/* CSS Variables for Light and Dark Mode */
:root {
  /* Light Mode Colors */
  --bg-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --bg-secondary: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.25);
  --bg-overlay: rgba(255, 255, 255, 0.9);
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-accent: #3b82f6;
  --accent-primary: #667eea;
  --accent-secondary: #764ba2;
  --accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  --border-color: rgba(255, 255, 255, 0.3);
  --shadow-light: rgba(0, 0, 0, 0.1);
  --shadow-medium: rgba(0, 0, 0, 0.15);
  --shadow-strong: rgba(0, 0, 0, 0.25);
  --glow-color: rgba(102, 126, 234, 0.6);
  --card-bg: rgba(255, 255, 255, 0.9);
  --success-color: #28a745;
  --error-color: #dc3545;
  --warning-color: #ffc107;
  --chart-bg: rgba(248, 249, 250, 0.9);
}

/* Dark Mode Colors */
body.dark-mode {
  --bg-primary: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --bg-secondary: #1e293b;
  --bg-glass: rgba(30, 41, 59, 0.25);
  --bg-overlay: rgba(30, 41, 59, 0.9);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-accent: #60a5fa;
  --accent-primary: #60a5fa;
  --accent-secondary: #a78bfa;
  --accent-gradient: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
  --border-color: rgba(255, 255, 255, 0.1);
  --shadow-light: rgba(0, 0, 0, 0.3);
  --shadow-medium: rgba(0, 0, 0, 0.5);
  --shadow-strong: rgba(0, 0, 0, 0.8);
  --glow-color: rgba(96, 165, 250, 0.6);
  --card-bg: rgba(30, 41, 59, 0.9);
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;
  --chart-bg: rgba(15, 23, 42, 0.9);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  transition: all 0.3s ease;
  opacity: 0;
  animation: fadeIn 0.8s ease forwards;
  min-height: 100vh;
}

body.loaded {
  opacity: 1;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}

/* Animated Background */
.bg-animation {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  overflow: hidden;
}

.floating-shapes {
  position: absolute;
  width: 100%;
  height: 100%;
}

.floating-shapes::before,
.floating-shapes::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  background: var(--accent-gradient);
  opacity: 0.05;
  animation: float 20s infinite ease-in-out;
}

.floating-shapes::before {
  width: 400px;
  height: 400px;
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}

.floating-shapes::after {
  width: 300px;
  height: 300px;
  bottom: -150px;
  left: -150px;
  animation-delay: 10s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

@keyframes subtle-bob {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-6px);
  }
  100% {
    transform: translateY(0px);
  }
}

/* Theme Toggle */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 50px;
  width: 50px;
  height: 25px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-light);
}

.theme-toggle:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 25px var(--shadow-strong), 0 0 20px var(--glow-color);
  border-color: var(--accent-primary);
}

.sun-icon, .moon-icon {
  font-size: 16px;
  transition: all 0.3s ease;
  filter: drop-shadow(0 2px 4px var(--shadow-light));
}

.moon-icon {
  display: none;
}

/* Container */
.container {
  max-width: 95%;
  margin: 40px auto;
  background: var(--bg-overlay);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 40px;
  box-shadow: 0 20px 40px var(--shadow-medium);
  position: relative;
  z-index: 1;
}

/* Headers */
h1 {
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 40px;
  font-size: 2.5rem;
  font-weight: 700;
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

h1::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 3px;
  background: var(--accent-gradient);
  border-radius: 2px;
}

h2 {
  color: var(--text-primary);
  margin: 30px 0 20px 0;
  font-size: 1.8rem;
  font-weight: 600;
  position: relative;
  padding-left: 20px;
}

h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  background: var(--accent-gradient);
  border-radius: 50%;
}

/* Stats Container */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 25px;
  margin-bottom: 40px;
}

.stat-card {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
  animation: subtle-bob 3s ease-in-out infinite;
  transform-style: preserve-3d;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

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

.stat-card:hover {
  transform: translateY(-15px) scale(1.03) rotateX(5deg);
  box-shadow: 0 0 40px var(--glow-color), 0 15px 30px var(--shadow-strong);
  border-color: var(--accent-primary);
  animation-play-state: paused;
}

.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--accent-primary);
  margin-bottom: 10px;
  display: block;
  animation: countUp 2s ease-out;
}

@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.stat-label {
  font-size: 1rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Chart Container */
.chart-container {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  margin: 40px 0;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

.chart-container:hover {
  transform: translateY(-10px);
  box-shadow: 0 0 30px var(--glow-color), 0 10px 20px var(--shadow-strong);
}

.chart-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.chart-container h2 {
  margin-top: 0;
}

.chart-container h2::before {
  display: none;
}

#requestsChart {
  max-height: 300px;
}

/* Requests Container */
.requests-container {
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 30px;
  margin: 40px 0;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.1);
}

.requests-container:hover {
  transform: translateY(-10px);
  box-shadow: 0 0 30px var(--glow-color), 0 10px 20px var(--shadow-strong);
}

.requests-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent-gradient);
}

.requests-container h2 {
  margin-top: 0;
}

.requests-container h2::before {
  display: none;
}

/* Table */
.requests-table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  background: transparent;
  border-radius: 12px;
  overflow: hidden;
}

.requests-table th,
.requests-table td {
  padding: 15px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.requests-table th {
  background: var(--accent-gradient);
  color: white;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 14px;
}

.requests-table tr:hover td {
  background: var(--bg-glass);
  transform: scale(1.01);
}

.requests-table tr:last-child td {
  border-bottom: none;
}

/* Status Indicators */
.status-success {
  color: var(--success-color);
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 12px;
  background: rgba(40, 167, 69, 0.1);
  border: 1px solid rgba(40, 167, 69, 0.2);
}

.status-error {
  color: var(--error-color);
  font-weight: 600;
  padding: 4px 8px;
  border-radius: 12px;
  background: rgba(220, 53, 69, 0.1);
  border: 1px solid rgba(220, 53, 69, 0.2);
}

/* Pagination */
.pagination-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 30px;
  gap: 15px;
}

.pagination-container button {
  padding: 10px 20px;
  background: var(--accent-gradient);
  color: white;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px var(--shadow-medium);
}

.pagination-container button:hover:not(:disabled) {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px var(--shadow-strong);
}

.pagination-container button:disabled {
  background: var(--text-secondary);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

#page-info {
  color: var(--text-secondary);
  font-weight: 500;
  padding: 10px 20px;
  background: var(--bg-glass);
  border-radius: 20px;
  border: 1px solid var(--border-color);
}

/* Refresh Info */
.refresh-info {
  text-align: center;
  margin-top: 30px;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 15px;
  background: var(--bg-glass);
  border-radius: 15px;
  border: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.refresh-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--accent-gradient);
  opacity: 0.5;
}

/* Loading Animation */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-color);
  border-radius: 50%;
  border-top-color: var(--accent-primary);
  animation: spin 1s ease-in-out infinite;
}

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

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    margin: 20px 40px;
    padding: 20px;
  }
  
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  .stats-container {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
  }
  
  .stat-card {
    padding: 20px;
  }
  
  .stat-value {
    font-size: 2rem;
  }
  
  .requests-table {
    font-size: 14px;
  }
  
  .requests-table th,
  .requests-table td {
    padding: 10px;
  }
  
  .pagination-container {
    flex-wrap: wrap;
    gap: 10px;
  }
}

/* Performance Optimizations */
.stat-card,
.chart-container,
.requests-container {
  will-change: transform;
}

/* Reduce motion for users who prefer it */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}