:root {
  --gap-size: 50px;
  --nav-height: 60px;
}

/* Ocultar menú por defecto */
.bottom-nav {
  display: none;
}

/* Mostrar menú en pantallas móviles */
@media (max-width: 768px) {
  .bottom-nav {
    display: flex;
    position: fixed;
    left: 0;
    width: 100%;
    background-color: #0c0c0c;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.5);
    z-index: 999;

    bottom: var(--gap-size);
    height: var(--nav-height);
  }

  .bottom-nav::after {
    content: "";
    position: absolute;
    bottom: calc(-1 * var(--gap-size));
    left: 0;
    width: 100%;
    height: var(--gap-size);
    background-color: inherit;
  }

  body {
    padding-bottom: calc(var(--nav-height) + var(--gap-size));
  }

  .nav-item {
    flex: 1;
    text-align: center;
    text-decoration: none;
    color: #ffffff;
    font-size: 0.9rem;
    font-weight: 600;
    padding: 5px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
  }

  .nav-item:hover {
    background-color: #000000;
    box-shadow: 0 -1px 5px rgba(255, 255, 255, 0.3);
  }

  .icon {
    width: 23px;
    height: 23px;
    margin-bottom: 5px;
    transition: opacity 0.3s ease;
  }

  .nav-item:hover .icon {
    opacity: 0.8;
  }

  .nav-item span {
    font-size: 0.9rem;
    font-weight: 700;
  }

  .nav-item.active {
    background-color: #1e90ff;
    color: #ffffff;
  }

  .nav-item.active .icon {
    filter: brightness(1.5);
  }
}