:root {
  --color-paper: oklch(100% 0 0);
  --color-paper-2: oklch(98.3% 0.008 252);
  --color-paper-3: oklch(96.8% 0.014 252);
  --color-ink: oklch(24% 0.055 255);
  --color-ink-2: oklch(42% 0.035 254);
  --color-muted: oklch(53% 0.03 252);
  --color-rule: oklch(91% 0.018 252);
  --color-rule-strong: oklch(82% 0.05 252);
  --color-accent: oklch(56% 0.23 257);
  --color-accent-soft: oklch(96% 0.028 254);
  --color-accent-ink: oklch(100% 0 0);
  --color-focus: oklch(69% 0.16 250);
  --color-success: oklch(62% 0.16 151);
  --color-danger: oklch(58% 0.2 25);

  --font-display: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;

  --space-3xs: 0.25rem;
  --space-2xs: 0.5rem;
  --space-xs: 0.75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 7rem;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-md: 1.0625rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-display: clamp(2.75rem, 5.2vw, 4.5rem);

  --radius-control: 0.5rem;
  --radius-card: 0.875rem;
  --radius-pill: 999px;
  --rule: 1px solid var(--color-rule);
  --shadow-card: 0 1.25rem 3.5rem oklch(56% 0.23 257 / 0.1);
  --shadow-control: 0 0.5rem 1.5rem oklch(56% 0.23 257 / 0.16);

  --ease-out: cubic-bezier(0.23, 1, 0.32, 1);
  --ease-standard: cubic-bezier(0.25, 0.1, 0.25, 1);
  --dur-short: 140ms;
  --dur-medium: 200ms;
  --dur-reveal: 420ms;
}