body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 1rem 2rem;
}

header nav a {
  margin-right: 1rem;
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem 0;
}

th, td {
  border: 1px solid #ccc;
  padding: 0.4rem 0.6rem;
  text-align: left;
}

fieldset {
  margin-bottom: 1rem;
}

.errors {
  color: #b00020;
}

.flash-message {
  color: #0a6b2e;
}

footer {
  margin-top: 2rem;
  color: #888;
}