src/app.css

:root {
  --background: #f8fafc;
  --text: #0f172a;
  --border: #cbd5e1;
  --accent: #0ea5e9;
  --accent-hover: #0284c7;
}

body {
  margin: 0;
  padding: 0;
  background-color: var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
}

* {
  box-sizing: border-box;
}

button {
  font-family: inherit;
}

input {
  font-family: inherit;
}