#pg-container {
    position: relative;
    display: block;
    width: 100vw; 
    height: 100vh; 
    margin: 0; 
    padding: 0;
}
.box { 
    display: inline-block; 
    position: absolute; 
    top: 50%;
    left: 50%; 
    transform: translate(-50%, -50%); 
    background-color: #888888;
    border-radius: 0.5rem; 
    box-shadow: 2px 2px 5px #aaa; 
    border: 1px solid #999; 
}
.box-title { 
    width: auto; 
    height: 1.1em; 
    font-size: 1.5em;
    text-align: center; 
    background-color: #8080af; 
    color: #ffffff;
    border-radius: calc(0.5rem - 1px) calc(0.5rem - 1px) 0 0; 
    border: none; 
    padding: .1em 1rem; 
    margin: 0; 
    display: block; 
}
.box-body { 
    width: auto;
    font-size: 1em; 
    background-color: #f0f0ff; 
    color: var(--box-body-color);
    border-radius: 0 0 calc(0.5rem - 1px) calc(0.5rem - 1px); 
    border: none; 
    padding: .1em 1rem; 
    margin: 0; 
    display: block; 
}
#login-msg {
    color: #800;
}