body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  background: linear-gradient(180deg, #00d2ff, #216ce6);
  font-family: 'Manrope', sans-serif;
  color: white;
  flex-direction: column;
  text-align: center;
}
form {
  background: rgba(255,255,255,0.15);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.2);
}
input, button {
  display: block;
  width: 200px;
  margin: 10px auto;
  padding: 10px;
  border-radius: 6px;
  border: none;
}
button {
  background: #000072;
  color: white;
  cursor: pointer;
}
button:hover { background: #0000aa; }
#message { margin-top: 15px; font-weight: bold; }