:root {
  --primary-bg: #222222;
  /* Dark gray background */
  --secondary-bg: #333333;
  /* Slightly lighter gray for container */
  --button-color: #007BFF;
  /* Blue for button */
  --button-hover: #0056b3;
  /* Darker blue on hover */
  --text-color: #fff;
  /* White text */
  --subtext-color: #ccc;
  /* Lighter gray for subtext */
}

body {
  font-family: Arial, sans-serif;
  background-color: var(--primary-bg);
  color: var(--text-color);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  text-align: center;
  overflow: hidden;
  /* Prevents scrolling */
  transition: background-color 0.3s ease;
  /* Smooth transition */
}

.container {
  background-color: var(--secondary-bg);
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  max-width: 600px;
  width: 100%;
  transition: transform 0.3s ease;
  /* Smooth hover effect */
}

h1 {
  font-size: 36px;
  margin-bottom: 20px;
  color: var(--text-color);
}

p {
  font-size: 18px;
  color: var(--subtext-color);
  margin-bottom: 30px;
}

.btn {
  background-color: var(--button-color);
  color: var(--text-color);
  padding: 12px 24px;
  text-decoration: none;
  border-radius: 6px;
  font-size: 16px;
  display: inline-block;
  transition: background-color 0.3s ease, transform 0.2s ease;
}

.btn:hover {
  background-color: var(--button-hover);
  transform: scale(1.05);
  /* Slight zoom effect */
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.5);
  /* Add focus ring for accessibility */
}

/* Responsive Layout: Mobile-friendly design */
@media (max-width: 768px) {
  .container {
    padding: 20px;
  }
  h1 {
    font-size: 28px;
  }
  p {
    font-size: 16px;
  }
}

/* Add smooth scroll on the page for user-friendly navigation */
html {
  scroll-behavior: smooth;
}