body {
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  padding: 20px;
  background: #f5f5f5;
}

.calendar-container {
  width: 350px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  padding: 20px;
}

.calendar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.calendar-header button {
  background: #0099cc;
  color: white;
  border: none;
  padding: 6px 12px;
  border-radius: 5px;
  cursor: pointer;
}

.day-names, .calendar-days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 5px;
  text-align: center;
}

.day-names div {
  font-weight: bold;
  color: #333;
}

.calendar-days div {
  padding: 10px 0;
  background: #e0f7fa;
  border-radius: 5px;
}