/* ===================================================
   GO-MANUFACTURE DESIGN SYSTEM
   Phase 1: Clean CSS Architecture
   Target: <30KB total CSS
   =================================================== */

/* ===================================================
   1. CSS CUSTOM PROPERTIES (Design Tokens)
   =================================================== */

:root {
  /* === EGYPT-FOCUSED INDUSTRIAL B2B PLATFORM COLORS === */
  
  /* Primary Brand Colors */
  --primary-navy: #061b29;
  --primary-blue: #131212;
  --page-background: #F6F8FB;
  --table-header-bg: #EEF3F8;
  
  /* Status Colors */
  --status-approved: #22C55E;
  --status-active: #22C55E;
  --status-pending: #F59E0B;
  --status-blocked: #EF4444;
  --status-rejected: #EF4444;
  
  /* Legacy mappings */
  --secondary-gray: #6B7280;
  --accent-blue: var(--primary-blue);
  --accent-amber: var(--status-pending);
  --background-light: var(--page-background);
  --border-light: #E5E7EB;
  
  --color-primary: var(--primary-blue);
  --color-primary-hover: #1651E0;
  --color-primary-light: #3b82f6;
  
  /* Neutral Grays */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* Semantic Colors */
  --color-success: var(--status-approved);
  --color-success-bg: #dcfce7;
  --color-warning: var(--status-pending);
  --color-warning-bg: #fef3c7;
  --color-error: var(--status-blocked);
  --color-error-bg: #fee2e2;
  --color-info: var(--primary-blue);
  --color-info-bg: #dbeafe;
  
  /* Background & Surface */
  --color-bg: #ffffff;
  --color-bg-secondary: var(--page-background);
  --color-surface: #ffffff;
  --color-border: var(--border-light);
  
  /* Text Colors */
  --color-text: black;
  --color-text-secondary: var(--secondary-gray);
  --color-text-muted: var(--color-gray-500);
  
  /* Table Colors */
  --table-bg: #FFFFFF;
  --table-row-hover: #F8FAFC;
  
  /* === TYPOGRAPHY === */
  
  /* Font Families */
  /* Body/UI: Inter (preferred) with Roboto fallback */
  --font-sans: 'Inter', Roboto, -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  /* Headings: Montserrat (Bold/ExtraBold preferred) falling back to the sans stack */
  --font-heading: 'Montserrat', var(--font-sans);
  --font-mono: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;      /* 12px */
  --text-sm: 0.875rem;     /* 14px */
  --text-base: 1rem;       /* 16px */
  --text-lg: 1.125rem;     /* 18px */
  --text-xl: 1.25rem;      /* 20px */
  --text-2xl: 1.5rem;      /* 24px */
  --text-3xl: 1.875rem;    /* 30px */
  --text-4xl: 2.25rem;     /* 36px */
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;
  
  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  
  /* === 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 */
  
  /* === SIZING === */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  
  /* === BORDERS === */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-full: 9999px;
  
  /* === SHADOWS === */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* === TRANSITIONS === */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 200ms ease-in-out;
  --transition-slow: 300ms ease-in-out;
  
  /* === Z-INDEX === */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

/* ===================================================
   2. BASE RESET
   =================================================== */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  /* Always show scrollbar gutter to prevent layout shifts */
  overflow-y: scroll;
  scrollbar-gutter: stable;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--page-background);
  /* Prevent layout shifts */
  min-width: 320px;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  color: black;
}

h1 { font-size: var(--text-4xl); font-weight: 800; }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-hover);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

/* ===================================================
   3. LAYOUT
   =================================================== */

.container {
  width: 100%;
  max-width: 100%;
  margin-left: 0;
  margin-right: 0;
  padding-left: 0;
  padding-right: 0;
  box-sizing: border-box;
}

.container--sm { max-width: 100%; }
.container--md { max-width: 100%; }
.container--lg { max-width: 100%; }

/* ===================================================
   4. BUTTONS (BEM Naming Convention)
   =================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: var(--leading-tight);
  text-align: center;
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Button Variants (BEM with backwards compatibility) */
.btn--primary,
.btn-primary {
  background-color: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

/* .btn--primary:hover:not(:disabled),
.btn-primary:hover:not(:disabled) {
  background-color: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
} */

.btn--secondary,
.btn-secondary {
  background-color: var(--color-gray-100);
  color: var(--color-gray-700);
  border-color: var(--color-gray-300);
}

.btn--secondary:hover:not(:disabled),
.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-gray-200);
}

.btn--outline,
.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--outline:hover:not(:disabled),
.btn-outline:hover:not(:disabled) {
  background-color: var(--color-primary);
  color: white;
}

.btn--ghost,
.btn-ghost {
  background-color: transparent;
  color: var(--color-gray-700);
  border-color: transparent;
}

.btn--ghost:hover:not(:disabled),
.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-gray-100);
}

.btn--success,
.btn-success {
  background-color: var(--color-success);
  color: white;
  border-color: var(--color-success);
}

.btn--danger,
.btn-danger {
  background-color: var(--color-error);
  color: white;
  border-color: var(--color-error);
}

/* Button Sizes (BEM with backwards compatibility) */
.btn--sm,
.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
}

.btn--lg,
.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-lg);
}

.btn--block,
.btn-block {
  display: flex;
  width: 100%;
}

/* ===================================================
   5. FORMS
   =================================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text);
}

.form-label .required {
  color: var(--color-error);
}

.form-control {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1);
}

.form-control:disabled {
  background-color: var(--color-gray-100);
  cursor: not-allowed;
}

.form-control--error {
  border-color: var(--color-error);
}

.form-text {
  display: block;
  margin-top: var(--space-1);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.form-text--error {
  color: var(--color-error);
}

.form-text--warning {
  color: var(--color-warning);
}

/* ===================================================
   6. CARDS
   =================================================== */

.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card__header {
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.card__body {
  padding: var(--space-4);
}

.card__footer {
  padding: var(--space-4);
  border-top: 1px solid var(--color-border);
  background-color: var(--color-bg-secondary);
}

/* ===================================================
   7. BADGES & TAGS (BEM with backwards compatibility)
   =================================================== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  line-height: 1;
}

.badge--success,
.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.badge--warning,
.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge--error,
.badge-error {
  background-color: var(--color-error-bg);
  color: var(--color-error);
}

.badge--info,
.badge-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}

/* ===================================================
   8. ALERTS (BEM with backwards compatibility)
   =================================================== */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
}

.alert--success,
.alert-success {
  background-color: var(--color-success-bg);
  border-color: var(--color-success);
  color: var(--color-success);
}

.alert--error,
.alert-error {
  background-color: var(--color-error-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}

.alert--warning,
.alert-warning {
  background-color: var(--color-warning-bg);
  border-color: var(--color-warning);
  color: var(--color-warning);
}

.alert--info,
.alert-info {
  background-color: var(--color-info-bg);
  border-color: var(--color-info);
  color: var(--color-info);
}

/* ===================================================
   9. UTILITIES
   =================================================== */

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

/* Flex */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Text Colors */
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

/* Spacing Utilities */
.m-0 { margin: 0; }
.m-auto { margin: auto; }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.p-0 { padding: 0; }
.p-4 { padding: var(--space-4); }

/* Visibility */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* ===================================================
   10. RESPONSIVE BREAKPOINTS
   =================================================== */

/* Mobile First - Base styles are for mobile */

/* Tablet: 768px and up */
@media (min-width: 768px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

/* Desktop: 1024px and up */
@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* Wide: 1280px and up */
@media (min-width: 1280px) {
  html {
    font-size: 18px;
  }
}