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

:root {
    --bg-app: #f8f9fa;
    --bg-white: #ffffff;
    --bg-hover: #f1f3f4;
    --bg-active: #e8eaed;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --text-muted: #9aa0a6;
    --accent: #1a73e8;
    --accent-hover: #1557b0;
    --accent-light: rgba(26, 115, 232, 0.08);
    --border: #dadce0;
    --border-light: #e8eaed;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.07);
    --danger: #d93025;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
}

[data-theme="dark"] {
    --bg-app: #1a1a1a;
    --bg-white: #2d2d2d;
    --bg-hover: #3d3d3d;
    --bg-active: #4d4d4d;
    --text-primary: #e8eaed;
    --text-secondary: #9aa0a6;
    --text-muted: #5f6368;
    --border: #3d3d3d;
    --border-light: #2d2d2d;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
    --shadow-md: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-lg: 0 4px 6px rgba(0,0,0,0.25);
    --accent-light: rgba(26, 115, 232, 0.2);
}

body {
    font-family: 'Google Sans', 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-app);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
}

#app {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ==================== TOP PANEL ==================== */

.top-panel {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    height: 60px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    gap: 24px;
    flex-shrink: 0;
}

.top-panel-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    font-size: 22px;
}

.storage-indicator {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-app);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.storage-indicator:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.storage-divider {
    color: var(--text-muted);
}

.top-panel-center {
    flex: 1;
    max-width: 480px;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 16px;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 24px;
    transition: all 0.2s;
}

.search-box:focus-within {
    background: var(--bg-white);
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

.search-box i {
    color: var(--text-muted);
    font-size: 14px;
}

.search-box input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

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

.top-panel-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ==================== NAVIGATION TABS ==================== */

.nav-tabs {
    display: flex;
    gap: 4px;
    padding: 8px 24px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.nav-tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.nav-tab:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.nav-tab.active {
    color: var(--accent);
    background: var(--accent-light);
}

/* ==================== MAIN CONTAINER ==================== */

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

.view-panel {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
    background: var(--bg-app);
}

.view-panel.hidden {
    display: none;
}

/* ==================== DASHBOARD ==================== */

.doc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
    padding: 32px;
    align-content: flex-start;
}

/* Document Card */
.doc-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: var(--shadow-sm);
}

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

.doc-card-preview {
    height: 140px;
    padding: 16px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e8eaed 100%);
    border-bottom: 1px solid var(--border-light);
    overflow: hidden;
}

.doc-card-preview-text {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 5;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.doc-card-preview-text .doc-empty,
.doc-empty {
    color: var(--text-muted);
    font-style: italic;
}

.doc-card-body {
    padding: 16px;
}

.doc-card-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: text;
}

.doc-card-title:hover {
    color: var(--accent);
}

.title-input {
    width: 100%;
    padding: 4px 8px;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid var(--accent);
    border-radius: var(--radius-sm);
    background: var(--bg-white);
    color: var(--text-primary);
    outline: none;
}

.doc-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

.doc-card-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.15s;
}

.doc-card:hover .doc-card-actions {
    opacity: 1;
}

.doc-card-btn {
    padding: 6px 8px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.15s;
}

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

/* Welcome State */
.welcome-state {
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 24px;
    flex: 1;
}

.welcome-state.visible {
    display: flex;
}

.welcome-icon {
    font-size: 80px;
    margin-bottom: 24px;
    opacity: 0.5;
}

.welcome-title {
    font-size: 24px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.welcome-text {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* ==================== LEARN VIEW ==================== */

.view-header {
    padding: 24px 24px 16px;
}

.view-title {
    font-size: 28px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.view-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

.learn-categories {
    display: flex;
    justify-content: center;
    gap: 12px;
    padding: 0 32px 24px;
    flex-wrap: wrap;
}

.category-pill {
    padding: 10px 20px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.category-pill:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.category-pill.active {
    background: var(--accent);
    border-color: var(--accent);
    color: white;
}

.main-content-area {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.learn-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
    padding: 0 24px 24px;
    flex: 1;
}

.learn-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.learn-card-icon {
    width: 48px;
    height: 48px;
    background: var(--accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    color: var(--accent);
    font-size: 20px;
}

.learn-card-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.4;
}

.learn-card-excerpt {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.learn-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
}

.learn-card-category {
    padding: 4px 8px;
    background: var(--accent-light);
    color: var(--accent);
    border-radius: 12px;
    text-transform: capitalize;
}

.learn-card-read {
    color: var(--text-muted);
}

/* ==================== HELP VIEW ==================== */

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    padding: 0 24px 24px;
}

.help-card {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px;
    cursor: pointer;
    transition: all 0.2s;
}

.help-card:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}

.help-card-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-app);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 18px;
}

.help-card h3 {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.help-card p {
    font-size: 13px;
    color: var(--text-secondary);
}

.help-section {
    padding: 0 32px 24px;
}

.help-section h3 {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.policy-links {
    display: flex;
    gap: 20px;
}

.policy-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    text-decoration: none;
    font-size: 14px;
}

.policy-link:hover {
    text-decoration: underline;
}

.help-section p {
    font-size: 14px;
    color: var(--text-secondary);
}

.help-section a {
    color: var(--accent);
}

/* ==================== BACK BUTTON ==================== */

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    margin: 24px 32px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s;
}

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

/* ==================== ARTICLE CONTENT ==================== */

.article-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 32px 32px;
    line-height: 1.7;
    overflow-y: auto;
    flex: 1;
}

.article-content h1 {
    font-size: 32px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 24px;
}

.article-content h2 {
    font-size: 22px;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 16px;
}

.article-content h3 {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 24px;
    margin-bottom: 12px;
}

.article-content p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article-content li {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.article-content strong {
    color: var(--text-primary);
}

.article-content .article-intro {
    font-size: 18px;
    color: var(--text-secondary);
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-light);
    margin-bottom: 24px;
}

.shortcuts-list {
    margin: 16px 0;
}

.shortcut-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
}

.shortcut-row kbd {
    padding: 4px 10px;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: 'Consolas', monospace;
    font-size: 13px;
}

.shortcut-row span {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==================== POLICY CONTENT ==================== */

.policy-content {
    max-width: 720px;
    margin: 0 auto;
    padding: 0 32px 32px;
    line-height: 1.7;
    overflow-y: auto;
    flex: 1;
}

.policy-content h1 {
    font-size: 28px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.policy-content h2 {
    font-size: 18px;
    font-weight: 500;
    color: var(--text-primary);
    margin-top: 28px;
    margin-bottom: 12px;
}

.policy-content p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.policy-content ul {
    margin-bottom: 16px;
    padding-left: 24px;
}

.policy-content li {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.policy-content a {
    color: var(--accent);
}

.policy-date {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-light);
}

/* ==================== EDITOR ==================== */

.editor-view {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    background: var(--bg-app);
    z-index: 100;
}

.editor-view.hidden {
    display: none;
}

.editor-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 16px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
}

.editor-back {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.15s;
}

.editor-back:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.editor-tabs {
    display: flex;
    gap: 4px;
    flex: 1;
    overflow-x: auto;
}

.editor-tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-app);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    white-space: nowrap;
    max-width: 180px;
    transition: all 0.15s;
}

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

.editor-tab.active {
    background: var(--bg-white);
    border-color: var(--border);
    color: var(--text-primary);
    box-shadow: var(--shadow-sm);
}

.editor-tab-title {
    overflow: hidden;
    text-overflow: ellipsis;
}

.editor-tab-close {
    padding: 2px 6px;
    background: none;
    border: none;
    border-radius: 2px;
    color: inherit;
    cursor: pointer;
    font-size: 16px;
    opacity: 0.6;
}

.editor-tab-close:hover {
    opacity: 1;
    background: var(--bg-active);
}

.editor-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
}

.save-status {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: var(--text-muted);
}

.save-status i {
    font-size: 10px;
}

.save-status.saving {
    color: var(--warning);
}

.save-status.saving i {
    animation: spin 1s linear infinite;
}

.save-status.saved {
    color: #1e8e3e;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.editor-actions {
    position: relative;
    display: flex;
    gap: 8px;
}

/* More Actions Menu */
.more-actions-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 4px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 6px;
    min-width: 180px;
    box-shadow: var(--shadow-lg);
    z-index: 100;
    display: none;
}

.more-actions-menu.visible {
    display: block;
}

.more-actions-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 10px 12px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}

.more-actions-item:hover {
    background: var(--bg-hover);
}

.more-actions-item i {
    width: 16px;
    color: var(--text-secondary);
}

.more-actions-divider {
    height: 1px;
    background: var(--border-light);
    margin: 6px 0;
}

/* Toolbar */
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 16px;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    overflow-x: auto;
}

.toolbar-group {
    display: flex;
    gap: 2px;
}

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border);
    margin: 0 8px;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 0 8px;
    height: 34px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
    white-space: nowrap;
}

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

.toolbar-btn.active {
    background: var(--accent-light);
    color: var(--accent);
}

.font-size-value {
    font-size: 13px;
    font-weight: 500;
}

/* Toolbar Dropdown */
.toolbar-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    margin-top: 4px;
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 100;
    max-height: 280px;
    overflow-y: auto;
    padding: 6px;
    min-width: 80px;
}

.toolbar-dropdown-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 8px 12px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    text-align: left;
    transition: background 0.15s;
}

.toolbar-dropdown-item:hover {
    background: var(--bg-hover);
}

.spacing-preview {
    font-size: 16px;
    color: var(--text-secondary);
}

/* Editor Area - Page Based Layout */
.editor-area {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 40px;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--bg-app);
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.pages-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    width: 100%;
    contain: layout style;
}

.page-sheet {
    position: relative;
    width: 816px;
    min-height: 1056px;
    background: var(--bg-white);
    border: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 4px 12px rgba(0, 0, 0, 0.05);
    contain: layout style;
    content-visibility: auto;
    contain-intrinsic-size: 0 1056px;
}

.page-sheet.active {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12), 0 8px 24px rgba(0, 0, 0, 0.08);
    border-color: var(--accent);
}

.page-content {
    position: absolute;
    top: 72px;
    left: 72px;
    right: 72px;
    bottom: 72px;
    outline: none;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    overflow: hidden;
    word-wrap: break-word;
    will-change: contents;
    contain: layout style;
}

.page-content:focus {
    outline: none;
}

.page-content[contenteditable="false"] {
    pointer-events: none;
}

.page-content p {
    margin-bottom: 12px;
}

.page-content h1 {
    font-size: 26px;
    font-weight: 400;
    margin: 24px 0 12px;
    line-height: 1.3;
}

.page-content h2 {
    font-size: 20px;
    font-weight: 400;
    margin: 20px 0 10px;
}

.page-content h3 {
    font-size: 16px;
    font-weight: 500;
    margin: 16px 0 8px;
}

.page-content ul,
.page-content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.page-content li {
    margin: 6px 0;
}

.page-content code {
    background: var(--bg-app);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 13px;
    color: #d93025;
}

.page-content pre {
    background: var(--bg-app);
    padding: 16px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 16px 0;
}

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

.page-content blockquote {
    border-left: 4px solid var(--accent);
    padding-left: 16px;
    margin: 16px 0;
    color: var(--text-secondary);
}

.page-content a {
    color: var(--accent);
}

.page-number {
    position: absolute;
    bottom: 24px;
    left: 0;
    right: 0;
    text-align: center;
    font-size: 12px;
    color: var(--text-muted);
    font-family: 'Google Sans', 'Roboto', sans-serif;
    pointer-events: none;
}

/* Editor Footer */
.editor-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 8px 24px;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
}

.editor-stats {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--text-muted);
}

.stats-divider {
    color: var(--border);
}

/* ==================== ADS ==================== */

.content-with-ads {
    display: flex;
    flex: 1;
    overflow: hidden;
}

.sidebar-ad {
    width: 180px;
    flex-shrink: 0;
    padding: 16px;
    overflow-y: auto;
}

.sidebar-ad-left {
    border-right: 1px solid var(--border-light);
}

.sidebar-ad-right {
    border-left: 1px solid var(--border-light);
}

.ad-container-vertical {
    position: sticky;
    top: 16px;
}

.ad-placeholder-vertical {
    width: 160px;
    height: 600px;
    max-width: 100%;
}

.ad-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px 32px;
    background: var(--bg-white);
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

.ad-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.ad-wrapper {
    display: flex;
    justify-content: center;
    width: 100%;
}

.ad-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-app);
    border: 1px dashed var(--border);
    border-radius: var(--radius-md);
    color: var(--text-muted);
    font-size: 13px;
    width: 100%;
    max-width: 728px;
    height: 90px;
}

.ad-placeholder-medium {
    max-width: 300px;
    height: 250px;
}

.ad-placeholder-text {
    font-weight: 500;
}

.ad-placeholder-size {
    font-size: 11px;
    margin-top: 4px;
    opacity: 0.7;
}

/* ==================== BUTTONS ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s;
}

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

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

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

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

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

.btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    padding: 0;
    background: none;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

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

/* ==================== MODAL ==================== */

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
}

.modal-content {
    position: relative;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 400px;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    animation: modalIn 0.2s ease;
}

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--border-light);
}

.modal-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    transition: all 0.15s;
}

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

.modal-body {
    padding: 20px 24px;
}

.modal-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 16px 24px;
    border-top: 1px solid var(--border-light);
}

/* Template List */
.template-list {
    display: grid;
    gap: 10px;
}

.template-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    background: var(--bg-app);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.15s;
}

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

.template-icon {
    font-size: 28px;
}

.template-name {
    font-size: 14px;
    font-weight: 500;
}

/* Storage Details */
.storage-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.storage-stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--bg-app);
    border-radius: var(--radius-md);
    font-size: 14px;
}

.storage-stat span:first-child {
    color: var(--text-secondary);
}

.storage-stat span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

.storage-bar {
    height: 8px;
    background: var(--bg-app);
    border-radius: 4px;
    overflow: hidden;
}

.storage-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.storage-note {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
}

/* ==================== SCROLLBAR ==================== */

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

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

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

/* ==================== RESPONSIVE ==================== */

@media (max-width: 900px) {
    .top-panel {
        padding: 0 16px;
        gap: 16px;
    }

    .top-panel-center {
        display: none;
    }

    .doc-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
        padding: 20px;
    }

    .learn-grid,
    .help-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        padding: 0 20px 20px;
    }

    .view-header {
        padding: 24px 20px 12px;
    }

    .learn-categories {
        padding: 0 20px 16px;
    }

    .sidebar-ad {
        display: none;
    }

    .content-with-ads {
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .sort-select {
        display: none;
    }

    .editor-area {
        padding: 16px;
    }

    .pages-container {
        gap: 16px;
    }

    .page-sheet {
        width: 100%;
        min-height: auto;
    }

    .page-content {
        position: relative;
        top: auto;
        left: auto;
        right: auto;
        bottom: auto;
        padding: 24px;
        min-height: 400px;
    }

    .view-header,
    .learn-grid,
    .help-grid,
    .help-section {
        padding-left: 16px;
        padding-right: 16px;
    }

    .back-btn {
        margin: 16px;
    }

    .article-content,
    .policy-content {
        padding: 0 16px 24px;
    }

    .learn-categories {
        padding: 0 16px 16px;
        flex-wrap: wrap;
    }

    .ad-placeholder {
        max-width: 100%;
        height: 60px;
    }

    .logo {
        font-size: 16px;
    }

    .logo-icon {
        font-size: 20px;
    }

    .storage-indicator {
        display: none;
    }

    .sidebar-ad {
        display: none;
    }

    .content-with-ads {
        flex-direction: column;
    }
}

/* ==================== PRINT STYLES ==================== */

@media print {
    @page {
        size: A4;
        margin: 0;
    }
    
    body {
        background: white !important;
    }
    
    body * {
        visibility: hidden;
    }
    
    #editor-view,
    #editor-view * {
        visibility: visible;
    }
    
    #editor-view {
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
        background: white !important;
    }
    
    .editor-header,
    .editor-toolbar,
    .editor-footer,
    .editor-actions,
    #btn-back,
    .editor-tabs,
    .page-number {
        display: none !important;
    }
    
    .editor-area {
        padding: 0 !important;
        background: white !important;
        overflow: visible !important;
    }
    
    .pages-container {
        display: block !important;
        width: 100% !important;
        gap: 0 !important;
    }
    
    .page-sheet {
        width: 100% !important;
        min-height: auto !important;
        border: none !important;
        box-shadow: none !important;
        page-break-after: always;
        page-break-inside: avoid;
    }
    
    .page-sheet:last-child {
        page-break-after: auto;
    }
    
    .page-content {
        position: relative !important;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        bottom: auto !important;
        padding: 48px !important;
        overflow: visible !important;
        color: #333 !important;
        font-family: 'Georgia', serif !important;
        font-size: 11pt !important;
        line-height: 1.6 !important;
    }
    
    .page-content h1 {
        font-size: 24pt !important;
        font-weight: bold !important;
        margin: 0 0 14pt 0 !important;
        page-break-after: avoid !important;
        color: #1a1a1a !important;
    }
    
    .page-content h2 {
        font-size: 16pt !important;
        font-weight: bold !important;
        margin: 18pt 0 10pt 0 !important;
        page-break-after: avoid !important;
        color: #333 !important;
    }
    
    .page-content h3 {
        font-size: 13pt !important;
        font-weight: bold !important;
        margin: 14pt 0 6pt 0 !important;
        page-break-after: avoid !important;
        color: #444 !important;
    }
    
    .page-content p {
        margin: 0 0 10pt 0 !important;
        orphans: 2 !important;
        widows: 2 !important;
    }
    
    .page-content ul,
    .page-content ol {
        margin: 0 0 10pt 18pt !important;
    }
    
    .page-content li {
        margin: 0 0 4pt 0 !important;
    }
    
    .page-content blockquote {
        margin: 10pt 0 10pt 16pt !important;
        padding: 6pt 10pt !important;
        border-left: 3pt solid #ccc !important;
        font-style: italic !important;
        color: #555 !important;
    }
    
    .page-content pre {
        background: #f8f8f8 !important;
        padding: 10pt !important;
        margin: 10pt 0 !important;
        font-family: 'Courier New', monospace !important;
        font-size: 9pt !important;
        white-space: pre-wrap !important;
        word-wrap: break-word !important;
    }
    
    .page-content code {
        font-family: 'Courier New', monospace !important;
        font-size: 10pt !important;
        background: #f0f0f0 !important;
        padding: 1pt 3pt !important;
    }
    
    .page-content a {
        color: #1a73e8 !important;
        text-decoration: underline !important;
    }
    
    .page-content strong,
    .page-content b {
        font-weight: bold !important;
    }
    
    .page-content em,
    .page-content i {
        font-style: italic !important;
    }
}