/* ===== CSS Variables ===== */
:root {
    /* Colors - Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f7f7f5;
    --bg-tertiary: #f1f1ef;
    --bg-hover: rgba(55, 53, 47, 0.06);
    --bg-selected: rgba(35, 131, 226, 0.14);
    --bg-drag-over: rgba(35, 131, 226, 0.08);
    
    --text-primary: #37352f;
    --text-secondary: #6b6b6b;
    --text-tertiary: #9ca3af;
    --text-muted: rgba(55, 53, 47, 0.4);
    
    --border-color: #e3e2e0;
    --border-hover: #d3d1cb;
    
    --accent-color: #2383e2;
    --accent-hover: #0077d4;
    
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 0px;
    --content-max-width: 900px;
    --content-padding: 96px;
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Inter", "Helvetica Neue", Arial, sans-serif;
    --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: rgba(15, 15, 15, 0.05) 0px 0px 0px 1px, rgba(15, 15, 15, 0.1) 0px 3px 6px, rgba(15, 15, 15, 0.2) 0px 9px 24px;
    
    --radius-sm: 3px;
    --radius-md: 6px;
    --radius-lg: 8px;
    
    /* Block Colors */
    --color-gray: #f1f1ef;
    --color-brown: #f4eeee;
    --color-orange: #faeddc;
    --color-yellow: #fbf3db;
    --color-green: #edf3ec;
    --color-blue: #e7f3f8;
    --color-purple: #f6f3f9;
    --color-pink: #faf1f5;
    --color-red: #fdebec;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #191919;
    --bg-secondary: #202020;
    --bg-tertiary: #262626;
    --bg-hover: rgba(255, 255, 255, 0.055);
    --bg-selected: rgba(35, 131, 226, 0.28);
    --bg-drag-over: rgba(35, 131, 226, 0.15);
    
    --text-primary: rgba(255, 255, 255, 0.9);
    --text-secondary: rgba(255, 255, 255, 0.6);
    --text-tertiary: rgba(255, 255, 255, 0.4);
    --text-muted: rgba(255, 255, 255, 0.25);
    
    --border-color: #2f2f2f;
    --border-hover: #3f3f3f;
    
    --color-gray: #252525;
    --color-brown: #2a1f1f;
    --color-orange: #2d241b;
    --color-yellow: #2e2a1b;
    --color-green: #1f2a1f;
    --color-blue: #1f2a33;
    --color-purple: #2a1f2a;
    --color-pink: #2d1f28;
    --color-red: #2d1f1f;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    overflow: hidden;
}

#app {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* ===== Sidebar ===== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.2s ease, transform 0.2s ease;
    overflow: hidden;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-width);
    border-right: none;
}

.sidebar-header {
    padding: 12px 14px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid transparent;
}

.workspace-info {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.workspace-avatar {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: 600;
    color: white;
    flex-shrink: 0;
}

.workspace-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.icon-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
}

.sidebar:hover .icon-btn,
.icon-btn:focus {
    opacity: 1;
}

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

.sidebar-actions {
    padding: 8px 14px;
}

.new-page-btn {
    width: 100%;
    padding: 6px 8px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: background 0.15s;
}

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

.sidebar-section {
    flex: 1;
    overflow-y: auto;
    padding: 8px 4px;
}

.section-title {
    padding: 6px 14px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Page Tree */
.page-tree {
    padding: 4px 0;
}

.page-tree-item {
    display: flex;
    align-items: center;
    padding: 5px 14px;
    margin: 1px 4px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    color: var(--text-secondary);
    transition: background 0.15s;
    user-select: none;
}

.page-tree-item:hover {
    background: var(--bg-hover);
}

.page-tree-item.active {
    background: var(--bg-selected);
    color: var(--text-primary);
    font-weight: 500;
}

.page-tree-item .page-icon {
    margin-right: 8px;
    font-size: 16px;
    width: 20px;
    text-align: center;
}

.page-tree-item .page-title-text {
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.page-tree-item .expand-btn {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 2px;
    opacity: 0.5;
    transition: transform 0.15s, opacity 0.15s;
}

.page-tree-item .expand-btn:hover {
    opacity: 1;
}

.page-tree-item .expand-btn.expanded {
    transform: rotate(90deg);
}

.page-tree-item .expand-btn.hidden {
    visibility: hidden;
}

.page-tree-children {
    margin-left: 12px;
    border-left: 1px solid var(--border-color);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 4px;
    border-top: 1px solid var(--border-color);
}

.footer-btn {
    width: 100%;
    padding: 6px 10px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background 0.15s;
}

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

[data-theme="dark"] .sun-icon {
    display: none !important;
}

[data-theme="light"] .moon-icon,
:root:not([data-theme]) .moon-icon {
    display: none !important;
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--bg-primary);
    position: relative;
    scroll-behavior: smooth;
}

.main-content::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

.main-content::-webkit-scrollbar-track {
    background: transparent;
}

.main-content::-webkit-scrollbar-thumb {
    background: transparent;
    border-radius: 5px;
}

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

/* Cover Area */
.cover-area {
    position: relative;
    height: 30vh;
    min-height: 150px;
    max-height: 300px;
    width: 100%;
}

.cover-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

.cover-change-btn,
.cover-remove-btn {
    position: absolute;
    bottom: 16px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    padding: 6px 12px;
    font-size: 13px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
}

.cover-area:hover .cover-change-btn,
.cover-area:hover .cover-remove-btn {
    opacity: 1;
}

.cover-change-btn {
    right: 52px;
}

.cover-change-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

.cover-remove-btn {
    right: 16px;
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cover-remove-btn:hover {
    background: rgba(255, 0, 0, 0.6);
}

/* Page Header - FIXED: Added proper padding */
.page-header {
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
    padding: 32px var(--content-padding) 0;
    position: relative;
}

/* When cover exists, pull header up */
.cover-area + .page-header {
    margin-top: -50px;
    padding-top: 0;
}

/* When no cover, ensure proper spacing at top */
.page-header:first-child {
    padding-top: 48px;
}

.page-icon-wrapper {
    margin-bottom: 16px;
    position: relative;
}

.page-icon-btn {
    width: 78px;
    height: 78px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    transition: background 0.15s, border-color 0.15s;
    position: relative;
}

.page-icon-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.add-icon-hint {
    display: none;
    font-size: 14px;
    color: var(--text-secondary);
}

.page-icon-btn:not(:has(.page-icon:not(:empty))) .add-icon-hint {
    display: block;
}

.page-icon-btn:not(:has(.page-icon:not(:empty))) {
    font-size: 14px;
    color: var(--text-secondary);
}

.page-title-wrapper {
    margin-bottom: 8px;
}

.page-title {
    width: 100%;
    font-size: 40px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    border: none;
    outline: none;
    background: transparent;
    padding: 0;
    font-family: inherit;
}

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

.add-cover-btn {
    position: absolute;
    top: 16px;
    right: 24px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 6px 12px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
}

.page-header:hover .add-cover-btn {
    opacity: 1;
}

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

/* Properties Area */
.properties-area {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 16px;
    padding: 4px 0;
}

.property-row {
    display: flex;
    align-items: center;
    min-height: 28px;
}

.property-key {
    width: 120px;
    font-size: 14px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.property-value {
    flex: 1;
    font-size: 14px;
    color: var(--text-primary);
    background: transparent;
    border: none;
    outline: none;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

.property-value:hover,
.property-value:focus {
    background: var(--bg-hover);
}

/* ===== Page Model Selector ===== */
/* Connection Status */
.connection-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    padding: 6px 12px;
    background: var(--bg-hover);
    border-radius: 6px;
    font-size: 13px;
    width: fit-content;
}

.connection-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #888;
    transition: background 0.3s ease;
}

.connection-indicator.connected {
    background: #3fb950;
    box-shadow: 0 0 0 2px rgba(63, 185, 80, 0.3);
}

.connection-indicator.disconnected {
    background: #f85149;
    box-shadow: 0 0 0 2px rgba(248, 81, 73, 0.3);
}

.connection-indicator.checking {
    background: #d29922;
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

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

.page-model-selector {
    margin-bottom: 16px;
    padding: 8px 0;
}

.model-selector-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.model-selector-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.model-selector-dropdown {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s, background 0.15s;
}

.model-selector-dropdown:hover,
.model-selector-dropdown:focus {
    border-color: var(--border-hover);
    background: var(--bg-hover);
}

.model-selector-hint {
    font-size: 12px;
    color: var(--text-muted);
    width: 100%;
    margin-top: 4px;
}

/* ===== Editor ===== */
.editor {
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
    padding: 8px var(--content-padding) 200px;
    flex: 1;
    min-height: 0;
}

/* Block Base Styles */
.block {
    position: relative;
    display: flex;
    align-items: flex-start;
    min-height: 32px;
    margin: 1px 0;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

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

.block.selected {
    background: var(--bg-selected);
}

.block.dragging {
    opacity: 0.5;
}

.block.drag-over {
    background: var(--bg-drag-over);
    border: 2px dashed var(--accent-color);
}

/* Block Handle (⋮⋮) - IMPROVED: Better visibility */
.block-handle {
    position: absolute;
    left: -24px;
    top: 2px;
    width: 18px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
    opacity: 0;
    color: var(--text-muted);
    transition: opacity 0.15s, color 0.15s, background 0.15s;
    user-select: none;
    border-radius: var(--radius-sm);
}

.block:hover .block-handle,
.block.selected .block-handle {
    opacity: 0.6;
}

.block-handle:hover {
    opacity: 1 !important;
    color: var(--text-secondary);
    background: var(--bg-hover);
}

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

.block-handle::before {
    content: "⋮⋮";
    font-size: 12px;
    letter-spacing: -1px;
}

/* Block Content */
.block-content {
    flex: 1;
    min-width: 0;
    padding: 3px 2px;
}

.block-input {
    width: 100%;
    min-height: 26px;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 16px;
    line-height: 1.5;
    color: var(--text-primary);
    resize: none;
    padding: 0;
    overflow: hidden;
}

/* IMPROVED: Better placeholder behavior */
.block-input:empty::before,
.block-input[data-placeholder]:empty::before {
    content: attr(data-placeholder);
    color: var(--text-muted);
    pointer-events: none;
}

.block-input:focus:empty::before {
    opacity: 0.6;
}

/* Block Types */
/* Heading 1 */
.block[data-type="heading_1"] .block-input {
    font-size: 32px;
    font-weight: 700;
    line-height: 1.2;
    margin-top: 24px;
    margin-bottom: 8px;
}

/* Heading 2 */
.block[data-type="heading_2"] .block-input {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.3;
    margin-top: 20px;
    margin-bottom: 6px;
}

/* Heading 3 */
.block[data-type="heading_3"] .block-input {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.4;
    margin-top: 16px;
    margin-bottom: 4px;
}

/* Lists */
.block[data-type="bulleted_list"] .block-content,
.block[data-type="numbered_list"] .block-content,
.block[data-type="todo"] .block-content {
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.block[data-type="bulleted_list"] .block-input,
.block[data-type="numbered_list"] .block-input,
.block[data-type="todo"] .block-input {
    flex: 1;
}

.list-bullet,
.list-number {
    width: 24px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 16px;
    line-height: 1.5;
    user-select: none;
    margin-top: 3px;
}

/* Todo Checkbox */
.todo-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 5px;
    flex-shrink: 0;
    transition: background 0.15s, border-color 0.15s;
}

.todo-checkbox:hover {
    border-color: var(--accent-color);
}

.todo-checkbox.checked {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.todo-checkbox.checked::after {
    content: "✓";
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.block[data-type="todo"].checked .block-input {
    text-decoration: line-through;
    color: var(--text-muted);
}

/* Toggle List */
.block[data-type="toggle"] .block-content {
    display: flex;
    align-items: flex-start;
    gap: 6px;
}

.toggle-arrow {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    transition: transform 0.15s;
    flex-shrink: 0;
    margin-top: 3px;
}

.toggle-arrow:hover {
    color: var(--text-secondary);
    background: var(--bg-hover);
    border-radius: var(--radius-sm);
}

.toggle-arrow.expanded {
    transform: rotate(90deg);
}

.toggle-arrow svg {
    width: 12px;
    height: 12px;
}

.block[data-type="toggle"] .block-input {
    flex: 1;
}

.toggle-children {
    margin-left: 28px;
    padding-left: 8px;
    border-left: 1px solid var(--border-color);
}

.toggle-children.collapsed {
    display: none;
}

/* Quote */
.block[data-type="quote"] {
    padding-left: 14px;
    border-left: 3px solid currentColor;
    color: var(--text-primary);
}

.block[data-type="quote"] .block-input {
    font-style: italic;
}

/* Divider */
.block[data-type="divider"] {
    padding: 8px 0;
}

.block[data-type="divider"] .divider-line {
    width: 100%;
    height: 1px;
    background: var(--border-color);
}

/* Callout */
.block[data-type="callout"] .block-content {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.callout-icon {
    font-size: 20px;
    flex-shrink: 0;
    cursor: pointer;
    user-select: none;
}

.callout-icon:hover {
    opacity: 0.7;
}

.block[data-type="callout"] .block-input {
    flex: 1;
}

/* Code Block */
.block[data-type="code"] .block-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.code-language {
    font-size: 12px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    outline: none;
    font-family: var(--font-mono);
    cursor: pointer;
}

.code-copy {
    font-size: 12px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.15s;
}

.block[data-type="code"]:hover .code-copy {
    opacity: 1;
}

.code-copy:hover {
    color: var(--text-primary);
}

.block[data-type="code"] pre {
    margin: 0;
    padding: 16px;
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.6;
}

.block[data-type="code"] code {
    font-family: var(--font-mono);
}

/* Image Block */
.block[data-type="image"] .block-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.image-wrapper {
    position: relative;
    max-width: 100%;
    border-radius: var(--radius-md);
    overflow: hidden;
}

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

.image-caption {
    width: 100%;
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-secondary);
    background: transparent;
    border: none;
    outline: none;
    text-align: center;
}

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

.image-upload-placeholder {
    width: 100%;
    padding: 48px;
    background: var(--bg-secondary);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    color: var(--text-secondary);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.image-upload-placeholder:hover {
    border-color: var(--accent-color);
    background: var(--bg-hover);
}

.image-upload-placeholder svg {
    margin-bottom: 12px;
    color: var(--text-muted);
}

/* AI Image Block */
.block[data-type="ai_image"] .block-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-image-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.ai-image-prompt-input {
    width: 100%;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    resize: vertical;
    min-height: 80px;
    outline: none;
    font-family: inherit;
}

.ai-image-prompt-input:focus {
    border-color: var(--accent-color);
}

.ai-image-options {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.ai-image-select {
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
}

.ai-image-form-actions {
    display: flex;
    gap: 8px;
}

.ai-image-btn {
    padding: 8px 16px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.ai-image-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

.ai-image-btn.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-color: transparent;
}

.ai-image-btn.primary:hover {
    opacity: 0.9;
}

/* AI Image Loading State */
.ai-image-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 48px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.ai-image-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.ai-image-loading-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.ai-image-loading-subtext {
    font-size: 13px;
    color: var(--text-secondary);
    font-style: italic;
    max-width: 100%;
    text-align: center;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* AI Image Result */
.ai-image-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-image-wrapper {
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-secondary);
}

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

.ai-image-error {
    padding: 48px;
    text-align: center;
    color: var(--text-muted);
}

.ai-image-model-badge {
    font-size: 12px;
    color: var(--text-muted);
    padding: 4px 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.ai-image-prompt-display {
    font-size: 13px;
    color: var(--text-secondary);
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.ai-image-actions {
    display: flex;
    gap: 8px;
}

.ai-image-error-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 32px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
}

.ai-image-error-state .retry-btn {
    margin-top: 8px;
}

/* Bookmark Block */
.block[data-type="bookmark"] .block-content {
    width: 100%;
}

.bookmark-card {
    display: flex;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: border-color 0.15s, background 0.15s;
    cursor: pointer;
}

.bookmark-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-hover);
}

.bookmark-info {
    flex: 1;
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
}

.bookmark-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bookmark-description {
    font-size: 12px;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}

.bookmark-url {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: auto;
}

.bookmark-url img {
    width: 16px;
    height: 16px;
}

.bookmark-image {
    width: 120px;
    flex-shrink: 0;
    background: var(--bg-secondary);
}

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

.bookmark-input {
    width: 100%;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
}

.bookmark-input:focus {
    border-color: var(--accent-color);
    outline: none;
}

/* AI Block */
.block[data-type="ai"] .block-content {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-block-prompt {
    width: 100%;
    padding: 12px 16px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    outline: none;
    resize: none;
    min-height: 48px;
}

.ai-block-prompt::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.ai-block-actions {
    display: flex;
    gap: 8px;
}

.ai-block-btn {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

.ai-block-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-hover);
}

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

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

.ai-block-result-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-block-model-badge {
    font-size: 11px;
    color: var(--text-muted);
    padding: 2px 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: inline-block;
    align-self: flex-start;
}

.ai-block-result {
    padding: 16px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.6;
    white-space: pre-wrap;
}

.ai-block-loading {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    color: var(--text-secondary);
}

.ai-block-loading .spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.ai-block-form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ai-block-model-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-block-model-row span {
    font-size: 13px;
    color: var(--text-secondary);
}

.ai-block-model-select {
    padding: 6px 10px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
}

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

/* Block Colors */
.block.color-gray { background: var(--color-gray); }
.block.color-brown { background: var(--color-brown); }
.block.color-orange { background: var(--color-orange); }
.block.color-yellow { background: var(--color-yellow); }
.block.color-green { background: var(--color-green); }
.block.color-blue { background: var(--color-blue); }
.block.color-purple { background: var(--color-purple); }
.block.color-pink { background: var(--color-pink); }
.block.color-red { background: var(--color-red); }

/* Add Block Button (+) */
.add-block-btn {
    position: absolute;
    left: -22px;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    color: var(--text-muted);
    transition: opacity 0.15s, background 0.15s, color 0.15s;
}

.block:hover + .add-block-btn,
.add-block-btn:hover {
    opacity: 1;
}

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

/* Empty State */
.empty-state {
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
    padding: 32px var(--content-padding);
    color: var(--text-muted);
    font-size: 14px;
    animation: fadeIn 0.3s ease;
}

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

/* ===== Slash Menu ===== */
.slash-menu {
    position: fixed;
    width: 320px;
    max-height: 400px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.slash-menu-header {
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.slash-menu-items {
    overflow-y: auto;
    max-height: 350px;
}

.slash-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.slash-item:hover,
.slash-item.selected {
    background: var(--bg-hover);
}

.slash-item-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 16px;
    flex-shrink: 0;
}

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

.slash-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.slash-item-hint {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.slash-item-ai .slash-item-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* ===== Emoji Picker ===== */
.emoji-picker {
    position: fixed;
    width: 320px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow: hidden;
}

.emoji-picker-header {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.emoji-picker-header input {
    width: 100%;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    outline: none;
}

.emoji-picker-header input:focus {
    border-color: var(--accent-color);
}

.emoji-categories {
    display: flex;
    padding: 8px;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.emoji-category {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
    flex-shrink: 0;
}

.emoji-category:hover,
.emoji-category.active {
    background: var(--bg-hover);
}

.emoji-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 4px;
    padding: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.emoji-grid span {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

.emoji-grid span:hover {
    background: var(--bg-hover);
}

/* ===== Context Menu ===== */
.block-context-menu {
    position: fixed;
    min-width: 180px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    padding: 6px;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

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

.context-divider {
    height: 1px;
    background: var(--border-color);
    margin: 6px 0;
}

/* ===== Color Picker ===== */
.color-picker {
    position: fixed;
    width: 200px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1002;
    padding: 12px;
}

.color-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-tertiary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}

.color-option {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    cursor: pointer;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: transform 0.15s, border-color 0.15s;
}

.color-option:hover {
    transform: scale(1.1);
    border-color: var(--text-secondary);
}

/* ===== AI Modal ===== */
.ai-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.ai-modal-content {
    width: 500px;
    max-width: 90vw;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.ai-modal-header {
    padding: 16px 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.ai-modal-header .ai-icon {
    font-size: 20px;
}

.ai-prompt-area {
    padding: 20px;
}

.ai-prompt-area textarea {
    width: 100%;
    min-height: 100px;
    padding: 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    resize: vertical;
    outline: none;
}

.ai-prompt-area textarea:focus {
    border-color: var(--accent-color);
}

.ai-actions {
    padding: 0 20px 16px;
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

.ai-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}

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

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

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

.ai-suggestions {
    padding: 0 20px 20px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.ai-suggestion {
    padding: 6px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.ai-suggestion:hover {
    background: var(--bg-hover);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* ===== Toast Notifications ===== */
.toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 3000;
}

.toast {
    padding: 12px 20px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    font-size: 14px;
    color: var(--text-primary);
    animation: slideIn 0.3s ease;
    display: flex;
    align-items: center;
    gap: 10px;
}

.toast.success {
    border-left: 3px solid #22c55e;
}

.toast.error {
    border-left: 3px solid #ef4444;
}

.toast.info {
    border-left: 3px solid var(--accent-color);
}

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

/* ===== Loading Overlay ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 4000;
}

[data-theme="dark"] .loading-overlay {
    background: rgba(0, 0, 0, 0.6);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* ===== Selection Toolbar ===== */
.selection-toolbar {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    display: flex;
    gap: 4px;
    z-index: 100;
    animation: fadeIn 0.15s ease;
    align-items: center;
}

.toolbar-btn {
    padding: 6px 10px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    white-space: nowrap;
}

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

.toolbar-btn svg {
    vertical-align: middle;
}

.toolbar-divider {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 4px;
}

.toolbar-model-selector {
    display: flex;
    align-items: center;
    gap: 4px;
}

.toolbar-model-label {
    font-size: 12px;
    color: var(--text-muted);
}

.toolbar-model-dropdown {
    padding: 4px 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-primary);
    cursor: pointer;
    outline: none;
}

.toolbar-model-dropdown:hover,
.toolbar-model-dropdown:focus {
    border-color: var(--border-hover);
}

/* ===== Inline Formatting Toolbar ===== */
.inline-toolbar {
    position: absolute;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 4px;
    display: flex;
    gap: 2px;
    z-index: 100;
    animation: fadeIn 0.1s ease;
}

.inline-toolbar-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

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

.inline-toolbar-btn.active {
    background: var(--bg-selected);
    color: var(--accent-color);
}

.inline-toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 4px 4px;
}

/* ===== @ Mentions ===== */
.mention-popup {
    position: fixed;
    width: 280px;
    max-height: 300px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.mention-popup-header {
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 1px solid var(--border-color);
}

.mention-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.mention-item:hover,
.mention-item.selected {
    background: var(--bg-hover);
}

.mention-item-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

.mention-item-info {
    flex: 1;
}

.mention-item-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.mention-item-hint {
    font-size: 12px;
    color: var(--text-secondary);
}

.mention-highlight {
    background: var(--bg-selected);
    color: var(--accent-color);
    padding: 0 2px;
    border-radius: var(--radius-sm);
}

/* ===== Database Block ===== */
.block[data-type="database"] .block-content {
    width: 100%;
}

.database-table {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.database-header {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.database-cell {
    flex: 1;
    padding: 10px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    border-right: 1px solid var(--border-color);
}

.database-cell:last-child {
    border-right: none;
}

.database-row {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.database-row:last-child {
    border-bottom: none;
}

.database-row .database-cell {
    font-weight: 400;
    color: var(--text-primary);
}

.database-add-row {
    padding: 10px 12px;
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.database-add-row:hover {
    background: var(--bg-hover);
    color: var(--text-secondary);
}

/* ===== Drag Preview ===== */
.drag-preview {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.9;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    padding: 8px 12px;
    font-size: 14px;
    max-width: 300px;
}

.drag-drop-indicator {
    position: absolute;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
    pointer-events: none;
    z-index: 100;
}

.drag-drop-indicator::before {
    content: '';
    position: absolute;
    left: -4px;
    top: -3px;
    width: 9px;
    height: 9px;
    background: var(--accent-color);
    border-radius: 50%;
}

/* ===== Page Templates ===== */
.template-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.template-modal-content {
    width: 600px;
    max-width: 90vw;
    max-height: 80vh;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.template-modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.template-modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: background 0.15s;
}

.template-modal-close:hover {
    background: var(--bg-hover);
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    padding: 20px;
    overflow-y: auto;
}

.template-card {
    padding: 16px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
}

.template-card:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.template-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.template-card-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.template-card-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    :root {
        --content-padding: 24px;
        --sidebar-width: 280px;
    }
    
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        height: 100vh;
        z-index: 500;
        transform: translateX(-100%);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .sidebar-backdrop {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: rgba(0, 0, 0, 0.5);
        z-index: 400;
        display: none;
    }
    
    .sidebar.open + .sidebar-backdrop {
        display: block;
    }
    
    .page-header {
        padding-top: 24px;
    }
    
    .page-title {
        font-size: 28px;
    }
    
    /* Mobile menu toggle */
    .mobile-menu-toggle {
        position: fixed;
        top: 12px;
        left: 12px;
        width: 40px;
        height: 40px;
        background: var(--bg-primary);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        display: flex;
        align-items: center;
        justify-content: center;
        z-index: 100;
        cursor: pointer;
        box-shadow: var(--shadow-sm);
    }
    
    .block-handle {
        opacity: 0.4;
        left: -20px;
    }
    
    /* Mobile adjustments for model selector */
    .model-selector-wrapper {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
    
    .toolbar-model-selector {
        flex-wrap: wrap;
    }
    
    .selection-toolbar {
        flex-wrap: wrap;
        max-width: 90vw;
    }
}

/* ===== Utilities ===== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Inline Formatting */
.text-bold { font-weight: 700; }
.text-italic { font-style: italic; }
.text-underline { text-decoration: underline; }
.text-strikethrough { text-decoration: line-through; }
.text-code {
    font-family: var(--font-mono);
    background: var(--bg-secondary);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
    font-size: 0.9em;
}

/* Link styling */
.block-input a {
    color: var(--accent-color);
    text-decoration: none;
}

.block-input a:hover {
    text-decoration: underline;
}