/* ============================================
   ACTIVE LIFE HUB - MODERN DESIGN SYSTEM
   ============================================ */

/* CSS Variables for Theming */
:root {
  /* Modern Gradient Colors */
  --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
  --gradient-success: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
  --gradient-accent: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
  
  /* Solid Colors */
  --color-primary: #667eea;
  --color-primary-dark: #5568d3;
  --color-secondary: #f093fb;
  --color-success: #38ef7d;
  --color-accent: #fa709a;
  
  /* Neutrals */
  --color-bg: #f8f9fa;
  --color-surface: #ffffff;
  --color-text: #1a202c;
  --color-text-muted: #718096;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
  --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.3);
  
  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: 'Outfit', 'Inter', sans-serif;
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ============================================
   GLASSMORPHISM
   ============================================ */

.glass {
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.glass-dark {
  background: rgba(0, 0, 0, 0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.glass-card {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.5);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* ============================================
   GRADIENT UTILITIES
   ============================================ */

.bg-gradient-primary {
  background: var(--gradient-primary);
}

.bg-gradient-secondary {
  background: var(--gradient-secondary);
}

.bg-gradient-success {
  background: var(--gradient-success);
}

.bg-gradient-accent {
  background: var(--gradient-accent);
}

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

/* ============================================
   BUTTONS
   ============================================ */

.btn-modern {
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  font-weight: 600;
  letter-spacing: 0.025em;
}

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

.btn-modern:hover::before {
  width: 300px;
  height: 300px;
}

.btn-gradient {
  background: var(--gradient-primary);
  color: white;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-md);
}

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

/* ============================================
   CARDS
   ============================================ */

.card-modern {
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  overflow: hidden;
}

.card-modern:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.card-gradient-border {
  position: relative;
  background: white;
  border-radius: var(--radius-lg);
  padding: 1px;
}

.card-gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: var(--gradient-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

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

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

.animate-slide-in {
  animation: slideInRight var(--transition-base) ease-out;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* Stagger children animations */
.stagger-children > * {
  animation: fadeIn var(--transition-base) ease-out;
  animation-fill-mode: both;
}

.stagger-children > *:nth-child(1) { animation-delay: 0ms; }
.stagger-children > *:nth-child(2) { animation-delay: 50ms; }
.stagger-children > *:nth-child(3) { animation-delay: 100ms; }
.stagger-children > *:nth-child(4) { animation-delay: 150ms; }
.stagger-children > *:nth-child(5) { animation-delay: 200ms; }

/* ============================================
   LOADING STATES
   ============================================ */

.skeleton {
  background: linear-gradient(
    90deg,
    #f0f0f0 25%,
    #e0e0e0 50%,
    #f0f0f0 75%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite;
  border-radius: var(--radius-md);
}

/* ============================================
   NAVBAR
   ============================================ */

.navbar-modern {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 50;
  transition: all var(--transition-base);
}

.navbar-modern.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

/* ============================================
   FORMS
   ============================================ */

.input-modern {
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  transition: all var(--transition-base);
  font-size: 1rem;
}

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

.input-modern::placeholder {
  color: var(--color-text-muted);
}

/* Floating labels */
.input-group {
  position: relative;
  margin-top: 1.5rem;
}

.input-group input {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: var(--radius-md);
  font-size: 1rem;
  transition: all var(--transition-base);
}

.input-group label {
  position: absolute;
  left: 1rem;
  top: 1rem;
  color: var(--color-text-muted);
  transition: all var(--transition-base);
  pointer-events: none;
  background: white;
  padding: 0 0.25rem;
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
  top: -0.5rem;
  left: 0.75rem;
  font-size: 0.75rem;
  color: var(--color-primary);
}

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

/* ============================================
   UTILITIES
   ============================================ */

.smooth-scroll {
  scroll-behavior: smooth;
}

.no-scrollbar::-webkit-scrollbar {
  display: none;
}

.no-scrollbar {
  -ms-overflow-style: none;
  scrollbar-width: none;
}

/* Hover lift effect */
.hover-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

/* Text shadow for better readability on images */
.text-shadow {
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.text-shadow-strong {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}