header,
footer {
    width: 100%;
    max-width: 100%;
    margin: 0;
    padding: 20px 0;
    box-sizing: border-box;
}
.header-inner,
.footer-inner {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    box-sizing: border-box;
}