/* ===================================
   FitNest Design System & Global Styles
   =================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* --- Design Tokens --- */
:root {
  /* Primary Colors */
  --color-primary: #6C63FF;
  --color-primary-light: #8B83FF;
  --color-primary-dark: #5A52E0;
  --color-primary-glow: rgba(108, 99, 255, 0.3);
  
  /* Accent Colors */
  --color-coral: #FF6584;
  --color-coral-light: #FF8DA0;
  --color-coral-dark: #E04E6A;
  --color-mint: #00C9A7;
  --color-mint-light: #33D4B8;
  --color-gold: #FFD700;
  --color-gold-glow: rgba(255, 215, 0, 0.3);
  
  /* Dark Theme (Default) */
  --bg-primary: #1A1A2E;
  --bg-secondary: #16213E;
  --bg-card: #1E2745;
  --bg-card-hover: #243052;
  --bg-glass: rgba(30, 39, 69, 0.7);
  
  /* Text */
  --text-primary: #FFFFFF;
  --text-secondary: #A0AEC0;
  --text-muted: #718096;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6C63FF 0%, #FF6584 100%);
  --gradient-purple: linear-gradient(135deg, #6C63FF 0%, #8B83FF 100%);
  --gradient-coral: linear-gradient(135deg, #FF6584 0%, #FF8DA0 100%);
  --gradient-mint: linear-gradient(135deg, #00C9A7 0%, #33D4B8 100%);
  --gradient-dark: linear-gradient(180deg, #1A1A2E 0%, #16213E 100%);
  --gradient-card: linear-gradient(145deg, rgba(30,39,69,0.8) 0%, rgba(22,33,62,0.6) 100%);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow-purple: 0 4px 24px rgba(108, 99, 255, 0.4);
  --shadow-glow-coral: 0 4px 24px rgba(255, 101, 132, 0.3);
  --shadow-glow-mint: 0 4px 24px rgba(0, 201, 167, 0.3);
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-xs: 0.75rem;
  --font-sm: 0.875rem;
  --font-base: 1rem;
  --font-lg: 1.125rem;
  --font-xl: 1.25rem;
  --font-2xl: 1.5rem;
  --font-3xl: 2rem;
  --font-4xl: 2.5rem;
  --font-5xl: 3rem;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Z-Index */
  --z-nav: 100;
  --z-modal: 200;
  --z-toast: 300;
}

body.theme-light {
  --bg-primary: #F0F2F5;
  --bg-secondary: #FFFFFF;
  --bg-card: #FFFFFF;
  --bg-card-hover: #F8F9FA;
  --bg-glass: rgba(255, 255, 255, 0.7);
  --text-primary: #1A1A2E;
  --text-secondary: #4A5568;
  --text-muted: #718096;
  --gradient-dark: linear-gradient(180deg, #F0F2F5 0%, #FFFFFF 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.8) 0%, rgba(248,249,250,0.6) 100%);
  --shadow-glow-purple: 0 4px 24px rgba(108, 99, 255, 0.2);
}

/* --- Reset & Base --- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background: var(--gradient-dark);
  color: var(--text-primary);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
}

button {
  border: none;
  outline: none;
  cursor: pointer;
  font-family: var(--font-family);
}

img {
  max-width: 100%;
  display: block;
}

/* --- Utility Classes --- */
.container {
  max-width: 480px;
  margin: 0 auto;
  padding: 0 var(--space-md);
  width: 100%;
}

.glass-card {
  background: var(--bg-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: var(--font-base);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--transition-fast);
}

.btn:hover::after {
  background: rgba(255,255,255,0.1);
}

.btn:active {
  transform: scale(0.97);
}

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

.btn-primary:hover {
  box-shadow: 0 6px 30px rgba(108, 99, 255, 0.5);
}

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

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

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

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

.btn-lg {
  padding: var(--space-lg) var(--space-2xl);
  font-size: var(--font-lg);
}

.btn-block {
  width: 100%;
}

/* --- Progress Bar --- */
.progress-bar {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.1);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
  position: relative;
}

.progress-bar__fill--purple {
  background: var(--gradient-purple);
}

.progress-bar__fill--coral {
  background: var(--gradient-coral);
}

.progress-bar__fill--mint {
  background: var(--gradient-mint);
}

.progress-bar__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: shimmer 2s infinite;
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-full);
  font-size: var(--font-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-purple { background: rgba(108,99,255,0.2); color: var(--color-primary-light); }
.badge-coral { background: rgba(255,101,132,0.2); color: var(--color-coral-light); }
.badge-mint { background: rgba(0,201,167,0.2); color: var(--color-mint-light); }
.badge-gold { background: rgba(255,215,0,0.2); color: var(--color-gold); }

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

@keyframes slideUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

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

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

@keyframes glow {
  0%, 100% { box-shadow: 0 0 20px rgba(108, 99, 255, 0.3); }
  50% { box-shadow: 0 0 40px rgba(108, 99, 255, 0.6); }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

@keyframes catWiggle {
  0%, 100% { transform: rotate(0deg); }
  25% { transform: rotate(-5deg); }
  75% { transform: rotate(5deg); }
}

@keyframes sparkle {
  0%, 100% { opacity: 0; transform: scale(0) rotate(0deg); }
  50% { opacity: 1; transform: scale(1) rotate(180deg); }
}

@keyframes confetti-fall {
  0% { transform: translateY(-100vh) rotate(0deg); opacity: 1; }
  100% { transform: translateY(100vh) rotate(720deg); opacity: 0; }
}

.animate-fadeIn { animation: fadeIn 0.6s ease-out forwards; }
.animate-slideUp { animation: slideUp 0.6s ease-out forwards; }
.animate-scaleIn { animation: scaleIn 0.5s ease-out forwards; }
.animate-float { animation: float 3s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-bounce { animation: bounce 2s ease-in-out infinite; }

/* Staggered animations */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }

/* --- Bottom Navigation --- */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 480px;
  background: rgba(26, 26, 46, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-sm) 0;
  padding-bottom: calc(var(--space-sm) + env(safe-area-inset-bottom, 0));
  z-index: var(--z-nav);
  display: flex;
  justify-content: space-around;
  align-items: center;
}

.bottom-nav__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--space-xs) var(--space-md);
  background: none;
  color: var(--text-muted);
  font-size: var(--font-xs);
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.bottom-nav__item.active {
  color: var(--color-primary);
}

.bottom-nav__item.active::before {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

.bottom-nav__icon {
  font-size: 1.4rem;
}

/* --- Responsive --- */
@media (min-width: 768px) {
  .container {
    max-width: 720px;
  }
}

@media (min-width: 1024px) {
  .container {
    max-width: 960px;
  }
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-primary-dark);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary);
}