body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: url('ethak2.jpg') no-repeat center center fixed;
  background-size: cover;
  color: #f0f0f0;
}

header {
  text-align: center;
  padding: 2rem;
  background-color: rgba(0, 0, 0, 0.6);
  border-bottom: 2px solid #00ffcc;
}

header h1 {
  color: #00ffcc;
  font-size: 3rem;
}

header h2 {
  color: #ffffff;
  font-size: 2rem;
  margin-top: 0.5rem;
}

header .intro {
  font-size: 1.2rem;
  color: #ccc;
  margin-top: 1rem;
}

main {
  padding: 2rem;
  background-color: rgba(0, 0, 0, 0.7);
}

.tools-section h3 {
  color: #00ffcc;
  font-size: 2rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid #00ffcc;
  padding-bottom: 0.5rem;
}

.category {
  margin-bottom: 2rem;
  padding: 1rem;
  background-color: rgba(20, 20, 20, 0.8);
  border-left: 5px solid #00ffcc;
}

.category h4 {
  color: #ffd700;
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.category ul {
  list-style-type: none;
  padding-left: 0;
}

.category li {
  margin-bottom: 1rem;
  background-color: rgba(40, 40, 40, 0.8);
  padding: 1rem;
  border-radius: 8px;
}

.category strong {
  color: #00ffff;
  font-size: 1.2rem;
}

pre {
  background-color: #111;
  padding: 1rem;
  border-radius: 5px;
  color: #00ff00;
  overflow-x: auto;
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

footer {
  text-align: center;
  padding: 1rem;
  background-color: rgba(0, 0, 0, 0.8);
  color: #999;
  border-top: 1px solid #00ffcc;
}

@media screen and (max-width: 768px) {
  header h1, header h2 {
    font-size: 1.8rem;
  }
  .tools-section h3 {
    font-size: 1.5rem;
  }
  .category h4 {
    font-size: 1.2rem;
  }
}