body {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #234079;
    background-image: url('bg.jpg');
    background-size: cover;
    font-family: Arial, sans-serif;
}

.logo {
    max-width: min(700px, 90vw);
    max-height: min(700px, 80vh);
    width: auto;
    height: auto;
}