body { margin: 0; font-family: Arial, sans-serif; background-color: #f4f4f4; color: #222; }

header { background-color: #000; padding: 20px 0; color: #fff; }

header .container { width: 90%; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }

nav ul { list-style: none; margin: 0; padding: 0; display: flex; }

nav ul li { margin-left: 20px; }

nav ul li a { color: #fff; text-decoration: none; font-weight: bold; }

.hero { background-color: #ff6600; color: #fff; padding: 80px 0; text-align: center; }

.btn { display: inline-block; padding: 10px 20px; background: #000; color: #fff; text-decoration: none; margin-top: 15px; }

.services, .projects, .contact { padding: 50px 0; text-align: center; }

.service-grid, .project-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; width: 90%; margin: 0 auto; }

.service-box, .project-box { background: #fff; padding: 20px; border-radius: 5px; box-shadow: 0 0 10px rgba(0,0,0,0.1); }

.placeholder-img { background: #ccc; height: 150px; margin-bottom: 15px; }

/* contact form */
.contact-form { max-width: 600px; margin: 0 auto; display: flex; flex-direction: column; }

.contact-form input,
.contact-form textarea {
  padding: 12px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
}

.contact-form button {
  background-color: #ff6600;
  color: white;
  padding: 12px 20px;
  border: none;
  cursor: pointer;
  font-size: 18px;
}

.contact-form button:hover {
  background-color: #e65c00;
}

/* mobile */
@media (max-width: 768px) {
  header .container { flex-direction: column; }
  nav ul { flex-direction: column; }
  .service-grid, .project-grid { grid-template-columns: 1fr; }
  .hero { padding: 40px 20px; }
}