Avalonia/samples/ControlCatalog.Browser/app.css

:root {
    --sat: env(safe-area-inset-top);
    --sar: env(safe-area-inset-right);
    --sab: env(safe-area-inset-bottom);
    --sal: env(safe-area-inset-left);
}

#out {
    height: 100vh;
    width: 100vw
}

#avalonia-splash {
    position: relative;
    height: 100%;
    width: 100%;
    color: whitesmoke;
    background: #171C2C;
    font-family: 'Nunito', sans-serif;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

#avalonia-splash a{
    color: whitesmoke;
    text-decoration: none;
}

.center {
    display: flex;
    justify-content: center;
    height: 250px;
}

.splash-close {
    animation: slide 0.5s linear 1s forwards;
}

@keyframes slide {
    0% {
        top: 0%;
    }

    50% {
        opacity: 80%;
    }

    100% {
        top: 100%;
        overflow: hidden;
        opacity: 0;
        display: none;
        visibility: collapse;
    }
}