body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  text-align: center;
  padding: 2rem;
}

h1 {
  margin-bottom: 2rem;
}

.input-area {
  margin-bottom: 2rem;
}

input, button {
  padding: 0.5rem;
  font-size: 1rem;
  margin: 0.5rem;
}

#countdown {
  display: flex;
  justify-content: center;
  gap: 2rem;
  font-size: 1.5rem;
}

#countdown div {
  background: #fff;
  padding: 1rem;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

#countdown label {
  display: block;
  font-size: 0.8rem;
  margin-top: 0.25rem;
  color: #555;
}