/* ============================================
   GLOBAL DESIGN SYSTEM - KPI Management
   Modern, Professional, International UI
   ============================================ */

/* Import Google Fonts - Inter for UI */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   CSS Variables - Design Tokens
   ============================================ */
:root {
  /* Primary Colors - Modern 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;

  /* Neutral Colors - Modern Gray */
  --color-neutral-50: #f8fafc;
  --color-neutral-100: #f1f5f9;
  --color-neutral-200: #e2e8f0;
  --color-neutral-300: #cbd5e1;
  --color-neutral-400: #94a3b8;
  --color-neutral-500: #64748b;
  --color-neutral-600: #475569;
  --color-neutral-700: #334155;
  --color-neutral-800: #1e293b;
  --color-neutral-900: #0f172a;

  /* Success Colors */
  --color-success-50: #f0fdf4;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;

  /* Warning Colors */
  --color-warning-50: #fffbeb;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;

  /* Error Colors */
  --color-error-50: #fef2f2;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;

  /* Spacing Scale */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --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), 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);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
}

/* ============================================
   Base Styles
   ============================================ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-neutral-800);
  background: linear-gradient(135deg, var(--color-neutral-50) 0%, var(--color-primary-50) 100%);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Modern Card Styles
   ============================================ */
.modern-card {
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-xl);
  transition: all var(--transition-base);
  border: 1px solid var(--color-neutral-100);
}

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

.modern-card-compact {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--spacing-lg);
  border: 1px solid var(--color-neutral-100);
}

/* ============================================
   Modern Button Styles
   ============================================ */
.btn-modern {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
}

.btn-modern:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-modern-primary {
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: white;
}

.btn-modern-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-primary-800) 100%);
}

.btn-modern-secondary {
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.btn-modern-secondary:hover {
  background: var(--color-neutral-200);
}

.btn-modern-success {
  background: linear-gradient(135deg, var(--color-success-500) 0%, var(--color-success-600) 100%);
  color: white;
}

.btn-modern-success:hover {
  background: linear-gradient(135deg, var(--color-success-600) 0%, var(--color-success-700) 100%);
}

.btn-modern-outline {
  background: transparent;
  border: 2px solid var(--color-primary-500);
  color: var(--color-primary-600);
}

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

/* ============================================
   Modern Input Styles
   ============================================ */
.input-modern {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  padding: 0.75rem 1rem;
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-md);
  width: 100%;
  transition: all var(--transition-fast);
  background: white;
}

.input-modern:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.input-modern::placeholder {
  color: var(--color-neutral-400);
}

/* ============================================
   Modern Badge Styles
   ============================================ */
.badge-modern {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.badge-success {
  background: var(--color-success-50);
  color: var(--color-success-700);
}

.badge-warning {
  background: var(--color-warning-50);
  color: var(--color-warning-600);
}

.badge-error {
  background: var(--color-error-50);
  color: var(--color-error-600);
}

.badge-primary {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

/* ============================================
   Modern Progress Bar
   ============================================ */
.progress-modern {
  height: 0.5rem;
  background: var(--color-neutral-100);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-modern {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

/* ============================================
   Modern Stats Card
   ============================================ */
.stat-card-modern {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--color-primary-500);
  transition: all var(--transition-base);
}

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

.stat-value-modern {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--color-neutral-900);
  line-height: 1;
}

.stat-label-modern {
  font-size: var(--font-size-sm);
  color: var(--color-neutral-500);
  font-weight: 500;
  margin-top: var(--spacing-sm);
}

/* ============================================
   Modern Table Styles
   ============================================ */
.table-modern {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.table-modern thead {
  background: var(--color-neutral-50);
}

.table-modern th {
  padding: 1rem;
  text-align: left;
  font-weight: 600;
  font-size: var(--font-size-sm);
  color: var(--color-neutral-700);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid var(--color-neutral-200);
}

.table-modern td {
  padding: 1rem;
  border-bottom: 1px solid var(--color-neutral-100);
}

.table-modern tbody tr {
  transition: all var(--transition-fast);
}

.table-modern tbody tr:hover {
  background: var(--color-neutral-50);
}

/* ============================================
   Modern Header/Navigation
   ============================================ */
.header-modern {
  background: white;
  box-shadow: var(--shadow-sm);
  border-bottom: 1px solid var(--color-neutral-100);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-link-modern {
  padding: 0.75rem 1rem;
  color: var(--color-neutral-600);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

.nav-link-modern:hover {
  background: var(--color-primary-50);
  color: var(--color-primary-700);
}

.nav-link-modern-active {
  background: var(--color-primary-500);
  color: white;
}

/* ============================================
   Modern Dashboard Grid
   ============================================ */
.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

/* ============================================
   Modern Alert/Notification
   ============================================ */
.alert-modern {
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  border-left: 4px solid;
}

.alert-success {
  background: var(--color-success-50);
  border-color: var(--color-success-500);
  color: var(--color-success-700);
}

.alert-warning {
  background: var(--color-warning-50);
  border-color: var(--color-warning-500);
  color: var(--color-warning-600);
}

.alert-error {
  background: var(--color-error-50);
  border-color: var(--color-error-500);
  color: var(--color-error-600);
}

/* ============================================
   Modern Animations
   ============================================ */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

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

.animate-slide-in {
  animation: slideIn var(--transition-base) ease-out;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
  
  .modern-card {
    padding: var(--spacing-lg);
  }
  
  :root {
    --font-size-3xl: 1.5rem;
    --font-size-4xl: 1.875rem;
  }
}

/* ============================================
   Utility Classes
   ============================================ */
.text-gradient {
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-800) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.backdrop-blur {
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* ============================================
   Legacy Button Classes (Mapped to Modern)
   ============================================ */
.btn-primary {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-primary-700) 100%);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-primary-800) 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
  background: var(--color-neutral-100);
  color: var(--color-neutral-700);
}

.btn-secondary:hover {
  background: var(--color-neutral-200);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-success {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--color-success-500) 0%, var(--color-success-600) 100%);
  color: white;
}

.btn-success:hover {
  background: linear-gradient(135deg, var(--color-success-600) 0%, var(--color-success-700) 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-danger {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
  background: linear-gradient(135deg, var(--color-error-500) 0%, var(--color-error-600) 100%);
  color: white;
}

.btn-danger:hover {
  background: linear-gradient(135deg, var(--color-error-600) 0%, #b91c1c 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  font-family: var(--font-family);
  font-weight: 500;
  font-size: var(--font-size-sm);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-primary-500);
  cursor: pointer;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  text-decoration: none;
  white-space: nowrap;
  background: transparent;
  color: var(--color-primary-600);
}

.btn-outline:hover {
  background: var(--color-primary-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}