:root {
  /* Hong Kong taxi — urban red + NT green */
  --color-taxi-red: #d32f2f;
  --color-taxi-red-dark: #b71c1c;
  --color-taxi-red-light: #ef5350;
  --color-taxi-green: #0f9d58;
  --color-taxi-green-dark: #0b7a44;
  --color-charcoal: #1a1a1a;
  --color-ink: #1a1a1a;
  --color-slate: #3d3d3d;
  --color-muted: #6b6b6b;
  --color-border: #e6e2de;
  --color-surface: #ffffff;
  --color-bg: #f7f6f4;
  --color-bg-alt: #f0eeeb;
  --color-cream: #faf9f7;
  --color-success: #0f9d58;
  --color-pickup: #0f9d58;
  --color-dropoff: #d32f2f;
  --color-warning: #ed6c02;
  --color-info: #0277bd;
  --color-on-red: #ffffff;
  --color-on-dark: #ffffff;
  --color-sheet: #ffffff;
  --color-soft: #f3f1ee;
  --color-input: #f0eeeb;

  --font-sans: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --font-display: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;

  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-md: 1.125rem;
  --fs-lg: 1.375rem;
  --fs-xl: 1.75rem;
  --fs-2xl: 2rem;
  --fs-3xl: clamp(2rem, 4vw, 2.75rem);
  --fs-hero: clamp(2.25rem, 6vw, 3.5rem);

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-bold: 700;
  --lh-tight: 1.15;
  --lh-base: 1.5;
  --lh-loose: 1.7;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;

  --container: 1120px;
  --header-h: 64px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --shadow-sm: 0 1px 2px rgba(26, 26, 26, 0.06);
  --shadow-md: 0 4px 16px rgba(26, 26, 26, 0.08);
  --shadow-lg: 0 8px 28px rgba(26, 26, 26, 0.12);
  --shadow-sheet: 0 -2px 16px rgba(26, 26, 26, 0.08);
  --transition: 0.2s ease;
  --z-header: 1000;
  --z-overlay: 1100;
  --z-toast: 1200;
}