body {
  scroll-behavior: smooth;
}

.whatsapp-float {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 9999;
    background-color: #25d366;
    padding: 10px;
    border-radius: 50%;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
    transition: transform 0.2s ease-in-out;
  }

  .whatsapp-float:hover {
    transform: scale(1.1);
  }

  .whatsapp-float img {
    display: block;
  }

.hero {
  height: 100vh;
  background: url('https://source.unsplash.com/1600x900/?technology') center/cover no-repeat;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
}

.navbar .nav-link {
  transition: color 0.3s ease;
}

.navbar .nav-link:hover {
  color: #0d6efd;
}