body {
    background-image: url('/images/background_a.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
    background-position: center center;
    margin: 0;
    padding: 0;
    height: 100%;
}

.container {
    background-color: rgba(255, 255, 255, 0.8);
    padding: 10px;
    border-radius: 10px;
    margin-top: 50px;
    max-width: 600px;
}

.overlay-container {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.success-message-box {
    background-color: #28a745;
    color: #fff;
    border-radius: 5px;
    padding: 10px 20px;
    box-shadow: 0px 0px 10px rgba(0, 0, 0, 0.3);
    text-align: center;
}