:root {
  --main-color: #0F4C81;
  --accent-color: #FFD700;
  --soft-white: #F5F5DC;
  --neon-cyan: #00FF7F;
  --dark-gray: #2C3E50;
  --light-gray: #ECF0F1;
}

body {
  margin: 0;
  font-family: 'Roboto', sans-serif;
  color: var(--dark-gray);
  background: linear-gradient(135deg, var(--main-color), var(--soft-white));
  line-height: 1.6;
}

header {
  background: var(--accent-color);
  color: var(--dark-gray);
  padding: 20px;
  text-align: center;
  font-family: 'Bodoni', serif;
  font-size: 2rem;
}

.grid-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 20px;
  padding: 20px;
}

.left-section {
  background: var(--soft-white);
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.right-section {
  background: var(--main-color);
  color: white;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.parallax {
  height: 400px;
  background-image: url('https://images.gptkong.com/demo/sample1.png');
  background-attachment: fixed;
  background-position: center;
  background-repeat: no-repeat;
  background-size: cover;
  position: relative;
}

.button {
  position: relative;
  background: var(--accent-color);
  color: white;
  padding: 10px 20px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  border-radius: 5px;
  font-size: 1rem;
}

.button:hover {
  transform: scale(1.1);
  box-shadow: 0 0 10px var(--neon-cyan);
}

.image-retro {
  filter: sepia(50%) contrast(1.2) brightness(0.9);
  width: 100%;
  height: auto;
  border-radius: 10px;
}

@media (max-width: 768px) {
  .grid-container {
    grid-template-columns: 1fr;
  }
}

article {
  background: var(--soft-white);
  padding: 20px;
  margin: 20px;
  border-radius: 10px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

pre {
  background: var(--dark-gray);
  color: var(--neon-cyan);
  padding: 15px;
  border-radius: 5px;
  overflow-x: auto;
  font-size: 0.9rem;
}

h2, h3 {
  color: var(--accent-color);
  font-family: 'Bodoni', serif;
}

p {
  margin-bottom: 15px;
}

footer {
  background: var(--main-color);
  color: white;
  text-align: center;
  padding: 10px;
  font-size: 0.9rem;
}