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#e9e9ed2e,0 6px 18px #0000008c}.lesson__sidebar-toggle{z-index:30;border:1px solid var(--color-divider);border-radius:var(--radius-md);width:36px;height:36px;color:var(--color-text);cursor:pointer;background:#1b1d2c;place-items:center;display:none;position:fixed;bottom:16px;left:16px}.lesson__sidebar-backdrop{z-index:15;background:#00000080;position:fixed;inset:0}@media (width<=1100px) and (width>=861px){.lesson{grid-template-columns:64px 1fr}.lesson__sidebar{padding:var(--space-6) var(--space-2);align-items:center}.lesson__sidebar-header,.lesson__chapter-label,.lesson__blocks,.lesson__row-label{display:none}.lesson__row{justify-content:center;width:40px}.lesson__main{padding:var(--space-8) 28px}}@media (width<=860px){.lesson{grid-template-columns:1fr}.lesson__sidebar-toggle{display:grid}.lesson__sidebar{z-index:20;width:272px;transition:transform 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