/**
 * PolicyBox Reader styles — part 2/7: Header, conversation area, nodes, input area, welcome message, citations panel.
 * Split from reader.css (2026-06). Load order matters (cascade);
 * link tags in layouts/policy_reader.html preserve the original order.
 */

/* ===========================
   Header - Collapsible Academic Style
   =========================== */

.reader-header {
    background: var(--color-bg-secondary);
    border-bottom: 2px solid var(--color-border);
    padding: 0.75rem 1rem;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
}

.reader-header.collapsed {
    padding: 0.375rem 1rem;
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-normal);
}

.header-left {
    flex: 1;
    min-width: 0;
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.reader-header.collapsed .header-left {
    opacity: 0;
    transform: translateY(-10px);
    pointer-events: none;
}

.document-category {
    font-family: var(--font-sans);
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    margin-bottom: 0.125rem;
    transition: all var(--transition-normal);
}

.reader-header.collapsed .document-category {
    font-size: 0;
    margin-bottom: 0;
}

.document-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--color-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    transition: all var(--transition-normal);
}

.reader-header.collapsed .document-title {
    font-size: 0.8125rem;
}

.document-meta {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    color: var(--color-text-secondary);
    margin-top: 0.125rem;
    transition: all var(--transition-normal);
}

.reader-header.collapsed .document-meta {
    font-size: 0;
    margin-top: 0;
}

/* Header actions */
.header-right,
.header-left,
.header-center {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header-right {
    transition: all var(--transition-normal);
    align-items: stretch; /* Make all buttons same height */
}

.reader-header.collapsed .header-right {
    gap: 0.375rem;
}

/* Collapse toggle button */
.collapse-toggle {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

.collapse-toggle:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-accent);
    color: var(--color-text-primary);
}

.collapse-icon {
    transition: transform var(--transition-normal);
    display: inline-block;
}

.reader-header.collapsed .collapse-icon {
    transform: rotate(180deg);
}

/* Collapsed header minimized info */
.header-collapsed-info {
    display: none;
    font-family: var(--font-sans);
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
    margin-right: 1rem;
}

.reader-header.collapsed .header-collapsed-info {
    display: block;
}

/* Header buttons */
.header-btn {
    padding: 0.375rem 0.75rem;
    border: 1px solid var(--color-border);
    background: transparent;
    color: var(--color-text-secondary);
    border-radius: 4px;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
    font-size: 0.75rem;
    font-weight: 500;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.reader-header.collapsed .header-btn {
    padding: 0.25rem 0.5rem;
    font-size: 0.6875rem;
}

.header-btn:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-accent);
    color: var(--color-text-primary);
}

.header-btn:active {
    transform: translateY(1px);
}

/* Labeled header buttons (Language, Listen) */
.header-btn--labeled {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.375rem 0.625rem;
    border-radius: 6px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
}

.header-btn--labeled .btn-icon {
    font-size: 0.875rem;
}

.header-btn--labeled .btn-label {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--color-text-primary);
}

.header-btn--labeled .btn-caret {
    font-size: 0.625rem;
    opacity: 0.6;
    margin-left: 0.125rem;
}

/* Feature highlight button (Listen) */
.header-btn--feature {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: white;
}

.header-btn--feature .btn-label {
    color: white;
}

.header-btn--feature:hover {
    background: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
}

/* Language dropdown */
.header-dropdown {
    position: relative;
    display: flex;
}

.header-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.25rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 140px;
    z-index: 1000;
    overflow: hidden;
}

.header-dropdown.open .header-dropdown-menu {
    display: block;
}

.header-dropdown-menu button {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.875rem;
    font-family: var(--font-sans);
    color: var(--color-text-primary);
    transition: background 0.15s ease;
}

.header-dropdown-menu button:hover {
    background: var(--color-bg-tertiary);
}

.header-dropdown-menu button[aria-selected="true"] {
    background: var(--color-bg-tertiary);
    font-weight: 600;
}

.language-note--dropdown {
    padding: 0.375rem 0.75rem;
    margin: 0;
    font-size: 0.7rem;
    font-style: italic;
    color: var(--color-text-tertiary);
    border-bottom: 1px solid var(--color-border);
}

/* Audio dropdown menu */
.audio-dropdown-menu {
    min-width: 240px;
    padding: 0.5rem;
}

.audio-menu-item {
    display: flex !important;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem !important;
    border-radius: 8px;
    margin-bottom: 0.25rem;
}

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

.audio-menu-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.audio-menu-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
    text-align: left;
}

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

.audio-menu-desc {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
}

.audio-menu-toggle {
    font-size: 0.6875rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.audio-menu-toggle.active {
    background: var(--color-accent);
    color: #fff;
}

.audio-menu-arrow {
    font-size: 1rem;
    color: var(--color-text-tertiary);
}

/* Listen button playing state */
.header-btn--listening {
    animation: listen-pulse 1.5s infinite;
}

@keyframes listen-pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(139, 115, 85, 0.4); }
    50% { box-shadow: 0 0 0 6px rgba(139, 115, 85, 0); }
}

/* Mobile: hide labels, keep icons */
@media (max-width: 768px) {
    .header-btn--labeled .btn-label,
    .header-btn--labeled .btn-caret {
        display: none;
    }

    .header-btn--labeled {
        padding: 0.375rem 0.5rem;
    }

    .header-dropdown-menu {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        border-radius: 16px 16px 0 0;
        min-width: 100%;
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .header-dropdown-menu button {
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }

    /* Bump header z-index when dropdown is open so bottom sheet clears input area */
    .reader-header.dropdown-open {
        z-index: 200;
    }
}

/* Mobile bottom sheet backdrop (appended to body via JS) */
.header-dropdown-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 150;
}


/* ===========================
   Main Conversation Area
   =========================== */

.reader-main {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-lg) var(--spacing-md);
    padding-top: 20px; /* Tight spacing below header */
    padding-bottom: 16rem; /* Increased to accommodate fixed input area height */
    max-width: 1000px;
    margin: 0 auto;
    width: 100%;
    /* Smooth scrolling */
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

.conversation-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}


/* ===========================
   Conversation Nodes - Conversational Style
   =========================== */

.conversation-node {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0.75rem 0;
    position: relative;
    animation: fadeInMessage 0.3s ease;
}

.conversation-node:hover {
    /* No hover effect for conversational style */
}

.conversation-node::before {
    /* Remove the left border indicator */
    display: none;
}

.conversation-node.user-question-node {
    /* User questions slightly indented */
    padding-left: 1rem;
    border-left: 2px solid var(--color-accent);
    background: var(--color-bg-tertiary);
    padding: 0.875rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

@keyframes fadeInMessage {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: fixed;
    bottom: 45%;
    right: 1.5rem;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--color-accent-500, #9B4444);
    border: 2px solid var(--color-accent-600, #7D3636);
    box-shadow: 0 2px 10px rgba(155, 68, 68, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 101;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.2s ease;
    animation: scrollBounce 2s ease-in-out infinite;
}

.scroll-indicator--visible {
    opacity: 0.85;
    pointer-events: auto;
}

.scroll-indicator--visible:hover {
    opacity: 1;
}

.scroll-indicator svg {
    color: white;
}

.scroll-indicator:hover {
    background: var(--color-accent-600, #7D3636);
    border-color: var(--color-accent-700, #632B2B);
    transform: scale(1.1);
}

.scroll-indicator:hover svg {
    color: white;
}

@keyframes scrollBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(5px); }
}

.node-header {
    /* Hide the node header for conversational flow */
    display: none;
}

.node-icon {
    /* Hidden with node-header */
    display: none;
}

.node-meta {
    /* Hidden with node-header */
    display: none;
}

.node-type {
    /* Hidden with node-header */
    display: none;
}

.node-speaker {
    /* Hidden with node-header */
    display: none;
}

.node-content {
    font-size: var(--text-size-node, 0.9375rem);
    line-height: 1.7;
    color: var(--color-text-primary);
}

.node-content p {
    margin-bottom: var(--spacing-md);
}

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

/* Collapse empty paragraphs */
.node-content p:empty {
    margin: 0;
    display: none;
}

/* Tighter hr spacing */
.node-content hr {
    margin: 0.75rem 0;
}

.node-content strong {
    font-weight: 700;
    color: var(--color-text-primary);
}

.node-content em {
    font-style: italic;
}

.node-content ul,
.node-content ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

/* Constrained headings within node content - smaller than global defaults */
.node-content h1 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 1rem 0 0.5rem 0;
    color: var(--color-text-primary);
}

.node-content h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0.875rem 0 0.375rem 0;
    color: var(--color-text-primary);
}

/* No top margin on first h2 in content */
.node-content h2:first-child {
    margin-top: 0;
}

.node-content h3 {
    font-size: 0.9375rem;
    font-weight: 600;
    margin: 0.75rem 0 0.25rem 0;
    color: var(--color-text-secondary);
}

/* Subtle inline code styling */
.node-content code {
    font-family: var(--font-mono, 'SF Mono', 'Consolas', monospace);
    font-size: 0.875em;
    background: var(--color-bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    color: var(--color-text-primary);
}

/* Clickable inline citations */
.node-content .inline-citation {
    color: var(--color-accent);
    font-size: 0.875em;
    cursor: pointer;
    text-decoration: none;
    /* CRITICAL: Ensure citations are selectable as part of surrounding text */
    -webkit-user-select: text;
    -moz-user-select: text;
    -ms-user-select: text;
    user-select: text;
}

.node-content .inline-citation:hover {
    text-decoration: underline;
}

.node-badges {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.node-badge {
    padding: 0.25rem 0.625rem;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-family: var(--font-sans);
}

.node-badge.critical {
    background: #fff3cd;
    border-color: #ffc107;
    color: #856404;
}

/* Citations - Academic Footnote Style */
.node-citations {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
}

.citations-label {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.citation-item {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    font-family: var(--font-sans);
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--color-text-secondary);
}

.citation-number {
    position: absolute;
    left: 0;
    top: 0;
    font-weight: 700;
    color: var(--color-accent);
}

.citation-ref {
    font-size: 0.8125rem;
    color: var(--color-accent);
    cursor: pointer;
    padding: 0.125rem 0.375rem;
    border-radius: 3px;
    transition: background var(--transition-fast);
    font-family: var(--font-sans);
    font-weight: 600;
}

.citation-ref:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}


/* ===========================
   Input Area - Compact Academic Form
   =========================== */

.reader-input {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 0.5rem 0.75rem;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.05);
    z-index: 100;
    min-height: 3.5rem;
}

.input-container {
    max-width: 1000px;
    margin: 0 auto;
}

/* Processing indicator (shown while waiting for response)
   display is toggled between 'none' and 'flex' by JS inline styles */
.processing-indicator {
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem;
    max-width: 1000px;
    margin: 0 auto;
}

.processing-spinner .spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--bb-border, var(--color-border, #d4c5b9));
    border-top-color: var(--bb-primary, var(--color-accent, #8b7355));
    border-radius: 50%;
    animation: processingSpinner 0.8s linear infinite;
}

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

.processing-text {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin: 0;
}

.processing-label {
    font-weight: 600;
}

.processing-divider {
    margin: 0 0.25rem;
    opacity: 0.5;
}

.processing-phrase {
    font-style: italic;
    transition: opacity 0.15s ease;
}

.processing-phrase.phrase-changing {
    opacity: 0;
}

.ellipsis-animation {
    display: inline-block;
    width: 1.5em;
    text-align: left;
}

/* Text input container for open questions */
.text-input-container {
    display: flex;
    gap: 0.5rem;
    align-items: flex-end;
}

/* Auto-growing textarea for user input */
.user-input-field {
    flex: 1;
    min-height: 44px;
    max-height: 200px;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--color-border, #e5e7eb);
    border-radius: 12px;
    font-size: 0.9375rem;
    font-family: var(--font-body, inherit);
    line-height: 1.5;
    resize: none;
    overflow-y: auto;
    background: var(--color-bg-primary, #ffffff);
    color: var(--color-text-primary, #1f2937);
    transition: border-color 0.15s, box-shadow 0.15s;
}

.user-input-field:focus {
    outline: none;
    border-color: var(--accent-color, #2563eb);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.user-input-field::placeholder {
    color: var(--color-text-tertiary, #9ca3af);
}

/* Send button */
.send-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    background: var(--accent-color, #2563eb);
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    flex-shrink: 0;
    transition: background-color 0.15s, transform 0.1s;
}

.send-btn:hover {
    background: var(--accent-hover, #1d4ed8);
}

.send-btn:active {
    transform: scale(0.95);
}

.send-btn svg {
    width: 20px;
    height: 20px;
}

/* Dark theme support */
[data-theme="dark"] .user-input-field {
    background: var(--color-bg-secondary, #1f2937);
    border-color: var(--color-border, #374151);
    color: var(--color-text-primary, #f9fafb);
}

[data-theme="dark"] .user-input-field:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Sepia theme support */
[data-theme="sepia"] .user-input-field {
    background: #faf7f0;
    border-color: #d6c9b5;
    color: #5c4a32;
}

[data-theme="sepia"] .send-btn {
    background: #8b5a2b;
}

[data-theme="sepia"] .send-btn:hover {
    background: #704821;
}

/* Compact form layout - single row with inline elements */
.question-form.question-form--compact {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.input-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-top: 8px;
}

.input-actions {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.input-hint {
    font-family: var(--font-sans);
    font-size: 0.625rem;
    color: var(--color-text-tertiary);
    text-align: center;
    opacity: 0.7;
}

.input-disclosure {
    font-family: var(--font-sans);
    font-size: 0.5625rem;
    font-style: italic;
    color: var(--color-text-tertiary);
    text-align: center;
    margin: 4px 0 0;
    opacity: 0.6;
}

.input-disclosure a {
    color: var(--color-text-tertiary);
    text-decoration: underline;
}

.input-disclosure a:hover {
    color: var(--color-accent);
}

/* Legacy form styles (keep for backwards compatibility) */
.question-form:not(.question-form--compact) {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.form-label {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Compact textarea - single line by default, grows on focus */
.question-input.question-input--compact {
    flex: 1;
    min-width: 0;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 20px;
    font-size: 0.875rem;
    font-family: var(--font-body);
    resize: none;
    transition: all var(--transition-fast);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    line-height: 1.4;
    max-height: 120px;
    overflow-y: auto;
}

.question-input.question-input--compact:focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg-secondary);
    box-shadow: 0 0 0 2px rgba(139, 115, 85, 0.1);
}

/* Legacy textarea styles */
.question-input:not(.question-input--compact) {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1.5px solid var(--color-border);
    border-radius: 4px;
    font-size: 0.9375rem;
    font-family: var(--font-body);
    resize: none;
    transition: all var(--transition-fast);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
    line-height: 1.5;
}

.question-input:not(.question-input--compact):focus {
    outline: none;
    border-color: var(--color-accent);
    background: var(--color-bg-secondary);
    box-shadow: 0 0 0 3px rgba(139, 115, 85, 0.1);
}

.question-input::placeholder {
    color: var(--color-text-tertiary);
    font-style: italic;
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* Icon-only button variant */
.action-btn.action-btn--icon {
    padding: 0.4rem;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.action-btn.action-btn--subtle {
    border-color: transparent;
    background: transparent;
    opacity: 0.6;
}

.action-btn.action-btn--subtle:hover {
    opacity: 1;
    border-color: transparent;
    background: var(--color-bg-tertiary);
}

/* Legacy action button */
.action-btn:not(.action-btn--icon) {
    padding: 0.625rem 1rem;
    border: 1.5px solid var(--color-border);
    background: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

.action-btn:not(.action-btn--icon):hover {
    border-color: var(--color-accent);
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

/* Compact submit button */
.submit-btn.submit-btn--compact {
    padding: 0.4rem;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--color-accent);
    color: white;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.submit-btn.submit-btn--compact:hover:not(:disabled) {
    background: var(--color-accent-hover);
    transform: scale(1.05);
}

.submit-btn.submit-btn--compact:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

/* Legacy submit button */
.submit-btn:not(.submit-btn--compact) {
    padding: 0.625rem 1rem;
    background: var(--color-accent);
    color: white;
    border: 1.5px solid var(--color-accent);
    border-radius: 4px;
    font-size: 0.8125rem;
    font-weight: 700;
    cursor: pointer;
    transition: all var(--transition-fast);
    font-family: var(--font-sans);
}

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

.submit-btn:not(.submit-btn--compact):disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.char-counter {
    font-family: var(--font-sans);
    font-size: 0.6875rem;
    color: var(--color-text-tertiary);
}


/* ===========================
   Welcome Message - Enhanced Academic Style
   =========================== */

.welcome-node {
    background: var(--color-bg-secondary);
    border: 1.5px solid var(--color-border);
    border-radius: 8px;
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    animation: fadeInWelcome 0.5s ease;
}

@keyframes fadeInWelcome {
    from {
        opacity: 0;
        transform: translateY(15px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-ornament {
    font-size: 1.5rem;
    color: var(--color-border);
    margin-bottom: 0.75rem;
}

.welcome-node h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 0.5rem;
}

.welcome-node p {
    font-family: var(--font-sans);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
}

/* Constrained styling for welcome and response content */
/* Keep text inline and simple - no block-level transformations */
.conversation-node.welcome-node .node-content,
.conversation-node[data-node-id="welcome"] .node-content {
    line-height: 1.6;
}

/* Bold stays inline, just slightly emphasized */
.conversation-node.welcome-node .node-content strong,
.conversation-node[data-node-id="welcome"] .node-content strong {
    font-weight: 600;
    color: var(--color-text-primary);
}

/* Italic stays inline */
.conversation-node.welcome-node .node-content em,
.conversation-node[data-node-id="welcome"] .node-content em {
    font-style: italic;
    color: var(--color-text-secondary);
}

/* Standard list styling */
.conversation-node.welcome-node .node-content ul,
.conversation-node[data-node-id="welcome"] .node-content ul {
    list-style: disc;
    padding-left: 1.25rem;
    margin: 0.5rem 0;
}

.conversation-node.welcome-node .node-content li,
.conversation-node[data-node-id="welcome"] .node-content li {
    padding: 0.25rem 0;
    color: var(--color-text-primary);
}


/* ===========================
   Citations Panel
   =========================== */

.citations-panel {
    position: fixed;
    right: 0;
    top: var(--header-height);
    bottom: 0;
    width: 400px;
    max-width: 90vw;
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    box-shadow: -2px 0 8px rgba(0, 0, 0, 0.1);
    z-index: 200;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    overflow-y: auto;
}

.citations-panel.open {
    transform: translateX(0);
}

.panel-header {
    position: sticky;
    top: 0;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-sans);
}

.panel-close {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--color-text-primary);
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition-fast);
}

.panel-close:hover {
    background: var(--color-bg-tertiary);
}

.panel-content {
    padding: var(--spacing-md);
}

.panel-empty {
    text-align: center;
    color: var(--color-text-secondary);
    padding: var(--spacing-lg);
    font-family: var(--font-sans);
    font-size: 0.875rem;
}