/**
 * Design System CSS Tokens
 * Light mode by default, dark mode via @media prefers-color-scheme
 */

:root {
  /* ======================================================================= */
  /* COLOR PALETTE */
  /* ======================================================================= */

  /* Primary Colors (Blue) */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;

  /* Secondary Colors (Purple) */
  --color-secondary-50: #faf5ff;
  --color-secondary-100: #f3e8ff;
  --color-secondary-200: #e9d5ff;
  --color-secondary-300: #d8b4fe;
  --color-secondary-400: #c084fc;
  --color-secondary-500: #a855f7;
  --color-secondary-600: #9333ea;
  --color-secondary-700: #7e22ce;
  --color-secondary-800: #6b21a8;
  --color-secondary-900: #581c87;

  /* Success Colors (Green) */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  --color-success-800: #166534;
  --color-success-900: #145231;

  /* Warning Colors (Amber) */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-200: #fde68a;
  --color-warning-300: #fcd34d;
  --color-warning-400: #fbbf24;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  --color-warning-700: #b45309;
  --color-warning-800: #92400e;
  --color-warning-900: #78350f;

  /* Danger Colors (Red) */
  --color-danger-50: #fef2f2;
  --color-danger-100: #fee2e2;
  --color-danger-200: #fecaca;
  --color-danger-300: #fca5a5;
  --color-danger-400: #f87171;
  --color-danger-500: #ef4444;
  --color-danger-600: #dc2626;
  --color-danger-700: #b91c1c;
  --color-danger-800: #991b1b;
  --color-danger-900: #7f1d1d;

  /* Neutral Colors (Gray) */
  --color-neutral-50: #fafafa;
  --color-neutral-100: #f5f5f5;
  --color-neutral-200: #eeeeee;
  --color-neutral-300: #e0e0e0;
  --color-neutral-400: #bdbdbd;
  --color-neutral-500: #9e9e9e;
  --color-neutral-600: #757575;
  --color-neutral-700: #616161;
  --color-neutral-800: #424242;
  --color-neutral-900: #212121;

  /* Semantic Colors (Light Mode) */
  --color-text-primary: var(--color-neutral-900);
  --color-text-secondary: var(--color-neutral-700);
  --color-text-tertiary: var(--color-neutral-500);
  --color-text-inverse: #ffffff;

  --color-background-primary: #ffffff;
  --color-background-secondary: var(--color-neutral-50);
  --color-background-tertiary: var(--color-neutral-100);
  --color-background-hover: var(--color-neutral-100);
  --color-background-active: var(--color-primary-50);

  --color-border-primary: var(--color-neutral-300);
  --color-border-secondary: var(--color-neutral-200);

  --color-input-background: #ffffff;
  --color-input-border: var(--color-neutral-300);
  --color-input-hover: var(--color-neutral-200);
  --color-input-focus: var(--color-primary-500);

  /* ======================================================================= */
  /* TYPOGRAPHY */
  /* ======================================================================= */

  /* Font Families */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, "Courier New", monospace;

  /* Font Sizes */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 24px;
  --font-size-3xl: 30px;
  --font-size-4xl: 36px;

  /* Line Heights */
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* ======================================================================= */
  /* SPACING */
  /* ======================================================================= */

  --spacing-0: 0px;
  --spacing-1: 4px;
  --spacing-2: 8px;
  --spacing-3: 12px;
  --spacing-4: 16px;
  --spacing-5: 20px;
  --spacing-6: 24px;
  --spacing-8: 32px;
  --spacing-10: 40px;
  --spacing-12: 48px;
  --spacing-16: 64px;
  --spacing-20: 80px;
  --spacing-24: 96px;

  /* ======================================================================= */
  /* SHADOWS */
  /* ======================================================================= */

  --shadow-none: none;
  --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  /* ======================================================================= */
  /* BORDERS */
  /* ======================================================================= */

  --border-radius-none: 0px;
  --border-radius-sm: 2px;
  --border-radius-base: 4px;
  --border-radius-md: 6px;
  --border-radius-lg: 8px;
  --border-radius-xl: 12px;
  --border-radius-full: 9999px;

  --border-width-0: 0px;
  --border-width-1: 1px;
  --border-width-2: 2px;

  /* ======================================================================= */
  /* TRANSITIONS */
  /* ======================================================================= */

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slower: 500ms cubic-bezier(0.4, 0, 0.2, 1);

  /* ======================================================================= */
  /* Z-INDEX */
  /* ======================================================================= */

  --z-index-hide: -1;
  --z-index-base: 0;
  --z-index-dropdown: 1000;
  --z-index-sticky: 1020;
  --z-index-fixed: 1030;
  --z-index-modal-backdrop: 1040;
  --z-index-modal: 1050;
  --z-index-popover: 1060;
  --z-index-tooltip: 1070;

  /* ======================================================================= */
  /* COMPONENT SIZES */
  /* ======================================================================= */

  --input-height-sm: 32px;
  --input-height-base: 36px;
  --input-height-lg: 44px;

  --button-height-sm: 32px;
  --button-height-base: 36px;
  --button-height-lg: 44px;

  --icon-size-xs: 16px;
  --icon-size-sm: 20px;
  --icon-size-base: 24px;
  --icon-size-lg: 32px;
  --icon-size-xl: 48px;

  --grid-row-compact: 32px;
  --grid-row-base: 36px;
  --grid-row-comfortable: 44px;
  --grid-row-touch: 52px;

  --sidebar-width-compact: 64px;
  --sidebar-width-base: 256px;
  --sidebar-width-wide: 320px;

  /* ======================================================================= */
  /* MODULE COLORS */
  /* ======================================================================= */

  --module-color-oms: var(--color-primary-500);
  --module-color-erp: var(--color-secondary-500);
  --module-color-wms: #14b8a6;
  --module-color-common: #6b7280;
}

/* ========================================================================== */
/* DARK MODE */
/* ========================================================================== */

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    /* Semantic Colors (Dark Mode) */
    --color-text-primary: #ffffff;
    --color-text-secondary: var(--color-neutral-300);
    --color-text-tertiary: var(--color-neutral-500);
    --color-text-inverse: var(--color-neutral-900);

    --color-background-primary: var(--color-neutral-900);
    --color-background-secondary: var(--color-neutral-800);
    --color-background-tertiary: var(--color-neutral-700);
    --color-background-hover: var(--color-neutral-700);
    --color-background-active: rgba(59, 130, 246, 0.2);

    --color-border-primary: var(--color-neutral-700);
    --color-border-secondary: var(--color-neutral-600);

    --color-input-background: var(--color-neutral-800);
    --color-input-border: var(--color-neutral-700);
    --color-input-hover: var(--color-neutral-600);
    --color-input-focus: var(--color-primary-400);
  }
}

/* Explicit dark mode via data attribute */
:root[data-theme="dark"] {
  /* Semantic Colors (Dark Mode) */
  --color-text-primary: #ffffff;
  --color-text-secondary: var(--color-neutral-300);
  --color-text-tertiary: var(--color-neutral-500);
  --color-text-inverse: var(--color-neutral-900);

  --color-background-primary: var(--color-neutral-900);
  --color-background-secondary: var(--color-neutral-800);
  --color-background-tertiary: var(--color-neutral-700);
  --color-background-hover: var(--color-neutral-700);
  --color-background-active: rgba(59, 130, 246, 0.2);

  --color-border-primary: var(--color-neutral-700);
  --color-border-secondary: var(--color-neutral-600);

  --color-input-background: var(--color-neutral-800);
  --color-input-border: var(--color-neutral-700);
  --color-input-hover: var(--color-neutral-600);
  --color-input-focus: var(--color-primary-400);
}

/* ========================================================================== */
/* BASE STYLES */
/* ========================================================================== */

* {
  box-sizing: border-box;
}

html {
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  color: var(--color-text-primary);
  background-color: var(--color-background-primary);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  transition: background-color var(--transition-base), color var(--transition-base);
}

/* ========================================================================== */
/* TYPOGRAPHY UTILITIES */
/* ========================================================================== */

h1 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin: var(--spacing-4) 0;
  color: var(--color-text-primary);
}

h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin: var(--spacing-3) 0;
  color: var(--color-text-primary);
}

h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  line-height: var(--line-height-tight);
  margin: var(--spacing-2) 0;
  color: var(--color-text-primary);
}

p {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  margin: var(--spacing-3) 0;
  color: var(--color-text-secondary);
}

/* ========================================================================== */
/* FORM CONTROLS */
/* ========================================================================== */

input[type="text"],
input[type="search"],
input[type="email"],
input[type="password"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: var(--spacing-2) var(--spacing-3);
  border: var(--border-width-1) solid var(--color-input-border);
  border-radius: var(--border-radius-base);
  background-color: var(--color-input-background);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input:hover,
select:hover,
textarea:hover {
  border-color: var(--color-input-hover);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--color-input-focus);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

input:disabled,
select:disabled,
textarea:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: var(--color-background-secondary);
}

/* ========================================================================== */
/* BUTTONS (Basic Styles) */
/* ========================================================================== */

button {
  padding: var(--spacing-2) var(--spacing-4);
  border: var(--border-width-1) solid var(--color-border-primary);
  border-radius: var(--border-radius-base);
  background-color: var(--color-background-secondary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

button:hover:not(:disabled) {
  background-color: var(--color-background-hover);
  border-color: var(--color-border-secondary);
}

button:active:not(:disabled) {
  background-color: var(--color-background-active);
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Primary Button */
button.btn-primary {
  background-color: var(--color-primary-500);
  color: white;
  border-color: var(--color-primary-500);
}

button.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-600);
  border-color: var(--color-primary-600);
}

/* Danger Button */
button.btn-danger {
  background-color: var(--color-danger-500);
  color: white;
  border-color: var(--color-danger-500);
}

button.btn-danger:hover:not(:disabled) {
  background-color: var(--color-danger-600);
  border-color: var(--color-danger-600);
}

/* Success Button */
button.btn-success {
  background-color: var(--color-success-500);
  color: white;
  border-color: var(--color-success-500);
}

button.btn-success:hover:not(:disabled) {
  background-color: var(--color-success-600);
  border-color: var(--color-success-600);
}

/* ========================================================================== */
/* UTILITY CLASSES */
/* ========================================================================== */

.text-primary {
  color: var(--color-text-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-tertiary {
  color: var(--color-text-tertiary);
}

.bg-primary {
  background-color: var(--color-background-primary);
}

.bg-secondary {
  background-color: var(--color-background-secondary);
}

.border {
  border: var(--border-width-1) solid var(--color-border-primary);
}

.rounded {
  border-radius: var(--border-radius-base);
}

.rounded-lg {
  border-radius: var(--border-radius-lg);
}

.shadow {
  box-shadow: var(--shadow-md);
}

.shadow-lg {
  box-shadow: var(--shadow-lg);
}

.transition {
  transition: all var(--transition-base);
}

.m-4 {
  margin: var(--spacing-4);
}

.p-4 {
  padding: var(--spacing-4);
}

.gap-4 {
  gap: var(--spacing-4);
}