h1 {
  font-size: 25px;
  font-family: 'Montserrat', sans-serif;
  font-weight: bold;
  color: #ffffff;
}

* {
  margin: 100;
  padding: 100;
}

i {
  margin-right: 20px;
}



main {
  margin-top: 80px;

}



.logo-xunito {
  display: block;
  margin: 0 auto;
  width: 20px;
  height: 20px;
}


article image:hover .tooltip {
  visibility: visible;
  opacity: 1;
}

.nav-item:hover .tooltip {
  visibility: visible;
  opacity: 1;
}


#contador {
  text-align: center;
  display: inline;
}

#segundos {
  font-size: 28px;
  color: #d9534f;
  font-weight: bold;
  display: inline;
}
* {
  transition: all 0.3s ease;
  box-sizing: border-box;
}

.libros {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 20px;
}