:root {
  --color-ink: #0B1220;
  --color-ink-muted: #5A6473;
  --color-ink-subtle: #8A94A3;
  --color-ink-inverse: #FFFFFF;

  --color-surface: #FFFFFF;
  --color-surface-2: #F9FBFE;
  --color-canvas: #F6F8FC;
  --color-canvas-2: #EEF2F8;

  --color-border: #E6EAF2;
  --color-border-strong: #D3DAE6;
  --color-border-focus: #00A66C;

  --color-primary: #00A66C;
  --color-primary-600: #008857;
  --color-primary-700: #006B44;
  --color-primary-100: #E4F7EE;
  --color-primary-50: #F2FBF7;

  --color-accent: #FF5D5D;
  --color-accent-600: #E04545;
  --color-accent-100: #FFE8E8;

  --color-code: #6C47FF;
  --color-code-100: #ECE6FF;
  --color-deal: #F59E0B;
  --color-deal-100: #FEF3D7;

  --color-success: #00A66C;
  --color-warning: #E8A617;
  --color-danger: #D33B3B;
  --color-info: #2563EB;

  --color-footer-bg: #0B1220;
  --color-footer-ink: #EAF0F8;
  --color-footer-ink-muted: #8A94A3;
  --color-footer-border: #1B2433;

  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: "Fraunces", ui-serif, Georgia, "Times New Roman", serif;
  --font-mono: "JetBrains Mono", ui-monospace, "Cascadia Code", "Fira Code", Menlo, Consolas, monospace;

  --fs-12: 0.75rem;
  --fs-14: 0.875rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-48: 3rem;
  --fs-60: 3.75rem;
  --fs-72: 4.5rem;

  --fs-display: clamp(2.25rem, 4vw + 1rem, 4.5rem);
  --fs-h1: clamp(1.875rem, 3vw + 1rem, 3rem);
  --fs-h2: clamp(1.5rem, 2vw + 1rem, 2.25rem);
  --fs-h3: clamp(1.25rem, 1vw + 1rem, 1.5rem);

  --lh-tight: 1.15;
  --lh-snug: 1.3;
  --lh-base: 1.55;
  --lh-loose: 1.7;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --tracking-caps: 0.08em;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-display: 600;

  --sp-0: 0;
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.25rem;
  --sp-6: 1.5rem;
  --sp-8: 2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;
  --sp-20: 5rem;
  --sp-24: 6rem;
  --sp-32: 8rem;

  --r-xs: 4px;
  --r-sm: 8px;
  --r-md: 12px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;
  --r-pill: 9999px;

  --sh-1: 0 1px 2px rgba(11, 18, 32, 0.04), 0 2px 6px rgba(11, 18, 32, 0.05);
  --sh-2: 0 4px 8px rgba(11, 18, 32, 0.06), 0 12px 24px rgba(11, 18, 32, 0.08);
  --sh-3: 0 12px 24px rgba(11, 18, 32, 0.10), 0 32px 64px rgba(11, 18, 32, 0.14);
  --sh-sticky: 0 6px 16px rgba(11, 18, 32, 0.06);
  --sh-inset: inset 0 1px 2px rgba(11, 18, 32, 0.04);
  --sh-glow-primary: 0 0 0 4px rgba(0, 166, 108, 0.18);
  --sh-glow-accent: 0 0 0 4px rgba(255, 93, 93, 0.18);
  --sh-glow-focus: 0 0 0 3px rgba(0, 166, 108, 0.35);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
  --dur-entry: 600ms;

  --container-max: 1280px;
  --container-pad: clamp(1rem, 4vw, 2.5rem);
  --section-pad-y: clamp(3rem, 6vw, 6rem);

  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-drawer: 300;
  --z-modal: 400;
  --z-toast: 500;

  --header-h: 72px;
  --header-h-stuck: 56px;
  --header-strip-h: 44px;
}

[data-theme="dark"] {
  --color-ink: #EAF0F8;
  --color-ink-muted: #A4AFBE;
  --color-ink-subtle: #6C7787;
  --color-ink-inverse: #0B1016;

  --color-surface: #121926;
  --color-surface-2: #0F1622;
  --color-canvas: #0B1016;
  --color-canvas-2: #0F1622;

  --color-border: #1B2433;
  --color-border-strong: #2A3345;
  --color-border-focus: #34D399;

  --color-primary: #34D399;
  --color-primary-600: #10B981;
  --color-primary-700: #059669;
  --color-primary-100: rgba(52, 211, 153, 0.12);
  --color-primary-50: rgba(52, 211, 153, 0.06);

  --color-accent: #FF7575;
  --color-accent-100: rgba(255, 117, 117, 0.12);

  --color-code: #8A6EFF;
  --color-code-100: rgba(138, 110, 255, 0.14);
  --color-deal: #FBBF24;
  --color-deal-100: rgba(251, 191, 36, 0.14);

  --sh-1: 0 1px 2px rgba(0, 0, 0, 0.4), 0 2px 6px rgba(0, 0, 0, 0.35);
  --sh-2: 0 4px 8px rgba(0, 0, 0, 0.4), 0 12px 24px rgba(0, 0, 0, 0.45);
  --sh-3: 0 12px 24px rgba(0, 0, 0, 0.5), 0 32px 64px rgba(0, 0, 0, 0.55);
  --sh-sticky: 0 6px 16px rgba(0, 0, 0, 0.4);
  --sh-glow-focus: 0 0 0 3px rgba(52, 211, 153, 0.4);

  --color-footer-bg: #070B11;
  --color-footer-ink: #EAF0F8;
  --color-footer-ink-muted: #8A94A3;
  --color-footer-border: #1B2433;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
  }
}