/* ==========================================================================
           [SEC:CSS:CHAT]
           5. CHAT WINDOW STYLING
           ========================================================================== */
        #chat-window {
            display: flex;
            flex-direction: column;
        }

        /* Vertical Mode Adjustment: Push top bubble down to prevent overlap with the header */
        body.layout-vertical #chat-window {
            padding-top: 4rem;
        }

        /* Scroll to Bottom Button */
        #scroll-to-bottom-btn {
            position: absolute;
            bottom: 1rem;
            right: 1.5rem;
            z-index: 50;
            transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
            pointer-events: none;
            /* Only enable when visible */
            opacity: 0;
            transform: translateY(1rem);
        }

        #scroll-to-bottom-btn:hover {
            transform: translateY(0) scale(1.1);
            background-color: rgba(31, 41, 55, 0.8);
            border-color: rgba(99, 102, 241, 0.5);
        }

        #scroll-to-bottom-btn:active {
            transform: scale(0.95);
        }

        #scroll-to-bottom-btn.visible {
            display: flex !important;
            opacity: 0.7 !important;
            transform: translateY(0);
            pointer-events: auto;
        }

        #scroll-to-bottom-btn.visible:hover {
            opacity: 1 !important;
            transform: scale(1.1);
        }

        /* Markdown Styles */
        /* Markdown Styles: Controlled via CSS Variables for theming support */
        #chat-window h1 {
            color: var(--md-h1-color, #818cf8);
            font-family: var(--md-h1-font, var(--chat-font-family));
            font-size: 1.5em;
            font-weight: 700;
            margin: 0.5em 0;
        }

        #chat-window h2 {
            color: var(--md-h2-color, #a5b4fc);
            font-family: var(--md-h2-font, var(--chat-font-family));
            font-size: 1.25em;
            font-weight: 600;
            margin: 0.4em 0;
        }

        #chat-window h3 {
            color: var(--md-h3-color, #c7d2fe);
            font-family: var(--md-h3-font, var(--chat-font-family));
            font-size: 1.1em;
            font-weight: 600;
            margin: 0.3em 0;
        }

        /* Bold Text: Uses the CSS variable for dynamic coloring */
        #chat-window strong {
            color: var(--md-bold-color, #ffffff);
            font-family: var(--md-bold-font, var(--chat-font-family));
            font-weight: 700;
        }

        #chat-window em {
            color: var(--md-italic-color, #9ca3af);
            font-family: var(--md-italic-font, var(--chat-font-family));
        }

        #chat-window blockquote {
            border-left: 3px solid var(--brand-color);
            padding-left: 1rem;
            color: var(--md-quote-color, #9ca3af);
            font-family: var(--md-quote-font, var(--chat-font-family));
            font-style: italic;
        }

        /* Smart Quotation Formatting 
           Uses dynamic variables to toggle between the default "Filtered" look 
           and a specific "User Color" look. */
        .dialogue-quote {
            color: var(--active-quote-color, inherit);
            filter: var(--active-quote-filter, saturate(175%) opacity(75%) drop-shadow(1px 1px 5px black));
            font-family: var(--md-quote-font, inherit);
            font-weight: 500;
        }

        /* =============================================
           CURRENT SCENARIO BANNER
           Inline introductory card for the "Current Scenario" static entry.
           Displayed before the first chat message as an atmospheric scene-setter.
           ============================================= */

        /* Divider separating scenario text from the player character chip */
        .scenario-banner-divider {
            width: 100%;
            height: 1px;
            background: linear-gradient(to right, transparent, rgba(139, 92, 246, 0.3), transparent);
            margin: 1.25rem 0;
        }

        /* Player character chip: square portrait + name + description */
        .scenario-banner-player {
            display: flex;
            align-items: center;
            gap: 0.875rem;
            width: 100%;
            text-align: left;
            animation: scenarioBannerFadeIn 1.1s ease both;
        }

        .scenario-banner-player-avatar {
            flex-shrink: 0;
            width: 6.5rem;
            height: 6.5rem;
            border-radius: 0.5rem;
            background-color: rgba(99, 102, 241, 0.15);
            background-size: cover;
            background-position: center top;
            border: 1px solid rgba(139, 92, 246, 0.35);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        /* Silhouette icon shown when no portrait image is available */
        .scenario-banner-player-avatar svg {
            width: 60%;
            height: 60%;
            color: rgba(139, 92, 246, 0.5);
        }

        .scenario-banner-player-info {
            display: flex;
            flex-direction: column;
            gap: 0.2rem;
            min-width: 0;
        }

        .scenario-banner-player-role {
            font-size: 0.6rem;
            font-weight: 700;
            letter-spacing: 0.15em;
            text-transform: uppercase;
            color: rgba(167, 139, 250, 0.6);
        }

        .scenario-banner-player-name {
            font-size: 0.95rem;
            font-weight: 600;
            font-style: normal;
            color: rgba(221, 214, 254, 0.95);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .scenario-banner-player-desc {
            font-size: 0.8rem;
            font-style: italic;
            color: rgba(156, 163, 175, 0.85);
            white-space: normal;
            line-height: 1.5;
        }

        .scenario-banner-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            margin: 1.5rem auto 2rem;
            padding: 1.75rem 2rem;
            max-width: 680px;
            width: calc(100% - 2rem);
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.07) 0%, rgba(139, 92, 246, 0.09) 100%);
            border: 1px solid rgba(139, 92, 246, 0.3);
            border-radius: 1rem;
            backdrop-filter: blur(8px);
            box-shadow: 0 0 30px rgba(139, 92, 246, 0.1), inset 0 1px 0 rgba(255, 255, 255, 0.05);
            animation: scenarioBannerFadeIn 0.8s ease both;
        }

        .scenario-banner-icon {
            width: 2.5rem;
            height: 2.5rem;
            margin-bottom: 0.75rem;
            color: rgba(167, 139, 250, 0.7);
        }

        .scenario-banner-icon svg {
            width: 100%;
            height: 100%;
        }

        .scenario-banner-label {
            font-size: 0.65rem;
            font-weight: 700;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: rgba(167, 139, 250, 0.6);
            margin-bottom: 1rem;
        }

        .scenario-banner-story-title {
            font-size: 1.85rem;
            font-weight: 800;
            color: rgba(224, 231, 255, 0.95);
            margin-top: 0.25rem;
            margin-bottom: 0.15rem;
            letter-spacing: -0.02em;
            text-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
        }

        .scenario-banner-narrative-subtitle {
            font-size: 1.2rem;
            font-style: italic;
            color: rgba(167, 139, 250, 0.8);
            margin-bottom: 1.5rem;
            font-weight: 500;
        }

        .scenario-banner-content {
            font-size: 0.95rem;
            line-height: 1.75;
            color: rgba(209, 213, 219, 0.9);
            font-style: italic;
            text-align: left;
        }

        .scenario-banner-content p {
            margin-bottom: 0.5rem;
        }

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

        .scenario-banner-content strong {
            color: rgba(221, 214, 254, 0.95);
            font-style: normal;
        }

        .scenario-banner-content em {
            color: rgba(196, 181, 253, 0.85);
        }

        @keyframes scenarioBannerFadeIn {
            from {
                opacity: 0;
                transform: translateY(-10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* Bubble Container */
        .chat-bubble-container {
            width: 100%;
            max-width: 900px;
            margin: 0 auto 1rem auto;
            animation: fadeIn var(--transition-medium);
        }

        /* Swarm Deliberation Summary Card */
        .swarm-summary-card .swarm-summary-body {
            display: none;
        }

        .swarm-summary-card.swarm-open .swarm-summary-body {
            display: block;
        }

        .swarm-summary-card.swarm-open .swarm-chevron {
            transform: rotate(180deg);
        }

        .bubble-header {
            display: flex;
            justify-content: space-between;
            align-items: baseline;
            padding: 0 0.5rem 0.25rem 0.5rem;
            font-size: 0.85rem;
        }

        /* Timestamps: Hidden by default to reduce clutter, revealed on hover */
        .bubble-header .timestamp {
            opacity: 0;
            transition: opacity var(--transition-fast);
        }

        .chat-bubble-container:hover .bubble-header .timestamp {
            opacity: 1;
        }

        /* Bubble Styling: Sizing constraints and shadow effects */
        .bubble-body {
            font-size: var(--chat-font-size);
            font-family: var(--chat-font-family);
            position: relative;
            border: none;
            /* No outline */
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);

            /* Shrink to fit text, but max out at page width */
            width: fit-content;
            min-width: 120px;
            max-width: 100%;

            display: flow-root;
        }

        .bubble-body .whitespace-pre-wrap {
            /* This tells the browser: "If there is a newline character, show it." */
            white-space: pre-wrap !important;
            word-wrap: break-word;
            /* Prevent long words from breaking layout */
        }

        .bubble-char-image {
            float: left;
            width: var(--bubble-image-size);

            height: auto;
            border-radius: 0.5rem;
            margin-right: 1rem;
            margin-bottom: 0.5rem;
            shape-outside: margin-box;
        }

        /* Constraints for any in-line images (markdown or visual master) */
        #chat-window img {
            max-width: 100%;
            height: auto;
            display: block;
            /* Prevent baseline gaps */
        }

        /* Ensure code blocks don't break the bubble layout on mobile */
        .bubble-body pre {
            max-width: 100%;
            overflow-x: auto;
            background-color: #1e1e1e;
            padding: 1rem;
            border-radius: 0.5rem;
            margin: 0.5em 0;
        }

        /* Ensure markdown tables don't cause sideways scroll */
        .bubble-body table {
            display: block;
            max-width: 100%;
            overflow-x: auto;
            border-collapse: collapse;
        }

        /* Restore natural spacing for Markdown elements inside bubbles */
        .bubble-body p {
            margin-bottom: 0.0rem;
            /* Space between paragraphs */
        }

        .bubble-body p:last-child {
            margin-bottom: 0;
            /* No space after the last paragraph */
        }

        .bubble-body ul,
        .bubble-body ol {
            margin-bottom: 0.5rem;
            padding-left: 1.5rem;
            /* Indent lists */
        }

        .bubble-body li {
            list-style-type: disc;
            /* Restore bullet points */
        }

        .action-btn-group {
            opacity: 0;
            /* FIX: Add delay ONLY when hiding (mouse out) so cursor can bridge the gap */
            transition: opacity 0.2s ease-in-out 0.4s;
        }

        .chat-bubble-container:hover .action-btn-group {
            opacity: 1;
            /* FIX: Instant show on hover */
            transition-delay: 0s;
        }

        .message-dropdown-menu {
            width: max-content;
            min-width: max-content;
        }

        /* Touch devices never produce a reliable :hover, so the rule above never fires and
           the whole bar sits at opacity 0 permanently — every per-message action is
           unreachable on a phone. Reveal it there. The kebab is the entry point to the
           full menu, so it has to be visible without hovering. */
        @media (hover: none) {
            .action-btn-group {
                opacity: 1;
                transition-delay: 0s;
            }

            .chat-bubble-container .action-btn-group button {
                opacity: 0.6;
            }
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }

            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        @keyframes pulseOpacity {

            0%,
            100% {
                opacity: 1;
            }

            50% {
                opacity: 0.5;
            }
        }

        .typing-bubble-pulse {
            animation: pulseOpacity 1.5s infinite;
        }

        @keyframes flashOutline {
            0% {
                outline: 2px solid var(--chat-text-color);
                outline-offset: -2px;
            }

            100% {
                outline: 2px solid transparent;
                outline-offset: -2px;
            }
        }

        .flash-outline {
            animation: flashOutline 0.4s ease-out;
        }