/* Google Fonts: Open Sans */
@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@400;600&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background: linear-gradient(135deg, #4facfe, #00f2fe);
  font-family: 'Open Sans', sans-serif;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.container {
  background: #fff;
  padding: 2.5rem 3rem;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  text-align: center;
  max-width: 400px;
  width: 90%;
}

.container h1 {
  margin-bottom: 1.5rem;
  color: #333;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 600;
  color: #555;
}

input[type="date"] {
  padding: 0.6rem 0.8rem;
  width: 100%;
  border: 2px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  transition: border 0.3s ease;
}

input[type="date"]:focus {
  border-color: #4facfe;
  outline: none;
}

button {
  margin-top: 1.2rem;
  padding: 0.6rem 1.2rem;
  background: #4facfe;
  border: none;
  color: #fff;
  font-size: 1rem;
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.3s ease;
}

button:hover {
  background: #00c6fb;
}

#result {
  margin-top: 1.5rem;
  font-weight: 600;
  color: #333;
  font-size: 1.1rem;
}