.futurepay-container {
    max-width: 400px;
    margin: 20px auto;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.futurepay-loading {
    padding: 20px;
    color: #666;
    font-size: 16px;
}

.futurepay-error {
    padding: 20px;
    color: #f44336;
    background-color: #ffebee;
    border-radius: 4px;
    font-size: 14px;
    margin: 10px 0;
}

.futurepay-button-wrapper {
    padding: 10px 0;
}

.futurepay-btn {
    display: inline-block;
    padding: 15px 40px;
    background-color: #4CAF50;
    color: white !important;
    text-decoration: none !important;
    border-radius: 5px;
    font-size: 18px;
    font-weight: bold;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.futurepay-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    opacity: 0.9;
}

.futurepay-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 3px rgba(0,0,0,0.2);
}

/* Responsive design */
@media (max-width: 480px) {
    .futurepay-container {
        max-width: 100%;
        padding: 0 15px;
    }
    
    .futurepay-btn {
        width: 100%;
        padding: 12px 30px;
        font-size: 16px;
    }
}