header {
  position: float;
  top: 0;
  align-items: center;
  justify-content: center;
  display: flex;
  height: 10%;
  width: 100%;
  opacity: 1;
  transition: opacity 1s linear;
}

footer {
  position: fixed;
  align-items: center;
  justify-content: center;
  display: flex;
  bottom: 0;
  height: 10%;
  width: 100%;
  opacity: 1;
  transition: opacity 1s linear;
}

.txt-align-l {
  text-align: left;
}

.container {
  display: flex;
}

.container .col {
  flex: 1;
}

.txt-align-r {
  text-align: right;
}

.background-1990 {
  text-shadow: 0.03em 0.03em 3px #3CB9FC,
               0.04em 0.04em 3px #B537F2,
               0.05em 0.05em 3px #8A2BE2,
               0.06em 0.06em 3px #120052,
               0.085em 0.085em 0 #f72119;
}

.color-yellow-400 {
    color: #FBBF24;
}

.color-yellow-500 {
    color: #F59E0B;
}

small.tiny {
  font-size: 1rem;
}

.width-100 {
  width: 100%;
}