:root {
  color-scheme: light;
  --shell-text: #23395d;
  --shell-muted: #6b7a99;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f4f6fa;
  color: var(--shell-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.shell {
  max-width: 34rem;
  padding: 2rem;
  text-align: center;
}

.shell__title {
  margin: 0 0 1rem;
  font-size: 1.25rem;
  font-weight: 600;
}

.shell__status {
  margin: 0;
  font-size: 1rem;
}

.shell__detail {
  margin: 0.75rem 0 0;
  font-size: 0.875rem;
  color: var(--shell-muted);
  word-break: break-word;
}

.shell__button {
  margin-top: 1.25rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--shell-text);
  border-radius: 0.25rem;
  background: #ffffff;
  color: var(--shell-text);
  font: inherit;
  cursor: pointer;
}

.shell--error .shell__status {
  color: #b3261e;
}