body {
  background-color: #0d1117;
  color: #00ffcc;
  font-family: 'Poppins', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
}

.container {
  text-align: center;
  border: 2px solid #00ffcc;
  padding: 40px 60px;
  border-radius: 15px;
  box-shadow: 0 0 25px #00ffcc;
  background-color: #161b22;
}

h1 {
  margin-bottom: 10px;
}

p {
  color: #9ae6d3;
}

.input-box {
  margin: 20px 0;
}

input[type="date"] {
  padding: 10px;
  border-radius: 8px;
  border: none;
  outline: none;
  font-size: 16px;
}

button {
  padding: 10px 20px;
  margin-left: 10px;
  border: none;
  background-color: #00ffcc;
  color: #0d1117;
  font-weight: bold;
  border-radius: 8px;
  cursor: pointer;
  transition: 0.3s;
}

button:hover {
  background-color: #06d6a0;
}

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