/* ============================================
   GLASSMORPHISM / LIQUID GLASS DESIGN SYSTEM
   ============================================ */

:root {
  /* Glass effect variables */
  --glass-bg: rgba(255, 255, 255, 0.05);
  --glass-bg-hover: rgba(255, 255, 255, 0.08);
  --glass-bg-active: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.18);
  --glass-border-light: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
  --glass-shadow-hover: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
  --glass-blur: blur(20px);
  --glass-blur-strong: blur(40px);
  
  /* Gradient overlays */
  --glass-gradient-1: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, rgba(255, 255, 255, 0.05) 100%);
  --glass-gradient-2: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(147, 51, 234, 0.1) 100%);
}

/* Base glass effect */
.glass {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

/* Glass with gradient overlay */
.glass-gradient {
  background: var(--glass-gradient-1);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  position: relative;
}

/* Strong glass effect (more blur, more opacity) */
.glass-strong {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

/* Glass card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 1rem;
  box-shadow: var(--glass-shadow);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.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%);
  pointer-events: none;
  z-index: 3;
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 
    var(--glass-shadow-hover),
    0 0 20px rgba(255, 255, 255, calc(var(--light-opacity, 0) * 0.1));
  transform: translateY(-2px);
}

/* Glass panel */
.glass-panel {
  background: rgba(15, 23, 42, 0.4);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border-light);
  box-shadow: var(--glass-shadow);
}

/* Glass sidebar */
.glass-sidebar {
  background: rgba(11, 16, 32, 0.6);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  border-right: 1px solid var(--glass-border-light);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.3);
}

/* Glass button */
.glass-button {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  color: white;
  transition: all 0.2s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.glass-button:hover {
  background: var(--glass-bg-hover);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
  box-shadow: 
    0 4px 12px rgba(0, 0, 0, 0.2),
    0 0 15px rgba(255, 255, 255, calc(var(--light-opacity, 0) * 0.15));
}

.glass-button:active {
  background: var(--glass-bg-active);
  transform: translateY(0);
}

/* Glass input */
.glass-input {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-light);
  color: white;
  transition: all 0.2s ease;
}

.glass-input:focus {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.3);
  outline: none;
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.glass-input::placeholder {
  color: rgba(255, 255, 255, 0.4);
}

/* Glass navigation item */
.glass-nav-item {
  background: transparent;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid transparent;
  transition: all 0.2s ease;
  position: relative;
}

.glass-nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: linear-gradient(180deg, #3b82f6 0%, #9333ea 100%);
  border-radius: 0 2px 2px 0;
  transition: height 0.2s ease;
}

.glass-nav-item:hover {
  background: var(--glass-bg);
  border-color: var(--glass-border-light);
}

.glass-nav-item.active {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border);
}

.glass-nav-item.active::before {
  height: 60%;
}

/* Glass header/topbar */
.glass-header {
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border-light);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

/* Animated glass shimmer effect */
@keyframes glass-shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

.glass-shimmer {
  position: relative;
  overflow: hidden;
}

.glass-shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(255, 255, 255, 0.1) 50%,
    transparent 100%
  );
  background-size: 1000px 100%;
  animation: glass-shimmer 3s infinite;
  pointer-events: none;
}

/* Glass with colored accent */
.glass-accent-blue {
  border-left: 3px solid rgba(59, 130, 246, 0.6);
  box-shadow: -4px 0 16px rgba(59, 130, 246, 0.2), var(--glass-shadow);
}

.glass-accent-purple {
  border-left: 3px solid rgba(147, 51, 234, 0.6);
  box-shadow: -4px 0 16px rgba(147, 51, 234, 0.2), var(--glass-shadow);
}

.glass-accent-green {
  border-left: 3px solid rgba(34, 197, 94, 0.6);
  box-shadow: -4px 0 16px rgba(34, 197, 94, 0.2), var(--glass-shadow);
}

/* Glass modal/overlay */
.glass-overlay {
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.glass-modal {
  background: rgba(15, 23, 42, 0.8);
  backdrop-filter: var(--glass-blur-strong);
  -webkit-backdrop-filter: var(--glass-blur-strong);
  border: 1px solid var(--glass-border);
  border-radius: 1.5rem;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Glass scrollbar */
.glass-scrollbar::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.glass-scrollbar::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 4px;
}

.glass-scrollbar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  border: 2px solid transparent;
  background-clip: padding-box;
}

.glass-scrollbar::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.3);
  background-clip: padding-box;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .glass {
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
  }
  
  .glass-strong {
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
  }
}

/* Utility classes for quick application */
.bg-glass { background: var(--glass-bg) !important; }
.bg-glass-hover { background: var(--glass-bg-hover) !important; }
.border-glass { border-color: var(--glass-border) !important; }
.shadow-glass { box-shadow: var(--glass-shadow) !important; }
.backdrop-blur-glass { 
  backdrop-filter: var(--glass-blur) !important;
  -webkit-backdrop-filter: var(--glass-blur) !important;
}

/* Light mode overrides */
body.light-mode .glass-card {
  background: rgba(255, 255, 255, 0.7) !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
}

body.light-mode .glass-card::before {
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(0, 0, 0, 0.1) 50%, 
    transparent 100%);
}

body.light-mode .glass-card:hover {
  background: rgba(255, 255, 255, 0.8) !important;
  border-color: rgba(0, 0, 0, 0.15) !important;
}

body.light-mode .glass {
  background: rgba(255, 255, 255, 0.6) !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
}

body.light-mode .glass-button {
  color: #1e293b !important;
  background: rgba(255, 255, 255, 0.6) !important;
  border-color: rgba(0, 0, 0, 0.1) !important;
}

body.light-mode .glass-input {
  background: rgba(255, 255, 255, 0.8) !important;
  border-color: rgba(0, 0, 0, 0.15) !important;
  color: #1e293b !important;
}

body.light-mode .glass-input::placeholder {
  color: rgba(30, 41, 59, 0.5) !important;
}