body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background-color: #f4f4f9;
}

.calendar-container {
  text-align: center;
  background: #ffffff;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

header button {
  padding: 5px 10px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

header button:hover {
  background: #0056b3;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

.calendar {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  margin-top: 20px;
}

.day,
.date {
  padding: 10px;
  text-align: center;
  border: 1px solid #ddd;
  border-radius: 5px;
}

.date {
  cursor: pointer;
}

.date.today {
  background: #007bff;
  color: white;
  font-weight: bold;
  border-radius: 50%;
}