@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  /* Modern Black-to-White Gradient System */
  --bg-gradient: linear-gradient(135deg, #000000 0%, #1a1a1a 25%, #2d2d2d 75%, #1a1a1a 100%);
  --primary-gradient: linear-gradient(135deg, #000000 0%, #2d2d2d 50%, #4a4a4a 100%);
  --secondary-gradient: linear-gradient(135deg, #1a1a1a 0%, #3d3d3d 100%);
  --accent-gradient: linear-gradient(135deg, #2d2d2d 0%, #5a5a5a 100%);
  --text-gradient: linear-gradient(135deg, #ffffff 0%, #e5e5e5 50%, #cccccc 100%);
  
  /* Glass Morphism - Enhanced */
  --glass-bg: rgba(255, 255, 255, 0.08);
  --glass-bg-strong: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.16);
  --glass-border-strong: rgba(255, 255, 255, 0.24);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  --glass-shadow-strong: 0 16px 40px rgba(0, 0, 0, 0.6);
  
  /* Interactive States */
  --hover-bg: rgba(255, 255, 255, 0.16);
  --active-bg: rgba(255, 255, 255, 0.20);
  --focus-ring: rgba(255, 255, 255, 0.24);
  
  /* Modern Spacing Scale */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Border Radius Scale */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-2xl: 24px;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  margin: 0;
  padding: 0;
  background: var(--bg-gradient);
  background-attachment: fixed;
  min-height: 100vh;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Modern Glass Morphism System */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-radius: var(--radius-xl);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.glass-card {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-border-strong);
  box-shadow: var(--glass-shadow-strong);
  transition: all 0.4s 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, rgba(255, 255, 255, 0.4), transparent);
  opacity: 0.6;
}

.glass-card:hover {
  transform: translateY(-2px);
  background: var(--hover-bg);
  border-color: var(--glass-border-strong);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.7);
}

/* Animation utilities */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

.animate-fade-in {
  animation: fadeIn 0.6s ease-out;
}

.animate-slide-in {
  animation: slideIn 0.6s ease-out;
}

.animate-pulse-slow {
  animation: pulse 2s infinite;
}

/* Modern Button System */
.btn-primary {
  background: var(--primary-gradient);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  padding: var(--space-lg) var(--space-xl);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: var(--glass-shadow);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  outline: none;
}

.btn-primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.6s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow-strong);
  background: linear-gradient(135deg, #1a1a1a 0%, #3d3d3d 50%, #5a5a5a 100%);
}

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

.btn-primary:focus {
  box-shadow: var(--glass-shadow-strong), 0 0 0 3px var(--focus-ring);
}

.btn-secondary {
  background: var(--glass-bg-strong);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: white;
  font-weight: 500;
  padding: var(--space-lg) var(--space-xl);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  outline: none;
}

.btn-secondary:hover {
  background: var(--hover-bg);
  border-color: var(--glass-border-strong);
  transform: translateY(-2px);
}

.btn-secondary:focus {
  box-shadow: 0 0 0 3px var(--focus-ring);
}

/* Modern Input System */
.input-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: white;
  padding: var(--space-lg) var(--space-lg);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  font-size: 1rem;
  font-weight: 400;
  outline: none;
}

.input-glass::placeholder {
  color: rgba(255, 255, 255, 0.6);
  font-weight: 400;
}

.input-glass:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
}

.input-glass:focus {
  border-color: var(--focus-ring);
  background: var(--glass-bg-strong);
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.12);
}

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

/* Loading spinner */
.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Skeleton loading animation */
.skeleton-loader {
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.1) 25%, rgba(255, 255, 255, 0.2) 50%, rgba(255, 255, 255, 0.1) 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

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

/* Lazy image loading states */
.lazy {
  filter: blur(5px);
  transition: filter 0.3s;
}

.lazy.loaded {
  filter: none;
}

/* Performance timing display */
.timing-badge {
  background: rgba(0, 255, 0, 0.1);
  border: 1px solid rgba(0, 255, 0, 0.3);
  color: rgba(0, 255, 0, 0.8);
  padding: 0.25rem 0.5rem;
  border-radius: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.timing-badge::before {
  content: '⏱️';
  font-size: 0.625rem;
}

/* Panel composition grid */
.panel-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.panel-item {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(15px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  overflow: hidden;
  transition: all 0.3s ease;
}

.panel-item:hover {
  transform: scale(1.02);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
}

/* Responsive design */
@media (max-width: 768px) {
  .panel-grid {
    grid-template-columns: 1fr;
  }
  
  .glass-card {
    border-radius: 12px;
  }
}

/* Modern Text Gradients */
.gradient-text {
  background: var(--text-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-weight: 700;
}

/* Performance indicator colors */
.perf-excellent { color: #10b981; }
.perf-good { color: #f59e0b; }
.perf-poor { color: #ef4444; }

.gradient-text-subtle {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Story template cards */
.template-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 20px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.template-card:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.template-card.selected {
  background: rgba(255, 255, 255, 0.3);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Story progression cards */
.progression-card {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  padding: 24px;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  min-height: 400px;
}

.progression-card:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-6px) scale(1.02);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.2);
}

.progression-card.selected {
  background: rgba(255, 255, 255, 0.25);
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.2);
}

/* Series chapter navigation */
.chapter-nav-button {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 2px solid transparent;
  border-radius: 12px;
  padding: 16px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.chapter-nav-button:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateY(-2px);
}

.chapter-nav-button.active {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Enhanced animations for story progression */
@keyframes progressionSlideIn {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.progression-card {
  animation: progressionSlideIn 0.6s ease-out;
}

.progression-card:nth-child(2) {
  animation-delay: 0.1s;
}

.progression-card:nth-child(3) {
  animation-delay: 0.2s;
}

/* Series completion celebration effects */
@keyframes celebrationGlow {
  0%, 100% {
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(255, 255, 255, 0.6);
  }
}

.series-complete-glow {
  animation: celebrationGlow 2s ease-in-out infinite;
}

/* Enhanced hover effects */
@keyframes scaleHover {
  to {
    transform: scale(1.02);
  }
}

.hover\:scale-102:hover {
  animation: scaleHover 0.2s ease-out forwards;
}

.hover\:scale-105:hover {
  transform: scale(1.05);
}

/* Progress indicators */
.progress-step {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  width: 12px;
  height: 12px;
  transition: all 0.3s ease;
}

.progress-step.active {
  background: rgba(255, 255, 255, 0.8);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
}

.progress-step.completed {
  background: rgba(34, 197, 94, 0.8);
  box-shadow: 0 0 15px rgba(34, 197, 94, 0.5);
}

/* Series statistics display */
.series-stats {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 2rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.series-stat-item {
  text-align: center;
  padding: 0 1rem;
}

.series-stat-value {
  font-size: 2rem;
  font-weight: 800;
  color: white;
  margin-bottom: 0.5rem;
}

.series-stat-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.series-stat-divider {
  width: 1px;
  height: 2rem;
  background: rgba(255, 255, 255, 0.2);
}

/* Mobile responsiveness for new components */
@media (max-width: 768px) {
  .progression-card {
    padding: 16px;
    min-height: 300px;
  }
  
  .series-stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .series-stat-divider {
    width: 100%;
    height: 1px;
  }
  
  .chapter-nav-button {
    padding: 12px;
  }
}