body {
  margin: 0;
  padding: 0;
  background: linear-gradient(145deg, #0f2027, #203a43, #2c5364);
  color: #fff;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.container {
  text-align: center;
}
.title {
  font-size: 42px;
  margin-bottom: 10px;
  animation: fadeInDown 1s ease-in-out;
}
.subtitle {
  font-size: 16px;
  margin-bottom: 30px;
  color: #ccc;
  animation: fadeIn 2s ease-in-out;
}
input[type="password"] {
  padding: 12px;
  font-size: 16px;
  border-radius: 5px;
  border: none;
  width: 250px;
  margin-bottom: 15px;
}
button {
  padding: 12px 20px;
  font-size: 16px;
  background-color: #4caf50;
  color: white;
  border: none;
  border-radius: 5px;
  cursor: pointer;
}
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}