body {
  font-family: system-ui, sans-serif;
  background: #0d1117;
  color: #c9d1d9;
  margin: 0;
  padding: 20px;
}

.container { max-width: 900px; margin: 0 auto; text-align: center; }

h1 { font-size: 2.5rem; margin-bottom: 10px; }

p { color: #8b949e; margin-bottom: 30px; }

.controls {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

button {
  background: #21262d;
  color: #c9d1d9;
  border: 1px solid #30363d;
  padding: 10px 20px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}

button:hover { background: #30363d; }

.output { margin-top: 20px; }

.toolbar {
  margin-bottom: 10px;
  text-align: right;
}

pre {
  background: #161b22;
  padding: 16px;
  border-radius: 6px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
  text-align: left;
  max-height: 60vh;
}

.hidden { display: none; }

.uuid-line {
  margin: 8px 0;
  font-family: 'Consolas', monospace;
  color: #79c0ff;
}