/* CSS Custom Properties */
:root {
  --primary-color: #6366f1;
  --primary-dark: #4f46e5;
  --secondary-color: #f59e0b;
  --background-color: #0f172a;
  --surface-color: #1e293b;
  --text-color: #f8fafc;
  --text-muted: #cbd5e1;
  --border-color: #334155;
  --shadow-color: rgba(0, 0, 0, 0.3);
  --border-radius: 0.75rem;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
}

/* Base styles */
body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--background-color) 0%, #1e1b4b 100%);
  color: var(--text-color);
  line-height: 1.6;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--spacing-md);
}

/* Header styles */
header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: var(--surface-color);
  border-radius: var(--border-radius);
  box-shadow: 0 4px 6px var(--shadow-color);
  border: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  max-width: 600px;
  width: 100%;
}

header h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 4px var(--shadow-color);
  margin-bottom: var(--spacing-sm);
}

header img {
  border-radius: 50%;
  box-shadow: 0 4px 8px var(--shadow-color);
  transition: transform 0.3s ease;
}

header img:hover {
  transform: scale(1.1) rotate(5deg);
}

/* Main section styles */
main {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  max-width: 800px;
  width: 100%;
}

/* Game link styles */
main a {
  display: block;
  padding: var(--spacing-lg);
  background: var(--surface-color);
  color: var(--text-color);
  text-decoration: none;
  border-radius: var(--border-radius);
  border: 2px solid var(--border-color);
  font-size: 1.125rem;
  font-weight: 600;
  text-align: center;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

main a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transition: left 0.5s ease;
}

main a:hover {
  transform: translateY(-4px);
  border-color: var(--primary-color);
  box-shadow: 0 8px 25px var(--shadow-color);
  background: linear-gradient(135deg, var(--surface-color) 0%, #2d3748 100%);
}

main a:hover::before {
  left: 100%;
}

main a:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

main a:active {
  transform: translateY(-2px);
}

/* Game-specific colors */
main a:nth-child(1) {
  border-left: 4px solid #ef4444;
}

main a:nth-child(2) {
  border-left: 4px solid #10b981;
}

main a:nth-child(3) {
  border-left: 4px solid #f59e0b;
}

main a:nth-child(4) {
  border-left: 4px solid #8b5cf6;
}

/* Responsive design */
@media (max-width: 768px) {
  body {
    padding: var(--spacing-sm);
  }
  
  header {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
  }
  
  main {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  
  main a {
    padding: var(--spacing-md);
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  header img {
    width: 80px;
  }
  
  main a {
    padding: var(--spacing-sm) var(--spacing-md);
  }
}

/* Animation for page load */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

header {
  animation: fadeInUp 0.6s ease-out;
}

main a {
  animation: fadeInUp 0.6s ease-out;
  animation-fill-mode: both;
}

main a:nth-child(1) { animation-delay: 0.1s; }
main a:nth-child(2) { animation-delay: 0.2s; }
main a:nth-child(3) { animation-delay: 0.3s; }
main a:nth-child(4) { animation-delay: 0.4s; }