.cover {
  background-color: #f1f7fc;
  background-image: url('../chapter-01/assets/lesson01-question-sketches.png');
  background-repeat: no-repeat;
  background-size: auto 100%;
  background-position: left center;
  border: 1px solid #d5e8f9;
}
.cover-placeholder { display: none; }
.lesson-row:focus-visible { border-radius: 7px; }
.lesson-row:hover { background: #f8faff; }
.mobile-scrim[hidden] { display: none; }