Template:InfoBox/styles.css

/* Container */
.info-box {
  background-color: #e6f2fa;
  border: 1px solid #9ccbf7;
  border-radius: 4px;
  padding: 0.5em 1em;
  margin: 1em 0;
  display: flex;
  align-items: flex-start;
}
/* Icon */
.info-box .infobox-icon {
  margin-right: 0.5em;
  flex: 0 0 auto;
}
/* Content */
.info-box .content {
  flex: 1 1 auto;
}