@import url('https://fonts.googleapis.com/css2?family=Ubuntu:wght@400;500;700&display=swap');

body {
  margin: 0;
  font-family: "Ubuntu", sans-serif;
  background-color: #f1f1f1;
  height: 80vh;
  display: grid;
  place-items: center;
}

a {
  text-decoration: none;
}

header {
  background-color: #ffffff;
  padding: 20px;
  text-align: center;
  display: flex;
}

ul {
  list-style-type: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 30px;
}

nav {
  display: flex;
  justify-content: space-evenly;
  padding: 1rem;
  gap: 150px;
  font-size: 2rem;
}

li {
  position: relative;
  cursor: pointer;
}

/* Tooltip box */
li::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%);
  background: black;
  color: white;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 0.9rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

/* Tooltip arrow */
li::before {
  content: "";
  position: absolute;
  bottom: 110%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: black transparent transparent transparent;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease-in-out;
}

li:hover::after,
li:hover::before {
  opacity: 1;
  visibility: visible;
}

li + li::before {
  position: static;
  border: none;
  color: gray;
  margin: 0 15px;
  opacity: 1;
  visibility: visible;
}