* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

.app {
  max-width: 480px;
  padding: 2rem;
  text-align: center;
}

.back {
  display: inline-block;
  margin-bottom: 1.5rem;
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
}

.back:hover {
  color: #38bdf8;
}

h1 {
  margin: 0 0 0.5rem;
}

p {
  color: #94a3b8;
}

code {
  background: #1e293b;
  padding: 0.1rem 0.35rem;
  border-radius: 4px;
}

button {
  margin-top: 1.5rem;
  padding: 0.6rem 1.25rem;
  font-size: 1rem;
  color: #0f172a;
  background: #38bdf8;
  border: none;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  background: #7dd3fc;
}