/* CSS Custom Properties - Dark Theme Only */
:root {
    --color-primary: #ffffff;
    --color-secondary: #000000;
    --color-gray-100: #171717;
    --color-gray-200: #262626;
    --color-gray-300: #404040;
    --color-gray-400: #525252;
    --color-gray-500: #737373;
    --color-gray-600: #a3a3a3;
    --color-gray-700: #d4d4d4;
    --color-gray-800: #e5e5e5;
    --color-gray-900: #f5f5f5;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    --border-radius: 0.25rem;
    --transition-fast: 0.15s ease-out;
    --transition-medium: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    --z-index-dropdown: 1000;
    --z-index-modal: 9999;
    --z-index-preloader: 10000;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-primary);
    background-color: var(--color-secondary);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.no-scroll {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* Focus Styles for Accessibility */
*:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

button:focus,
a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Preloader */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-index-preloader);
    opacity: 1;
    visibility: visible;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.preloader-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-gray-200);
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-md);
}

.preloader-text {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-gray-600);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--color-secondary);
    z-index: var(--z-index-dropdown);
    padding: var(--spacing-lg) var(--spacing-xl);
    transition: transform var(--transition-medium);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 1400px;
    margin: 0 auto;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    text-align: center;
    cursor: pointer;
    transition: color var(--transition-medium);
    border: none;
    background: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
}

.logo:hover {
    color: var(--color-gray-300);
}

.logo:focus,
.logo:active {
    outline: none;
    color: var(--color-gray-300);
}



/* Main Content */
.main {
    padding-top: 80px;
    min-height: 100vh;
}

.gallery-section {
    padding: 0;
}

.gallery-container {
    max-width: 100%;
    margin: 0;
}

/* Gallery Grid */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 0;
    padding: 0;
}

.gallery-item {
    position: relative;
    cursor: pointer;
    overflow: hidden;
    border-radius: 0;
    background-color: var(--color-gray-100);
    aspect-ratio: 4/3;
    transition: transform var(--transition-medium), box-shadow var(--transition-medium);
    will-change: transform;
    touch-action: manipulation;
    border: none;
    outline: none;
    padding: 0;
    margin: 0;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.gallery-item:focus,
.gallery-item:active,
.gallery-item:focus-visible,
.gallery-item:focus-within {
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
    background-color: var(--color-gray-100) !important;
}

.gallery-item::before,
.gallery-item::after {
    display: none !important;
}



.gallery-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
    will-change: transform;
    border: none;
    outline: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.gallery-image:focus,
.gallery-image:active,
.gallery-image:focus-visible {
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
}



.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        180deg,
        transparent 0%,
        transparent 60%,
        rgba(0, 0, 0, 0.7) 100%
    );
    opacity: 0;
    transition: opacity var(--transition-medium);
    display: flex;
    align-items: flex-end;
    padding: var(--spacing-lg);
}

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

.gallery-caption {
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    letter-spacing: 0.025em;
    line-height: 1.4;
}

.gallery-caption-meta {
    color: var(--color-primary);
    font-size: var(--font-size-xs);
    font-weight: 400;
    margin-top: 4px;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* Fullscreen Modal */
.fullscreen-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-secondary);
    z-index: var(--z-index-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
    touch-action: manipulation;
}

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

.fullscreen-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 20px 80px 20px;
    box-sizing: border-box;
}

/* Mobile fullscreen - no padding */
@media (max-width: 768px) {
    .fullscreen-content {
        padding: 0;
        align-items: center;
        justify-content: center;
    }
}

.fullscreen-close {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    backdrop-filter: blur(10px);
    z-index: 10;
}

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

.fullscreen-image-container {
    position: relative;
    width: 90vw;
    height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    touch-action: pan-x pan-y pinch-zoom;
}

/* Mobile fullscreen container */
@media (max-width: 768px) {
    .fullscreen-image-container {
        width: 100vw;
        height: 100vh;
        position: relative;
        align-items: center;
        justify-content: center;
    }
}

.fullscreen-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    transition: transform var(--transition-fast);
    will-change: transform;
    user-select: none;
    -webkit-user-drag: none;
    display: block;
}

/* Mobile fullscreen image */
@media (max-width: 768px) {
    .fullscreen-image {
        width: 100vw;
        max-width: 100vw;
        height: auto;
        max-height: 100vh;
        object-fit: contain;
        object-position: center center;
    }
}

.fullscreen-navigation {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 80px;
    display: flex;
    justify-content: space-between;
    pointer-events: none;
}

.nav-zone {
    width: 30%;
    height: 100%;
    pointer-events: auto;
    cursor: pointer;
    background: transparent;
    border: none;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    margin: 0;
}

.nav-zone:hover,
.nav-zone:focus,
.nav-zone:active,
.nav-zone:focus-visible {
    background: transparent !important;
    outline: none !important;
    border: none !important;
    box-shadow: none !important;
}

.nav-zone:disabled {
    cursor: not-allowed;
    background: transparent;
}

/* Remove all button styling from nav zones */
.nav-zone {
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    -webkit-tap-highlight-color: transparent;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.nav-zone::before,
.nav-zone::after {
    display: none !important;
}

/* About Modal */
.about-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-secondary);
    z-index: var(--z-index-modal);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

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

.about-content {
    position: relative;
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: var(--spacing-xl);
}

.about-close {
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 48px;
    height: 48px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    color: var(--color-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), transform var(--transition-fast);
    z-index: 10;
}

.about-close:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.about-close:focus,
.about-close:active {
    outline: none;
    background: rgba(255, 255, 255, 0.1);
}

.about-text {
    padding-top: var(--spacing-xl);
}

.about-text h2 {
    font-size: 2.5rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    color: var(--color-primary);
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

/* Mobile styles for about page title */
@media (max-width: 768px) {
    .about-text h2 {
        font-size: 1.8rem;
    }
}

@media (max-width: 600px) {
    .about-text h2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 480px) {
    .about-text h2 {
        font-size: 1.3rem;
    }
}

.about-section {
    margin-bottom: var(--spacing-xl);
}

.about-section h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

.about-section p {
    font-size: var(--font-size-base);
    line-height: 1.7;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

.about-section a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.about-section a:hover {
    color: var(--color-gray-300);
}

/* Header animation for about page */
.header.about-open {
    transform: translateY(-100%);
}

.main.about-open {
    opacity: 0;
    pointer-events: none;
}

/* Hidden navigation buttons - kept for fallback */
.nav-btn {
    display: none;
}

.fullscreen-info {
    position: absolute;
    bottom: var(--spacing-xl);
    left: var(--spacing-xl);
    right: var(--spacing-xl);
    text-align: center;
    color: var(--color-primary);
}

.fullscreen-caption {
    font-size: var(--font-size-lg);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.fullscreen-meta {
    font-size: var(--font-size-sm);
    color: var(--color-primary);
    opacity: 0.8;
}

/* Loading Indicator */
.loading-indicator {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: rgba(0, 0, 0, 0.8);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    z-index: var(--z-index-dropdown);
}

.loading-indicator.visible {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid var(--color-secondary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .logo {
        font-size: 1.3rem;
        white-space: nowrap;
    }
    
    .main {
        padding-top: 70px;
    }
    
    .gallery-section {
        padding: 0;
    }
    
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 0;
    }
    
    .fullscreen-close,
    .nav-btn {
        width: 40px;
        height: 40px;
    }
    
    .fullscreen-close {
        top: var(--spacing-lg);
        right: var(--spacing-lg);
    }
    
    .fullscreen-navigation {
        padding: 0 var(--spacing-lg);
    }
    
    .fullscreen-info {
        bottom: var(--spacing-lg);
        left: var(--spacing-lg);
        right: var(--spacing-lg);
    }
    
    .fullscreen-caption {
        font-size: var(--font-size-base);
    }
    
    .fullscreen-meta {
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 600px) {
    .logo {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.1rem;
    }
    
    .header {
        padding: var(--spacing-md) var(--spacing-md);
    }
    
    .gallery {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 0;
    }
    
    .gallery-section {
        padding: 0;
    }
    
}



/* High DPI Display Optimization */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .gallery-image {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* Dark Theme - Always Active */

/* Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}

/* Print Styles */
@media print {
    .header,
    .fullscreen-modal,
    .loading-indicator {
        display: none;
    }
    
    .gallery {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
    
    .gallery-item {
        page-break-inside: avoid;
    }
}