[data-lesson-timeline]{--lt-slate:#30343b;--lt-mist:#f2f2ef;--lt-gold:#b89a5a;--lt-muted:#686657;--lt-surface:#fff;color:var(--lt-slate);font-family:'DM Sans',sans-serif;max-width:860px;min-width:0;margin-inline:auto;padding:clamp(12px,3vw,28px);box-sizing:border-box}
[data-lesson-timeline] *{box-sizing:border-box;min-width:0}
[data-lesson-timeline] h2{font-family:'Fraunces',serif;font-size:clamp(1.5rem,4vw,2.25rem);font-weight:500;overflow-wrap:anywhere}
[data-timeline-stage]{display:block;width:100%;height:auto;max-height:200px;background:var(--lt-mist);border-radius:16px;margin-block:20px;color:var(--lt-muted)}
[data-timeline-stage] path{stroke:var(--lt-gold)}
[data-timeline-stage] circle{fill:var(--lt-slate);stroke:var(--lt-gold);transition:cx 260ms ease,cy 260ms ease,r 260ms ease,fill 260ms ease}
[data-timeline-stage] circle:last-child{fill:none}
[data-timeline-stage] [data-current=true]{fill:var(--lt-gold);r:10px}
.lesson-timeline-list{list-style:none;margin:0;padding:0 0 0 16px;border-inline-start:2px solid var(--lt-gold);display:grid;gap:12px}
.lesson-timeline-card{border:1px solid color-mix(in srgb,var(--lt-slate) 20%,transparent);border-radius:12px;background:var(--lt-surface);overflow-wrap:anywhere;transition:background 220ms ease,box-shadow 220ms ease,transform 220ms ease}
.lesson-timeline-card[data-active=true]{background:var(--lt-mist);box-shadow:inset 4px 0 0 var(--lt-gold);transform:translateX(3px)}
[data-lesson-timeline] button{font:inherit;color:inherit;cursor:pointer;min-height:44px;min-width:44px;border:0;background:transparent;border-radius:10px;padding:12px;text-align:start;white-space:normal;overflow-wrap:anywhere}
[data-timeline-step]{width:100%;display:grid;gap:5px}
[data-timeline-step] span{font-size:.75rem;letter-spacing:.05em;color:var(--lt-muted)}
[data-timeline-step] strong{font-size:1rem;font-weight:500;line-height:1.5}
.lesson-timeline-card p{margin:0;padding:0 16px 18px;line-height:1.65;font-size:.95rem}
[data-lesson-timeline] [hidden]{display:none!important}
[data-lesson-timeline] button:focus-visible{outline:3px solid var(--lt-gold);outline-offset:3px}
.lesson-timeline-controls{display:flex;justify-content:space-between;gap:12px}
.lesson-timeline-controls button{border:1px solid var(--lt-gold);flex:0 1 auto}
[data-lesson-timeline] button:disabled{opacity:.45;cursor:default}
.lesson-timeline-status{font-size:.8rem;margin-block:18px;color:var(--lt-muted)}
:root[data-theme=dark] [data-lesson-timeline]{--lt-slate:#e3e4df;--lt-mist:#30343b;--lt-gold:#d7bd83;--lt-muted:#d7bd83;--lt-surface:#25282d}
@media(prefers-color-scheme:dark){:root:not([data-theme=light]) [data-lesson-timeline]{--lt-slate:#e3e4df;--lt-mist:#30343b;--lt-gold:#d7bd83;--lt-muted:#d7bd83;--lt-surface:#25282d}}
[data-lesson-timeline][data-motion=reduced] *, :root[data-motion=reduced] [data-lesson-timeline] *{transition:none!important;animation:none!important}
@media(prefers-reduced-motion:reduce){[data-lesson-timeline] *{transition:none!important;animation:none!important}}
@media(max-width:390px){.lesson-timeline-list{padding-inline-start:9px}.lesson-timeline-card[data-active=true]{transform:none}[data-lesson-timeline]{padding:12px}}