 3em;
    margin-bottom: var(--spacing-sm);
    line-height: 1;
}

.scarcity-stats-grid .stat-card.blue .stat-icon {
    color: var(--color-primary);
}

.scarcity-stats-grid .stat-card.silver .stat-icon {
    color: var(--color-secondary);
}

.scarcity-stats-grid .stat-card.gold .stat-icon {
    color: var(--color-accent);
}

/* Stat card label */
.scarcity-stats-grid .stat-label {
    font-size: 0.95em;
    color: var(--color-text-tertiary);
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

/* Stat card value */
.scarcity-stats-grid .stat-value {
    font-size: 2.5em;
    font-weight: 300;
    color: var(--color-text-white);
    margin: var(--spacing-sm) 0;
    line-height: 1;
}

/* Stat card percentage */
.scarcity-stats-grid .stat-percentage {
    font-size: 1.2em;
    color: var(--color-text-secondary);
}

/* Forecast panel with gradient background */
.forecast-panel {
    max-width: 600px;
    margin: var(--spacing-2xl) auto 0;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, 
        rgba(74, 144, 226, 0.1) 0%, 
        rgba(199, 159, 96, 0.1) 100%);
    border-radius: var(--radius-lg);
    border: 2px solid var(--color-border-light);
    box-shadow: var(--shadow-medium);
    text-align: center;
    contain: layout style paint;
}

/* Forecast heading */
.forecast-heading {
    font-size: 1.3em;
    font-weight: 400;
    color: var(--color-text-white);
    letter-spacing: 1px;
    margin-bottom: var(--spacing-lg);
}

/* Forecast recommendation display */
.forecast-recommendation {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

/* Color indicator circle */
.forecast-color-indicator {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: inline-block;
    box-shadow: var(--shadow-medium);
    flex-shrink: 0;
}

/* Color name text */
.forecast-color-name {
    font-size: 2em;
    font-weight: 300;
    color: var(--color-text-white);
    letter-spacing: 1px;
}

/* Forecast rationale text */
.forecast-rationale {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: 1em;
    margin-top: var(--spacing-md);
}

/* Tablet breakpoint - 480px and up */
@media (min-width: 480px) {
    .scarcity-section {
        padding: var(--spacing-3xl) var(--spacing-lg);
    }
    
    .scarcity-chart {
        height: 250px;
    }
    
    .scarcity-stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .scarcity-stats-grid .stat-card {
        padding: 28px;
    }
    
    .scarcity-stats-grid .stat-icon {
        font-size: 3.2em;
    }
    
    .scarcity-stats-grid .stat-value {
        font-size: 2.8em;
    }
    
    .forecast-panel {
        padding: var(--spacing-2xl);
    }
    
    .forecast-color-indicator {
        width: 48px;
        height: 48px;
    }
    
    .forecast-color-name {
        font-size: 2.2em;
    }
}

/* Desktop breakpoint - 768px and up */
@media (min-width: 768px) {
    .scarcity-section {
        padding: var(--spacing-4xl) var(--spacing-xl);
    }
    
    .scarcity-section .section-heading {
        font-size: 2em;
        letter-spacing: 3px;
        margin-bottom: 20px;
    }
    
    .scarcity-section .section-description {
        font-size: 1.05em;
        margin-bottom: 60px;
    }
    
    .scarcity-chart-container {
        padding: var(--spacing-xl);
        margin: var(--spacing-3xl) auto;
    }
    
    .scarcity-chart {
        height: 300px;
    }
    
    .scarcity-stats-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
        margin: var(--spacing-3xl) 0;
    }
    
    .scarcity-stats-grid .stat-card {
        padding: 30px;
    }
    
    .scarcity-stats-grid .stat-icon {
        font-size: 3.5em;
    }
    
    .scarcity-stats-grid .stat-label {
        font-size: 1em;
    }
    
    .scarcity-stats-grid .stat-value {
        font-size: 3em;
    }
    
    .scarcity-stats-grid .stat-percentage {
        font-size: 1.3em;
    }
    
    .forecast-panel {
        padding: 50px;
    }
    
    .forecast-heading {
        font-size: 1.5em;
        letter-spacing: 2px;
    }
    
    .forecast-color-indicator {
        width: 56px;
        height: 56px;
    }
    
    .forecast-color-name {
        font-size: 2.5em;
    }
    
    .forecast-rationale {
        font-size: 1.05em;
        margin-top: 20px;
    }
}

/* Visible focus indicators for accessibility */
.scarcity-stats-grid .stat-card:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 4px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .scarcity-stats-grid .stat-card {
        transition: none !important;
    }
    
    .scarcity-stats-grid .stat-card:hover {
        transform: none !important;
    }
    
    /* Disable any animations that might be added via JavaScript */
    .scarcity-chart,
    .scarcity-stats-grid .stat-value,
    .forecast-panel {
        animation: none !important;
        transition: none !important;
    }
}

/* Mobile-specific touch enhancements */
@media (max-width: 479px) {
    .scarcity-stats-grid .stat-card {
        padding: 24px;
        min-height: 48px;
    }
    
    .forecast-panel {
        padding: 24px;
    }
    
    .forecast-color-name {
        font-size: 1.5em;
    }
}

/* ============================================
   SCARCITY CHART FALLBACK STYLES
   CSS-based visualization for browsers without canvas support
   ============================================ */

.scarcity-chart-fallback {
    width: 100%;
    padding: var(--spacing-md);
}

.fallback-bar {
    display: grid;
    grid-template-columns: 80px 1fr 120px;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.fallback-label {
    font-weight: bold;
    text-align: right;
    color: var(--color-text-primary);
}

.fallback-bar-fill {
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.fallback-bar-fill::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    transition: transform 0.8s cubic-bezier(0.33, 1, 0.68, 1);
}

.fallback-bar.blue .fallback-bar-fill::before {
    background: var(--color-primary);
}

.fallback-bar.silver .fallback-bar-fill::before {
    background: var(--color-secondary);
}

.fallback-bar.gold .fallback-bar-fill::before {
    background: var(--color-accent);
}

.fallback-value {
    color: var(--color-text-primary);
    font-weight: 500;
}

/* Reduced motion for fallback */
@media (prefers-reduced-motion: reduce) {
    .fallback-bar-fill::before {
        transition: none;
    }
}

/* Responsive adjustments for fallback */
@media (max-width: 768px) {
    .fallback-bar {
        grid-template-columns: 60px 1fr 100px;
        gap: var(--spacing-xs);
    }
}

@media (max-width: 480px) {
    .fallback-bar {
        grid-template-columns: 1fr;
        gap: var(--spacing-xs);
    }
    
    .fallback-label {
        text-align: left;
    }
    
    .fallback-value {
        margin-top: var(--spacing-xs);
    }
}

/* ============================================
   FOOTER ARTICLE LINK
   Styling for Nostr article link in footer
   ============================================ */

.footer-article-link {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-dark);
    text-align: center;
    font-size: 1.1em;
}

.footer-article-link a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.3s ease;
    border-bottom: 1px solid transparent;
}

.footer-article-link a:hover,
.footer-article-link a:focus {
    color: var(--color-primary-light);
    border-bottom-color: var(--color-primary-light);
}

/* Ensure responsive layout on mobile */
@media (max-width: 480px) {
    .footer-article-link {
        padding-top: var(--spacing-sm);
        margin-top: var(--spacing-sm);
        font-size: 1em;
    }
}