:root {
  --primary-color: #4567b7;
  --secondary-color: #8c54f2;
  --accent-color: #ff9800;
  --background-gradient: linear-gradient(135deg, #1e3c72, #2a5298);
  --text-color: #ffffff;
  --content-bg: rgba(255, 255, 255, 0.1);
}

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

body {
  font-family: 'Helvetica', sans-serif;
  background: var(--background-gradient);
  color: var(--text-color);
  line-height: 1.6;
  padding: 20px;
}

h1, h2, h3 {
  font-family: 'Roboto', sans-serif;
  font-weight: bold;
  color: var(--accent-color);
}

header {
  text-align: center;
  padding: 40px 20px;
  background: rgba(0, 0, 0, 0.2);
  margin-bottom: 20px;
}

header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

section {
  background: var(--content-bg);
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  position: relative;
}

section img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 10px auto;
}

code, pre {
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  padding: 10px;
  border-radius: 5px;
  font-family: 'Courier New', monospace;
}

pre {
  overflow-x: auto;
  white-space: pre-wrap;
}

button {
  background-color: var(--accent-color);
  color: white;
  border: none;
  padding: 10px 20px;
  cursor: pointer;
  border-radius: 5px;
  transition: transform 0.3s ease-in-out;
}

button:hover {
  transform: scale(1.1);
}

.parallax-container {
  perspective: 1px;
  height: 100vh;
  overflow-x: hidden;
  overflow-y: auto;
  position: relative;
}

.parallax-background {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 200%;
  transform: translateZ(-1px) scale(2);
  background: url('https://images.gptkong.com/demo/sample1.png') no-repeat center center/cover;
  z-index: -1;
}

.parallax-foreground {
  position: relative;
  z-index: 1;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  section {
    padding: 15px;
  }
  button {
    padding: 8px 16px;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: 1.8rem;
  }
  section {
    padding: 10px;
  }
}