:root {
  color-scheme: dark;
  color: #111827;
  background: #f8fafc;
  font-family: Inter, system-ui, sans-serif;
}
html, body {
  margin: 0;
  min-height: 100%;
}
body {
  display: grid;
  place-items: center;
  background: linear-gradient(180deg, #eef2ff 0%, #ffffff 55%, #f8fafc 100%);
}
.page-shell {
  width: min(92vw, 640px);
  padding: 1.5rem;
}
.card {
  padding: 2rem;
  border-radius: 1.25rem;
  background: rgba(255,255,255,0.92);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
  border: 1px solid rgba(148, 163, 184, 0.18);
}
.eyebrow {
  margin: 0 0 1rem;
  font-size: 0.95rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: #6366f1;
}
h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  color: #0f172a;
}
p {
  margin: 1.5rem 0 2rem;
  color: #334155;
  line-height: 1.75;
  max-width: 40rem;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 1.6rem;
  background: #6366f1;
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.button:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(99, 102, 241, 0.24);
}
@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}