/**
 * Enhanced AI Canvas Styles for LifeNotes
 * Advanced styling with animations, accessibility, and mobile responsiveness
 */

/* CSS Custom Properties for theming */
:root {
    /* Color Palette */
    --primary-color: #667eea;
    --primary-light: #8b9eff;
    --primary-dark: #4c63d2;
    --secondary-color: #764ba2;
    --accent-color: #10b981;
    --success-color: #059669;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --info-color: #06b6d4;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* Background Colors */
    --bg-primary: var(--white);
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    
    /* Text Colors */
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-500);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;
    
    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark theme variables */
[data-theme="dark"] {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --bg-tertiary: var(--gray-700);
    --text-primary: var(--gray-100);
    --text-secondary: var(--gray-300);
    --text-tertiary: var(--gray-400);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: #ffffff;
    min-height: 100vh;
    overflow-x: hidden;
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Accessibility improvements */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: var(--white);
    padding: var(--spacing-sm) var(--spacing-md);
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
    transition: var(--transition-fast);
}

.skip-link:focus {
    top: 6px;
}

/* Canvas container */
#noteCanvas {
    position: relative;
    width: 100vw;
    min-height: 100vh;
    padding: var(--spacing-lg);
    cursor: text;
    background: #ffffff;
    user-select: none;
}

/* Canvas brand logo - subtle watermark */
.canvas-brand {
    position: absolute;
    top: var(--spacing-lg);
    left: var(--spacing-lg);
    z-index: 1;
    pointer-events: none;
    user-select: none;
}

.brand-logo {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.875rem;
    font-weight: 300;
    color: #e8e8e8;
    line-height: 1.2;
    letter-spacing: 0.02em;
}

.brand-tagline {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 0.6875rem;
    font-weight: 300;
    color: #e0e0e0;
    line-height: 1.3;
    margin-top: 2px;
    letter-spacing: 0.01em;
}

/* Content blocks */
.content-block {
    position: absolute;
    max-width: 600px;
    min-width: 250px;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal) cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeInUp 0.4s ease-out;
    z-index: 1;
    cursor: grab;
    border: 1px solid #e5e7eb; /* Very light gray border */
    will-change: transform; /* Optimize for transforms */
    touch-action: none; /* Prevent default touch behaviors */
}

.content-block:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    border-color: var(--gray-200);
}

.content-block:active {
    cursor: grabbing;
}

/* Optimized styles for dragging - no transitions, hardware acceleration */
.content-block.dragging {
    transition: none !important;
    cursor: grabbing !important;
    user-select: none !important;
    pointer-events: auto !important;
    z-index: 1000 !important;
    transform: none; /* Remove hover transform during drag */
    will-change: left, top; /* Optimize position changes */
}

.content-block.focused {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.content-block.selected {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

/* Block types */
.content-block.user {
    background: rgba(255, 255, 255, 0.95);
    border-left: 4px solid var(--primary-color);
}

.content-block.system {
    background: rgba(255, 255, 255, 0.85);
    border-left: 4px solid var(--accent-color);
    font-style: italic;
}

.content-block.note {
    background: rgba(255, 255, 255, 0.9);
    border-left: 4px solid var(--warning-color);
}

.content-block.search-result {
    background: rgba(255, 255, 255, 0.88);
    border-left: 4px solid var(--info-color);
}

.content-block.help {
    background: rgba(255, 255, 255, 0.92);
    border-left: 4px solid var(--info-color);
}

.content-block.error {
    background: rgba(255, 255, 255, 0.95);
    border-left: 4px solid var(--error-color);
}

.content-block.pinned {
    border-top: 3px solid var(--warning-color);
}

/* Editable blocks */
.content-block[contenteditable="true"] {
    outline: none;
    border: 1px solid #e5e7eb; /* Very light gray border */
    background: rgba(255, 255, 255, 0.98);
    cursor: text;
    padding: var(--spacing-lg) var(--spacing-xl);
}

.content-block[contenteditable="true"]:focus {
    border: 1px solid #d1d5db; /* Slightly darker gray on focus */
    box-shadow: 0 0 0 2px rgba(229, 231, 235, 0.3);
}

/* When block has no header, adjust padding to start text exactly where clicked */
.content-block[contenteditable="true"]:not(:has(.block-header)) {
    padding: var(--spacing-lg) var(--spacing-xl);
    min-height: 1.5em;
    line-height: 1.5;
}

/* Ensure text starts at the beginning of the block */
.content-block[contenteditable="true"]:not(:has(.block-header))::before {
    content: '';
    display: inline;
}

/* Block header */
.block-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-tertiary);
    gap: var(--spacing-sm);
}

.block-type {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
}

.block-timestamp {
    opacity: 0.7;
    font-size: 0.7rem;
}

.block-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: var(--transition-fast);
}

.content-block:hover .block-actions {
    opacity: 1;
}

.action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    transition: var(--transition-fast);
    opacity: 0.7;
}

.action-btn:hover {
    opacity: 1;
    background: var(--gray-100);
}

/* Block content */
.block-content {
    line-height: 1.6;
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.block-content p {
    margin-bottom: var(--spacing-sm);
}

.block-content p:last-child {
    margin-bottom: 0;
}

/* Note title */
.note-title {
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    line-height: 1.4;
}

/* Tags */
.note-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

.note-tag {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    padding: 2px var(--spacing-sm);
    border-radius: var(--radius-lg);
    font-size: 0.7rem;
    font-weight: 500;
    transition: var(--transition-fast);
}

.note-tag:hover {
    background: rgba(102, 126, 234, 0.2);
    transform: scale(1.05);
}

/* Search results */
.search-results {
    margin-top: var(--spacing-md);
}

.search-result-item {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    background: rgba(139, 92, 246, 0.05);
    border-radius: var(--radius-lg);
    border-left: 3px solid var(--info-color);
    transition: var(--transition-fast);
    cursor: pointer;
}

.search-result-item:hover {
    background: rgba(139, 92, 246, 0.1);
    transform: translateX(2px);
}

.search-result-item:last-child {
    margin-bottom: 0;
}

.search-result-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.search-result-excerpt {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Recent notes */
.recent-notes {
    margin-top: var(--spacing-md);
}

.recent-note-item {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    background: rgba(245, 158, 11, 0.05);
    border-radius: var(--radius-md);
    border-left: 2px solid var(--warning-color);
    opacity: 0.8;
    transition: var(--transition-fast);
    cursor: pointer;
}

.recent-note-item:hover {
    opacity: 1;
    background: rgba(245, 158, 11, 0.1);
}

.recent-note-item:last-child {
    margin-bottom: 0;
}

/* Help suggestions */
.help-suggestions {
    margin-top: var(--spacing-md);
}

.help-suggestion {
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    background: rgba(6, 182, 212, 0.05);
    border-radius: var(--radius-md);
    border-left: 2px solid var(--info-color);
    font-size: 0.875rem;
    color: var(--text-primary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.help-suggestion:hover {
    background: rgba(6, 182, 212, 0.1);
    transform: translateX(2px);
}

.help-suggestion:last-child {
    margin-bottom: 0;
}

/* Keyboard shortcuts section */
.keyboard-shortcuts {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.keyboard-shortcuts h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

.keyboard-shortcuts ul {
    list-style: none;
    padding: 0;
}

.keyboard-shortcuts li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-xs) 0;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

kbd {
    background: var(--gray-200);
    border: 1px solid var(--gray-300);
    border-radius: var(--radius-sm);
    padding: 2px var(--spacing-xs);
    font-size: 0.7rem;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    color: var(--text-primary);
}

/* Loading indicator */
.loading-indicator {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid var(--gray-200);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: var(--spacing-sm);
}

/* AI label */
.ai-label {
    display: inline-flex;
    align-items: center;
    background: rgba(16, 185, 129, 0.1);
    color: var(--accent-color);
    padding: 2px var(--spacing-sm);
    border-radius: var(--radius-lg);
    font-size: 0.7rem;
    font-weight: 600;
    margin-left: var(--spacing-sm);
}

.ai-label::before {
    content: "🤖";
    margin-right: var(--spacing-xs);
}

/* Clickable elements */
.clickable {
    cursor: pointer;
    transition: var(--transition-fast);
}

.clickable:hover {
    background: rgba(102, 126, 234, 0.05);
    transform: translateY(-1px);
}

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

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

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes slideIn {
    from {
        transform: translateX(-100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes bounce {
    0%, 20%, 53%, 80%, 100% {
        transform: translate3d(0, 0, 0);
    }
    40%, 43% {
        transform: translate3d(0, -8px, 0);
    }
    70% {
        transform: translate3d(0, -4px, 0);
    }
    90% {
        transform: translate3d(0, -2px, 0);
    }
}

/* Empty state */
.empty-state {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: 1.125rem;
    pointer-events: none;
    user-select: none;
    animation: fadeIn 1s ease-out;
}

.empty-state h2 {
    margin-bottom: var(--spacing-md);
    font-weight: 300;
    font-size: 2rem;
}

.empty-state p {
    font-size: 1rem;
    opacity: 0.7;
    line-height: 1.5;
}

/* Notifications */
.notification {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-lg);
    color: var(--white);
    font-weight: 500;
    z-index: var(--z-tooltip);
    transform: translateX(100%);
    transition: var(--transition-normal);
    max-width: 300px;
    box-shadow: var(--shadow-lg);
}

.notification.show {
    transform: translateX(0);
}

.notification-info {
    background: var(--info-color);
}

.notification-success {
    background: var(--success-color);
}

.notification-warning {
    background: var(--warning-color);
}

.notification-error {
    background: var(--error-color);
}

/* Context menu */
.context-menu {
    position: fixed;
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--gray-200);
    z-index: var(--z-dropdown);
    min-width: 150px;
    animation: fadeIn var(--transition-fast);
}

.menu-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--text-primary);
}

.menu-item:hover {
    background: var(--gray-50);
}

.menu-item:first-child {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.menu-item:last-child {
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    #noteCanvas {
        padding: var(--spacing-sm);
    }
    
    .content-block {
        max-width: calc(100vw - 20px);
        min-width: 150px;
        padding: var(--spacing-md);
        font-size: 0.9rem;
    }
    
    .block-header {
        font-size: 0.7rem;
    }
    
    .note-title {
        font-size: 0.9rem;
    }
    
    .empty-state h2 {
        font-size: 1.5rem;
    }
    
    .empty-state p {
        font-size: 0.9rem;
    }
    
    .notification {
        top: var(--spacing-sm);
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
    
    .context-menu {
        min-width: 120px;
    }
    
    .menu-item {
        padding: var(--spacing-sm);
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .content-block {
        max-width: calc(100vw - 10px);
        min-width: 120px;
        padding: var(--spacing-sm);
    }
    
    .block-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    .note-tags {
        gap: var(--spacing-xs);
    }
    
    .note-tag {
        font-size: 0.6rem;
        padding: 1px var(--spacing-xs);
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .content-block {
        border: 2px solid var(--gray-800);
    }
    
    .content-block:hover {
        border-color: var(--primary-color);
    }
    
    .note-tag {
        border: 1px solid var(--primary-color);
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .content-block {
        animation: none;
    }
    
    .loading-indicator {
        animation: none;
    }
}

/* Print styles */
@media print {
    .content-block {
        position: static;
        margin-bottom: var(--spacing-lg);
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    .block-actions,
    .context-menu,
    .notification {
        display: none;
    }
}

/* Focus styles for accessibility */
.content-block:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.action-btn:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Selection styles */
::selection {
    background: rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
}

::-moz-selection {
    background: rgba(102, 126, 234, 0.2);
    color: var(--text-primary);
}

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

::-webkit-scrollbar-track {
    background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
} 
.block-content h5 { font-size: 14px; }
.block-content h6 { font-size: 12px; }

/* Auto List Styles */
.auto-list {
    margin: var(--spacing-sm) 0;
    padding: 0;
    list-style: none;
}

.list-item {
    position: relative;
    padding: var(--spacing-xs) 0;
    margin: 0;
    line-height: 1.5;
    min-height: 1.5em;
    outline: none;
    transition: background-color var(--transition-fast);
}

.list-item:focus {
    background-color: rgba(102, 126, 234, 0.05);
    border-radius: var(--radius-sm);
}

.list-item:focus::before {
    content: '';
    position: absolute;
    left: -2px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--primary-color);
    border-radius: var(--radius-sm);
}

.list-item:empty::after {
    content: 'Type here...';
    color: var(--text-tertiary);
    font-style: italic;
    pointer-events: none;
}

/* Nested lists */
.list-item .auto-list {
    margin-left: var(--spacing-lg);
    margin-top: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.list-item .list-item {
    padding-left: var(--spacing-sm);
}

/* List item indentation */
.list-item.indented {
    margin-left: var(--spacing-lg);
}

.list-item.indented::before {
    content: '◦ ';
    color: var(--text-tertiary);
    margin-right: var(--spacing-xs);
}

/* List item states */
.list-item.completed {
    text-decoration: line-through;
    color: var(--text-tertiary);
}

.list-item.completed::before {
    content: '✓ ';
    color: var(--success-color);
    margin-right: var(--spacing-xs);
}

/* List item animations */
.list-item {
    animation: listItemFadeIn var(--transition-normal);
}

@keyframes listItemFadeIn {
    from {
        opacity: 0;
        transform: translateY(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* List item hover effects */
.list-item:hover {
    background-color: rgba(102, 126, 234, 0.02);
    border-radius: var(--radius-sm);
}

/* List item selection */
.list-item.selected {
    background-color: rgba(102, 126, 234, 0.1);
    border-radius: var(--radius-sm);
}

/* List item drag and drop */
.list-item.dragging {
    opacity: 0.5;
    transform: rotate(2deg);
}

.list-item.drag-over {
    border-top: 2px solid var(--primary-color);
}

/* List item keyboard navigation */
.list-item:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* List item placeholder */
.list-item[data-placeholder]:empty::before {
    content: attr(data-placeholder);
    color: var(--text-tertiary);
    font-style: italic;
    pointer-events: none;
}

/* List item bullet customization */
.list-item::before {
    content: '• ';
    color: var(--primary-color);
    margin-right: var(--spacing-xs);
    font-weight: bold;
}

/* Different bullet styles for different list types */
.list-item[data-list-type="dash"]::before {
    content: '– ';
}

.list-item[data-list-type="arrow"]::before {
    content: '→ ';
}

.list-item[data-list-type="check"]::before {
    content: '☐ ';
}

.list-item[data-list-type="check"].completed::before {
    content: '☑ ';
}

/* List item spacing and typography */
.list-item {
    font-size: 14px;
    color: var(--text-primary);
}

.list-item strong {
    font-weight: 600;
    color: var(--text-primary);
}

.list-item em {
    font-style: italic;
    color: var(--text-secondary);
}

.list-item code {
    background-color: var(--bg-tertiary);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 12px;
    color: var(--text-primary);
}

/* List item links */
.list-item a {
    color: var(--primary-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition-fast);
}

.list-item a:hover {
    border-bottom-color: var(--primary-color);
}

/* List item responsive design */
@media (max-width: 768px) {
    .list-item {
        font-size: 16px; /* Prevent zoom on iOS */
        padding: var(--spacing-sm) 0;
    }
    
    .list-item .auto-list {
        margin-left: var(--spacing-md);
    }
    
    .list-item.indented {
        margin-left: var(--spacing-md);
    }
}

/* List item dark theme support */
[data-theme="dark"] .list-item {
    color: var(--text-primary);
}

[data-theme="dark"] .list-item:focus {
    background-color: rgba(102, 126, 234, 0.1);
}

[data-theme="dark"] .list-item:hover {
    background-color: rgba(102, 126, 234, 0.05);
}

[data-theme="dark"] .list-item code {
    background-color: var(--gray-700);
    color: var(--text-primary);
}

/* List item accessibility */
@media (prefers-reduced-motion: reduce) {
    .list-item {
        animation: none;
        transition: none;
    }
}

/* List item print styles */
@media print {
    .list-item {
        break-inside: avoid;
        page-break-inside: avoid;
    }
    
    .list-item:focus,
    .list-item:hover {
        background-color: transparent;
    }
}

/* Link Preview Styles */
.link-preview {
    margin: var(--spacing-md) 0;
    border: 1px solid var(--gray-200);
    border-radius: var(--border-radius);
    background: var(--white);
    overflow: hidden;
    transition: all var(--transition-fast);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.link-preview:hover {
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
    transform: translateY(-1px);
}

.link-preview-content {
    display: flex;
    align-items: flex-start;
    padding: var(--spacing-md);
    gap: var(--spacing-md);
}

.link-favicon {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.link-info {
    flex: 1;
    min-width: 0;
}

.link-title {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: var(--spacing-xs);
    font-size: 14px;
    line-height: 1.4;
}

.link-description {
    color: var(--gray-600);
    font-size: 13px;
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.link-url {
    color: var(--blue-600);
    font-size: 12px;
    font-family: var(--font-mono);
    word-break: break-all;
}

.link-image {
    width: 80px;
    height: 60px;
    object-fit: cover;
    border-radius: var(--border-radius-sm);
    flex-shrink: 0;
}

.link-actions {
    display: flex;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--gray-50);
    border-top: 1px solid var(--gray-200);
}

.link-action-btn {
    background: none;
    border: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    color: var(--gray-600);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 12px;
}

.link-action-btn:hover {
    background: var(--gray-200);
    color: var(--gray-800);
}

.link-action-btn i {
    font-size: 12px;
}

/* Dark mode link previews */
@media (prefers-color-scheme: dark) {
    .link-preview {
        background: var(--gray-800);
        border-color: var(--gray-700);
    }
    
    .link-title {
        color: var(--gray-100);
    }
    
    .link-description {
        color: var(--gray-400);
    }
    
    .link-url {
        color: var(--blue-400);
    }
    
    .link-actions {
        background: var(--gray-900);
        border-color: var(--gray-700);
    }
    
    .link-action-btn:hover {
        background: var(--gray-700);
        color: var(--gray-200);
    }
}

/* Link preview responsive design */
@media (max-width: 768px) {
    .link-preview-content {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .link-image {
        width: 100%;
        height: 120px;
        align-self: center;
    }
    
    .link-actions {
        justify-content: center;
    }
}

/* Link preview print styles */
@media print {
    .link-preview {
        display: none !important;
    }
} /* Canvas Toolbar Styles */
.canvas-toolbar {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    flex-direction: row;
    gap: 8px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border: 1px solid #e5e7eb;
}

.toolbar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: transparent;
    color: var(--gray-600);
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.toolbar-icon:hover {
    background: var(--gray-100);
    color: var(--gray-900);
    transform: translateY(-1px);
}

.toolbar-icon:active {
    transform: translateY(0);
}

.toolbar-icon i {
    font-size: 18px;
}

.toolbar-icon.home-icon:hover {
    background: var(--primary-color);
    color: white;
}

.toolbar-icon.clear-icon:hover {
    background: var(--error-color);
    color: white;
}

.toolbar-icon.history-icon:hover {
    background: var(--info-color);
    color: white;
}

.toolbar-icon.save-icon:hover {
    background: var(--success-color);
    color: white;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
    animation: fadeIn 0.2s ease-out;
}

.modal.show,
.modal[style*="block"] {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 90%;
    max-height: 90vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--gray-200);
}

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

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--gray-100);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-xl);
    overflow-y: auto;
    flex: 1;
}

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

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

/* History Modal Styles */
.history-modal .modal-content {
    max-width: 600px;
    max-height: 70vh;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    margin-bottom: 8px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--gray-200);
    cursor: pointer;
    transition: all 0.2s ease;
}

.history-item:hover {
    background: var(--bg-primary);
    border-color: var(--primary-color);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.history-item:last-child {
    margin-bottom: 0;
}

.history-date {
    font-weight: 600;
    color: var(--text-primary);
}

.history-notes {
    color: var(--text-secondary);
    font-size: 14px;
}

/* Shortcuts Modal Styles */
.shortcuts-modal .modal-content {
    max-width: 600px;
    max-height: 80vh;
}

.shortcuts-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.shortcut-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--gray-200);
    transition: var(--transition-fast);
}

.shortcut-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--gray-300);
}

.shortcut-key {
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    background: var(--gray-100);
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--gray-300);
    min-width: 120px;
    text-align: center;
}

.shortcut-description {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    flex: 1;
    margin-left: var(--spacing-lg);
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .canvas-toolbar {
        top: 10px;
        right: 10px;
        padding: 6px;
        gap: 6px;
    }
    
    .toolbar-icon {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .toolbar-icon i {
        font-size: 16px;
    }
}

/* ============================================================================
   Link Notes Styles
   ============================================================================ */

/* Link note container */
.content-block.link-note {
    min-width: 300px;
    max-width: 500px;
}

/* Link preview card */
.link-preview-card {
    border: 1px solid var(--gray-200);
    border-radius: 8px;
    background: var(--white);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
    transition: box-shadow 0.2s ease;
}

.link-preview-card:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Link preview image */
.link-preview-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background: var(--gray-100);
}

.link-preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Link preview content */
.link-preview-content {
    padding: var(--spacing-md);
}

.link-preview-site {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.link-preview-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

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

.link-preview-title a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.link-preview-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-top: var(--spacing-sm);
}

/* Link preview loading/error states */
.link-preview-loading,
.link-preview-error,
.link-preview-simple {
    padding: var(--spacing-md);
}

.link-preview-domain {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    margin-bottom: var(--spacing-xs);
}

.link-preview-url {
    font-size: 0.875rem;
    color: var(--text-secondary);
    word-break: break-all;
}

.link-preview-status {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-style: italic;
    margin-top: var(--spacing-xs);
}

/* User text section for link notes */
.link-note-user-text {
    min-height: 60px;
    padding: var(--spacing-sm);
    border-top: 1px solid var(--gray-200);
    background: var(--bg-secondary);
    border-radius: 0 0 8px 8px;
    font-size: 0.875rem;
    line-height: 1.5;
    color: var(--text-primary);
    outline: none;
}

.link-note-user-text:empty:before {
    content: attr(data-placeholder);
    color: var(--text-tertiary);
    font-style: italic;
}

.link-note-user-text:focus {
    background: var(--white);
    border-color: var(--primary-color);
}

/* Link note in list view (for notes list page) */
.note-item.link-note {
    display: flex;
    flex-direction: column;
}

.note-item.link-note .note-preview {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.note-item.link-note .note-preview-thumbnail {
    width: 120px;
    height: 80px;
    border-radius: 4px;
    object-fit: cover;
    flex-shrink: 0;
}

.note-item.link-note .note-preview-content {
    flex: 1;
    min-width: 0;
}

.note-item.link-note .note-preview-title {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.note-item.link-note .note-preview-site {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-xs);
}

.note-item.link-note .note-preview-snippet {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}