/* ==========================================================================
   LINKPAD - CSS VARIABLES & DESIGN TOKENS
   ========================================================================== */

:root {
  /* ========== Color Palette ========== */
  /* Primary - Deep space dark theme */
  --color-bg-primary: #0a0a0f;
  --color-bg-secondary: #12121a;
  --color-bg-tertiary: #1a1a25;
  --color-bg-elevated: #22222f;

  /* Text colors */
  --color-text-primary: #f4f4f5;
  --color-text-secondary: #a1a1aa;
  --color-text-muted: #71717a;

  /* Accent - Indigo/Purple gradient feel */
  --color-accent: #6366f1;
  --color-accent-hover: #818cf8;
  --color-accent-subtle: rgba(99, 102, 241, 0.15);
  --color-accent-glow: rgba(99, 102, 241, 0.4);

  /* Secondary accent - Cyan for highlights */
  --color-secondary: #22d3ee;
  --color-secondary-subtle: rgba(34, 211, 238, 0.15);

  /* Semantic colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Border colors */
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);

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

  /* Font sizes - fluid scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.25rem + 1.25vw, 2rem);
  --text-3xl: clamp(1.875rem, 1.5rem + 1.875vw, 3rem);
  --text-4xl: clamp(2.25rem, 1.75rem + 2.5vw, 4rem);
  --text-5xl: clamp(3rem, 2rem + 5vw, 6rem);

  /* Font weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Line heights */
  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* ========== Spacing ========== */
  --space-1: 0.25rem; /* 4px */
  --space-2: 0.5rem; /* 8px */
  --space-3: 0.75rem; /* 12px */
  --space-4: 1rem; /* 16px */
  --space-5: 1.25rem; /* 20px */
  --space-6: 1.5rem; /* 24px */
  --space-8: 2rem; /* 32px */
  --space-10: 2.5rem; /* 40px */
  --space-12: 3rem; /* 48px */
  --space-16: 4rem; /* 64px */
  --space-20: 5rem; /* 80px */
  --space-24: 6rem; /* 96px */

  /* ========== Border Radius ========== */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* ========== Shadows ========== */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  --shadow-xl:
    0 20px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px var(--color-accent-glow);
  --shadow-glow-lg: 0 0 40px var(--color-accent-glow);

  /* ========== Transitions ========== */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);

  /* ========== Z-Index Scale ========== */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;

  /* ========== Container ========== */
  --container-max: 1200px;
  --container-padding: var(--space-6);
}

/* ========== Light Mode Override ========== */
.light-mode {
  --color-bg-primary: #fafafa;
  --color-bg-secondary: #f4f4f5;
  --color-bg-tertiary: #e4e4e7;
  --color-bg-elevated: #ffffff;

  --color-text-primary: #18181b;
  --color-text-secondary: #52525b;
  --color-text-muted: #a1a1aa;

  --color-border: rgba(0, 0, 0, 0.08);
  --color-border-hover: rgba(0, 0, 0, 0.15);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md:
    0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg:
    0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
}

/* ========== Reduced Motion ========== */
@media (prefers-reduced-motion: reduce) {
  :root {
    --transition-fast: 0ms;
    --transition-base: 0ms;
    --transition-slow: 0ms;
    --transition-bounce: 0ms;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}