body {
  font-family: Arial, sans-serif;
  background: linear-gradient(120deg, #1e3c72, #2a5298);
  color: white;
  margin: 0;
}

.container {
  max-width: 800px;
  margin: auto;
  padding: 30px;
}

h1 {
  text-align: center;
}

.card {
  background: rgba(255,255,255,0.1);
  padding: 15px;
  margin: 15px 0;
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

button {
  background: #00c6ff;
  border: none;
  padding: 10px 15px;
  margin: 5px;
  border-radius: 8px;
  cursor: pointer;
  color: black;
  font-weight: bold;
}

button:hover {
  background: #00ffcc;
}

input {
  padding: 10px;
  border-radius: 8px;
  border: none;
  width: 60%;
}

pre {
  background: black;
  padding: 10px;
  border-radius: 10px;
  overflow-x: auto;
}

.message {
  background: rgba(255,255,255,0.15);
  padding: 8px;
  margin: 5px 0;
  border-radius: 8px;
}