:root {
  color-scheme: light dark;
}

* {
  box-sizing: border-box;
  margin: 0;
}

body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: linear-gradient(135deg, #6366f1, #ec4899);
}

.card {
  text-align: center;
  padding: 3rem 3.5rem;
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.25);
}

h1 {
  font-size: 2.5rem;
  color: #1e1b4b;
}

p {
  margin: 0.75rem 0 1.5rem;
  color: #475569;
}

button {
  padding: 0.65rem 1.5rem;
  font-size: 1rem;
  border: none;
  border-radius: 0.5rem;
  background: #6366f1;
  color: #fff;
  cursor: pointer;
  transition: transform 0.1s ease, background 0.2s ease;
}

button:hover {
  background: #4f46e5;
}

button:active {
  transform: scale(0.96);
}