body {
  font-family: Arial, sans-serif;
  background-color: #f9f9f9;
  color: #333;
  margin: 0;
  padding: 0;
}

header {
  background-color: #ffffff;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
  padding: 15px 20px;
  text-align: center;
}

nav a {
  margin: 0 10px;
  text-decoration: none;
  color: #007ACC;
  font-weight: bold;
}

main {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
}

h1, h2, h3 {
  color: #222;
}

.hero img, .project img, .grid img {
  width: 100%;
  border-radius: 10px;
  margin-top: 15px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
}

footer {
  text-align: center;
  background-color: #ffffff;
  padding: 20px;
  margin-top: 40px;
  font-size: 0.9em;
  color: #666;
}