/* RESET BÁSICO */
* {
  box-sizing: border-box;
}

html {
  font-size: 100%;
}

/* global styles */

body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.65;
  color: #1a1a1a;
  background-color: #ffffff;
}

/* CONTENEDOR DE LECTURA */
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem 1rem;
}

/* ENCABEZADO */
header {
  border-bottom: 1px solid #e5e5e5;
  padding: 1rem;
}

header h1 {
  font-size: 1.4rem;
  margin: 0;
}

header a {
  text-decoration: none;
  color: #0b3c5d;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  margin-right: 1rem;
  font-size: 0.95rem;
  color: #0b3c5d;
}

/* TÍTULOS */
h1 {
  font-size: 1.8rem;
  margin-top: 0;
}

h2 {
  font-size: 1.4rem;
  margin-top: 2rem;
}

h3 {
  font-size: 1.1rem;
  margin-top: 1.5rem;
}

/* TEXTO */
p {
  margin: 1rem 0;
}

ul {
  margin: 1rem 0 1rem 1.2rem;
}

/* LINKS */
a {
  color: #0b3c5d;
}

a:hover {
  text-decoration: underline;
}

/* FOOTER */
footer {
  border-top: 1px solid #e5e5e5;
  padding: 1rem;
  font-size: 0.85rem;
  color: #555;
  text-align: center;
  margin: 0;
}

/* OTROS */

img {
  max-width: 100%;
  height: auto;
}

nav a[aria-current="page"] {
  font-weight: 600;
  text-decoration: underline;
}

/* ACCESIBILIDAD */
:focus {
  outline: 3px solid #ffbf47;
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: -999px;
  top: auto;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: #fff;
  padding: 0.5rem;
  border: 2px solid #000;
}