* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background-color: hsl(120, 35%, 26%);
  color: hsl(0, 0%, 92%);
  font-family: "Trebuchet MS", "Arial", sans-serif;
}

h1 {
  text-wrap: wrap;
  text-align: center;
  max-width: 95vw;
}

#calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}

#calendar > p {
  text-align: center;
  margin: 8px 0;
}

.datebox {
  border: 2px solid black;
  background-color: rgb(206, 2, 2);
  margin: 4px 8px;
  aspect-ratio: 1 / 1;
  box-shadow: 1px 1px 4px 0px #22222299;
  border-radius: 4px;
  cursor: pointer;
}

.datebox:hover {
  opacity: 0.8;
}

.datebox:has(#last) {
  background-color: hsl(0, 95%, 54%);
}

a {
  text-decoration: none;
}

.datebox p {
  color: hsl(0, 0%, 92%);
  margin: 4px;
  font-size: 1.2rem;
}

@media (max-width: 600px) {
  .datebox {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }
  .datebox > p {
    margin: 0;
  }
}