:root {
  font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color-scheme: light dark;
  color: #eceff4;
  background-color: #0f172a;
}

body {
  margin: 0;
  min-height: 100vh;
  background: radial-gradient(circle at 10% 20%, #312e81, #0f172a 60%);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem;
}

.app {
  width: min(480px, 100%);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

header {
  text-align: center;
}

h1 {
  font-size: clamp(2rem, 8vw, 3.2rem);
  margin-bottom: 0.2rem;
}

.card {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(99, 102, 241, 0.4);
  border-radius: 18px;
  padding: 1.25rem;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.5);
}

.card ul,
.card ol {
  margin: 0.75rem 0 0;
  padding-left: 1.15rem;
}

button {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: 999px;
  border: none;
  background: linear-gradient(120deg, #6366f1, #8b5cf6);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.2s ease, opacity 0.3s ease;
}

button:hover {
  transform: translateY(-1px);
  opacity: 0.95;
}

button:active {
  transform: translateY(1px) scale(0.99);
}