:root {
  --ink: #18302a;
  --paper: #f5f0e6;
  --paper-deep: #e8dfcf;
  --forest: #1e4a3b;
  --caspian: #2f6670;
  --terracotta: #a9513f;
  --brass: #b38a43;
  --white: #fffdf8;
  --muted: #5e6b66;
  --border: #c8c0b2;
  --focus: #075f9a;
  --measure: 72ch;
  --radius: 18px;
  --shadow: 0 18px 48px rgba(24,48,42,.12);
  --font-display: Georgia, "Times New Roman", "Noto Serif TC", serif;
  --font-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", sans-serif;
  --space-1: .375rem;
  --space-2: .75rem;
  --space-3: 1rem;
  --space-4: 1.5rem;
  --space-5: 2rem;
  --space-6: 3rem;
  --space-7: clamp(4rem, 8vw, 7rem);
  --step--1: clamp(.8rem, .77rem + .15vw, .9rem);
  --step-0: clamp(1rem, .95rem + .24vw, 1.125rem);
  --step-1: clamp(1.2rem, 1.08rem + .58vw, 1.5rem);
  --step-2: clamp(1.44rem, 1.21rem + 1.13vw, 2rem);
  --step-3: clamp(1.728rem, 1.34rem + 1.94vw, 2.75rem);
  --step-4: clamp(2.074rem, 1.43rem + 3.22vw, 3.75rem);
  --step-5: clamp(2.488rem, 1.48rem + 5.04vw, 5rem);
}