/* ===== DESIGN SYSTEM ===== */
:root {
  /* Colors - Modern Gradient Palette */
  --primary-50: #f0f4ff;
  --primary-100: #e0e7ff;
  --primary-200: #c7d2fe;
  --primary-300: #a5b4fc;
  --primary-400: #818cf8;
  --primary-500: #6366f1;
  --primary-600: #4f46e5;
  --primary-700: #4338ca;
  --primary-800: #3730a3;
  --primary-900: #312e81;
  
  /* Accent Colors */
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  
  --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;
  
  --success-50: #ecfdf5;
  --success-500: #10b981;
  --success-600: #059669;
  
  --warning-50: #fffbeb;
  --warning-500: #f59e0b;
  --warning-600: #d97706;
  
  --error-50: #fef2f2;
  --error-500: #ef4444;
  --error-600: #dc2626;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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;
  
  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* Shadows - Enhanced */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-colored: 0 10px 25px -5px rgb(99 102 241 / 0.3);
  --shadow-glow: 0 0 20px rgb(99 102 241 / 0.4);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-normal: 250ms ease-in-out;
  --transition-slow: 350ms 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;
  --z-toast: 1080;
}

/* ===== RESET & BASE ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--gray-50);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-purple) 50%, var(--primary-700) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
  overflow: hidden;
}

.loading-screen::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  animation: rotate 20s linear infinite;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}

.loading-content {
  text-align: center;
  color: white;
}

.loading-logo {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  animation: pulse 2s infinite;
  position: relative;
  z-index: 1;
  background: linear-gradient(45deg, #fff, #e0e7ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.loading-text {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--space-8);
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(255, 255, 255, 0.3);
  border-top: 3px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

/* ===== APP CONTAINER ===== */
.app-container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
}

/* ===== HEADER ===== */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid var(--gray-200);
  z-index: var(--z-fixed);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 0 var(--space-4);
}

.header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.menu-toggle {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--gray-600);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.menu-toggle:hover {
  background-color: var(--gray-100);
  color: var(--primary-600);
}

.app-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.app-logo i {
  font-size: var(--font-size-xl);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.notification-btn {
  position: relative;
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--gray-600);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.notification-btn:hover {
  background-color: var(--gray-100);
  color: var(--primary-600);
}

.notification-badge {
  position: absolute;
  top: 2px;
  right: 2px;
  background: var(--error-500);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--radius-full);
  min-width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.user-avatar {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 2px solid var(--gray-200);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.user-avatar:hover {
  border-color: var(--primary-500);
  transform: scale(1.05);
}

.user-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== SIDEBAR ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100vh;
  background: white;
  box-shadow: var(--shadow-xl);
  z-index: var(--z-modal);
  transition: left var(--transition-normal);
  overflow-y: auto;
}

.sidebar.open {
  left: 0;
}

.sidebar-content {
  padding: var(--space-6) 0;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  margin-bottom: var(--space-8);
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: var(--font-size-lg);
  color: var(--primary-600);
}

.sidebar-close {
  background: none;
  border: none;
  font-size: var(--font-size-lg);
  color: var(--gray-400);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.sidebar-close:hover {
  background-color: var(--gray-100);
  color: var(--gray-600);
}

.sidebar-menu {
  list-style: none;
  flex: 1;
  padding: 0 var(--space-4);
}

.menu-item {
  margin-bottom: var(--space-1);
}

.menu-link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-lg);
  color: var(--gray-600);
  text-decoration: none;
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
}

.menu-link:hover {
  background-color: var(--gray-100);
  color: var(--primary-600);
}

.menu-item.active .menu-link {
  background-color: var(--primary-50);
  color: var(--primary-600);
}

.menu-link i {
  font-size: var(--font-size-lg);
  width: 20px;
  text-align: center;
}

.menu-badge {
  background: var(--error-500);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-left: auto;
}

.sidebar-footer {
  padding: var(--space-4);
  border-top: 1px solid var(--gray-200);
}

.logout-btn {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: none;
  border: none;
  border-radius: var(--radius-lg);
  color: var(--error-600);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.logout-btn:hover {
  background-color: var(--error-50);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1;
  margin-top: 60px;
  margin-bottom: 80px;
  padding: var(--space-6) var(--space-4);
  position: relative;
}

.screen {
  display: none;
  animation: fadeInUp var(--transition-normal);
}

.screen.active {
  display: block;
}

.screen-header {
  margin-bottom: var(--space-8);
}

.screen-title {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-2);
}

.screen-subtitle {
  color: var(--gray-500);
  font-size: var(--font-size-lg);
}

/* ===== DASHBOARD ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.stat-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
}

.stat-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.1) 0%, transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.stat-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

.stat-card:hover::after {
  opacity: 1;
}

.stat-card .stat-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-sm);
}

.stat-card .stat-icon i {
  font-size: var(--font-size-xl);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.stat-label {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

/* ===== QUICK ACTIONS ===== */
.section-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-6);
}

.quick-actions {
  margin-bottom: var(--space-8);
}

.actions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.action-btn {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  color: var(--gray-700);
  position: relative;
  overflow: hidden;
}

.action-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.1), transparent);
  transition: left 0.5s;
}

.action-btn:hover {
  border-color: var(--primary-500);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  transform: translateY(-4px) scale(1.05);
  box-shadow: var(--shadow-xl);
}

.action-btn:hover::before {
  left: 100%;
}

.action-btn i {
  font-size: var(--font-size-2xl);
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
  z-index: 1;
}

.action-btn span {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

/* ===== ACTIVITY LIST ===== */
.recent-activity {
  margin-bottom: var(--space-8);
}

.activity-list {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  overflow: hidden;
}

.activity-item {
  padding: var(--space-4);
  border-bottom: 1px solid var(--gray-100);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  transition: background-color var(--transition-fast);
}

.activity-item:last-child {
  border-bottom: none;
}

.activity-item:hover {
  background-color: var(--gray-50);
}

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

.activity-icon.success {
  background: var(--success-50);
  color: var(--success-600);
}

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

.activity-icon.info {
  background: var(--primary-50);
  color: var(--primary-600);
}

.activity-content {
  flex: 1;
}

.activity-title {
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.activity-description {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
}

.activity-time {
  color: var(--gray-400);
  font-size: var(--font-size-xs);
  white-space: nowrap;
}

/* ===== VEHICLES LIST ===== */
.vehicles-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.vehicle-card {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  padding: var(--space-6);
  transition: all var(--transition-normal);
}

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

.vehicle-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-4);
}

.vehicle-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.vehicle-plate {
  background: var(--primary-500);
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.vehicle-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.vehicle-detail {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.vehicle-detail-label {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
  font-weight: 500;
}

.vehicle-detail-value {
  color: var(--gray-900);
  font-weight: 600;
}

.vehicle-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
}

.vehicle-status.good {
  background: var(--success-50);
  color: var(--success-600);
}

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

.vehicle-status.danger {
  background: var(--error-50);
  color: var(--error-600);
}

/* ===== FORMS ===== */
.kilometrage-form {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  padding: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-6);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: 600;
  color: var(--gray-700);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-base);
  transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-50);
}

/* ===== BUTTONS ===== */
.btn-primary {
  background: var(--primary-500);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
}

.btn-primary:hover {
  background: var(--primary-600);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

/* ===== BOTTOM NAVIGATION ===== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: rgba(255, 255, 255, 0.95);
  border-top: 1px solid var(--gray-200);
  display: flex;
  z-index: var(--z-fixed);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

.nav-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  background: none;
  border: none;
  color: var(--gray-400);
  cursor: pointer;
  transition: all var(--transition-fast);
  padding: var(--space-2);
  position: relative;
}

.nav-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-500), var(--accent-purple));
  border-radius: 0 0 var(--radius-full) var(--radius-full);
  transition: width var(--transition-normal);
}

.nav-item.active {
  color: var(--primary-600);
}

.nav-item.active::before {
  width: 30px;
}

.nav-item:hover {
  color: var(--primary-500);
  background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
  transform: translateY(-2px);
}

.nav-item i {
  font-size: var(--font-size-lg);
}

.nav-item span {
  font-size: var(--font-size-xs);
  font-weight: 500;
}

/* ===== OVERLAY ===== */
.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: var(--z-modal-backdrop);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.overlay.active {
  opacity: 1;
  visibility: visible;
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
  position: fixed;
  top: 80px;
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.toast {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  box-shadow: var(--shadow-lg);
  border-left: 4px solid var(--primary-500);
  min-width: 300px;
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal);
}

.toast.show {
  transform: translateX(0);
  opacity: 1;
}

.toast.success {
  border-left-color: var(--success-500);
}

.toast.warning {
  border-left-color: var(--warning-500);
}

.toast.error {
  border-left-color: var(--error-500);
}

.toast-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.toast-icon {
  font-size: var(--font-size-lg);
  margin-top: 2px;
}

.toast.success .toast-icon {
  color: var(--success-500);
}

.toast.warning .toast-icon {
  color: var(--warning-500);
}

.toast.error .toast-icon {
  color: var(--error-500);
}

.toast-message {
  flex: 1;
}

.toast-title {
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.toast-description {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes slideInLeft {
  from {
    transform: translateX(-100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutLeft {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(-100%);
    opacity: 0;
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0, 0, 0);
  }
  40%, 43% {
    transform: translate3d(0, -10px, 0);
  }
  70% {
    transform: translate3d(0, -5px, 0);
  }
  90% {
    transform: translate3d(0, -2px, 0);
  }
}

@keyframes shimmer {
  0% {
    background-position: -200px 0;
  }
  100% {
    background-position: calc(200px + 100%) 0;
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 5px var(--primary-500);
  }
  50% {
    box-shadow: 0 0 20px var(--primary-500), 0 0 30px var(--primary-500);
  }
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ===== UTILITY CLASSES ===== */
.glass-effect {
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.floating {
  animation: float 3s ease-in-out infinite;
}

.bounce-in {
  animation: bounce 0.6s ease-in-out;
}

.shimmer {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200px 100%;
  animation: shimmer 1.5s infinite;
}

.glow-effect {
  animation: glow 2s ease-in-out infinite alternate;
}

.pulse-effect {
  animation: pulse 2s infinite;
}

/* ===== ENHANCED COMPONENTS ===== */
.vehicle-card {
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
  padding: var(--space-6);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.vehicle-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-emerald), var(--accent-blue));
}

.vehicle-card:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-300);
}

.vehicle-plate {
  background: linear-gradient(135deg, var(--primary-600), var(--accent-purple));
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-sm);
  box-shadow: var(--shadow-sm);
}

/* Enhanced Form Elements */
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px var(--primary-50);
  transform: translateY(-1px);
}

/* Enhanced Button */
.btn-primary {
  background: linear-gradient(135deg, var(--primary-500), var(--primary-600));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--primary-600), var(--primary-700));
  transform: translateY(-2px);
  box-shadow: var(--shadow-colored);
}

.btn-primary:hover::before {
  left: 100%;
}

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

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .actions-grid {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .vehicle-details {
    grid-template-columns: repeat(4, 1fr);
  }
  
  .main-content {
    padding: var(--space-8);
  }
  
  .sidebar {
    position: static;
    left: 0;
    transform: none;
    box-shadow: none;
    border-right: 1px solid var(--gray-200);
  }
  
  .app-container {
    flex-direction: row;
  }
  
  .main-content {
    margin-top: 0;
    margin-left: 280px;
  }
  
  .bottom-nav {
    display: none;
  }
}

@media (min-width: 1024px) {
  .main-content {
    padding: var(--space-10);
  }
}

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --gray-50: #111827;
    --gray-100: #1f2937;
    --gray-200: #374151;
    --gray-300: #4b5563;
    --gray-400: #6b7280;
    --gray-500: #9ca3af;
    --gray-600: #d1d5db;
    --gray-700: #e5e7eb;
    --gray-800: #f3f4f6;
    --gray-900: #f9fafb;
  }
  
  body {
    background-color: var(--gray-50);
    color: var(--gray-800);
  }
  
  .app-header,
  .sidebar,
  .stat-card,
  .vehicle-card,
  .kilometrage-form,
  .activity-list,
  .bottom-nav {
    background: var(--gray-100);
    border-color: var(--gray-200);
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus styles for better accessibility */
button:focus,
input:focus,
select:focus,
.menu-link:focus,
.nav-item:focus {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .stat-card,
  .vehicle-card,
  .action-btn {
    border-width: 2px;
  }
  
  .btn-primary {
    border: 2px solid var(--primary-700);
  }
}

/* ===== ENHANCED VEHICLE CARDS ===== */
.vehicle-image {
  width: 100%;
  height: 200px;
  border-radius: var(--radius-lg);
  object-fit: cover;
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.vehicle-card:hover .vehicle-image {
  transform: scale(1.05);
}

.vehicle-image-placeholder {
  width: 100%;
  height: 200px;
  background: linear-gradient(135deg, var(--gray-100), var(--gray-200));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--gray-400);
  font-size: var(--font-size-2xl);
}

/* ===== VIDANGES STYLES ===== */
.vidange-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
  padding: var(--space-4);
  background: white;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
}

.vidange-stats .stat-item {
  text-align: center;
  padding: var(--space-3);
}

.vidange-stats .stat-number {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--primary-600);
  margin-bottom: var(--space-1);
}

.vidange-stats .stat-label {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  font-weight: 500;
}

.vidange-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  margin-bottom: var(--space-4);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  position: relative;
}

.vidange-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-emerald), var(--accent-blue));
  border-radius: var(--radius-full) 0 0 var(--radius-full);
}

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

.vidange-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-3);
}

.vidange-date {
  color: var(--gray-600);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.vidange-amount {
  background: linear-gradient(135deg, var(--accent-emerald), var(--accent-blue));
  color: white;
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  font-weight: 700;
  font-size: var(--font-size-sm);
}

.vidange-details {
  display: flex;
  gap: var(--space-4);
  margin-bottom: var(--space-3);
}

.vidange-kilometrage,
.vidange-type,
.vidange-vehicle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-600);
  font-size: var(--font-size-sm);
}

.vidange-kilometrage i,
.vidange-type i,
.vidange-vehicle i {
  color: var(--primary-500);
}

.vidange-note {
  color: var(--gray-500);
  font-style: italic;
  font-size: var(--font-size-sm);
  padding: var(--space-2);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--primary-500);
}

/* ===== PROFILE STYLES ===== */
.profile-header-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.profile-avatar-container {
  position: relative;
}

.profile-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 3px solid var(--primary-200);
  position: relative;
}

.profile-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.avatar-status {
  position: absolute;
  bottom: 5px;
  right: 5px;
  width: 16px;
  height: 16px;
  border-radius: var(--radius-full);
  border: 2px solid white;
}

.avatar-status.online {
  background: var(--accent-emerald);
}

.avatar-edit-btn {
  position: absolute;
  bottom: -5px;
  right: -5px;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  background: var(--primary-500);
  color: white;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.avatar-edit-btn:hover {
  background: var(--primary-600);
  transform: scale(1.1);
}

.profile-info h3 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.user-role-badge {
  background: linear-gradient(135deg, var(--primary-500), var(--accent-purple));
  color: white;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 600;
  display: inline-block;
  margin-bottom: var(--space-2);
}

.user-contact {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: var(--gray-600);
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-1);
}

.user-contact i {
  color: var(--primary-500);
  width: 16px;
}

.profile-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.profile-stat-item {
  background: white;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-normal);
}

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

.profile-stat-item .stat-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-2);
}

.profile-stat-item .stat-icon i {
  color: var(--primary-600);
  font-size: var(--font-size-lg);
}

.profile-stat-item .stat-number {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--space-1);
}

.profile-stat-item .stat-label {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  font-weight: 500;
}

.section-subtitle {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--space-4);
}

.action-buttons-grid {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.profile-action-btn {
  background: white;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: left;
  width: 100%;
}

.profile-action-btn:hover {
  border-color: var(--primary-300);
  background: var(--primary-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.action-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-100), var(--primary-200));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.action-icon i {
  color: var(--primary-600);
  font-size: var(--font-size-base);
}

.action-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.action-title {
  font-weight: 600;
  color: var(--gray-900);
  font-size: var(--font-size-base);
}

.action-subtitle {
  color: var(--gray-500);
  font-size: var(--font-size-sm);
}

.profile-action-btn i:last-child {
  color: var(--gray-400);
  font-size: var(--font-size-sm);
}

.logout-section {
  margin-top: var(--space-6);
}

.logout-btn-large {
  width: 100%;
  background: linear-gradient(135deg, var(--error-500), var(--error-600));
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-weight: 600;
  font-size: var(--font-size-base);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.logout-btn-large:hover {
  background: linear-gradient(135deg, var(--error-600), var(--error-700));
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 480px) {
  .profile-header-card {
    flex-direction: column;
    text-align: center;
  }
  
  .profile-stats,
  .vidange-stats {
    grid-template-columns: 1fr;
    gap: var(--space-3);
  }
  
  .vehicle-image {
    height: 150px;
  }
}