body {
  margin: 0;
  font-family: Arial;
  background: #0b0f1a;
  color: white;
}

/* HEADER */
.header {
  display: flex;
  justify-content: space-between;
  padding: 20px;
  background: #0d1323;
  position: relative;
}

.logo {
  color: #00aaff;
  font-weight: bold;
  font-size: 20px;
}

/* NAV */
.nav {
  display: flex;
}

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

/* HAMBURGER */
.menu-toggle {
  display: none;
  font-size: 28px;
  cursor: pointer;
}

/* HERO */
.hero {
  text-align: center;
  padding: 120px 20px;
  background: url('https://source.unsplash.com/1600x900/?technology,ai') center/cover;
}

.hero h1 {
  font-size: 40px;
}

.hero button {
  margin-top: 20px;
  padding: 10px 20px;
  background: #00aaff;
  border: none;
  cursor: pointer;
}

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

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

.card {
  background: #111a2e;
  padding: 20px;
  width: 280px;
  border-radius: 10px;
}

.card img {
  width: 100%;
  border-radius: 10px;
}

/* FORM */
form {
  display: flex;
  flex-direction: column;
  width: 300px;
  margin: auto;
}

input, textarea {
  margin: 10px 0;
  padding: 10px;
}

/* FOOTER */
footer {
  text-align: center;
  padding: 20px;
  background: #0d1323;
}

/* MOBILE */
@media (max-width: 768px) {
  .nav {
    display: none;
    flex-direction: column;
    background: #0d1323;
    position: absolute;
    top: 60px;
    right: 0;
    width: 200px;
    padding: 20px;
  }

  .nav.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }
}