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

        body {
            font-family: 'Arial', sans-serif;
            line-height: 1.6;
            color: #333;
        }

        /* Top Bar */
        .top-bar {
            background: #1e3a8a;
            color: white;
            padding: 10px 0;
            font-size: 0.9rem;
        }

        .top-bar .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
        }

        /* Header */
        header {
            background: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 15px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo {
            font-size: 1.5rem;
            font-weight: bold;
            color: #1e3a8a;
        }

        nav ul {
            display: flex;
            list-style: none;
            gap: 30px;
        }

        nav a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            transition: color 0.3s;
        }

        nav a:hover {
            color: #1e3a8a;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 5px;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: #333;
            transition: 0.3s;
        }

        /* Page Title */
        .page-title {
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            color: white;
            padding: 30px 20px;
            text-align: center;
        }

        .page-title h1 {
            font-size: 2.5rem;
            margin-bottom: 10px;
        }

        /* Courses Grid */
        .courses-section {
            max-width: 1200px;
            margin: 30px auto;
            padding: 0 20px;
        }

        .courses-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 30px;
        }

        .course-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s, box-shadow 0.3s;
        }

        .course-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.15);
        }

        .course-image {
            width: 100%;
            height: 200px;
            background: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
            font-weight: bold;
            text-align: center;
            padding: 20px;
        }

        .course-badge {
            background: #10b981;
            color: white;
            padding: 5px 15px;
            font-size: 0.85rem;
            display: inline-block;
            margin: 15px 15px 0;
            border-radius: 4px;
        }

        .course-content {
            padding: 20px;
        }

        .course-title {
            font-size: 1.1rem;
            font-weight: bold;
            margin-bottom: 15px;
            color: #1e3a8a;
            min-height: 50px;
        }

        .course-rating {
            color: #fbbf24;
            margin-bottom: 15px;
        }

        .course-price {
            font-size: 1.5rem;
            font-weight: bold;
            color: #10b981;
            margin-bottom: 15px;
        }

        .btn-add-cart {
            width: 100%;
            padding: 12px;
            background: #1e3a8a;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s;
        }

        .btn-add-cart:hover {
            background: #1e40af;
        }
        .btn-whatsapp {
            width: 100%;
            padding: 12px;
            background: #25D366;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
            transition: background 0.3s, transform 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            text-decoration: none;
        }

        .btn-whatsapp:hover {
            background: #1fb855;
            transform: scale(1.05);
        }

        /* Footer */
        footer {
            background: #1f2937;
            color: white;
            padding: 60px 20px 20px;
        }

        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-section h3 {
            margin-bottom: 20px;
            color: #3b82f6;
        }

        .footer-section ul {
            list-style: none;
        }

        .footer-section ul li {
            margin-bottom: 10px;
        }

        .footer-section a {
            color: #d1d5db;
            text-decoration: none;
            transition: color 0.3s;
        }

        .footer-section a:hover {
            color: #3b82f6;
        }

        .payment-methods {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }

        .payment-icon {
            width: 50px;
            height: 30px;
            background: white;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            font-weight: bold;
            color: #333;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #374151;
            color: #9ca3af;
        }
        
        /* Responsive */
        @media (max-width: 768px) {
            .top-bar .container {
                font-size: 0.8rem;
                text-align: center;
                justify-content: center;
            }

            nav ul {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                padding: 20px;
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            }

            nav ul.active {
                display: flex;
            }

            .menu-toggle {
                display: flex;
            }

            .menu-toggle.active span:nth-child(1) {
                transform: rotate(45deg) translate(5px, 5px);
            }

            .menu-toggle.active span:nth-child(2) {
                opacity: 0;
            }

            .menu-toggle.active span:nth-child(3) {
                transform: rotate(-45deg) translate(7px, -6px);
            }

            .page-title h1 {
                font-size: 1.8rem;
            }

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

            .footer-content {
                grid-template-columns: 1fr;
            }
        }