body {
  display: flex; flex-direction: column; gap: 1rem;
  padding-top: 1rem;
  >figure {
    margin: 0 auto; padding: 0 1rem; max-width: 20rem;
  }
}
header {
  text-align: center; margin-bottom: 1rem;
  h1 { font-size: 2.5rem; color: var(--blue); margin: 1rem .5rem;}
}
details {
  margin: 0 1rem;
  summary {
    color: var(--black); background-color: var(--blue);
    padding: 0.5rem 1rem; border-radius: 0.5rem;
  }
  &[open] summary { border-radius: 0.5rem 0.5rem 0 0;}
  >div {
    padding: 2rem 1rem 1rem; border-radius: 0 0 .5rem .5rem;
    background-color: color-mix(in srgb, var(--dark-gray), var(--black) 50%);
    background-image: url("../img/grid-light.png"); background-size: 0.75rem 0.75rem;
  }
  figure {
    margin: 0; text-align: center;
    img { width: 80%; margin-bottom: 1rem;}
    figcaption { text-align: left; }
  }
  hr { margin: 2rem 0;}
}
footer {
  background-color: color-mix(in srgb, var(--dark-gray), var(--black) 50%);
  background-image: url("../img/grid-light.png"); background-size: 0.75rem 0.75rem;
  padding: 1rem; margin-top: 1rem;
}
/* Big mobile */
@media screen and (min-width: 25rem) {
  body { gap: 2rem; padding-top: 2rem;}
  body>figure { padding: 0 2rem; max-width: 25rem; }
  header h1 { font-size: 2.75rem; }
  details { margin: 0 2rem; >div { padding: 2rem; }}
  footer { padding: 2rem; margin-top: 2rem;}
}
/* Tablet */
@media screen and (min-width: 40rem) {
  body>figure { max-width: 28rem; }
  header h1 { font-size: 3rem; }
  details { width: 75%; max-width: 40rem;  margin: 0 auto; summary { padding: 1rem 1.5rem; }}
}
/* Desktop */
@media screen and (min-width: 67rem) {
  body>figure { max-width: 35rem; }
  header h1 { font-size: 3.5rem; }
  details { max-width: 50rem;  margin: 0 auto; }
}