/* =========================================
   Glass Material Design Utility Classes
   ========================================= */

/* CSS Variables */
:root {
  /* Glass Primary Colors (3 max) */
  --glass-primary: 236, 72, 153;
  --glass-primary-rgb: rgba(var(--glass-primary));
  --glass-secondary: 255, 255, 255;
  --glass-secondary-rgb: rgba(var(--glass-secondary));
  --glass-accent: 244, 63, 94;
  --glass-accent-rgb: rgba(var(--glass-accent));
  
  /* Glass Opacity Levels */
  --glass-opacity-base: 0.1;
  --glass-opacity-strong: 0.15;
  --glass-opacity-subtle: 0.08;
  --glass-opacity-card: 0.98;
  --glass-opacity-form: 0.85;
  --glass-opacity-panel: 0.12;
  --glass-opacity-input: 0.75;
  --glass-opacity-input-focus: 0.90;
  --glass-opacity-dark: 0.8;
  
  /* Glass Blur Levels */
  --glass-blur-base: 12px;
  --glass-blur-strong: 16px;
  --glass-blur-subtle: 8px;
  --glass-blur-panel: 14px;
  --glass-blur-input: 10px;
  
  /* Glass Border Opacity */
  --glass-border-base: 0.3;
  --glass-border-strong: 0.4;
  --glass-border-subtle: 0.2;
  --glass-border-card: 0.5;
  --glass-border-form: 0.6;
  --glass-border-panel: 0.22;
  --glass-border-input: 0.55;
  --glass-border-input-focus: 0.55;
  --glass-border-dark: 0.1;
  
  /* Glass Shadows */
  --glass-shadow-base: 0 8px 32px rgba(0, 0, 0, 0.1);
  --glass-shadow-strong: 0 12px 40px rgba(0, 0, 0, 0.15);
  --glass-shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.08);
  --glass-shadow-card: 0 8px 32px rgba(0, 0, 0, 0.08);
  --glass-shadow-form: 0 8px 32px rgba(0, 0, 0, 0.1);
  --glass-shadow-panel: 0 10px 30px rgba(0, 0, 0, 0.10);
  --glass-shadow-dark: 0 8px 32px rgba(0, 0, 0, 0.3);
  --glass-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.1);
  
  /* Glass Border Radius */
  --glass-radius-base: 12px;
  --glass-radius-form: 16px;
  --glass-radius-panel: 14px;
  --glass-radius-input: 12px;
  
  /* Glass Transitions */
  --glass-transition: all 0.3s ease;
  --glass-transition-hover: all 0.3s ease;
}

/* Base Glass Material Classes */
.glass {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-base));
  backdrop-filter: blur(var(--glass-blur-base));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-base));
  box-shadow: var(--glass-shadow-base);
}

.glass-strong {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-strong));
  backdrop-filter: blur(var(--glass-blur-strong));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-strong));
  box-shadow: var(--glass-shadow-strong);
}

.glass-subtle {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-subtle));
  backdrop-filter: blur(var(--glass-blur-subtle));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-subtle));
  box-shadow: var(--glass-shadow-subtle);
}

/* Glass Background Layers */
.glass-bg-primary {
  background: linear-gradient(135deg, 
    rgba(var(--glass-primary), 0.9), 
    rgba(var(--glass-primary), 0.8), 
    rgba(var(--glass-primary), 0.7));
}

.glass-bg-secondary {
  background: linear-gradient(135deg, 
    rgba(var(--glass-secondary), 0.2), 
    rgba(var(--glass-secondary), 0.1));
}

.glass-bg-accent {
  background: linear-gradient(135deg, 
    rgba(var(--glass-primary), 0.3), 
    rgba(var(--glass-accent), 0.3));
}

.glass-bg-muted {
  background: linear-gradient(135deg, 
    rgba(0, 0, 0, 0.3), 
    rgba(0, 0, 0, 0.2), 
    rgba(0, 0, 0, 0.4));
}

.glass-bg-overlay {
  background: linear-gradient(180deg, transparent, rgba(0, 0, 0, 0.1));
}

/* Glass Hover Effects */
.glass-hover {
  transition: var(--glass-transition-hover);
}

.glass-hover:hover {
  background: rgba(var(--glass-secondary), 1);
  border-color: rgba(229, 231, 235, 0.8);
  box-shadow: var(--glass-shadow-hover);
  transform: translateY(-2px);
}

/* Desktop: keep cards bright on hover */
@media (min-width: 768px) {
  .glass-hover:hover {
    background: rgba(var(--glass-secondary), 1);
    border-color: rgba(229, 231, 235, 0.9);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  }
}

.glass-scale-hover {
  transition: var(--glass-transition);
}

.glass-scale-hover:hover {
  transform: scale(1.05);
}

/* Glass Button Styles */
.glass-btn {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-base));
  backdrop-filter: blur(var(--glass-blur-base));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-base));
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
  color: white;
  font-weight: 600;
  transition: var(--glass-transition);
}

.glass-btn:hover {
  background: rgba(var(--glass-secondary), 0.2);
  border-color: rgba(var(--glass-secondary), var(--glass-border-strong));
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.glass-btn-primary {
  background: rgba(var(--glass-primary), 0.9);
  border: 1px solid rgba(var(--glass-primary), 0.6);
}

.glass-btn-primary:hover {
  background: rgba(var(--glass-primary), 1);
  border-color: rgba(var(--glass-primary), 0.8);
}

/* Glass Card Styles */
.glass-card {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-card));
  backdrop-filter: blur(var(--glass-blur-base));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-card));
  box-shadow: var(--glass-shadow-card);
  border-radius: var(--glass-radius-base);
}

/* Glass Card for Forms */
.glass-form-card {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-form));
  backdrop-filter: blur(var(--glass-blur-strong));
  -webkit-backdrop-filter: blur(var(--glass-blur-strong));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-form));
  box-shadow: var(--glass-shadow-form);
  border-radius: var(--glass-radius-form);
}

/* Lighter glass card for desktop blog cards */
@media (min-width: 768px) {
  .glass-card {
    background: rgba(var(--glass-secondary), 1);
    border: 1px solid rgba(229, 231, 235, 0.6);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  }
}

/* Reusable "panel" + "input" aliases */
.glass-panel {
  position: relative;
  background: rgba(var(--glass-secondary), var(--glass-opacity-panel));
  backdrop-filter: blur(var(--glass-blur-panel));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-panel));
  box-shadow: var(--glass-shadow-panel);
  border-radius: var(--glass-radius-panel);
}

.glass-input {
  background: rgba(var(--glass-secondary), var(--glass-opacity-input));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-input));
  backdrop-filter: blur(var(--glass-blur-input));
  border-radius: var(--glass-radius-input);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}

.glass-input:focus {
  outline: none;
  background: rgba(var(--glass-secondary), var(--glass-opacity-input-focus));
  border-color: rgba(var(--glass-primary), var(--glass-border-input-focus));
  box-shadow: 0 0 0 3px rgba(var(--glass-primary), 0.20);
}

.glass-card-dark {
  background: rgba(0, 0, 0, var(--glass-opacity-dark));
  backdrop-filter: blur(var(--glass-blur-base));
  border: 1px solid rgba(var(--glass-secondary), var(--glass-border-dark));
  box-shadow: var(--glass-shadow-dark);
}

/* Glass Navigation Styles */
.glass-nav-item {
    position: relative;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.glass-nav-item:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transform: scale(1.05);
}

/* Glass Container Utilities */
.glass-container {
    position: relative;
    overflow: hidden;
}

.glass-container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(12px);
    z-index: -1;
}

.glass-container::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent, rgba(0, 0, 0, 0.05));
    z-index: -1;
}

/* Glass Text Effects */
.glass-text-shadow {
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.glass-text-highlight {
    /* Safe fallback: never make text transparent unless background-clip:text is supported */
    color: rgba(255, 255, 255, 0.95);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
    .glass-text-highlight {
        background: linear-gradient(135deg, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.4));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
    }
}

/* Dark mode glass variants */
@media (prefers-color-scheme: dark) {
    .glass {
        background: rgba(0, 0, 0, 0.3);
        border-color: rgba(255, 255, 255, 0.1);
    }

    .glass-card {
        background: rgba(0, 0, 0, 0.8);
        border-color: rgba(255, 255, 255, 0.1);
    }
}

/* Animation classes for glass elements */
@keyframes glass-fade-in {
    from {
        opacity: 0;
        transform: translateY(10px);
        backdrop-filter: blur(0px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
        backdrop-filter: blur(12px);
    }
}

.glass-fade-in {
    animation: glass-fade-in 0.5s ease-out;
}

@keyframes glass-pulse {
    0%, 100% {
        box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
    }
    50% {
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
    }
}

.glass-pulse {
    animation: glass-pulse 2s ease-in-out infinite;
}