* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 40px 20px;
            overflow-x: hidden;
            position: relative;
            background: #0f172a; /* Dark blue background */
            animation: bgcolor 30s infinite alternate;
        }

        /* Color-changing background animation */
        @keyframes bgcolor {
            0% { background-color: #0f0c29; }
            30% { background-color: #1a1a40; }
            60% { background-color: #1d2d50; }
            90% { background-color: #133b5c; }
            100% { background-color: #1e3d59; }
        }
        
        /* Coin container for background animation */
        .coin-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            z-index: -1;
            overflow: hidden;
        }
        
        /* Floating coins */
        .coin {
            position: absolute;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            box-shadow: 0 0 15px rgba(255, 215, 0, 0.5);
            opacity: 0.7;
            animation: float 15s infinite linear;
            transform-origin: center;
        }
        
        .coin:before {
            position: absolute;
            font-size: 70%;
            font-weight: 900;
        }
        
        /* Different coin types */
        .bitcoin-coin { 
            background: linear-gradient(135deg, #f7931a, #ffd166);
            color: #8a6700;
        }
        .bitcoin-coin:before { content: "₿"; }
        
        .ethereum-coin { 
            background: linear-gradient(135deg, #8a2be2, #627eea);
            color: #4d1e99;
        }
        .ethereum-coin:before { content: "Ξ"; }
        
        .dollar-coin { 
            background: linear-gradient(135deg, #c0c9d2, #e9eff5);
            color: #7f8c8d;
        }
        .dollar-coin:before { content: "$"; }
        
        .euro-coin { 
            background: linear-gradient(135deg, #0066ff, #4cc9f0);
            color: #003d99;
        }
        .euro-coin:before { content: "€"; }
        
        /* Floating animation */
        @keyframes float {
            0% {
                transform: translateY(100vh) translateX(0) rotate(0deg);
            }
            100% {
                transform: translateY(-100px) translateX(calc(100vw - 100px)) rotate(360deg);
            }
        }
        
        /* Coin particles */
        .coin-particle {
            position: absolute;
            border-radius: 50%;
            background: radial-gradient(circle, #ffd700, #ff9900);
            box-shadow: 0 0 10px rgba(255, 215, 0, 0.8);
            opacity: 0.8;
        }
        
        /* Header styling */
        header {
            text-align: center;
            margin-bottom: 50px;
            max-width: 100%;
            position: relative;
            z-index: 10;
            background: rgba(15, 23, 42, 0.8);
            padding: 20px;
            border-radius: 20px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(56, 178, 172, 0.3);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
        }
        
        h1 {
            font-size: 2.8rem;
            background: linear-gradient(45deg, #4cc9f0, #f72585);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 15px;
            letter-spacing: 1px;
            text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
        }
        
        .subtitle {
            color: #a0a0c0;
            font-size: 1.2rem;
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        
        /* Card styling */
        .cards-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 30px;
            max-width: 1200px;
            width: 100%;
            position: relative;
            z-index: 10;
        }
        
        .card {
            background: rgba(25, 25, 50, 0.8);
            border-radius: 20px;
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.3);
            width: 350px;
            overflow: hidden;
            transition: all 0.4s ease;
            position: relative;
            display: flex;
            flex-direction: column;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(76, 201, 240, 0.2);
        }
        
        .card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(76, 201, 240, 0.3);
        }
        
        .card-header {
            padding: 30px 30px 20px;
            text-align: center;
            background: rgba(15, 23, 42, 0.6);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .logo-container {
            width: 100px;
            height: 100px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.5rem;
            box-shadow: 0 0 20px rgba(76, 201, 240, 0.5);
            background: linear-gradient(135deg, #4cc9f0, #4361ee);
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        .logo-container:after {
            content: "";
            position: absolute;
            width: 150%;
            height: 150%;
            background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, transparent 70%);
            animation: shine 3s infinite;
        }
        
        @keyframes shine {
            0% { transform: translate(-50%, -50%) rotate(0deg); }
            100% { transform: translate(-50%, -50%) rotate(360deg); }
        }
        
        .product-name {
            font-size: 1.8rem;
            font-weight: 700;
            color: white;
            margin-bottom: 10px;
            text-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
        }
        
        .product-tagline {
            color: #a0a0c0;
            font-size: 1rem;
            font-weight: 500;
        }
        
        .card-body {
            padding: 30px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .features {
            margin-bottom: 25px;
        }
        
        .features li {
            list-style: none;
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
        }
        
        .features li:last-child {
            border-bottom: none;
        }
        
        .features li i {
            color: #4cc9f0;
            margin-right: 10px;
            width: 20px;
            text-shadow: 0 0 8px rgba(76, 201, 240, 0.5);
        }
        
        .price {
            text-align: center;
            margin: auto 0 25px;
        }
        
        .price-tag {
            font-size: 2.5rem;
            font-weight: 700;
            color: white;
            margin-bottom: 5px;
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
        }
        
        .price-note {
            color: #a0a0c0;
            font-size: 0.9rem;
        }
        
        .card-footer {
            padding: 0 30px 30px;
            text-align: center;
        }
        
        .buy-btn {
            display: inline-block;
            width: 100%;
            padding: 16px;
            background: linear-gradient(to right, #4cc9f0, #4361ee);
            color: white;
            border: none;
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 5px 15px rgba(76, 201, 240, 0.4);
            position: relative;
            overflow: hidden;
            z-index: 2;
        }
        
        .buy-btn:hover {
            background: linear-gradient(to right, #3aa8d0, #3a55e0);
            transform: translateY(-3px);
            box-shadow: 0 8px 20px rgba(76, 201, 240, 0.6);
        }
        
        .buy-btn:active {
            transform: translateY(1px);
        }
        
        .badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: linear-gradient(to right, #f72585, #b5179e);
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            box-shadow: 0 3px 10px rgba(247, 37, 133, 0.3);
            z-index: 3;
        }
        
        /* Testimonials section */
        .testimonials {
            margin-top: 60px;
            max-width: 800px;
            text-align: center;
            padding: 30px;
            background: rgba(25, 25, 50, 0.8);
            border-radius: 20px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(76, 201, 240, 0.2);
            position: relative;
            z-index: 10;
        }
        
        .testimonials h2 {
            color: white;
            margin-bottom: 25px;
            font-size: 1.8rem;
        }
        
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }
        
        .testimonial {
            background: rgba(15, 23, 42, 0.6);
            padding: 20px;
            border-radius: 15px;
            text-align: left;
            border: 1px solid rgba(76, 201, 240, 0.1);
        }
        
        .testimonial p {
            color: #e2e8f0;
            font-style: italic;
            line-height: 1.6;
            margin-bottom: 15px;
        }
        
        .client {
            display: flex;
            align-items: center;
        }
        
        .client img {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            margin-right: 10px;
            object-fit: cover;
            border: 2px solid #4cc9f0;
        }
        
        .client-info {
            font-size: 0.9rem;
        }
        
        .client-name {
            font-weight: 600;
            color: white;
        }
        
        .client-title {
            color: #a0a0c0;
            font-size: 0.8rem;
        }
        
        @media (max-width: 768px) {
            .cards-container {
                flex-direction: column;
                align-items: center;
            }
            
            .card {
                width: 100%;
                max-width: 400px;
            }
            
            h1 {
                font-size: 2.2rem;
            }
        }

        a {
            text-decoration: none;
        }
        li{
            color: white;
        }