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

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: #1a1a1a;
  background: linear-gradient(160deg, #f8fafc 0%, #e2e8f0 100%);
}

.wrap {
  max-width: 36rem;
  margin: 0 auto;
  padding: clamp(2rem, 8vw, 4rem) 1.25rem;
}

h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 1rem;
}

.hint {
  margin-top: 1.5rem;
  padding: 1rem 1.125rem;
  font-size: 0.9rem;
  color: #475569;
  background: #fff;
  border-radius: 8px;
  border: 1px solid #e2e8f0;
  box-shadow: 0 1px 2px rgb(15 23 42 / 6%);
}

code {
  font-size: 0.88em;
  padding: 0.15em 0.4em;
  background: #f1f5f9;
  border-radius: 4px;
}