body {
  font-family: Arial, sans-serif;
  text-align: center;
}

nav {
  margin: 20px;
}

nav a {
  margin: 0 15px;
  text-decoration: none;
  font-weight: bold;
  color: #4b3190;
}

table {
  margin: 20px auto;
  border-collapse: collapse;
  width: 80%;
}

table, th, td {
  border: 1px solid black;
}

th {
  background-color: #4b3190;
  color: white;
  padding: 10px;
}

td {
  text-align: center;
  vertical-align: middle;
  padding: 8px;
  border: 1px solid #ddd;
}

tr:hover {
  background-color: #f0f0ff;
}

/* Calendar specific */
.calendar {
  width: 90%;
  border: 2px solid #4b3190;
}

.calendar td {
  height: 80px;
}