/* HabitTracker Pro - Main Styles - Refactored & Optimized */
/* Advanced CSS with Glassmorphism, Animations, and Custom Effects */

/* Performance Optimizations */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-feature-settings: "kern" 1, "liga" 1, "calt" 1;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 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;
    scroll-behavior: auto !important;
  }
}

/* CSS Variables for Theme System */
:root {
  /* Primary Colors */
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  --primary-300: #93c5fd;
  --primary-400: #60a5fa;
  --primary-500: #3b82f6;
  --primary-600: #2563eb;
  --primary-700: #1d4ed8;
  --primary-800: #1e40af;
  --primary-900: #1e3a8a;

  /* Dark Theme Colors */
  --dark-50: #f8fafc;
  --dark-100: #f1f5f9;
  --dark-200: #e2e8f0;
  --dark-300: #cbd5e1;
  --dark-400: #94a3b8;
  --dark-500: #64748b;
  --dark-600: #475569;
  --dark-700: #334155;
  --dark-800: #1e293b;
  --dark-900: #0f172a;

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-backdrop: blur(8px);

  /* Gradient Backgrounds */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
  --gradient-warning: linear-gradient(135deg, #fdbb2d 0%, #22c1c3 100%);
  --gradient-danger: linear-gradient(135deg, #ff9a9e 0%, #fecfef 100%);

  /* Animation Timings */
  --transition-fast: 0.15s ease-out;
  --transition-normal: 0.3s ease-out;
  --transition-slow: 0.5s ease-out;

  /* 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);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.5);
  --shadow-neon: 0 0 5px currentColor, 0 0 10px currentColor, 0 0 15px currentColor;
}

/* Light Theme Variables */
[data-theme="light"] {
  --glass-bg: rgba(255, 255, 255, 0.25);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
}

/* Auto Theme (System Preference) */
@media (prefers-color-scheme: light) {
  [data-theme="auto"] {
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: rgba(0, 0, 0, 0.1);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: rgba(59, 130, 246, 0.5);
  border-radius: 4px;
  transition: background var(--transition-normal);
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(59, 130, 246, 0.7);
}

/* Glassmorphism Classes */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  -webkit-backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-strong {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-subtle {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Animation Keyframes */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes bounceIn {
  0% {
    opacity: 0;
    transform: scale(0.3);
  }
  50% {
    opacity: 1;
    transform: scale(1.05);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
  }
  50% {
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.6);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-10px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(10px);
  }
}

@keyframes wobble {
  0% {
    transform: translateX(0%);
  }
  15% {
    transform: translateX(-25%) rotate(-5deg);
  }
  30% {
    transform: translateX(20%) rotate(3deg);
  }
  45% {
    transform: translateX(-15%) rotate(-3deg);
  }
  60% {
    transform: translateX(10%) rotate(2deg);
  }
  75% {
    transform: translateX(-5%) rotate(-1deg);
  }
  100% {
    transform: translateX(0%);
  }
}

@keyframes heartbeat {
  0% {
    transform: scale(1);
  }
  14% {
    transform: scale(1.1);
  }
  28% {
    transform: scale(1);
  }
  42% {
    transform: scale(1.1);
  }
  70% {
    transform: scale(1);
  }
}

@keyframes rubber {
  0% {
    transform: scale(1);
  }
  30% {
    transform: scale(1.25, 0.75);
  }
  40% {
    transform: scale(0.75, 1.25);
  }
  50% {
    transform: scale(1.15, 0.85);
  }
  65% {
    transform: scale(0.95, 1.05);
  }
  75% {
    transform: scale(1.05, 0.95);
  }
  100% {
    transform: scale(1);
  }
}

/* Animation Classes */
.animate-fade-in {
  animation: fadeIn 0.8s ease-out;
}

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

.animate-fade-in-down {
  animation: fadeInDown 0.6s ease-out;
}

.animate-slide-up {
  animation: slideUp 0.5s ease-out;
}

.animate-slide-down {
  animation: slideDown 0.5s ease-out;
}

.animate-scale-in {
  animation: scaleIn 0.3s ease-out;
}

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

.animate-float {
  animation: float 6s ease-in-out infinite;
}

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

.animate-pulse-slow {
  animation: pulse 3s ease-in-out infinite;
}

.animate-shake {
  animation: shake 0.5s ease-in-out;
}

.animate-wobble {
  animation: wobble 1s ease-in-out;
}

.animate-heartbeat {
  animation: heartbeat 1.5s ease-in-out infinite;
}

.animate-rubber {
  animation: rubber 1s ease-in-out;
}

/* Delayed Animations */
.animate-delay-100 {
  animation-delay: 0.1s;
}

.animate-delay-200 {
  animation-delay: 0.2s;
}

.animate-delay-300 {
  animation-delay: 0.3s;
}

.animate-delay-500 {
  animation-delay: 0.5s;
}

/* Custom Button Styles */
.btn-3d {
  position: relative;
  transform-style: preserve-3d;
  transition: transform var(--transition-normal);
}

.btn-3d:hover {
  transform: translateY(-2px) rotateX(5deg);
}

.btn-3d:active {
  transform: translateY(0) rotateX(0deg);
}

.btn-neon {
  text-shadow: var(--shadow-neon);
  border: 1px solid currentColor;
  box-shadow: inset 0 0 10px currentColor, 0 0 10px currentColor;
}

.btn-gradient {
  background: var(--gradient-primary);
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

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

/* Card Hover Effects */
.card-hover {
  transition: all var(--transition-normal);
  transform-origin: center;
}

.card-hover:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.card-tilt {
  transition: transform var(--transition-normal);
}

.card-tilt:hover {
  transform: perspective(1000px) rotateX(5deg) rotateY(5deg) translateZ(10px);
}

/* Morphing Shapes */
.morph-circle {
  border-radius: 50%;
  transition: border-radius var(--transition-slow);
}

.morph-circle:hover {
  border-radius: 20%;
}

.morph-square {
  border-radius: 0;
  transition: border-radius var(--transition-slow);
}

.morph-square:hover {
  border-radius: 50%;
}

/* Text Effects */
.text-gradient {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.text-glow {
  text-shadow: 0 0 10px currentColor;
}

.text-shadow-lg {
  text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* Loading States */
.loading-skeleton {
  background: linear-gradient(90deg, 
    rgba(255, 255, 255, 0.1) 25%, 
    rgba(255, 255, 255, 0.2) 50%, 
    rgba(255, 255, 255, 0.1) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

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

.loading-dots::after {
  content: '';
  animation: dots 1.5s infinite;
}

@keyframes dots {
  0%, 20% {
    content: '';
  }
  40% {
    content: '.';
  }
  60% {
    content: '..';
  }
  80%, 100% {
    content: '...';
  }
}

/* Progress Bars */
.progress-bar {
  position: relative;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 9999px;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, 
    var(--primary-500), 
    var(--primary-400));
  border-radius: inherit;
  transition: width var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.progress-fill::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(255, 255, 255, 0.3), 
    transparent);
  animation: progressShine 2s infinite;
}

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

/* Custom Scrollbar for specific elements */
.custom-scroll {
  scrollbar-width: thin;
  scrollbar-color: rgba(59, 130, 246, 0.5) transparent;
}

.custom-scroll::-webkit-scrollbar {
  width: 6px;
}

.custom-scroll::-webkit-scrollbar-track {
  background: transparent;
}

.custom-scroll::-webkit-scrollbar-thumb {
  background: rgba(59, 130, 246, 0.5);
  border-radius: 3px;
}

/* Form Enhancements */
.input-glow:focus {
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1), 
              0 0 0 1px var(--primary-500),
              var(--shadow-glow);
}

.input-floating {
  position: relative;
}

.input-floating input:focus + label,
.input-floating input:not(:placeholder-shown) + label {
  transform: translateY(-1.5rem) scale(0.875);
  color: var(--primary-500);
}

.input-floating label {
  position: absolute;
  left: 0.75rem;
  top: 0.75rem;
  pointer-events: none;
  transition: all var(--transition-normal);
  background: var(--dark-900);
  padding: 0 0.25rem;
}

/* Custom Cursor */
.cursor-none {
  cursor: none;
}

#custom-cursor {
  position: fixed;
  top: 0;
  left: 0;
  width: 20px;
  height: 20px;
  background: rgba(59, 130, 246, 0.6);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transition: all 0.1s ease;
  mix-blend-mode: difference;
}

#custom-cursor.hover {
  transform: scale(1.5);
  background: rgba(168, 85, 247, 0.8);
}

/* Notification Styles */
.notification {
  position: fixed;
  top: 1rem;
  right: 1rem;
  z-index: 1000;
  padding: 1rem 1.5rem;
  border-radius: 0.75rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-backdrop);
  border: 1px solid var(--glass-border);
  color: white;
  animation: slideInRight 0.3s ease-out;
}

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

.notification.success {
  border-left: 4px solid #10b981;
}

.notification.error {
  border-left: 4px solid #ef4444;
}

.notification.warning {
  border-left: 4px solid #f59e0b;
}

.notification.info {
  border-left: 4px solid #3b82f6;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  .mobile-optimized {
    font-size: 16px; /* Prevent zoom on iOS */
  }
  
  .touch-friendly {
    min-height: 44px;
    min-width: 44px;
  }
  
  /* Reduce motion for users who prefer it */
  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .glass {
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid white;
  }
  
  .glass-strong {
    background: rgba(0, 0, 0, 0.9);
    border: 2px solid white;
  }
}

/* Print styles */
@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    background: white !important;
    color: black !important;
  }
  
  .glass {
    background: white !important;
    border: 1px solid black !important;
    box-shadow: none !important;
    backdrop-filter: none !important;
  }
}

/* Focus visible for accessibility */
.focus-visible:focus-visible {
  outline: 2px solid var(--primary-500);
  outline-offset: 2px;
}

/* Screen reader only */
.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;
}

/* Custom radio and checkbox styles */
.custom-radio,
.custom-checkbox {
  position: relative;
  cursor: pointer;
}

.custom-radio input,
.custom-checkbox input {
  opacity: 0;
  position: absolute;
}

.custom-radio .checkmark,
.custom-checkbox .checkmark {
  position: absolute;
  top: 0;
  left: 0;
  height: 20px;
  width: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50%;
  transition: all var(--transition-normal);
}

.custom-checkbox .checkmark {
  border-radius: 4px;
}

.custom-radio input:checked ~ .checkmark,
.custom-checkbox input:checked ~ .checkmark {
  background: var(--primary-500);
  border-color: var(--primary-500);
}

.custom-radio .checkmark::after,
.custom-checkbox .checkmark::after {
  content: '';
  position: absolute;
  display: none;
}

.custom-radio input:checked ~ .checkmark::after,
.custom-checkbox input:checked ~ .checkmark::after {
  display: block;
}

.custom-radio .checkmark::after {
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: white;
  transform: translate(-50%, -50%);
}

.custom-checkbox .checkmark::after {
  left: 7px;
  top: 3px;
  width: 5px;
  height: 10px;
  border: solid white;
  border-width: 0 3px 3px 0;
  transform: rotate(45deg);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.2);
  transition: var(--transition-normal);
  border-radius: 24px;
}

.toggle-slider::before {
  position: absolute;
  content: '';
  height: 20px;
  width: 20px;
  left: 2px;
  bottom: 2px;
  background: white;
  transition: var(--transition-normal);
  border-radius: 50%;
}

.toggle-switch input:checked + .toggle-slider {
  background: var(--primary-500);
}

.toggle-switch input:checked + .toggle-slider::before {
  transform: translateX(20px);
}

/* Utility Classes */
.backdrop-blur-xs {
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
}

.backdrop-blur-sm {
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.backdrop-blur-md {
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.backdrop-blur-lg {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.backdrop-blur-xl {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

/* Safe area insets for devices with notches */
.safe-top {
  padding-top: env(safe-area-inset-top);
}

.safe-bottom {
  padding-bottom: env(safe-area-inset-bottom);
}

.safe-left {
  padding-left: env(safe-area-inset-left);
}

.safe-right {
  padding-right: env(safe-area-inset-right);
}