img.img-fluid {
}

.nav-tile {
  position: relative;
  display: inline-block;
}

/* Locked state (not logged in) */
.nav-tile.locked {
  pointer-events: none; /* no clicks, no navigation */
  -webkit-filter: grayscale(80%);
  filter: grayscale(80%);
  opacity: 0.4;
  cursor: not-allowed;
}

/* Optional overlay text, no extra HTML needed */
.nav-tile.locked::after {
  content: "Faça login para acessar";
  position: absolute;
  inset: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.35);
  color: #fff;
  font-size: 0.9rem;
  text-align: center;
  padding: 0.5rem;
}

.img-btn {
  display: inline-block;
  position: relative;
}

.img-btn.is-locked {
  cursor: not-allowed;
}

.img-btn.is-locked img {
  -webkit-filter: grayscale(1) contrast(0.75);
  filter: grayscale(1) contrast(0.75);
  opacity: 0.55;
  -webkit-transition:
    opacity 0.15s,
    -webkit-filter 0.15s;
  transition:
    opacity 0.15s,
    -webkit-filter 0.15s;
  transition:
    filter 0.15s,
    opacity 0.15s;
  transition:
    filter 0.15s,
    opacity 0.15s,
    -webkit-filter 0.15s;
}

.img-btn.is-locked:hover img {
  opacity: 0.45;
}

/* Tooltip */
.img-btn.is-locked::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  white-space: nowrap;

  padding: 6px 10px;
  border-radius: 8px;
  font-size: 12px;
  line-height: 1.2;

  background: rgba(0, 0, 0, 0.85);
  color: #fff;

  opacity: 0;
  pointer-events: none;
  -webkit-transition:
    opacity 0.12s,
    -webkit-transform 0.12s;
  transition:
    opacity 0.12s,
    -webkit-transform 0.12s;
  transition:
    opacity 0.12s,
    transform 0.12s;
  transition:
    opacity 0.12s,
    transform 0.12s,
    -webkit-transform 0.12s;
  -webkit-transform: translateX(-50%) translateY(4px);
  transform: translateX(-50%) translateY(4px);
  z-index: 50;
}

.img-btn.is-locked:hover::after {
  opacity: 1;
  -webkit-transform: translateX(-50%) translateY(0);
  transform: translateX(-50%) translateY(0);
}

/* Small arrow */
.img-btn.is-locked::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: calc(100% + 2px);
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: rgba(0, 0, 0, 0.85);

  opacity: 0;
  pointer-events: none;
  -webkit-transition: opacity 0.12s;
  transition: opacity 0.12s;
  z-index: 50;
}

.img-btn.is-locked:hover::before {
  opacity: 1;
}