/* --- NoteKash AI Magic Module (Co-Pilot)- */
        .ai-magic-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at center, rgba(var(--bg-primary-rgb), 0.5) 0%, rgba(var(--bg-primary-rgb), 0.8) 100%);
            z-index: 10001;
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 1rem;
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            animation: fadeIn 0.3s ease;
        }

        @keyframes ai-border-glow {
            from {
                border-color: color-mix(in srgb, var(--primary-color) 25%, transparent);
                box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.35),
                    0 0 8px -2px color-mix(in srgb, var(--primary-color) 30%, transparent);
            }

            to {
                border-color: color-mix(in srgb, var(--primary-color) 65%, transparent);
                box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.35),
                    0 0 25px 4px color-mix(in srgb, var(--primary-color) 25%, transparent);
            }
        }

        .ai-magic-modal {
            width: 100%;
            max-width: 720px;
            height: 85vh;
            max-height: 600px;
            display: flex;
            flex-direction: column;

            background-color: rgba(var(--bg-secondary-rgb), 0.6);
            background-image:
                radial-gradient(at 0% 0%, color-mix(in srgb, var(--primary-color) 15%, transparent) 0px, transparent 50%),
                radial-gradient(at 100% 100%, color-mix(in srgb, var(--cat-color-3-bg) 20%, transparent) 0px, transparent 50%);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1.5px solid;
            border-radius: 20px;
            box-shadow: 0 10px 40px -10px rgba(0, 0, 0, 0.35),
                inset 0 1px 1px rgba(255, 255, 255, 0.1);
            animation: growInFromCenter 0.8s cubic-bezier(0.4, 0, 0.2, 1),
                ai-border-glow 5s infinite alternate ease-in-out;
            overflow: hidden;
        }

        .ai-magic-header {
            padding: 0.75rem 1rem;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
            background-color: rgba(var(--bg-primary-rgb), 0.7);
            text-align: center;
        }

        .ai-magic-title {
            font-size: 1.5rem;
            font-weight: 700;
            letter-spacing: 0.3px;
            margin-bottom: 0.75rem;
            padding: 0.25rem 0;
            background-image: none;
            background-clip: unset;
            -webkit-background-clip: unset;
            -webkit-text-fill-color: unset;
            color: var(--primary-color);
        }


        .ai-magic-prompt-container {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 4px 4px 4px 12px;
            transition: all 0.2s ease-in-out;
        }

        #ai-magic-prompt-input {
            width: 100%;
            font-size: 0.95rem;
            border: none;
            background: transparent;
            color: var(--text-primary);
            outline: none;
            flex-grow: 1;
            resize: none;
        }

        #ai-magic-prompt-input::placeholder {
            color: var(--text-secondary);
            opacity: 0.8;
        }

        .ai-magic-prompt-container:focus-within {
            border-color: var(--primary-color);
            background-color: var(--bg-secondary);
            box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 25%, transparent),
                inset 0 1px 2px rgba(0, 0, 0, 0.1);
        }

        #ai-magic-command-list {
            overflow-y: auto;
            flex-grow: 1;
            padding: 1rem;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 0.75rem;
        }

        #ai-magic-command-list.compact-grid {
            justify-content: start;
            grid-template-columns: repeat(auto-fit, 180px);
        }

        .ai-magic-command-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px;
            border-radius: var(--border-radius);
            background: linear-gradient(145deg, rgba(var(--bg-primary-rgb), 0.4), rgba(var(--bg-primary-rgb), 0.7));
            cursor: pointer;
            transition: all 0.2s ease-in-out;
            border: 1px solid var(--border-color);
            position: relative;
        }

        /* --- RESPONSE MODE STYLES --- */
        #ai-magic-command-list.response-mode {
            display: block !important;
            font-family: var(--font-primary);
            color: var(--text-primary);
            line-height: 1.6;
            padding: 2rem;
            animation: fadeIn 0.4s ease-out;
            user-select: text;
            /* Allow selecting text in response */
            cursor: text;
        }

        .ai-magic-response-actions {
            display: flex;
            gap: 10px;
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px solid var(--border-color);
            justify-content: flex-end;
        }

        .ai-magic-response-content b {
            font-weight: 700;
            color: var(--primary-color);
        }

        .ai-magic-response-content h1,
        .ai-magic-response-content h2,
        .ai-magic-response-content h3 {
            margin-top: 1em;
            margin-bottom: 0.5em;
            font-family: var(--article-font-family);
        }


        .ai-magic-command-item:hover {
            transform: translateY(-4px) scale(1.02);
            border-color: color-mix(in srgb, var(--primary-color) 70%, var(--border-color));
            background: linear-gradient(145deg, rgba(var(--bg-secondary-rgb), 0.7), rgba(var(--bg-primary-rgb), 0.9));
            box-shadow: 0 0 20px 5px color-mix(in srgb, var(--primary-color) 15%, transparent);
        }

        .ai-magic-command-item.selected {
            transform: translateY(-4px) scale(1.03);
            background-color: var(--bg-primary);
            border-color: var(--primary-color);
            box-shadow: 0 0 20px -5px color-mix(in srgb, var(--primary-color) 40%, transparent);
        }

        .ai-magic-command-item.selected::after {
            content: '⏎';
            position: absolute;
            right: 8px;
            top: 8px;
            font-size: 0.9rem;
            color: var(--primary-color);
            font-weight: bold;
        }

        .ai-magic-command-item .command-icon {
            width: 36px;
            height: 36px;
            font-size: 1.3rem;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-color);
            background-color: var(--bg-tertiary);
            border-radius: 8px;
            box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.1);
        }

        .ai-magic-command-item .command-text {
            overflow: hidden;
        }

        .ai-magic-command-item .command-title {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--text-primary);
        }

        .ai-magic-separator {
            grid-column: 1 / -1;
            margin: 8px 0;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-tertiary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            display: flex;
            align-items: center;
        }

        .ai-magic-separator:empty {
            height: 1px;
            background-color: var(--border-color);
            margin: 4px 0;
            opacity: 0.6;
        }

        .ai-magic-separator:not(:empty)::after {
            content: '';
            flex: 1;
            height: 1px;
            background-color: var(--border-color);
            margin-left: 8px;
            opacity: 0.4;
        }

        #ai-magic-prompt-send {
            flex-shrink: 0;
            background: var(--action-button-gradient);
            border: 1px solid rgba(0, 0, 0, 0.1);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

        #ai-magic-prompt-send:hover {
            transform: scale(1.1);
            box-shadow: 0 0 12px color-mix(in srgb, var(--primary-color) 40%, transparent);
        }

        #ai-magic-prompt-send:active {
            transform: scale(0.95);
            box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
            transition-duration: 0.1s;
        }

        #ai-magic-prompt-send svg {
            transform: translateX(1px);
        }

        /* ---Premium AI Upsell Card --- */
        .ai-upsell-card {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            padding: 2rem 1.5rem;
            height: 100%;
            box-sizing: border-box;
            justify-content: center;
            animation: fadeIn 0.5s ease-out 0.1s backwards;
            border-radius: var(--border-radius-lg);
            background:
                linear-gradient(rgba(var(--bg-secondary-rgb), 0.8), rgba(var(--bg-secondary-rgb), 0.8)) padding-box,
                linear-gradient(145deg, var(--primary-color), color-mix(in srgb, var(--primary-color) 40%, transparent)) border-box;
            box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.1);
        }

        .ai-upsell-card .badge-icon {
            margin-bottom: 1.5rem;
            transform: scale(1.15);
        }

        .ai-upsell-card h4 {
            font-family: var(--font-display);
            font-size: 1.5rem;
            margin: 0 0 0.75rem 0;
            background-image: var(--action-button-gradient);
            background-size: 100%;
            background-clip: text;
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        [data-theme="dark"] .ai-upsell-card h4 {
            background-image: linear-gradient(45deg, #E0B453, #E6845E);
        }

        .ai-upsell-card p {
            color: var(--text-secondary);
            max-width: 400px;
            line-height: 1.6;
            font-size: 1rem;
            margin: 0 0 2rem 0;
        }

        .ai-upsell-card .btn-primary {
            padding: 0.8rem 2rem;
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 2rem;
            box-shadow: 0 0 25px -5px color-mix(in srgb, var(--primary-color) 50%, transparent);
            border: 1px solid rgba(0, 0, 0, 0.1);
        }

        .ai-upsell-card .witty-gradient-text {
            font-size: 1rem;
            font-style: italic;
            opacity: 0.85;
        }




        /* --- Command Palette --- */
        #command-palette {
            position: absolute;
            z-index: 10002;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow-lg);
            width: 380px;
            max-height: 400px;
            padding: 0;
            display: flex;
            flex-direction: column;
            overflow: visible;
        }

        #command-palette-input-wrapper {
            padding: 8px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        #command-palette-input {
            width: 100%;
            padding: 8px 12px;
            font-size: 1rem;
            border-radius: 6px;
            border: 1px solid var(--border-color);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            outline: none;
        }

        #command-palette-input:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-color) 20%, transparent);
        }

        #command-palette-list {
            padding: 4px;
            overflow-y: auto;
            flex-grow: 1;
        }

        .command-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 10px;
            border-radius: 6px;
            cursor: pointer;
            user-select: none;
        }

        .command-item.selected {
            background-color: var(--primary-color);
            color: var(--text-on-primary);
        }

        .command-item-icon {
            width: 32px;
            height: 32px;
            font-size: 1rem;
            flex-shrink: 0;
            text-align: center;
            display: flex;
            align-items: center;
            justify-content: center;
            background-color: var(--bg-tertiary);
            border-radius: 4px;
        }

        .command-item.selected .command-item-icon {
            background-color: rgba(255, 255, 255, 0.2);
        }

        .command-item-text {
            display: flex;
            flex-direction: column;
            overflow: hidden;
        }

        .command-item-title {
            font-weight: 500;
            font-size: 0.9rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .command-item-desc {
            font-size: 0.8rem;
            opacity: 0.7;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .command-item.selected .command-item-desc {
            color: var(--text-on-primary);
        }


        /* Command Palette Preview Side-Pane (Premium Glass - Compact) */
        .nk-command-palette-preview {
            position: absolute;
            left: 100%;
            top: 0;
            width: 260px;
            min-height: 80px;
            max-height: 300px;
            background: rgba(255, 255, 255, 0.90);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-left: 1px solid var(--border-color);
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
            margin-left: 12px;
            padding: 14px;
            z-index: 10000;
            opacity: 0;
            transform: translateX(-10px) scale(0.98);
            transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
            pointer-events: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
            overflow: hidden;
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
        }

        [data-theme="dark"] .nk-command-palette-preview {
            background: rgba(30, 30, 35, 0.85);
            border: 1px solid rgba(255, 255, 255, 0.08);
            box-shadow: 0 10px 50px rgba(0, 0, 0, 0.6);
        }

        .nk-preview-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 6px;
            /* Reduced padding */
            border-bottom: 1px solid var(--border-color);
            margin-bottom: 0;
        }

        .nk-preview-badge {
            font-size: 0.65rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            font-weight: 700;
            color: var(--primary-color);
            background: color-mix(in srgb, var(--primary-color) 10%, transparent);
            padding: 2px 6px;
            border-radius: 8px;
        }

        .nk-preview-title {
            font-family: var(--article-font-family);
            font-size: 0.90rem;
            /* Same size as content */
            font-weight: 700;
            /* Bold title */
            color: var(--text-primary);
            line-height: 1.3;
            margin: 0;
            padding-top: 2px;
        }

        .nk-preview-content {
            font-size: 0.85rem;
            font-weight: 400;
            color: var(--text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 6;
            -webkit-box-orient: vertical;
            overflow: hidden;
            font-family: var(--article-font-family);
        }


        .nk-preview-content.is-snippet {
            font-size: 0.85rem;
            font-weight: 500;
            font-style: normal;
            color: var(--text-primary);
            border-left: 3px solid var(--primary-color);
            padding-left: 10px;
            margin: 2px 0;
            opacity: 0.9;
        }

        .nk-preview-hint {
            font-size: 0.7rem;
            color: var(--text-tertiary);
            margin-top: auto;
            text-align: right;
            padding-top: 6px;
            border-top: 1px solid var(--border-color);
        }

        /* --- Styled Task Button in Editor --- */
        .nk-task-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: linear-gradient(135deg, var(--primary-color), color-mix(in srgb, var(--primary-color), black 10%));
            color: white !important;
            padding: 4px 12px 4px 10px;
            border-radius: 20px;
            font-size: 0.9em;
            font-weight: 500;
            text-decoration: none !important;
            margin: 2px 4px;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.15);
            transition: transform 0.1s;
            user-select: none;
            cursor: pointer;
            vertical-align: middle;
        }

        .nk-task-link:hover {
            transform: translateY(-1px);
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
        }

        .nk-task-link:active {
            transform: translateY(0);
        }

        .nk-task-link::after {
            content: "►";
            /* Play icon hint */
            font-size: 0.7em;
            opacity: 0.7;
            margin-left: 4px;
        }

        .nk-command-palette-preview.visible {
            opacity: 1;
            transform: translateX(0) scale(1);
            pointer-events: auto;
        }

        [data-theme="sepia"] .nk-command-palette-preview {
            background: rgba(251, 240, 217, 0.90);
            border-color: rgba(93, 64, 55, 0.15);
        }

        .emoji-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(48px, 1fr));
            gap: 4px;
            padding: 8px;
            max-height: 400px;
            overflow-y: auto;
        }

        .emoji-grid-item {
            width: 48px;
            height: 48px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            cursor: pointer;
            border-radius: 6px;
            transition: all 0.15s ease;
            background-color: var(--bg-tertiary);
            user-select: none;
        }

        .emoji-grid-item:hover {
            background-color: var(--bg-secondary);
            transform: scale(1.1);
        }

        .emoji-grid-item.selected {
            background-color: var(--primary-color);
            transform: scale(1.15);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
        }

        .emoji-grid-item i {
            font-size: 1.5rem;
        }

        .nk-stat-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--bg-tertiary);
            color: var(--text-secondary);
            padding: 4px 10px;
            border-radius: 16px;
            font-size: 0.85rem;
            font-family: var(--font-body);
            font-weight: 500;
            border: 1px solid var(--border-color);
            cursor: default;
            user-select: none;
            margin: 0 4px;
        }

        .nk-stat-badge i {
            font-size: 0.85em;
            line-height: 1;
        }


        /* --- Timeline Block (2-Column Parallel Flow, Zero Space Wastage & Premium Polish) --- */
        .nk-timeline-block {
            position: relative;
            display: grid;
            grid-template-columns: 1fr 1fr;
            column-gap: 72px;
            row-gap: 0px;
            padding: 2.25rem 0 1.5rem;
            margin: 2.5rem auto;
            max-width: 90ch;
            font-size: 0.82em;
            line-height: 1.55;
            box-sizing: border-box;
            align-items: start;
        }

        /* MOBILE PREVIEW FIX */
        @media (max-width: 800px) {
            .nk-command-palette-preview {
                left: 0 !important;
                right: 0 !important;
                top: 100% !important;
                width: 100% !important;
                min-width: unset !important;
                margin-left: 0 !important;
                margin-top: 10px;
                transform: translateY(10px) scale(0.98);
            }

            .nk-command-palette-preview.visible {
                transform: translateY(0) scale(1);
            }
        }

        /* Luminous Central Spine with Soft Gradient Fade at Terminations */
        .nk-timeline-block::before {
            content: '';
            position: absolute;
            top: 20px;
            left: 50%;
            bottom: 45px;
            transform: translateX(-50%);
            width: 2.5px;
            background: linear-gradient(180deg,
                    transparent 0%,
                    var(--primary-color) 4%,
                    var(--primary-color) 96%,
                    transparent 100%);
            box-shadow: 0 0 10px color-mix(in srgb, var(--primary-color) 40%, transparent);
            border-radius: 3px;
            z-index: 1;
        }

        .nk-timeline-entry {
            position: relative;
            width: 100%;
            margin-bottom: 24px;
            box-sizing: border-box;
            z-index: 2;
        }

        /* Left Column (Odd Entries) */
        .nk-timeline-entry:nth-child(odd) {
            grid-column: 1;
            text-align: left;
        }

        /* Right Column (Even Entries) - Subtle Stagger for Natural Reading Rhythm */
        .nk-timeline-entry:nth-child(even) {
            grid-column: 2;
            margin-top: 36px;
            text-align: left;
        }

        /* Glowing Center Nodes on the 50% Central Spine */
        .nk-timeline-entry::after {
            content: '';
            position: absolute;
            width: 12px;
            height: 12px;
            background-color: var(--primary-color);
            border: 2.5px solid var(--bg-secondary);
            border-radius: 50%;
            top: 24px;
            transform: translateY(-50%);
            z-index: 5;
            box-shadow: 0 0 0 2px color-mix(in srgb, var(--primary-color) 45%, transparent),
                        0 0 10px var(--primary-color);
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
        }

        .nk-timeline-entry:nth-child(odd)::after {
            right: -42px;
        }

        .nk-timeline-entry:nth-child(even)::after {
            left: -42px;
        }

        .nk-timeline-entry:hover {
            z-index: 10;
        }

        .nk-timeline-entry:hover::after {
            transform: translateY(-50%) scale(1.4);
            box-shadow: 0 0 0 3px color-mix(in srgb, var(--primary-color) 60%, transparent),
                        0 0 18px var(--primary-color);
        }

        /* Elevated Card / Tile Design */
        .nk-timeline-content {
            padding: 1.15rem 1.35rem;
            background-color: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-top: 3px solid var(--primary-color);
            border-radius: 14px;
            box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.08), var(--shadow-sm);
            position: relative;
            transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                        box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1),
                        border-color 0.2s ease;
        }

        .nk-timeline-content:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px -4px rgba(0, 0, 0, 0.16),
                        0 0 18px color-mix(in srgb, var(--primary-color) 18%, transparent);
            border-color: color-mix(in srgb, var(--primary-color) 45%, var(--border-color));
        }

        /* Mathematical S-Curve Connector Streams */
        .nk-timeline-content::before {
            content: '';
            position: absolute;
            top: 22px;
            width: 36px;
            height: 24px;
            background-color: var(--primary-color);
            pointer-events: none;
            opacity: 0.85;
            transition: opacity 0.25s ease, filter 0.25s ease;
            z-index: 3;
        }

        /* Left entry: Connects node at spine (x=36, y=2) curving into card (x=0, y=22) */
        .nk-timeline-entry:nth-child(odd) .nk-timeline-content::before {
            right: -36px;
            mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 36 24' fill='none'%3E%3Cpath d='M36 2 C20 2 16 22 0 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
            -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 36 24' fill='none'%3E%3Cpath d='M36 2 C20 2 16 22 0 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
        }

        /* Right entry: Connects node at spine (x=0, y=2) curving into card (x=36, y=22) */
        .nk-timeline-entry:nth-child(even) .nk-timeline-content::before {
            left: -36px;
            mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 36 24' fill='none'%3E%3Cpath d='M0 2 C16 2 20 22 36 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
            -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 36 24' fill='none'%3E%3Cpath d='M0 2 C16 2 20 22 36 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain;
        }

        .nk-timeline-entry:hover .nk-timeline-content::before {
            opacity: 1;
            filter: drop-shadow(0 0 5px var(--primary-color));
        }

        /* Refined Micro-Typography */
        .nk-timeline-date {
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 0.45rem;
            font-size: 0.88em;
            letter-spacing: 0.035em;
            line-height: 1.35;
            outline: none;
            display: inline-block;
            transition: color 0.2s ease;
        }

        .nk-timeline-title {
            font-weight: 500;
            font-size: 0.98em;
            line-height: 1.6;
            color: var(--text-primary);
            outline: none;
        }

        /* Add Entry Button - Centered across both columns */
        .nk-timeline-add {
            grid-column: 1 / -1;
            text-align: center;
            position: relative;
            padding-top: 1.25rem;
            padding-bottom: 0.5rem;
            z-index: 4;
        }

        .nk-timeline-add button {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 3px solid var(--bg-secondary);
            background-color: var(--primary-color);
            color: var(--text-on-primary, #ffffff);
            font-size: 1.35rem;
            line-height: 1;
            cursor: pointer;
            transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
            box-shadow: 0 0 12px color-mix(in srgb, var(--primary-color) 45%, transparent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto;
            padding: 0;
            font-weight: 300;
        }

        .nk-timeline-add button:hover {
            background-color: var(--primary-color-hover, var(--primary-color));
            transform: scale(1.15) rotate(90deg);
            box-shadow: 0 0 18px var(--primary-color);
        }

        /* Mobile & Tablet Responsive Flow */
        @media (max-width: 768px) {
            .nk-timeline-block {
                display: flex !important;
                flex-direction: column !important;
                padding-left: 0.5rem;
                padding-right: 0.5rem;
            }

            .nk-timeline-block::before {
                left: 18px;
            }

            .nk-timeline-entry {
                width: 100% !important;
                left: 0 !important;
                padding-left: 46px !important;
                padding-right: 0 !important;
                text-align: left !important;
                margin-top: 0 !important;
                margin-bottom: 18px !important;
            }

            .nk-timeline-entry::after {
                left: 12px !important;
                right: auto !important;
                top: 22px !important;
            }

            .nk-timeline-entry .nk-timeline-content::before {
                left: -28px !important;
                right: auto !important;
                width: 28px !important;
                top: 20px !important;
                mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 28 24' fill='none'%3E%3Cpath d='M0 2 C14 2 14 22 28 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain !important;
                -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 28 24' fill='none'%3E%3Cpath d='M0 2 C14 2 14 22 28 22' stroke='black' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") no-repeat center / contain !important;
            }

            .nk-timeline-add {
                text-align: left;
                padding-left: 0;
            }
        }

        .focus-mode-overlay .nk-timeline-block {
            max-width: 100%;
            margin-left: 0;
            margin-right: 0;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        /* ── Table of Contents (TOC) Component ──────────────────────── */
        #article-content .nk-toc-block {
            background-color: var(--bg-secondary) !important;
            border: 1px solid var(--border-color) !important;
            border-left: 4px solid var(--primary-color) !important; /* Premium left accent line */
            border-radius: 8px !important;
            padding: 20px 24px !important;
            margin: 28px 0 !important;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04) !important;
        }

        /* Force Inter font family on everything inside TOC block with high specificity */
        #article-content .nk-toc-block, 
        #article-content .nk-toc-block * {
            font-family: 'Inter', system-ui, -apple-system, sans-serif !important;
        }

        .nk-toc-header {
            display: flex !important;
            align-items: center !important;
            justify-content: space-between !important;
            padding-bottom: 14px !important;
            margin-bottom: 16px !important;
            border-bottom: 1px solid var(--border-color) !important;
        }

        .nk-toc-title {
            font-size: 1.05rem !important; /* Clean premium font size */
            font-weight: 600 !important;
            color: var(--text-primary) !important; /* Rich theme-sensitive color */
            display: flex !important;
            align-items: center !important;
            gap: 8px !important;
            margin: 0 !important;
        }
        .nk-toc-refresh-btn {
            background: transparent !important;
            border: none !important;
            color: var(--text-secondary) !important;
            cursor: pointer !important;
            padding: 6px !important;
            border-radius: 50% !important;
            font-size: 1.1rem !important; /* Make unicode refresh icon prominent and clear */
            transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
            display: inline-flex !important;
            align-items: center !important;
            justify-content: center !important;
            width: 32px !important;
            height: 32px !important;
        }

        .nk-toc-refresh-btn:hover {
            background-color: var(--bg-tertiary) !important;
            color: var(--primary-color) !important;
            transform: rotate(180deg) !important;
        }

        .nk-toc-list {
            display: flex !important;
            flex-direction: column !important;
            gap: 12px !important;
        }

        .nk-toc-item {
            font-size: 1.02rem !important; /* Increased readable font size */
            font-weight: 500 !important;
            color: var(--text-primary) !important; /* Highly readable, no blur */
            text-decoration: none !important;
            display: inline-flex !important;
            align-items: center !important;
            position: relative !important;
            transition: color 0.15s ease !important; /* Smooth color-only transition */
            cursor: pointer !important;
            line-height: 1.5 !important;
            padding: 2px 0 !important;
        }

        .nk-toc-item:hover {
            color: var(--primary-color) !important; /* Simple premium color change on hover */
        }

        /* Hierarchy Indentations and Sizes */
        .nk-toc-item.nk-toc-h1 { padding-left: 0 !important; font-weight: 600 !important; }
        .nk-toc-item.nk-toc-h2 { padding-left: 18px !important; }
        .nk-toc-item.nk-toc-h3 { padding-left: 36px !important; font-size: 0.98rem !important; opacity: 0.95 !important; }
        .nk-toc-item.nk-toc-h4 { padding-left: 54px !important; font-size: 0.98rem !important; opacity: 0.95 !important; }
        .nk-toc-item.nk-toc-h5 { padding-left: 72px !important; font-size: 0.92rem !important; opacity: 0.9 !important; }
        .nk-toc-item.nk-toc-h6 { padding-left: 90px !important; font-size: 0.92rem !important; opacity: 0.9 !important; }