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

        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #2c5f41;
            min-height: 100vh;
        }

        .container {
            max-width: 1000px;
            margin: 20px auto 20px;
            background: rgba(255, 255, 255, 0.95);
            border-radius: 20px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .header {
            background: #2c3e50;
            color: white;
            padding: 50px 30px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .header::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="2" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
            animation: float 20s linear infinite;
        }

        @keyframes float {
            0% { transform: translate(0, 0) rotate(0deg); }
            100% { transform: translate(-50px, -50px) rotate(360deg); }
        }

        .header h1 {
            font-size: 3em;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
        }

        .header .subtitle {
            font-size: 1.3em;
            opacity: 0.9;
            position: relative;
            z-index: 1;
            margin-bottom: 10px;
        }

        .header .description {
            font-size: 1.1em;
            opacity: 0.8;
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.5;
        }

        .content {
            padding: 50px 30px;
        }

        .intro-section {
            background: linear-gradient(135deg, #f6f8ff 0%, #e8f0fe 100%);
            border-radius: 20px;
            padding: 40px;
            margin-bottom: 50px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            border: 2px solid #4ecdc4;
            text-align: center;
        }

        .intro-section h2 {
            color: #2c3e50;
            font-size: 2.2em;
            margin-bottom: 20px;
        }

        .intro-section p {
            color: #2d3748;
            font-size: 1.2em;
            line-height: 1.6;
            margin-bottom: 15px;
        }

        .intro-section ul {
            text-align: left;
            max-width: 600px;
            margin: 20px auto;
            color: #2d3748;
        }

        .intro-section li {
            margin: 10px 0;
            font-size: 1.1em;
            line-height: 1.5;
        }

        .topics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin: 40px 0;
        }

        .topic-card {
            background: white;
            border-radius: 20px;
            padding: 30px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            border-left: 6px solid #4ecdc4;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .topic-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #4ecdc4, #44a08d);
        }

        .topic-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
        }

        .topic-card:hover::before {
            background: linear-gradient(90deg, #4ecdc4, #44a08d);
        }

        .topic-number {
            background: linear-gradient(135deg, #ff6b6b, #ee5a24);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5em;
            font-weight: bold;
            margin-bottom: 20px;
            box-shadow: 0 4px 15px rgba(255, 107, 107, 0.3);
        }

        .topic-card h3 {
            color: #2c3e50;
            font-size: 1.6em;
            margin-bottom: 15px;
            font-weight: bold;
        }

        .topic-card p {
            color: #2d3748;
            line-height: 1.6;
            margin-bottom: 20px;
            font-size: 1.05em;
        }

        .topic-highlights {
            margin: 20px 0;
        }

        .topic-highlights h4 {
            color: #4ecdc4;
            font-size: 1.1em;
            margin-bottom: 10px;
        }

        .topic-highlights ul {
            margin-left: 20px;
            color: #2d3748;
        }

        .topic-highlights li {
            margin: 5px 0;
            font-size: 0.95em;
        }

/* Coming Soon Card */
.coming-soon-card {
    border-top-color: #2c5f41 !important;
    background: #f9fafb;
    cursor: default;
    position: relative;
    overflow: hidden;
}

.coming-soon-card:hover {
    transform: none;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.coming-soon-card h3 {
    color: #6b7280;
}

.coming-soon-card .topic-description {
    color: #2c3e50;
}

.coming-soon-card .topic-lesson-count {
    color: #9ca3af !important;
}

/* Optional: Add a "Coming Soon" badge */
.coming-soon-card::after {
    content: 'COMING SOON...';
    position: absolute;
    top: 35px;
    right: -35px;
    background: #fbbf24;
    color: white;
    padding: 5px 40px;
    font-size: .85em;
    font-weight: bold;
    transform: rotate(45deg);
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

        .difficulty-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            padding: 5px 12px;
            border-radius: 15px;
            font-size: 0.8em;
            font-weight: bold;
            text-transform: uppercase;
        }

        .difficulty-beginner {
            background: #d4edda;
            color: #155724;
        }

        .difficulty-intermediate {
            background: #fff3cd;
            color: #856404;
        }

        .difficulty-advanced {
            background: #f8d7da;
            color: #721c24;
        }

        .start-btn {
            background: linear-gradient(135deg, #4ecdc4, #44a08d);
            color: white;
            text-decoration: none;
            padding: 12px 25px;
            border-radius: 25px;
            font-size: 1em;
            font-weight: bold;
            display: inline-block;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(78, 205, 196, 0.3);
        }

        .start-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(78, 205, 196, 0.4);
            background: linear-gradient(135deg, #44a08d, #4ecdc4);
        }

        .progress-section {
            background: #34495e;
            color: white;
            padding: 40px;
            margin: 50px -30px;
            text-align: center;
        }

        .progress-section h2 {
            font-size: 2em;
            margin-bottom: 20px;
        }

        .progress-section p {
            font-size: 1.1em;
            opacity: 0.9;
            line-height: 1.6;
            max-width: 700px;
            margin: 0 auto 30px;
        }

        .progress-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .progress-item {
            background: rgba(255, 255, 255, 0.1);
            padding: 20px;
            border-radius: 15px;
            backdrop-filter: blur(10px);
        }

        .progress-item h4 {
            color: #4ecdc4;
            margin-bottom: 10px;
            font-size: 1.1em;
        }

        .progress-item p {
            font-size: 0.95em;
            opacity: 0.8;
            margin: 0;
        }

        /* Email Signup Styles */
        .signup-section {
            background: linear-gradient(135deg, #4a5d7a 0%, #2c3e50 100%);
            color: white;
            padding: 50px 30px;
            margin: 50px -30px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
            border-top: 4px solid #4ecdc4;
            box-shadow: 0 -10px 30px rgba(0, 0, 0, 0.1);
        }

        .signup-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 200%;
            height: 200%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1" fill="rgba(255,255,255,0.1)"/></svg>') repeat;
            animation: float 25s linear infinite reverse;
        }

        .signup-content {
            position: relative;
            z-index: 1;
            max-width: 600px;
            margin: 0 auto;
        }

        .signup-section h2 {
            font-size: 2.5em;
            margin-bottom: 15px;
            text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
        }

        .signup-section .signup-subtitle {
            font-size: 1.2em;
            margin-bottom: 30px;
            opacity: 0.95;
        }

        .signup-benefits {
            display: flex;
            justify-content: center;
            gap: 30px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .signup-benefit {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 1em;
        }

        .signup-benefit::before {
            content: '✓';
            background: rgba(78, 205, 196, 0.3);
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: #4ecdc4;
        }

        .signup-form {
            display: flex;
            gap: 10px;
            max-width: 500px;
            margin: 0 auto 20px;
        }

        .signup-input {
            flex: 1;
            padding: 15px 20px;
            border: none;
            border-radius: 50px;
            font-size: 1em;
            background: white;
            color: #333;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .signup-input:focus {
            outline: none;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
        }

        .signup-input::placeholder {
            color: #999;
        }

        .signup-button {
            padding: 15px 30px;
            background: linear-gradient(135deg, #4ecdc4, #44a08d);
            color: white;
            border: none;
            border-radius: 50px;
            font-size: 1em;
            font-weight: bold;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(78, 205, 196, 0.3);
            white-space: nowrap;
        }

        .signup-button:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(78, 205, 196, 0.4);
        }

        .signup-button:active {
            transform: translateY(0);
        }

        .signup-privacy {
            font-size: 0.85em;
            opacity: 0.8;
            margin-top: 15px;
        }

        .signup-privacy a {
            color: white;
            text-decoration: underline;
        }

        .signup-success {
            display: none;
            background: rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(10px);
            padding: 30px;
            border-radius: 15px;
            margin-top: 20px;
        }

        .signup-success.show {
            display: block;
            animation: slideUp 0.5s ease-out;
        }

        @keyframes slideUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .signup-success h3 {
            font-size: 1.5em;
            margin-bottom: 10px;
        }

       

        @media (max-width: 768px) {
            .signup-form {
                flex-direction: column;
            }

            .signup-button {
                width: 100%;
            }

            .signup-section {
                margin: 50px -20px 0;
                padding: 40px 20px;
            }

            .signup-section h2 {
                font-size: 1.8em;
            }

            .signup-benefits {
                flex-direction: column;
                align-items: center;
                gap: 15px;
            }
        }