:root {
            --primary-color: #2889e5;
            --primary-dark: #1e6bc4;
            --primary-light: #eaf3fc;
            --text-main: #2d3748;
            --text-muted: #718096;
            --bg-page: #f8fafc;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --shadow: 0 10px 25px -5px rgba(40, 137, 229, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
            --radius: 12px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
            background-color: var(--bg-page);
            color: var(--text-main);
            line-height: 1.7;
            padding: 20px 10px;
        }

        /* Container with max-width 1440px */
        .page-container {
            max-width: 1440px;
            margin: 0 auto;
            background-color: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        /* Top Accent Bar */
        .header-bar {
            height: 6px;
            background-color: var(--primary-color);
            width: 100%;
        }

        /* Article Wrapper */
        .article-wrapper {
            padding: 40px 60px;
        }

        /* Article Header */
        .article-header {
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 24px;
            margin-bottom: 32px;
        }

        .meta-tags {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .tag {
            background-color: var(--primary-light);
            color: var(--primary-color);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .publish-date {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: #1a202c;
            line-height: 1.3;
            margin-bottom: 20px;
        }

        /* Interactive Controls Banner */
        .interactive-toolbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            background-color: #f1f5f9;
            padding: 12px 20px;
            border-radius: 8px;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .reading-time {
            font-size: 0.9rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .action-buttons {
            display: flex;
            gap: 10px;
        }

        .btn {
            background: #ffffff;
            border: 1px solid var(--border-color);
            color: var(--text-main);
            padding: 6px 14px;
            border-radius: 6px;
            cursor: pointer;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all 0.2s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .btn:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
        }

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

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

        /* Layout Grid */
        .content-grid {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 40px;
        }

        /* Main Content */
        .main-content {
            font-size: 1.05rem;
        }

        .dateline {
            font-weight: 700;
            color: var(--primary-color);
        }

        p {
            margin-bottom: 20px;
            color: #334155;
        }

        /* Interactive Media Placeholder */
        .media-placeholder {
            width: 100%;
            height: 380px;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            border-radius: var(--radius);
            margin: 30px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            position: relative;
            overflow: hidden;
            border: 1px solid var(--border-color);
            cursor: pointer;
            transition: transform 0.3s ease;
        }

        .media-placeholder:hover {
            transform: translateY(-2px);
        }

        .media-placeholder::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: radial-gradient(circle at 50% 50%, rgba(40, 137, 229, 0.2), transparent 70%);
        }

        .media-icon {
            width: 64px;
            height: 64px;
            background: rgba(255, 255, 255, 0.1);
            backdrop-filter: blur(8px);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 12px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            z-index: 1;
        }

        .media-title {
            font-weight: 600;
            font-size: 1.1rem;
            z-index: 1;
        }

        .media-sub {
            font-size: 0.85rem;
            color: #94a3b8;
            z-index: 1;
            margin-top: 4px;
        }

        /* Pull Quote / Callout */
        .quote-box {
            border-left: 4px solid var(--primary-color);
            background-color: var(--primary-light);
            padding: 24px;
            border-radius: 0 8px 8px 0;
            margin: 30px 0;
        }

        .quote-text {
            font-size: 1.1rem;
            font-style: italic;
            color: #1e293b;
            margin-bottom: 10px;
        }

        .quote-author {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--primary-color);
        }

        /* Sidebar / Sticky Info */
        .sidebar-section {
            position: sticky;
            top: 20px;
            display: flex;
            flex-direction: flex-direction;
            flex-direction: column;
            gap: 24px;
        }

        .card {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius);
            padding: 24px;
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: #0f172a;
            margin-bottom: 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid var(--primary-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card-title::before {
            content: '';
            width: 4px;
            height: 16px;
            background-color: var(--primary-color);
            border-radius: 2px;
        }

        /* Interactive Like/Clap */
        .interactive-widget {
            text-align: center;
            background: linear-gradient(180deg, #ffffff 0%, var(--primary-light) 100%);
        }

        .like-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            cursor: pointer;
            box-shadow: 0 4px 12px rgba(40, 137, 229, 0.3);
            transition: all 0.2s ease;
            margin: 10px auto;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }

        .like-btn:hover {
            transform: scale(1.08);
            background-color: var(--primary-dark);
        }

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

        .like-count {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--primary-color);
        }

        /* Key Metrics */
        .spec-list {
            list-style: none;
        }

        .spec-item {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px dashed var(--border-color);
            font-size: 0.9rem;
        }

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

        .spec-label {
            color: var(--text-muted);
        }

        .spec-value {
            font-weight: 600;
            color: #1e293b;
        }

        /* Collapsible Section */
        .collapsible {
            background-color: #f8fafc;
            color: #334155;
            cursor: pointer;
            padding: 14px;
            width: 100%;
            border: 1px solid var(--border-color);
            text-align: left;
            outline: none;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 6px;
            transition: 0.2s;
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 10px;
        }

        .collapsible:hover, .active-collapse {
            background-color: var(--primary-light);
            color: var(--primary-color);
        }

        .collapse-content {
            padding: 0 14px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #ffffff;
            border-radius: 0 0 6px 6px;
        }

        .collapse-content p {
            padding: 12px 0 4px 0;
            font-size: 0.9rem;
        }

        /* Notification Toast */
        .toast {
            visibility: hidden;
            min-width: 250px;
            background-color: #1e293b;
            color: #fff;
            text-align: center;
            border-radius: 8px;
            padding: 12px;
            position: fixed;
            z-index: 1000;
            bottom: 30px;
            right: 30px;
            font-size: 0.9rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            opacity: 0;
            transition: opacity 0.3s, visibility 0.3s;
        }

        .toast.show {
            visibility: visible;
            opacity: 1;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .content-grid {
                grid-template-columns: 1fr;
            }

            .sidebar-section {
                position: static;
            }

            .article-wrapper {
                padding: 30px 24px;
            }

            .article-title {
                font-size: 1.75rem;
            }
        }

        @media (max-width: 640px) {
            body {
                padding: 0;
            }

            .page-container {
                border-radius: 0;
                border: none;
            }

            .article-wrapper {
                padding: 20px 16px;
            }

            .article-title {
                font-size: 1.4rem;
            }

            .interactive-toolbar {
                flex-direction: column;
                align-items: flex-start;
            }

            .action-buttons {
                width: 100%;
                justify-content: space-between;
            }

            .media-placeholder {
                height: 240px;
            }
        }