* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
}

.footer {
    display: -ms-flexbox;
    display: flex;
    -ms-flex-pack: center;
    justify-content: center;
}

.header-menu,
.footer-menu {
    margin: 0;
    padding: 0;
    list-style-type: none;
    display: flex;
}