body {
  font-family: 'Segoe UI', sans-serif;
  background: #1f1f2f;
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}

.container {
  background-color: #2e2e3e;
  padding: 30px;
  border-radius: 10px;
  width: 100%;
  max-width: 450px;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
  color: #66ccff;
}

label {
  display: block;
  margin-bottom: 10px;
}

input[type="date"] {
  padding: 10px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  background: #3c3c4f;
  color: #fff;
  width: 100%;
  margin-bottom: 15px;
}

button {
  padding: 10px 20px;
  background: #66ccff;
  color: #000;
  font-weight: bold;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s;
  width: 100%;
}

button:hover {
  background: #55bbdd;
}

.result {
  margin-top: 20px;
  text-align: left;
  background: #3a3a4f;
  padding: 15px;
  border-radius: 8px;
  font-size: 0.95rem;
  line-height: 1.6;
}