body {
  margin: 0;
  font-family: 'Segoe UI', sans-serif;
  background-color: #0f0f0f;
  color: #fff;
}

header {
  background-color: #1a1a1a;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2.5rem;
  color: #00ff99;
}

nav {
  background-color: #121212;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  padding: 10px 0;
}

nav a {
  color: #ccc;
  text-decoration: none;
  margin: 10px 15px;
  font-weight: bold;
  transition: color 0.2s;
}

nav a:hover {
  color: #00ff99;
}

main {
  padding: 40px 20px;
  max-width: 1000px;
  margin: auto;
}

.section {
  margin-bottom: 40px;
}

.section h2 {
  color: #00ff99;
  border-bottom: 2px solid #00ff99;
  padding-bottom: 10px;
}

footer {
  background-color: #1a1a1a;
  color: #777;
  text-align: center;
  padding: 20px;
  font-size: 0.9rem;
}

form {
  background-color: #1c1c1c;
  padding: 20px;
  border-radius: 8px;
  max-width: 400px;
  margin-top: 20px;
}

input, button {
  width: 100%;
  padding: 10px;
  margin-top: 5px;
  background-color: #2b2b2b;
  color: #fff;
  border: none;
  border-radius: 5px;
}

button {
  background-color: #00ff99;
  color: #000;
  font-weight: bold;
  cursor: pointer;
}

button:hover {
  background-color: #00cc7a;
}

@media (max-width: 600px) {
  nav {
    flex-direction: column;
    align-items: center;
  }
}