:root {
  --bt-red: #EF2B32;
  --bt-red-deep: #D91F27;
  --bt-yellow: #FDBD17;
  --bt-green: #34A853;
  --bt-blue: #49B9E6;
  --bt-ink: #17212B;
  --bt-muted: #66737D;
  --bt-cream: #FFFDF5;
  --bt-surface: #FFFFFF;
  --bt-line: #ECE8DE;
  --bt-radius-sm: 12px;
  --bt-radius: 20px;
  --bt-radius-lg: 32px;
  --bt-shadow-sm: 0 8px 28px rgba(23, 33, 43, .07);
  --bt-shadow: 0 18px 50px rgba(217, 31, 39, .12);
  --bt-container: 1200px;
  --bt-transition: 180ms ease;
}