/* Enhanced User Styles - Complete CSS Framework */

/* CSS Variables */
:root {
  /* Colors */
  --primary-color: #667eea;
  --primary-dark: #5a67d8;
  --secondary-color: #764ba2;
  --success-color: #28a745;
  --error-color: #dc3545;
  --warning-color: #ffc107;
  --info-color: #17a2b8;

  /* Text Colors */
  --text-primary: #2d3748;
  --text-secondary: #4a5568;
  --text-tertiary: #718096;
  --text-light: #a0aec0;

  /* Background Colors */
  --bg-primary: #ffffff;
  --bg-secondary: #f7fafc;
  --bg-tertiary: #edf2f7;
  --bg-dark: #2d3748;

  /* Border Colors */
  --border-color: #e2e8f0;
  --border-light: #f1f5f9;
  --border-dark: #cbd5e0;

  /* 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: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  font-size: 16px;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 600;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

h1 {
  font-size: 2.5rem;
}
h2 {
  font-size: 2rem;
}
h3 {
  font-size: 1.75rem;
}
h4 {
  font-size: 1.5rem;
}
h5 {
  font-size: 1.25rem;
}
h6 {
  font-size: 1rem;
}

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

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

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

/* Form Elements */
.user-form-group {
  margin-bottom: var(--spacing-lg);
}

.user-form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--text-primary);
  font-size: 0.875rem;
}

.user-form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-fast);
  background-color: var(--bg-primary);
  color: var(--text-primary);
}

.user-form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.user-form-control.error {
  border-color: var(--error-color);
  box-shadow: 0 0 0 3px rgba(220, 53, 69, 0.1);
}

.user-form-control::placeholder {
  color: var(--text-light);
}

.user-form-error {
  color: var(--error-color);
  font-size: 0.875rem;
  margin-top: var(--spacing-xs);
  display: block;
}

/* Buttons */
.user-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 44px;
  gap: var(--spacing-sm);
}

.user-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.user-btn-primary {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  border-color: var(--primary-color);
}

.user-btn-primary:hover:not(:disabled) {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #6b46c1 100%);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.user-btn-outline {
  background: transparent;
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.user-btn-outline:hover:not(:disabled) {
  background: var(--primary-color);
  color: white;
}

.user-btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border-color: var(--border-color);
}

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

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

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

/* Button Sizes */
.user-btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  min-height: 36px;
}

.user-btn-lg {
  padding: 1rem 2rem;
  font-size: 1.125rem;
  min-height: 52px;
}

.w-100 {
  width: 100%;
}

/* Cards */
.user-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

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

.user-card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}

.user-card-title {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.user-card-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.user-card-body {
  margin-bottom: var(--spacing-lg);
}

.user-card-footer {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-light);
}

/* Stats Cards */
.user-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.user-stat-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.user-stat-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

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

.user-stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
  display: block;
}

.user-stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Material Cards */
.user-materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.user-material-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
}

.user-material-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.user-material-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 3rem;
}

.user-material-content {
  padding: var(--spacing-lg);
}

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

.user-material-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.user-material-meta {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

.user-material-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* Navigation */
.user-nav {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.user-nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.user-nav-brand {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.user-nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-lg);
  margin: 0;
  padding: 0;
}

.user-nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.user-nav-link:hover,
.user-nav-link.active {
  color: var(--primary-color);
  background: rgba(102, 126, 234, 0.1);
  text-decoration: none;
}

/* Dropdown */
.user-dropdown {
  position: relative;
  display: inline-block;
}

.user-dropdown-menu {
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  min-width: 200px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-fast);
}

.user-dropdown-menu.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.user-dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  border-bottom: 1px solid var(--border-light);
}

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

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

/* Messages/Toasts */
.user-message-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 10000;
  max-width: 400px;
}

.user-message {
  background: var(--bg-primary);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  border-left: 4px solid var(--info-color);
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.user-message.show {
  transform: translateX(0);
}

.user-message-success {
  border-left-color: var(--success-color);
}

.user-message-error {
  border-left-color: var(--error-color);
}

.user-message-warning {
  border-left-color: var(--warning-color);
}

/* Loading States */
.user-loading {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid var(--border-light);
  border-top: 2px solid var(--primary-color);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

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

.loading-spinner {
  background: var(--bg-primary);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-xl);
}

/* Utilities */
.text-center {
  text-align: center;
}
.text-left {
  text-align: left;
}
.text-right {
  text-align: right;
}

.mt-1 {
  margin-top: var(--spacing-xs);
}
.mt-2 {
  margin-top: var(--spacing-sm);
}
.mt-3 {
  margin-top: var(--spacing-md);
}
.mt-4 {
  margin-top: var(--spacing-lg);
}
.mt-5 {
  margin-top: var(--spacing-xl);
}

.mb-1 {
  margin-bottom: var(--spacing-xs);
}
.mb-2 {
  margin-bottom: var(--spacing-sm);
}
.mb-3 {
  margin-bottom: var(--spacing-md);
}
.mb-4 {
  margin-bottom: var(--spacing-lg);
}
.mb-5 {
  margin-bottom: var(--spacing-xl);
}

.p-1 {
  padding: var(--spacing-xs);
}
.p-2 {
  padding: var(--spacing-sm);
}
.p-3 {
  padding: var(--spacing-md);
}
.p-4 {
  padding: var(--spacing-lg);
}
.p-5 {
  padding: var(--spacing-xl);
}

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

.justify-content-center {
  justify-content: center;
}
.justify-content-between {
  justify-content: space-between;
}
.align-items-center {
  align-items: center;
}

.gap-1 {
  gap: var(--spacing-xs);
}
.gap-2 {
  gap: var(--spacing-sm);
}
.gap-3 {
  gap: var(--spacing-md);
}
.gap-4 {
  gap: var(--spacing-lg);
}

/* Responsive Design */
@media (max-width: 768px) {
  .user-stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .user-materials-grid {
    grid-template-columns: 1fr;
  }

  .user-nav-container {
    padding: 0 var(--spacing-md);
  }

  .user-nav-menu {
    gap: var(--spacing-md);
  }

  .user-message-container {
    left: var(--spacing-md);
    right: var(--spacing-md);
    max-width: none;
  }

  h1 {
    font-size: 2rem;
  }
  h2 {
    font-size: 1.75rem;
  }
  h3 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .user-stats-grid {
    grid-template-columns: 1fr;
  }

  .user-btn {
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
  }

  .user-card {
    padding: var(--spacing-lg);
  }

  .user-material-content {
    padding: var(--spacing-md);
  }
}

/* Animation Classes */
.fade-in {
  animation: fadeIn 0.5s ease-in;
}

.fade-in-up {
  animation: fadeInUp 0.5s ease-out;
}

.slide-in-right {
  animation: slideInRight 0.3s ease-out;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

/* Focus Styles for Accessibility */
.user-btn:focus,
.user-form-control:focus,
.user-nav-link:focus,
.user-dropdown-item:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
  :root {
    --border-color: #000000;
    --text-secondary: #000000;
  }
}

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

/* Print Styles */
@media print {
  .user-nav,
  .user-btn,
  .user-message-container {
    display: none !important;
  }

  .user-card {
    box-shadow: none;
    border: 1px solid #000;
  }
}