/* Loaded after site.css. This dedicated layer keeps its mobile defaults from
   overriding the teaching components; selectors are limited to optional markup. */
@layer lessonVisuals {
  .lesson-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(190px, .62fr);
    align-items: start;
    gap: 24px;
  }
  .lesson-intro-grid > div { min-width: 0; }
  .lesson-intro-description {
    font-size: 18px;
    color: var(--muted);
    line-height: 1.85;
    overflow-wrap: anywhere;
  }
  .lesson-cover {
    width: 100%;
    max-width: 280px;
    justify-self: end;
    margin: 4px 0 0;
    border: 1px solid var(--line);
    border-radius: 16px;
    overflow: hidden;
    background: var(--paper);
  }
  .lesson-cover img { aspect-ratio: 3 / 2; width: 100%; object-fit: cover; }
  .lesson-learning-goal {
    margin-top: 22px;
    padding-left: 16px;
    border-left: 4px solid var(--yellow);
  }
  .lesson-learning-goal > strong { display: block; color: var(--blue); font-size: 15px; }
  .lesson-learning-goal p { margin-top: 5px; font-size: 18px; line-height: 1.85; }

  .lesson-diagram {
    margin: 30px 0 6px;
    padding: 25px;
    border: 1px solid #d5e1f4;
    border-radius: 16px;
    background: #f6f9ff;
  }
  .lesson-diagram figcaption > strong { display: block; color: var(--navy); font-size: 21px; line-height: 1.65; }
  .lesson-panel .lesson-diagram figcaption p { font-size: 17px; color: #53647e; line-height: 1.85; margin: 9px 0 23px; }
  .diagram-items { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 23px; padding: 0; list-style: none; }
  .diagram-item { position: relative; min-width: 0; border: 1px solid #d3dff0; border-top: 4px solid var(--blue); border-radius: 11px; padding: 18px 16px; background: white; }
  .diagram-item-title { display: block; color: var(--navy); font-size: 19px; line-height: 1.65; font-weight: 700; overflow-wrap: anywhere; }
  .lesson-panel .diagram-item p { font-size: 17px; line-height: 1.85; margin: 10px 0 0; }
  .diagram-example { border-top: 1px solid var(--line); margin-top: 16px; padding-top: 12px; color: #53647e; font-size: 15px; line-height: 1.85; overflow-wrap: anywhere; }
  .diagram-example > span { display: block; font-weight: 600; color: var(--blue); font-size: 13px; margin-bottom: 4px; }
  .diagram-arrow { position: absolute; right: -24px; top: 30px; width: 23px; text-align: center; color: var(--blue); font-size: 21px; line-height: 1; }
  .diagram-levels .diagram-item:nth-child(2) { border-top-color: #6585c9; }
  .diagram-levels .diagram-item:last-child { border-top-color: var(--yellow); }
  .diagram-ipo .diagram-item:nth-child(2) { background: #eef4ff; }
  .diagram-context .diagram-item { border-top-color: #7d98cc; }
  .diagram-modes .diagram-item:last-child { border-top-color: var(--yellow); }

  .lesson-screenshot { margin: 28px 0 6px; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: white; }
  .screenshot-link { display: block; padding: 10px; background: var(--paper); }
  .screenshot-link:focus-visible { outline-offset: -4px; }
  .lesson-screenshot img { width: auto; max-width: 100%; height: auto; margin-inline: auto; border-radius: 7px; }
  .lesson-screenshot figcaption { padding: 19px 21px; border-top: 1px solid var(--line); }
  .lesson-panel .lesson-screenshot figcaption p { font-size: 17px; margin: 0 0 10px; line-height: 1.85; }
  .lesson-screenshot figcaption > div { display: flex; flex-wrap: wrap; gap: 5px 15px; font-size: 13px; color: var(--muted); }
  .lesson-screenshot figcaption a { color: var(--blue); text-decoration: underline; overflow-wrap: anywhere; }
  .lesson-screenshot figcaption small { display: block; font-size: 13px; line-height: 1.8; margin-top: 10px; color: var(--muted); }

  .lesson-image-examples > li { padding-left: 5px; padding-bottom: 28px; }
  .lesson-image-examples > li + li { padding-top: 26px; border-top: 1px solid var(--line); }
  .lesson-image-examples > li::marker { color: var(--blue); font-weight: 700; }
  .lesson-image-example { margin: 0 0 22px; }
  .image-example-link { display: block; width: 100%; max-width: 560px; margin-inline: auto; border: 1px solid var(--line); border-radius: 14px; overflow: hidden; background: var(--paper); }
  .lesson-image-example img { display: block; width: 100%; height: auto; object-fit: contain; }
  .lesson-image-example figcaption { padding-top: 5px; }
  .lesson-image-example figcaption small { display: block; color: var(--muted); font-size: 13px; line-height: 1.8; }
  .image-example-note { padding: 17px 20px; border-left: 3px solid var(--yellow); border-radius: 0 10px 10px 0; background: #fffcf0; }
  .image-check-title { margin: 20px 0 10px; color: var(--navy); font-size: 17px; line-height: 1.8; }
  .image-example-checks { font-size: 17px; line-height: 1.85; }
  .image-example-checks li::marker { color: var(--blue); }

  .lesson-walkthrough { margin-top: 35px; padding-top: 7px; border-top: 1px solid var(--line); }
  .lesson-panel .lesson-walkthrough > h3 { font-size: 23px; line-height: 1.65; margin: 23px 0; }
  .walkthrough-steps { padding-left: 32px; margin: 0; }
  .walkthrough-steps > li { padding-left: 9px; margin-bottom: 25px; }
  .walkthrough-steps > li::marker { color: var(--blue); font-size: 19px; font-weight: 700; }
  .walkthrough-steps h4 { margin: 0 0 7px; font-size: 19px; font-weight: 700; line-height: 1.75; color: var(--navy); }
  .lesson-panel .walkthrough-steps p { font-size: 18px; line-height: 1.95; margin: 0; }
  .walkthrough-expected { padding: 19px 21px; background: #f3f7ff; border-radius: 11px; border-left: 3px solid var(--blue); }
  .walkthrough-expected > strong { display: block; color: var(--blue); font-size: 16px; margin-bottom: 8px; }
  .lesson-panel .walkthrough-expected p { font-size: 17px; margin: 0; }
  .walkthrough-check-title { font-size: 18px; color: var(--navy); line-height: 1.75; margin: 24px 0 12px; }
  .walkthrough-checks { padding-left: 24px; }
  .walkthrough-checks li { font-size: 17px; line-height: 1.9; padding-left: 3px; margin-bottom: 9px; }
  .walkthrough-checks li::marker { color: var(--blue); }

  .common-mistake { margin-top: 26px; padding: 19px 23px; border-left: 4px solid var(--yellow); border-radius: 0 12px 12px 0; background: #fffcf0; }
  .lesson-panel .common-mistake h3 { font-size: 19px; margin: 0 0 13px; }
  .lesson-panel .common-mistake p { font-size: 17px; line-height: 1.9; margin: 0 0 12px; }
  .lesson-panel .common-mistake p:last-child { margin-bottom: 0; }
  .common-mistake strong { color: var(--navy); }
  .lesson-takeaways { margin: 0; }
  .lesson-takeaways ul, .completion-criteria ul { padding-left: 25px; }
  .lesson-takeaways li { font-size: 18px; line-height: 1.9; margin-bottom: 13px; padding-left: 4px; }
  .lesson-takeaways li::marker, .completion-criteria li::marker { color: var(--blue); }
  .completion-criteria { margin: 0 0 26px; padding-top: 2px; }
  .completion-criteria h3 { color: var(--navy); font-size: 18px; line-height: 1.75; margin: 0 0 12px; }
  .completion-criteria li { font-size: 17px; line-height: 1.9; padding-left: 3px; margin-bottom: 10px; }
  .application-checks { padding-left: 25px; }
  .application-checks li { font-size: 18px; line-height: 1.9; margin-bottom: 12px; padding-left: 4px; }
  .application-checks li::marker { color: var(--blue); }
}

@layer lessonVisuals {
  @media (max-width: 1100px) {
    .lesson-intro-grid { grid-template-columns: minmax(0, 1fr) 205px; gap: 20px; }
    .diagram-items { grid-template-columns: 1fr; gap: 27px; }
    .diagram-arrow { right: auto; left: calc(50% - 12px); top: auto; bottom: -25px; transform: rotate(90deg); }
  }
  @media (max-width: 760px) {
    .lesson-intro-grid { grid-template-columns: minmax(0, 1fr); gap: 22px; }
    .lesson-cover { max-width: 300px; justify-self: start; margin-top: 0; }
    .lesson-diagram { padding: 20px 17px; }
    .diagram-item { padding: 18px; }
    .lesson-screenshot figcaption { padding: 17px; }
    .lesson-image-examples > li { padding-left: 0; }
    .image-example-note { padding: 15px 17px; }
    .lesson-learning-goal p, .lesson-intro-description { font-size: 18px; }
    .common-mistake { padding: 18px; }
    .walkthrough-steps { padding-left: 25px; }
    .walkthrough-steps > li { padding-left: 6px; }
  }
}

/* The full lesson budget includes one exercise and its final review. */
.lesson-time-plan{margin:20px 0;padding:20px;border:1px solid #d9e4f7;background:#f3f7ff;border-radius:14px}
.lesson-time-plan>strong{color:#183c80}.lesson-time-plan ol{list-style:none!important;padding:0!important;margin:12px 0!important;display:grid;gap:8px}
.lesson-time-plan li{display:flex;justify-content:space-between;gap:14px;margin:0!important}.lesson-time-plan b{white-space:nowrap;color:#183c80}.lesson-time-plan small{display:block;color:#53647e;line-height:1.7}
.catalog-detail{max-width:780px;line-height:1.9;color:#526583;font-size:14px}
.lesson-resources{margin:24px 0;padding:16px 20px;background:#fffbeb;border:1px solid #f5e7a6;border-radius:14px}.lesson-resources h2{margin-top:0!important}.lesson-resources ul{list-style:none!important;padding:0!important;display:grid;gap:10px}.lesson-resources a{display:inline-block;min-height:44px;padding:8px 0;line-height:1.7;font-weight:600}.lesson-resources p{font-size:14px}