website width

hey I have a difficult question first of all I would like all my website page to be full width 'auto' in general, until reach ''1440 width x 900 high''screen resulution so when visitor comes and see my website with this resulution 1440x900 or higher ...! the page automatically to be 1366px768px and to stay same for all screen resulution higher than 1440 width ... simple so from mobile until 1440x900px screen resolution to be auto the page of my website and if it goes more than 1440 to stay 1366px768px