Avalonia/samples/SingleProjectSandbox/Platforms/Browser/wwwroot/app.css

/* HTML styles for the splash screen */
.avalonia-splash {
    position: absolute;
    height: 100%;
    width: 100%;
    background: #1b2a4e;
    font-family: 'Nunito', sans-serif;
    justify-content: center;
    align-items: center;
    display: flex;
    pointer-events: none;
}

.avalonia-splash h2 {
    font-size: 1.5rem;
    color: #8b44ac;
}

.avalonia-splash a {
    color: white;
    text-decoration: none;
    font-size: 2.5rem;
    display: block;
}

.avalonia-splash img {
    opacity: 0.05;
    height: 35%;
    position: absolute;
    right: 3%;
    bottom: 3%;
}

.avalonia-splash.splash-close {
    transition: opacity 200ms, display 200ms;
    display: none;
    opacity: 0;
}