/* ========================================
   MOBILE-FIRST CUSTOMER ACCOUNT REDESIGN
   ======================================== */

/* CSS Custom Properties (Design System) */
:root {
  /* Color Palette */
  --primary: #007bff;
  --primary-dark: #0056b3;
  --primary-light: #e3f2fd;
  --secondary: #6c757d;
  --success: #28a745;
  --warning: #ffc107;
  --danger: #dc3545;
  --info: #17a2b8;
  --light: #f8f9fa;
  --dark: #343a40;
  --white: #ffffff;

  /* Typography Scale */
  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */

  /* Spacing Scale */
  --spacing-xs: 0.25rem;  /* 4px */
  --spacing-sm: 0.5rem;   /* 8px */
  --spacing-md: 1rem;     /* 16px */
  --spacing-lg: 1.5rem;   /* 24px */
  --spacing-xl: 2rem;     /* 32px */
  --spacing-2xl: 3rem;    /* 48px */
  --spacing-3xl: 4rem;    /* 64px */

  /* Border Radius */
  --border-radius-sm: 0.25rem;  /* 4px */
  --border-radius-md: 0.5rem;   /* 8px */
  --border-radius-lg: 0.75rem;  /* 12px */
  --border-radius-xl: 1rem;     /* 16px */
  --border-radius-full: 9999px; /* Full circle */

  /* 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: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s 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;

  /* Breakpoints */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;
  --breakpoint-2xl: 1536px;
}

/* Reset and Base Styles */
.mobile-account-wrapper * {
  box-sizing: border-box;
}

.mobile-account-wrapper {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--dark);
  background-color: var(--light);
  min-height: 100vh;
}

/* ========================================
   MOBILE-FIRST LAYOUT STRUCTURE
   ======================================== */

/* Container */
.mobile-account-container {
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
  background-color: var(--light);
}

/* Header Section */
.account-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.account-header::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 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
  pointer-events: none;
}

.user-profile-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.avatar-container {
  position: relative;
  flex-shrink: 0;
}

.user-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--border-radius-full);
  border: 3px solid rgba(255, 255, 255, 0.3);
  background-color: var(--white);
  object-fit: cover;
}

.avatar-edit-btn {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 28px;
  height: 28px;
  border-radius: var(--border-radius-full);
  background-color: var(--white);
  color: var(--primary);
  border: 2px solid var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.avatar-edit-btn:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-lg);
}

.user-info {
  flex: 1;
  min-width: 0;
}

.user-name {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin: 0 0 var(--spacing-xs) 0;
  line-height: 1.3;
}

.user-email {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin: 0 0 var(--spacing-sm) 0;
  word-break: break-word;
}

.user-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--border-radius-full);
  background-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(10px);
}

.badge-premium {
  background-color: rgba(255, 193, 7, 0.3);
  color: #fff3cd;
}

.settings-btn {
  background: none;
  border: none;
  color: var(--white);
  font-size: var(--font-size-xl);
  cursor: pointer;
  padding: var(--spacing-sm);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.settings-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

/* Quick Stats Section */
.quick-stats {
  background-color: var(--white);
  padding: var(--spacing-lg);
  border-bottom: 1px solid #e9ecef;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
  border-radius: var(--border-radius-lg);
  background-color: var(--light);
  transition: all var(--transition-normal);
  cursor: pointer;
}

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

.stat-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--primary);
  margin-bottom: var(--spacing-xs);
}

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

/* Primary Actions Section */
.primary-actions {
  padding: var(--spacing-lg);
  background-color: var(--white);
  border-bottom: 1px solid #e9ecef;
}

.action-btn {
  width: 100%;
  padding: var(--spacing-md) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  min-height: 48px; /* Touch-friendly */
}

.action-btn-primary {
  background-color: var(--primary);
  color: var(--white);
  margin-bottom: var(--spacing-md);
}

.action-btn-primary:hover {
  background-color: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.action-btn-secondary {
  background-color: var(--light);
  color: var(--dark);
  border: 1px solid #dee2e6;
}

.action-btn-secondary:hover {
  background-color: #e9ecef;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.action-btn:active {
  transform: translateY(1px);
}

/* Bottom Navigation */
.account-nav {
  position: sticky;
  bottom: 0;
  background-color: var(--white);
  border-top: 1px solid #e9ecef;
  z-index: var(--z-sticky);
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.nav-tabs {
  display: flex;
  height: 60px;
}

.nav-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xs);
  border: none;
  background: none;
  color: var(--secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
  text-decoration: none;
  font-size: var(--font-size-xs);
  min-height: 48px;
}

.nav-tab i {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xs);
}

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

.nav-tab.active::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background-color: var(--primary);
  border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
}

.nav-tab .badge {
  position: absolute;
  top: var(--spacing-xs);
  right: 20%;
  background-color: var(--danger);
  color: var(--white);
  font-size: 10px;
  padding: 2px 6px;
  border-radius: var(--border-radius-full);
  min-width: 18px;
  text-align: center;
}

/* Content Sections */
.account-content {
  background-color: var(--light);
  min-height: calc(100vh - 400px);
  padding-bottom: 80px; /* Space for bottom nav */
}

.tab-content {
  display: none;
  animation: fadeInUp var(--transition-normal) ease-out;
}

.tab-content.active {
  display: block;
}

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

/* Section Headers */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  background-color: var(--white);
  border-bottom: 1px solid #e9ecef;
}

.section-header h2 {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin: 0;
  color: var(--dark);
}

.view-all-link {
  color: var(--primary);
  text-decoration: none;
  font-size: var(--font-size-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.view-all-link:hover {
  color: var(--primary-dark);
}

/* Order Cards */
.recent-orders {
  background-color: var(--white);
  margin-bottom: var(--spacing-md);
}

.order-list {
  padding: var(--spacing-md);
}

.order-card {
  background-color: var(--white);
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-normal);
  cursor: pointer;
}

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

.order-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.order-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.order-number {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--dark);
}

.order-date {
  font-size: var(--font-size-sm);
  color: var(--secondary);
}

.order-status {
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.status-processing {
  background-color: var(--warning);
  color: #856404;
}

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

.status-pending {
  background-color: var(--info);
  color: white;
}

.order-items {
  margin-bottom: var(--spacing-md);
}

.item-preview {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.item-preview img {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-md);
  object-fit: cover;
}

.item-count {
  font-size: var(--font-size-sm);
  color: var(--secondary);
}

.order-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.order-total {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--dark);
}

.track-btn {
  background-color: var(--primary);
  color: var(--white);
  border: none;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.track-btn:hover {
  background-color: var(--primary-dark);
}

/* Quick Actions Grid */
.quick-actions {
  background-color: var(--white);
  margin-bottom: var(--spacing-md);
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.quick-action {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-lg);
  background-color: var(--light);
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius-lg);
  text-decoration: none;
  color: var(--dark);
  transition: all var(--transition-normal);
  cursor: pointer;
  min-height: 80px;
  justify-content: center;
}

.quick-action:hover {
  background-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.quick-action i {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-sm);
}

.quick-action span {
  font-size: var(--font-size-sm);
  font-weight: 500;
  text-align: center;
}

/* Form Styles */
.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 500;
  color: var(--dark);
  font-size: var(--font-size-sm);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 1px solid #ced4da;
  border-radius: var(--border-radius-md);
  font-size: var(--font-size-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  background-color: var(--white);
}

.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.1);
}

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

/* Address Cards */
.address-card {
  background-color: var(--white);
  border: 1px solid #e9ecef;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  transition: all var(--transition-normal);
}

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

.address-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
}

.address-header h3 {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin: 0;
  color: var(--dark);
}

.address-actions {
  display: flex;
  gap: var(--spacing-xs);
}

.edit-btn, .delete-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--border-radius-md);
  transition: background-color var(--transition-fast);
}

.edit-btn {
  color: var(--primary);
}

.edit-btn:hover {
  background-color: var(--primary-light);
}

.delete-btn {
  color: var(--danger);
}

.delete-btn:hover {
  background-color: rgba(220, 53, 69, 0.1);
}

.address-content p {
  margin: 0 0 var(--spacing-sm) 0;
  line-height: 1.5;
  color: var(--dark);
}

.contact {
  font-size: var(--font-size-sm);
  color: var(--secondary);
}

.address-footer {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid #e9ecef;
}

.radio-label {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: var(--font-size-sm);
}

.radio-label input[type="radio"] {
  margin-right: var(--spacing-xs);
}

/* Loading States */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 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: 1rem;
  margin-bottom: var(--spacing-xs);
}

.skeleton-avatar {
  width: 80px;
  height: 80px;
  border-radius: var(--border-radius-full);
}

.skeleton-card {
  height: 120px;
  margin-bottom: var(--spacing-md);
}

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

.empty-state i {
  font-size: var(--font-size-4xl);
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--font-size-lg);
  margin: 0 0 var(--spacing-sm) 0;
  color: var(--dark);
}

.empty-state p {
  margin: 0;
  font-size: var(--font-size-sm);
}

/* ========================================
   TABLET STYLES (768px+)
   ======================================== */
@media (min-width: 768px) {
  .mobile-account-container {
    max-width: 768px;
    margin: 0 auto;
    box-shadow: var(--shadow-lg);
  }

  .stat-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .primary-actions {
    display: flex;
    gap: var(--spacing-md);
  }

  .action-btn {
    width: auto;
    flex: 1;
  }

  .action-btn-primary {
    margin-bottom: 0;
  }

  .nav-tabs {
    position: static;
    border-top: none;
    border-bottom: 1px solid #e9ecef;
    height: auto;
  }

  .nav-tab {
    flex-direction: row;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
  }

  .nav-tab i {
    margin-bottom: 0;
  }

  .account-content {
    padding-bottom: var(--spacing-lg);
  }

  .action-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ========================================
   DESKTOP STYLES (1024px+)
   ======================================== */
@media (min-width: 1024px) {
  .mobile-account-container {
    max-width: 1200px;
    margin: var(--spacing-lg) auto;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: calc(100vh - 2rem);
  }

  .account-header {
    border-radius: var(--border-radius-lg) 0 0 0;
  }

  .quick-stats,
  .primary-actions,
  .account-nav {
    display: none;
  }

  .sidebar {
    grid-column: 1;
    background-color: var(--white);
    border-right: 1px solid #e9ecef;
    padding: var(--spacing-lg);
  }

  .desktop-nav {
    position: sticky;
    top: var(--spacing-lg);
  }

  .desktop-nav .nav-tab {
    display: flex;
    align-items: center;
    width: 100%;
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    margin-bottom: var(--spacing-xs);
    justify-content: flex-start;
    text-align: left;
  }

  .desktop-nav .nav-tab:hover {
    background-color: var(--light);
  }

  .desktop-nav .nav-tab.active {
    background-color: var(--primary);
    color: var(--white);
  }

  .main-content {
    grid-column: 2;
    background-color: var(--light);
  }

  .account-content {
    padding: 0;
  }

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

/* ========================================
   UTILITY CLASSES
   ======================================== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

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

.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: var(--spacing-xs) !important; }
.mb-2 { margin-bottom: var(--spacing-sm) !important; }
.mb-3 { margin-bottom: var(--spacing-md) !important; }
.mb-4 { margin-bottom: var(--spacing-lg) !important; }

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

/* Focus styles for keyboard navigation */
.nav-tab:focus,
.action-btn:focus,
.form-input:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .account-header {
    background: var(--dark);
  }

  .order-card,
  .address-card {
    border: 2px solid var(--dark);
  }
}