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

:root {
    --dark-bg: #0a0a0a;
    --dark-surface: #111111;
    --dark-elevated: #1a1a1a;
    --accent: #ffffff;
    --accent-muted: rgba(255, 255, 255, 0.7);
    --accent-subtle: rgba(255, 255, 255, 0.5);
    --accent-minimal: rgba(255, 255, 255, 0.3);
    --border-subtle: rgba(255, 255, 255, 0.1);
    --shadow-soft: rgba(0, 0, 0, 0.4);
    --shadow-medium: rgba(0, 0, 0, 0.6);
    --shadow-strong: rgba(0, 0, 0, 0.8);
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--dark-bg);
    min-height: 100vh;
    color: var(--accent);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.6;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.logo {
    max-width: 100%;
    height: auto;
    aspect-ratio: 495/168;
    object-fit: contain;
    object-position: center;
    margin: 0 auto var(--spacing-md);
    display: block;
    filter: drop-shadow(0 4px 12px var(--shadow-soft));
    transition: transform 0.4s var(--transition-smooth), filter 0.4s var(--transition-smooth);
}

.logo:hover {
    transform: translateY(-2px);
    filter: drop-shadow(0 8px 20px var(--shadow-medium));
}

.logo-text {
    color: var(--accent-muted);
    font-size: 0.95rem;
    font-weight: 300;
    text-align: center;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.02em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.logo-text a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.3s var(--transition-smooth), opacity 0.3s var(--transition-smooth);
    border-bottom: 1px solid transparent;
    padding-bottom: 1px;
}

.logo-text a:hover {
    color: var(--accent);
    opacity: 0.8;
    border-bottom-color: var(--accent-minimal);
}

.gallery-sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.section-wrapper {
    display: flex;
    flex-direction: column;
    margin-bottom: var(--spacing-md);
}

.section-wrapper h2 {
    color: var(--accent);
    font-size: 1.75rem;
    font-weight: 300;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    font-weight: 400;
}

.section-wrapper h3 {
    color: var(--accent-muted);
    font-size: 0.9rem;
    font-weight: 300;
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.01em;
    max-width: 95%;
}

.section-card {
    position: relative;
    aspect-ratio: 16/10;
    border-radius: 2px;
    overflow: hidden;
    cursor: pointer;
    background: var(--dark-surface);
    transition: transform 0.5s var(--transition-smooth), 
                box-shadow 0.5s var(--transition-smooth),
                opacity 0.3s var(--transition-smooth);
    border: 1px solid #ffffff;
    box-shadow: 0 4px 20px var(--shadow-soft);
    background-size: cover
}

.section-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, 
        rgba(0, 0, 0, 0) 0%, 
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.7) 100%);
    opacity: 0;
    transition: opacity 0.4s var(--transition-smooth);
    z-index: 1;
    pointer-events: none;
}

.section-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 40px var(--shadow-medium);
    border-color: var(--accent-minimal);
}

.section-card:hover::before {
    opacity: 1;
}

.section-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.4s var(--transition-smooth);
    z-index: 2;
}

.section-card:hover .section-overlay {
    background: rgba(0, 0, 0, 0.4);
}

.section-overlay h2 {
    color: var(--accent);
    font-size: 1.5rem;
    font-weight: 300;
    text-align: center;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: var(--spacing-sm);
    opacity: 0.95;
    transition: opacity 0.3s var(--transition-smooth);
}

.section-card:hover .section-overlay h2 {
    opacity: 1;
}

/* Thumbnail Gallery */
.thumbnail-gallery {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    display: none;
    flex-direction: column;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.thumbnail-gallery.active {
    display: flex;
    animation: fadeIn 0.3s var(--transition-smooth);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.gallery-title {
    color: var(--accent);
    font-size: 2rem;
    font-weight: 300;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-subtle);
}

.close-btn {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-subtle);
    color: var(--accent);
    font-size: 2rem;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s var(--transition-smooth);
    z-index: 1001;
    line-height: 1;
    padding: 0;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.close-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-minimal);
    transform: rotate(90deg);
}

.thumbnails-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: var(--spacing-md);
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
}

.thumbnail {
    aspect-ratio: 1;
    border-radius: 2px;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.4s var(--transition-smooth), 
                box-shadow 0.4s var(--transition-smooth);
    box-shadow: 0 4px 16px var(--shadow-soft);
    border: 1px solid var(--border-subtle);
    background: var(--dark-surface);
}

.thumbnail:hover {
    transform: scale(1.03) translateY(-4px);
    box-shadow: 0 8px 32px var(--shadow-medium);
    border-color: var(--accent-minimal);
}

.thumbnail img,
.thumbnail video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s var(--transition-smooth);
}

.thumbnail:hover img,
.thumbnail:hover video {
    transform: scale(1.05);
}

.thumbnail video {
    pointer-events: none;
}

.play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    font-size: 20px;
    pointer-events: none;
    z-index: 10;
    border: 1px solid var(--border-subtle);
    transition: all 0.3s var(--transition-smooth);
}

.thumbnail:hover .play-icon {
    background: rgba(0, 0, 0, 0.8);
    transform: translate(-50%, -50%) scale(1.1);
}

/* Fullscreen Viewer */
.fullscreen-viewer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(10, 10, 10, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    touch-action: pan-y;
}

.fullscreen-viewer.active {
    display: flex;
    animation: fadeIn 0.3s var(--transition-smooth);
}

.image-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

#fullscreenImage,
#fullscreenVideo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    user-select: none;
    -webkit-user-drag: none;
}

#fullscreenVideo {
    width: 100%;
    height: 100%;
}

.nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--border-subtle);
    color: var(--accent);
    font-size: 3rem;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s var(--transition-smooth);
    z-index: 2001;
    line-height: 1;
    padding: 0;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-minimal);
    transform: translateY(-50%) scale(1.1);
}

.nav-prev {
    left: var(--spacing-md);
}

.nav-next {
    right: var(--spacing-md);
}

.image-counter {
    position: absolute;
    bottom: var(--spacing-md);
    left: 50%;
    transform: translateX(-50%);
    color: var(--accent);
    font-size: 0.9rem;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    border: 1px solid var(--border-subtle);
    letter-spacing: 0.05em;
}

.fullscreen-close {
    top: var(--spacing-md);
    right: var(--spacing-md);
}

/* Loading Animation */
.thumbnail.loading {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0.03) 25%, 
        rgba(255, 255, 255, 0.06) 50%, 
        rgba(255, 255, 255, 0.03) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .gallery-sections {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: var(--spacing-md);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    header {
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md) 0;
    }
    
    .logo {
        margin-bottom: var(--spacing-sm);
    }
    
    .logo-text {
        font-size: 0.85rem;
        padding: 0 var(--spacing-sm);
    }
    
    .gallery-sections {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    .section-wrapper h2 {
        font-size: 1.5rem;
    }
    
    .section-wrapper h3 {
        font-size: 0.85rem;
        margin-bottom: var(--spacing-sm);
    }
    
    .section-overlay h2 {
        font-size: 1.25rem;
    }
    
    .thumbnails-container {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }
    
    .nav-btn {
        width: 48px;
        height: 48px;
        font-size: 2.5rem;
    }
    
    .nav-prev {
        left: var(--spacing-sm);
    }
    
    .nav-next {
        right: var(--spacing-sm);
    }
    
    .gallery-title {
        font-size: 1.5rem;
        margin-bottom: var(--spacing-md);
    }
    
    .close-btn {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        width: 44px;
        height: 44px;
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .section-wrapper h2 {
        font-size: 1.25rem;
    }
    
    .section-wrapper h3 {
        font-size: 0.8rem;
    }
    
    .thumbnails-container {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }
}

/* Smooth scrollbar */
.thumbnail-gallery::-webkit-scrollbar,
body::-webkit-scrollbar {
    width: 8px;
}

.thumbnail-gallery::-webkit-scrollbar-track,
body::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

.thumbnail-gallery::-webkit-scrollbar-thumb,
body::-webkit-scrollbar-thumb {
    background: var(--accent-minimal);
    border-radius: 4px;
}

.thumbnail-gallery::-webkit-scrollbar-thumb:hover,
body::-webkit-scrollbar-thumb:hover {
    background: var(--accent-subtle);
}