:root {
  color-scheme: light dark;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
}

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 60%);
}

.container {
  width: min(720px, 92vw);
  display: grid;
  gap: 1rem;
}

header,
.card,
footer {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid #334155;
  border-radius: 14px;
  padding: 1rem 1.25rem;
}

h1,
h2 {
  margin: 0 0 .5rem;
}

.subtitle {
  margin: 0;
  color: #94a3b8;
}

button {
  border: none;
  border-radius: 10px;
  padding: .6rem .9rem;
  background: #22c55e;
  color: #052e16;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

#plans {
  margin: .5rem 0 0;
  padding-left: 1.25rem;
}

a {
  color: #60a5fa;
}