body {
  background-color: #121212;
  color: #e0e0e0;
  font-family: 'Segoe UI', sans-serif;
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

header {
  background-color: #1f1f1f;
  padding: 40px 20px;
  text-align: center;
}

header h1 {
  color: #00ff99;
  font-size: 3em;
  margin-bottom: 10px;
}

header p {
  font-size: 1.2em;
  color: #ccc;
}

section {
  padding: 30px 20px;
  max-width: 900px;
  margin: auto;
}

section h2 {
  color: #00e676;
  border-bottom: 1px solid #333;
  padding-bottom: 5px;
}

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

ul li {
  background: #1e1e1e;
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 8px;
}

img {
  max-width: 100%;
  margin-top: 10px;
  border-radius: 10px;
  box-shadow: 0 0 10px #0f0;
}

a {
  color: #00ffd5;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.btn {
  display: inline-block;
  background-color: #00ff99;
  color: #000;
  padding: 12px 20px;
  margin-top: 10px;
  border-radius: 8px;
  font-weight: bold;
}

.btn:hover {
  background-color: #00e676;
}

footer {
  background-color: #1f1f1f;
  text-align: center;
  padding: 20px;
  color: #777;
}