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

:root {
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #18181b;
    --bg-hover: #27272a;
    --border-color: #27272a;
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #22c55e;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --transition: 150ms ease;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 16px 24px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
    flex-shrink: 0;
}

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

.search-container {
    flex: 1;
    max-width: 480px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-container input {
    width: 100%;
    padding: 10px 16px 10px 42px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.search-container input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.search-container input::placeholder {
    color: var(--text-muted);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-shrink: 0;
}

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-icon:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.image-count {
    font-size: 13px;
    color: var(--text-muted);
}

/* Main Content */
.main {
    display: flex;
    flex: 1;
    position: relative;
}

.content {
    flex: 1;
    padding: 24px;
    overflow-y: auto;
}

/* Loading */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 64px;
    color: var(--text-muted);
}

.spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    padding: 64px;
    color: var(--text-muted);
}

/* Image Grid */
.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 16px;
}

.image-grid.list-view {
    grid-template-columns: 1fr;
    gap: 8px;
}

.image-card {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
    aspect-ratio: 4/3;
}

.image-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition);
}

.image-card:hover img {
    transform: scale(1.02);
}

.image-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 16px;
}

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

.image-card-name {
    font-size: 13px;
    font-weight: 500;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.image-card-actions button {
    padding: 6px 12px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border: none;
    border-radius: 6px;
    color: white;
    font-size: 12px;
    cursor: pointer;
    transition: background var(--transition);
}

.image-card-actions button:hover {
    background: rgba(255,255,255,0.25);
}

.image-card .has-notes {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 24px;
    height: 24px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-card .has-notes svg {
    width: 12px;
    height: 12px;
    color: white;
}

/* List View */
.list-view .image-card {
    aspect-ratio: auto;
    display: flex;
    flex-direction: row;
    height: 80px;
}

.list-view .image-card img {
    width: 120px;
    height: 100%;
    flex-shrink: 0;
}

.list-view .image-card-overlay {
    position: relative;
    opacity: 1;
    background: transparent;
    flex: 1;
    justify-content: center;
    padding: 16px 20px;
}

.list-view .image-card-name {
    color: var(--text-primary);
}

/* Sidebar */
.sidebar {
    width: 400px;
    background: var(--bg-secondary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    position: fixed;
    right: 0;
    top: 69px;
    bottom: 0;
    z-index: 90;
}

.sidebar.open {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h3 {
    font-size: 14px;
    font-weight: 600;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.sidebar-image {
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 16px;
}

.sidebar-image img {
    width: 100%;
    height: auto;
    display: block;
}

.sidebar-details {
    margin-bottom: 20px;
}

.image-name {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 4px;
    word-break: break-all;
}

.image-meta {
    font-size: 12px;
    color: var(--text-muted);
}

.notes-section,
.tags-section {
    margin-bottom: 20px;
}

.notes-section label,
.tags-section label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.notes-section textarea {
    width: 100%;
    min-height: 120px;
    padding: 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    outline: none;
    transition: border-color var(--transition);
}

.notes-section textarea:focus {
    border-color: var(--accent);
}

.notes-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 12px;
}

.btn-primary {
    padding: 8px 16px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius);
    color: white;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition);
}

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

.btn-secondary {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

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

.save-status {
    font-size: 12px;
    color: var(--success);
}

.tags-input-container {
    display: flex;
    gap: 8px;
    margin-bottom: 12px;
}

.tags-input-container input {
    flex: 1;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
}

.tags-input-container input:focus {
    border-color: var(--accent);
}

.btn-small {
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-small:hover {
    background: var(--bg-hover);
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: var(--bg-tertiary);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.tag button {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 14px;
    height: 14px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
}

.tag button:hover {
    color: var(--text-primary);
}

/* Lightbox */
.lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.95);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.open {
    opacity: 1;
    visibility: visible;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

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

.lightbox-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.lightbox-nav:hover {
    background: rgba(255,255,255,0.2);
}

.lightbox-prev {
    left: 20px;
}

.lightbox-next {
    right: 20px;
}

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

.lightbox-content img {
    max-width: 100%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: var(--radius);
}

.lightbox-info {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px 20px;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    border-radius: var(--radius-lg);
}

.lightbox-info span {
    font-size: 14px;
    color: white;
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .search-container {
        order: 3;
        max-width: none;
        width: 100%;
    }
    
    .sidebar {
        width: 100%;
    }
    
    .image-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }
    
    .lightbox-nav {
        width: 40px;
        height: 40px;
    }
}