index.css

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Lato:wght@700;900&family=Poppins:wght@400;600;700&display=swap');

html {
  font-size: 16px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: rgba(20, 29, 47, 1);
  --secondary-color: #1e2a47;
  --border-color: rgba(194, 183, 183, 0.1);
  --text-color: #fff;
}

/* light theme */
html.light {
  --primary-color: rgb(243, 244, 246);
  --secondary-color: white;
  --border-color: rgba(20, 29, 47, 0.1);
  --text-color: rgba(20, 29, 47, 1);
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Poppins', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--primary-color);
  color: var(--text-color);
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New', monospace;
}

@media (max-width: 480px) {
  html {
    font-size: 12px;
  }
}