.ux-home { padding-top: 20px; }
.ux-home-heading { display: flex; justify-content: space-between; align-items: center; gap: 16px; margin-bottom: 18px; }
.ux-home-heading p { margin: 5px 0 0; font-size: .85rem; color: var(--muted); }
.ux-text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--blue); font-size: .85rem; text-decoration: underline; text-underline-offset: 3px; }
.ux-text-link .ui-icon { width: 15px; flex-shrink: 0; }
.ux-hero { display: grid; grid-template-columns: minmax(0, 1fr) 190px; gap: 24px; align-items: center; padding: 30px; background: var(--blue-soft); }
.ux-hero h1 { font-size: clamp(28px, 4vw, 42px); line-height: 1.08; margin: 10px 0 14px; }
.ux-hero-copy > p { font-size: .95rem; line-height: 1.55; max-width: 630px; margin-bottom: 18px; color: var(--muted); }
.ux-lesson-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.ux-action-hint { display: block; margin-top: 12px; font-size: .75rem; line-height: 1.5; color: var(--muted); max-width: 480px; }
.ux-mascot img { display: block; width: 100%; height: 200px; object-fit: contain; }
.ux-shortcuts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 16px 0 28px; }
.ux-shortcut { display: flex; align-items: center; gap: 14px; padding: 18px; }
.ux-shortcut > .ui-icon { width: 22px; height: 22px; flex-shrink: 0; color: var(--blue); }
.ux-shortcut > .ui-icon:last-child { margin-left: auto; width: 16px; }
.ux-shortcut strong, .ux-shortcut small { display: block; }
.ux-shortcut small { margin-top: 5px; font-size: .8rem; color: var(--muted); }
.ux-shortcut:hover { background: var(--blue-soft); }
.ux-course-heading { margin-bottom: 14px; }
.ux-course-heading h2 { font-size: 26px; }
.ux-home .course-blocks { gap: 12px; }
.ux-course-block { border: 1px solid var(--line); border-radius: 4px; }
.ux-course-block + .ux-course-block { padding-top: 0; }
.ux-course-block > summary { display: flex; align-items: center; gap: 14px; padding: 18px; cursor: pointer; list-style: none; }
.ux-course-block > summary::-webkit-details-marker { display: none; }
.ux-course-block > summary::after { content: '+'; color: var(--blue); font-size: 22px; }
.ux-course-block[open] > summary::after { content: '−'; }
.ux-block-level { font-size: .85rem; font-weight: 700; color: var(--blue); }
.ux-block-copy { flex: 1; min-width: 0; }
.ux-block-copy strong, .ux-block-copy small { display: block; }
.ux-block-copy small { font-size: .78rem; color: var(--muted); margin-top: 4px; }
.ux-block-count { font-size: .8rem; color: var(--muted); }
.ux-block-body { padding: 0 16px 16px; }
.ux-block-body .block-tool-button { width: auto; margin: 0 0 4px; }
.ux-block-body .lesson-row { grid-template-columns: 30px minmax(0, 1fr) auto; gap: 10px; }
.vocabulary-interlude > summary { cursor: pointer; line-height: 1.45; }
.vocabulary-interlude > summary small { color: var(--muted); margin-left: 8px; font-size: .75rem; }
.vocabulary-interlude[open] > summary { margin-bottom: 12px; }
.vocabulary-interlude-head { margin-bottom: 12px; }
.lesson-rule-button { display: flex; margin: 0 auto 14px; min-height: 36px; font-size: .85rem; }
.lesson-reference-dialog { width: min(800px, calc(100% - 28px)); max-height: calc(100dvh - 32px); overflow: auto; padding: 24px; border: 1px solid var(--line); border-radius: 4px; color: var(--ink); background: var(--surface); }
.lesson-reference-dialog::backdrop { background: rgba(0,0,0,.65); }
.lesson-reference-dialog .support-heading { margin-bottom: 20px; }
.lesson-reference-dialog .support-heading h2 { font-size: 25px; }
.lesson-reference-dialog .button { white-space: normal; }
.ux-progress-plan { margin-top: 26px; }
.ux-progress-plan > summary { cursor: pointer; font-weight: 600; color: var(--blue); }
.ux-progress-plan .course-roadmap { margin-top: 14px; }
@media (max-width: 600px) {
  .ux-home-heading { align-items: flex-start; }
  .ux-home-heading .ux-text-link { font-size: .75rem; max-width: 105px; }
  .ux-hero { position: relative; display: block; padding: 20px; }
  .ux-mascot { position: absolute; right: 12px; top: 12px; width: 62px; height: 72px; }
  .ux-mascot img { height: 72px; }
  .ux-hero-copy > .eyebrow { padding-right: 65px; min-height: 38px; display: flex; align-items: center; }
  .ux-hero h1 { font-size: 30px; }
  .ux-shortcuts { grid-template-columns: 1fr; gap: 10px; }
  .ux-shortcut { padding: 14px; }
  .ux-course-block > summary { padding: 14px; gap: 10px; }
  .ux-block-body { padding: 0 8px 10px; }
  .ux-block-body .lesson-row { padding: 12px 8px; grid-template-columns: 24px minmax(0,1fr) auto; gap: 8px; }
  .ux-block-body .lesson-row .tag { font-size: 10px; padding: 0 5px; }
  .lesson-reference-dialog { padding: 18px; }
  .lesson-reference-dialog .support-heading { flex-direction: column; }
}
.name-error { display: block; color: var(--red); line-height: 1.5; margin-top: 6px; }
.name-error:empty { display: none; }
[aria-invalid="true"] { border-color: var(--red); }
#profile-name-hint, #onboarding-name-hint { display: block; color: var(--muted); line-height: 1.5; }

/* Preserve the visual scale while making each route's heading hierarchy explicit. */
.page-heading .page-title { max-width: none; font-size: clamp(25px, 4vw, 38px); line-height: 1.03; letter-spacing: -0.05em; margin-bottom: 12px; }
.about-section-title, .practice-rubric-title { font-size: 17px; line-height: normal; letter-spacing: normal; margin: 0 0 8px; }
.privacy-card .about-section-title { margin: 7px 0 5px; font-size: 23px; }
.about-subsection-title { margin: 1.33em 0; font-size: 1em; }
.privacy-card .about-subsection-title { margin: 22px 0 5px; font-size: 14px; }
.material-card .material-title { margin: 13px 0 6px; font-size: 20px; line-height: normal; letter-spacing: normal; }
.prelesson-card .prelesson-note-title { margin: 7px 0 4px; font-size: 25px; line-height: normal; letter-spacing: normal; }
.theory-section .theory-section-title { margin: 0 0 14px; font-size: 1.05rem; line-height: 1.4; letter-spacing: normal; }
.theory-topic-copy { letter-spacing: normal; }

.checkpoint-section > .section-head .button { flex-shrink: 0; white-space: nowrap; }
@media (max-width: 600px) {
  .checkpoint-section > .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
}