:root {
  --main-color-dark-blue: #001f3f;
  --main-color-olive-green: #5c6e4d;
  --accent-color-golden: #d4af37;
  --highlight-color-neon-green: #39ff14;
  --background-gradient-start: #002b36;
  --background-gradient-end: #004e64;
  --shadow-color: rgba(0, 0, 0, 0.2);
  --card-border-radius: 10px;
  --transition-speed: 0.3s;
}

body {
  font-family: 'Roboto', sans-serif;
  background: linear-gradient(to bottom, var(--background-gradient-start), var(--background-gradient-end));
  color: white;
  margin: 0;
  padding: 0;
  line-height: 1.6;
  overflow-x: hidden;
}

header {
  text-align: center;
  padding: 50px 20px;
  background: linear-gradient(to right, var(--main-color-dark-blue), var(--main-color-olive-green));
  box-shadow: 0 4px 6px var(--shadow-color);
}

header h1 {
  font-family: 'Bodoni Bold', serif;
  font-size: 3rem;
  margin: 0;
  color: var(--accent-color-golden);
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

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

.card {
  background: rgba(0, 0, 0, 0.6);
  border: 1px solid var(--accent-color-golden);
  border-radius: var(--card-border-radius);
  padding: 20px;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
  position: relative;
  overflow: hidden;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: 0 8px 16px var(--shadow-color);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(255, 255, 255, 0.1) 10px,
    rgba(255, 255, 255, 0.1) 20px
  );
  opacity: 0.2;
  z-index: -1;
}

.card img {
  max-width: 100%;
  height: auto;
  border-radius: var(--card-border-radius);
  margin-bottom: 15px;
}

.card h2 {
  font-family: 'Bodoni Bold', serif;
  color: var(--highlight-color-neon-green);
  font-size: 1.8rem;
  margin-top: 0;
}

.card p {
  color: #cfd8dc;
  font-size: 1rem;
  margin-bottom: 15px;
}

button {
  background-color: var(--accent-color-golden);
  border: none;
  padding: 10px 20px;
  font-size: 1rem;
  color: var(--main-color-dark-blue);
  cursor: pointer;
  border-radius: 5px;
  transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

button:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.3);
}

pre {
  background: rgba(0, 0, 0, 0.8);
  color: var(--highlight-color-neon-green);
  padding: 15px;
  border-radius: var(--card-border-radius);
  overflow-x: auto;
  font-size: 0.9rem;
}

code {
  color: var(--highlight-color-neon-green);
  font-family: 'Courier New', Courier, monospace;
}

@media (max-width: 768px) {
  header h1 {
    font-size: 2rem;
  }

  .container {
    grid-template-columns: 1fr;
  }

  .card {
    padding: 15px;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.card {
  animation: fadeIn var(--transition-speed) ease forwards;
}