First-Website/resources/styles/gallery.css

#headsUp {
  visibility: hidden;
  transition: height .3s;
  background-color: #454752;
  box-shadow: 0 1px 6px 1px hsla(0, 0%, 0%, 0.4);
  z-index: 3;
  margin-top: 55px;
  position: relative;
}
.welcome {
  position: absolute;
  bottom: 4.5rem;
  padding-left: 2.5%;
}
.removeOptions {
  width: 100%;
  position: absolute;
  bottom: 1rem;
  padding-left: 2.5%;
}
.hideHeadsUp {
  height: 3rem;

}
.removeHeadsUp {
  cursor: pointer;
  display: inline-block;
  margin-left: 1rem;
  border-bottom: white 3px dotted;
}
* {
  box-sizing: border-box;
}
body {
  background-color: #212126!important;
}
.rowImg button {
  border: 0;
  padding: 0;
  margin-top: 8px!important;
}
.gallery {
  margin-top: calc(3rem + 55px);
  text-align: center;
  font-size: 2vw;
}
.rowImg {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  padding: 0 4px;
  margin-top: 3rem;
}
.columnImg {
  flex: 33%;
  max-width: 33%;
  padding: 0 4px;
}
.columnImg img {
  width: 100%;
}
@media screen and (min-width:500px) and (max-width:1000px) {
  .columnImg {
    flex: 50%;
    max-width: 50%;
  }
  .gallery {
    font-size: 3vw;
  }
}
@media screen and (min-width:0px) and (max-width:500px) {
  .columnImg {
    flex: 100%;
    max-width: 100%;
  }
  .gallery {
    font-size: 5vw;
  }
}