header h1 {
    display: flex;
    align-items: center;
    background-color: #f6f8fa;
    border: 1px solid rgba(27,31,35,.15);
    font-size: 14px !important;
    min-height: 20px;
    padding: 9px 10px 10px !important;
    border-radius: 3px;
    position: absolute;
    top: 0;
    width: 890px;
}

main {
    width: 980px;
    padding: 45px;
    box-sizing: border-box;
    margin-left: auto !important;
    margin-right: auto !important;
}