:root {
  --color-primary-50: #f7fee7;
  --color-primary-100: #ecfccb;
  --color-primary-200: #d9f99d;
  --color-primary-300: #bef264;
  --color-primary-400: #a3e635;
  --color-primary-500: #84cc16;
  --color-primary-600: #65a30d;
  --color-primary-700: #4d7c0f;
  --color-primary-800: #3f6212;
  --color-primary-900: #365314;
  --color-primary-950: #1a2e05;

  --color-neutral-0: #ffffff;
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #e5e5e5;
  --color-neutral-300: #d4d4d4;
  --color-neutral-400: #a3a3a3;
  --color-neutral-500: #737373;
  --color-neutral-600: #525252;
  --color-neutral-700: #404040;
  --color-neutral-800: #262626;
  --color-neutral-900: #171717;
  --color-neutral-950: #0a0a0a;

  --color-bg: var(--color-neutral-50);
  --color-surface: var(--color-neutral-0);
  --color-surface-elevated: var(--color-neutral-0);
  --color-surface-shade: var(--color-neutral-100);
  --color-skeleton: var(--color-neutral-200);
  --color-text-primary: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-600);
  --color-text-muted: var(--color-neutral-500);
  --color-text-inverse: var(--color-neutral-0);
  --color-border: var(--color-neutral-200);
  --color-border-strong: var(--color-neutral-300);
  --color-accent: var(--color-primary-600);
  --color-focus: var(--color-primary-600);
  --color-error: #dc2626;
  --color-success: #16a34a;
  --color-warning: #f59e0b;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  --leading-tight: 1.1;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  --radius-none: 0;
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-slow: 350ms ease;

  --space-0: 0;
  --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;

  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
  --bp-2xl: 1536px;

  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
  --z-fab: 90;

  --container-max: 1200px;
  --header-height: 4.5rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #f0f0f5;
    --color-surface: #ffffff;
    --color-surface-elevated: #ffffff;
    --color-surface-shade: #e8e8ed;
    --color-skeleton: #d4d4d8;
    --color-text-primary: #18181b;
    --color-text-secondary: #52525b;
    --color-text-muted: #71717a;
    --color-border: #d4d4d8;
    --color-border-strong: #a1a1aa;
    --color-focus: var(--color-primary-600);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}