/* ============================================
   MioCarWash - Global Styles (Grupo 10)
   UI/UX Final y Optimización
   ============================================ */

/* CSS Custom Properties (Variables) */
:root {
  /* Colors - Primary */
  --primary-color: #667eea;
  --primary-light: rgba(102, 126, 234, 0.1);
  --primary-dark: #5a67d8;
  --primary-gradient: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
  
  /* Colors - Status */
  --success-color: #10b981;
  --success-light: rgba(16, 185, 129, 0.1);
  --warning-color: #f59e0b;
  --warning-light: rgba(245, 158, 11, 0.1);
  --error-color: #ef4444;
  --error-light: rgba(239, 68, 68, 0.1);
  --info-color: #6366f1;
  --info-light: rgba(99, 102, 241, 0.1);
  
  /* Colors - Text */
  --text-primary: #1a202c;
  --text-secondary: #718096;
  --text-muted: #a0aec0;
  --text-light: #ffffff;
  
  /* Colors - Background */
  --bg-primary: #f7fafc;
  --bg-secondary: #edf2f7;
  --bg-tertiary: #e2e8f0;
  --card-bg: #ffffff;
  --input-bg: #ffffff;
  --border-color: #e2e8f0;
  --border-light: #f7fafc;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 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);
  --shadow-hover: var(--shadow-xl);
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 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;
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  
  /* Borders */
  --border-width: 1px;
  --border-radius-sm: 4px;
  --border-radius: 8px;
  --border-radius-md: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 20px;
  --border-radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms;
  --transition-normal: 250ms;
  --transition-slow: 350ms;
  --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* Z-index layers */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  --z-notification: 1080;
  --z-loading: 1090;
  
  /* Breakpoints (for reference) */
  --bp-sm: 640px;
  --bp-md: 768px;
  --bp-lg: 1024px;
  --bp-xl: 1280px;
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
  :root {
    --text-primary: #f7fafc;
    --text-secondary: #a0aec0;
    --bg-primary: #1a202c;
    --bg-secondary: #2d3748;
    --bg-tertiary: #4a5568;
    --card-bg: #2d3748;
    --input-bg: #1a202c;
    --border-color: #4a5568;
    --border-light: #2d3748;
  }
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: var(--line-height-tight);
  color: var(--text-primary);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-sm); }

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

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

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

/* Layout */
.main-content {
  min-height: calc(100vh - 200px);
  padding: var(--space-xl) var(--space-lg);
  margin-top: 80px; /* Space for fixed navbar */
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ============================================
   Loading Overlay (Enhanced)
   ============================================ */

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-loading);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal) var(--transition-timing);
}

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

.loading-spinner {
  background: var(--card-bg);
  padding: var(--space-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  font-size: var(--font-size-lg);
  font-weight: 500;
  color: var(--text-primary);
  text-align: center;
  min-width: 250px;
}

.loading-spinner::before {
  content: '';
  width: 50px;
  height: 50px;
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Skeleton Loader */
.skeleton {
  background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-tertiary) 50%, var(--bg-secondary) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: var(--border-radius-md);
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.skeleton-text {
  height: 1em;
  width: 80%;
  margin-bottom: var(--space-sm);
}

.skeleton-card {
  height: 200px;
  border-radius: var(--border-radius-lg);
}

/* ============================================
   Notifications (Enhanced)
   ============================================ */

.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--card-bg);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-lg);
  min-width: 300px;
  max-width: 400px;
  z-index: var(--z-notification);
  transform: translateX(100%);
  opacity: 0;
  transition: all var(--transition-normal) var(--transition-timing);
  border-left: 4px solid var(--info-color);
}

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

.notification-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.notification-message {
  flex: 1;
  color: var(--text-primary);
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
}

.notification-close {
  background: none;
  border: none;
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color var(--transition-fast) var(--transition-timing);
}

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

/* Notification Types */
.notification.success {
  border-left-color: var(--success-color);
  background: linear-gradient(to right, var(--success-light), var(--card-bg));
}

.notification.error {
  border-left-color: var(--error-color);
  background: linear-gradient(to right, var(--error-light), var(--card-bg));
}

.notification.warning {
  border-left-color: var(--warning-color);
  background: linear-gradient(to right, var(--warning-light), var(--card-bg));
}

/* ============================================
   Buttons (Enhanced)
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border: none;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-md);
  font-weight: 600;
  font-family: var(--font-family);
  cursor: pointer;
  transition: all var(--transition-fast) var(--transition-timing);
  text-decoration: none;
  line-height: 1;
}

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

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

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.btn-primary {
  background: var(--primary-gradient);
  color: var(--text-light);
}

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

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-tertiary);
  border-color: var(--primary-color);
}

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

.btn-danger:hover:not(:disabled) {
  background: #dc2626; /* Darker red */
}

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

.btn-lg {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.btn-sm {
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
}

.btn-block {
  width: 100%;
}

.btn-loader {
  display: none;
}

.btn.loading .btn-loader {
  display: inline;
}

.btn.loading .btn-text {
  display: none;
}

/* ============================================
   Forms (Enhanced)
   ============================================ */

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 600;
  /*color: var(--text-primary);*/
  font-size: var(--font-size-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-md);
  font-family: var(--font-family);
  background: var(--input-bg);
  /*color: var(--text-primary); */
  transition: all var(--transition-fast) var(--transition-timing);
}

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

.form-group input.valid,
.form-group select.valid,
.form-group textarea.valid {
  border-color: var(--success-color);
}

.form-group input.invalid,
.form-group select.invalid,
.form-group textarea.invalid {
  border-color: var(--error-color);
}

.field-hint {
  font-size: var(--font-size-xs);
  color: var(--text-secondary);
  margin-top: var(--space-xs);
}

.field-error {
  font-size: var(--font-size-xs);
  color: var(--error-color);
  margin-top: var(--space-xs);
  display: none;
}

.checkbox-group {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.checkbox-group input[type="checkbox"] {
  width: auto;
  margin: 0;
}

/* ============================================
   Utility Classes
   ============================================ */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-success { color: var(--success-color) !important; }
.text-warning { color: var(--warning-color) !important; }
.text-error { color: var(--error-color) !important; }

.bg-primary { background-color: var(--primary-color) !important; }
.bg-success { background-color: var(--success-color) !important; }
.bg-warning { background-color: var(--warning-color) !important; }
.bg-error { background-color: var(--error-color) !important; }

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

.mt-0 { margin-top: 0 !important; }
.mb-0 { margin-bottom: 0 !important; }
.ml-0 { margin-left: 0 !important; }
.mr-0 { margin-right: 0 !important; }

.mt-1 { margin-top: var(--space-sm) !important; }
.mb-1 { margin-bottom: var(--space-sm) !important; }
.ml-1 { margin-left: var(--space-sm) !important; }
.mr-1 { margin-right: var(--space-sm) !important; }

.mt-2 { margin-top: var(--space-md) !important; }
.mb-2 { margin-bottom: var(--space-md) !important; }
.ml-2 { margin-left: var(--space-md) !important; }
.mr-2 { margin-right: var(--space-md) !important; }

.mt-3 { margin-top: var(--space-lg) !important; }
.mb-3 { margin-bottom: var(--space-lg) !important; }
.ml-3 { margin-left: var(--space-lg) !important; }
.mr-3 { margin-right: var(--space-lg) !important; }

.p-0 { padding: 0 !important; }
.p-1 { padding: var(--space-sm) !important; }
.p-2 { padding: var(--space-md) !important; }
.p-3 { padding: var(--space-lg) !important; }

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

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

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

/* ============================================
   App Footer (Enhanced)
   ============================================ */

.app-footer {
  background: var(--bg-secondary);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  margin-top: auto;
  border-top: 1px solid var(--border-color);
}

.app-footer p {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin: var(--space-xs) 0;
}

/* ============================================
   Responsive Utilities
   ============================================ */

@media (max-width: 768px) {
  .main-content {
    margin-top: 70px;
    padding: var(--space-lg) var(--space-sm);
  }
  
  .container {
    padding: 0 var(--space-sm);
  }
  
  .desktop-only {
    display: none !important;
  }
}

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

/* Print Styles */
@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
}

/* ============================================
   Accessibility
   ============================================ */

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border-width: 0 !important;
}

/* Focus styles for keyboard navigation */
*:focus {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}

button:focus,
input:focus,
select:focus,
textarea:focus,
a:focus {
  outline: 3px solid var(--primary-light);
  outline-offset: 2px;
}

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

/* ============================================
   Performance Optimizations
   ============================================ */

/* Optimize images */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Optimize fonts */
.font-loading {
  font-display: swap;
}

/* Reduce layout shifts */
.card,
.section,
.container {
  content-visibility: auto;
  contain-intrinsic-size: 500px;
}

/* Prefetch critical resources */
<link rel="prefetch" href="/dashboard.html" as="document">
<link rel="prefetch" href="/assets/css/dashboard.css" as="style">