body {
    margin: 0;
    padding: 0;
    background: url('img/background.jpg') no-repeat center center fixed;
    background-size: cover;
    font-family: sans-serif;
    height: 100vh;
    position: relative;
}

.overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    text-align: center;
    color: white;
}

.logo {
    max-width: 320px;
    margin-bottom: 20px;
}

.tagline {
    font-size: 2em;
    font-style: italic;
}

.footer {
    position: absolute;
    bottom: 10px;
    width: 100%;
    text-align: center;
    font-size: 0.75em;
    opacity: 0.5;
}

.footer a {
    color: white;
    text-decoration: none;
}