:root {
    --bg-base: #0B0B0F;
    --bg-surface: #13141C;
    --bg-surface-hover: #1A1C26;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-highlight: rgba(138, 43, 226, 0.5);
    
    --text-primary: #FFFFFF;
    --text-secondary: #9BA1B0;
    --text-muted: #565B68;
    
    --accent-primary: #8A2BE2; /* Blue Violet */
    --accent-secondary: #4169E1; /* Royal Blue */
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    
    --danger: #FF4757;
    --success: #2ED573;
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    --shadow-glow: 0 0 20px rgba(138, 43, 226, 0.2);
    --shadow-panel: 0 8px 32px rgba(0, 0, 0, 0.4);
    
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    height: 100vh;
    overflow: hidden;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: 'Outfit', sans-serif;
    font-weight: 600;
}

.text-accent {
    color: var(--accent-primary);
}

.link-helper {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.9rem;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.link-helper:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

/* Layout */
.app-layout {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.logo i {
    font-size: 2rem;
    color: var(--accent-primary);
    filter: drop-shadow(0 0 8px rgba(138, 43, 226, 0.6));
}

.logo h1 {
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.sidebar-nav {
    margin-bottom: 2rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-weight: 500;
}

.nav-item i {
    font-size: 1.25rem;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
}

.nav-item.active {
    background: rgba(138, 43, 226, 0.15);
    color: var(--accent-primary);
}

.sidebar-section {
    flex-grow: 1;
    overflow-y: auto;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0 0.5rem;
}

.section-header h3 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.project-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.project-item {
    display: flex;
    align-items: center;
    position: relative;
}

.project-item .nav-item {
    flex-grow: 1;
    padding-right: 3rem;
}

.project-actions {
    position: absolute;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: var(--transition);
}

.project-item:hover .project-actions {
    opacity: 1;
}

.project-actions button {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1rem;
    padding: 0.2rem;
    border-radius: 4px;
}

.project-actions button:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.project-actions button.danger:hover {
    color: var(--danger);
    background: rgba(255, 71, 87, 0.1);
}

.sidebar-footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.w-100 {
    width: 100%;
}

/* Main Content */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 2.5rem 3rem;
    background: var(--bg-base);
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.main-header h2 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
}

.view-desc {
    color: var(--text-secondary);
}

/* Buttons */
button {
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    border: none;
    outline: none;
    transition: var(--transition);
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 25px rgba(138, 43, 226, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.btn-icon, .btn-icon-small {
    background: var(--bg-surface);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: grid;
    place-items: center;
}

.btn-icon {
    width: 40px;
    height: 40px;
    font-size: 1.25rem;
}

.btn-icon-small {
    width: 28px;
    height: 28px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
    background: transparent;
    border: none;
}

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

.btn-icon-small:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

.btn-icon.danger:hover {
    color: var(--danger);
    border-color: var(--danger);
    background: rgba(255, 71, 87, 0.1);
}

.btn-small {
    background: var(--bg-surface-hover);
    color: var(--text-secondary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-small:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.1);
}

/* Search */
.search-bar {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    transition: var(--transition);
}

.search-bar:focus-within {
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-glow);
}

.search-bar i {
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.search-bar input {
    background: transparent;
    border: none;
    color: var(--text-primary);
    width: 100%;
    font-size: 1rem;
    outline: none;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-surface);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
}

.empty-state.hidden {
    display: none;
}

.empty-icon {
    font-size: 3rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.empty-state h2 {
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

/* Grid */
.prompt-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    padding-bottom: 2rem;
}

/* Card */
.prompt-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    position: relative;
}

.prompt-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-highlight);
    box-shadow: var(--shadow-panel);
}

.card-quick-copy {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: rgba(11, 11, 15, 0.7);
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    z-index: 10;
    opacity: 0;
    transition: var(--transition);
}

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

.card-quick-copy:hover {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    color: white;
}

.card-image {
    width: 100%;
    height: 160px;
    object-fit: cover;
    object-position: top center;
    background: #000;
}

.card-image-placeholder {
    width: 100%;
    height: 160px;
    background: linear-gradient(to bottom right, #1a1a2e, #16213e);
    display: grid;
    place-items: center;
    color: var(--text-muted);
    font-size: 2rem;
}

.card-content {
    padding: 1.25rem;
    flex-grow: 1;
}

.card-title {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.card-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 1rem;
}

.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    background: rgba(138, 43, 226, 0.15);
    color: #DDA0DD;
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.1);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(11, 11, 15, 0.8);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    opacity: 1;
    transition: var(--transition);
    padding: 1rem;
}

.modal-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-panel);
    transform: scale(1);
    transition: var(--transition);
}

.modal-overlay.hidden .modal-content {
    transform: scale(0.95);
}

.modal-content.large {
    max-width: 1000px;
}

.modal-content.small {
    max-width: 400px;
}

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

.detail-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-close {
    background: transparent;
    color: var(--text-secondary);
    font-size: 1.5rem;
}

.btn-close:hover {
    color: var(--text-primary);
}

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

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group textarea,
.form-select {
    width: 100%;
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(138, 43, 226, 0.2);
}

.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%239BA1B0%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem top 50%;
    background-size: 0.65rem auto;
}

.form-select option {
    background: var(--bg-surface);
    color: var(--text-primary);
}

.help-text {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 0.4rem;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

/* Image Upload */
.image-upload-container {
    background: var(--bg-base);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.image-upload-container:hover {
    border-color: var(--accent-primary);
    background: rgba(138, 43, 226, 0.05);
}

.image-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.image-preview i {
    font-size: 2rem;
}

.image-preview img {
    max-width: 100%;
    max-height: 200px;
    border-radius: var(--radius-sm);
    object-fit: contain;
}

/* Detail Layout */
.detail-layout {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 2rem;
}

@media (max-width: 800px) {
    .detail-layout {
        grid-template-columns: 1fr;
    }
}

.detail-image-container {
    margin-bottom: 1.5rem;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: #000;
    display: flex;
    justify-content: center;
}

.detail-image-container img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.detail-image-container.hidden {
    display: none;
}

.detail-tags {
    margin-bottom: 1.5rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.prompt-text-container {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

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

.prompt-header h3 {
    font-size: 1rem;
    color: var(--text-secondary);
}

.prompt-text-display {
    white-space: pre-wrap;
    font-size: 1rem;
    line-height: 1.6;
}

/* AI Panel */
.ai-panel {
    background: rgba(138, 43, 226, 0.03);
    border: 1px solid var(--border-highlight);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.ai-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.ai-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.ai-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-ai {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    text-align: left;
    display: grid;
    grid-template-columns: auto 1fr;
    grid-template-rows: auto auto;
    column-gap: 1rem;
    align-items: center;
}

.btn-ai:hover {
    background: rgba(138, 43, 226, 0.1);
    border-color: var(--accent-primary);
}

.btn-ai i {
    grid-row: 1 / 3;
    font-size: 1.5rem;
    color: var(--accent-primary);
}

.btn-ai span {
    font-weight: 600;
    color: var(--text-primary);
}

.btn-ai small {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

/* AI Result */
.ai-result-container {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.ai-result-container.hidden {
    display: none;
}

.ai-result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.ai-result-header h4 {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.ai-result-text {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    font-family: 'Inter', monospace;
    font-size: 0.9rem;
    white-space: pre-wrap;
    overflow-y: auto;
    flex-grow: 1;
    max-height: 300px;
}

.ai-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--accent-primary);
}

.ai-loading.hidden {
    display: none;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(138, 43, 226, 0.3);
    border-radius: 50%;
    border-top-color: var(--accent-primary);
    animation: spin 1s ease-in-out infinite;
}

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

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-surface-hover);
    border-radius: 4px;
}

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


/* Local data file status indicator */
.data-file-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.5rem 0.25rem;
    margin-bottom: 0.5rem;
    overflow: hidden;
}
.data-file-status i { flex-shrink: 0; }
.data-file-status span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.data-file-status.saved { color: #4ade80; }
.data-file-status.saving { color: var(--text-secondary); opacity: 0.7; }
.data-file-status.error { color: #ff6b6b; }

/* --- AI result header actions (added) --- */
.ai-result-actions { display: flex; align-items: center; gap: 0.5rem; }
.btn-ai:disabled { opacity: 0.45; cursor: not-allowed; }
#btnSaveAiResult { white-space: nowrap; }

/* --- Organization & scale: bulk actions, multi-select, nested projects (added) --- */
.bulk-bar { flex: 1; display: flex; align-items: center; justify-content: space-between; gap: 1rem; flex-wrap: wrap; background: rgba(138, 43, 226, 0.08); border: 1px solid var(--border-color); border-radius: 10px; padding: 0.6rem 0.9rem; }
.bulk-bar .bulk-count { font-weight: 600; white-space: nowrap; }
.bulk-bar .bulk-actions { display: flex; align-items: center; gap: 0.5rem; flex-wrap: wrap; }
.bulk-input, .bulk-select { padding: 0.4rem 0.6rem; border-radius: 8px; border: 1px solid var(--border-color); background: rgba(255,255,255,0.04); color: inherit; }
.btn-small.danger-text { color: #ff6b6b; }
#btnSelectMode.active { background: var(--accent-primary); color: #fff; }
.prompt-card { position: relative; }
.prompt-card.selected { outline: 2px solid var(--accent-primary); outline-offset: 2px; }
.card-check { position: absolute; top: 0.6rem; left: 0.6rem; z-index: 3; width: 24px; height: 24px; border-radius: 6px; background: rgba(0,0,0,0.55); border: 1px solid rgba(255,255,255,0.4); display: flex; align-items: center; justify-content: center; color: transparent; }
.prompt-card.selected .card-check { background: var(--accent-primary); border-color: var(--accent-primary); color: #fff; }

.list-toolbar { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 1rem; }
.list-toolbar #btnSelectMode { white-space: nowrap; flex-shrink: 0; }

.backup-list { display: flex; flex-direction: column; gap: 0.4rem; max-height: 220px; overflow-y: auto; }
.backup-item { display: flex; align-items: center; justify-content: space-between; gap: 0.5rem; padding: 0.5rem 0.6rem; border: 1px solid var(--border-color); border-radius: 8px; }
.backup-meta { display: flex; flex-direction: column; gap: 0.15rem; min-width: 0; }
.backup-time { font-weight: 600; font-size: 0.85rem; }
.backup-counts { font-size: 0.75rem; color: var(--text-secondary); }
.backup-badge { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.03em; background: rgba(138,43,226,0.15); color: var(--accent-primary); border-radius: 4px; padding: 0.05rem 0.35rem; }
.backup-item-actions { display: flex; gap: 0.3rem; flex-shrink: 0; }

.nav-count { margin-left: auto; font-size: 0.72rem; color: var(--text-secondary); background: rgba(255,255,255,0.06); padding: 0.05rem 0.45rem; border-radius: 10px; font-weight: 600; }
.sort-control { margin-left: auto; display: flex; align-items: center; gap: 0.4rem; flex-shrink: 0; color: var(--text-secondary); }
.sort-control select { min-width: 130px; }
.search-clear { background: none; border: none; color: var(--text-secondary); cursor: pointer; padding: 0.2rem; display: none; align-items: center; font-size: 1.1rem; }
.search-clear:hover { color: var(--text-primary); }
.prompt-counter { font-size: 0.75rem; color: var(--text-secondary); margin-top: 0.35rem; text-align: right; }