.textbook{position:relative;flex:1 1;min-height:0;min-width:0;display:flex;overflow:hidden}.textbook-scroll{flex:1 1;min-width:0;overflow:auto;overflow-anchor:auto;scrollbar-gutter:stable}.textbook-body{min-height:100%;box-sizing:border-box;padding:24px 24px 0}.textbook-loading{width:100%;align-items:center;justify-content:center;padding:32px}.textbook-loading,.textbook-navigation{display:flex;flex-direction:column;box-sizing:border-box}.textbook-navigation{width:240px;flex-shrink:0;min-height:0;background:var(--textbook-nav-bg);border-right:1px solid var(--textbook-nav-border)}.textbook-navigation-controls{display:flex;align-items:center;gap:6px;padding:12px;border-bottom:1px solid var(--textbook-nav-border);flex-shrink:0}.textbook-mode-buttons{display:flex;flex:1 1;min-width:0;gap:6px}.textbook-mode-buttons button{flex:1 1;min-width:0;min-height:38px;padding:0 6px;border:1px solid var(--textbook-nav-border);border-radius:6px;background:transparent;color:inherit;font:inherit;font-size:12px;font-weight:600;cursor:pointer}.textbook-mode-buttons button:hover,.textbook-mode-buttons button[aria-pressed=true]{background:var(--textbook-nav-selected)}.textbook-contents button:focus-visible,.textbook-mode-buttons button:focus-visible{outline:2px solid currentColor;outline-offset:2px}.textbook-contents{min-height:0;overflow:auto;scrollbar-width:thin;padding:12px 10px 20px}.textbook-contents ul{list-style:none;margin:0;padding:0}.textbook-contents ul ul{margin-left:8px;padding-left:8px;border-left:1px solid #8883}.textbook-content-row,.textbook-contents button{display:flex;gap:8px;width:100%;text-align:left;padding:8px;border:0;background:transparent;color:inherit;font:inherit;font-size:12px;line-height:1.5;border-radius:5px;cursor:pointer}.textbook-content-row:hover,.textbook-contents button:hover{background:#8881}.textbook-content-row.active,.textbook-contents button.active{background:var(--textbook-nav-selected);font-weight:600}.textbook-content-row{align-items:center;gap:0;padding:0}.textbook-contents .textbook-content-link{flex:1 1;min-width:0;padding-right:4px;background:transparent}.textbook-contents .textbook-content-row.active .textbook-content-link,.textbook-contents .textbook-content-row:hover .textbook-content-link{background:transparent}.textbook-contents .textbook-progress-meter-button{width:auto;flex:0 0 auto;padding:8px;background:transparent}.textbook-contents .textbook-progress-meter-button:hover{background:#8882}.textbook-progress-meter{display:inline-flex;align-items:center;gap:2px;margin-left:auto;padding-left:8px;flex-shrink:0}.textbook-progress-meter i{display:block;width:4px;height:11px;border-radius:2px;background:color-mix(in srgb,currentColor 17%,transparent)}.textbook-progress-meter-neutral i.filled{background:#8f8a82}.textbook-progress-meter-red i.filled{background:#c84d41}.textbook-progress-meter-orange i.filled{background:#d5902f}.textbook-progress-meter-purple i.filled{background:#8062a8}.textbook-progress-meter-blue i.filled{background:#4467bd}.textbook-progress-meter-green i.filled{background:#3f865e}.textbook-folder{font-weight:600!important}.textbook .textbook-navigation-collapsed{width:0;border:0;overflow:hidden}.textbook-pages{min-width:0;width:100%;max-width:840px;margin:0 auto}.textbook-section{scroll-margin-top:24px;margin-bottom:64px}.textbook-section:last-of-type{margin-bottom:0}.textbook-navigation-backdrop{display:none}.textbook-end{text-align:center;padding:64px 32px;opacity:.5;font-family:Georgia,serif}@media (max-width:1200px){.textbook-navigation{width:220px}.textbook-body{padding:20px 16px 0}}@media (max-width:600px){.textbook .textbook-navigation{position:absolute;z-index:4;inset:0 auto 0 0;width:min(86vw,320px);max-height:none;border-right:1px solid var(--textbook-nav-border);box-shadow:16px 0 32px rgb(0 0 0/16%);transition:transform .18s ease}.textbook .textbook-navigation-collapsed{width:min(86vw,320px);transform:translateX(-100%);pointer-events:none;box-shadow:none}.textbook-navigation-backdrop{display:block;position:absolute;z-index:3;inset:0;width:100%;height:100%;padding:0;border:0;background:rgb(0 0 0/34%)}.textbook-navigation-collapsed .textbook-navigation-controls,.textbook-navigation-controls{padding:6px 12px}.textbook-body{padding:16px 12px 0}}