/* 
 * LEADERBOARD ENHANCED CSS
 * Push Arena-inspired design system for leaderboard pages
 * Features: Glassmorphism, gradients, animations, and premium visual effects
 */

/* ========================================
 * ROOT VARIABLES & DESIGN TOKENS
 * ======================================== */
:root {
  /* Primary gradients matching push_arena */
  --leaderboard-primary-gradient: linear-gradient(135deg, #601efa 0%, #fa05d9 100%);
  --leaderboard-secondary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --leaderboard-gold-gradient: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  --leaderboard-silver-gradient: linear-gradient(135deg, #e5e7eb 0%, #9ca3af 100%);
  --leaderboard-bronze-gradient: linear-gradient(135deg, #d97706 0%, #92400e 100%);
  
  /* Colors */
  --leaderboard-primary: #601efa;
  --leaderboard-secondary: #fa05d9;
  --leaderboard-accent: #fbbf24;
  --leaderboard-dark: #1a1a2e;
  --leaderboard-light: rgba(255, 255, 255, 0.95);
  
  /* Glassmorphism effects - backdrop-filter removed for GPU performance at 12k+ users */
  --glass-bg: rgba(20, 20, 35, 0.95);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
  --glass-blur: none;
  
  /* Spacing */
  --navbar-height: 60px;
  --section-padding: 2rem;
  
  /* Animations */
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: all 0.5s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* ========================================
 * HERO SECTION ENHANCEMENTS
 * ======================================== */
.leaderboard-hero {
  position: relative;
  padding: 3rem 0;
  background: radial-gradient(ellipse at top, rgba(96, 30, 250, 0.1), transparent 50%),
              radial-gradient(ellipse at bottom, rgba(250, 5, 217, 0.1), transparent 50%);
  overflow: hidden;
}

.leaderboard-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: 
    repeating-linear-gradient(90deg, 
      transparent, 
      transparent 2px, 
      rgba(96, 30, 250, 0.03) 2px, 
      rgba(96, 30, 250, 0.03) 4px
    ),
    repeating-linear-gradient(0deg, 
      transparent, 
      transparent 2px, 
      rgba(250, 5, 217, 0.03) 2px, 
      rgba(250, 5, 217, 0.03) 4px
    );
  animation: heroGrid 20s linear infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes heroGrid {
  0% { transform: translate(0, 0); }
  100% { transform: translate(4px, 4px); }
}

.leaderboard-title-glow {
  position: relative;
  display: inline-block;
  font-size: 3.5rem;
  font-weight: 900;
  background: var(--leaderboard-gold-gradient);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 40px rgba(251, 191, 36, 0.5);
  animation: titlePulse 3s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes titlePulse {
  0%, 100% { 
    filter: brightness(1) drop-shadow(0 0 20px rgba(251, 191, 36, 0.4)); 
  }
  50% { 
    filter: brightness(1.2) drop-shadow(0 0 30px rgba(251, 191, 36, 0.6)); 
  }
}

/* ========================================
 * TAB NAVIGATION ENHANCEMENTS
 * ======================================== */
.enhanced-tab-container {
  background: var(--glass-bg);
  /* PERF: backdrop-filter removed - causes GPU lag at 12k+ users */
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 0.5rem;
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
}

.enhanced-tab-container::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--leaderboard-primary-gradient);
  opacity: 0.05;
  animation: tabShimmer 8s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes tabShimmer {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

.enhanced-tab-button {
  position: relative;
  padding: 0.875rem 1.75rem;
  background: rgba(55, 65, 81, 0.3);
  border: 1px solid rgba(75, 85, 99, 0.3);
  border-radius: 14px;
  color: rgba(209, 213, 219, 0.9);
  font-weight: 600;
  transition: var(--transition-smooth);
  cursor: pointer;
  overflow: hidden;
  /* PERF: backdrop-filter removed - causes GPU lag at 12k+ users */
}

.enhanced-tab-button::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--leaderboard-primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.enhanced-tab-button:hover {
  background: rgba(75, 85, 99, 0.5);
  border-color: rgba(96, 30, 250, 0.5);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(96, 30, 250, 0.2);
}

.enhanced-tab-button:hover::before {
  opacity: 0.1;
}

.enhanced-tab-button.active {
  background: var(--leaderboard-primary-gradient);
  border-color: transparent;
  color: white;
  box-shadow: 0 0 25px rgba(96, 30, 250, 0.5);
  animation: tabGlow 2s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes tabGlow {
  0%, 100% { box-shadow: 0 0 25px rgba(96, 30, 250, 0.5); }
  50% { box-shadow: 0 0 35px rgba(250, 5, 217, 0.6); }
}

/* ========================================
 * LEADERBOARD CARD ENHANCEMENTS
 * ======================================== */
.enhanced-leaderboard-card {
  background: linear-gradient(135deg, rgba(25, 25, 35, 0.98), rgba(35, 35, 50, 0.98));
  /* PERF: backdrop-filter removed - causes GPU lag at 12k+ users */
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 2rem;
  position: relative;
  overflow: hidden;
  box-shadow:
    0 20px 40px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.enhanced-leaderboard-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(96, 30, 250, 0.6), 
    rgba(250, 5, 217, 0.6), 
    transparent
  );
  animation: cardTopGlow 3s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

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

/* ========================================
 * STICKY USER POSITION (TOP)
 * ======================================== */
.sticky-user-top {
  position: sticky;
  top: calc(var(--navbar-height) + 1rem);
  z-index: 100;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(-20px);
  animation: stickySlideDown 0.5s ease-out forwards;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes stickySlideDown {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sticky-user-card {
  background: linear-gradient(135deg, rgba(50, 20, 120, 0.95), rgba(100, 20, 80, 0.95));
  /* PERF: backdrop-filter removed - causes GPU lag at 12k+ users */
  border: 2px solid rgba(96, 30, 250, 0.4);
  border-radius: 16px;
  padding: 1rem 1.5rem;
  box-shadow:
    0 10px 30px rgba(96, 30, 250, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.1);
  position: relative;
  overflow: hidden;
}

.sticky-user-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: translateX(-100%);
  animation: stickyShine 3s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes stickyShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.sticky-user-label {
  position: absolute;
  top: -10px;
  left: 20px;
  background: var(--leaderboard-primary-gradient);
  color: white;
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 4px 10px rgba(96, 30, 250, 0.4);
}

/* ========================================
 * LEADERBOARD ENTRIES
 * ======================================== */
.enhanced-entry {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 16px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  transition: var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.enhanced-entry::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(96, 30, 250, 0.05), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s ease;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.enhanced-entry:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(96, 30, 250, 0.3);
  transform: translateX(4px);
  box-shadow: 0 4px 20px rgba(96, 30, 250, 0.15);
}

.enhanced-entry:hover::before {
  transform: translateX(100%);
}

/* Top 3 special styling */



/* ========================================
 * RANK MEDALS & BADGES
 * ======================================== */
.enhanced-medal {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.125rem;
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: var(--transition-smooth);
}

.enhanced-medal::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  padding: 2px;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.5), transparent);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.enhanced-medal:hover {
  transform: scale(1.1) rotate(5deg);
}

.enhanced-medal:hover::before {
  opacity: 1;
  animation: medalSpin 2s linear infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes medalSpin {
  to { transform: rotate(360deg); }
}

.enhanced-medal.gold {
  background: var(--leaderboard-gold-gradient);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  box-shadow: 
    0 0 20px rgba(251, 191, 36, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.3);
}

.enhanced-medal.silver {
  background: var(--leaderboard-silver-gradient);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  box-shadow: 
    0 0 20px rgba(229, 231, 235, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.3);
}

.enhanced-medal.bronze {
  background: var(--leaderboard-bronze-gradient);
  color: white;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  box-shadow: 
    0 0 20px rgba(217, 119, 6, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.3);
}

/* ========================================
 * YOU INDICATOR ENHANCEMENT
 * ======================================== */
.enhanced-you-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  background: var(--leaderboard-primary-gradient);
  border-radius: 999px;
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  box-shadow: 0 0 20px rgba(96, 30, 250, 0.5);
  position: relative;
  overflow: hidden;
  animation: youBadgePulse 2s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes youBadgePulse {
  0%, 100% { 
    box-shadow: 0 0 20px rgba(96, 30, 250, 0.5);
    transform: scale(1);
  }
  50% { 
    box-shadow: 0 0 30px rgba(250, 5, 217, 0.7);
    transform: scale(1.05);
  }
}

.enhanced-you-badge::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.3), transparent);
  transform: translateX(-100%);
  animation: youBadgeShine 2s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes youBadgeShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.enhanced-you-badge .sparkle {
  animation: sparkleRotate 3s linear infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes sparkleRotate {
  to { transform: rotate(360deg); }
}

/* ========================================
 * SCORE DISPLAYS
 * ======================================== */
.enhanced-score {
  font-size: 1.25rem;
  font-weight: 700;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  display: inline-block;
  animation: scoreGlow 3s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes scoreGlow {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.2) drop-shadow(0 0 10px rgba(251, 191, 36, 0.5)); }
}

.enhanced-score-label {
  font-size: 0.75rem;
  color: rgba(156, 163, 175, 0.9);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  display: inline-block;
  margin-inline-start: 0.25rem;
}

/* ========================================
 * LOADING STATES
 * ======================================== */
.enhanced-skeleton {
  background: linear-gradient(90deg, 
    rgba(55, 65, 81, 0.3) 25%, 
    rgba(75, 85, 99, 0.3) 50%, 
    rgba(55, 65, 81, 0.3) 75%
  );
  background-size: 200% 100%;
  animation: enhancedSkeletonLoading 1.5s infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
  border-radius: 12px;
  position: relative;
  overflow: hidden;
}

.enhanced-skeleton::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(96, 30, 250, 0.1), transparent);
  animation: skeletonShine 1.5s infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

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

@keyframes skeletonShine {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ========================================
 * NAVIGATION BUTTONS
 * ======================================== */
.enhanced-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  background: linear-gradient(135deg, rgba(55, 65, 81, 0.5), rgba(75, 85, 99, 0.4));
  border: 1px solid rgba(96, 30, 250, 0.2);
  border-radius: 12px;
  color: rgba(209, 213, 219, 0.9);
  font-weight: 600;
  font-size: 0.875rem;
  transition: var(--transition-smooth);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  /* PERF: backdrop-filter removed - causes GPU lag at 12k+ users */
}

.enhanced-nav-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--leaderboard-primary-gradient);
  opacity: 0;
  transition: opacity 0.3s ease;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

.enhanced-nav-btn:hover:not(:disabled) {
  background: linear-gradient(135deg, rgba(75, 85, 99, 0.6), rgba(96, 30, 250, 0.3));
  border-color: rgba(96, 30, 250, 0.5);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(96, 30, 250, 0.3);
}

.enhanced-nav-btn:hover:not(:disabled)::before {
  opacity: 0.15;
}

.enhanced-nav-btn.active {
  background: var(--leaderboard-primary-gradient);
  border-color: transparent;
  color: white;
  box-shadow: 0 0 20px rgba(96, 30, 250, 0.4);
}

.enhanced-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  filter: grayscale(0.5);
}

/* ========================================
 * SCROLL EFFECTS
 * ======================================== */
.leaderboard-list::-webkit-scrollbar {
  width: 8px;
}

.leaderboard-list::-webkit-scrollbar-track {
  background: rgba(55, 65, 81, 0.2);
  border-radius: 4px;
}

.leaderboard-list::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, rgba(96, 30, 250, 0.6), rgba(250, 5, 217, 0.6));
  border-radius: 4px;
  transition: background 0.3s ease;
}

.leaderboard-list::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, rgba(96, 30, 250, 0.8), rgba(250, 5, 217, 0.8));
}

/* ========================================
 * RESPONSIVE DESIGN
 * ======================================== */
@media (max-width: 768px) {
  .leaderboard-title-glow {
    font-size: 2.5rem;
  }
  
  .enhanced-leaderboard-card {
    padding: 1.5rem;
    border-radius: 20px;
  }
  
  .enhanced-medal {
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
  
  .enhanced-tab-button {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
  }
  
  .sticky-user-top {
    top: calc(var(--navbar-height) + 0.5rem);
    margin-bottom: 1rem;
  }
  
  .enhanced-you-badge {
    padding: 0.25rem 0.625rem;
    font-size: 0.7rem;
  }
}

@media (max-width: 480px) {
  .leaderboard-title-glow {
    font-size: 2rem;
  }
  
  .enhanced-leaderboard-card {
    padding: 1rem;
    border-radius: 16px;
  }
  
  .enhanced-entry {
    padding: 0.75rem;
    border-radius: 12px;
  }
  
  .enhanced-medal {
    width: 36px;
    height: 36px;
    font-size: 0.875rem;
  }
  
  .enhanced-score {
    font-size: 1rem;
  }
  
  .enhanced-score-label {
    font-size: 0.75rem;
  }
}

/* ========================================
 * ANIMATION UTILITIES
 * ======================================== */
.fade-in {
  animation: enhanced-fadeIn 0.5s ease-out forwards;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

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



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

.scale-in {
  animation: scaleIn 0.3s ease-out forwards;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes scaleIn {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* ========================================
 * SPECIAL EFFECTS
 * ======================================== */




@keyframes confettiFall {
  0% {
    transform: translateY(-100vh) rotate(0deg);
    opacity: 1;
  }
  100% {
    transform: translateY(100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ========================================
 * HOVER STATES & MICRO-INTERACTIONS
 * ======================================== */






/* Floating animation for special elements */
.float-animation {
  animation: float 3s ease-in-out infinite;
  /* GPU acceleration */
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

/* Removed unused @keyframes pulse - duplicate, not referenced */