/* ==========================================================================
   player.css: page agent P2. The lesson player's frame (top bar with the
   course progress line, curriculum sidebar / bottom sheet, reading column,
   bottom bar, end-of-lesson card, focus mode), the inline gate, the course
   page, the final quiz frame, the 3D scene box and the kits' fit inside the
   new frame. Loaded on every /academy page after app.css; what lesson
   content looks like (sections, primer, quiz) is in academy.css.

   1 Player frame  2 Curriculum  3 Lesson column  4 Bottom bar and end card
   5 Gate  6 3D scene box  7 Kits in the frame  8 Course page  9 Final quiz
   ========================================================================== */

/* 1 Player frame ------------------------------------------------------------- */
html:has(body.ax--player) { --pbar-h: 48px; --pbar-bottom: 56px; --header-h: calc(var(--pbar-h) + 3px); scroll-padding-top: calc(var(--pbar-h) + 19px); scroll-padding-bottom: calc(var(--pbar-bottom) + 24px + env(safe-area-inset-bottom)); }
@media (min-width: 768px) { html:has(body.ax--player) { --pbar-h: 56px; --pbar-bottom: 64px; } }
.ax--player .toast-region { bottom: calc(var(--pbar-bottom) + 12px + env(safe-area-inset-bottom)); }
.player { min-height: 100vh; }
.pbar { position: sticky; top: 0; z-index: 40; background: var(--surface); transition: transform var(--t-sheet) var(--ease); }
.pbar.is-hidden { transform: translateY(-100%); }
.pbar__in { display: flex; align-items: center; gap: var(--sp-2); height: var(--pbar-h); padding-inline: 4px var(--sp-2); }
@media (min-width: 768px) { .pbar__in { padding-inline: var(--sp-3); gap: var(--sp-3); } }
.pbar__back { flex: none; }
.pbar__mark { display: inline-grid; place-items: center; width: var(--tap); height: var(--tap); flex: none; border-radius: var(--r-control); }
.pbar__mark:hover { background: var(--surface-3); }
.pbar__title { flex: 1; min-width: 0; display: flex; align-items: baseline; gap: var(--sp-3); }
.pbar__title { align-items: center; }
.pbar__course { display: block; min-height: var(--tap); line-height: var(--tap); min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; color: var(--ink); text-decoration: none; font-size: .9375rem; }
.pbar__course:hover { text-decoration: underline; text-underline-offset: 3px; }
.pbar__count { flex: none; font-size: var(--fs-meta); color: var(--ink-3); white-space: nowrap; }
.pbar__end { display: flex; align-items: center; gap: 2px; flex: none; }
.pbar__lessons { min-height: var(--tap); gap: 6px; }
.pbar__me { display: inline-grid; place-items: center; width: var(--tap); height: var(--tap); border-radius: 50%; text-decoration: none; }
.pbar__me:hover .ax-avatar { background: #333; }
.pbar__focus-off { display: none; }
.pbar__progress .progress { display: block; min-width: 0; }
.pbar__progress { border-bottom: 1px solid var(--line); }
.player__body { display: grid; grid-template-columns: minmax(0, 1fr); }

/* 2 Curriculum: sidebar >= 1024px, bottom sheet below ---------------------------- */
.ptoc { display: none; }
@media (min-width: 1024px) {
  .player__body { grid-template-columns: 300px minmax(0, 1fr); }
  .ptoc { display: block; position: sticky; top: calc(var(--pbar-h) + 4px); align-self: start; height: calc(100vh - var(--pbar-h) - 4px - var(--pbar-bottom)); overflow-y: auto; overscroll-behavior: contain; border-right: 1px solid var(--line); padding: var(--sp-5) var(--sp-3) var(--sp-6); scrollbar-width: thin; }
  .player.is-toc-closed .player__body, .player.is-focus .player__body { grid-template-columns: minmax(0, 1fr); }
  .player.is-toc-closed .ptoc, .player.is-focus .ptoc { display: none; }
}
.ptoc__head { display: grid; gap: 2px; padding: 0 var(--sp-3) var(--sp-3); }
.ptoc__course { font-weight: 600; line-height: 1.35; }
.ptoc__course a { text-decoration: none; }
.ptoc__course a:hover { text-decoration: underline; text-underline-offset: 3px; }
.ptoc__list { display: grid; gap: 2px; }
.ptoc__group { padding: var(--sp-4) var(--sp-3) var(--sp-1); font-size: var(--fs-eyebrow); line-height: var(--lh-eyebrow); font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-3); }
.ptoc__list a { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: 10px; align-items: start; min-height: var(--tap); padding: 9px 12px 9px 9px; border-radius: var(--r-control); border-left: 3px solid transparent; color: var(--ink-2); text-decoration: none; font-size: var(--fs-meta); line-height: var(--lh-meta); }
.ptoc__list a:hover { background: var(--surface-2); color: var(--ink); }
.ptoc__list a[aria-current="page"] { background: var(--surface-3); color: var(--ink); border-left-color: var(--accent); }
.ptoc__list a[aria-current="page"] .ptoc__title { font-weight: 600; }
.ptoc__list a:focus-visible { outline: 2px solid var(--accent-strong); outline-offset: -2px; }
.ptoc__state { display: grid; place-items: center; height: 20px; }
.ptoc__state .ax-icon { width: 18px; height: 18px; color: var(--ink-3); }
.ptoc__list .is-done .ptoc__state .ax-icon, .ptoc__list .is-current .ptoc__state .ax-icon { color: var(--accent); }
.ptoc__text { display: grid; gap: 1px; min-width: 0; }
.ptoc__title { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.ptoc__meta { font-size: var(--fs-meta); color: var(--ink-3); }
.ptoc__extra:first-of-type, .ptoc__list > li.ptoc__extra { margin-top: 0; }
.ptoc__list > li:not(.ptoc__extra) + .ptoc__extra { margin-top: var(--sp-2); padding-top: var(--sp-2); border-top: 1px solid var(--line); }
.player-sheet .sheet__panel { padding-inline: var(--sp-3); }
.player-sheet .sheet__head { padding-inline: var(--sp-3); align-items: flex-start; }
.player-sheet .ptoc__list a { font-size: .9375rem; }
@media (min-width: 1024px) { .player-sheet { display: none !important; } }

/* Focus mode: only the close button, the focus toggle and the progress line stay. */
.player.is-focus .pbar__title, .player.is-focus [data-player-toc], .player.is-focus .pbar__mark, .player.is-focus .pbar__me, .player.is-focus .pbar__end > .btn--ghost { visibility: hidden; }
.player.is-focus .pbar__focus-on { display: none; }
.player.is-focus .pbar__focus-off { display: inline-block; }

/* 3 Lesson column -------------------------------------------------------------- */
.player__main { min-width: 0; padding: var(--sp-5) var(--gutter) calc(var(--sp-8) + var(--pbar-bottom)); }
@media (min-width: 1024px) { .player__main { padding-top: var(--sp-7); } }
.player__head, .player__main .lesson-main { max-width: var(--measure); margin-inline: auto; }
.player__head { display: grid; gap: var(--sp-3); margin-bottom: var(--sp-6); }
.player__head .ax-lead { max-width: none; }
.player__facts { display: flex; flex-wrap: wrap; gap: 0; }
.player__facts:empty { display: none; }
.player__facts > span + span::before { content: "·"; margin-inline: 8px; }
@media (max-width: 599px) { .player__facts .player__checked { flex-basis: 100%; } .player__facts .player__checked::before { content: none; } }
.player-sheet:focus, .player-sheet:focus-visible { outline: none; }
.player__head .lesson-depth { margin-top: var(--sp-2); }
/* 3D scenes and lesson pictures may run wider than the text on big screens. */
@media (min-width: 1280px) { .player__main .lesson-main > .scn-wrap { margin-inline: -80px; } }
@media (min-width: 1024px) and (max-width: 1279px) { .player.is-toc-closed .lesson-main > .scn-wrap, .player.is-focus .lesson-main > .scn-wrap { margin-inline: -80px; } }

/* 4 Bottom bar and the end-of-lesson card ------------------------------------------ */
.player__bar { position: fixed; z-index: 35; left: 0; right: 0; bottom: 0; background: var(--surface); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom); }
.player__bar-in { display: flex; align-items: center; gap: var(--sp-2); height: var(--pbar-bottom); padding-inline: var(--sp-2) var(--gutter); }
/* From tablets up the bar's row sits on the reading column: Previous on its left edge, Mark
   complete in the middle, Next on its right edge (and right of the sidebar on desktop). */
@media (min-width: 768px) { .player__bar-in { justify-content: space-between; gap: var(--sp-3); max-width: calc(var(--measure) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); } .player__prev { margin-inline-start: -12px; } }
@media (min-width: 1024px) { .player__bar { padding-left: 300px; } .player.is-toc-closed .player__bar, .player.is-focus .player__bar { padding-left: 0; } }
.player__prev { flex: none; min-width: var(--tap); padding-inline: 10px; }
.player__complete[aria-pressed="true"], .lesson-end__complete [aria-pressed="true"] { opacity: 1; color: var(--ink-2); }
.player__complete[aria-pressed="true"] .ax-icon, .lesson-end__complete [aria-pressed="true"] .ax-icon { color: var(--accent); }
.player__complete:disabled, .lesson-end__complete .btn:disabled { opacity: 1; pointer-events: none; }
.player__where { flex: none; }
.player__next { flex: 1; min-width: 0; }
.player__next > span { overflow: hidden; text-overflow: ellipsis; }
@media (min-width: 768px) { .player__next { flex: 0 1 auto; } .player__prev { padding-inline: 12px 16px; } }
.lesson-end { display: grid; gap: var(--sp-4); }
.lesson-end__complete { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-3); }
.next-card { position: relative; display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px var(--sp-4); align-items: center; padding: var(--sp-5); border: 1px solid var(--line); border-radius: var(--r-panel); color: var(--ink); text-decoration: none; transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease); }
.next-card:hover { border-color: var(--line-strong); background: var(--surface-2); }
.next-card:focus-visible { outline: none; box-shadow: var(--focus-ring); }
.next-card__k { grid-column: 1; font-size: var(--fs-eyebrow); line-height: var(--lh-eyebrow); font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-3); }
.next-card__t { grid-column: 1; font-size: var(--fs-h3); line-height: var(--lh-h3); font-weight: 600; }
.next-card__m { grid-column: 1; font-size: var(--fs-meta); color: var(--ink-3); }
.next-card__go { grid-column: 2; grid-row: 1 / span 3; display: grid; place-items: center; width: 44px; height: 44px; border-radius: 50%; background: var(--surface-3); color: var(--ink); transition: background-color var(--t-fast) var(--ease); }
.next-card:hover .next-card__go { background: var(--grey-200); }
.next-card__go .ax-icon { width: 20px; height: 20px; }
.next-card:hover .next-card__t { text-decoration: underline; text-underline-offset: 3px; text-decoration-thickness: 1px; }

/* 5 The inline gate (locked lessons) ------------------------------------------------- */
.gate { position: relative; gap: var(--sp-5); }
.gate::before { content: ""; position: absolute; left: -8px; right: -8px; bottom: 100%; height: 140px; background: linear-gradient(rgba(255, 255, 255, 0), #fff 85%); pointer-events: none; }
.gate__rule { display: flex; align-items: center; gap: var(--sp-3); font-size: var(--fs-meta); line-height: var(--lh-meta); color: var(--ink-3); text-align: center; }
.gate__rule::before, .gate__rule::after { content: ""; flex: 1; height: 1px; background: var(--line); min-width: 16px; }
.gate__panel { display: grid; gap: var(--sp-5); padding: var(--sp-5); border-radius: var(--r-panel); background: var(--surface-2); border: 1px solid var(--line); }
@media (min-width: 768px) { .gate__panel { padding: var(--sp-6); } }
.gate__copy { display: grid; gap: var(--sp-2); max-width: 52ch; }
.gate__lead { color: var(--ink-2); }
.gate__progress { display: flex; align-items: center; gap: var(--sp-3); font-size: var(--fs-meta); color: var(--ink-2); margin-top: var(--sp-2); }
.gate__progress .progress { width: 96px; flex: none; }
.gate__form { max-width: 420px; }
.gate__outline { display: grid; gap: var(--sp-2); padding-inline: var(--sp-1); }
.gate__outline-title { font-size: var(--fs-eyebrow); line-height: var(--lh-eyebrow); font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-3); }
.gate__list { border-top: 1px solid var(--line); }
.gate__list li { display: grid; grid-template-columns: 20px minmax(0, 1fr) 16px; gap: var(--sp-3); align-items: start; padding-block: 12px; border-bottom: 1px solid var(--line); color: var(--ink-3); font-size: var(--fs-body); }
.gate__list .ax-icon { width: 20px; height: 20px; color: #b4b4b4; margin-top: 2px; }
.gate__list .gate__lock { width: 16px; height: 16px; margin-top: 4px; }

/* 6 The 3D scene box (still first, the model on tap or as it nears the screen) ---------- */
.scn-wrap { min-width: 0; }
.scn-still { position: relative; margin: 8px 0 32px; border: 1px solid var(--line); border-radius: var(--r-panel); overflow: hidden; background: var(--surface-3); }
.scn-still img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
.scn-still__bar { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: var(--sp-2) var(--sp-3); padding: var(--sp-3) var(--sp-4); background: var(--surface); border-top: 1px solid var(--line); }
.scn-still__k { display: inline-flex; align-items: center; gap: 8px; font-size: var(--fs-meta); font-weight: 500; color: var(--ink-2); }
.scn-still__k .ax-icon { width: 18px; height: 18px; color: var(--ink-3); }
.scn-still__btn { min-height: var(--tap); }
.scn-still__size { font-weight: 400; color: var(--ink-3); }
.scn-still__note { margin: 0; padding: 12px 16px; font-size: var(--fs-meta); color: var(--ink-3); }
.scn-wrap.is-auto .scn-still__btn { display: none; }
/* "Tap to interact": on touch screens the loaded model doesn't catch the page's scroll. */
.scn-wrap .scn__stage { position: relative; }
.scn-cover { position: absolute; inset: 0; z-index: 5; display: grid; place-items: center; padding: 0; border: 0; background: rgba(23, 23, 23, .12); color: var(--ink); font: inherit; cursor: pointer; touch-action: pan-y; -webkit-tap-highlight-color: transparent; }
.scn-cover span { display: inline-flex; align-items: center; gap: 8px; min-height: var(--tap); padding: 0 18px; border-radius: var(--r-pill); background: rgba(255, 255, 255, .94); font-weight: 600; font-size: .9375rem; box-shadow: var(--shadow-pop); }
.scn-cover .ax-icon { width: 18px; height: 18px; }
.scn-cover:focus-visible { outline: none; box-shadow: inset 0 0 0 3px var(--accent-strong); }

/* 7 Kits inside the frame (their CSS was written for the older page) ---------------------- */
.lab { grid-template-columns: minmax(0, 1fr); }
.lab__svg { overflow: hidden; }
.lab table { display: block; overflow-x: auto; max-width: 100%; }
.player__main .vsl-lesson, .player__main .hy-lesson { min-width: 0; }
.player__main .vsl-lesson { display: grid; gap: var(--sp-7); grid-template-columns: minmax(0, 1fr); }
.player__main .hy-text h2 { font-size: var(--fs-h2); line-height: var(--lh-h2); font-weight: 600; }
.player__main .hy-intro > p:first-child { font-size: var(--fs-lead); line-height: var(--lh-lead); }
/* hy bench: the drawing scrolls inside its own box, never the page. */
.player__main .bench { max-width: 100%; }
.player__main .bench__stage { max-width: 100%; }
@media (max-width: 479px) { .player__main .bench__svg { min-width: 520px; } }
.player__main .vsl-lead > p:first-child { font-size: var(--fs-lead); line-height: var(--lh-lead); }

/* 8 Course page ------------------------------------------------------------------------- */
.course-hero { display: grid; gap: var(--sp-4); }
.course-hero .ax-lead { max-width: 60ch; }
.course-hero__by { display: flex; flex-wrap: wrap; gap: 0; }
.course-hero__by > span + span::before { content: "·"; margin-inline: 8px; }
@media (max-width: 599px) { .course-hero__by > span + span { flex-basis: 100%; } .course-hero__by > span + span::before { content: none; } }
.course-hero__cta { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-3) var(--sp-5); margin-top: var(--sp-2); }
.course-hero__cta form { display: contents; }
@media (max-width: 479px) { .course-hero__cta > .btn--primary, .course-hero__cta form .btn { width: 100%; } }
.course-resume { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-4); margin-top: var(--sp-2); padding: var(--sp-4); border: 1px solid var(--line); border-radius: var(--r-panel); }
.course-resume__text { display: grid; gap: 2px; flex: 1; min-width: 12rem; }
.course-resume__text b { font-weight: 600; }
@media (max-width: 479px) { .course-resume .btn { width: 100%; } }
.course-media { position: relative; aspect-ratio: 16 / 9; border-radius: var(--r-panel); overflow: hidden; background: var(--surface-3); }
.course-media img { width: 100%; height: 100%; object-fit: cover; }
.course-media .tag { position: absolute; left: 12px; bottom: 12px; }
.course-box { display: grid; gap: var(--sp-4); padding: var(--sp-5); border: 1px solid var(--line); border-radius: var(--r-panel); background: var(--surface); }
.course-box__note { font-size: var(--fs-meta); color: var(--ink-2); }
.course-box__progress { display: grid; gap: var(--sp-3); }
.course-box__ring { display: flex; align-items: center; gap: var(--sp-3); }
.course-box__ring > span { display: grid; gap: 2px; }
.course-box .ax-checklist { gap: var(--sp-2); font-size: var(--fs-meta); }
.course-box .ax-checklist .ax-icon { color: var(--ink-3); width: 18px; height: 18px; }
.course-box__foot { padding-top: var(--sp-3); border-top: 1px solid var(--line); font-size: var(--fs-meta); color: var(--ink-3); }
.course-box form .btn { width: 100%; }
.course-sec { display: grid; gap: var(--sp-4); scroll-margin-top: calc(var(--header-h) + 16px); }
.course-sec__head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: var(--sp-2) var(--sp-4); }
.course-learn { display: grid; gap: var(--sp-3) var(--sp-6); }
@media (min-width: 768px) { .course-learn { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
.course-learn li { display: grid; grid-template-columns: 20px minmax(0, 1fr); gap: var(--sp-3); align-items: start; color: var(--ink-2); }
.course-learn .ax-icon { width: 20px; height: 20px; color: var(--ink-3); margin-top: 2px; }
/* Syllabus rows. */
.syllabus .accordion summary { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto 20px; gap: var(--sp-3); align-items: center; font-weight: 400; }
.syllabus .accordion summary::after { grid-column: 4; }
.syl__n { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 50%; background: var(--surface-3); color: var(--ink-2); font-size: var(--fs-meta); font-weight: 600; }
.syl__row.is-done .syl__n { background: var(--accent-wash); color: var(--accent-strong); }
.syl__main { display: grid; gap: 2px; min-width: 0; }
.syl__title { font-weight: 600; color: var(--ink); }
.syl__meta { font-size: var(--fs-meta); color: var(--ink-3); }
.syl__state { display: inline-flex; align-items: center; gap: 6px; font-size: var(--fs-meta); color: var(--ink-3); white-space: nowrap; }
.syl__state .ax-icon { width: 16px; height: 16px; }
.syl__state--open { color: var(--ink); font-weight: 500; }
.syl__state--done .ax-icon { color: var(--accent); }
.syl__body { padding-left: calc(28px + var(--sp-3)); }
.syl__note { display: flex; align-items: center; gap: var(--sp-2); padding-bottom: var(--sp-3); color: var(--ink-2); }
.syl__note .ax-icon { width: 16px; height: 16px; color: var(--ink-3); }
.syl__group { padding: var(--sp-5) 0 var(--sp-2); border-bottom: 1px solid var(--line); font-size: var(--fs-eyebrow); line-height: var(--lh-eyebrow); font-weight: 500; letter-spacing: .04em; text-transform: uppercase; color: var(--ink-3); }
.syl__extra { display: grid; grid-template-columns: 28px minmax(0, 1fr) auto; gap: var(--sp-3); align-items: center; min-height: 64px; padding-block: 12px; border-bottom: 1px solid var(--line); color: var(--ink-2); }
.syl__extra .ax-icon { width: 20px; height: 20px; color: var(--ink-3); justify-self: center; }
/* Phones: one compact row per lesson; the state is its icon at the right (the word stays for
   screen readers), so 19 locked lessons don't repeat "Free with account" 19 times. */
@media (max-width: 599px) {
  .syllabus .accordion summary { grid-template-columns: 28px minmax(0, 1fr) 20px 20px; gap: var(--sp-2) var(--sp-3); align-items: start; padding-block: 12px; min-height: 0; }
  .syllabus .accordion summary::after { grid-column: 4; grid-row: 1; margin-top: 4px; }
  .syllabus .accordion summary .syl__n { margin-top: -2px; }
  .syl__state { grid-column: 3; grid-row: 1; margin-top: 4px; }
  .syl__state-text { position: absolute !important; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }
  .syl__extra { grid-template-columns: 28px minmax(0, 1fr); }
  .syl__extra .syl__state { grid-column: 2; grid-row: 2; }
  .syl__body { padding-left: 0; }
}
/* Who it's for, the certificate. */
.course-chips { display: flex; flex-wrap: wrap; gap: var(--sp-2); }
.course-chips .chip { cursor: default; }
.course-cert { display: grid; gap: var(--sp-5); align-items: center; }
@media (min-width: 768px) { .course-cert { grid-template-columns: 240px minmax(0, 1fr); } }
.cert-thumb { aspect-ratio: 1.414; border: 1px solid var(--line); border-radius: var(--r-control); background: var(--surface); padding: 14px; display: grid; align-content: space-between; box-shadow: 0 1px 0 var(--line), 0 0 0 6px var(--surface-2); max-width: 280px; }
.cert-thumb__top { display: flex; align-items: center; gap: 6px; font-size: 9px; font-weight: 600; letter-spacing: .02em; color: var(--ink-2); }
.cert-thumb__top .ax-mark { width: 14px; height: 14px; }
.cert-thumb__mid { display: grid; gap: 4px; justify-items: center; text-align: center; }
.cert-thumb__k { font-size: 7px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-3); }
.cert-thumb__name { width: 60%; height: 8px; border-radius: 4px; background: var(--ink); opacity: .85; }
.cert-thumb__course { font-size: 9px; font-weight: 600; color: var(--ink); line-height: 1.3; max-width: 90%; }
.cert-thumb__foot { display: flex; justify-content: space-between; align-items: flex-end; font-size: 6px; color: var(--ink-3); }
.cert-thumb__seal { width: 22px; height: 22px; border-radius: 50%; border: 2px solid var(--accent); }
.course-about .prose { color: var(--ink-2); }
.course-close { display: grid; gap: var(--sp-4); justify-items: start; padding: var(--sp-6); border-radius: var(--r-panel); background: var(--surface-2); }
@media (min-width: 768px) { .course-close { grid-template-columns: minmax(0, 1fr) auto; align-items: center; padding: var(--sp-7); } }
.course-close form { display: contents; }
/* Phone: the enrol box's content is in the hero; a sticky Start bar shows once the hero button has scrolled away. */
@media (max-width: 1023px) { .course-page .ax-split__aside { display: none; } }
.course-sticky { position: fixed; z-index: 35; left: 0; right: 0; bottom: 0; display: flex; align-items: center; gap: var(--sp-3); min-height: 64px; padding: 8px var(--gutter) calc(8px + env(safe-area-inset-bottom)); background: var(--surface); border-top: 1px solid var(--line); transform: translateY(110%); transition: transform var(--t-sheet) var(--ease); }
.course-sticky.is-shown { transform: none; }
.course-sticky__t { flex: 1; min-width: 0; display: grid; }
.course-sticky__t b { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; font-size: .9375rem; }
.course-sticky__t span { font-size: var(--fs-meta); color: var(--ink-3); }
.course-sticky form { display: contents; }
.course-sticky .btn { flex: none; }
@media (min-width: 1024px) { .course-sticky { display: none; } }
@media (max-width: 1023px) { html:has(.course-sticky) { scroll-padding-bottom: calc(80px + env(safe-area-inset-bottom)); } .course-page-end { height: 72px; } }

/* 9 Final quiz and result ------------------------------------------------------------------ */
.final-head { display: grid; gap: var(--sp-3); }
.final-count { font-variant-numeric: tabular-nums; }
.final-score { display: flex; flex-wrap: wrap; align-items: center; gap: var(--sp-5); padding: var(--sp-5); border-radius: var(--r-panel); background: var(--surface-2); }
.final-score__text { display: grid; gap: var(--sp-1); flex: 1; min-width: 14rem; }
.final-score__text .ax-h1 { font-size: var(--fs-h2); line-height: var(--lh-h2); }

@media print {
  .pbar, .player__bar, .ptoc, .player-sheet, .course-sticky, .lesson-end, .lq { display: none !important; }
  .player__main { padding: 0; }
}