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

        body {
            min-height: 100vh;
            font-family: 'Segoe UI', Arial, sans-serif;
            background-color: #ffffff; /* Clean, crisp pure white background */
            color: #1a1a3a;            /* Dark premium navy text for high contrast */
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        /* 2. Responsive Multi-Link Navbar Layout */
        .navbar {
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 50px;
            background: rgb(1, 1, 34); /* Your signature dark premium navy */
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
            position: sticky;
            top: 0;
            z-index: 100;
        }

        .logo {
            color: #ffffff;
            font-size: 1.6rem;
            font-weight: bold;
            letter-spacing: 1.5px;
            text-transform: uppercase;
            text-decoration: none;
        }

        .logo span {
            color: #00ffcc; /* Neon accent highlight for brand consistency */
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 25px;
            align-items: center;
        }

        .nav-links a {
            color: #ffffff;
            text-decoration: none;
            font-size: 1rem;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        /* Hover interactive states across individual navbar links */
        .nav-links a:hover {
            color: #00ffcc;
            background: rgba(255, 255, 255, 0.05);
        }

        /* Special highlights for active or specific tabs if needed */
        .nav-links .special-link {
            border: 1px solid #00ffcc;
            color: #00ffcc;
        }

        .nav-links .special-link:hover {
            background-color: #00ffcc;
            color: rgb(1, 1, 34);
        }

        /* 3. Central Grid Showcase Layout */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            max-width: 1200px;
            width: 100%;
            margin: 0 auto;
            padding: 40px 20px;
            text-align: center;
        }

        .hero-section h1 {
            font-size: 2.8rem;
            color: rgb(1, 1, 34);
            margin-bottom: 10px;
            font-weight: 800;
        }

        .hero-subtitle {
            font-size: 1.2rem;
            color: #555575;
            max-width: 700px;
            margin: 0 auto 40px auto;
            line-height: 1.6;
        }

        /* 🎯 RESPONSIVE TUTORIAL CARDS GRID CONTAINER */
        .academy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 25px;
            width: 100%;
            margin-bottom: 30px;
        }

        /* The modular card structural classes */
        .course-card {
            background: #ffffff;
            border: 2px solid #e1e1e9;
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            align-items: center;
            min-height: 250px;
        }

        /* Hover animation elevation for the course items */
        .course-card:hover {
            transform: translateY(-5px);
            border-color: rgb(1, 1, 34);
            box-shadow: 0 10px 20px rgba(1, 1, 34, 0.08);
        }

        .course-icon {
            font-size: 3rem;
            margin-bottom: 15px;
        }

        .course-card h3 {
            font-size: 1.4rem;
            color: rgb(1, 1, 34);
            margin-bottom: 10px;
        }

        .course-card p {
            font-size: 0.95rem;
            color: #666680;
            line-height: 1.5;
            margin-bottom: 20px;
        }

        /* Modular button layouts mirroring your classic .btn properties */
        .card-btn {
            background-color: rgb(1, 1, 34);
            color: #00ffcc;
            text-decoration: none;
            padding: 10px 20px;
            font-weight: 600;
            font-size: 1rem;
            border-radius: 8px;
            border: 1px solid #00ffcc;
            width: 100%;
            transition: all 0.3s ease;
            text-align: center;
        }

        .course-card:hover .card-btn {
            background-color: #00ffcc;
            color: rgb(1, 1, 34);
            box-shadow: 0 0 10px rgba(0, 255, 204, 0.5);
        }

        /* 4. Modular Footer Settings */
        footer {
            width: 100%;
            text-align: center;
            padding: 20px;
            background-color: #f8f9fa;
            border-top: 1px solid #eeeeee;
            font-size: 0.9rem;
            color: #777797;
        }

        footer a {
            color: rgb(1, 1, 34);
            text-decoration: none;
            font-weight: 600;
            margin-left: 5px;
        }

        footer a:hover {
            text-decoration: underline;
        }

        /* 5. Mobile Layout Breakpoint Settings */
        @media (max-width: 768px) {
            .navbar {
                padding: 15px 20px;
                flex-direction: column;
                gap: 15px;
            }
            .nav-links {
                width: 100%;
                justify-content: center;
                flex-wrap: wrap;
                gap: 10px;
            }
            .nav-links a {
                font-size: 0.95rem;
                padding: 6px 10px;
            }
            .hero-section h1 {
                font-size: 2.2rem;
            }
        }