:root {
  color-scheme: light;

  --canvas: oklch(98.2% 0.008 264);
  --canvas-strong: oklch(95.3% 0.018 264);
  --surface: oklch(100% 0 0);
  --surface-subtle: oklch(96.8% 0.012 264);
  --surface-inverse: oklch(15.5% 0.028 264);
  --ink: oklch(16% 0.026 264);
  --ink-soft: oklch(29% 0.025 264);
  --muted: oklch(45% 0.025 264);
  --faint: oklch(58% 0.02 264);
  --line: oklch(88% 0.018 264);
  --line-strong: oklch(73% 0.025 264);
  --accent: oklch(49% 0.28 264);
  --accent-strong: oklch(42% 0.25 264);
  --accent-soft: oklch(92.5% 0.055 264);
  --accent-on: oklch(99% 0.005 264);
  --warning: oklch(64% 0.17 72);
  --warning-soft: oklch(93% 0.06 78);
  --warning-ink: oklch(34% 0.08 62);
  --focus: oklch(66% 0.21 250);
  --backdrop: oklch(10% 0.025 264 / 68%);
  --shadow-color: oklch(18% 0.045 264 / 13%);

  --font-sans: "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-latin: "SF Pro Display", "Avenir Next", "PingFang SC", sans-serif;

  --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;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-2xl: clamp(2.4rem, 5vw, 5.9rem);

  --radius-sm: 0.65rem;
  --radius-md: 1.1rem;
  --radius-lg: 1.75rem;
  --radius-xl: 2rem;
  --radius-pill: 999px;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.2, 0.9, 0.2, 1.12);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration: 280ms;
  --duration-long: 560ms;

  --header-height: 4.5rem;
  --page-max: 96rem;
  --gutter: clamp(1rem, 3vw, 3.5rem);
  --focus-ring: 3px;
}

:root[data-theme="dark"] {
  color-scheme: dark;

  --canvas: oklch(13.5% 0.025 264);
  --canvas-strong: oklch(17% 0.031 264);
  --surface: oklch(18.5% 0.029 264);
  --surface-subtle: oklch(22% 0.032 264);
  --surface-inverse: oklch(96.5% 0.01 264);
  --ink: oklch(96.5% 0.01 264);
  --ink-soft: oklch(86% 0.015 264);
  --muted: oklch(70% 0.02 264);
  --faint: oklch(58% 0.025 264);
  --line: oklch(29% 0.036 264);
  --line-strong: oklch(42% 0.04 264);
  --accent: oklch(65% 0.25 260);
  --accent-strong: oklch(70% 0.23 258);
  --accent-soft: oklch(25% 0.09 264);
  --accent-on: oklch(99% 0.005 264);
  --warning: oklch(74% 0.16 78);
  --warning-soft: oklch(28% 0.07 72);
  --warning-ink: oklch(91% 0.08 80);
  --focus: oklch(73% 0.18 247);
  --backdrop: oklch(7% 0.02 264 / 78%);
  --shadow-color: oklch(3% 0.02 264 / 35%);
}