HTMLify

* {
  padding: 0;
  box-sizing: border-box;
  font-family: "sans";
}

@font-face {
  font-family: "sans";
  src: url(font/sans.ttf);
}

body {
  overflow: hidden;
  background: #19172e;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}

footer, a {
  color: #fff;
}

h1 {
  color: #fff;
  text-align: center;
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  padding-top: 10px;
}

.wrapper{
  width: 40%;
  max-width: 120rem;
  margin: 0 auto;
}

.blue {
  text-align: center;
  font-size: 2rem;
}

#balloon-gallery{
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

#balloon-gallery div{
  height: 90px;
  width: 90px;
  font-size: 40px;
  border-radius: 100%;
  margin: 2.5px 5 px 2.5px 0px;
}

#balloon-gallery div:nth-child(1n){
  background: #4285F4;
  color: #4285F4;
}

#balloon-gallery div:nth-child(2n){
  background:#DB4437;
  color:#DB4437;
}

#balloon-gallery div:nth-child(3n){
  background:#F4B400;
  color:#F4B400;
}

#balloon-gallery div:nth-child(4n){
  background:#0F9D58;
  color:#0F9D58;
}

#yay-no-balloons {
  display: none;
  color: #4285F4;
  font-size:100px;
}

footer {
  text-align: center;
  position: absolute;
  bottom: 0;
}

@media screen and (max-width: 768px) {
  #balloon-gallery div{
    width: 50px;
    height: 50px;
  }
  #yay-no-balloons{
    font-size: 30px;
  }
}