/**
 * Liquid Glass Effects for SFTi-Pennies Trading Journal
 * iOS 26-inspired design system with enhanced glassmorphism
 * More clear and flexible than iOS 26 Developer Beta 3
 */

/* ===== Core Glass Variables ===== */
:root {
  /* Enhanced glass properties - More transparent and clear */
  --glass-blur-light: 20px;
  --glass-blur-medium: 45px;
  --glass-blur-heavy: 70px;
  --glass-opacity-light: 0.5;
  --glass-opacity-medium: 0.65;
  --glass-opacity-heavy: 0.8;
  
  /* Enhanced borders and highlights for better depth */
  --glass-border-subtle: rgba(255, 255, 255, 0.12);
  --glass-border-medium: rgba(255, 255, 255, 0.22);
  --glass-border-bright: rgba(0, 255, 136, 0.4);
  --glass-border-glow: rgba(0, 255, 136, 0.6);
  
  /* Multi-layer shadows for depth perception */
  --glass-shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.15), 0 2px 8px rgba(0, 0, 0, 0.08);
  --glass-shadow-md: 0 8px 32px rgba(0, 0, 0, 0.18), 0 4px 16px rgba(0, 0, 0, 0.12);
  --glass-shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.22), 0 8px 32px rgba(0, 0, 0, 0.16);
  --glass-shadow-xl: 0 24px 96px rgba(0, 0, 0, 0.28), 0 12px 48px rgba(0, 0, 0, 0.20);
  
  /* Corner radius - Ultra-smooth iOS 26 style */
  --glass-radius-sm: 18px;
  --glass-radius-md: 28px;
  --glass-radius-lg: 36px;
  --glass-radius-xl: 44px;
  
  /* Accent colors with transparency */
  --glass-accent-green: rgba(0, 255, 136, 0.85);
  --glass-accent-cyan: rgba(6, 182, 212, 0.85);
  --glass-accent-purple: rgba(168, 85, 247, 0.85);
  --glass-accent-amber: rgba(245, 158, 11, 0.85);
  
  /* Background tints - More transparent for better glass effect */
  --glass-bg-dark: rgba(10, 14, 39, 0.55);
  --glass-bg-darker: rgba(15, 20, 41, 0.75);
  --glass-bg-darkest: rgba(10, 14, 39, 0.85);
}

/* ===== Base Glass Card ===== */
.glass-card {
  background: var(--glass-bg-dark);
  backdrop-filter: blur(var(--glass-blur-medium)) saturate(190%);
  -webkit-backdrop-filter: blur(var(--glass-blur-medium)) saturate(190%);
  border: 1px solid var(--glass-border-medium);
  border-radius: var(--glass-radius-md);
  box-shadow: var(--glass-shadow-md);
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
  will-change: transform;
}

/* Top highlight for glass reflection */
.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.4) 50%, 
    transparent 100%);
  opacity: 0.7;
}

/* Subtle gradient overlay for depth */
.glass-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg,
    rgba(255, 255, 255, 0.05) 0%,
    transparent 50%,
    rgba(0, 0, 0, 0.05) 100%);
  pointer-events: none;
  opacity: 0.6;
}

.glass-card:hover {
  transform: translateY(-4px) translateZ(0);
  box-shadow: var(--glass-shadow-lg);
  border-color: var(--glass-border-bright);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Glass Navigation ===== */
.glass-nav {
  background: var(--glass-bg-darkest);
  backdrop-filter: blur(var(--glass-blur-heavy)) saturate(200%);
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy)) saturate(200%);
  border-bottom: 1px solid var(--glass-border-subtle);
  box-shadow: var(--glass-shadow-sm);
}

/* ===== Glass Dropdown Menus (Trades & Mentors) ===== */
.glass-submenu {
  background: linear-gradient(135deg,
    rgba(15, 20, 41, 0.65) 0%,
    rgba(10, 14, 39, 0.75) 100%);
  backdrop-filter: blur(var(--glass-blur-medium)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur-medium)) saturate(180%);
  border: 1px solid var(--glass-border-medium);
  border-radius: var(--glass-radius-md);
  box-shadow: var(--glass-shadow-lg);
  position: relative;
  overflow: hidden;
}

/* Top glass reflection for dropdowns */
.glass-submenu::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.35) 50%, 
    transparent 100%);
  opacity: 0.8;
}

/* Hover state for submenu items */
.glass-submenu .nav-link:hover {
  background: linear-gradient(135deg,
    rgba(0, 255, 136, 0.12) 0%,
    rgba(0, 255, 136, 0.08) 100%);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-left: 2px solid var(--glass-accent-green);
}

/* ===== Glass Buttons ===== */
.glass-btn {
  position: relative;
  background: linear-gradient(135deg, 
    var(--glass-accent-green) 0%, 
    rgba(0, 200, 108, 0.92) 100%);
  backdrop-filter: blur(var(--glass-blur-light));
  -webkit-backdrop-filter: blur(var(--glass-blur-light));
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--glass-radius-sm);
  padding: 0.75rem 1.5rem;
  box-shadow: 
    0 4px 16px rgba(0, 255, 136, 0.35),
    0 8px 28px rgba(0, 0, 0, 0.22),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}

/* Glass shimmer effect on buttons */
.glass-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.3) 50%, 
    transparent 100%);
  transition: left 0.6s ease;
}

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

.glass-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 
    0 8px 24px rgba(0, 255, 136, 0.45),
    0 12px 36px rgba(0, 0, 0, 0.28),
    inset 0 1px 0 rgba(255, 255, 255, 0.45);
}

.glass-btn:active {
  transform: translateY(0px) scale(0.98);
  box-shadow: 
    0 4px 12px rgba(0, 255, 136, 0.3),
    0 6px 18px rgba(0, 0, 0, 0.18),
    inset 0 1px 0 rgba(255, 255, 255, 0.3);
}

/* ===== Glass Chart Container ===== */
.glass-chart {
  background: linear-gradient(135deg,
    rgba(15, 20, 41, 0.5) 0%,
    rgba(10, 14, 39, 0.7) 100%);
  backdrop-filter: blur(var(--glass-blur-medium)) brightness(1.12);
  -webkit-backdrop-filter: blur(var(--glass-blur-medium)) brightness(1.12);
  border: 1px solid var(--glass-border-bright);
  border-radius: var(--glass-radius-xl);
  padding: 2rem;
  box-shadow: 
    var(--glass-shadow-lg),
    inset 0 1px 0 rgba(255, 255, 255, 0.12);
  position: relative;
  overflow: hidden;
}

/* Glow effect for chart containers */
.glass-chart::before {
  content: '';
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  bottom: -2px;
  background: linear-gradient(135deg,
    rgba(0, 255, 136, 0.15) 0%,
    transparent 50%,
    rgba(6, 182, 212, 0.15) 100%);
  border-radius: inherit;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.4s ease;
}

.glass-chart:hover::before {
  opacity: 1;
}

/* ===== Glass Stats Cards ===== */
.glass-stat {
  background: linear-gradient(135deg,
    rgba(15, 20, 41, 0.6) 0%,
    rgba(10, 14, 39, 0.8) 100%);
  backdrop-filter: blur(var(--glass-blur-medium));
  -webkit-backdrop-filter: blur(var(--glass-blur-medium));
  border: 1px solid var(--glass-border-medium);
  border-radius: var(--glass-radius-md);
  padding: 1.5rem;
  box-shadow: var(--glass-shadow-md);
  position: relative;
  overflow: hidden;
}

/* Top gradient line for stats */
.glass-stat::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, 
    var(--glass-accent-green) 0%, 
    var(--glass-accent-cyan) 100%);
  opacity: 0.7;
}

.glass-stat:hover {
  transform: translateY(-3px) translateZ(0);
  box-shadow: var(--glass-shadow-lg);
  border-color: var(--glass-border-bright);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Glass Modals/Overlays ===== */
.glass-modal-backdrop {
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.glass-modal {
  background: linear-gradient(135deg,
    rgba(15, 20, 41, 0.92) 0%,
    rgba(10, 14, 39, 0.96) 100%);
  backdrop-filter: blur(var(--glass-blur-heavy)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy)) saturate(180%);
  border: 1px solid var(--glass-border-medium);
  border-radius: var(--glass-radius-lg);
  box-shadow: var(--glass-shadow-xl);
}

/* ===== Animation Utilities ===== */
@keyframes glassFloat {
  0%, 100% {
    transform: translateY(0px) translateZ(0);
  }
  50% {
    transform: translateY(-10px) translateZ(0);
  }
}

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

.glass-float {
  animation: glassFloat 4s ease-in-out infinite;
}

.glass-shimmer {
  background-size: 200% 100%;
  animation: glassShimmer 3s ease-in-out infinite;
}

/* ===== Smooth Transitions ===== */
.glass-transition {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-transition-fast {
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-transition-slow {
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Responsive Adjustments ===== */
@media (max-width: 768px) {
  :root {
    /* Reduce blur on mobile for better performance */
    --glass-blur-light: 15px;
    --glass-blur-medium: 35px;
    --glass-blur-heavy: 55px;
  }
  
  .glass-card,
  .glass-stat {
    border-radius: var(--glass-radius-sm);
  }
  
  .glass-chart {
    border-radius: var(--glass-radius-md);
    padding: 1.5rem;
  }
}

/* ===== Browser Compatibility Fallbacks ===== */
@supports not ((backdrop-filter: blur(40px)) or (-webkit-backdrop-filter: blur(40px))) {
  .glass-card,
  .glass-nav,
  .glass-submenu,
  .glass-chart,
  .glass-stat,
  .glass-modal {
    background: rgba(15, 20, 41, 1.0);
  }
  
  .glass-btn {
    background: rgba(0, 255, 136, 0.92);
  }
}

/* ===== Performance Optimizations ===== */
.glass-card,
.glass-nav,
.glass-btn,
.glass-chart,
.glass-stat,
.glass-submenu {
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
  contain: paint;
}

/* ===== Accessibility - Respect user preferences ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .glass-float,
  .glass-shimmer {
    animation: none !important;
  }
}

/* ===== Enhanced Glass Effects for Premium Feel ===== */

/* Liquid glass reflection on top edge */
.glass-reflection-top {
  position: relative;
}

.glass-reflection-top::before {
  content: '';
  position: absolute;
  top: 0;
  left: 5%;
  right: 5%;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255, 255, 255, 0.5) 20%,
    rgba(255, 255, 255, 0.6) 50%,
    rgba(255, 255, 255, 0.5) 80%,
    transparent 100%);
  filter: blur(1px);
  opacity: 0.8;
}

/* Depth layer effect */
.glass-depth {
  box-shadow: 
    0 0 0 1px rgba(255, 255, 255, 0.08) inset,
    0 2px 4px rgba(0, 0, 0, 0.1),
    0 8px 16px rgba(0, 0, 0, 0.15),
    0 16px 32px rgba(0, 0, 0, 0.15);
}

/* Vibrant glass with color tint */
.glass-vibrant-green {
  background: linear-gradient(135deg,
    rgba(0, 255, 136, 0.15) 0%,
    rgba(0, 200, 108, 0.08) 100%),
    var(--glass-bg-dark);
}

.glass-vibrant-cyan {
  background: linear-gradient(135deg,
    rgba(6, 182, 212, 0.15) 0%,
    rgba(8, 145, 178, 0.08) 100%),
    var(--glass-bg-dark);
}

.glass-vibrant-purple {
  background: linear-gradient(135deg,
    rgba(168, 85, 247, 0.15) 0%,
    rgba(124, 58, 237, 0.08) 100%),
    var(--glass-bg-dark);
}