body {
  font-family: Arial, Helvetica, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f3f4f9;
  color: #333;
}
header {
  background-color: #007bff;
  padding: 20px;
  text-align: center;
  color: white;
}
header h1 {
  margin-top: 0;
}
nav ul {
  /*quitar los puntos de la lista*/
  list-style: none;
  /*Poner en horizontal*/
  display: flex;
  justify-content: center;
  /*Espacio entre palabras*/
  gap: 20px;
}
nav a {
  color: white;
  text-decoration: none;
  /*Negritas*/
  font-weight: bold;
  padding: 5px 10px;
  transition: background-color 3s;
}
nav a:hover {
  background-color: red;
  border-radius: 50px;
}
/*Estilo al main section y aside*/
main {
  display: flex;
  max-width: 1200px;
  margin: 20px auto;
  padding: 0 20px;
  gap: 30px;
}

section {
  flex: 3;
  background-color: aqua;
  padding: 20px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 5);
  border-radius: 8px;
}
aside {
  flex: 1;
  background-color: cornflowerblue;
  padding: 20px;
  border-radius: 8px;
}
footer {
  background-color: #333;
  color: #fff;
  text-align: center;
  padding: 15px;
  font-size: 14px;
  position: relative;
  bottom: 0;
  width: 100%;
}