body {
  margin: 0;
  font-family: Arial;
  background: #fafafa;
  scroll-behavior: smooth;
}

/* HEADER */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 50px;
  background: white;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

nav a {
  margin: 0 10px;
  text-decoration: none;
  color: black;
}

/* HERO */
.hero {
  text-align: center;
  padding: 80px 20px;
}

.hero button {
  padding: 10px 20px;
  border: none;
  background: black;
  color: white;
  cursor: pointer;
  margin-top: 10px;
}

/* PROJECTS */
.projects {
  text-align: center;
  padding: 60px 20px;
}

.cards {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

.card {
  background: white;
  width: 220px;
  padding: 20px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: 0.3s;
}

.card:hover {
  transform: translateY(-8px);
}

.open {
  margin-top: 10px;
  padding: 8px 15px;
  border: none;
  background: #333;
  color: white;
  cursor: pointer;
}

/* CONTACT */
.contact {
  text-align: center;
  padding: 60px 20px;
}

.contact input,
.contact textarea {
  display: block;
  width: 300px;
  margin: 10px auto;
  padding: 10px;
}

.contact button {
  padding: 10px 20px;
  border: none;
  background: black;
  color: white;
  cursor: pointer;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    gap: 10px;
  }

  .cards {
    flex-direction: column;
    align-items: center;
  }
}