body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #00c6ff, #0072ff);
  color: #fff;
  text-align: center;
  padding: 50px;
  margin: 0;
}

.container {
  background-color: rgba(0, 0, 0, 0.4);
  padding: 30px;
  border-radius: 15px;
  display: inline-block;
  max-width: 400px;
  width: 90%;
}

input[type="date"] {
  padding: 10px;
  border: none;
  border-radius: 5px;
  margin-top: 10px;
  width: 100%;
  font-size: 16px;
}

button {
  margin-top: 15px;
  padding: 10px 20px;
  font-size: 16px;
  background-color: #ffffff;
  color: #0072ff;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}

button:hover {
  background-color: #e0e0e0;
}

#result {
  margin-top: 20px;
  font-size: 18px;
  font-weight: bold;
}