.alx-shell{--alx-font:var(--fs-sans);--alx-gutter:24px;--alx-width:600px;--alx-success:#397455;--alx-caution:#896121;width:100%;height:100svh;min-height:0;padding:0;font-family:var(--fs-sans)}.al-shell.alx-shell{padding:0}[data-theme=dark] .alx-shell{--alx-success:#9ac8aa;--alx-caution:#e5bc7b}.alx-shell .alx-frame{display:grid;grid-template-rows:auto minmax(0,1fr) auto;width:100%;height:100%;min-height:0;overflow:clip;position:relative;background:var(--al-bg);color:var(--al-ink)}.alx-frame:after{content:"";position:absolute;inset:0;z-index:9;pointer-events:none;border:2px solid transparent;transition:border-color .2s}.alx-frame[data-feedback=correct]:after{border-color:color-mix(in srgb,var(--alx-success) 24%,transparent)}.alx-frame[data-feedback=incorrect]:after{border-color:color-mix(in srgb,var(--alx-caution) 24%,transparent)}.alx-frame.sh-player,.alx-frame.sh-player[data-appearance=dark],:root[data-theme=dark] .alx-frame.sh-player:not([data-appearance]){--bg:var(--al-bg);--sans:var(--alx-font)}.alx-frame.pyx-shell{--pv-bg:var(--al-bg);--app-cream:var(--al-bg)}.alx-frame.pyx-shell,.alx-frame.reader-stage{background:var(--al-bg)}.alx-frame.reader-stage .reader{background:var(--al-bg);min-height:0}.alx-shell .alx-frame .alx-top{width:min(var(--alx-width),calc(100% - var(--alx-gutter)*2));margin-inline:auto;padding-block:calc(16px + env(safe-area-inset-top, 0px)) 16px;display:grid;grid-template-columns:44px minmax(0,1fr) auto;align-items:center;gap:24px;min-height:88px;z-index:12;background:var(--al-bg);border:0;position:relative}.alx-frame .alx-back{display:grid;place-items:center;width:44px;height:44px;padding:0;border-radius:50%;color:var(--al-muted);text-decoration:none}.alx-frame .alx-back:hover{color:var(--al-ink);background:var(--al-line)}.alx-xp{font:500 14px/1.4 var(--fs-sans);white-space:nowrap;text-align:right;color:var(--al-muted);font-feature-settings:"tnum";font-variant-numeric:tabular-nums}.alx-xp strong{color:var(--al-ink);font-weight:600}.alx-progress{min-width:0;width:100%}.alx-progress,.alx-progress-disclosure{position:relative}.alx-progress-summary{list-style:none;display:flex;align-items:center;min-height:44px;cursor:pointer;border-radius:6px}.alx-progress-summary::-webkit-details-marker,.alx-settings>summary::-webkit-details-marker{display:none}.alx-step-list{width:100%}.alx-step,.alx-step-list{display:flex;align-items:center;gap:5px;min-width:0}.alx-step{flex:1 1}.alx-step-bar{display:block;height:5px;border-radius:5px;background:var(--al-line);flex:1 1;min-width:1px}.alx-step[data-completed=true] .alx-step-bar{background:var(--al-accent)}.alx-step[data-state=current] .alx-step-bar{outline:1px solid var(--al-accent);outline-offset:2px}.alx-step-checkpoint{display:block;width:10px;height:10px;flex:none;border:2px solid var(--al-line);border-radius:50%;background:var(--al-bg)}.alx-step[data-completed=true] .alx-step-checkpoint{background:var(--al-accent);border-color:var(--al-accent)}.alx-progress-menu{position:absolute;top:calc(100% + 8px);left:0;z-index:20;width:min(360px,calc(100vw - 48px));max-height:min(60dvh,420px);overflow-y:auto;padding:12px;border:1px solid var(--al-line);border-radius:14px;background:var(--al-paper);color:var(--al-ink);box-shadow:0 8px 30px #0002}.alx-progress-menu__heading{margin:2px 8px 8px;font:600 16px/1.5 var(--fs-sans)}.alx-progress-menu__list{list-style:none;padding:0;margin:0}.alx-frame .alx-progress-option{width:100%;min-height:44px;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 12px;border:0;border-radius:8px;background:transparent;color:var(--al-muted);font:500 15px/1.5 var(--fs-sans);text-align:left}.alx-frame button.alx-progress-option{color:var(--al-ink);cursor:pointer}.alx-frame .alx-progress-option[aria-current=step],.alx-frame button.alx-progress-option:hover{background:var(--al-soft);color:var(--al-accent)}.alx-progress-option__state{font-size:14px}.alx-shell .alx-frame .alx-body{min-height:0;width:100%;padding:24px var(--alx-gutter) 32px;overflow-y:auto;overflow-x:hidden;overscroll-behavior-y:contain;display:flex;flex-direction:column;scrollbar-width:thin;scrollbar-color:var(--al-line) transparent}.alx-frame .alo-hint-row{flex:none;width:min(var(--alx-width),100%);padding:0;margin:0 auto 16px}.alx-frame .alo-hint-row:empty{display:none}.alx-shell .alx-frame .alx-body>.pyx-body,.alx-shell .alx-frame .alx-body>.reader,.alx-shell .alx-frame .alx-body>.sh-stage{width:min(var(--alx-width),100%);max-width:var(--alx-width);min-height:0;margin:auto;padding:0;flex:1 0 auto;overflow:visible;border:0;border-radius:0;background:transparent}.alx-shell .alx-frame .sh-stage{align-items:safe center;scroll-margin:0}.alx-shell .alx-frame .sh-scene{min-height:0;width:100%;scroll-margin:0}.alx-shell .alx-frame .pyx-body{display:flex;flex-direction:column}.alx-shell .alx-frame .pyx-pane{display:contents}.alx-shell .alx-frame.pyx-shell .pyx-content{width:100%;min-height:0;flex:1 0 auto;padding:0;margin:0;overflow:visible;scrollbar-gutter:auto;justify-content:safe center}.alx-frame .lcx-stage{min-height:0;flex:1 0 auto}.alx-shell .alx-frame .alx-foot{display:block;position:relative;inset:auto;z-index:10;width:100%;margin:0;padding:16px var(--alx-gutter) max(28px,env(safe-area-inset-bottom));border:0;background:var(--al-bg);color:var(--al-ink);font:400 16px/1.5 var(--fs-sans)}.alx-foot-inner{width:min(var(--alx-width),100%);margin-inline:auto}.alx-coach{display:flex;gap:12px;align-items:center;min-height:52px;margin-bottom:14px;min-width:0}.alx-coach--empty{display:none}.alx-coach-copy{min-width:0;max-width:48ch;font:400 16px/1.5 var(--fs-sans);overflow-wrap:anywhere}.alx-coach-copy p{margin:0}.alx-coach-copy summary{cursor:pointer;min-height:44px;display:flex;align-items:center}.alx-coach-copy details p{padding-top:6px}.alx-frame[data-feedback=correct] .alx-coach-copy{color:var(--alx-success)}.alx-frame[data-feedback=incorrect] .alx-coach-copy{color:var(--alx-caution)}.alx-control-row{justify-content:space-between;gap:20px}.alx-control-row,.alx-secondary{display:flex;align-items:center;min-width:0}.alx-secondary{gap:18px;flex-wrap:wrap}.alx-shell .alx-frame .alx-actions{display:flex;align-items:center;justify-content:flex-end;gap:20px;min-width:0;margin:0}.alx-shell .alx-frame :is(.sh-footer-center,.alx-primary-action){display:flex;flex-direction:row-reverse;align-items:center;gap:20px;min-width:0;width:auto}.alx-frame .alx-actions :is(.sh-footer-hint,.alx-action-reason,.alx-gate-reason){font:400 14px/1.4 var(--fs-sans);max-width:190px;text-align:left;color:var(--al-muted);margin:0}.alx-frame .alx-actions .sh-footer-hint--quiet,.alx-frame .alx-gate-reason:empty{display:none}.alx-shell .alx-frame .alx-actions :is(.sh-continue,.pyx-cta,.lpx-cta){flex:none;width:auto;min-width:156px;max-width:none;min-height:50px;display:inline-flex;align-items:center;justify-content:center;gap:12px;margin:0;padding:13px 26px;border:0;border-radius:100px;background:linear-gradient(color-mix(in srgb,var(--al-primary) 82%,white),var(--al-primary));color:var(--al-primary-ink);box-shadow:0 3px 0 var(--al-primary-shadow);font:600 16px/1.4 var(--fs-sans);text-transform:none;letter-spacing:0;white-space:normal;text-align:center;cursor:pointer}.alx-shell .alx-frame .alx-actions :is(.sh-continue,.pyx-cta,.lpx-cta):is(:disabled,[aria-disabled=true]){opacity:.5;cursor:default}.alx-shell .alx-frame .alx-actions :is(.sh-continue,.pyx-cta,.lpx-cta):active:not(:disabled):not([aria-disabled=true]){transform:translateY(2px);box-shadow:0 1px 0 var(--al-primary-shadow)}.alx-frame .alx-actions :is(.chrome-foot,.lpx-foot){border:0;padding:0;margin:0}.alx-settings>summary,.alx-shell .alx-frame .alx-secondary :is(.sh-back,.pyf-back,.pyx-back,button){display:inline-flex;align-items:center;min-height:44px;padding:8px 0;margin:0;border:0;background:transparent;color:var(--al-muted);font:400 14.5px/1.4 var(--fs-sans);text-decoration:none;white-space:nowrap;cursor:pointer;list-style:none}.alx-frame .alx-secondary button:disabled,.alx-frame .alx-secondary button[aria-disabled=true]{opacity:.45;cursor:default}.alx-settings{position:relative}.alx-settings[open]>summary{color:var(--al-accent)}.alx-frame .alx-tools{position:absolute;bottom:calc(100% + 10px);left:0;z-index:20;width:240px;max-width:calc(100vw - 40px);max-height:max(80px,calc(100svh - 190px));overflow-y:auto;padding:10px;display:flex;flex-direction:column;gap:4px;background:var(--al-paper);border:1px solid var(--al-line);border-radius:14px;box-shadow:0 8px 30px #0002}.alx-frame .alx-tools :is(.sh-tools,.pyf-tools){display:contents}.alx-shell .alx-frame .alx-tools button{width:100%;min-height:44px;height:auto;margin:0;padding:10px;display:flex;align-items:center;gap:12px;border:0;border-radius:8px;background:transparent;color:var(--al-ink);font:400 14.5px/1.4 var(--fs-sans);text-align:left;cursor:pointer;white-space:normal}.alx-frame .alx-tools :is(.sh-tools,.pyf-tools) button[aria-label]:after{content:attr(aria-label)}.alx-frame .alx-tools button svg{width:18px;height:18px;flex:none}.alx-frame .alx-tools button:hover{background:var(--al-soft)}.alx-frame .alx-tools button:disabled{color:var(--al-muted);cursor:default}.alx-frame :is(.alx-back,.alx-progress-summary,.alx-progress-option,.alx-settings summary,.alx-tools button,.alx-actions button,.alx-secondary button):focus-visible{outline:3px solid var(--al-accent);outline-offset:4px}@media (min-width:900px){.alx-shell{--alx-gutter:clamp(36px,4vw,72px);--alx-width:1390px}.alx-shell .alx-frame .alx-top{min-height:96px;gap:32px;padding-block:24px}.alx-shell .alx-frame .alx-body{padding-block:28px 38px}.alx-shell .alx-frame .alx-foot{padding-top:22px;padding-bottom:max(36px,env(safe-area-inset-bottom))}.alx-foot-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:28px}.alx-coach{margin:0}.alx-control-row{gap:28px}.alx-shell .alx-frame .alx-actions :is(.sh-continue,.pyx-cta,.lpx-cta){min-width:192px;min-height:54px}.alx-foot--quiet .alx-control-row{grid-column:2}}@media (max-width:600px){.alx-shell{--alx-gutter:20px}.alx-shell .alx-frame .alx-top{width:calc(100% - 32px);min-height:70px;padding-block:calc(10px + env(safe-area-inset-top, 0px)) 10px;gap:12px;grid-template-columns:40px minmax(0,1fr) auto}.alx-frame .alx-back{width:40px}.alx-step,.alx-step-list{gap:3px}.alx-step-checkpoint{width:7px;height:7px;border-width:1.5px}.alx-progress-menu{position:fixed;left:20px;top:calc(66px + env(safe-area-inset-top, 0px));width:calc(100vw - 40px)}.alx-shell .alx-frame .alx-body{padding-top:18px;padding-bottom:22px}.alx-shell .alx-frame .alx-foot{padding-top:12px;padding-bottom:max(22px,env(safe-area-inset-bottom))}.alx-coach{gap:9px;min-height:44px;margin-bottom:10px}.alx-coach [data-learning-tensor]{zoom:.81}.alx-coach-copy{font-size:14.5px;line-height:1.45}.alx-control-row{gap:12px;align-items:flex-end}.alx-secondary{gap:14px}.alx-shell .alx-frame .alx-actions{gap:8px;flex-direction:column;align-items:flex-end}.alx-shell .alx-frame :is(.sh-footer-center,.alx-primary-action){flex-direction:column-reverse;gap:8px;align-items:flex-end}.alx-frame .alx-actions :is(.sh-footer-hint,.alx-action-reason,.alx-gate-reason){max-width:190px;font-size:14px}.alx-shell .alx-frame .alx-actions :is(.sh-continue,.pyx-cta,.lpx-cta){min-width:143px;max-width:min(190px,55vw);min-height:48px;padding:12px 22px;font-size:15px}.alx-frame .alx-tools{position:fixed;bottom:max(88px,env(safe-area-inset-bottom));left:20px;max-height:calc(100svh - 180px);overflow-y:auto}}@media (max-height:650px){.alx-shell .alx-frame .alx-top{min-height:64px;padding-block:10px}.alx-shell .alx-frame .alx-body{padding-top:14px;padding-bottom:18px}.alx-shell .alx-frame .alx-foot{padding-top:10px;padding-bottom:max(16px,env(safe-area-inset-bottom))}}@media (prefers-reduced-motion:reduce){.alx-frame .alx-actions button,.alx-frame:after{transition:none}}