body {
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #001e48;
  background: linear-gradient(135deg, #001e48 0%, #175059 50%, #823311 100%);
  min-height: 100vh;
  line-height: 1.6;
}

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  background: #175059;
  box-shadow: 0 6px 0 #001e48, 0 12px 0 #823311;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-left {
  flex: 1;
}

.header-center {
  flex: 1;
  text-align: center;
}

.header-right {
  flex: 1;
  display: flex;
  justify-content: flex-end;
}

.back-btn, .nav-link {
  color: #faeac3;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s ease;
}

.back-btn:hover, .nav-link:hover {
  color: #ed8824;
}

.game-title {
  font-family: 'Luckiest Guy', Arial Black, Arial, sans-serif;
  font-size: 1.8rem;
  color: #eb7317;
  letter-spacing: 2px;
  text-shadow: 2px 2px 0 #001e48;
  margin: 0;
}

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 40px 20px;
}

.content-card {
  background: rgba(255, 255, 255, 0.95);
  border-radius: 16px;
  padding: 40px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
  border: 3px solid #faeac3;
}

.content-card h1 {
  font-family: 'Luckiest Guy', Arial Black, Arial, sans-serif;
  font-size: 2.5rem;
  color: #001e48;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: 1px;
  text-shadow: 1px 1px 0 #faeac3;
}

.intro {
  font-size: 1.2rem;
  color: #175059;
  text-align: center;
  margin-bottom: 40px;
  font-weight: 500;
}

.guide-section {
  margin-bottom: 32px;
  padding: 24px;
  background: #f8f9fa;
  border-radius: 12px;
  border-left: 4px solid #ed8824;
}

.guide-section h2 {
  font-family: 'Luckiest Guy', Arial Black, Arial, sans-serif;
  font-size: 1.5rem;
  color: #001e48;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.guide-section ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.guide-section li {
  background: white;
  margin: 12px 0;
  padding: 16px;
  border-radius: 8px;
  border-left: 3px solid #175059;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.guide-section li:hover {
  transform: translateX(4px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.guide-section li strong {
  color: #ed8824;
  font-weight: 600;
}

.action-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 2px solid #eee;
}

.btn {
  padding: 14px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 0.5px;
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn.primary {
  background: #ed8824;
  color: white;
  box-shadow: 0 4px 0 #823311;
}

.btn.primary:hover {
  background: #eb7317;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #823311;
}

.btn.secondary {
  background: #175059;
  color: white;
  box-shadow: 0 4px 0 #001e48;
}

.btn.secondary:hover {
  background: #1a5762;
  transform: translateY(-2px);
  box-shadow: 0 6px 0 #001e48;
}

/* Responsive design */
@media (max-width: 768px) {
  .header {
    padding: 16px 20px;
    flex-direction: column;
    gap: 12px;
  }
  
  .header-left,
  .header-center,
  .header-right {
    flex: none;
  }
  
  .game-title {
    font-size: 1.5rem;
  }
  
  .container {
    padding: 20px 15px;
  }
  
  .content-card {
    padding: 30px 25px;
  }
  
  .content-card h1 {
    font-size: 2rem;
  }
  
  .guide-section {
    padding: 20px;
  }
  
  .action-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .btn {
    width: 200px;
  }
}