:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f0ebf8;
  color: #202124;
}

* { box-sizing: border-box; }
html { min-width: 320px; background: #f0ebf8; }
body { min-width: 320px; min-height: 100vh; margin: 0; overflow-x: hidden; background: #f0ebf8; }
.page-shell { width: 100%; margin: 0; padding: 0; }
.survey-frame { width: 100%; margin: 0; }
iframe { display: block; width: 100%; height: 1700px; border: 0; }
.fallback { margin: 12px 16px 20px; color: #5f6368; font-size: .9rem; text-align: center; }
.fallback a { color: #1a73e8; text-underline-offset: 3px; }
.fallback a:hover, .fallback a:focus-visible { color: #174ea6; }
@media (max-width: 640px) {
  iframe { height: 1800px; }
  .fallback { margin-top: 13px; text-align: left; font-size: .86rem; }
}