body {
  font-family: 'Helvetica Neue', sans-serif;
  margin: 0;
  background: #fff;
  color: #222;
}
.hero {
  position: relative;
  background: url('../assets/images/robotic-bg.jpg') center/cover no-repeat;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
}
.hero .overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.6);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}
.hero-content h1 span {
  color: #00bcd4;
}
.btn {
  padding: 0.75rem 1.5rem;
  background: #00bcd4;
  color: white;
  border: none;
  text-decoration: none;
  border-radius: 5px;
  margin-top: 1rem;
  display: inline-block;
}
section {
  padding: 4rem 2rem;
  max-width: 1000px;
  margin: 0 auto;
}
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}
.project-card {
  border: 1px solid #ccc;
  padding: 1rem;
  border-radius: 8px;
  background: #f9f9f9;
}
footer {
  text-align: center;
  padding: 2rem;
  background: #222;
  color: white;
}