:root {
  --meter-bar-color: #000;
  --border-radius: 5px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0 auto;
  padding: 5vw;
  max-width: 960px;
  line-height: 1.5;
  font-family: -apple-system, blinkmacsystemfont, "Segoe UI", roboto, oxygen-sans, ubuntu, cantarell, "Helvetica Neue", sans-serif;
}

footer {
  margin-top: auto;
  border-top: 1px solid black;
}