:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --success: #16a34a;
  --border: #334155;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-color);
  color: var(--text-main);
  line-height: 1.6;
  padding: 40px 20px;
}

.container { max-width: 720px; margin: 0 auto; }
header { margin-bottom: 32px; border-bottom: 1px solid var(--border); padding-bottom: 16px; }
.badge { background: #3b82f620; color: #60a5fa; border: 1px solid #3b82f640; padding: 4px 10px; border-radius: 9999px; font-size: 0.8rem; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}

.button-group { display: flex; gap: 12px; margin-top: 16px; }
.btn {
  padding: 10px 18px;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.primary { background: var(--primary); color: #fff; }
.primary:hover { background: var(--primary-hover); }
.success { background: var(--success); color: #fff; }

pre {
  background: #090d16;
  border: 1px solid var(--border);
  padding: 12px;
  border-radius: 6px;
  color: #38bdf8;
  font-family: monospace;
  font-size: 0.85rem;
  overflow-x: auto;
  min-height: 100px;
}