* {
  box-sizing: border-box;
}

body {
  font-family: Roboto, Arial, sans-serif;
  margin: 0;
  background: #F0F0F0;
  color: #222;
}

header {
  background: #181818;
  border-bottom: 1px solid #ddd;
  padding: 15px 30px;
}

nav {
  display: flex;
  justify-content: center;
  gap: 30px;
  background: #181818;
}

nav a {
  color: #F0F0F0;
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
    text-decoration: underline;
}

nav a.active {
  padding: 24px 8px;
  border-radius: 4px;
}

main {
  max-width: 1100px;
  margin: auto;
  padding: 25px;
}

.hero {
  text-align: center;
  padding: 40px 20px;
}

.hero h2 {
  margin-top: 0;
}

.card {
  background: white;
  border-radius: 10px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,.08);
}

footer {
  text-align: center;
  padding: 30px;
  color: #666;
}