main.css

* {
  padding: 0;
  margin: 0;
  border: 0;
}

body {
  width: 100vw;
  height: 100vh;
}
body header {
  padding: 16px;
  text-align: center;
}
body main {
  padding: 16px;
  text-align: center;
}
body section:first-of-type ul {
  display: flex;
}
body section:first-of-type ul li {
  list-style: none;
  flex-grow: 1;
  padding: 16px;
}
body section:first-of-type ul li:hover {
  cursor: pointer;
  border: 0.5px solid #f00;
}
body section:first-of-type ul li p {
  text-align: center;
}
body .muestra .results {
  display: grid;
  grid-template: [row1-start] repeat(5, 1fr) [row1-end]/repeat(3, 1fr);
}
body .filtrado div:first-of-type {
  display: flex;
  gap: 8px;
}
body .filtrado .resultsFilter {
  display: grid;
  grid-template: [row1-start] repeat(5, 1fr) [row1-end]/repeat(3, 1fr);
}