.startup-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: black;
    display: flex;
    justify-content: center;
    align-items: center;
}

.startup-screen img {
    width: 300px;
    height: auto;
    animation: fade-in 2s ease-in-out;
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 1; }
}