{ margin: 0; padding: 0; box-sizing: border-box; font-family: 'Verdana', sans-serif; }
        body { background: radial-gradient(circle, #ff7e5f, #feb47b); display: flex; justify-content: center; align-items: center; height: 100vh; overflow: hidden; }
        .container { text-align: center; background: rgba(255, 255, 255, 0.95); padding: 50px 30px; border-radius: 15px; box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3); max-width: 400px; animation: zoomIn 1s ease-in-out; backdrop-filter: blur(5px); }
        h1 { font-size: 2.5rem; color: #333; margin-bottom: 15px; animation: bounceIn 1s forwards; text-shadow: 0 2px 3px rgba(0, 0, 0, 0.1); }
        h1::after { content: ''; display: block; height: 4px; width: 100px; background: #ffcc00; margin: 10px auto; border-radius: 50px; animation: pulse 1.5s infinite; }
        p { font-size: 1.1rem; color: #555; margin-bottom: 20px; line-height: 1.5; }
        .btn {
            background: linear-gradient(90deg, #6a11cb 0%, #2575fc 100%);
            color: white;
            padding: 12px 25px;
            border: none;
            border-radius: 30px;
            cursor: pointer;
            font-size: 1.2rem;
            box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
            transition: transform 0.2s ease, box-shadow 0.3s ease;
        }
        .btn:hover {
            background: linear-gradient(90deg, #2575fc 0%, #6a11cb 100%);
            transform: translateY(-3px);
            box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
        }
        @keyframes zoomIn {
            0% { opacity: 0; transform: scale(0.8); }
            100% { opacity: 1; transform: scale(1); }
        }
        @keyframes bounceIn {
            0% { opacity: 0; transform: translateY(-30px); }
            100% { opacity: 1; transform: translateY(0); }
        }
        @keyframes pulse {
            0%, 100% { transform: scale(1); }
            50% { transform: scale(1.1); }
        }
        .coins { position: absolute; top: 20px; right: 20px; width: 60px; animation: floatCoin 2s infinite ease-in-out; }
        @keyframes floatCoin {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-10px); }
        }
        .error-popup {
            background: #ff4444;
            color: white;
            padding: 15px 25px;
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 10px;
            box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
            opacity: 0;
            animation: showPopup 0.5s ease forwards, hidePopup 3.5s ease 3s forwards;
        }
        @keyframes showPopup {
            0% { opacity: 0; transform: translateY(-20px); }
            100% { opacity: 1; transform: translateY(0); }
        }
        @keyframes hidePopup {
            0% { opacity: 1; transform: translateY(0); }
            100% { opacity: 0; transform: translateY(-20px); }
        }