.hero {
  height: 100vh;
  background: url('https://images.unsplash.com/photo-1507146153580-69a1fe6d8aa1?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1200&q=80') no-repeat center center;
  background-size: cover;
  background-attachment: fixed;
}
.hero::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 255, 0.6);
  z-index: -1;
}

.navbar-brand {
  font-weight: 700;
}

.card {
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-10px);
}

footer {
  font-size: 0.9rem;
}
  .custom-navbar {
    background-color: #e9ecef;
    border-bottom: 1px solid #ddd;
  }
  .custom-navbar .navbar-brand,
  .custom-navbar .nav-link {
    color: #212529;
  }
  .custom-navbar .nav-link:hover {
    color: #007bff;
  }
    .navbar-light .navbar-brand,
  .navbar-light .nav-link {
    color: #212529; /* Negro suave, muy legible */
  }
  .navbar-light .nav-link:hover {
    color: #007bff; /* Azul al pasar el mouse */
  }