:root {
  --family-serif: "DM Serif Display", serif;
  --family-sans-serif: "Inter", -apple-system, "BlinkMacSystemFont", "Segoe UI",
    "Roboto", "Helvetica", "Arial", sans-serif, "Apple Color Emoji",
    "Segoe UI Emoji", "Segoe UI Symbol";
}

body {
  font-family: var(--family-sans-serif);
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

main {
  flex-grow: 1;
}

header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
}
header, footer {
  background-color: cornflowerblue;
  color: white;
}
.nav {
  height: 2rem;
  padding-top: 0.4em;
}

.nav-container {
  display: flex;
  flex-wrap: nowrap;
}

.nav-container>* {
  margin-right: 2em;
}

.container {
  max-width: 700px;
  margin: 0 auto;
  padding-left: 2rem;
  padding-right: 2rem;
}

.card {
  background-color: lightgray;
  border-radius: 4px;
  margin-bottom: 0.8em;
}

.card.card-body {
  padding: 0.8em;
}

.card.highlighted {
  background-color: darkorange;
  color: white;
}

button {
  border: none;
  background: none;
}

button.btn {
  padding: 0.4em 0.5em;
  background: cornflowerblue;
  color: white;
  border-radius: 4px;
  border: 2px blue;
}

button.btn:hover {
  background-color: blue;
}