#header-inner {
    transition:
            border-radius 260ms cubic-bezier(.4,0,.2,1),
            padding 260ms cubic-bezier(.4,0,.2,1),
            max-width 260ms cubic-bezier(.4,0,.2,1),
            box-shadow 260ms cubic-bezier(.4,0,.2,1),
            background-color 260ms cubic-bezier(.4,0,.2,1),
            transform 260ms cubic-bezier(.4,0,.2,1);
    will-change: border-radius, padding, max-width, box-shadow, background-color, transform;
}