html,
body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

header {
    padding: 6px;
}

main {
    position: absolute;
    height: 100svh;
    width: 100vw;
    min-height: clamp(100svh, 25rem, 100vh);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

main .logo {
    display: block;
    margin-left: auto;
    margin-right: auto;
    width: 70%;
    max-width: 20rem;
}

main .slogan {
    margin-top: 20px;
    margin-bottom: 80px;
    font-style: italic;
    display: flex;
    align-items: center;
    column-gap: 12px;
    opacity: 0.7;
}

main .slogan img {
    width: 22px;
    height: 22px;
    margin-right: 10px;
    margin: 0;
}

footer {
    display: flex;
    align-items: center;
    justify-content: center;

    position: absolute; /* use "fixed" for a sticky footer */
    left: 0;
    bottom: 0;
    width: 100vw;
    height: 30px;

    text-align: center;
    background-color: rgb(4, 43, 73);
    color: #ffffff85;

    font-size: 0.8em;
    font-style: italic;
    font-weight: lighter;
}

footer span {
    margin-bottom: 3px;
    padding-left: 6px;
    padding-right: 6px;
}