*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;

  background-color: #333;

}

.container {
  width: 50vw;
  background-color: #999;
  padding: 2rem;
  border-radius: 1rem;
}

ul {
  list-style-type: none;
}

.item-avaliable,
.item-not-avaliable {
  width: 50%;
  display: inline-block;
  padding: 0.3rem;
  color: white;
  background-color: hsl(200, 100%, 50%);
  border-radius: 0.5rem;
  text-align: center;
  text-decoration: none;
  margin-bottom: 0.2rem;
}

.item-avaliable:hover,
.item-not-avaliable:hover {
  background-color: hsl(200, 100%, 40%);
}