#trace-gallery {
  margin-bottom: 10px;
}
.trace-photo {
  position: relative;
  display: inline-block;
  border-radius: 6px;
  overflow: hidden;
}
.trace-photo img {
  width: 90px;
  height: 90px;
  object-fit: cover;
  border: 1px solid #ddd;
  border-radius: 6px;
}
.trace-photo button {
  position: absolute;
  top: 3px;
  right: 3px;
  background: rgba(0,0,0,0.6);
  color: #fff;
  border: none;
  border-radius: 50%;
  width: 20px;
  height: 20px;
  line-height: 16px;
  font-size: 14px;
  cursor: pointer;
}
.trace-photo button:hover {
  background: #d33;
}