style.css

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  background-color: rgb(65, 67, 73);
  color: white;
}

html, 
body {
  height: 100%;
  font-family: monospace;
  padding: 10px;
  font-size: 25px;
}

.hidden { 
  display: none;
}

.output {
  width: 100%;
  min-height: 400px;
}

.stdout, .stderr, .social {
  font-size: 15px;
  width: 100%;
  margin-bottom: 10px;
}

.social {
  margin-bottom: 5px;
}

.stderr {
  color: #659cef;
}

.flex-container {
  height: 100%;
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.grid-container {
  display: grid;
  align-items: center;
  justify-content: center;
  grid-auto-rows: auto;
  align-items: start;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
/*  grid-auto-rows: fit-content(1em);*/
  grid-gap: 10px;
  width: 40%;
}

.progress-bar {
  width: 100%;
}
      
.progress-bar-background {
  width: 100%;
  background-color: #666666;
  padding: 3px;
  border-radius: 3px;
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, .2);
}
      
.progress-bar-fill {
  display: block;
  height: 22px;
  background-color: #659cef;
  border-radius: 3px;
  font-size: 15px;
  line-height: 22px;
  padding-left: 5px;
  transition: width 500ms ease-in-out;
  white-space: nowrap;
}