.page[data-astro-cid-wrtbqo74]{padding:0 clamp(24px,5vw,64px) clamp(64px,8vw,104px)}.wrap[data-astro-cid-wrtbqo74]{max-width:var(--container);margin:0 auto}.crumbs[data-astro-cid-wrtbqo74]{display:flex;gap:10px;padding:24px 0 0;font-family:var(--font-body);font-size:12.5px;color:var(--node-ash-50)}.crumbs[data-astro-cid-wrtbqo74] a[data-astro-cid-wrtbqo74]{color:var(--node-ash-50);text-decoration:none}.crumbs[data-astro-cid-wrtbqo74] a[data-astro-cid-wrtbqo74]:hover{color:var(--node-spectrum)}.lesson-topbar[data-astro-cid-wrtbqo74]{position:sticky;top:0;z-index:90;height:4px;background:var(--node-progress-track)}.lesson-topbar-fill[data-astro-cid-wrtbqo74]{display:block;height:100%;background:var(--node-progress-fill)}.course-head[data-astro-cid-wrtbqo74]{padding:20px 0 28px}.course-head[data-astro-cid-wrtbqo74] .g-badge[data-astro-cid-wrtbqo74]{margin-bottom:12px}.h1[data-astro-cid-wrtbqo74]{font-family:var(--font-rounded);font-weight:800;letter-spacing:.005em;font-size:clamp(22px,3vw,33px);line-height:1.45;margin:10px 0 12px;color:var(--node-ink);word-break:auto-phrase}.course-head[data-astro-cid-wrtbqo74] .g-badge[data-astro-cid-wrtbqo74]{display:inline-flex}.course-head-meta[data-astro-cid-wrtbqo74]{display:flex;flex-wrap:wrap;gap:10px;font-family:var(--font-body);font-size:13px;color:var(--node-ash-50)}.dot[data-astro-cid-wrtbqo74]{opacity:.5}.lesson-grid[data-astro-cid-wrtbqo74]{display:grid;grid-template-columns:1fr;gap:40px;align-items:start}@media(min-width:1000px){.lesson-grid[data-astro-cid-wrtbqo74]{grid-template-columns:minmax(0,1fr) 340px;gap:56px}}.player[data-astro-cid-wrtbqo74]{background:#101216;border-radius:var(--radius-lg);overflow:hidden;color:#ffffffd9;border:1px solid var(--node-ash-20)}.player-inner[data-astro-cid-wrtbqo74]{aspect-ratio:16 / 9;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;position:relative}.player-chapter[data-astro-cid-wrtbqo74]{font-family:var(--font-mono);font-size:11px;letter-spacing:.14em;color:#ffffff8c}.player-play[data-astro-cid-wrtbqo74]{width:74px;height:74px;border-radius:50%;border:0;background:var(--node-spectrum-fill);color:#0a0a0a;font-size:22px;padding-left:6px;cursor:pointer;transition:transform var(--dur-fast) var(--ease)}.player-play[data-astro-cid-wrtbqo74]:hover{transform:scale(1.06)}.player-bar[data-astro-cid-wrtbqo74]{height:5px;background:#ffffff24}.player-progress[data-astro-cid-wrtbqo74]{display:block;height:100%;background:var(--node-spectrum-fill)}.player-time[data-astro-cid-wrtbqo74]{display:flex;justify-content:space-between;padding:10px 16px 12px;font-family:var(--font-mono);font-size:11px;color:#ffffff8c}.block[data-astro-cid-wrtbqo74]{padding:36px 0 0}.block-title[data-astro-cid-wrtbqo74]{font-family:var(--font-rounded);font-size:19px;font-weight:800;letter-spacing:.005em;margin:0 0 14px;color:var(--node-ink)}.block-body[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:14.5px;line-height:2;color:var(--node-ash-50);margin:0 0 18px;max-width:72ch}.block-note[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:13px;color:var(--node-ash-50);margin:0 0 14px}.dl-row[data-astro-cid-wrtbqo74]{display:flex;flex-wrap:wrap;gap:10px}.dl-row--after-bubble[data-astro-cid-wrtbqo74]{margin-top:18px}.dl-chip[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:13px;font-weight:600;color:var(--node-ink);text-decoration:none;border:1px solid var(--node-ash-20);border-radius:var(--radius-pill);padding:10px 18px;transition:border-color var(--dur-fast) var(--ease)}.dl-chip[data-astro-cid-wrtbqo74]:hover{border-color:var(--node-ink)}.ref-list[data-astro-cid-wrtbqo74]{list-style:none;margin:0;padding:0;border-top:1px solid var(--node-ash-20);max-width:640px}.ref-row[data-astro-cid-wrtbqo74]{display:flex;flex-wrap:wrap;gap:6px 16px;align-items:baseline;padding:14px 4px;border-bottom:1px solid var(--node-ash-20)}.ref-source[data-astro-cid-wrtbqo74]{font-family:var(--font-mono);font-size:10.5px;letter-spacing:.08em;color:var(--node-ash-50);flex:0 0 84px}.ref-link[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--node-ink);text-decoration:none}.ref-link[data-astro-cid-wrtbqo74]:hover{color:var(--node-spectrum)}.block--task[data-astro-cid-wrtbqo74]{margin-top:36px;padding:28px;background:var(--node-cream);border-radius:var(--radius-lg);scroll-margin-top:88px}.task-head[data-astro-cid-wrtbqo74]{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}.pill[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:11px;font-weight:700;border-radius:var(--radius-pill);padding:5px 12px;white-space:nowrap}.pill-wait[data-astro-cid-wrtbqo74]{background:var(--node-ash-08);color:var(--node-ash-50);border:1px solid var(--node-ash-20)}.task-form[data-astro-cid-wrtbqo74]{display:grid;gap:16px;max-width:640px}.field[data-astro-cid-wrtbqo74]{display:grid;gap:7px}.field-label[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:12.5px;font-weight:700;color:var(--node-ink)}.field-input[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:14px;color:var(--node-ink);background:var(--node-paper);border:1.5px solid var(--node-ash-20);border-radius:var(--radius);padding:13px 16px}.field-input[data-astro-cid-wrtbqo74]::placeholder{color:var(--node-ash-50);opacity:.7}.field-textarea[data-astro-cid-wrtbqo74]{resize:vertical}.btn[data-astro-cid-wrtbqo74]{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 26px;border-radius:var(--radius-pill);font-family:var(--font-body);font-size:14px;font-weight:700;text-decoration:none;border:1.5px solid transparent;cursor:pointer}.btn-solid[data-astro-cid-wrtbqo74]{background:var(--node-ink);color:var(--node-paper);border-color:var(--node-ink);justify-self:start}.btn-solid[data-astro-cid-wrtbqo74]:disabled{opacity:.45;cursor:not-allowed}.btn-line[data-astro-cid-wrtbqo74]{background:transparent;color:var(--node-ink);border-color:var(--node-ash-20)}.btn-line[data-astro-cid-wrtbqo74]:hover{border-color:var(--node-ink)}.lab-list[data-astro-cid-wrtbqo74]{list-style:none;margin:0;padding:0;display:grid;gap:8px}.lab-link[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:14px;font-weight:600;color:var(--node-ink);text-decoration:none;line-height:1.7}.lab-link[data-astro-cid-wrtbqo74]:hover{color:var(--node-spectrum)}.side-sticky[data-astro-cid-wrtbqo74]{position:sticky;top:88px}.side-head[data-astro-cid-wrtbqo74]{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:14px}.side-label[data-astro-cid-wrtbqo74]{font-family:var(--font-rounded);font-size:13.5px;font-weight:800;color:var(--node-ink)}.side-count[data-astro-cid-wrtbqo74]{font-family:var(--font-mono);font-size:11px;color:var(--node-ink)}.chap-list[data-astro-cid-wrtbqo74]{list-style:none;margin:0 0 16px;padding:0;border:1.5px solid var(--node-ash-20);border-radius:var(--radius-lg);overflow:hidden;background:var(--node-paper)}.chap[data-astro-cid-wrtbqo74]{display:flex;gap:14px;align-items:center;padding:15px 18px;border-bottom:1px solid var(--node-ash-20)}.chap[data-astro-cid-wrtbqo74]:last-child{border-bottom:0}.chap--current[data-astro-cid-wrtbqo74]{background:var(--node-spectrum-faint)}.chap--task[data-astro-cid-wrtbqo74]{border-top:1.5px dashed var(--node-ash-20)}.chap-mark[data-astro-cid-wrtbqo74]{flex:0 0 26px;height:26px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;font-family:var(--font-mono);font-size:11px;border:1.5px solid var(--node-ash-20);color:var(--node-ash-50)}.chap--done[data-astro-cid-wrtbqo74] .chap-mark[data-astro-cid-wrtbqo74]{background:var(--node-spectrum-fill);border-color:var(--node-spectrum-fill);color:var(--node-on-spectrum)}.chap--current[data-astro-cid-wrtbqo74] .chap-mark[data-astro-cid-wrtbqo74]{background:var(--node-ink);border-color:var(--node-ink);color:var(--node-paper)}.chap-body[data-astro-cid-wrtbqo74]{display:flex;flex-direction:column;gap:2px;min-width:0}.chap-title[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:13.5px;font-weight:600;color:var(--node-ink);line-height:1.5}.chap--todo[data-astro-cid-wrtbqo74] .chap-title[data-astro-cid-wrtbqo74]{color:var(--node-ash-50)}.chap-len[data-astro-cid-wrtbqo74]{font-family:var(--font-mono);font-size:10.5px;color:var(--node-ash-50)}.side-task-cta[data-astro-cid-wrtbqo74]{display:block;text-align:center;font-family:var(--font-body);font-size:13.5px;font-weight:700;color:var(--node-ink);text-decoration:none;border:1.5px solid var(--node-ash-20);border-radius:var(--radius-pill);padding:12px;transition:border-color var(--dur-fast) var(--ease),color var(--dur-fast) var(--ease)}.side-task-cta[data-astro-cid-wrtbqo74]:hover{border-color:var(--node-spectrum);color:var(--node-spectrum)}.next[data-astro-cid-wrtbqo74]{margin-top:clamp(48px,7vw,80px)}.next-inner[data-astro-cid-wrtbqo74]{display:grid;grid-template-columns:1fr;gap:24px;align-items:center;padding:32px;background:var(--node-cream);border-radius:var(--radius-lg)}@media(min-width:900px){.next-inner[data-astro-cid-wrtbqo74]{grid-template-columns:1fr auto;gap:48px}}.next-title[data-astro-cid-wrtbqo74]{font-family:var(--font-rounded);font-size:22px;font-weight:800;margin:0 0 10px;color:var(--node-ink)}.next-body[data-astro-cid-wrtbqo74]{font-family:var(--font-body);font-size:14px;line-height:1.95;color:var(--node-ash-50);margin:0;max-width:640px}