body {
  font-family: Arial, sans-serif;
  background: #f4f4f4;
  padding: 20px;
}

h1 {
  text-align: center;
}

#timezoneSelect, #addClockBtn {
  margin: 10px;
  padding: 8px;
  font-size: 1rem;
}

#clockGrid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
}

.clock {
  background: #fff;
  border: 1px solid #ccc;
  padding: 15px;
  border-radius: 8px;
  width: 200px;
  text-align: center;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.city {
  font-weight: bold;
  margin-bottom: 10px;
}

.time {
  font-size: 1.5rem;
  color: #333;
}