:root {
  color-scheme: light;

  --color-ink: #182421;
  --color-ink-muted: #66716d;
  --color-paper: #fffdf9;
  --color-canvas: #f7f6f2;
  --color-line: #e6e3dc;
  --color-line-strong: #b8c1bc;
  --color-white: #ffffff;
  --color-black: #101514;

  --color-brand: #075051;
  --color-brand-deep: #063d3e;
  --color-brand-soft: #e1ece9;
  --color-gold: #d39a35;
  --color-gold-deep: #9a691e;
  --color-coral: #bd573f;

  --color-free-bg: #e4f0ef;
  --color-free-surface: #f7fbfa;
  --color-free-ink: #18575b;
  --color-free-accent: #39858a;
  --color-free-line: #b7d4d3;

  --color-private-bg: #0b4649;
  --color-private-surface: #145358;
  --color-private-ink: #f8f3e7;
  --color-private-muted: #c8d9d7;
  --color-private-accent: #dda654;
  --color-private-line: #4f7476;

  --color-referral-bg: #eef2ef;
  --color-referral-surface: #fffdf8;
  --color-referral-ink: #243b37;
  --color-referral-muted: #66736f;
  --color-referral-line: #c5d0cb;

  --color-success: #23724d;
  --color-warning: #a86d15;
  --color-error: #a83e34;
  --color-focus: #167a86;

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: var(--font-sans);

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.875rem;
  --text-3xl: 2.5rem;
  --text-4xl: 3.5rem;

  --leading-tight: 1.08;
  --leading-heading: 1.18;
  --leading-body: 1.58;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-round: 999px;

  --shadow-sm: 0 1px 3px rgba(23, 35, 33, 0.04);
  --shadow-md: 0 8px 20px rgba(23, 35, 33, 0.07);
  --shadow-dark: 0 18px 48px rgba(0, 0, 0, 0.2);

  --container: 70rem;
  --header-height: 4.5rem;
  --transition-fast: 160ms ease;
  --transition-base: 240ms ease;

  --breakpoint-sm: 360px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
}