* {
    /* background-color: blue; */
    margin: 0;
    padding:0;
    box-sizing: border-box;
}
body > header {
    display: flex;
    justify-content: space-between;
    padding: 2.5%;
    border-bottom: 1px solid black;
    align-items: center;
}
body > header > .img-container {
    max-height: 50px;
    flex-basis: 20%;
}
body > header > .img-container > img {
    height: 50%;
    width: 60%;
}
header > .main-links a{
    border: 1px solid black;
    border-radius: 5px;
    display: inline-block;
    padding: 1% 5%;
    text-decoration: none;
    font-size: bold;
    font-family: 'Trebuchet MS', 'Lucida Sans Unicode', 'Lucida Grande', 'Lucida Sans', Arial, sans-serif;
}
header a:focus,
header a:active {
    box-shadow: 1px 2px 5px 4px lightseagreen;
}