.lesson-nav[data-astro-cid-rtpef7ws]{position:fixed;right:0;top:4rem;height:calc(100vh - 4rem);z-index:40;display:flex;align-items:flex-start;transform:translate(320px);transition:transform .3s ease}.lesson-nav[data-astro-cid-rtpef7ws].open{transform:translate(0)}.lesson-nav-toggle[data-astro-cid-rtpef7ws]{flex-shrink:0;width:2.5rem;height:2.5rem;margin-top:1rem;background:var(--color-surface);border:1px solid var(--color-border);border-right:none;border-radius:.5rem 0 0 .5rem;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--color-text-muted);transition:background .2s ease,color .2s ease}.lesson-nav-toggle[data-astro-cid-rtpef7ws]:hover{background:var(--color-surface-alt);color:var(--color-text)}.lesson-nav[data-astro-cid-rtpef7ws] .toggle-icon[data-astro-cid-rtpef7ws]{transition:transform .3s ease}.lesson-nav[data-astro-cid-rtpef7ws].open .toggle-icon[data-astro-cid-rtpef7ws]{transform:rotate(180deg)}.lesson-nav-panel[data-astro-cid-rtpef7ws]{width:320px;height:100%;background:var(--color-surface);border-left:1px solid var(--color-border);display:flex;flex-direction:column;overflow:hidden}.lesson-nav-header[data-astro-cid-rtpef7ws]{padding:1rem 1.25rem;border-bottom:1px solid var(--color-border);background:var(--color-surface-alt)}.lesson-nav[data-astro-cid-rtpef7ws] .course-title[data-astro-cid-rtpef7ws]{display:block;font-weight:600;color:var(--color-text);text-decoration:none;margin-bottom:.75rem;font-size:.95rem}.lesson-nav[data-astro-cid-rtpef7ws] .course-title[data-astro-cid-rtpef7ws]:hover{color:var(--color-primary)}.lesson-nav[data-astro-cid-rtpef7ws] .progress-info[data-astro-cid-rtpef7ws]{display:flex;flex-direction:column;gap:.375rem}.lesson-nav[data-astro-cid-rtpef7ws] .progress-text[data-astro-cid-rtpef7ws]{font-size:.75rem;color:var(--color-text-muted)}.lesson-nav[data-astro-cid-rtpef7ws] .progress-bar-container[data-astro-cid-rtpef7ws]{height:4px;background:var(--color-border);border-radius:2px;overflow:hidden}.lesson-nav[data-astro-cid-rtpef7ws] .progress-bar-fill[data-astro-cid-rtpef7ws]{height:100%;background:var(--color-primary);border-radius:2px;transition:width .3s ease}.lesson-nav-content[data-astro-cid-rtpef7ws]{flex:1;overflow-y:auto;padding:1rem 0}.lesson-nav[data-astro-cid-rtpef7ws] .module-group[data-astro-cid-rtpef7ws]{margin-bottom:1.25rem}.lesson-nav[data-astro-cid-rtpef7ws] .module-title[data-astro-cid-rtpef7ws]{font-size:.7rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);padding:0 1.25rem;margin-bottom:.5rem}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-list[data-astro-cid-rtpef7ws]{list-style:none;padding:0;margin:0}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-link[data-astro-cid-rtpef7ws]{display:flex;align-items:center;gap:.625rem;padding:.5rem 1.25rem;text-decoration:none;color:var(--color-text);font-size:.85rem;transition:all .15s ease;border-left:3px solid transparent}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-link[data-astro-cid-rtpef7ws]:hover{background:var(--color-surface-alt)}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-link[data-astro-cid-rtpef7ws].active{background:color-mix(in oklab,var(--color-primary) 10%,transparent);border-left-color:var(--color-primary);color:var(--color-primary)}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-number[data-astro-cid-rtpef7ws]{flex-shrink:0;width:1.5rem;height:1.5rem;border-radius:50%;background:var(--color-border);display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:600;color:var(--color-text-muted)}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-link[data-astro-cid-rtpef7ws].completed .lesson-number[data-astro-cid-rtpef7ws]{background:var(--color-success);color:#fff}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-link[data-astro-cid-rtpef7ws].active .lesson-number[data-astro-cid-rtpef7ws]{background:var(--color-primary);color:#fff}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-title[data-astro-cid-rtpef7ws]{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lesson-nav[data-astro-cid-rtpef7ws] .lesson-time[data-astro-cid-rtpef7ws]{flex-shrink:0;font-size:.7rem;color:var(--color-text-muted)}@media(max-width:1023px){.lesson-nav[data-astro-cid-rtpef7ws]{display:none}}.astro-route-announcer{position:absolute;left:0;top:0;clip:rect(0 0 0 0);clip-path:inset(50%);overflow:hidden;white-space:nowrap;width:1px;height:1px}html.quiz-hidden .quiz-container{display:none!important}.quiz-toggle[data-astro-cid-xizwsys5].quiz-on{background-color:color-mix(in oklab,var(--color-primary) 10%,transparent);color:var(--color-primary);border-color:color-mix(in oklab,var(--color-primary) 30%,transparent)}.quiz-toggle[data-astro-cid-xizwsys5].quiz-on:hover{background-color:color-mix(in oklab,var(--color-primary) 20%,transparent)}.quiz-toggle[data-astro-cid-xizwsys5].quiz-off{background-color:var(--color-surface-alt);color:var(--color-text-muted);border-color:var(--color-border)}.quiz-toggle[data-astro-cid-xizwsys5].quiz-off:hover{background-color:var(--color-surface);color:var(--color-text)}.line-clamp-2[data-astro-cid-vjhymmee]{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}