body {
  margin: 0;
  padding: 0;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  background: #f5f7fa;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}
.container {
  background: white;
  padding: 2rem;
  border-radius: 16px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.1);
  max-width: 700px;
  width: 90%;
  text-align: center;
}
h1 {
  margin: 0;
  font-size: 1.8rem;
  color: #333;
}
.subtitle {
  margin: 0.5rem 0 1.5rem;
  font-size: 0.9rem;
  color: #666;
}
#status {
  font-size: 0.9rem;
  margin: 0.5rem 0 1rem;
  color: #444;
}
pre {
  background: #1e1e2f;
  color: #dcdcdc;
  text-align: left;
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  font-family: "Fira Code", monospace;
  font-size: 0.9rem;
  max-height: 300px;
  margin-bottom: 1.5rem;
}
button {
  background: #4f46e5;
  color: white;
  border: none;
  padding: 0.8rem 1.5rem;
  border-radius: 8px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
}
button:hover {
  background: #4338ca;
}
button:active {
  background: #3730a3;
}