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

body {
  background: black;
  color: white;
}

/* NAVBAR */
.navbar {
  position: fixed;
  width: 100%;
  top: 0;
  padding: 20px 40px;
  display: flex;
  justify-content: space-between;
  background: rgba(0,0,0,0.6);
  z-index: 100;
}

.logo {
  font-weight: bold;
  font-size: 22px;
  letter-spacing: 2px;
}

nav a {
  color: white;
  text-decoration: none;
  margin-left: 25px;
  font-size: 14px;
}

/* HERO */
.hero {
  height: 100vh;
   background: url('https://th.bing.com/th/id/R.5dbd29c9a243bc62056eb67f75d817c1?rik=QbPrY9KvELBo%2bg&pid=ImgRaw&r=0') center/cover no-repeat;
  display: flex;
  align-items: center;
  padding-left: 60px;
}

.hero-content h1 {
  font-size: 48px;
  letter-spacing: 3px;
}

.hero-content p {
  margin: 20px 0;
  font-size: 18px;
}

.btn {
  border: 2px solid white;
  padding: 12px 30px;
  color: white;
  text-decoration: none;
  font-weight: bold;
}

/* SECTIONS */
.section {
  padding: 100px 60px;
  text-align: center;
}

.section.dark {
  background: #111;
}

.cards {
  display: flex;
  justify-content: center;
  gap: 30px;
  margin-top: 40px;
}

.card {
  background: #1a1a1a;
  padding: 30px;
  width: 220px;
  border: 1px solid #333;
}

/* FOOTER */
footer {
  padding: 40px;
  text-align: center;
  background: #000;
  font-size: 12px;
}

/* ===== RESPONSIVE ===== */
.menu-toggle {
  display: none;
  font-size: 26px;
  background: none;
  border: none;
  color: white;
  cursor: pointer;
}

/* Tablet y móvil */
@media (max-width: 900px) {

  .navbar {
    padding: 15px 20px;
  }

  nav {
    position: absolute;
    top: 60px;
    right: 0;
    background: rgba(0,0,0,0.95);
    display: none;
    flex-direction: column;
    width: 200px;
    padding: 20px;
  }

  nav a {
    margin: 10px 0;
  }

  nav.active {
    display: flex;
  }

  .menu-toggle {
    display: block;
  }

  .hero {
    padding: 0 20px;
    text-align: center;
    justify-content: center;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .section {
    padding: 70px 20px;
  }

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

  video {
    width: 100%;
    height: auto;
  }
}