/* 🚀 SEXY MODERN HEALTH SOCIAL TRACKER - DESIGN SYSTEM */

/* ===== CSS VARIABLES ===== */
:root {
  /* Modern Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  
  /* Solid Colors */
  --primary: #667eea;
  --secondary: #764ba2;
  --success: #4facfe;
  --warning: #fa709a;
  --danger: #ff6b6b;
  --dark: #2c3e50;
  --light: #ecf0f1;
  --white: #ffffff;
  --gray-100: #f8f9fa;
  --gray-200: #e9ecef;
  --gray-300: #dee2e6;
  --gray-400: #ced4da;
  --gray-500: #adb5bd;
  --gray-600: #6c757d;
  --gray-700: #495057;
  --gray-800: #343a40;
  --gray-900: #212529;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* 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: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* 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;
}

/* ===== DARK MODE VARIABLES ===== */
[data-theme="dark"] {
  /* Dark Color Palette */
  --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --warning-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  --danger-gradient: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
  
  /* Dark Theme Colors */
  --bg-primary: #1a1a1a;
  --bg-secondary: #2d2d2d;
  --bg-tertiary: #3a3a3a;
  --text-primary: #ffffff;
  --text-secondary: #b0b0b0;
  --text-muted: #888888;
  --border-color: #404040;
  --card-bg: rgba(45, 45, 45, 0.8);
  --glass-bg: rgba(45, 45, 45, 0.1);
  
  /* Dark Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.3);
}

/* ===== GLOBAL STYLES ===== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--gray-800);
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

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; }

.text-gradient {
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== NAVIGATION ===== */
.navbar {
  background: rgba(255, 255, 255, 0.95) !important;
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
}

.navbar-brand {
  font-weight: var(--font-weight-bold);
  font-size: 1.5rem;
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--gray-700) !important;
  transition: var(--transition-fast);
  position: relative;
  padding: var(--spacing-sm) var(--spacing-md) !important;
  border-radius: var(--radius-md);
}

.nav-link:hover {
  color: var(--primary) !important;
  background: rgba(102, 126, 234, 0.1);
  transform: translateY(-1px);
}

.nav-link.active {
  background: var(--primary-gradient);
  color: var(--white) !important;
  box-shadow: var(--shadow-md);
}

/* ===== HAMBURGER MENU STYLING ===== */
.navbar-toggler {
  border: none;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  background: transparent;
}

.navbar-toggler:focus {
  box-shadow: none;
  outline: none;
}

.navbar-toggler-icon {
  background-image: none !important;
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--primary-gradient) !important;
  border-radius: 1px;
  transition: var(--transition-normal);
}

.navbar-toggler-icon::before,
.navbar-toggler-icon::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 2px;
  background: var(--primary-gradient) !important;
  border-radius: 1px;
  transition: var(--transition-normal);
}

.navbar-toggler-icon::before {
  top: -6px;
}

.navbar-toggler-icon::after {
  bottom: -6px;
}

/* Dark mode hamburger menu */
[data-theme="dark"] .navbar-toggler-icon,
[data-theme="dark"] .navbar-toggler-icon::before,
[data-theme="dark"] .navbar-toggler-icon::after {
  background: var(--primary-gradient) !important;
}

/* ===== CARDS ===== */
.card {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  transition: var(--transition-normal);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.card-header {
  background: var(--primary-gradient);
  color: var(--white);
  border: none;
  padding: var(--spacing-lg);
  font-weight: var(--font-weight-semibold);
}

.card-header h3,
.card-header h4,
.card-header h5,
.card-header h6 {
  color: var(--white) !important;
  margin: 0;
}

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

/* ===== BUTTONS ===== */
.btn {
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  padding: var(--spacing-sm) var(--spacing-lg);
  transition: var(--transition-normal);
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::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: var(--transition-slow);
}

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

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

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

.btn-secondary {
  background: var(--secondary-gradient);
  color: var(--white);
}

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

.btn-warning {
  background: var(--warning-gradient);
  color: var(--white);
}

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

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

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

/* ===== FORMS ===== */
.form-control {
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200);
  padding: var(--spacing-md);
  font-size: 1rem;
  transition: var(--transition-normal);
  background: rgba(255, 255, 255, 0.8);
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
  background: var(--white);
}

.form-label {
  font-weight: var(--font-weight-medium);
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

/* ===== STATS CARDS ===== */
.stats-card {
  background: var(--white);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  text-align: center;
  transition: var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stats-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--primary-gradient);
}

.stats-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.stats-number {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stats-label {
  color: var(--gray-600);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ===== PROGRESS BARS ===== */
.progress {
  height: 12px;
  border-radius: var(--radius-lg);
  background: var(--gray-200);
  overflow: hidden;
}

.progress-bar {
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  transition: var(--transition-slow);
}

/* ===== BADGES ===== */
.badge {
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xs) var(--spacing-sm);
}

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

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

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

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

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

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

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

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

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

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

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
  .card-body {
    padding: var(--spacing-lg);
  }
  
  .stats-number {
    font-size: 2rem;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }
  h3 { font-size: 1.5rem; }
}

/* ===== TABLET RESPONSIVE FIXES ===== */
@media (min-width: 769px) and (max-width: 1024px) {
  /* iPad Air and similar tablet devices */
  .navbar {
    padding: 0.5rem 1rem;
  }
  
  .navbar-brand {
    font-size: 1.3rem;
  }
  
  .nav-link {
    padding: 0.5rem 0.75rem !important;
    font-size: 0.95rem;
  }
  
  .navbar-nav {
    gap: 0.25rem;
  }
  
  /* Ensure navigation is always visible on tablets */
  .navbar-collapse {
    display: flex !important;
    flex-basis: auto;
  }
  
  .navbar-toggler {
    display: none !important;
  }
  
  /* Force navbar to stay expanded on tablets */
  .navbar-collapse.collapse {
    display: flex !important;
  }
  
  .navbar-collapse.collapsing {
    display: flex !important;
  }
  
  /* Adjust container for tablet layout */
  .navbar .container {
    max-width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }
  
  /* Ensure dropdowns work properly on tablets */
  .dropdown-menu {
    position: absolute !important;
    transform: none !important;
  }
}

/* ===== LARGE TABLET & SMALL DESKTOP ===== */
@media (min-width: 1025px) and (max-width: 1366px) {
  .navbar {
    padding: 0.75rem 1.5rem;
  }
  
  .nav-link {
    padding: 0.75rem 1rem !important;
  }
}

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

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

.mb-0 { margin-bottom: 0; }
.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); }

.mt-0 { margin-top: 0; }
.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); }

.p-0 { padding: 0; }
.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); }

/* ===== CUSTOM SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--secondary-gradient);
} 

/* ===== ENHANCED ANIMATIONS ===== */

/* Progress Bar Animations */
.progress {
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.progress-bar {
  background: var(--primary-gradient);
  border-radius: var(--radius-lg);
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.progress-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  animation: shimmer 2s infinite;
}

/* Animated Progress Bar Fill */
.progress-bar.animate-fill {
  animation: progressFill 1.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes progressFill {
  from { width: 0%; }
  to { width: var(--target-width); }
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Macro Chart Animations */
.macro-chart {
  position: relative;
  transition: all var(--transition-normal);
}

.macro-chart:hover {
  transform: scale(1.02);
}

.macro-bar {
  background: var(--primary-gradient);
  border-radius: var(--radius-md);
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.macro-bar::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.2) 50%, transparent 70%);
  animation: macroShimmer 3s infinite;
}

@keyframes macroShimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Enhanced Stats Card Animations */
.stats-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  text-align: center;
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.stats-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

.stats-card:hover::before {
  left: 100%;
}

.stats-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: rgba(255, 255, 255, 0.3);
}

.stats-number {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
  background: var(--primary-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-normal);
}

.stats-card:hover .stats-number {
  transform: scale(1.1);
}

/* BMI Chart Animations */
.bmi-chart {
  position: relative;
  transition: all var(--transition-normal);
}

.bmi-chart:hover {
  transform: scale(1.05);
}

.bmi-display {
  animation: fadeInScale 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.8);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Activity Icon Animations */
.activity-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--success-gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: all var(--transition-normal);
}

.activity-icon:hover {
  transform: rotate(360deg) scale(1.1);
  box-shadow: var(--shadow-lg);
}

/* Post Preview Animations */
.post-preview {
  transition: all var(--transition-normal);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.post-preview:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateX(5px);
  border-radius: var(--radius-lg);
}

/* Button Hover Animations */
.btn {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-normal);
  border-radius: var(--radius-md);
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn:hover::after {
  width: 300px;
  height: 300px;
}

/* Card Hover Effects */
.card {
  transition: all var(--transition-normal);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

/* Loading Animation for Charts */
.chart-loading {
  position: relative;
  overflow: hidden;
}

.chart-loading::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: loadingShimmer 1.5s infinite;
}

@keyframes loadingShimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* Smooth Page Transitions */
.page-transition {
  animation: pageFadeIn 0.5s ease-out;
}

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

/* Enhanced Badge Animations */
.badge {
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.badge:hover {
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transition: left 0.5s ease;
}

.badge:hover::before {
  left: 100%;
}

/* Form Input Animations */
.form-control {
  transition: all var(--transition-normal);
  border-radius: var(--radius-md);
}

.form-control:focus {
  transform: scale(1.02);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

/* Modal Animations */
.modal.fade .modal-dialog {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: scale(0.8);
}

.modal.show .modal-dialog {
  transform: scale(1);
}

/* Table Row Animations */
.table tbody tr {
  transition: all var(--transition-normal);
}

.table tbody tr:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.01);
}

/* Notification Badge Pulse */
.notification-badge {
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); }
}

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

@media (max-width: 768px) {
  .stats-card:hover {
    transform: none;
  }
  
  .post-preview:hover {
    transform: none;
  }
  
  .activity-icon:hover {
    transform: none;
  }
} 

/* Dark Mode Toggle Styles */
.theme-toggle {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.theme-toggle::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: -1;
}

[data-theme="dark"] .theme-toggle::before {
    opacity: 1;
}

.theme-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.2);
}

.theme-icon {
    font-size: 1.2rem;
    color: white;
    transition: all 0.3s ease;
}

[data-theme="dark"] .theme-icon.sun {
    opacity: 0;
    transform: rotate(90deg);
}

[data-theme="dark"] .theme-icon.moon {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon.sun {
    opacity: 1;
    transform: rotate(0deg);
}

.theme-icon.moon {
    opacity: 0;
    transform: rotate(-90deg);
}

/* Dark Mode Transitions */
* {
  transition: background-color var(--transition-normal), 
              color var(--transition-normal), 
              border-color var(--transition-normal);
}

/* Enhanced Dark Mode Styles */
[data-theme="dark"] {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .container,
[data-theme="dark"] .container-fluid,
[data-theme="dark"] main {
    background: transparent !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .card {
    background: var(--card-bg);
    border-color: var(--border-color);
    backdrop-filter: blur(20px);
}

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 26, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .nav-link {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .nav-link:hover,
[data-theme="dark"] .nav-link.active {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .navbar-brand {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .navbar-brand span {
    color: var(--text-primary) !important;
    -webkit-text-fill-color: var(--text-primary) !important;
}

[data-theme="dark"] .dropdown-toggle::after {
    color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle {
    color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle .theme-icon {
    color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle .theme-icon.sun {
    color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle .theme-icon.moon {
    color: var(--text-secondary);
}

[data-theme="dark"] .form-control {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

[data-theme="dark"] .form-control:focus {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--text-primary);
}

[data-theme="dark"] .table {
    color: var(--text-primary);
}

[data-theme="dark"] .table tbody tr:hover {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .modal-content {
    background: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-color);
}

[data-theme="dark"] .dropdown-menu {
    background: var(--card-bg);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-secondary);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .stats-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
}

[data-theme="dark"] .stats-card:hover {
    background: rgba(45, 45, 45, 0.9);
    transform: translateY(-5px);
}

[data-theme="dark"] .progress {
    background-color: var(--bg-tertiary);
}

[data-theme="dark"] .badge {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

[data-theme="dark"] .text-muted {
    color: var(--text-muted) !important;
}

[data-theme="dark"] .text-secondary {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] body {
    color: var(--text-primary);
}

[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] p {
    color: var(--text-secondary);
}

[data-theme="dark"] label {
    color: var(--text-secondary);
}

[data-theme="dark"] .btn {
    color: var(--text-primary);
}

[data-theme="dark"] .alert {
    color: var(--text-primary);
}

[data-theme="dark"] .badge {
    color: var(--text-primary);
}

[data-theme="dark"] .card-title {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .card-text {
    color: var(--text-secondary);
}

/* Health Tips Dark Mode Styling */
[data-theme="dark"] .tip-item {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

[data-theme="dark"] .tip-item:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

[data-theme="dark"] .tip-item p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

[data-theme="dark"] .tip-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .tip-icon i {
    font-size: 1.2rem;
    color: var(--text-primary);
}

[data-theme="dark"] .tip-icon i.text-success {
    color: #4facfe !important;
}

[data-theme="dark"] .tip-icon i.text-primary {
    color: #667eea !important;
}

[data-theme="dark"] .tip-icon i.text-warning {
    color: #fa709a !important;
}

/* Enhanced Health Tips Styling */
.tip-item {
    background: rgba(248, 249, 250, 0.8);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border: 1px solid rgba(0, 0, 0, 0.05);
    transition: all var(--transition-normal);
}

.tip-item:hover {
    background: rgba(248, 249, 250, 1);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.tip-item p {
    color: var(--gray-700);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0;
}

.tip-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-sm);
    box-shadow: var(--shadow-sm);
}

.tip-icon i {
    font-size: 1.2rem;
}

.tip-icon i.text-success {
    color: #28a745 !important;
}

.tip-icon i.text-primary {
    color: #007bff !important;
}

.tip-icon i.text-warning {
    color: #ffc107 !important;
} 

/* ===== THEME TOGGLE STYLING ===== */
.theme-toggle {
  cursor: pointer;
  padding: 0.5rem;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.theme-toggle:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

.theme-toggle .theme-icon {
  font-size: 1.1rem;
  color: var(--gray-700);
  transition: var(--transition-normal);
}

.theme-toggle .theme-icon.sun {
  display: block;
}

.theme-toggle .theme-icon.moon {
  display: none;
}

.theme-toggle.active .theme-icon.sun {
  display: none;
}

.theme-toggle.active .theme-icon.moon {
  display: block;
  color: var(--gray-300);
}

/* Dark mode theme toggle */
[data-theme="dark"] .theme-toggle {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .theme-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .theme-toggle .theme-icon {
  color: var(--text-secondary);
}

[data-theme="dark"] .theme-toggle.active .theme-icon.moon {
  color: var(--text-primary);
}

/* ===== COMPREHENSIVE DARK MODE FIXES ===== */

/* Force dark mode consistency across all pages */
[data-theme="dark"] .page-transition {
    background: transparent !important;
}

[data-theme="dark"] .dashboard-container,
[data-theme="dark"] .meals-container,
[data-theme="dark"] .activities-container,
[data-theme="dark"] .feed-container,
[data-theme="dark"] .profile-container {
    background: transparent !important;
}

/* Dark mode for all text elements */
[data-theme="dark"] h1,
[data-theme="dark"] h2,
[data-theme="dark"] h3,
[data-theme="dark"] h4,
[data-theme="dark"] h5,
[data-theme="dark"] h6 {
    color: var(--text-primary) !important;
}

[data-theme="dark"] p,
[data-theme="dark"] span,
[data-theme="dark"] div {
    color: var(--text-secondary) !important;
}

/* Dark mode for meal cards */
[data-theme="dark"] .meal-card,
[data-theme="dark"] .activity-card,
[data-theme="dark"] .post-card {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

/* Dark mode for stats cards */
[data-theme="dark"] .stats-card {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .stats-card .stats-number {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .stats-card .stats-label {
    color: var(--text-secondary) !important;
}

/* Dark mode for buttons */
[data-theme="dark"] .btn {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .btn-outline-primary {
    border-color: var(--primary) !important;
    color: var(--primary) !important;
}

[data-theme="dark"] .btn-outline-primary:hover {
    background-color: var(--primary) !important;
    color: var(--white) !important;
}

/* Dark mode for navigation sidebar */
[data-theme="dark"] .sidebar,
[data-theme="dark"] .nav-sidebar {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .nav-sidebar .nav-link {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .nav-sidebar .nav-link:hover,
[data-theme="dark"] .nav-sidebar .nav-link.active {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* Dark mode for feed posts */
[data-theme="dark"] .post-item,
[data-theme="dark"] .feed-post {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .post-header {
    color: var(--text-primary) !important;
}

[data-theme="dark"] .post-content {
    color: var(--text-secondary) !important;
}

/* Dark mode for profile elements */
[data-theme="dark"] .profile-card,
[data-theme="dark"] .user-info {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

/* Dark mode for form elements */
[data-theme="dark"] .form-control {
    background: var(--bg-secondary) !important;
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .form-control:focus {
    background: var(--bg-tertiary) !important;
    border-color: var(--primary) !important;
    color: var(--text-primary) !important;
}

/* Dark mode for badges and labels */
[data-theme="dark"] .badge {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* Dark mode for tables */
[data-theme="dark"] .table {
    background: var(--card-bg) !important;
    color: var(--text-primary) !important;
}

[data-theme="dark"] .table th,
[data-theme="dark"] .table td {
    border-color: var(--border-color) !important;
    color: var(--text-primary) !important;
}

/* Dark mode for dropdowns */
[data-theme="dark"] .dropdown-menu {
    background: var(--card-bg) !important;
    border-color: var(--border-color) !important;
}

[data-theme="dark"] .dropdown-item {
    color: var(--text-secondary) !important;
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--bg-tertiary) !important;
    color: var(--text-primary) !important;
}

/* ===== ENHANCED BANNER STYLES ===== */

/* Modern Toast-Style Banners */
.modern-banner {
  position: fixed;
  top: 90px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  max-width: 90vw;
  width: 500px;
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: var(--shadow-xl);
  animation: slideDownFade 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

@keyframes slideDownFade {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

@keyframes slideUpFade {
  from {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  to {
    opacity: 0;
    transform: translateX(-50%) translateY(-20px);
  }
}

/* Banner Content Layout */
.banner-content {
  display: flex;
  align-items: flex-start;
  padding: var(--spacing-lg);
  gap: var(--spacing-md);
}

.banner-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: white;
  flex-shrink: 0;
  box-shadow: var(--shadow-md);
}

.banner-text {
  flex: 1;
  min-width: 0;
}

.banner-title {
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  margin-bottom: var(--spacing-xs);
  line-height: 1.3;
}

.banner-message {
  font-size: 0.875rem;
  opacity: 0.9;
  line-height: 1.4;
  margin: 0;
}

.banner-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: inherit;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-normal);
  flex-shrink: 0;
  font-size: 1rem;
}

.banner-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

/* Success Banner */
.banner-success {
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.95) 0%, rgba(0, 242, 254, 0.95) 100%);
  color: white;
}

.banner-success .banner-icon {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.banner-success .banner-close {
  color: white;
}

/* Error Banner */
.banner-error {
  background: linear-gradient(135deg, rgba(255, 154, 158, 0.95) 0%, rgba(254, 207, 239, 0.95) 100%);
  color: white;
}

.banner-error .banner-icon {
  background: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);
}

.banner-error .banner-close {
  color: white;
}

/* Warning Banner */
.banner-warning {
  background: linear-gradient(135deg, rgba(250, 112, 154, 0.95) 0%, rgba(254, 225, 64, 0.95) 100%);
  color: white;
}

.banner-warning .banner-icon {
  background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

.banner-warning .banner-close {
  color: white;
}

/* Info Banner */
.banner-info {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.95) 0%, rgba(118, 75, 162, 0.95) 100%);
  color: white;
}

.banner-info .banner-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.banner-info .banner-close {
  color: white;
}

/* Auto-dismiss Progress Bar */
.banner-progress {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 3px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  overflow: hidden;
}

.banner-progress-bar {
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  animation: progressShrink 5s linear forwards;
}

@keyframes progressShrink {
  from { width: 100%; }
  to { width: 0%; }
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .modern-banner {
    top: 80px;
    left: var(--spacing-md);
    right: var(--spacing-md);
    transform: none;
    max-width: none;
    width: auto;
  }
  
  .banner-content {
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
  }
  
  .banner-icon {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .banner-close {
    width: 28px;
    height: 28px;
    font-size: 0.875rem;
  }
  
  .banner-title {
    font-size: 0.9rem;
  }
  
  .banner-message {
    font-size: 0.8rem;
  }
}

/* Dark Mode Banner Styles */
[data-theme="dark"] .banner-success {
  background: linear-gradient(135deg, rgba(79, 172, 254, 0.9) 0%, rgba(0, 242, 254, 0.9) 100%);
  border-color: rgba(79, 172, 254, 0.3);
}

[data-theme="dark"] .banner-error {
  background: linear-gradient(135deg, rgba(255, 154, 158, 0.9) 0%, rgba(254, 207, 239, 0.9) 100%);
  border-color: rgba(255, 154, 158, 0.3);
}

[data-theme="dark"] .banner-warning {
  background: linear-gradient(135deg, rgba(250, 112, 154, 0.9) 0%, rgba(254, 225, 64, 0.9) 100%);
  border-color: rgba(250, 112, 154, 0.3);
}

[data-theme="dark"] .banner-info {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
  border-color: rgba(102, 126, 234, 0.3);
}

/* Enhanced Weight Reminder Banner */
.weight-reminder-banner {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.95) 0%, rgba(118, 75, 162, 0.95) 100%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-xl);
  margin: var(--spacing-md);
  overflow: hidden;
  position: relative;
}

.weight-reminder-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #4facfe, #00f2fe, #fa709a, #fee140);
  background-size: 300% 100%;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.weight-reminder-content {
  padding: var(--spacing-lg);
  color: white;
}

.weight-reminder-header {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.weight-reminder-icon {
  width: 56px;
  height: 56px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.weight-reminder-title {
  flex: 1;
}

.weight-reminder-title h6 {
  font-weight: var(--font-weight-semibold);
  margin: 0;
  color: white;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.weight-reminder-countdown {
  font-size: 0.8rem;
  opacity: 0.8;
  margin-left: var(--spacing-sm);
}

.weight-reminder-actions {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.weight-reminder-btn {
  background: rgba(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  transition: var(--transition-normal);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.weight-reminder-btn:hover {
  background: rgba(255, 255, 255, 0.3);
  color: white;
  transform: translateY(-1px);
}

.weight-reminder-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  border-radius: 50%;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition-normal);
}

.weight-reminder-close:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.1);
}

/* Mobile Weight Reminder */
@media (max-width: 768px) {
  .weight-reminder-banner {
    margin: var(--spacing-sm);
    border-radius: var(--radius-lg);
  }
  
  .weight-reminder-content {
    padding: var(--spacing-md);
  }
  
  .weight-reminder-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
  }
  
  .weight-reminder-icon {
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
  }
  
  .weight-reminder-actions {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
  
  .weight-reminder-btn {
    justify-content: center;
    padding: var(--spacing-md);
  }
  
  .weight-reminder-close {
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 28px;
    height: 28px;
  }
}

/* Dark Mode Weight Reminder */
[data-theme="dark"] .weight-reminder-banner {
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.9) 0%, rgba(118, 75, 162, 0.9) 100%);
  border-color: rgba(102, 126, 234, 0.3);
}