/* =============================================
   SPIL - CSS Design System Variables
   Premium Industrial Milling Solutions
   ============================================= */

:root {
   /* ─────────────────────────────────────────────
     Color Palette
     ───────────────────────────────────────────── */

   /* Primary - Black & Dark */
   --color-black: #0a0a0a;
   --color-black-light: #111111;
   --color-black-medium: #1a1a1a;

   /* Grays - Depth & Layers */
   --color-gray-900: #1f1f1f;
   --color-gray-800: #2a2a2a;
   --color-gray-700: #3a3a3a;
   --color-gray-600: #4a4a4a;
   --color-gray-500: #6a6a6a;
   --color-gray-400: #8a8a8a;
   --color-gray-300: #aaaaaa;
   --color-gray-200: #cacaca;
   --color-gray-100: #e5e5e5;

   /* White Tones */
   --color-white: #ffffff;
   --color-white-off: #f5f5f5;
   --color-white-warm: #fafafa;

   /* Bronze Accent - Premium Touch */
   --color-bronze: #b08d57;
   --color-bronze-light: #c9a866;
   --color-bronze-dark: #8b7355;
   --color-bronze-gold: #d4af37;
   --color-bronze-muted: #9a7b4f;

   /* Functional Colors */
   --color-success: #4a7c59;
   --color-error: #8b4049;
   --color-warning: #9a7b4f;

   /* ─────────────────────────────────────────────
     Typography
     ───────────────────────────────────────────── */

   /* Font Families */
   --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
   --font-display: 'Outfit', 'Inter', sans-serif;
   --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

   /* Font Sizes - Fluid Typography */
   --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, 1.2rem + 1.5vw, 2rem);
   --text-3xl: clamp(1.875rem, 1.4rem + 2.35vw, 2.5rem);
   --text-4xl: clamp(2.25rem, 1.5rem + 3.75vw, 3.5rem);
   --text-5xl: clamp(3rem, 2rem + 5vw, 5rem);
   --text-6xl: clamp(3.75rem, 2.5rem + 6.25vw, 6rem);

   /* Font Weights */
   --font-thin: 100;
   --font-light: 300;
   --font-regular: 400;
   --font-medium: 500;
   --font-semibold: 600;
   --font-bold: 700;
   --font-black: 900;

   /* Line Heights */
   --leading-none: 1;
   --leading-tight: 1.15;
   --leading-snug: 1.3;
   --leading-normal: 1.5;
   --leading-relaxed: 1.65;
   --leading-loose: 2;

   /* Letter Spacing */
   --tracking-tighter: -0.05em;
   --tracking-tight: -0.025em;
   --tracking-normal: 0;
   --tracking-wide: 0.025em;
   --tracking-wider: 0.05em;
   --tracking-widest: 0.15em;

   /* ─────────────────────────────────────────────
     Spacing System
     ───────────────────────────────────────────── */

   --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 */
   --space-32: 8rem;
   /* 128px */
   --space-40: 10rem;
   /* 160px */

   /* ─────────────────────────────────────────────
     Layout
     ───────────────────────────────────────────── */

   --container-sm: 640px;
   --container-md: 768px;
   --container-lg: 1024px;
   --container-xl: 1280px;
   --container-2xl: 1440px;
   --container-max: 1600px;

   --header-height: 80px;
   --header-height-mobile: 64px;

   /* ─────────────────────────────────────────────
     Borders & Radius
     ───────────────────────────────────────────── */

   --radius-none: 0;
   --radius-sm: 2px;
   --radius-md: 4px;
   --radius-lg: 8px;
   --radius-xl: 12px;
   --radius-2xl: 16px;
   --radius-full: 9999px;

   --border-thin: 1px;
   --border-medium: 2px;
   --border-thick: 3px;

   /* ─────────────────────────────────────────────
     Shadows
     ───────────────────────────────────────────── */

   --shadow-sm: 0 1px 2px 0 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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
   --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3);

   /* Bronze Glow */
   --shadow-bronze: 0 0 20px rgba(176, 141, 87, 0.15);
   --shadow-bronze-lg: 0 0 40px rgba(176, 141, 87, 0.2);

   /* ─────────────────────────────────────────────
     Transitions
     ───────────────────────────────────────────── */

   --duration-75: 75ms;
   --duration-100: 100ms;
   --duration-150: 150ms;
   --duration-200: 200ms;
   --duration-300: 300ms;
   --duration-500: 500ms;
   --duration-700: 700ms;
   --duration-1000: 1000ms;

   --ease-linear: linear;
   --ease-in: cubic-bezier(0.4, 0, 1, 1);
   --ease-out: cubic-bezier(0, 0, 0.2, 1);
   --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
   --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
   --ease-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
   --ease-premium: cubic-bezier(0.23, 1, 0.32, 1);

   /* Standard Transitions */
   --transition-fast: all var(--duration-150) var(--ease-smooth);
   --transition-base: all var(--duration-300) var(--ease-smooth);
   --transition-slow: all var(--duration-500) var(--ease-premium);
   --transition-transform: transform var(--duration-300) var(--ease-premium);
   --transition-opacity: opacity var(--duration-300) var(--ease-smooth);
   --transition-colors: background-color var(--duration-200) var(--ease-smooth),
      color var(--duration-200) var(--ease-smooth),
      border-color var(--duration-200) var(--ease-smooth);

   /* ─────────────────────────────────────────────
     Z-Index Scale
     ───────────────────────────────────────────── */

   --z-behind: -1;
   --z-base: 0;
   --z-above: 10;
   --z-dropdown: 100;
   --z-sticky: 200;
   --z-header: 500;
   --z-overlay: 700;
   --z-modal: 900;
   --z-toast: 1000;
   --z-max: 9999;
}

/* ─────────────────────────────────────────────
   Light Theme Override
   ───────────────────────────────────────────── */
[data-theme="light"] {
   /* Reversed Backgrounds */
   --color-black: #ffffff;
   --color-black-light: #f5f5f5;
   --color-black-medium: #e5e5e5;

   /* Reversed Grays */
   --color-gray-900: #f0f0f0;
   --color-gray-800: #e0e0e0;
   --color-gray-700: #cccccc;
   --color-gray-600: #999999;
   --color-gray-500: #666666;
   --color-gray-400: #555555;
   --color-gray-300: #333333;
   --color-gray-200: #1a1a1a;
   --color-gray-100: #111111;

   /* Text Colors */
   --color-white: #0a0a0a;
   /* Main Headings become dark */
   --color-white-off: #111111;
   --color-white-warm: #1a1a1a;

   /* Bronze adjustments for light bg visibility */
   --color-bronze: #9c7b48;
   --color-bronze-light: #b08d57;

   /* Shadow adjustments */
   --shadow-sm: 0 1px 2px 0 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, 0.06);
   --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
}