/* Stablecoins in Travel - Styles
   Version: 2.14.0
   Responsive, accessible, document-first design with AI chat, themes, print, PDF, and discussions
*/

/* CSS Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
}

:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-muted: #666666;
    --color-border: #e5e5e5;
    --color-accent: #2563eb;
    --color-accent-hover: #1d4ed8;
    --color-sidebar-bg: #f8f9fa;
    --color-code-bg: #f3f4f6;
    --color-link: #2563eb;
    --color-link-visited: #7c3aed;

    --sidebar-width: 300px;
    --content-max-width: 800px;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* Font size scaling (1 = 100%, adjustable via controls) */
    --font-scale: 1;

    /* Chat sidebar */
    --chat-sidebar-width: 380px;
    --chat-user-bubble: var(--color-accent);
    --chat-user-text: #ffffff;
    --chat-assistant-bubble: var(--color-sidebar-bg);
    --chat-assistant-text: var(--color-text);
}

/* Dark mode colors */
[data-theme="dark"] {
    --color-bg: #1a1a1a;
    --color-text: #e5e5e5;
    --color-text-muted: #a0a0a0;
    --color-border: #333333;
    --color-accent: #60a5fa;
    --color-accent-hover: #93c5fd;
    --color-sidebar-bg: #242424;
    --color-code-bg: #2d2d2d;
    --color-link: #60a5fa;
    --color-link-visited: #a78bfa;
}

/* Sepia/warm reading mode */
[data-theme="sepia"] {
    --color-bg: #f4ecd8;
    --color-text: #433422;
    --color-text-muted: #6b5c4a;
    --color-border: #d4c4a8;
    --color-accent: #8b6914;
    --color-accent-hover: #6b5010;
    --color-sidebar-bg: #ebe3d0;
    --color-code-bg: #e8dfc8;
    --color-link: #6b4c1a;
    --color-link-visited: #5a3d15;
}

/* Respect system preference when no explicit theme set */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #1a1a1a;
        --color-text: #e5e5e5;
        --color-text-muted: #a0a0a0;
        --color-border: #333333;
        --color-accent: #60a5fa;
        --color-accent-hover: #93c5fd;
        --color-sidebar-bg: #242424;
        --color-code-bg: #2d2d2d;
        --color-link: #60a5fa;
        --color-link-visited: #a78bfa;
    }
}

html {
    /* scroll-behavior: auto = instant, smooth = animated (~400ms, browser-controlled) */
    scroll-behavior: auto;
    scroll-padding-top: var(--spacing-lg);
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: calc(1rem * var(--font-scale));
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
}

/* Screen reader only */
.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;
}

/* Layout */
.layout {
    display: flex;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--color-sidebar-bg);
    border-right: 1px solid var(--color-border);
    z-index: 100;
}

.sidebar-header {
    flex-shrink: 0;
    padding: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

/* Book cover in sidebar */
.book-cover {
    width: 100%;
    height: auto;
    border-radius: 6px;
    margin-bottom: var(--spacing-md);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: width var(--transition-normal), margin var(--transition-normal);
}

/* Scrolled state - shrink cover, hide other header elements */
.sidebar.scrolled .book-cover {
    width: 70%;
    margin-bottom: var(--spacing-sm);
}

.sidebar.scrolled .site-title,
.sidebar.scrolled .site-subtitle,
.sidebar.scrolled .last-updated,
.sidebar.scrolled .theme-toggle {
    display: none;
}

.sidebar.scrolled .sidebar-header {
    padding-bottom: var(--spacing-sm);
}

.site-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--color-text);
}

.site-subtitle {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-sm) 0;
}

.last-updated {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin: 0;
}

/* Theme toggle */
.theme-toggle {
    display: flex;
    align-items: center;
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.theme-toggle-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

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

/* Hide all theme icons by default */
.theme-toggle-btn .icon-sun,
.theme-toggle-btn .icon-moon,
.theme-toggle-btn .icon-sepia {
    display: none;
}

/* Light mode: show moon (click to go dark) */
[data-theme="light"] .theme-toggle-btn .icon-moon {
    display: block;
}

/* Dark mode: show sepia/book (click to go sepia) */
[data-theme="dark"] .theme-toggle-btn .icon-sepia {
    display: block;
}

/* Sepia mode: show sun (click to go light) */
[data-theme="sepia"] .theme-toggle-btn .icon-sun {
    display: block;
}

/* Default state (no theme set) - show moon */
:root:not([data-theme]) .theme-toggle-btn .icon-moon {
    display: block;
}

/* Reading Controls (Theme + Font Size) */
.reading-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    flex-wrap: wrap;
}

/* Font Size Controls (EPUB-style) */
.font-size-controls {
    display: flex;
    align-items: center;
    gap: 2px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 2px;
}

.font-size-btn {
    background: none;
    border: none;
    border-radius: 4px;
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 28px;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.font-size-btn:hover:not(:disabled) {
    background: var(--color-sidebar-bg);
    color: var(--color-text);
}

.font-size-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.font-size-btn .label-decrease {
    font-size: 0.75rem;
}

.font-size-btn .label-increase {
    font-size: 1rem;
}

.font-size-indicator {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    min-width: 32px;
    text-align: center;
    font-variant-numeric: tabular-nums;
}

/* Download PDF button */
.download-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: var(--spacing-xs) var(--spacing-sm);
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    text-decoration: none;
    transition: border-color var(--transition-fast), color var(--transition-fast);
}

.download-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-text);
}

.download-btn:visited {
    color: var(--color-text-muted);
}

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

/* Hide font controls in scrolled state */
.sidebar.scrolled .reading-controls {
    display: none;
}

/* Search */
.search-container {
    position: relative;
    flex-shrink: 0;
    padding: 0 var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

#search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-bg);
    transition: border-color var(--transition-fast);
}

#search-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-height: 300px;
    overflow-y: auto;
    display: none;
    z-index: 200;
}

.search-results.active {
    display: block;
}

.search-result-item {
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: background var(--transition-fast);
}

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

.search-result-item:hover,
.search-result-item:focus {
    background: var(--color-sidebar-bg);
}

.search-result-item a {
    text-decoration: none;
    color: var(--color-text);
    display: block;
}

.search-result-title {
    font-weight: 600;
    font-size: 0.875rem;
}

.search-result-context {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* Search highlighting */
.search-result-item mark {
    background: #fef08a;
    color: #1a1a1a;
    padding: 0 2px;
    border-radius: 2px;
}

[data-theme="dark"] .search-result-item mark,
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .search-result-item mark {
        background: #854d0e;
        color: #fef08a;
    }
}

/* Main content search highlighting */
mark.search-highlight {
    background: #fef08a;
    color: #1a1a1a;
    padding: 1px 3px;
    border-radius: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] mark.search-highlight {
    background: #854d0e;
    color: #fef08a;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) mark.search-highlight {
        background: #854d0e;
        color: #fef08a;
    }
}

/* Navigation */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
}

.hamburger {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-list {
    list-style: none;
    padding: 0 var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    margin: 0;
    flex: 1;
    overflow-y: auto;
}

.nav-chapter {
    margin-bottom: var(--spacing-md);
}

.nav-chapter-link {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text);
    text-decoration: none;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.nav-chapter-link:hover,
.nav-chapter-link:focus {
    color: var(--color-accent);
}

.nav-sections {
    list-style: none;
    padding: 0 0 0 var(--spacing-md);
    margin: var(--spacing-xs) 0 0 0;
}

.nav-sections li {
    margin-bottom: var(--spacing-xs);
}

.nav-sections a {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    text-decoration: none;
    display: block;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.nav-sections a:hover,
.nav-sections a:focus {
    color: var(--color-accent);
}

/* Active navigation state (ScrollSpy) */
.nav-chapter-link.active,
.nav-sections a.active {
    color: var(--color-accent);
    font-weight: 600;
}

.nav-sections a.active {
    border-left: 2px solid var(--color-accent);
    padding-left: calc(var(--spacing-xs) - 2px);
    margin-left: -2px;
}

/* Reading Position Bar */
.reading-position-bar {
    position: sticky;
    top: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    z-index: 50;
    display: flex;
    gap: var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.reading-position-bar.visible {
    opacity: 1;
}

.reading-chapter {
    font-weight: 600;
    color: var(--color-text);
}

.reading-section::before {
    content: "›";
    margin-right: var(--spacing-xs);
}

/* Offset for sticky bar when navigating to sections */
h1[id], h2[id], section[id] {
    scroll-margin-top: 60px;
}

/* Main Content */
.content {
    margin-left: var(--sidebar-width);
    flex: 1;
    padding: var(--spacing-2xl);
    max-width: calc(var(--sidebar-width) + var(--content-max-width) + var(--spacing-2xl) * 2);
}

article {
    max-width: var(--content-max-width);
}

/* Chapter sections */
.chapter-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

.chapter-section:last-child {
    border-bottom: none;
}

/* Front matter sections */
.front-matter-section {
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
}

/* Chapter cover images */
.chapter-figure {
    margin: 0 0 var(--spacing-xl) 0;
    padding: 0;
}

.chapter-figure img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    display: block;
}

.chapter-figure figcaption {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    font-style: italic;
    margin-top: var(--spacing-sm);
    text-align: center;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: var(--spacing-xl) 0 var(--spacing-md) 0;
    line-height: 1.3;
    font-weight: 700;
    position: relative;
}

h1:first-child,
h2:first-child,
h3:first-child {
    margin-top: 0;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.125rem; }
h5 { font-size: 1rem; }
h6 { font-size: 0.875rem; }

/* Copy link button */
.heading-anchor {
    display: inline-block;
    margin-left: var(--spacing-sm);
    opacity: 0;
    transition: opacity var(--transition-fast);
    color: var(--color-text-muted);
    text-decoration: none;
    font-weight: normal;
    vertical-align: middle;
}

h1:hover .heading-anchor,
h2:hover .heading-anchor,
h3:hover .heading-anchor,
h4:hover .heading-anchor,
h5:hover .heading-anchor,
h6:hover .heading-anchor,
.heading-anchor:focus {
    opacity: 1;
}

.heading-anchor:hover {
    color: var(--color-accent);
}

/* Section Share Button (LinkedIn) */
/* Section action buttons - positioned in heading */
.section-discuss-btn,
.section-share-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    padding: 0;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
    color: var(--color-text-muted);
}

.section-share-btn {
    right: 0;
    transition: all var(--transition-fast);
    color: var(--color-text-muted);
}

.section-discuss-btn {
    right: 32px;
}

h2:hover .section-share-btn,
h2:hover .section-discuss-btn {
    opacity: 1;
}

.section-share-btn:hover {
    color: #0077b5;
    border-color: #0077b5;
    background: rgba(0, 119, 181, 0.1);
}

.section-discuss-btn:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: rgba(37, 99, 235, 0.1);
}

.section-share-btn:focus,
.section-discuss-btn:focus {
    opacity: 1;
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Selection Share Popup - floating button when text is selected */
.selection-share-popup {
    position: absolute;
    z-index: 1000;
    transform: translateX(-50%);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-fast), visibility var(--transition-fast);
    pointer-events: none;
    display: flex;
    gap: 6px;
}

.selection-share-popup.visible {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.selection-ask-btn,
.selection-discuss-btn,
.selection-share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.selection-ask-btn {
    background: var(--color-accent, #2563eb);
}

.selection-ask-btn:hover {
    background: #1d4ed8;
    transform: scale(1.05);
}

.selection-discuss-btn {
    background: #64748b;
}

.selection-discuss-btn:hover {
    background: #475569;
    transform: scale(1.05);
}

.selection-share-btn {
    background: #0077b5;
}

.selection-share-btn:hover {
    background: #005f8f;
    transform: scale(1.05);
}

.selection-ask-btn svg,
.selection-discuss-btn svg,
.selection-share-btn svg {
    flex-shrink: 0;
}

/* Section Question Button */
.section-question-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: var(--spacing-sm);
    padding: 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    transition: all var(--transition-fast);
    vertical-align: middle;
}

/* Desktop: show on hover */
h2:hover .section-question-btn {
    opacity: 1;
}

/* Mobile: always visible */
@media (max-width: 768px) {
    .section-question-btn {
        opacity: 0.6;
    }
}

.section-question-btn:hover {
    color: white;
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.section-question-btn:focus {
    opacity: 1;
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Question Popover */
.question-popover {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 100;
    min-width: 300px;
    max-width: 400px;
    margin-top: var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.question-popover-header {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    border-bottom: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.question-popover-list {
    padding: var(--spacing-sm);
}

.question-popover-btn {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    font-size: 0.875rem;
    text-align: left;
    color: var(--color-text);
    background: var(--color-sidebar-bg);
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.question-popover-btn:last-child {
    margin-bottom: 0;
}

.question-popover-btn:hover {
    background: var(--color-accent);
    color: white;
}

/* Custom question input in popover */
.question-popover-input-wrapper {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.question-popover-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    color: var(--color-text);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    outline: none;
    transition: border-color var(--transition-fast);
}

.question-popover-input:focus {
    border-color: var(--color-accent);
}

.question-popover-input::placeholder {
    color: var(--color-text-muted);
}

p {
    margin: 0 0 var(--spacing-md) 0;
}

a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: 2px;
}

a:visited {
    color: var(--color-link-visited);
}

a:hover,
a:focus {
    color: var(--color-accent-hover);
}

/* Lists */
ul, ol {
    margin: 0 0 var(--spacing-md) 0;
    padding-left: var(--spacing-lg);
}

li {
    margin-bottom: var(--spacing-xs);
}

/* Code */
code {
    font-family: var(--font-mono);
    font-size: 0.875em;
    background: var(--color-code-bg);
    padding: 0.125em 0.375em;
    border-radius: 4px;
}

pre {
    background: var(--color-code-bg);
    padding: var(--spacing-md);
    border-radius: 6px;
    overflow-x: auto;
    margin: 0 0 var(--spacing-md) 0;
}

pre code {
    background: none;
    padding: 0;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 var(--spacing-md) 0;
    font-size: 0.875rem;
}

th, td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

th {
    font-weight: 600;
    background: var(--color-sidebar-bg);
}

/* Blockquotes */
blockquote {
    margin: 0 0 var(--spacing-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 4px solid var(--color-accent);
    background: var(--color-sidebar-bg);
    font-style: italic;
}

blockquote p:last-child {
    margin-bottom: 0;
}

/* Horizontal rules */
hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-xl) 0;
}

/* Strong/Bold emphasis */
strong {
    font-weight: 700;
}

em {
    font-style: italic;
}

/* Toast notification */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--color-text);
    color: var(--color-bg);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 6px;
    font-size: 0.875rem;
    opacity: 0;
    transition: transform var(--transition-normal), opacity var(--transition-normal);
    z-index: 1000;
}

.toast.visible {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Share toast - very prominent, centered */
.toast.share-toast {
    bottom: auto !important;
    top: 30% !important;
    background: #0077b5;
    color: white;
    padding: 24px 48px;
    font-size: 1.5rem;
    font-weight: 700;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
    text-align: center;
    max-width: 90%;
    border-radius: 16px;
    z-index: 10000;
}

.toast.share-toast.visible {
    transform: translateX(-50%) translateY(0) !important;
    opacity: 1 !important;
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Mobile styles */
@media (max-width: 900px) {
    .sidebar {
        position: fixed;
        left: -100%;
        width: 280px;
        transition: left var(--transition-normal);
        box-shadow: none;
    }

    .sidebar.open {
        left: 0;
        box-shadow: 4px 0 20px rgba(0, 0, 0, 0.1);
    }

    .nav-toggle {
        display: block;
        position: fixed;
        top: var(--spacing-md);
        left: var(--spacing-md);
        z-index: 150;
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius: 6px;
        width: 44px;
        height: 44px;
    }

    .content {
        margin-left: 0;
        padding: var(--spacing-xl) var(--spacing-md);
        padding-top: calc(var(--spacing-xl) + 44px);
    }

    h1 { font-size: 1.5rem; }
    h2 { font-size: 1.25rem; }
    h3 { font-size: 1.125rem; }

    .heading-anchor {
        opacity: 0.5;
    }
}

/* Overlay for mobile nav */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 90;
}

.nav-overlay.active {
    display: block;
}

/* ===========================================
   PRINT STYLES
   =========================================== */
@media print {
    /* Reset colors for print */
    :root,
    [data-theme="dark"],
    [data-theme="light"] {
        --color-bg: #ffffff;
        --color-text: #000000;
        --color-text-muted: #333333;
        --color-border: #cccccc;
        --color-accent: #000000;
        --color-sidebar-bg: #ffffff;
        --color-code-bg: #f5f5f5;
        --color-link: #000000;
        --color-link-visited: #000000;
    }

    /* Hide non-printable elements */
    .sidebar,
    .nav-toggle,
    .nav-overlay,
    .toast,
    .search-container,
    .theme-toggle,
    .reading-controls,
    .heading-anchor {
        display: none !important;
    }

    /* Reset layout for print */
    body {
        font-size: 11pt;
        line-height: 1.5;
        background: white;
        color: black;
    }

    .layout {
        display: block;
    }

    .content {
        margin-left: 0;
        padding: 0;
        max-width: 100%;
    }

    article {
        max-width: 100%;
    }

    /* Print header - show title at top of print */
    .content::before {
        content: "Stablecoins in Travel: The Implementation Guide";
        display: block;
        font-size: 18pt;
        font-weight: 700;
        text-align: center;
        margin-bottom: 24pt;
        padding-bottom: 12pt;
        border-bottom: 2px solid #000;
    }

    /* Typography for print */
    h1 { font-size: 18pt; }
    h2 { font-size: 14pt; }
    h3 { font-size: 12pt; }
    h4, h5, h6 { font-size: 11pt; }

    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
        break-after: avoid;
    }

    /* Chapter sections for print */
    .chapter-section,
    .front-matter-section {
        page-break-before: always;
        break-before: page;
        border-bottom: none;
        padding-bottom: 0;
    }

    /* First section shouldn't force a page break */
    .front-matter-section:first-child,
    article > section:first-child {
        page-break-before: avoid;
        break-before: avoid;
    }

    /* Avoid orphans and widows */
    p, li, blockquote {
        orphans: 3;
        widows: 3;
    }

    /* Don't break inside these elements */
    pre, blockquote, table, figure {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    /* Links - show URL after link text */
    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #666;
        word-break: break-all;
    }

    /* Don't show URL for internal links */
    a[href^="#"]::after {
        content: none;
    }

    /* Code blocks */
    pre {
        background: #f5f5f5 !important;
        border: 1px solid #ccc;
        font-size: 9pt;
        overflow-wrap: break-word;
        white-space: pre-wrap;
    }

    code {
        font-size: 9pt;
    }

    /* Tables */
    table {
        font-size: 9pt;
    }

    th {
        background: #f0f0f0 !important;
    }

    /* Images */
    img {
        max-width: 100% !important;
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .chapter-figure {
        page-break-inside: avoid;
        break-inside: avoid;
    }

    .book-cover {
        display: none;
    }

    /* Blockquotes */
    blockquote {
        border-left-color: #000;
        background: #f9f9f9 !important;
    }

    /* Remove decorative elements */
    hr {
        border-top-color: #ccc;
    }

    /* Page margins */
    @page {
        margin: 1in;
        size: letter;
    }

    @page :first {
        margin-top: 0.5in;
    }

    /* Hide chat in print */
    .chat-toggle,
    .chat-sidebar,
    .chat-mobile-bar {
        display: none !important;
    }
}

/* ===========================================
   AI CHAT SIDEBAR
   =========================================== */

/* Chat Toggle Button (Desktop) */
.chat-toggle {
    position: fixed;
    right: var(--spacing-lg);
    bottom: var(--spacing-lg);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #ffffff;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    z-index: 300;
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.chat-toggle:hover {
    transform: scale(1.05);
    background: var(--color-accent-hover);
}

.chat-toggle svg {
    width: 24px;
    height: 24px;
}

.chat-toggle .chat-icon-close {
    display: none;
}

.chat-toggle[aria-expanded="true"] .chat-icon-open {
    display: none;
}

.chat-toggle[aria-expanded="true"] .chat-icon-close {
    display: block;
}

/* Chat Sidebar */
.chat-sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: var(--chat-sidebar-width);
    height: 100vh;
    background: var(--color-bg);
    border-left: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    z-index: 250;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.chat-sidebar.open {
    transform: translateX(0);
}

/* Adjust content when chat is open */
.layout.chat-open .content {
    margin-right: var(--chat-sidebar-width);
    transition: margin-right var(--transition-normal);
}

.layout.chat-open .content article {
    max-width: calc(100vw - var(--sidebar-width) - var(--chat-sidebar-width) - var(--spacing-2xl) * 2);
}

/* Chat Header */
.chat-header {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-sidebar-bg);
}

.chat-title {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--color-text);
}

/* Toggle button - subtle slider style */
.chat-close {
    background: var(--color-border);
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs) var(--spacing-sm);
    color: var(--color-text-muted);
    border-radius: 12px;
    transition: color var(--transition-fast), background var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
}

.chat-close:hover {
    color: var(--color-text);
    background: var(--color-text-muted);
}

.chat-close:hover svg {
    color: var(--color-bg);
}

.chat-close svg {
    width: 14px;
    height: 14px;
}

/* Chat Tabs */
.chat-tabs {
    display: flex;
    gap: 2px;
    background: var(--color-border);
    border-radius: 8px;
    padding: 2px;
}

.chat-tab-btn {
    background: transparent;
    border: none;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: 6px;
    transition: all var(--transition-fast);
}

.chat-tab-btn:hover {
    color: var(--color-text);
}

.chat-tab-btn.active {
    background: var(--color-bg);
    color: var(--color-text);
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

/* Chat Panels */
.chat-panel {
    display: none;
    flex-direction: column;
    flex: 1;
    overflow: hidden;
}

.chat-panel.active {
    display: flex;
}

/* Community List */
.community-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.community-loading {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

.community-empty {
    text-align: center;
    color: var(--color-text-muted);
    padding: var(--spacing-xl);
}

/* Discuss tab placeholder */
/* Only apply placeholder styling when showing the "coming soon" message */
.discuss-placeholder:has(.discuss-coming-soon) {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--spacing-xl);
}

/* Reset for when we have actual content */
.discuss-placeholder:not(:has(.discuss-coming-soon)) {
    display: block;
}

.discuss-coming-soon {
    text-align: center;
    max-width: 280px;
}

.discuss-coming-soon svg {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.discuss-coming-soon h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.discuss-coming-soon p {
    margin: 0 0 var(--spacing-md) 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.coming-soon-badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-accent);
    color: white;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ============================================
   DISCUSSIONS
   ============================================ */

/* Discussion indicators on paragraphs */
.discussion-indicator {
    position: absolute;
    right: -40px;
    top: 2px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--color-accent);
    transition: all var(--transition-fast);
}

.discussion-indicator:hover {
    background: rgba(59, 130, 246, 0.2);
    transform: scale(1.05);
}

.discussion-indicator svg {
    opacity: 0.8;
    width: 14px;
    height: 14px;
}

.discussion-count {
    font-weight: 600;
}

/* Hide indicators on mobile (limited space) */
@media (max-width: 900px) {
    .discussion-indicator {
        right: 0;
        top: -24px;
        font-size: 0.7rem;
        padding: 2px 6px;
    }
}

/* Paragraph highlight when navigating from discussion */
.discussion-highlight {
    background: rgba(59, 130, 246, 0.15);
    border-radius: 4px;
    animation: discussHighlight 2s ease-out;
}

@keyframes discussHighlight {
    0% { background: rgba(59, 130, 246, 0.3); }
    100% { background: transparent; }
}

/* Discussion floating panel (inline, near paragraph) */
.discussion-floating-panel {
    position: absolute;
    width: 320px;
    max-height: 400px;
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    z-index: 300;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: panelSlideIn 0.2s ease-out;
}

/* Larger panel variant for inline replies */
.discussion-floating-panel-large {
    width: 400px;
    max-height: 500px;
}

@keyframes panelSlideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

.discussion-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
    font-weight: 600;
    color: var(--color-text);
    flex-shrink: 0;
}

.discussion-panel-header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.discussion-panel-share-thread-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 4px;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.discussion-panel-share-thread-btn:hover {
    border-color: #0077b5;
    color: #0077b5;
    background: rgba(0, 119, 181, 0.1);
}

.discussion-panel-all-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 0.7rem;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.discussion-panel-all-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.discussion-panel-all-btn.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.discussion-panel-location {
    font-size: 0.7rem;
    color: var(--color-accent);
    background: rgba(139, 92, 246, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

/* Paragraph highlight when navigating from All Threads */
.highlight-paragraph {
    animation: paragraphHighlight 2s ease-out;
}

@keyframes paragraphHighlight {
    0% { background-color: rgba(139, 92, 246, 0.3); }
    100% { background-color: transparent; }
}

.discussion-panel-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.discussion-panel-close:hover {
    color: var(--color-text);
}

/* Expand/minimize button */
.discussion-panel-expand-btn {
    background: none;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    padding: 4px;
    color: var(--color-text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.discussion-panel-expand-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.discussion-panel-expand-btn .minimize-icon {
    display: none;
}

.discussion-panel-expanded .discussion-panel-expand-btn .expand-icon {
    display: none;
}

.discussion-panel-expanded .discussion-panel-expand-btn .minimize-icon {
    display: block;
}

/* Expanded half-page view */
.discussion-floating-panel.discussion-panel-expanded {
    position: fixed !important;
    top: 0 !important;
    right: 0 !important;
    left: auto !important;
    bottom: 0;
    width: 50%;
    max-width: 600px;
    min-width: 400px;
    max-height: none;
    height: 100vh;
    border-radius: 0;
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.15);
    z-index: 300;
    animation: expandSlideIn 0.3s ease-out;
}

@keyframes expandSlideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.discussion-panel-expanded .discussion-panel-messages {
    max-height: none;
    flex: 1;
}

.discussion-panel-expanded .discussion-panel-header {
    padding: var(--spacing-md);
    font-size: 1.1rem;
}

.discussion-panel-expanded .discussion-panel-item {
    padding: var(--spacing-md);
}

.discussion-panel-expanded .discussion-panel-textarea {
    min-height: 80px;
}

/* Adapt layout when expanded panel is open - hide sidebar, shrink content */
body.discussion-panel-open .sidebar {
    display: none !important;
}

body.discussion-panel-open .layout {
    display: block;
}

body.discussion-panel-open .content {
    margin-left: auto;
    margin-right: min(50%, 600px);
    max-width: calc(100% - min(50%, 600px));
    padding: var(--spacing-lg);
    transition: all 0.3s ease-out;
}

/* Mobile: expanded takes full width, overlay mode */
@media (max-width: 900px) {
    .discussion-floating-panel.discussion-panel-expanded {
        width: 100%;
        max-width: none;
        min-width: auto;
    }

    body.discussion-panel-open .sidebar {
        display: none !important;
    }

    body.discussion-panel-open .content {
        margin-right: 0;
        max-width: 100%;
        padding: var(--spacing-md);
    }
}

/* Messages area (scrollable) */
.discussion-panel-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
    min-height: 150px;
    max-height: 300px;
    background: var(--color-bg);
}

.discussion-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
    max-height: 280px;
}

.discussion-panel-loading,
.discussion-panel-empty,
.discussion-panel-error {
    padding: var(--spacing-md);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.discussion-panel-item {
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

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

/* New message highlight animation */
.discussion-panel-item.new-message {
    animation: newMessagePulse 2s ease-out;
}

@keyframes newMessagePulse {
    0% { 
        background: rgba(37, 99, 235, 0.3);
        box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
    }
    50% { 
        background: rgba(37, 99, 235, 0.15);
        box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
    }
    100% { 
        background: var(--color-sidebar-bg);
        box-shadow: none;
    }
}

.discussion-panel-item-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.discussion-actions {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 2px;
}

.discussion-linkedin-btn,
.discussion-edit-btn,
.discussion-delete-btn {
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    opacity: 0.5;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.discussion-linkedin-btn:hover {
    opacity: 1;
    color: #0077b5;
    background: rgba(0, 119, 181, 0.1);
}

.discussion-edit-btn:hover {
    opacity: 1;
    color: var(--color-accent);
    background: rgba(139, 92, 246, 0.1);
}

.discussion-delete-btn:hover {
    opacity: 1;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.discussion-panel-user {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-accent);
}

.discussion-author-badge {
    font-size: 0.65rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, #8b5cf6, #6366f1);
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.discussion-panel-item.is-author {
    border-left: 3px solid var(--color-accent);
    background: rgba(139, 92, 246, 0.05);
}

.discussion-panel-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.discussion-panel-quote {
    font-style: italic;
    color: var(--color-text-muted);
    font-size: 0.8rem;
    margin-bottom: var(--spacing-xs);
    padding-left: var(--spacing-sm);
    border-left: 2px solid var(--color-accent);
}

.discussion-panel-text {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.5;
    white-space: pre-wrap;
}

/* Edit mode */
.discussion-edit-textarea {
    width: 100%;
    min-height: 80px;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--color-bg);
    color: var(--color-text);
    resize: vertical;
}

.discussion-edit-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
}

.discussion-edit-actions {
    display: flex;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-xs);
}

.discussion-save-btn,
.discussion-cancel-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.discussion-save-btn {
    background: var(--color-accent);
    color: white;
    box-shadow: 0 2px 4px rgba(139, 92, 246, 0.3);
}

.discussion-save-btn:hover {
    background: var(--color-accent-hover);
    box-shadow: 0 4px 8px rgba(139, 92, 246, 0.4);
}

.discussion-cancel-btn {
    background: var(--color-border);
    color: var(--color-text);
}

.discussion-cancel-btn:hover {
    background: var(--color-text-muted);
    color: var(--color-bg);
}

/* Reply section at bottom of panel */
.discussion-panel-reply {
    padding: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
    background: var(--color-sidebar-bg);
    flex-shrink: 0;
}

.discussion-panel-textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 0.875rem;
    resize: none;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.4;
}

.discussion-panel-textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 2px rgba(37, 99, 235, 0.1);
}

.discussion-panel-reply-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-xs);
}

.discussion-panel-char-count {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.discussion-panel-post-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.discussion-panel-post-btn:hover:not(:disabled) {
    background: #2563eb;
}

.discussion-panel-post-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Login prompt in panel */
.discussion-panel-login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
}

.discussion-panel-login-prompt span {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.discussion-panel-login-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.discussion-panel-login-btn:hover {
    background: #2563eb;
}

.discussion-panel-login-btn svg {
    fill: currentColor;
}

.discussion-panel-add {
    margin: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.discussion-panel-add:hover {
    background: #2563eb;
}

@media (max-width: 900px) {
    .discussion-floating-panel,
    .discussion-floating-panel-large {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-height: 70vh;
        border-radius: 16px 16px 0 0;
    }
}

/* Discussion list items */
.discuss-item {
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.discuss-item:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.discuss-item-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.discuss-item-user {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--color-text);
}

.discuss-item-date {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.discuss-item-quote {
    font-style: italic;
    color: var(--color-text-muted);
    padding: var(--spacing-sm);
    background: var(--color-code-bg);
    border-left: 3px solid var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-size: 0.85rem;
    line-height: 1.4;
    border-radius: 0 4px 4px 0;
}

.discuss-item-content {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    white-space: pre-wrap;
}

.discuss-item-meta {
    font-size: 0.75rem;
}

.discuss-item-meta .paragraph-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
}

.discuss-item-meta .paragraph-link:hover {
    text-decoration: underline;
}

.discuss-item-meta .chapter-badge {
    color: var(--color-text-muted);
}

/* Thread index (forum-style grouped discussions) */
.discuss-index-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-xs) 0;
    margin-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.discuss-thread {
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.discuss-thread:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.discuss-thread-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
}

.discuss-thread-preview {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.discuss-thread-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.7rem;
}

.discuss-thread-count {
    color: var(--color-accent);
    font-weight: 500;
}

.discuss-thread-time {
    color: var(--color-text-muted);
}

.discuss-thread-chapter {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
}

/* Discussion empty state */
.discuss-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    height: 100%;
}

.discuss-empty svg {
    color: var(--color-text-muted);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.discuss-empty h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.discuss-empty p {
    margin: 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    max-width: 280px;
    line-height: 1.5;
}

.discuss-loading {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

/* Discussion login prompt */
.discuss-login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl);
    height: 100%;
}

.discuss-login-prompt svg {
    color: var(--color-text-muted);
    opacity: 0.5;
    margin-bottom: var(--spacing-md);
}

.discuss-login-prompt h3 {
    margin: 0 0 var(--spacing-sm) 0;
    font-size: 1.1rem;
    color: var(--color-text);
}

.discuss-login-prompt p {
    margin: 0 0 var(--spacing-lg) 0;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.discuss-login-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-accent);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background var(--transition-fast);
}

.discuss-login-btn:hover {
    background: var(--color-accent-hover);
}

.discuss-login-btn svg {
    fill: white;
}

/* Discussion compose form */
.discuss-compose {
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--color-accent);
    background: var(--color-sidebar-bg);
}

.discuss-compose-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    font-size: 0.9rem;
}

.discuss-compose-cancel {
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0;
    width: 24px;
    height: 24px;
}

.discuss-compose-cancel:hover {
    color: var(--color-text);
}

.discuss-compose-quote {
    font-style: italic;
    color: var(--color-text-muted);
    padding: var(--spacing-sm);
    background: var(--color-code-bg);
    border-left: 3px solid var(--color-accent);
    margin-bottom: var(--spacing-sm);
    font-size: 0.85rem;
    line-height: 1.4;
    border-radius: 0 4px 4px 0;
}

.discuss-compose-hint {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-sm) 0;
}

#discuss-compose-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    resize: vertical;
    font-family: inherit;
    font-size: 0.9rem;
    line-height: 1.5;
    background: var(--color-bg);
    color: var(--color-text);
}

#discuss-compose-input:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.discuss-compose-actions {
    margin-top: var(--spacing-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.discuss-submit-btn {
    background: var(--color-accent);
    color: white;
    border: none;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.85rem;
    transition: background var(--transition-fast);
}

.discuss-submit-btn:hover:not(:disabled) {
    background: var(--color-accent-hover);
}

.discuss-submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Discuss list container - ensure proper stacking */
#discuss-list {
    display: flex;
    flex-direction: column;
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* Forum-style layout (messages on top, compose at bottom) */
.discuss-forum-layout {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 300px;
}

.discuss-conversation {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
}

.discuss-message {
    padding: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-sidebar-bg);
}

.discuss-message:last-child {
    margin-bottom: 0;
}

.discuss-message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.discuss-message-user {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--color-accent);
}

.discuss-message-date {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.discuss-message-quote {
    font-style: italic;
    color: var(--color-text-muted);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--color-code-bg);
    border-left: 2px solid var(--color-accent);
    margin-bottom: var(--spacing-xs);
    font-size: 0.8rem;
    line-height: 1.4;
    border-radius: 0 4px 4px 0;
}

.discuss-message-content {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text);
    white-space: pre-wrap;
}

.discuss-compose-bottom {
    padding: var(--spacing-sm);
    background: var(--color-sidebar-bg);
    border-top: 1px solid var(--color-border);
}

.discuss-compose-bottom .discuss-compose-quote {
    margin-bottom: var(--spacing-sm);
}

.discuss-empty,
.discuss-loading,
.discuss-error {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Discussions below compose form (legacy) */
.discuss-list-content {
    display: flex;
    flex-direction: column;
    margin-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    padding-top: var(--spacing-md);
}

/* Recent discussions below compose */
.discuss-list-header {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-sm) 0;
    margin-bottom: var(--spacing-xs);
}

.discuss-item-mini {
    padding: var(--spacing-sm);
    font-size: 0.85rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.discuss-item-mini:hover {
    border-color: var(--color-accent);
}

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

.discuss-item-mini-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.discuss-item-mini .discuss-item-user {
    font-weight: 500;
    font-size: 0.8rem;
    color: var(--color-text);
}

.discuss-item-mini .discuss-item-date {
    font-size: 0.7rem;
    color: var(--color-text-muted);
}

.discuss-item-mini-quote {
    font-style: italic;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    padding-left: var(--spacing-xs);
    border-left: 2px solid var(--color-border);
    margin-bottom: 4px;
    line-height: 1.3;
}

.discuss-item-mini-content {
    color: var(--color-text);
    line-height: 1.4;
}

.discuss-item-mini-meta {
    font-size: 0.7rem;
    color: var(--color-accent);
    margin-top: 4px;
}

.community-item {
    background: var(--color-sidebar-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.community-item:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.community-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xs);
}

.community-item-user {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.community-item-date {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
}

.community-item-question {
    font-size: 0.875rem;
    color: var(--color-text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.community-item-meta {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
    font-size: 0.6875rem;
    color: var(--color-text-muted);
}

.community-item-meta .chapter-link {
    color: var(--color-accent);
    text-decoration: none;
    padding: 2px 6px;
    background: rgba(139, 92, 246, 0.1);
    border-radius: 4px;
    transition: background var(--transition-fast);
}

.community-item-meta .chapter-link:hover {
    background: rgba(139, 92, 246, 0.2);
    text-decoration: underline;
}

.community-item-meta .freeform-badge {
    padding: 2px 6px;
    background: var(--color-bg);
    border-radius: 4px;
    color: var(--color-text-muted);
}

/* Community and News share buttons */
.community-share-btn,
.news-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    background: transparent;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    color: var(--color-text-muted);
    opacity: 0.6;
    transition: all var(--transition-fast);
    margin-left: auto;
}

.community-share-btn:hover,
.news-share-btn:hover {
    color: #0077b5;
    opacity: 1;
    background: rgba(0, 119, 181, 0.1);
}

/* Community thread view */
.community-thread {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.community-thread-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.community-back-btn {
    background: none;
    border: none;
    padding: 4px;
    cursor: pointer;
    color: var(--color-text-muted);
    border-radius: 4px;
    display: flex;
    align-items: center;
}

.community-back-btn:hover {
    color: var(--color-text);
    background: var(--color-border);
}

.community-thread-title {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    flex: 1;
}

.community-thread-share-btn {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--color-text-muted);
    border-radius: 4px;
    display: flex;
    align-items: center;
    transition: all var(--transition-fast);
}

.community-thread-share-btn:hover {
    color: #0077b5;
    background: rgba(0, 119, 181, 0.1);
}

/* Message header with timestamp */
.chat-message-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.message-role {
    font-size: 0.6875rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.message-time {
    font-size: 0.625rem;
    color: var(--color-text-muted);
}

/* News Panel */
.news-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.news-loading,
.news-empty {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-align: center;
    padding: var(--spacing-xl);
}

.news-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.news-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.news-updated {
    font-size: 0.6875rem;
    color: var(--color-text-muted);
}

.news-items {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.news-item {
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.news-item-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.news-item-summary {
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    line-height: 1.5;
    margin-bottom: var(--spacing-sm);
}

.news-item-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.6875rem;
    color: var(--color-text-muted);
}

.news-item-source {
    font-weight: 500;
}

.news-item-link {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    color: var(--color-accent);
    text-decoration: none;
    margin-left: auto;
}

.news-item-link:hover {
    text-decoration: underline;
}

.news-refresh-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.news-refresh-btn:hover {
    background: var(--color-border);
    color: var(--color-text);
}

/* Hide the old Ask AI button */
.chat-toggle {
    display: none !important;
}

/* Subtle tab on right edge (shows when sidebar hidden) */
.chat-tab {
    position: fixed;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: 8px 0 0 8px;
    padding: 12px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    z-index: 300;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    letter-spacing: 0.05em;
    transition: padding var(--transition-fast), background var(--transition-fast);
    opacity: 0;
    pointer-events: none;
}

.chat-tab:hover {
    padding: 12px 12px;
    background: var(--color-accent-hover);
}

/* Show tab when sidebar is closed */
.chat-tab.visible {
    opacity: 1;
    pointer-events: auto;
}

/* Chat Messages Area */
.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.chat-welcome {
    background: var(--color-sidebar-bg);
    padding: var(--spacing-md);
    border-radius: 8px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.5;
}

.chat-welcome p {
    margin: 0 0 var(--spacing-md) 0;
}

/* Suggested Questions */
.suggested-questions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.suggested-question {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.8125rem;
    color: var(--color-text);
    text-align: left;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast);
    line-height: 1.4;
}

.suggested-question:hover {
    border-color: var(--color-accent);
    background: var(--chat-assistant-bubble);
}

/* Attribution badges */
.chat-attribution {
    margin-bottom: var(--spacing-xs);
}

.attr-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 0.6875rem;
    padding: 3px 10px;
    border-radius: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.attr-badge svg {
    flex-shrink: 0;
}

.attr-badge.book {
    background: rgba(37, 99, 235, 0.1);
    color: var(--color-accent);
}

.attr-badge.external {
    background: rgba(234, 179, 8, 0.15);
    color: #b45309;
}

.attr-badge.pregenerated {
    background: rgba(16, 185, 129, 0.12);
    color: #059669;
}

[data-theme="dark"] .attr-badge.book {
    background: rgba(96, 165, 250, 0.15);
    color: #93c5fd;
}

[data-theme="dark"] .attr-badge.external {
    background: rgba(234, 179, 8, 0.2);
    color: #fcd34d;
}

[data-theme="dark"] .attr-badge.pregenerated {
    background: rgba(16, 185, 129, 0.2);
    color: #6ee7b7;
}

/* Citation links in chat */
.citation-link {
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.85em;
}

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

/* Login prompt */
.chat-login-prompt {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
}

.chat-login-prompt .login-icon {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
}

.chat-login-prompt h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--color-text);
}

.chat-login-prompt p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.5;
}

.chat-login-prompt .login-hint {
    font-size: 0.75rem;
    margin-bottom: var(--spacing-lg);
}

.login-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text);
    cursor: pointer;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-btn:hover {
    border-color: var(--color-accent);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* User greeting */
.user-greeting {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.user-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
}

.logout-btn {
    margin-left: auto;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
    transition: color var(--transition-fast), background var(--transition-fast);
}

.logout-btn:hover {
    color: var(--color-text);
    background: var(--color-border);
}

/* Chat Messages */
.chat-message {
    display: flex;
    flex-direction: column;
    max-width: 85%;
}

.chat-message.user {
    align-self: flex-end;
}

/* Highlighted user question (pre-generated answer match) */
.chat-message.user.highlighted {
    background: rgba(16, 185, 129, 0.08);
    border-left: 3px solid #10b981;
    padding-left: 12px;
    margin-left: -12px;
    border-radius: 8px;
    animation: questionPulse 2s ease-out;
}

.chat-message.user.highlighted::before {
    content: 'Your question:';
    display: block;
    font-size: 0.7rem;
    color: #10b981;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

@keyframes questionPulse {
    0%, 100% {
        background: rgba(16, 185, 129, 0.08);
    }
    15%, 45% {
        background: rgba(16, 185, 129, 0.2);
    }
    30% {
        background: rgba(16, 185, 129, 0.25);
    }
}

[data-theme="dark"] .chat-message.user.highlighted {
    background: rgba(16, 185, 129, 0.12);
    border-left-color: #34d399;
}

[data-theme="dark"] .chat-message.user.highlighted::before {
    color: #34d399;
}

.chat-message.assistant {
    align-self: flex-start;
}

.chat-message-content {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: 12px;
    font-size: 0.875rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-message.user .chat-message-content {
    background: var(--chat-user-bubble);
    color: var(--chat-user-text);
    border-bottom-right-radius: 4px;
}

.chat-message.assistant .chat-message-content {
    background: var(--chat-assistant-bubble);
    color: var(--chat-assistant-text);
    border-bottom-left-radius: 4px;
}

.chat-message.assistant .chat-message-content code {
    background: var(--color-code-bg);
    padding: 0.1em 0.3em;
    border-radius: 3px;
    font-size: 0.85em;
}

.chat-message.error .chat-message-content {
    background: #fef2f2;
    color: #dc2626;
    border: 1px solid #fecaca;
}

[data-theme="dark"] .chat-message.error .chat-message-content {
    background: #450a0a;
    color: #fca5a5;
    border-color: #7f1d1d;
}

/* Chat Share Button */
.chat-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--spacing-xs);
    padding-top: var(--spacing-xs);
    border-top: 1px solid var(--color-border);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.chat-message:hover .chat-actions {
    opacity: 1;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.share-btn:hover {
    color: #0077b5;
    border-color: #0077b5;
    background: rgba(0, 119, 181, 0.1);
}

.share-btn svg {
    color: #0077b5;
}

/* Chat Input Area */
.chat-input-container {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    border-top: 1px solid var(--color-border);
    background: var(--color-sidebar-bg);
}

.chat-input-options {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.web-search-toggle {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    cursor: pointer;
    user-select: none;
}

.web-search-toggle input[type="checkbox"] {
    width: 14px;
    height: 14px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--color-accent);
}

.web-search-toggle:hover {
    color: var(--color-text);
}

.web-search-toggle svg {
    flex-shrink: 0;
}

.web-search-toggle input:checked ~ svg {
    color: var(--color-accent);
}

.web-search-toggle input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.web-search-toggle:has(input:disabled) {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-input-row {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-sm);
}

.chat-input {
    flex: 1;
    resize: none;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: var(--spacing-sm) var(--spacing-md);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    line-height: 1.5;
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 40px;
    max-height: 120px;
    transition: border-color var(--transition-fast);
}

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

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

.chat-send,
.chat-stop {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 8px;
    background: var(--color-accent);
    color: #ffffff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast), opacity var(--transition-fast);
}

.chat-send:hover:not(:disabled),
.chat-stop:hover {
    background: var(--color-accent-hover);
}

.chat-send:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.chat-stop {
    background: #dc2626;
}

.chat-stop:hover {
    background: #b91c1c;
}

.chat-send svg,
.chat-stop svg {
    width: 18px;
    height: 18px;
}

/* Chat Status */
.chat-status {
    padding: 0 var(--spacing-md) var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    min-height: 1.5em;
}

.chat-status.error {
    color: #dc2626;
}

.chat-status.info {
    color: var(--color-accent);
}

/* Loading animation */
.chat-loading span {
    animation: blink 1.4s infinite;
}

.chat-loading span:nth-child(2) {
    animation-delay: 0.2s;
}

.chat-loading span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes blink {
    0%, 80%, 100% { opacity: 0.3; }
    40% { opacity: 1; }
}

/* Mobile Chat Bar */
.chat-mobile-bar {
    display: none;
}

/* Mobile Styles */
@media (max-width: 900px) {
    /* Hide desktop toggle on mobile */
    .chat-toggle {
        display: none;
    }

    /* Show mobile bar */
    .chat-mobile-bar {
        display: block;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: var(--color-sidebar-bg);
        border-top: 1px solid var(--color-border);
        padding: var(--spacing-sm) var(--spacing-md);
        z-index: 200;
    }

    .chat-mobile-trigger {
        width: 100%;
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        padding: var(--spacing-sm) var(--spacing-md);
        background: var(--color-bg);
        border: 1px solid var(--color-border);
        border-radius: 8px;
        color: var(--color-text-muted);
        font-size: 0.875rem;
        cursor: pointer;
        transition: border-color var(--transition-fast);
    }

    .chat-mobile-trigger:hover {
        border-color: var(--color-accent);
    }

    .chat-mobile-trigger svg {
        width: 20px;
        height: 20px;
        flex-shrink: 0;
    }

    /* Chat sidebar becomes bottom panel on mobile */
    .chat-sidebar {
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 65vh;
        border-left: none;
        border-top: 1px solid var(--color-border);
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
    }

    .chat-sidebar.open {
        transform: translateY(0);
    }

    /* Hide mobile bar when chat is open */
    .chat-sidebar.open ~ .chat-mobile-bar {
        display: none;
    }

    /* Add padding to content for mobile bar */
    .content {
        padding-bottom: 70px;
    }

    /* No margin adjustment on mobile */
    .layout.chat-open .content {
        margin-right: 0;
    }
}

/* Chat overlay for mobile */
.chat-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 240;
}

@media (max-width: 900px) {
    .chat-overlay.active {
        display: block;
    }
}