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Here you can Sed posuere consectetur est at lobortis. Donec ullamcorper nulla non metus auctor fringilla. Maecenas sed diam eget risus varius blandit sit amet non magna. Donec id elit non mi porta gravida at eget metus. Praesent commodo cursus magna, vel scelerisque nisl consectetur et.

            
              body.grid
  header header
  main main
  aside aside
  section.e1 section 1
  section.e2 section 2
  section.e3 section 3
  nav nav
  footer footer
//
  |        OxxO
  |       X oo X
  |       X >< X
  |        XXXX~<>
  |      (..)(..)
            
          
!
            
              $sizeXS = 30rem
$sizeS = 70rem

.grid
  display grid // à déclarer d'emblé car l'ordre des éléments n'est pas forcément celui du html
  grid-template-rows repeat(2, auto) 1fr // permet à 'main' (3ème rangée) d'occuper tout l'espace disponible
  grid-gap 1rem

nav
  grid-area nav

header
  grid-area header

main
  grid-area main

aside
  grid-area aside

.e1
  grid-area e1

.e2
  grid-area e2

.e3
  grid-area e3

footer
  grid-area footer
  //grid-row row3-start / row3-end // footer colé en bas
  
@media (max-width $sizeXS)

  .grid
    grid-template-columns repeat(1, 1fr)
    grid-template-areas 'nav' 'header' 'main' 'aside' 'e1' 'e2' 'e3' 'footer'

@media (min-width $sizeXS) and (max-width $sizeS)

  .grid
    grid-template-columns repeat(2, 1fr)
    grid-template-areas 'nav nav' 'header header' 'main main' 'aside aside' 'e1 e2' 'e3 e3' 'footer footer'

@media (min-width $sizeS)

  .grid
    grid-template-columns repeat(3, 1fr)
    grid-template-areas 'nav nav nav' 'aside header header' 'aside main main' 'e1 e2 e3' 'footer footer footer'

// For demo:

html
body
  height 100%

body
  //min-height 100vh
  margin 0
  font-family Arial
  color #fff
  background-color #333

body *
  padding 1rem

nav
  background-color #8bc34a

header
  background-color Orange

main
  background-color #448aff

aside
  background-color #e91e63

footer
  background-color #f44336

.e1
  background-color #607d8b

.e2
  background-color #455a64

.e3
  background-color #37474f
            
          
!
            
              // @link https://caniuse.com/#feat=css-grid

// @link https://developer.mozilla.org/fr/docs/Web/CSS/grid-template-areas
// @link https://la-cascade.io/css-grid-layout-guide-complet/
// @link http://putaindecode.io/fr/articles/css/grilles/grid-layout/

// @note Choix des couleurs :
// @link https://www.materialpalette.com/
// @link https://www.materialui.co/
            
          
!
999px
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