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

:root {
    /* Light theme variables */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --accent-primary: #3b82f6;
    --accent-hover: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --sidebar-bg: #fefefe;
    --card-bg: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

[data-theme="dark"] {
    /* Dark theme variables */
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --accent-primary: #3b82f6;
    --accent-hover: #60a5fa;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --sidebar-bg: #1e293b;
    --card-bg: #1e293b;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Header Styles */
.header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Search Styles */
.search-container {
    position: relative;
    min-width: 300px;
}

.search-input {
    width: 100%;
    padding: 0.5rem 1rem 0.5rem 2.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

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

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

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

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

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

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-icon {
    padding: 0.5rem;
    background-color: transparent;
    color: var(--text-secondary);
}

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

.btn-small {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}

.btn-link {
    background: none;
    border: none;
    color: var(--accent-primary);
    cursor: pointer;
    font-size: 0.875rem;
    text-decoration: underline;
}

.btn-link:hover {
    color: var(--accent-hover);
}

/* Layout Styles */
.main-container {
    display: flex;
    height: calc(100vh - 73px);
}

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 1.5rem 1rem 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.category-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.category-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    border-radius: 0;
    margin: 0 0.5rem;
    border-radius: var(--radius-sm);
}

.category-item:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.category-item.active {
    background-color: var(--accent-primary);
    color: white;
}

.category-icon {
    font-size: 1rem;
}

.category-name {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
}

.category-count {
    font-size: 0.75rem;
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.125rem 0.375rem;
    border-radius: 10px;
    min-width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.storage-info {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* Content Area Styles */
.content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.content-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.view-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.current-category {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.sort-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.sort-controls label {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.sort-select {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: var(--card-bg);
    color: var(--text-primary);
    font-size: 0.875rem;
}

/* Prompts Grid */
.prompts-grid {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
    align-content: start;
}

/* Empty State */
.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.empty-state p {
    margin-bottom: 1.5rem;
}

/* Prompt Card Styles */
.prompt-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.prompt-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    border-color: var(--accent-primary);
}

.prompt-card.selected {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
}

.card-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.25rem;
}

.card-copy-btn {
    background: none;
    border: none;
    font-size: 1rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    min-height: 24px;
}

.card-copy-btn:hover {
    background-color: var(--bg-secondary);
    color: var(--accent-primary);
    transform: scale(1.1);
}

.card-copy-btn:active {
    transform: scale(0.95);
}

.prompt-card:hover .card-copy-btn {
    opacity: 1;
}

.card-favorite {
    color: var(--warning-color);
    font-size: 1.25rem;
    opacity: 0;
    transition: opacity 0.2s ease;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}

.card-favorite:hover {
    background-color: var(--bg-secondary);
    transform: scale(1.1);
}

.prompt-card:hover .card-favorite,
.prompt-card .card-favorite.active {
    opacity: 1;
}

.card-content {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-meta {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.card-tags {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.tag {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.modal-header {
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
}

.modal-close:hover {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
    overflow-y: auto;
    flex: 1;
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: inherit;
    transition: border-color 0.2s ease;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    line-height: 1.5;
}

.form-textarea.expanded {
    min-height: 300px;
}

.textarea-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.form-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.favorite-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.favorite-toggle input[type="checkbox"] {
    display: none;
}

.favorite-star {
    font-size: 1.25rem;
    opacity: 0.3;
    transition: all 0.2s ease;
}

.favorite-toggle input[type="checkbox"]:checked + .favorite-star {
    opacity: 1;
    color: var(--warning-color);
}

.button-group {
    display: flex;
    gap: 0.75rem;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    min-width: 150px;
    display: none;
    overflow: hidden;
}

.context-menu.show {
    display: block;
}

.context-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    cursor: pointer;
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: background-color 0.2s ease;
}

.context-item:hover {
    background-color: var(--bg-secondary);
}

.context-item.danger {
    color: var(--danger-color);
}

.context-item.danger:hover {
    background-color: rgba(239, 68, 68, 0.1);
}

.context-separator {
    height: 1px;
    background-color: var(--border-color);
    margin: 0.25rem 0;
}

.context-icon {
    font-size: 1rem;
}

/* Settings Styles */
.settings-section {
    margin-bottom: 2rem;
}

.settings-section h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.setting-item {
    margin-bottom: 1.5rem;
}

.setting-desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.5rem;
    margin-bottom: 0;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
}

.stat-item {
    text-align: center;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    .header-left {
        flex: 1;
        min-width: 200px;
    }
    
    .header-right {
        flex: 1;
        justify-content: flex-end;
    }
    
    .search-container {
        min-width: 200px;
        order: 3;
        flex-basis: 100%;
    }
    
    .main-container {
        flex-direction: column;
        height: auto;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        max-height: 200px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .category-nav {
        flex-direction: row;
        overflow-x: auto;
        overflow-y: hidden;
        padding: 1rem;
    }
    
    .category-item {
        white-space: nowrap;
        margin: 0 0.25rem;
    }
    
    .prompts-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }
    
    .modal-content {
        width: 95%;
        max-height: 95vh;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .button-group {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .header {
        padding: 0.75rem;
    }
    
    .logo {
        font-size: 1.25rem;
    }
    
    .content-header {
        padding: 1rem;
    }
    
    .view-controls {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .current-category {
        font-size: 1.25rem;
    }
    
    .modal-content {
        border-radius: 0;
        height: 100vh;
        max-height: 100vh;
        width: 100%;
    }
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.2s ease-in-out;
}

.slide-up {
    animation: slideUp 0.3s ease-out;
}

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

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scrollbar Styles */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Drag and Drop Styles */
.prompt-card.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
    z-index: 1000;
}

.category-item.drag-hover {
    background-color: var(--accent-primary) !important;
    color: white !important;
    transform: scale(1.02);
}

.category-item.drag-hover .category-count {
    background-color: rgba(255, 255, 255, 0.3);
}

/* Drag feedback */
.prompt-card[draggable="true"] {
    cursor: grab;
}

.prompt-card[draggable="true"]:active {
    cursor: grabbing;
}

/* Selection Styles */
::selection {
    background-color: var(--accent-primary);
    color: white;
}

/* Focus Styles for Accessibility */
.btn:focus-visible,
.category-item:focus-visible,
.prompt-card:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .sidebar,
    .header,
    .modal {
        display: none !important;
    }
    
    .content {
        margin: 0;
        padding: 0;
    }
    
    .prompt-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ccc;
        margin-bottom: 1rem;
    }
}