*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, sans-serif;
  line-height: 1.6;
}

main {
  max-width: 60rem;
  margin: 0 auto;
  padding: 1rem;
}

/* header */
header { border-bottom: 1px solid currentColor; padding: .5rem 1rem; }
header nav { max-width: 60rem; margin: 0 auto; }

/* portes d'entrée */
.portes { display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 1rem; margin-block: 2rem; }
.porte  { border: 1px solid currentColor; padding: 1rem; }

/* actualités */
.actualites { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 1rem; }
.actualite  { border-left: 3px solid currentColor; padding-left: 1rem; }

/* footer */
footer { border-top: 1px solid currentColor; padding: 1rem; margin-top: 2rem; font-size: .875rem; }

/* métadonnées fiche */
.meta-fiche { display: grid; grid-template-columns: max-content 1fr; gap: .25rem 1rem; font-size: .875rem; margin-bottom: 2rem; }