:root {
  --bg: #fff;
  --text: #17212b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
}

.app-shell {
  text-align: center;
}

#preview {
  width: 150px;
  height: 150px;
  margin: 1rem auto;
  border: 2px solid #000;
}