* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial;
}

body {
  line-height: 1.6;
}

/* NAVBAR */
.navbar {
  display: flex;
  justify-content: space-between;
  padding: 15px 10%;
  background: rgba(0,0,0,0.7);
  color: white;
  position: fixed;
  width: 100%;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li a {
  color: white;
  margin-left: 20px;
  text-decoration: none;
}

/* HERO */
.hero {
  height: 100vh;
  background: url('https://images.unsplash.com/photo-1501785888041-af3ef285b470') center/cover;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
}

.hero-content {
  background: rgba(0,0,0,0.5);
  padding: 30px;
  border-radius: 10px;
}

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

/* SECTIONS */
section {
  padding: 60px 10%;
  text-align: center;
}

.cards {
  display: flex;
  gap: 20px;
  margin-top: 20px;
}

.card {
  flex: 1;
  padding: 40px;
  background: #f4f4f4;
  border-radius: 10px;
  transition: 0.3s;
  opacity: 0;
  transform: translateY(40px);
}

.card.show {
  opacity: 1;
  transform: translateY(0);
}

.card:hover {
  background: orange;
  color: white;
}

/* CONTACT */
form {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

input, textarea {
  padding: 10px;
  width: 100%;
}

button {
  padding: 10px;
  background: orange;
  border: none;
  color: white;
}

/* RESPONSIVE */
@media(max-width: 768px) {
  .cards {
    flex-direction: column;
  }

  .nav-links {
    display: none;
  }
}