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2rem));transform:translate(-50%)}.rf-teacher[data-astro-cid-2yp2h33d]{position:relative;z-index:1;min-width:0;overflow:hidden;opacity:0;transform:translateY(16px);transition:opacity .28s ease,transform .28s ease}.rf-teacher[data-astro-cid-2yp2h33d].is-on{opacity:1;transform:translateY(0)}.rf-teacher-bars[data-astro-cid-2yp2h33d]{display:flex;align-items:flex-end;gap:clamp(3px,.65vw,7px);width:100%;min-width:0;height:clamp(54px,8vw,92px)}.rf-teacher-bar[data-astro-cid-2yp2h33d]{flex:1 1 0;min-width:3px;height:var(--h);border-radius:2px 2px 0 0;background:var(--red);opacity:.12;transition:opacity .22s ease,transform .22s ease;transform-origin:bottom}.rf-teacher-bar[data-astro-cid-2yp2h33d].is-lit{opacity:.88;transform:scaleY(1.02)}.rf-teacher-bar--green[data-astro-cid-2yp2h33d]{background:var(--green)}.rf-bar-arrow[data-astro-cid-2yp2h33d]{appearance:none;position:relative;z-index:2;display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid rgba(255,255,255,.1);border-radius:999px;background:#0d0d0d8f;color:var(--text);cursor:pointer;font:inherit;font-size:1.7rem;line-height:1;backdrop-filter:blur(14px);transition:background .18s ease,border-color .18s ease,color .18s ease,opacity .18s ease}.rf-bar-arrow[data-astro-cid-2yp2h33d]:hover,.rf-bar-arrow[data-astro-cid-2yp2h33d]:focus-visible{border-color:#ff3b3057;background:#ff3b3029;color:var(--text);outline:none}.rf-bar-arrow[data-astro-cid-2yp2h33d]:disabled{cursor:default;opacity:.28}.rf-lesson-root[data-astro-cid-2yp2h33d]>section[data-astro-cid-2yp2h33d]{border-top:0}.rf-lesson-root[data-astro-cid-2yp2h33d]{position:fixed;inset:0;display:block;width:100vw;height:100vh;overflow:hidden}.rf-scene[data-astro-cid-2yp2h33d],.rf-part[data-astro-cid-2yp2h33d]{position:absolute;inset:0;display:flex;align-items:center;width:100vw;height:100vh;min-height:100vh;padding:8vh 6vw 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