:root {
  --largeur-vignette: 300px;

  --charcoal: #264653ff;
  --persian-green: #2a9d8fff;
  --orange-yellow-crayola: #e9c46aff;
  --sandy-brown: #f4a261ff;
  --burnt-sienna: #e76f51ff;
}

body {
  background-color: var(--charcoal);
  font-family: sans-serif; 
  height: 100vh;
  margin: 0;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1rem;
}

header {
  text-align: center;
  font-size: xx-large;
  padding: 1rem;
  background-color: var(--persian-green);
  color: whitesmoke;
  font-variant-caps: all-small-caps;
}

main {
  margin: 0 5rem;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(var(--largeur-vignette), auto));
  gap: 2rem;
  justify-content: center;
}

vignette {
  box-sizing: border-box;
  min-width: var(--largeur-vignette);
  padding: 3rem 1rem;
  text-align: center;
  background: var(--sandy-brown);
  border-radius: 1rem;
  justify-self: center;
  align-self: center;
  color: whitesmoke;
}

vignette:hover {
  background: var(--burnt-sienna);
}

.titre {
  padding-top: 1rem;
  display: block;
  font-size: x-large;
  font-variant-caps: all-small-caps;
}

footer {
  font-size: smaller;
  text-align: center;
  background: var(--orange-yellow-crayola);
}

a {
  text-decoration: none;
  color: inherit;
}

a:hover {
  text-decoration: underline;
}

a:visited {
  color: inherit;
}