.preview-check {
  position: absolute;
  top: 6px;
  right: 6px;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border: 1px solid #43f397;
  border-radius: 50%;
  background: #071812ef;
  color: #43f397;
  font-weight: 900;
  box-shadow: 0 0 14px #43f39766;
}

.thumb-fallback {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 7px;
  width: 100%;
  aspect-ratio: 1;
  background: radial-gradient(circle, #0b2b20 0, #07080d 68%);
  color: #43f397;
  text-align: center;
}

.thumb-fallback b {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid #43f397;
  border-radius: 50%;
  font-size: 24px;
  box-shadow: 0 0 22px #43f39755;
}

.thumb-fallback span {
  font-size: 8px;
  letter-spacing: .12em;
}