:root {
            --color-dark: #1e293b;
            --color-accent-teal: #0891b2;
            --color-accent-amber: #f59e0b;
            --color-bg-light: #f8fafc;
            --color-card: #ffffff;
            --color-text-body: #334155;
            --color-text-heading: #1e293b;
            --color-border: #e2e8f0;
            --color-udemy: #a435f0;
            --color-linkedin: #0a66c2;
            --color-coursera: #0056d2;
            --color-orange: #ff9900;
            --color-oreilly: #d3002d;
        }

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

        body {
            font-family: 'Inter', sans-serif;
            font-size: 17px;
            line-height: 1.6;
            color: var(--color-text-body);
            background-color: var(--color-bg-light);
        }

        /* Header */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 1rem 2rem;
            background-color: transparent;
            transition: all 0.3s ease;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        header.scrolled {
            background-color: var(--color-card);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }

        .header-logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-heading);
        }

        header.transparent .header-logo {
            color: var(--color-card);
        }

        nav {
            display: flex;
            gap: 2rem;
        }

        nav a {
            text-decoration: none;
            color: var(--color-text-body);
            font-weight: 500;
            transition: color 0.3s ease;
        }

        header.transparent nav a {
            color: var(--color-card);
        }

        nav a:hover {
            color: var(--color-accent-teal);
        }

        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 0.4rem;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background-color: var(--color-card);
            transition: all 0.3s ease;
        }

        header.transparent .hamburger span {
            background-color: var(--color-card);
        }

        /* Hero Section */
        .hero {
            min-height: 100vh;
            background-color: var(--color-dark);
            padding: 120px 2rem 4rem;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .hero-container {
            max-width: 1200px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
            width: 100%;
        }

        .hero-content {
            color: var(--color-card);
        }

        .hero-headline {
            font-size: 3rem;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1.5rem;
        }

        .hero-text {
            font-size: 1.1rem;
            line-height: 1.8;
            margin-bottom: 1.5rem;
            opacity: 0.9;
        }

        .hero-text p {
            margin-bottom: 1rem;
        }

        .hero-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn {
            padding: 0.75rem 2rem;
            border-radius: 0.375rem;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            font-size: 1rem;
        }

        .btn-primary {
            background-color: var(--color-accent-teal);
            color: var(--color-card);
        }

        .btn-primary:hover {
            background-color: #0e7490;
            transform: translateY(-2px);
            box-shadow: 0 8px 16px rgba(8, 145, 178, 0.3);
        }

        .btn-outline {
            border: 2px solid var(--color-card);
            color: var(--color-card);
            background-color: transparent;
        }

        .btn-outline:hover {
            background-color: var(--color-card);
            color: var(--color-accent-teal);
            transform: translateY(-2px);
        }

        .hero-image {
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .hero-image img {
            width: 100%;
            max-width: 400px;
            border-radius: 50%;
            border: 4px solid var(--color-accent-teal);
            box-shadow: 0 0 40px rgba(8, 145, 178, 0.3);
        }

        /* Pillars Section */
        .pillars {
            padding: 6rem 2rem;
            background-color: var(--color-bg-light);
        }

        .pillars-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .pillars-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
        }

        .pillar-card {
            background-color: var(--color-card);
            padding: 2.5rem 2rem;
            border-radius: 0.5rem;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            border-left: 4px solid var(--color-accent-teal);
        }

        .pillar-card:hover {
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
        }

        .pillar-icon {
            font-size: 2.5rem;
            margin-bottom: 1rem;
        }

        .pillar-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--color-text-heading);
        }

        .pillar-card p {
            color: var(--color-text-body);
            line-height: 1.8;
        }

        /* Experience & Education */
        .experience-section {
            padding: 6rem 2rem;
            background-color: var(--color-card);
        }

        .experience-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .experience-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 1.5rem;
        }

        .experience-intro {
            font-size: 1.1rem;
            line-height: 1.8;
            color: var(--color-text-body);
            margin-bottom: 3rem;
            max-width: 900px;
        }

        .experience-columns {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 4rem;
        }

        .career-column h3,
        .education-column h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-text-heading);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 2rem;
            padding-bottom: 0.75rem;
            border-bottom: 3px solid var(--color-accent-teal);
            display: inline-block;
        }

        .career-phases {
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
        }

        .career-phase {
            position: relative;
            padding-left: 1.5rem;
            border-left: 2px solid var(--color-border);
        }

        .career-phase::before {
            content: '';
            position: absolute;
            left: -6px;
            top: 6px;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--color-accent-teal);
        }

        .phase-period {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent-teal);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.5rem;
        }

        .phase-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 0.5rem;
        }

        .phase-description {
            color: var(--color-text-body);
            line-height: 1.8;
        }

        .industry-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.75rem;
        }

        .industry-tag {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 999px;
            font-size: 0.8rem;
            font-weight: 500;
            background-color: rgba(8, 145, 178, 0.08);
            color: var(--color-accent-teal);
            border: 1px solid rgba(8, 145, 178, 0.2);
        }

        .education-list {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }

        .edu-item {
            padding: 1.5rem;
            background-color: var(--color-bg-light);
            border-radius: 0.5rem;
            border-left: 4px solid var(--color-accent-teal);
        }

        .edu-degree {
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 0.25rem;
        }

        .edu-school {
            color: var(--color-accent-teal);
            font-weight: 500;
            margin-bottom: 0.25rem;
        }

        .edu-detail {
            font-size: 0.9rem;
            color: var(--color-text-body);
        }

        /* Stats Bar */
        .stats-bar {
            background-color: #0f172a;
            padding: 2rem;
            text-align: center;
            color: var(--color-card);
        }

        .stats-content {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 3rem;
            flex-wrap: wrap;
            font-weight: 500;
        }

        .stats-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        /* Books Section */
        .books-section {
            padding: 5rem 2rem;
            background-color: var(--color-card);
        }

        .books-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .books-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-text-heading);
            text-align: center;
            margin-bottom: 0.75rem;
        }

        .books-subtitle {
            text-align: center;
            color: var(--color-text-body);
            max-width: 700px;
            margin: 0 auto 3rem;
            font-size: 1.05rem;
        }

        .books-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            justify-items: center;
        }

        .books-grid .book-card:nth-child(n+5) {
            /* Center the last row of 3 items */
        }

        .book-card {
            background: var(--color-bg-light);
            border-radius: 12px;
            padding: 1.5rem;
            text-align: center;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .book-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
        }

        .book-cover {
            width: 160px;
            height: 210px;
            object-fit: contain;
            border-radius: 4px;
            margin-bottom: 1.25rem;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }

        .book-card h3 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }

        .book-publisher {
            font-size: 0.8rem;
            color: #64748b;
            margin-bottom: 0.5rem;
        }

        .book-description {
            font-size: 0.85rem;
            color: var(--color-text-body);
            line-height: 1.5;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex-grow: 1;
        }

        .book-link {
            display: inline-block;
            padding: 0.4rem 1.2rem;
            background-color: var(--color-accent-teal);
            color: white;
            text-decoration: none;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: background-color 0.2s ease;
        }

        .book-link:hover {
            background-color: #0e7490;
        }

        /* Catalog Section */
        .catalog {
            padding: 6rem 2rem;
            background-color: var(--color-card);
        }

        .catalog-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .catalog-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 2rem;
            color: var(--color-text-heading);
        }

        .search-bar {
            position: relative;
            margin-bottom: 2rem;
        }

        .search-input {
            width: 100%;
            padding: 0.875rem 1rem;
            border: 1px solid var(--color-border);
            border-radius: 0.375rem;
            font-size: 1rem;
            font-family: 'Inter', sans-serif;
        }

        .search-input:focus {
            outline: none;
            border-color: var(--color-accent-teal);
            box-shadow: 0 0 0 3px rgba(8, 145, 178, 0.1);
        }

        .filters-section {
            margin-bottom: 2rem;
            padding-bottom: 1.5rem;
            border-bottom: 1px solid var(--color-border);
        }

        .filter-group {
            margin-bottom: 1rem;
        }

        .filter-label {
            font-weight: 600;
            color: var(--color-text-heading);
            margin-bottom: 0.5rem;
            display: block;
            font-size: 0.9rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }

        .filter-pills {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .pill {
            padding: 0.5rem 1rem;
            border: 1px solid var(--color-border);
            border-radius: 999px;
            background-color: transparent;
            color: var(--color-text-body);
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .pill:hover {
            border-color: var(--color-accent-teal);
            color: var(--color-accent-teal);
        }

        .pill.active {
            background-color: var(--color-accent-teal);
            color: var(--color-card);
            border-color: var(--color-accent-teal);
        }

        .catalog-controls {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 2rem;
            flex-wrap: wrap;
            gap: 1rem;
        }

        .result-counter {
            font-weight: 500;
            color: var(--color-text-body);
        }

        .clear-filters-btn {
            background-color: transparent;
            color: var(--color-accent-teal);
            border: 1px solid var(--color-accent-teal);
            padding: 0.5rem 1rem;
            border-radius: 0.375rem;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s ease;
            display: none;
        }

        .clear-filters-btn.visible {
            display: block;
        }

        .clear-filters-btn:hover {
            background-color: var(--color-accent-teal);
            color: var(--color-card);
        }

        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-bottom: 2rem;
        }

        .course-card {
            background-color: var(--color-bg-light);
            border-radius: 0.5rem;
            overflow: hidden;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
            transition: all 0.3s ease;
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border);
        }

        .course-card:hover {
            box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
        }

        .card-header {
            padding: 1rem 1.5rem;
            background-color: var(--color-card);
            border-bottom: 1px solid var(--color-border);
        }

        .platform-badge {
            display: inline-block;
            padding: 0.35rem 0.75rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--color-card);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.75rem;
        }

        .platform-badge.udemy {
            background-color: var(--color-udemy);
        }

        .platform-badge.linkedin {
            background-color: var(--color-linkedin);
        }

        .platform-badge.coursera {
            background-color: var(--color-coursera);
        }

        .platform-badge.amazon {
            background-color: var(--color-orange);
        }

        .platform-badge.oreilly {
            background-color: var(--color-oreilly);
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--color-text-heading);
            line-height: 1.4;
        }

        .card-body {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .card-description {
            color: var(--color-text-body);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 1rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-meta {
            display: flex;
            gap: 1rem;
            margin-bottom: 1rem;
            font-size: 0.85rem;
            color: var(--color-text-body);
        }

        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-bottom: 1rem;
        }

        .tag {
            background-color: var(--color-accent-teal);
            color: var(--color-card);
            padding: 0.3rem 0.6rem;
            border-radius: 0.25rem;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .rating {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            margin-bottom: 1rem;
            font-size: 0.9rem;
        }

        .stars {
            color: var(--color-accent-amber);
        }

        .card-footer {
            padding: 0 1.5rem 1.5rem;
            margin-top: auto;
            border-top: 1px solid var(--color-border);
            padding-top: 1rem;
        }

        .view-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--color-accent-teal);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .view-link:hover {
            gap: 0.75rem;
        }

        .empty-state {
            text-align: center;
            padding: 4rem 2rem;
            color: var(--color-text-body);
        }

        .empty-state-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--color-text-heading);
            margin-bottom: 0.5rem;
        }

        /* Services Section */
        .services-section {
            padding: 6rem 2rem;
            background-color: var(--color-dark);
            color: var(--color-card);
        }

        .services-container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .services-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--color-card);
            margin-bottom: 0.75rem;
        }

        .services-intro {
            font-size: 1.1rem;
            line-height: 1.8;
            opacity: 0.85;
            margin-bottom: 3rem;
            max-width: 800px;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
            margin-bottom: 3rem;
        }

        .service-card {
            background-color: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 0.5rem;
            padding: 2.5rem 2rem;
            transition: all 0.3s ease;
        }

        .service-card:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-2px);
        }

        .service-icon {
            margin-bottom: 1.25rem;
        }

        .service-card h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 1rem;
            color: var(--color-card);
        }

        .service-card p {
            line-height: 1.8;
            opacity: 0.8;
            margin-bottom: 1rem;
        }

        .service-examples {
            font-size: 0.9rem;
            opacity: 0.6;
            font-style: italic;
        }

        .services-industries {
            margin-bottom: 3rem;
            padding: 2rem;
            background-color: rgba(255, 255, 255, 0.04);
            border-radius: 0.5rem;
            border-left: 4px solid var(--color-accent-teal);
        }

        .services-industries p {
            line-height: 1.8;
            opacity: 0.85;
        }

        .services-industries strong {
            color: var(--color-accent-teal);
            font-weight: 600;
        }

        .services-cta {
            text-align: center;
            padding-top: 1rem;
        }

        .services-cta p {
            opacity: 0.7;
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }

        .btn-services {
            display: inline-block;
            padding: 0.875rem 2rem;
            background-color: var(--color-accent-teal);
            color: var(--color-card);
            text-decoration: none;
            border-radius: 0.375rem;
            font-weight: 600;
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .btn-services:hover {
            background-color: #0e7490;
            transform: translateY(-1px);
        }

        /* Footer */
        footer {
            background-color: var(--color-dark);
            color: var(--color-card);
            padding: 4rem 2rem 2rem;
        }

        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            margin-bottom: 2rem;
        }

        .footer-section h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer-text {
            opacity: 0.8;
            line-height: 1.8;
        }

        .footer-links {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
        }

        .footer-link {
            color: var(--color-accent-teal);
            text-decoration: none;
            transition: opacity 0.3s ease;
        }

        .footer-link:hover {
            opacity: 0.8;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 2rem;
            text-align: center;
            opacity: 0.7;
        }

        /* Responsive */
        @media (max-width: 768px) {
            .experience-columns {
                grid-template-columns: 1fr;
                gap: 3rem;
            }

            .services-grid {
                grid-template-columns: 1fr;
            }

            .hamburger {
                display: flex;
            }

            nav {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background-color: var(--color-card);
                flex-direction: column;
                padding: 1rem;
                gap: 0.5rem;
                box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            }

            nav.active {
                display: flex;
            }

            nav.active a {
                color: var(--color-text-heading) !important;
            }

            .hero-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .hero {
                padding: 100px 1rem 3rem;
            }

            .hero-headline {
                font-size: 2rem;
            }

            .hero-image {
                order: -1;
            }

            .pillars-grid {
                grid-template-columns: repeat(2, 1fr) !important;
            }

            .books-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
            }

            .footer-container {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .stats-content {
                flex-direction: column;
                gap: 1rem;
            }
        }

        @media (max-width: 480px) {
            .pillars-grid {
                grid-template-columns: 1fr !important;
            }

            .books-grid {
                grid-template-columns: 1fr;
            }

            .hero-headline {
                font-size: 1.5rem;
            }

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

            .cards-grid {
                grid-template-columns: 1fr;
            }

            .hero-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
                text-align: center;
            }

            header {
                padding: 1rem;
            }

            nav {
                top: 50px;
            }
        }