html, body {
    height: 100%;
    margin: 0;
    padding: 0;
    color: #fff;
    box-sizing: border-box;
}

html {
    /*text-shadow: 0 .05rem .1rem rgba(0, 0, 0, .5);*/
    /*box-shadow: inset 0 0 5rem rgba(0, 0, 0, .5);*/
    font-family: Calibri;
    background-image: url('../images/Airplane_Banner.jpg');
    background-size: cover;
    background-position: center;
}

    html:after {
        opacity: 0.9;
        content: "";
        position: absolute;
        left: 0;
        top: 0;
        z-index: -1;
        width: 100%;
        height: 100%;
        background: #044576;
    }

body {
    display: flex;
    text-align: center;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
}

img {
    max-width: 80%;
}

h1 {
    font-size: 2rem;
}

p {
    font-size: 1.3rem;
}

a {
    padding: 10px;
    margin: 10px;
    background-color: #ffd452;
    display: inline-block;
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
    color: #005596;
    border: 2px solid #fff;
}

    a span {
        margin: 6px auto;
        font-size: .8rem;
        display: block;
        color: #005596;
    }

@media (max-width: 768px) {
    a {
        width: 80%;
    }
}