.lesson[data-astro-cid-zevzaw45]{flex-wrap:wrap;align-items:flex-start;gap:24px;padding-top:8px;padding-bottom:64px;display:flex}.main[data-astro-cid-zevzaw45]{flex-direction:column;flex:999 560px;gap:24px;min-width:0;display:flex}.player[data-astro-cid-zevzaw45]{aspect-ratio:16/9;background:var(--dark);border-radius:24px;justify-content:center;align-items:center;display:flex;position:relative}.play[data-astro-cid-zevzaw45]{background:var(--on-dark);width:80px;height:80px;color:var(--dark);cursor:pointer;border:none;border-radius:999px;justify-content:center;align-items:center;display:flex}.player-tag[data-astro-cid-zevzaw45]{color:var(--on-dark-muted);font-size:14px;font-weight:700;position:absolute;bottom:20px;left:24px}.head[data-astro-cid-zevzaw45]{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:16px;display:flex}.head-text[data-astro-cid-zevzaw45]{flex-direction:column;gap:8px;min-width:0;display:flex}.eyebrow[data-astro-cid-zevzaw45]{color:var(--muted);font-size:15px;font-weight:700}h1[data-astro-cid-zevzaw45]{font-size:clamp(26px,3vw,36px);line-height:1.15}.head-actions[data-astro-cid-zevzaw45]{flex-wrap:wrap;gap:10px;display:flex}.head-actions[data-astro-cid-zevzaw45] [data-astro-cid-zevzaw45][hidden]{display:none}.btn-soft[data-astro-cid-zevzaw45].is-done{background:var(--success-bg);color:var(--success-ink)}.segmented[data-astro-cid-zevzaw45]{border-radius:var(--radius-m);background:var(--fill-2);align-self:flex-start;gap:4px;padding:4px;display:flex}.segmented[data-astro-cid-zevzaw45] button[data-astro-cid-zevzaw45]{border-radius:var(--radius-s);min-height:44px;color:var(--ink);font:inherit;cursor:pointer;background:0 0;border:none;padding:0 18px;font-size:15px;font-weight:700}.segmented[data-astro-cid-zevzaw45] button[data-astro-cid-zevzaw45][aria-pressed=true]{background:var(--surface)}.materials-title[data-astro-cid-zevzaw45]{letter-spacing:0;margin-bottom:12px;font-size:20px}.material[data-astro-cid-zevzaw45]{background:var(--fill);min-height:72px;color:var(--accent);font:inherit;text-align:left;cursor:pointer;border:none;border-radius:18px;align-items:center;gap:14px;padding:16px 20px;display:flex}.material[data-astro-cid-zevzaw45] span[data-astro-cid-zevzaw45]{color:var(--ink);flex:1;font-size:16px;font-weight:700}.material[data-astro-cid-zevzaw45]>svg:last-child{color:var(--muted)}.side[data-astro-cid-zevzaw45]{background:var(--fill);border-radius:24px;flex-direction:column;flex:320px;gap:20px;min-width:0;padding:24px;display:flex}.side-head[data-astro-cid-zevzaw45]{flex-direction:column;gap:12px;display:flex}.course-name[data-astro-cid-zevzaw45]{font-size:20px;font-weight:800}.progress-row[data-astro-cid-zevzaw45]{align-items:center;gap:12px;display:flex}.progress[data-astro-cid-zevzaw45]{background:var(--fill-3);border-radius:999px;flex:1;height:8px;overflow:hidden}.progress-fill[data-astro-cid-zevzaw45]{background:var(--accent);border-radius:999px;width:0;height:100%;transition:width .25s}.progress-count[data-astro-cid-zevzaw45]{color:var(--muted);font-size:14px;font-weight:700}.list[data-astro-cid-zevzaw45]{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.item[data-astro-cid-zevzaw45]{border-radius:var(--radius-m);width:100%;min-height:52px;color:var(--ink);font:inherit;text-align:left;cursor:pointer;background:0 0;border:none;align-items:center;gap:12px;padding:8px 12px;display:flex}.item[data-astro-cid-zevzaw45]:hover{background:var(--fill-2)}.item[data-astro-cid-zevzaw45][aria-current=true]{background:var(--surface)}.num[data-astro-cid-zevzaw45]{background:var(--fill-3);width:30px;height:30px;color:var(--accent-ink);border-radius:999px;flex:none;justify-content:center;align-items:center;font-size:13px;font-weight:800;display:flex}.num[data-astro-cid-zevzaw45] [data-astro-cid-zevzaw45][hidden]{display:none}.item[data-astro-cid-zevzaw45].is-done .num[data-astro-cid-zevzaw45]{background:var(--success-bg);color:var(--success-ink)}.item-text[data-astro-cid-zevzaw45]{flex-direction:column;flex:1;gap:2px;min-width:0;display:flex}.item-title[data-astro-cid-zevzaw45]{font-size:15px;font-weight:700}.item-skill[data-astro-cid-zevzaw45]{color:var(--muted);font-size:13px;font-weight:600}