:root {
  /* Colors */
  --bg-primary: #0a0e27;
  --bg-secondary: #151932;
  --bg-card: rgba(21, 25, 50, 0.6);
  --bg-card-hover: rgba(21, 25, 50, 0.8);
  
  /* Bitcoin Brand Colors */
  --bitcoin-orange: #f7931a;
  --bitcoin-gold: #ffb84d;
  --bitcoin-light: #ffd699;
  
  /* Accent Colors */
  --accent-green: #00ff88;
  --accent-red: #ff4757;
  --accent-blue: #3498db;
  --accent-purple: #9b59b6;
  
  /* Text Colors */
  --text-primary: #ffffff;
  --text-secondary: #b8bcc8;
  --text-muted: #6c7293;
  
  /* Gradients */
  --gradient-orange: linear-gradient(135deg, #f7931a 0%, #ffb84d 100%);
  --gradient-green: linear-gradient(135deg, #00ff88 0%, #00d9ff 100%);
  --gradient-red: linear-gradient(135deg, #ff4757 0%, #ff6b81 100%);
  --gradient-purple: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  
  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 20px rgba(247, 147, 26, 0.3);
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Background Animation */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(247, 147, 26, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 255, 136, 0.1) 0%, transparent 50%);
  pointer-events: none;
  z-index: -1;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-lg);
}

/* Header */
header {
  text-align: center;
  padding: var(--spacing-xl) 0;
  position: relative;
}

.logo {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  animation: float 3s ease-in-out infinite;
}

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

h1 {
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
}

.subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Current Price Hero */
.price-hero {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-normal);
}

.price-hero:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
}

.price-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--spacing-sm);
}

.current-price {
  font-size: 4rem;
  font-weight: 700;
  background: var(--gradient-orange);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-sm);
}

.price-change {
  font-size: 1.2rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
}

.price-change.positive {
  background: rgba(0, 255, 136, 0.1);
  color: var(--accent-green);
}

.price-change.negative {
  background: rgba(255, 71, 87, 0.1);
  color: var(--accent-red);
}

/* Chart Section */
.chart-section {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.section-title::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--gradient-orange);
  border-radius: 2px;
}

.chart-container {
  position: relative;
  height: 400px;
  margin-bottom: var(--spacing-md);
}

/* Time Range Selector */
.time-range {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.time-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--bg-secondary);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 0.9rem;
  font-weight: 500;
}

.time-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.time-btn.active {
  background: var(--gradient-orange);
  color: var(--text-primary);
  border-color: transparent;
}

/* Prediction & Recommendations Grid */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.info-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.info-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--gradient-orange);
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.info-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.info-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.card-value {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.card-description {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
}

/* Prediction Card Specific */
.prediction-card .card-value {
  background: var(--gradient-purple);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Buy Card */
.buy-card {
  border-color: rgba(0, 255, 136, 0.2);
}

.buy-card .card-value {
  color: var(--accent-green);
}

.buy-card::before {
  background: var(--gradient-green);
}

/* Sell Card */
.sell-card {
  border-color: rgba(255, 71, 87, 0.2);
}

.sell-card .card-value {
  color: var(--accent-red);
}

.sell-card::before {
  background: var(--gradient-red);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  text-align: center;
  transition: all var(--transition-fast);
}

.stat-card:hover {
  transform: scale(1.05);
  background: var(--bg-card-hover);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: var(--spacing-xs);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

/* Loading State */
.loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl);
  gap: var(--spacing-md);
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--bitcoin-orange);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

.loading-text {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Error State */
.error {
  background: rgba(255, 71, 87, 0.1);
  border: 1px solid var(--accent-red);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--accent-red);
}

/* Footer */
footer {
  text-align: center;
  padding: var(--spacing-xl) 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.footer-link {
  color: var(--bitcoin-orange);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: var(--bitcoin-light);
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }
  
  h1 {
    font-size: 2rem;
  }
  
  .current-price {
    font-size: 2.5rem;
  }
  
  .chart-container {
    height: 300px;
  }
  
  .info-grid {
    grid-template-columns: 1fr;
  }
  
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.5rem;
  }
  
  .current-price {
    font-size: 2rem;
  }
  
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* Smooth Scrolling */
html {
  scroll-behavior: smooth;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--bitcoin-orange);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--bitcoin-gold);
}