body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #121212;
  color: #eee;
  line-height: 1.6;
  margin: 0;
  padding: 2rem;
}

header {
  margin-bottom: 2rem;
  text-align: center;
}

h1 {
  font-size: 2.2rem;
  color: #00ff9d;
}

h2 {
  margin-top: 2rem;
  color: #00c3ff;
}

p, li {
  color: #ccc;
}

code, pre {
  background: #1f1f1f;
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  color: #00ff9d;
  font-family: monospace;
}

pre {
  display: block;
  padding: 1rem;
  overflow-x: auto;
  margin: 1rem 0;
}

.nav {
  margin-bottom: 1.5rem;
  text-align: center;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin: 0.2rem;
  background: #00c3ff;
  color: #fff;
  text-decoration: none;
  border-radius: 6px;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.btn:hover {
  background: #0099cc;
}

footer {
  margin-top: 3rem;
  text-align: center;
  color: #777;
}

.terminal {
  background: #000;
  color: #0f0;
  font-family: monospace;
  padding: 1rem;
  border-radius: 8px;
  margin-top: 1rem;
  min-height: 200px;
  white-space: pre-wrap;
  overflow-y: auto;
  box-shadow: 0 0 15px rgba(0, 255, 157, 0.2);
}