:root {
  --color-bg: oklch(13% 0.015 260);
  --color-bg-elevated: oklch(17% 0.02 260);
  --color-surface: oklch(20% 0.022 260);
  --color-surface-hover: oklch(24% 0.025 260);
  --color-border: oklch(28% 0.02 260 / 0.6);
  --color-border-strong: oklch(40% 0.03 260 / 0.7);

  --color-text: oklch(95% 0.005 60);
  --color-text-muted: oklch(70% 0.01 60);
  --color-text-dim: oklch(55% 0.01 60);

  --color-accent: oklch(72% 0.18 50);
  --color-accent-soft: oklch(72% 0.18 50 / 0.15);
  --color-accent-strong: oklch(78% 0.2 55);

  --color-call: oklch(72% 0.18 145);
  --color-call-soft: oklch(72% 0.18 145 / 0.18);
  --color-put: oklch(65% 0.22 25);
  --color-put-soft: oklch(65% 0.22 25 / 0.2);

  --color-cyan: oklch(78% 0.13 215);
  --color-violet: oklch(72% 0.17 295);
  --color-yellow: oklch(85% 0.15 95);

  --font-sans: "Inter", "IBM Plex Sans Thai", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Crimson Pro", "Noto Serif Thai", Georgia, serif;
  --font-mono: "JetBrains Mono", "SF Mono", Menlo, monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: clamp(1rem, 0.95rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1rem + 0.4vw, 1.25rem);
  --text-xl: clamp(1.375rem, 1.2rem + 0.6vw, 1.625rem);
  --text-2xl: clamp(1.75rem, 1.4rem + 1vw, 2.25rem);
  --text-3xl: clamp(2.25rem, 1.6rem + 2vw, 3.25rem);
  --text-hero: clamp(2.75rem, 1.8rem + 4vw, 5rem);

  --leading-tight: 1.2;
  --leading-snug: 1.4;
  --leading-normal: 1.65;
  --leading-loose: 1.8;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-section: clamp(4rem, 3rem + 5vw, 8rem);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-xl: 24px;

  --shadow-soft: 0 1px 2px oklch(0% 0 0 / 0.4), 0 8px 24px oklch(0% 0 0 / 0.25);
  --shadow-glow: 0 0 0 1px oklch(72% 0.18 50 / 0.4), 0 0 40px oklch(72% 0.18 50 / 0.15);

  --duration-fast: 150ms;
  --duration-normal: 280ms;
  --duration-slow: 600ms;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quad: cubic-bezier(0.25, 0.46, 0.45, 0.94);

  --content-width: min(1100px, 100% - 2.5rem);
  --content-narrow: min(720px, 100% - 2.5rem);
}