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

body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, #1f2937, #374151);
}

.container {
  width: min(680px, 92vw);
  color: #f9fafb;
}

h1 { margin-bottom: 0.25rem; }
.subtitle { margin-top: 0; opacity: 0.85; }

.card {
  background: rgba(17, 24, 39, 0.85);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 14px;
  padding: 1rem;
  margin-top: 1rem;
}

.options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 1rem;
}

button {
  border: 0;
  border-radius: 10px;
  padding: 0.65rem 0.8rem;
  cursor: pointer;
  font-weight: 600;
}

.options button { background: #e5e7eb; color: #111827; }
.options button:hover { filter: brightness(0.95); }

.feedback { min-height: 1.5rem; margin-top: 0.8rem; font-weight: 600; }
.hidden { display: none; }