/* Header */

.header {
    background: var(--bg-main);
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
    padding-left: 4px;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 24px;
    height: 24px;
    color: var(--primary);
}

.header-right {
    display: flex;
    gap: 8px;
    align-items: center;
}

/* Local Mode Badge */
.local-mode-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    color: white;
    background: linear-gradient(135deg, #F37021, #d85f17);
    cursor: default;
    white-space: nowrap;
    user-select: none;
}

.local-mode-badge svg {
    flex-shrink: 0;
}

.local-mode-badge.hidden {
    display: none;
}

/* Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 14px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn svg {
    width: 16px;
    height: 16px;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

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

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

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

.btn-outline:hover {
    background: var(--light);
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: var(--primary);
}

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

.btn-icon svg {
    width: 18px;
    height: 18px;
}

.header-left .btn-icon {
    width: 32px;
    height: 32px;
}

.header-left .btn-icon svg {
    width: 16px;
    height: 16px;
}

.btn-icon .sun-icon {
    display: none;
}

.btn-icon .moon-icon {
    display: block;
}

[data-theme="dark"] .btn-icon .sun-icon {
    display: block;
}

[data-theme="dark"] .btn-icon .moon-icon {
    display: none;
}

.btn-sm {
    padding: 4px 8px;
    font-size: 0.8rem;
}

.btn-sm svg {
    width: 14px;
    height: 14px;
}

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

/* Main Container */

.main-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.content {
    flex: 1;
    display: flex;
    overflow: hidden;
    background: var(--bg-main);
}

/* Sidebar */

.sidebar {
    width: 280px;
    background: var(--bg-main);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: width var(--transition);
}

.sidebar.collapsed {
    width: 0;
    border-right: none;
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-main);
}

.search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 8px;
}

.search-box svg {
    width: 16px;
    height: 16px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.search-box input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 0.875rem;
    color: var(--text-primary);
    outline: none;
}

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

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

.notes-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.note-item {
    padding: 12px;
    padding-right: 40px;
    margin-bottom: 4px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
    border: 1px solid transparent;
    position: relative;
    background: transparent;
}

.note-item:hover {
    background: var(--light);
    border-color: var(--border);
}

.note-item.active {
    background: transparent;
    border-color: transparent;
}

.note-item.active .note-title {
    color: var(--primary);
}

[data-theme="dark"] .note-item.active {
    background: transparent;
}

[data-theme="dark"] .note-item.active .note-title,
[data-theme="dark"] .note-item.active .note-preview {
    color: var(--primary);
}

.note-item .note-title {
    font-weight: 600;
    font-size: 0.875rem;
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.note-item .note-preview {
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.4;
}

.note-item .delete-note {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    background: transparent;
    color: var(--text-muted);
    border: none;
    border-radius: 50%;
    width: 22px;
    height: 22px;
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
}

.note-item:hover .delete-note {
    opacity: 1;
}

.note-item .delete-note:hover {
    background: var(--primary-light);
    color: var(--primary);
    transform: translateY(-50%) scale(1.1);
}

[data-theme="dark"] .note-item .delete-note {
    color: var(--text-muted);
}

[data-theme="dark"] .note-item .delete-note:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Note View (Unified Editor & Preview) */

.note-view {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.note-view-row {
    flex: 1;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    min-height: 0;
}

.editor-section, .preview-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}



.section-header {
    padding: 10px 16px;
    background: var(--light);
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.8rem;
    gap: 16px;
}

.editor-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.char-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: normal;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
}

.toolbar-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: var(--text-secondary);
}

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

.toolbar-btn svg {
    width: 14px;
    height: 14px;
}

.toolbar-divider {
    width: 1px;
    height: 20px;
    background: var(--border);
    margin: 0 6px;
}

.preview-actions {
    display: flex;
    gap: 4px;
    flex-shrink: 0;
}

.editor {
    flex: 1;
    padding: 20px;
    border: none;
    resize: none;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.7;
    background: var(--editor-bg);
    color: var(--editor-text);
    outline: none;
    transition: background var(--transition), color var(--transition);
}

.editor::placeholder {
    color: var(--text-muted);
}

.editor:focus {
    background: var(--editor-bg);
}

.editor-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 80px;
}

.editor-body {
    flex: 1;
    display: flex;
    overflow: hidden;
    min-height: 0;
}

/* Note Metadata Bar (description + topics/keywords) */

.note-meta {
    flex-shrink: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-main);
    border-bottom: 1px solid var(--border);
}

.note-meta-field {
    flex: 1 1 240px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 10px;
    background: var(--light);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.note-meta-field:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.note-meta-field svg {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.note-meta-field input {
    flex: 1;
    min-width: 0;
    border: none;
    background: transparent;
    font-size: 0.8rem;
    color: var(--text-primary);
    outline: none;
}

.note-meta-field input::placeholder {
    color: var(--text-muted);
}

[data-theme="dark"] .note-meta-field {
    background: var(--bg-tertiary);
}

.editor-gutter {
    flex-shrink: 0;
    padding: 20px 10px 20px 0;
    text-align: right;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-muted);
    background: var(--editor-bg);
    border-right: 1px solid var(--border);
    user-select: none;
    overflow: hidden;
    min-width: 42px;
    transition: background var(--transition), color var(--transition);
}

.editor-gutter div {
    padding: 0 8px 0 4px;
}

.editor {
    border-left: none;
}

/* Draggable Resize Handle */

.resize-handle {
    width: 12px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: col-resize;
    background: var(--bg-main);
    position: relative;
    user-select: none;
    z-index: 10;
    transition: background 0.15s ease;
}

.resize-handle:hover,
.resize-handle.active {
    background: var(--primary-light);
}

.resize-handle-line {
    width: 1px;
    height: 100%;
    background: var(--border);
    transition: background 0.15s ease;
}

.resize-handle:hover .resize-handle-line,
.resize-handle.active .resize-handle-line {
    background: var(--primary);
    width: 2px;
}

.resize-handle-dot {
    position: absolute;
    width: 6px;
    height: 40px;
    border-radius: 3px;
    background: var(--border);
    transition: background 0.15s ease, transform 0.15s ease;
    opacity: 0;
}

.resize-handle:hover .resize-handle-dot,
.resize-handle.active .resize-handle-dot {
    opacity: 1;
    background: var(--primary);
    transform: scale(1.15);
}

/* Preview */

.preview {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background: var(--preview-bg);
    color: var(--text-primary);
    line-height: 1.7;
    transition: background var(--transition), color var(--transition);
    min-height: 0;
}

.preview:empty::before {
    content: 'Preview will appear here as you type...';
    color: var(--text-muted);
    font-style: italic;
    font-size: 0.9rem;
}

.preview.raw-mode {
    font-family: var(--font-mono);
    white-space: pre-wrap;
    word-break: break-word;
}

.preview.raw-mode pre {
    margin: 0;
    padding: 0;
    background: transparent;
}

.preview h1, .preview h2, .preview h3, .preview h4, .preview h5, .preview h6 {
    margin: 1.2em 0 0.5em;
    color: var(--text-primary);
    font-weight: 600;
    line-height: 1.3;
}

.preview h1 { font-size: 1.75rem; }
.preview h2 { font-size: 1.5rem; }
.preview h3 { font-size: 1.25rem; }
.preview h4 { font-size: 1.1rem; }

.preview p {
    margin-bottom: 1em;
}

.preview a {
    color: var(--primary);
    text-decoration: none;
}

.preview a:hover {
    text-decoration: underline;
}

.preview code {
    background: var(--light);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9em;
    color: var(--primary);
}

.preview pre {
    background: var(--light);
    padding: 16px;
    border-radius: var(--radius);
    overflow-x: auto;
    margin: 1em 0;
}

.preview pre code {
    background: none;
    padding: 0;
    color: var(--text-primary);
}

.preview ul, .preview ol {
    padding-left: 1.5em;
    margin-bottom: 1em;
}

.preview li {
    margin-bottom: 0.5em;
}

.preview blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1em;
    margin: 1em 0;
    color: var(--text-secondary);
    font-style: italic;
}

.preview hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 2em 0;
}

.preview table {
    border-collapse: collapse;
    width: 100%;
    margin: 1em 0;
}

.preview th, .preview td {
    border: 1px solid var(--border);
    padding: 10px;
    text-align: left;
}

.preview th {
    background: var(--light);
    font-weight: 600;
}

.preview img {
    max-width: 100%;
    border-radius: var(--radius);
}

/* Footer */

.footer {
    background: var(--bg-main);
    padding: 8px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.footer-right {
    display: flex;
    gap: 16px;
    align-items: center;
}

.status {
    display: flex;
    align-items: center;
    gap: 8px;
}

.status.success { color: var(--success); }
.status.error { color: var(--danger); }
.status.info { color: var(--info); }

.sync-status {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Modal */

.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
}

.modal {
    background: var(--bg-main);
    border-radius: var(--radius);
    width: 90%;
    max-width: 480px;
    max-height: 85vh;
    box-shadow: var(--shadow-lg);
    animation: slideIn 0.3s ease;
    display: flex;
    flex-direction: column;
}

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

.modal-header h2 {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.close-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--primary);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

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

.close-btn svg {
    width: 18px;
    height: 18px;
}

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

/* Settings */

.settings-section {
    margin-bottom: 24px;
}

.settings-section:last-child {
    margin-bottom: 0;
}

.settings-section h3 {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Sync Provider Tabs */

.sync-tabs {
    display: inline-flex;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
}

.sync-tab {
    padding: 4px 14px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border: none;
    background: var(--bg-main);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition);
}

.sync-tab:not(:last-child) {
    border-right: 1px solid var(--border);
}

.sync-tab:hover {
    color: var(--text-primary);
    background: var(--light);
}

.sync-tab.active {
    background: var(--primary);
    color: white;
}

.sync-tab.active:hover {
    background: var(--primary-hover);
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.setting-label {
    font-weight: 500;
    color: var(--text-primary);
}

.setting-desc {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.toggle-btn {
    width: 44px;
    height: 24px;
    border: none;
    border-radius: 12px;
    background: var(--border);
    cursor: pointer;
    position: relative;
    transition: background var(--transition);
}

.toggle-btn.active {
    background: var(--primary);
}

.toggle-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background: white;
    border-radius: 50%;
    transition: transform var(--transition);
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

.toggle-btn.active .toggle-slider {
    transform: translateX(20px);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"] {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 0.9rem;
    background: var(--bg-main);
    color: var(--text-primary);
    transition: border-color var(--transition);
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="number"]:focus {
    outline: none;
    border-color: var(--primary);
}

/* Range slider */
.form-group input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--border);
    outline: none;
    cursor: pointer;
    padding: 0;
    border: none;
    transition: background var(--transition);
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--bg-main);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    transition: transform var(--transition), box-shadow var(--transition);
}

.form-group input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.15);
}

.form-group input[type="range"]::-moz-range-track {
    height: 6px;
    border-radius: 3px;
    background: var(--border);
    border: none;
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    border: 3px solid var(--bg-main);
    box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    transition: transform var(--transition), box-shadow var(--transition);
}

.form-group input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.15);
}

.form-group input[type="range"]:focus {
    outline: none;
}

[data-theme="dark"] .form-group input[type="range"] {
    background: var(--border-light);
}

[data-theme="dark"] .form-group input[type="range"]::-webkit-slider-thumb {
    border-color: var(--bg-main);
}

[data-theme="dark"] .form-group input[type="range"]::-moz-range-thumb {
    border-color: var(--bg-main);
}

[data-theme="dark"] .form-group input:focus {
    border-color: var(--primary);
}

[data-theme="dark"] .btn-primary:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

[data-theme="dark"] .toolbar-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.form-actions {
    display: flex;
    gap: 8px;
    margin-top: 16px;
}

.message {
    padding: 10px 14px;
    border-radius: var(--radius);
    font-size: 0.85rem;
    display: none;
}

.message.success {
    background: #d4edda;
    color: #155724;
    display: block;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    display: block;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    display: block;
}

[data-theme="dark"] .message.success {
    background: rgba(40, 167, 69, 0.2);
    color: #75e691;
}

[data-theme="dark"] .message.error {
    background: rgba(220, 53, 69, 0.2);
    color: #ff6b7a;
}

[data-theme="dark"] .message.info {
    background: rgba(23, 162, 184, 0.2);
    color: #6dd5ed;
}

.sql-setup-guide {
    margin: 8px 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 6px 10px;
    font-size: 0.82rem;
}

.sql-setup-guide summary {
    cursor: pointer;
    color: var(--text-muted);
    user-select: none;
    padding: 2px 0;
}

.sql-setup-guide summary:hover {
    color: var(--text-primary);
}

.sql-setup-guide pre {
    color: var(--text-primary);
    line-height: 1.5;
    margin: 0;
}

.about-text {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}