Eviter des bordures blanches trop larges sur écran < 480px
https://git.spip.net/spip-contrib-squelettes/html5up_editorial/src/commit/12dad869ebcaf31f04c20581d4f4a46954ac5210/css/theme.scss#L214
```
#main > .inner > section {
padding-left:2rem;
padding-right:2rem;
}
```
```
#main > .inner > section {
padding-left:0;
padding-right:0;
}
```
issue