Template:InfoBox/styles.css

.infobox {
  border: 1px solid #36c;
  background-color: #eaf3ff;
  padding: 1em;
  margin: 1em 0;
  border-left: 5px solid #36c;
  border-radius: 4px;
  font-size: 95%;
  display: flex;
  align-items: flex-start;
}

.infobox-icon {
  width: 24px;
  height: 24px;
  margin-right: 0.8em;
  flex-shrink: 0;
}

.infobox-text {
  flex-grow: 1;
}