:root {
  color-scheme: light dark;
  font-family: Arial, sans-serif;
}

body {
  margin: 0;
  padding: 0;
  background: #0f172a;
  color: #e2e8f0;
}

.container {
  max-width: 700px;
  margin: 30px auto;
  padding: 0 16px;
}

.card {
  background: #1e293b;
  border: 1px solid #334155;
  border-radius: 12px;
  padding: 16px;
  margin-top: 16px;
}

form {
  display: grid;
  gap: 8px;
}

input,
button {
  font-size: 16px;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #475569;
}

button {
  cursor: pointer;
  background: #22c55e;
  color: #052e16;
  font-weight: 700;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #020617;
  border-radius: 8px;
  padding: 10px;
}