* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Arial', sans-serif;
}

body {
  background: #0b0b0b;
  color: white;
}

/* HEADER */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 30px;
  background: black;
  position: sticky;
  top: 0;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  width: 50px;
  margin-right: 10px;
}

.logo h1 {
  color: gold;
  font-size: 18px;
}

nav a {
  color: white;
  margin: 0 10px;
  text-decoration: none;
  transition: 0.3s;
}

nav a:hover {
  color: gold;
}

/* HERO */
.hero {
  height: 90vh;
  background: url('https://images.unsplash.com/photo-1509042239860-f550ce710b93') no-repeat center/cover;
  display: flex;
  justify-content: center;
  align-items: center;
}

.overlay {
  text-align: center;
  background: rgba(0,0,0,0.6);
  padding: 40px;
}

.hero h2 {
  font-size: 40px;
  color: gold;
}

.btn {
  display: inline-block;
  margin-top: 20px;
  padding: 12px 25px;
  background: gold;
  color: black;
  text-decoration: none;
}

/* SECTIONS */
section {
  padding: 60px 20px;
  text-align: center;
}

/* CARDS */
.cards {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
}

.card {
  background: #111;
  padding: 20px;
  margin: 10px;
  width: 250px;
  border: 1px solid gold;
}

.card h3 {
  color: gold;
}

/* WHATSAPP */
.whatsapp {
  display: inline-block;
  margin-top: 20px;
  padding: 10px 20px;
  background: #25D366;
  color: white;
  text-decoration: none;
}

/* FOOTER */
footer {
  background: black;
  padding: 20px;
}