@media (max-width: 768px) {

  header {
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 16px 12px;
  }

  nav {
    margin-left: 0;
    width: 100%;
    justify-content: center;
    flex-wrap: wrap;
  }

  .grid {
    width: 100%;
    margin: 10px auto 40px;
    padding: 0 12px;
    grid-template-columns: 1fr;
  }

  .card {
    width: 100%;
    margin: 0 auto;
  }

  .brand {
    font-size: 26px;
    text-align: center;
  }

  .bottom {
    gap: 20px;
    font-size: 22px;
  }

  iframe.embed {
    width: 100%;
  }
}
.youtube-icon {
  width: 70px;
  height: 70px;
  opacity: 0.9;
  transition: 0.2s ease;
}

.youtube-icon:hover {
  transform: scale(1.7);
  filter: drop-shadow(0 0 6px #A8B4FF);
  opacity: 1;
}
.bottom-icons {
  position: relative;     
  left: auto;
  bottom: auto;
  transform: none;

  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;

  margin: 28px auto 24px; 
  z-index: 1;
}