* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', 'Segoe UI', sans-serif;
  color: #fff;
  background-color: black;
}

.overlay {
  background-color: rgba(0, 0, 0, 0.6);
  min-height: 100vh;
}

#bgVideoDesktop,
#bgVideoMobile {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
  z-index: -2;
  pointer-events: none;
}

#bgVideoMobile {
  display: none;
}

.navbar {
  background-color: rgba(0, 0, 0, 0.8);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.9);
}

.navbar-brand {
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-link {
  color: white !important;
  font-size: 1rem;
}

.navbar-collapse {
  transition: all 0.4s ease-in-out;
}

@media (max-width: 767.98px) {
  #bgVideoDesktop {
    display: none;
  }
  #bgVideoMobile {
    display: block;
  }

  .navbar-collapse {
    background-color: rgba(0, 0, 0, 0.9);
    padding: 1rem;
  }

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

.section {
  padding: 3rem 0;
}

.card {
  background: rgba(255, 255, 255, 0.15);
  border: none;
  text-align: center;
  padding: 1.5rem;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.btn {
  background: #00bcd4;
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 5px;
  font-weight: bold;
}

.btn:hover {
  background: #0097a7;
}

.response-message {
  background: #222;
  padding: 1rem;
  border-radius: 5px;
  color: #0f0;
  text-align: center;
}

.footer {
  background-color: rgba(0, 0, 0, 0.9);
  padding: 2rem 0;
  font-size: 0.9rem;
  color: #ccc;
}