:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --bg: #0f0f0f;
    --bg-card: #1a1a1a;
    --bg-hover: #252525;
    --text: #ffffff;
    --text-muted: #a1a1aa;
    --border: #2a2a2a;
    --success: #22c55e;
    --error: #ef4444;
    --radius: 12px;
    --radius-lg: 16px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 40px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-light);
}

.logo svg {
    color: var(--primary);
}

.event-info {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Loading */
.loading {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Error state */
.error-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 16px;
    text-align: center;
    color: var(--text-muted);
}

.error-state svg {
    color: var(--error);
}

.error-state h2 {
    color: var(--text);
    font-size: 1.5rem;
}

/* Gallery */
.gallery {
    flex: 1;
}

.gallery-header {
    text-align: center;
    margin-bottom: 40px;
}

.gallery-header h1 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1rem;
}

/* Photos Grid */
.photos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.photo-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform 0.2s, box-shadow 0.2s;
}

.photo-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.photo-wrapper {
    position: relative;
    aspect-ratio: 3/2;
    cursor: pointer;
    overflow: hidden;
}

.photo-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.photo-card:hover .photo-wrapper img {
    transform: scale(1.05);
}

.photo-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, transparent 50%);
    opacity: 0;
    transition: opacity 0.2s;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding: 16px;
}

.photo-card:hover .photo-overlay {
    opacity: 1;
}

.photo-overlay .btn {
    transform: translateY(10px);
    transition: transform 0.2s;
}

.photo-card:hover .photo-overlay .btn {
    transform: translateY(0);
}

/* Variations */
.photo-variations {
    padding: 12px;
    display: flex;
    gap: 8px;
    overflow-x: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.photo-variations::-webkit-scrollbar {
    height: 4px;
}

.photo-variations::-webkit-scrollbar-track {
    background: transparent;
}

.photo-variations::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.variation-thumb {
    width: 60px;
    height: 40px;
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    flex-shrink: 0;
    transition: border-color 0.2s;
}

.variation-thumb:hover,
.variation-thumb.active {
    border-color: var(--primary);
}

.variation-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.variation-label {
    position: absolute;
    bottom: 2px;
    left: 2px;
    right: 2px;
    font-size: 8px;
    text-align: center;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 1px 3px;
    border-radius: 2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius);
    border: none;
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-hover);
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-large {
    padding: 14px 28px;
    font-size: 1rem;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.8rem;
}

/* Download all section */
.download-all-section {
    text-align: center;
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

/* Footer */
.footer {
    text-align: center;
    padding: 24px 0;
    margin-top: auto;
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer strong {
    color: var(--primary-light);
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.lightbox.active {
    display: flex;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text);
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 10;
}

.lightbox-close:hover {
    background: var(--bg-hover);
}

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text);
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 10;
}

.lightbox-nav:hover {
    background: var(--bg-hover);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.lightbox-content img {
    max-width: 100%;
    max-height: calc(85vh - 60px);
    object-fit: contain;
    border-radius: var(--radius);
}

.lightbox-actions {
    display: flex;
    gap: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .gallery-header h1 {
        font-size: 1.5rem;
    }

    .photos-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .lightbox-nav {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .lightbox-prev {
        left: 10px;
    }

    .lightbox-next {
        right: 10px;
    }
}

/* Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.photo-card {
    animation: fadeIn 0.4s ease-out forwards;
}

.photo-card:nth-child(1) { animation-delay: 0.05s; }
.photo-card:nth-child(2) { animation-delay: 0.1s; }
.photo-card:nth-child(3) { animation-delay: 0.15s; }
.photo-card:nth-child(4) { animation-delay: 0.2s; }
.photo-card:nth-child(5) { animation-delay: 0.25s; }
.photo-card:nth-child(6) { animation-delay: 0.3s; }