/* ==========================================
   Compass - Modern UI Stylesheet
   Machine Troubleshooting Resource Management
   ========================================== */

/* ==========================================
   1. ROOT VARIABLES & THEME
   ========================================== */
:root {
  /* Primary Color Palette */
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --primary-light: #818cf8;
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Secondary Colors */
  --secondary-color: #ec4899;
  --accent-color: #14b8a6;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --info-color: #3b82f6;
  
  /* Neutral Colors */
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-tertiary: #f1f5f9;
  --bg-dark: #0f172a;
  
  /* Text Colors */
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --text-white: #ffffff;
  
  /* 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);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
}

/* ==========================================
   2. GLOBAL STYLES
   ========================================== */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-secondary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: 76px; /* Account for fixed navbar */
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-lg);
}

h2 {
  font-size: 2rem;
  font-weight: 700;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--gray-800);
}

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

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

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

/* ==========================================
   3. NAVIGATION BAR
   ========================================== */
.navbar {
  background: var(--primary-gradient) !important;
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-lg);
  padding: 0.75rem 0;
  transition: all var(--transition-base);
  z-index: 1000;
}

.navbar-brand {
  font-weight: 700;
  font-size: 1.5rem;
  color: var(--text-white) !important;
  transition: transform var(--transition-fast);
  display: flex;
  align-items: center;
}

.navbar-brand:hover {
  transform: scale(1.05);
}

.brand-text {
  font-weight: 800;
  letter-spacing: -0.5px;
}

.navbar-brand img {
  border-radius: var(--radius-md);
  transition: transform var(--transition-fast);
}

.navbar-brand:hover img {
  transform: rotate(5deg) scale(1.1);
}

.nav-link {
  color: rgba(255, 255, 255, 0.85) !important;
  font-weight: 500;
  padding: 0.5rem 1rem !important;
  margin: 0 0.25rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-white) !important;
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.nav-link.active {
  color: var(--text-white) !important;
  background: rgba(255, 255, 255, 0.2);
  font-weight: 600;
}

.nav-link i {
  font-size: 0.875rem;
}

/* Dropdown Menu */
.dropdown-menu {
  background: var(--bg-primary);
  border: none;
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  margin-top: 0.5rem;
}

.dropdown-item {
  padding: 0.75rem 1.25rem;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--primary-color);
  color: var(--text-white);
}

.dropdown-item i {
  width: 20px;
  text-align: center;
}

.navbar .dropdown-menu {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
}

/* ==========================================
   4. MAIN CONTENT
   ========================================== */
.main-content {
  flex: 1;
  padding: var(--spacing-xl) 0;
  min-height: calc(100vh - 200px);
}

/* ==========================================
   5. CARDS
   ========================================== */
.card {
  background: var(--bg-primary);
  border: none;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  overflow: hidden;
}


.card-img-top {
  border-radius: 0;
}

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

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.card-link {
  color: var(--primary-color);
  font-weight: 500;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
}

.card-link:hover {
  color: var(--primary-dark);
  background: var(--gray-100);
  transform: translateX(4px);
}

/* ==========================================
   6. TABLES
   ========================================== */
.table {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.table thead {
  background: var(--primary-gradient);
  color: var(--text-white);
}

.table thead th {
  border: none;
  padding: 1rem 1.5rem;
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.875rem;
  letter-spacing: 0.5px;
}

.table tbody tr {
  transition: all var(--transition-fast);
  border-bottom: 1px solid var(--gray-200);
}

.table tbody tr:hover {
  background: var(--gray-50);
  transform: scale(1.01);
}

.table tbody td {
  padding: 1rem 1.5rem;
  vertical-align: middle;
  color: var(--text-secondary);
}

.table tbody tr:last-child {
  border-bottom: none;
}

/* ==========================================
   7. FORMS
   ========================================== */
.form-control, .form-select {
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.form-control:focus, .form-select:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  outline: none;
}

.form-label {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: 0.95rem;
}

.control-label {
  font-weight: 600;
  color: var(--text-primary);
  display: block;
  margin-bottom: var(--spacing-xs);
}

.control-group {
  margin-bottom: var(--spacing-md);
}

.controls {
  margin-top: var(--spacing-xs);
}

.controls input,
.controls select,
.controls textarea {
  width: 100%;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.controls input:focus,
.controls select:focus,
.controls textarea:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  outline: none;
}

.help-inline {
  display: block;
  margin-top: var(--spacing-xs);
  color: var(--text-muted);
  font-size: 0.875rem;
}

.control-group.error .controls input,
.control-group.error .controls select,
.control-group.error .controls textarea {
  border-color: var(--danger-color);
}

.control-group.error .help-inline {
  color: var(--danger-color);
  font-weight: 500;
}

/* ==========================================
   8. BUTTONS
   ========================================== */
.btn {
  padding: 0.75rem 1.5rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  border: none;
  font-size: 1rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  opacity: 0.9;
}

.btn-secondary {
  background: var(--gray-200);
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: var(--gray-300);
  transform: translateY(-2px);
}

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

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

.btn-link {
  color: var(--primary-color);
  padding: 0.5rem 1rem;
}

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

/* ==========================================
   9. ALERTS
   ========================================== */
.alert {
  border: none;
  border-radius: var(--radius-lg);
  padding: 1rem 1.5rem;
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-md);
}

.alert-success {
  background: linear-gradient(135deg, #d4edda 0%, #c3e6cb 100%);
  color: #155724;
}

.alert-danger {
  background: linear-gradient(135deg, #f8d7da 0%, #f5c6cb 100%);
  color: #721c24;
}

.alert-warning {
  background: linear-gradient(135deg, #fff3cd 0%, #ffeaa7 100%);
  color: #856404;
}

.alert-info {
  background: linear-gradient(135deg, #d1ecf1 0%, #bee5eb 100%);
  color: #0c5460;
}

/* ==========================================
   10. BADGES
   ========================================== */
.badge {
  padding: 0.5rem 1rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
}

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

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

.badge-warning {
  background: var(--warning-color);
  color: var(--text-white);
}

.badge-danger {
  background: var(--danger-color);
  color: var(--text-white);
}

/* ==========================================
   11. FOOTER
   ========================================== */
.footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--gray-200);
  margin-top: auto;
  padding: 2rem 0;
}

.footer a {
  transition: all var(--transition-fast);
}

.footer a:hover {
  color: var(--primary-color) !important;
  transform: translateX(4px);
}

/* ==========================================
   12. HERO SECTION
   ========================================== */
.hero {
  background: var(--primary-gradient);
  color: var(--text-white);
  padding: var(--spacing-2xl) 0;
  border-radius: var(--radius-2xl);
  margin-bottom: var(--spacing-xl);
  box-shadow: var(--shadow-2xl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 120"><path d="M0,0V46.29c47.79,22.2,103.59,32.17,158,28,70.36-5.37,136.33-33.31,206.8-37.5C438.64,32.43,512.34,53.67,583,72.05c69.27,18,138.3,24.88,209.4,13.08,36.15-6,69.85-17.84,104.45-29.34C989.49,25,1113-14.29,1200,52.47V0Z" opacity=".25" fill="%23ffffff"/><path d="M0,0V15.81C13,36.92,27.64,56.86,47.69,72.05,99.41,111.27,165,111,224.58,91.58c31.15-10.15,60.09-26.07,89.67-39.8,40.92-19,84.73-46,130.83-49.67,36.26-2.85,70.9,9.42,98.6,31.56,31.77,25.39,62.32,62,103.63,73,40.44,10.79,81.35-6.69,119.13-24.28s75.16-39,116.92-43.05c59.73-5.85,113.28,22.88,168.9,38.84,30.2,8.66,59,6.17,87.09-7.5,22.43-10.89,48-26.93,60.65-49.24V0Z" opacity=".5" fill="%23ffffff"/><path d="M0,0V5.63C149.93,59,314.09,71.32,475.83,42.57c43-7.64,84.23-20.12,127.61-26.46,59-8.63,112.48,12.24,165.56,35.4C827.93,77.22,886,95.24,951.2,90c86.53-7,172.46-45.71,248.8-84.81V0Z" fill="%23ffffff"/></svg>') no-repeat center bottom;
  background-size: cover;
  opacity: 0.1;
}

.hero h1 {
  color: var(--text-white);
  background: none;
  -webkit-text-fill-color: currentColor;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 800px;
}

/* ==========================================
   13. FEATURE CARDS
   ========================================== */
.feature-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-base);
  border: 2px solid transparent;
  height: 100%;
}

.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: var(--primary-gradient);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-md);
  font-size: 1.75rem;
  color: var(--text-white);
  box-shadow: var(--shadow-lg);
}

.feature-card h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ==========================================
   14. IMAGE WRAPPERS
   ========================================== */
.img-wrapper {
  position: relative;
  overflow: hidden;
  height: 300px;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-wrapper img {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  min-width: 100%;
  min-height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.img-wrapper:hover img {
  transform: translate(-50%, -50%) scale(1.1);
}

/* ==========================================
   15. RESPONSIVE UTILITIES
   ========================================== */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .navbar-brand {
    font-size: 1.25rem;
  }
  
  .main-content {
    padding: var(--spacing-md) 0;
  }
  
  body {
    padding-top: 60px;
  }
}

/* ==========================================
   16. LOADING SPINNER
   ========================================== */
.spinner {
  border: 3px solid rgba(99, 102, 241, 0.1);
  border-top: 3px solid var(--primary-color);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ==========================================
   17. SEARCH BOX
   ========================================== */
.search-box {
  position: relative;
  margin-bottom: var(--spacing-lg);
}

.search-box input {
  width: 100%;
  padding: 1rem 1rem 1rem 3rem;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-lg);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background: var(--bg-primary);
}

.search-box input:focus {
  border-color: var(--primary-color);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.1);
  outline: none;
}

.search-box i {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}

/* ==========================================
   18. STATS CARDS
   ========================================== */
.stat-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border-left: 4px solid var(--primary-color);
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.95rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ==========================================
   19. BREADCRUMBS
   ========================================== */
.breadcrumb {
  background: transparent;
  padding: var(--spacing-sm) 0;
  margin-bottom: var(--spacing-lg);
}

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

.breadcrumb-item.active {
  color: var(--text-primary);
  font-weight: 600;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '›';
  color: var(--text-muted);
  font-size: 1.25rem;
}

/* ==========================================
   20. ANIMATIONS
   ========================================== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ==========================================
   21. UTILITY CLASSES
   ========================================== */
.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.shadow-strong {
  box-shadow: var(--shadow-xl);
}

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

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