/* === Cargo Calculator — Mobile‑first, Touch‑friendly === */
:root{
  --brand: #f15a29;       /* primary (orange) */
  --brand-2: #2979ff;     /* accent (blue) */
  --bg: #f8f9fa;
  --card: #ffffff;
  --txt: #1f2937;
  --muted: #6b7280;
  --ok: #16a34a;
  --bad: #dc2626;
  --ring: rgba(41,121,255,.15);
  --border: #e5e7eb;
}

/* ...rest of CSS as written in previous patch... */