:root {
  --color-paper: oklch(12.5% 0.018 205);
  --color-paper-2: oklch(16.5% 0.024 202);
  --color-paper-3: oklch(21% 0.029 199);
  --color-surface-soft: oklch(18.5% 0.022 202);
  --color-ink: oklch(95.5% 0.012 190);
  --color-ink-2: oklch(80% 0.018 192);
  --color-muted: oklch(63% 0.022 195);
  --color-neutral: oklch(48% 0.024 198);
  --color-rule: oklch(31% 0.036 196);
  --color-rule-2: oklch(24% 0.029 198);
  --color-accent: oklch(76% 0.145 180);
  --color-accent-strong: oklch(69% 0.155 180);
  --color-accent-soft: oklch(34% 0.072 184);
  --color-accent-ink: oklch(14% 0.025 194);
  --color-focus: oklch(82% 0.18 180);
  --color-negative: oklch(68% 0.17 25);
  --color-negative-soft: oklch(27% 0.055 25);
  --color-warning: oklch(80% 0.13 80);
  --color-white-veil: oklch(98% 0.006 190 / 0.08);
  --color-black-veil: oklch(8% 0.012 205 / 0.72);

  --font-display: 'Zen Kaku Gothic New', sans-serif;
  --font-body: 'Noto Sans JP', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --space-2xs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;
  --space-5xl: 8rem;

  --text-xs: 0.72rem;
  --text-sm: 0.85rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.35rem;
  --text-xl: 1.75rem;
  --text-2xl: 2.25rem;
  --text-3xl: 3rem;
  --text-display-s: clamp(2.45rem, 5.6vw, 5.8rem);
  --text-display: clamp(3rem, 7.6vw, 8rem);
  --text-figure: clamp(3.5rem, 9vw, 9.5rem);

  --radius-xs: 0.25rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.85rem;
  --radius-lg: 1.25rem;

  --rule-thin: 1px;
  --rule-bold: 2px;

  --z-sticky: 200;

  --dur-fast: 120ms;
  --dur-base: 220ms;
  --dur-slow: 520ms;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in: cubic-bezier(0.7, 0, 0.84, 0);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);

  --page-gutter: clamp(1rem, 4vw, 4.5rem);
  --content-max: 86rem;
  --copy-max: 44rem;
}