/* ============================================
   PROFESSIONAL THEME - Material Design Inspired
   ============================================ */

/* ===== CSS Variables - Design Tokens ===== */
:root {
  /* Primary Colors */
  --color-primary: #1e40af;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1e3a8a;
  --color-primary-50: #eff6ff;
  
  /* Secondary Colors */
  --color-secondary: #059669;
  --color-secondary-light: #10b981;
  --color-secondary-dark: #047857;
  
  /* Neutral Colors */
  --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;
  
  /* Status Colors */
  --color-success: #059669;
  --color-success-light: #d1fae5;
  --color-success-dark:  #059668c9; 
  --color-warning: #f59e0b;
  --color-warning-light: #fef3c7;
  --color-error: #dc2626;
  --color-error-light: #fee2e2;
  --color-info: #3b82f6;
  --color-info-light: #dbeafe;
  
  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  
  /* 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);
  
  /* 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);
}

/* ===== Global Resets ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-sans);
  background-color: var(--color-gray-50);
  color: var(--color-gray-900);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Layout ===== */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-header {
  background: white;
  border-bottom: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-content {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.app-logo {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
}

.app-nav {
  display: flex;
  gap: var(--spacing-sm);
}

.nav-link {
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: var(--color-gray-700);
  font-weight: 500;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav-link:hover {
  background: var(--color-gray-100);
  color: var(--color-primary);
}

.nav-link.active {
  background: var(--color-primary-50);
  color: var(--color-primary);
}

.user-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-left: var(--spacing-md);
  padding-left: var(--spacing-md);
  border-left: 1px solid var(--color-gray-300);
}

.user-name {
  color: var(--color-gray-700);
  font-weight: 600;
  font-size: 14px;
}

.btn-logout {
  padding: var(--spacing-sm);
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-gray-600);
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
}

.btn-logout:hover {
  background: var(--color-gray-100);
  color: var(--color-error);
}

.btn-logout .icon {
  width: 20px;
  height: 20px;
}

.app-main {
  flex: 1;
  max-width: 1400px;
  width: 100%;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

/* ===== Cards ===== */
.card {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

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

.card-header {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-bottom: 1px solid var(--color-gray-200);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-gray-900);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.card-body {
  padding: var(--spacing-xl);
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  border-left: 4px solid var(--color-primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.stat-card.success {
  border-left-color: var(--color-success);
}

.stat-card.warning {
  border-left-color: var(--color-warning);
}

.stat-card.info {
  border-left-color: var(--color-info);
}

.stat-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-change {
  font-size: 0.875rem;
  margin-top: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.stat-change.positive {
  color: var(--color-success);
}

.stat-change.negative {
  color: var(--color-error);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
  background: var(--color-gray-50);
  color: var(--color-gray-700);
  border-color: var(--color-gray-400);
  box-shadow: var(--shadow-sm);
}

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

.btn-success:hover:not(:disabled) {
  background: var(--color-success-dark);
  color: white;
  box-shadow: var(--shadow-md);
}

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

.btn-danger:hover:not(:disabled) {
  background: #b91c1c;
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-sm {
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
}

.btn-lg {
  padding: 0.875rem 1.5rem;
  font-size: 1rem;
}

/* ===== Table ===== */
.table-container {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

table {
  width: 100%;
  border-collapse: collapse;
  background: white;
}

thead {
  background: var(--color-gray-50);
  border-bottom: 2px solid var(--color-gray-200);
}

th {
  padding: var(--spacing-md) var(--spacing-lg);
  text-align: left;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-gray-700);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

td {
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-gray-200);
  color: var(--color-gray-700);
}

tbody tr {
  transition: background-color var(--transition-fast);
}

tbody tr:hover {
  background: var(--color-gray-50);
}

/* ===== Badges ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1;
  border-radius: 9999px;
  white-space: nowrap;
}

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

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

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

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

.badge-gray {
  background: var(--color-gray-100);
  color: var(--color-gray-700);
}

/* ===== Action Buttons ===== */
.action-buttons {
  display: flex;
  gap: var(--spacing-sm);
  align-items: center;
}

/* ===== Empty States ===== */
.empty-state {
  text-align: center;
  padding: var(--spacing-2xl);
  color: var(--color-gray-500);
}

.empty-state svg {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-lg);
  color: var(--color-gray-300);
}

.empty-state h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-gray-700);
  margin-bottom: var(--spacing-sm);
}

.empty-state p {
  color: var(--color-gray-500);
}

/* ===== Icons (using SVG) ===== */
.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.icon-sm {
  width: 16px;
  height: 16px;
}

.icon-lg {
  width: 24px;
  height: 24px;
}

/* ===== Utilities ===== */
.text-sm {
  font-size: 0.875rem;
}

.text-xs {
  font-size: 0.75rem;
}

.text-lg {
  font-size: 1.125rem;
}

.font-mono {
  font-family: var(--font-mono);
}

.font-medium {
  font-weight: 500;
}

.font-semibold {
  font-weight: 600;
}

.font-bold {
  font-weight: 700;
}

.text-gray-500 {
  color: var(--color-gray-500);
}

.text-gray-700 {
  color: var(--color-gray-700);
}

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

.mb-4 {
  margin-bottom: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-lg);
}