body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f6f9;
  color: #222;
}
header {
  background: #2c3e50;
  color: #fff;
  padding: 20px;
  text-align: center;
}
header nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 6px;
}
main {
  max-width: 700px;
  margin: 20px auto;
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
label, select, button {
  display: block;
  width: 100%;
  margin: 10px 0;
  font-size: 16px;
}
select, button {
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 6px;
}
button {
  background: #2c3e50;
  color: #fff;
  cursor: pointer;
}
button:hover {
  background: #1a242f;
}
h2 {
  color: #2c3e50;
}
ul {
  list-style-type: none;
  padding: 0;
}
ul li {
  background: #f9f9f9;
  margin: 8px 0;
  padding: 10px;
  border-radius: 6px;
}
ul li a {
  color: #2c3e50;
  text-decoration: none;
  font-size: 14px;
  margin-left: 8px;
}
ul li a:hover {
  text-decoration: underline;
}
/* Ad section hidden */
.ad {
  display: none;
}
footer {
  text-align: center;
  padding: 15px;
  font-size: 12px;
  color: #555;
}
@media (max-width: 600px) {
  main { margin: 10px; padding: 15px; }
  label, select, button { font-size: 14px; }
}