/* General Styles */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #1a1a1a;
  color: #f0f0f0;
}

a {
  color: #f0f0f0;
  text-decoration: none;
}

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

/* Header */
header {
  background-color: #e63946;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
  font-size: 2em;
}

nav ul {
  margin-top: 10px;
}

nav ul li {
  display: inline-block;
  margin: 0 15px;
}

nav ul li a.active,
nav ul li a:hover {
  text-decoration: underline;
}

/* Main Content */
main {
  padding: 20px;
}

.intro, .features, .call-to-action {
  margin-bottom: 40px;
}

.intro h2 {
  font-size: 1.8em;
  color: #e63946;
}

.download-button {
  display: inline-block;
  padding: 10px 20px;
  background-color: #457b9d;
  color: #f0f0f0;
  border-radius: 5px;
  margin-top: 20px;
}

.download-button:hover {
  background-color: #1d3557;
}

.features h3 {
  font-size: 1.5em;
  color: #e63946;
}

.features ul li {
  margin: 10px 0;
}

/* Footer */
footer {
  background-color: #333333;
  text-align: center;
  padding: 15px;
}

/* Responsive Design */
@media (max-width: 600px) {
  header h1, .intro h2, .features h3 {
    font-size: 1.5em;
  }

  nav ul li {
    display: block;
    margin: 10px 0;
  }

  .download-button {
    width: 100%;
    text-align: center;
  }
}