.lesson-module__rA3QpG__quiet,.lesson-module__rA3QpG__tick,.lesson-module__rA3QpG__notch{clip-path:var(--os-pixel-shape)}.lesson-module__rA3QpG__chip{--os-step:var(--os-step-4)}.lesson-module__rA3QpG__square,.lesson-module__rA3QpG__square *,.lesson-module__rA3QpG__square :before,.lesson-module__rA3QpG__square :after{border-radius:0}.lesson-module__rA3QpG__player{background:var(--os-void);color:var(--os-on-dark)}.lesson-module__rA3QpG__frame{width:100%;margin-inline:auto}@media (min-width:1024px){.lesson-module__rA3QpG__frame{width:min(100%,177.778dvh - 21.3333rem)}}@media (orientation:landscape) and (max-height:520px){.lesson-module__rA3QpG__frame{width:min(100%,177.778dvh)}}.lesson-module__rA3QpG__quiet{--os-step:var(--os-step-6);min-height:var(--os-control);background:var(--card);color:var(--foreground);letter-spacing:-.01em;transition:background-color .18s ease, transform .26s var(--os-ease);justify-content:center;align-items:center;gap:12px;padding:12px 16px;font-size:16px;font-weight:500;line-height:24px;text-decoration:none;display:inline-flex}.lesson-module__rA3QpG__quiet:hover{background:var(--muted)}.lesson-module__rA3QpG__quiet:active:not([aria-disabled=true]){transition-duration:.1s;transform:scale(.985)}.lesson-module__rA3QpG__quiet:focus-visible{outline:2px solid var(--os-blue);outline-offset:-4px}.lesson-module__rA3QpG__quiet[aria-disabled=true],.lesson-module__rA3QpG__quiet:disabled{opacity:.5;cursor:not-allowed}.lesson-module__rA3QpG__quiet[aria-disabled=true]:hover,.lesson-module__rA3QpG__quiet:disabled:hover{background:var(--card)}.lesson-module__rA3QpG__tick{--os-step:var(--os-step-2);background:var(--os-teal);width:24px;height:24px;color:var(--os-ink);flex:none;place-items:center;display:grid}.lesson-module__rA3QpG__primary:disabled{opacity:.55;cursor:not-allowed}.lesson-module__rA3QpG__primary:disabled:hover{background:var(--os-blue)}.lesson-module__rA3QpG__dock{z-index:30;margin-inline:calc(-1 * var(--os-gutter));padding:12px var(--os-gutter) max(12px, env(safe-area-inset-bottom));background:color-mix(in oklch, var(--background) 94%, transparent);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border-top:1px solid var(--border);gap:8px;display:flex;position:sticky;bottom:0}@media (min-width:1024px){.lesson-module__rA3QpG__dock{margin-inline:0;padding-inline:0}}.lesson-module__rA3QpG__body .prose :is(h1,h2,h3,h4){letter-spacing:-.035em;font-weight:500}.lesson-module__rA3QpG__body .prose blockquote{border-left-width:4px;border-left-color:var(--os-teal)}.lesson-module__rA3QpG__more{min-height:var(--os-control);color:var(--os-blue);justify-content:center;align-items:center;gap:12px;padding:12px 16px;font-size:16px;font-weight:500;line-height:24px;display:inline-flex}.lesson-module__rA3QpG__more:hover{color:var(--os-blue-hover)}.lesson-module__rA3QpG__more:focus-visible{outline:2px solid var(--os-blue);outline-offset:2px}.dark .lesson-module__rA3QpG__more{color:color-mix(in oklch, var(--os-blue) 70%, white)}@media (prefers-reduced-motion:reduce){.lesson-module__rA3QpG__quiet{transition:none}.lesson-module__rA3QpG__quiet:active:not([aria-disabled=true]){transform:none}}