* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-family: 'Kanit', sans-serif;
  background-color: #f9f9f9;
  color: #333;
}

.hero-section {
  background-image: url('images/main.jpg');
  background-size: cover;
  background-position: center;
  height: 100vh;
  position: relative;
  color: white;
}

.overlay {
  background: rgba(0, 0, 0, 0.6); /* ทำให้เนื้อหาอ่านง่ายบนรูป */
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 30px;
  text-align: center;
}

nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  background: #1a252f;
  margin: 0;
  padding: 0;
  position: sticky;
  top: 0;
}

nav ul li {
  margin: 0 15px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  padding: 15px;
  display: block;
}

nav ul li a:hover {
  background: #34495e;
}

section {
  max-width: 960px;
  margin: 40px auto;
  padding: 0 20px;
}

.projects {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.project {
  flex: 1 1 45%;
  background: white;
  border-radius: 8px;
  padding: 10px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  text-align: center;
}

.project img {
  width: 100%;
  border-radius: 5px;
}

footer {
  text-align: center;
  padding: 15px;
  background: #eee;
}