/* CSS Variables */
        :root {
            --primary-color: #00d4ff;
            --primary-dark: #00a0c2;
            --background-color: #1a1a1a;
            --surface-color: #262626;
            --surface-light: #333333;
            --text-main: #e5e2e1;
            --text-muted: #bbc9cf;
            --white: #ffffff;
            --black: #000000;
            --success: #28a745;
            --warning: #ffc107;
            --danger: #dc3545;
            
            --heading-font: 'Oswald', sans-serif;
            --body-font: 'Roboto', sans-serif;
            
            --container-max-width: 75rem; /* 1200px */
            --nav-height: 5rem;
        }

        /* Reset & Base Styles */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--background-color);
            color: var(--text-main);
            font-family: var(--body-font);
            line-height: 1.6;
        }

        h1, h2, h3, h4 {
            font-family: var(--heading-font);
            text-transform: uppercase;
            letter-spacing: 0.0625rem;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }

        img {
            max-width: 100%;
            display: block;
        }

        .container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        /* Navigation */
        nav {
            background-color: rgba(26, 26, 26, 0.98);
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 2.5rem;
            height: var(--nav-height);
            position: sticky;
            top: 0;
            z-index: 1000;
            border-bottom: 0.0625rem solid var(--surface-light);
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            font-style: italic;
            font-family: var(--heading-font);
        }

        .logo span {
            color: var(--primary-color);
        }

        .nav-links {
            display: flex;
            gap: 1.875rem;
            list-style: none;
        }

        .nav-links a {
            font-weight: 400;
            font-family: var(--heading-font);
            text-transform: uppercase;
            letter-spacing: 0.05rem;
        }

        .nav-links a:hover {
            color: var(--primary-color);
        }

        .nav-links a.active {
            color: var(--primary-color);
            border-bottom: 0.125rem solid var(--primary-color);
            padding-bottom: 0.25rem;
        }

        .btn-join {
            background-color: var(--primary-color);
            color: var(--black);
            padding: 0.625rem 1.25rem;
            font-weight: 700;
            border-radius: 0.25rem;
            font-family: var(--heading-font);
            transition: background-color 0.3s ease;
        }

        .btn-join:hover {
            background-color: var(--white);
        }
        /* Hero Section */
        header {
            height: 80vh;
            background: linear-gradient(rgba(0,0,0,0.7), rgba(0,0,0,0.7)), 
                        url('https://images.unsplash.com/photo-1534438327276-14e5300c3a48?auto=format&fit=crop&q=80&w=1470') no-repeat center center/cover;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
        }

        .hero-content h1 {
            font-size: 5rem;
            margin-bottom: 0.625rem;
            font-style: italic;
        }

        .hero-content p {
            font-size: 1.5rem;
            color: var(--text-muted);
            margin-bottom: 1.875rem;
            text-transform: uppercase;
            letter-spacing: 0.3125rem;
        }

        /* Main Content Structure */
        main section {
            padding: 5rem 0;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 2.5rem;
            border-left: 0.3125rem solid var(--primary-color);
            padding-left: 1.25rem;
        }

        /* Grid System */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.875rem;
        }

        .card {
            background-color: var(--surface-color);
            border-radius: 0.5rem;
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .card:hover {
            transform: translateY(-0.625rem);
            box-shadow: 0 0.625rem 1.25rem rgba(0,0,0,0.5);
        }

        .card-img {
            height: 15.625rem;
            width: 100%;
            object-fit: cover;
        }

        .card-body {
            padding: 1.25rem;
        }

        .card-body h3 {
            margin-bottom: 0.625rem;
            color: var(--primary-color);
        }

        /* Market / Fuel Station */
        .product-price {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--primary-color);
            display: block;
            margin-top: 0.625rem;
        }

        .btn-cart {
            display: block;
            width: 100%;
            padding: 0.75rem;
            margin-top: 0.9375rem;
            background-color: transparent;
            border: 0.0625rem solid var(--primary-color);
            color: var(--primary-color);
            text-align: center;
            font-weight: 700;
            cursor: pointer;
            border-radius: 0.25rem;
            font-family: var(--heading-font);
            transition: all 0.3s ease;
        }

        .btn-cart:hover {
            background-color: var(--primary-color);
            color: var(--black);
        }

        /* Classes Table */
        .table-container {
            overflow-x: auto;
            margin-top: 1.25rem;
        }

        table {
            width: 100%;
            border-collapse: collapse;
            background-color: var(--surface-color);
        }

        caption {
            padding: 1.25rem;
            font-family: var(--heading-font);
            font-size: 1.2rem;
            background-color: var(--surface-light);
            color: var(--primary-color);
            text-transform: uppercase;
        }

        th, td {
            padding: 1.25rem;
            text-align: left;
            border-bottom: 0.0625rem solid #444;
        }

        th {
            background-color: #1f1f1f;
            color: var(--text-muted);
            text-transform: uppercase;
            font-size: 0.9rem;
        }

        /* Striped rows & hover */
        tbody tr:nth-child(even) {
            background-color: rgba(255, 255, 255, 0.03);
        }

        tbody tr:hover {
            background-color: rgba(0, 212, 255, 0.1);
        }
        /* Difficulty Badges */
        .badge {
            padding: 0.25rem 0.625rem;
            border-radius: 0.125rem;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }
        .badge-beginner { background-color: var(--success); color: white; }
        .badge-intermediate { background-color: var(--warning); color: black; }
        .badge-advanced { background-color: var(--danger); color: white; }

        /* Membership Section */
        .membership-grid {
            display: flex;
            gap: 1.875rem;
            flex-wrap: wrap;
        }

        .plan-card {
            flex: 1;
            min-width: 18.75rem;
            background-color: var(--surface-color);
            padding: 2.5rem;
            border-radius: 0.5rem;
            text-align: center;
            border: 0.0625rem solid transparent;
            transition: border-color 0.3s ease;
        }

        .plan-card.featured {
            border-color: var(--primary-color);
            transform: scale(1.05);
            background-color: #2a2a2a;
        }

        .plan-card h3 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }

        .plan-price {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1.5rem;
        }

        .plan-price span {
            font-size: 1rem;
            color: var(--text-muted);
        }

        .plan-features {
            list-style: none;
            margin-bottom: 2rem;
            color: var(--text-muted);
        }

        .plan-features li {
            margin-bottom: 0.5rem;
        }

        /* Trainers & Contact Placeholders */
        .simple-link-section {
            display: flex;
            gap: 2rem;
            justify-content: center;
            padding: 2rem 0;
            border-top: 1px solid var(--surface-light);
        }

        .simple-link-section a {
            color: var(--primary-color);
            text-decoration: underline;
        }

        /* Footer */
        footer {
            background-color: #0d0d0d;
            padding: 3.75rem 0 1.875rem;
            border-top: 0.125rem solid var(--primary-color);
        }

        .footer-grid {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        .footer-col {
            flex: 1;
            min-width: 15.625rem;
        }

        .footer-col h4 {
            margin-bottom: 1.25rem;
            color: var(--primary-color);
        }

        .footer-col p {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 0.625rem;
        }

        .copyright {
            text-align: center;
            padding-top: 1.875rem;
            border-top: 0.0625rem solid #222;
            color: #555;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.125rem;
        }

        /* Responsive Design */
        /* Tablet (768px-1023px) */
        @media (min-width: 48rem) and (max-width: 63.9375rem) {
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-content h1 {
                font-size: 4rem;
            }
            .plan-card.featured {
                transform: scale(1);
            }
        }
        /* Mobile (<768px) */
        @media (max-width: 47.9375rem) {
            nav {
                padding: 0 1.25rem;
            }
            .nav-links {
                display: none;
            }
            .hero-content h1 {
                font-size: 3rem;
            }
            .hero-content p {
                font-size: 1rem;
                letter-spacing: 0.15rem;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .section-title {
                font-size: 2rem;
            }
            .footer-grid {
                flex-direction: column;
            }
            .membership-grid {
                flex-direction: column;
            }
            .plan-card.featured {
                transform: scale(1);
            }
        }