/* 
 * Glassmorphism & Micro-interactions for Youth Innovations
 * Modern 2025 UI with engaging animations
 */

/* Accessibility - Reduced Motion Support */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

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

.glass-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 20px;
  box-shadow: 
    0 8px 32px 0 rgba(31, 38, 135, 0.37),
    inset 0 1px 1px rgba(255, 255, 255, 0.3);
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

/* Fallback for browsers that don't support backdrop-filter */
@supports not (backdrop-filter: blur(20px)) {
  .glass-card {
    background: rgba(255, 255, 255, 0.85);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  }
}

.glass-card:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-8px) scale(1.02);
  box-shadow: 
    0 20px 60px 0 rgba(31, 38, 135, 0.5),
    0 0 40px rgba(102, 126, 234, 0.4),
    inset 0 1px 1px rgba(255, 255, 255, 0.5);
}

/* ===== MAGNETIC BUTTON EFFECT ===== */

.magnetic-btn {
  position: relative;
  padding: 16px 32px;
  background: linear-gradient(135deg, rgba(102, 126, 234, 0.8), rgba(118, 75, 162, 0.8));
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50px;
  color: white;
  font-weight: 600;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.magnetic-btn::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, #667eea, #764ba2, #f093fb);
  border-radius: inherit;
  opacity: 0;
  z-index: -1;
  transition: opacity 0.3s;
  filter: blur(10px);
}

.magnetic-btn:hover::before {
  opacity: 1;
  animation: magnetic-glow 2s infinite;
}

.magnetic-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 40px rgba(102, 126, 234, 0.5);
}

@keyframes magnetic-glow {
  0%, 100% { filter: blur(8px); }
  50% { filter: blur(15px); }
}

/* ===== RIPPLE EFFECT ===== */

.ripple {
  position: relative;
  overflow: hidden;
}

.ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.6);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease-out, height 0.6s ease-out;
}

.ripple:active::after {
  width: 400px;
  height: 400px;
  opacity: 0;
}

/* ===== FLOATING ANIMATION ===== */

.float {
  animation: float 6s ease-in-out infinite;
}

.float-delayed {
  animation: float 6s ease-in-out 2s infinite;
}

@keyframes float {
  0%, 100% { 
    transform: translateY(0px); 
  }
  50% { 
    transform: translateY(-20px); 
  }
}

/* ===== SHIMMER LOADING ===== */

.shimmer {
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.1) 25%,
    rgba(255, 255, 255, 0.3) 50%,
    rgba(255, 255, 255, 0.1) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

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

/* ===== GRADIENT TEXT ===== */

.gradient-text {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 3s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ===== CATEGORY CARD ENHANCEMENTS ===== */

.category-card-enhanced {
  position: relative;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 24px;
  padding: 2rem;
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  cursor: pointer;
}

.category-card-enhanced::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s;
}

.category-card-enhanced:hover::before {
  opacity: 1;
  animation: border-flow 2s linear infinite;
}

@keyframes border-flow {
  0% { background-position: 0% 50%; }
  100% { background-position: 200% 50%; }
}

.category-card-enhanced:hover {
  background: rgba(255, 255, 255, 0.12);
  transform: translateY(-12px) scale(1.03);
  box-shadow: 
    0 25px 50px -12px rgba(0, 0, 0, 0.5),
    0 0 60px rgba(102, 126, 234, 0.3);
}

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

.icon-bounce {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.category-card-enhanced:hover .icon-bounce {
  animation: bounce 0.6s;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  25% { transform: translateY(-10px); }
  50% { transform: translateY(-5px); }
  75% { transform: translateY(-7px); }
}

/* ===== PULSE EFFECT ===== */

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

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

/* ===== HERO SECTION GLASS ===== */

.hero-glass-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(102, 126, 234, 0.8) 0%,
    rgba(118, 75, 162, 0.8) 100%
  );
  backdrop-filter: blur(100px);
}

.hero-glass-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(30px) saturate(200%);
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 30px;
  padding: 3rem;
  box-shadow: 
    0 30px 60px -12px rgba(0, 0, 0, 0.5),
    inset 0 1px 1px rgba(255, 255, 255, 0.4);
}

/* ===== READING PROGRESS BAR ===== */

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 4px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  transform-origin: left;
  z-index: 9999;
  transition: width 0.1s ease-out;
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.5);
}

/* ===== GLASS NAVIGATION ===== */

.glass-nav {
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 1000;
  transition: all 0.3s ease;
}

.glass-nav.scrolled {
  background: rgba(255, 255, 255, 0.15);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ===== TOOLTIP GLASS ===== */

[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) scale(0);
  padding: 8px 16px;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  color: white;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  z-index: 1000;
}

[data-tooltip]:hover::after {
  transform: translateX(-50%) scale(1);
  opacity: 1;
}

/* ===== DARK MODE SUPPORT ===== */

@media (prefers-color-scheme: dark) {
  .glass-card {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
  }
  
  .glass-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
  }
}

/* ===== MOBILE OPTIMIZATIONS ===== */

@media (max-width: 768px) {
  .glass-card:hover {
    transform: translateY(-4px) scale(1.01);
  }
  
  .category-card-enhanced:hover {
    transform: translateY(-6px) scale(1.02);
  }
  
  .magnetic-btn {
    padding: 14px 28px;
  }
}