/* Basic type and text */

body {
  font: 1.2em / 1.5 system-ui;
  width: clamp(480px, 70%, 1000px);
  margin: 0 auto;
}

h1 {
  font-size: 2em;
}

h2 {
  font-size: 1.5em;
}

a {
  color: red;
}

a:hover {
  text-decoration: none;
}

*{
    box-sizing: border-box;
}
/* Nav menu */

nav ul {
  display: flex;
  height: 80px;
  padding: 0;
  list-style-type: none;
  justify-content: space-between;
  gap: 10px;
}

nav li {
  flex: 1;
}
/*--Se añadió display block a los enlaces--*/
nav a {
  text-decoration: none;
  color: black;
  background-color: yellowgreen;
  text-align: center;
  padding: 10px;
  display: block;
}
/*--Se anadió el selector nav a:focus*/
a:hover, nav a:focus {
  background-color: goldenrod;
}

/* Intro and summary */
#summary, #introduction, footer{
   padding: 20px; 
}
.highlight {
  margin-top: 0;
  background-color: darkslategray;
  color: cornsilk;
}

#introduction.highlight a, #summary.highlight a{
    color: yellow;
}
.highlight a {
  color: purple;
}

h2 + p::first-line{
    font-weight: bold;
}

section:not(#summary, #introduction,) h2 + p::first-line{
    font-weight: bold;
}



/* Footer */

footer.highlight {
  margin-top: 20px;
  background-color: goldenrod;
  text-shadow: 1px 1px 1px black;
}