* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #f4f4f4;
  font-family: Arial, sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

.datepicker {
  width: 320px;
  background-color: white;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
  font-size: 1.1rem;
  margin-bottom: 15px;
}

.nav {
  cursor: pointer;
  padding: 5px 10px;
  user-select: none;
  transition: background 0.2s;
}

.nav:hover {
  background-color: #eee;
  border-radius: 4px;
}

.weekdays,
.days {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  margin-bottom: 10px;
}

.weekdays div {
  font-weight: bold;
  color: #555;
  padding: 10px 0;
}

.days div {
  padding: 10px 0;
  border-radius: 4px;
  transition: background 0.2s;
  cursor: default;
}

.days div:hover {
  background-color: #30f0ff;
}

.days .prev-month,
.days .next-month {
  color: #ccc;
}