/* ========================================
   PREMIUM ERP DESIGN SYSTEM
   Version 1.0 - Production Ready
======================================== */

/* ========== ROOT COLORS & VARIABLES ========== */
:root {
  /* Primary Colors */
  --color-primary: #2563EB;
  --color-primary-dark: #1E40AF;
  --color-primary-light: #DBEAFE;
  --color-primary-50: #EFF6FF;

  /* Semantic Colors */
  --color-success: #10B981;
  --color-success-light: #D1FAE5;
  --color-warning: #F59E0B;
  --color-warning-light: #FEF3C7;
  --color-danger: #EF4444;
  --color-danger-light: #FEE2E2;

  /* Neutral Colors */
  --color-bg: #F8FAFC;
  --color-bg-alt: #F1F5F9;
  --color-white: #FFFFFF;
  --color-text: #111827;
  --color-text-secondary: #6B7280;
  --color-border: #E5E7EB;
  --color-border-light: #F3F4F6;

  /* Sidebar */
  --sidebar-bg: #0F172A;
  --sidebar-text: #F1F5F9;
  --sidebar-hover: #1E293B;
  --sidebar-active: linear-gradient(135deg, #2563EB 0%, #1E40AF 100%);

  /* Typography */
  --font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-size-xs: 12px;
  --font-size-sm: 13px;
  --font-size-base: 15px;
  --font-size-lg: 18px;
  --font-size-xl: 20px;
  --font-size-2xl: 28px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 20px;
  --spacing-2xl: 24px;
  --spacing-3xl: 32px;

  /* Border Radius */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --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);

  /* Transitions */
  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== GLOBAL STYLES ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
}

/* ========== TYPOGRAPHY ========== */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
  margin-top: 0;
}

h1 { font-size: 32px; }
h2 { font-size: 28px; }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: 16px; }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

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

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

/* ========== THEME SUPPORT ========== */
[data-theme="dark"] {
  --color-bg: #0F172A;
  --color-bg-alt: #1E293B;
  --color-white: #1E293B;
  --color-text: #F1F5F9;
  --color-text-secondary: #CBD5E1;
  --color-border: #334155;
  --color-border-light: #475569;
}

/* ========== CONTAINERS ========== */
.container-fluid {
  padding-left: var(--spacing-lg);
  padding-right: var(--spacing-lg);
}

/* ========== CARDS ========== */
.card {
  background: var(--color-white);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  padding: 0 0 var(--spacing-lg) 0;
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--spacing-lg);
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
}

.card-body {
  padding: 0;
}

.card-footer {
  padding: var(--spacing-lg) 0 0 0;
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--spacing-lg);
}

/* ========== BUTTONS ========== */
.btn {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: 500;
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-height: 44px;
  white-space: nowrap;
  user-select: none;
}

/* Primary Button */
.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 8px rgba(37, 99, 235, 0.3);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

/* Secondary Button */
.btn-secondary {
  background: var(--color-bg-alt);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-border);
  box-shadow: var(--shadow-sm);
}

/* Success Button */
.btn-success {
  background: var(--color-success);
  color: white;
  box-shadow: 0 2px 4px rgba(16, 185, 129, 0.2);
}

.btn-success:hover {
  background: #059669;
  box-shadow: 0 4px 8px rgba(16, 185, 129, 0.3);
  transform: translateY(-1px);
}

/* Danger Button */
.btn-danger {
  background: var(--color-danger);
  color: white;
  box-shadow: 0 2px 4px rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
  background: #DC2626;
  box-shadow: 0 4px 8px rgba(239, 68, 68, 0.3);
  transform: translateY(-1px);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-ghost:hover {
  background: var(--color-primary-50);
}

/* Size Variants */
.btn-sm {
  padding: 8px 16px;
  font-size: var(--font-size-sm);
  min-height: 32px;
}

.btn-lg {
  padding: 14px 28px;
  font-size: var(--font-size-lg);
  min-height: 48px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ========== FORM ELEMENTS ========== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
}

.form-control,
.form-select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  width: 100%;
  transition: all var(--transition);
  background: var(--color-white);
  color: var(--color-text);
}

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

.form-control:focus,
.form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-50);
  outline: none;
}

.form-control:disabled,
.form-select:disabled {
  background: var(--color-bg-alt);
  color: var(--color-text-secondary);
  cursor: not-allowed;
}

/* ========== BADGES ========== */
.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  white-space: nowrap;
}

.badge-primary {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.badge-success {
  background: var(--color-success-light);
  color: #047857;
}

.badge-warning {
  background: var(--color-warning-light);
  color: #92400E;
}

.badge-danger {
  background: var(--color-danger-light);
  color: #991B1B;
}

.badge-neutral {
  background: var(--color-border-light);
  color: var(--color-text-secondary);
}

/* ========== ALERTS ========== */
.alert {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.alert-success {
  background: var(--color-success-light);
  border-color: var(--color-success);
  color: #047857;
}

.alert-warning {
  background: var(--color-warning-light);
  border-color: var(--color-warning);
  color: #92400E;
}

.alert-danger {
  background: var(--color-danger-light);
  border-color: var(--color-danger);
  color: #991B1B;
}

.alert-info {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: #1E40AF;
}

/* ========== RESPONSIVE TYPOGRAPHY ========== */
@media (max-width: 768px) {
  h1 { font-size: 24px; }
  h2 { font-size: 20px; }
  h3 { font-size: 18px; }

  body {
    font-size: 14px;
  }
}

/* ========== UTILITIES ========== */
.text-primary { color: var(--color-primary); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: #9CA3AF; }

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

.fw-light { font-weight: 300; }
.fw-normal { font-weight: 400; }
.fw-medium { font-weight: 500; }
.fw-semibold { font-weight: 600; }
.fw-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-start { text-align: start; }
.text-end { text-align: end; }

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

.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.p-0 { padding: 0; }
.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }
.p-2xl { padding: var(--spacing-2xl); }

.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

.m-0 { margin: 0; }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }

.mx-auto { margin-left: auto; margin-right: auto; }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

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

.border { border: 1px solid var(--color-border); }
.border-top { border-top: 1px solid var(--color-border); }
.border-bottom { border-bottom: 1px solid var(--color-border); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.cursor-pointer { cursor: pointer; }
.select-none { user-select: none; }

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.fade-in { animation: fadeIn var(--transition); }
.slide-up { animation: slideInUp var(--transition); }
.slide-down { animation: slideInDown var(--transition); }
.scale-in { animation: scaleIn var(--transition); }
.pulse { animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite; }

/* ========== GRID LAYOUT ========== */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

.grid-cols-1 { grid-template-columns: 1fr; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 1200px) {
  .grid-cols-4 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .grid-cols-2 { grid-template-columns: 1fr; }
  .grid-cols-3 { grid-template-columns: repeat(2, 1fr); }
  .grid-cols-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
  .grid-cols-2 { grid-template-columns: 1fr; }
  .grid-cols-3 { grid-template-columns: 1fr; }
  .grid-cols-4 { grid-template-columns: 1fr; }
}

/* ========== FLEXBOX UTILITIES ========== */
.flex {
  display: flex;
}

.flex-col { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }

.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

/* ========== VISIBILITY ========== */
.hidden { display: none !important; }
.visible { display: block !important; }

@media (max-width: 768px) {
  .hidden-mobile { display: none !important; }
}

@media (min-width: 769px) {
  .visible-mobile { display: none !important; }
}