.lesson-player-body video{width:100%;height:100%;border:0;display:block;-o-object-fit:contain;object-fit:contain;background:#000}.lesson-player-body iframe{width:100%;height:100%;border:0;display:block}.lesson-player-body .lesson-player-external{display:flex;align-items:center;justify-content:center;width:100%;height:100%;color:rgba(255,255,255,.9);font-size:14px;word-break:break-all;padding:24px;text-decoration:underline}.lesson-player-body .lesson-player-external:hover{color:#fff}.lesson-player-body .lesson-player-download{position:absolute;right:16px;bottom:16px;background:rgba(0,0,0,.7);color:#fff;padding:8px 14px;border-radius:999px;font-size:12px;text-decoration:none;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.lesson-player-body .video-center-play{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:transparent;border:0;padding:0;cursor:pointer;z-index:5;pointer-events:auto;transition:transform .15s ease,opacity .15s ease}.lesson-player-body .video-center-play:hover{transform:translate(-50%,-50%) scale(1.1)}.lesson-player-body .video-center-play[hidden]{display:none}.lesson-player-body .video-center-play svg{filter:drop-shadow(0 4px 16px rgba(0,0,0,.5))}.lesson-player-body.lesson-body-text .lesson-text-content{padding:22px 26px;font-size:15px;line-height:1.8}.lesson-player-notes-wrap{position:relative;border-top:1px solid var(--border-subtle, rgba(255,255,255,.08))}.lesson-player-notes-wrap[hidden]{display:none}.lesson-notes-fs-btn{position:absolute;top:8px;right:12px;z-index:5;padding:4px 10px;border-radius:6px;border:1px solid rgb(var(--border-subtle));background:rgb(var(--bg-overlay));color:rgb(var(--text-secondary));font-size:12px;cursor:pointer}.lesson-notes-fs-btn:hover{color:rgb(var(--text-primary));border-color:rgb(var(--border-strong))}.lesson-player-notes{padding:16px 20px;max-height:30vh;overflow-y:auto;font-size:14px;line-height:1.7}.lesson-player-notes-wrap.is-fullscreen{position:fixed;top:0;right:0;bottom:0;left:0;z-index:10000;background:rgb(var(--bg-base));border-top:0;display:flex;flex-direction:column}.lesson-player-notes-wrap.is-fullscreen .lesson-player-notes{max-height:none;flex:1;font-size:16px;line-height:1.9;padding:64px max(20px,calc((100vw - 820px)/2)) 80px}.lesson-player-notes-wrap.is-fullscreen .lesson-notes-fs-btn{position:fixed;top:16px;right:20px}details[data-astro-cid-zdo56jxo].course-chapter>summary[data-astro-cid-zdo56jxo]{list-style:none}details[data-astro-cid-zdo56jxo].course-chapter>summary[data-astro-cid-zdo56jxo]::-webkit-details-marker{display:none}details[data-astro-cid-zdo56jxo].course-chapter>summary[data-astro-cid-zdo56jxo]::marker{display:none}details[data-astro-cid-zdo56jxo].course-chapter>summary[data-astro-cid-zdo56jxo] .chevron[data-astro-cid-zdo56jxo]{transition:transform .2s ease}details[data-astro-cid-zdo56jxo].course-chapter[open]>summary[data-astro-cid-zdo56jxo] .chevron[data-astro-cid-zdo56jxo]{transform:rotate(90deg)}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"]{cursor:not-allowed;background:rgba(244,63,94,.04)}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"] .lesson-orb[data-astro-cid-zdo56jxo]{color:rgb(var(--text-muted))}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"] .lesson-type-chip[data-astro-cid-zdo56jxo]{background:rgb(var(--text-muted) / .1);color:rgb(var(--text-muted))}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"] .lesson-title[data-astro-cid-zdo56jxo],.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"] .lesson-title[data-astro-cid-zdo56jxo]:hover{color:rgb(var(--text-muted))}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"] .lesson-duration[data-astro-cid-zdo56jxo]{color:rgb(var(--text-muted) / .7)}.lesson-row[data-astro-cid-zdo56jxo][data-locked="1"]:hover{background:rgba(244,63,94,.06)}:root[data-theme=light] .lesson-row[data-astro-cid-zdo56jxo][data-locked="1"]{background:rgba(244,63,94,.07)}:root[data-theme=light] .lesson-row[data-astro-cid-zdo56jxo][data-locked="1"]:hover{background:rgba(244,63,94,.1)}.locked-next-modal[data-astro-cid-zdo56jxo]{border:0;border-radius:16px;padding:0;max-width:460px;width:calc(100% - 32px);box-shadow:0 20px 60px -10px rgba(0,0,0,.55),0 8px 24px -8px rgb(var(--accent-primary) / .25);background:rgb(var(--bg-elevated));color:rgb(var(--text-primary))}.locked-next-modal[data-astro-cid-zdo56jxo]::-ms-backdrop{background:rgba(0,0,0,.6);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.locked-next-modal[data-astro-cid-zdo56jxo]::backdrop{background:rgba(0,0,0,.6);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.locked-next-card[data-astro-cid-zdo56jxo]{padding:28px 28px 24px;text-align:center;position:relative}.locked-next-close[data-astro-cid-zdo56jxo]{position:absolute;top:14px;right:14px;background:transparent;border:0;color:rgb(var(--text-muted));cursor:pointer;padding:6px;border-radius:6px;transition:background .15s ease,color .15s ease}.locked-next-close[data-astro-cid-zdo56jxo]:hover{background:rgb(var(--bg-overlay));color:rgb(var(--text-primary))}.locked-next-icon[data-astro-cid-zdo56jxo]{display:inline-flex;align-items:center;justify-content:center;width:72px;height:72px;border-radius:50%;background:rgb(var(--accent-primary) / .12);color:rgb(var(--accent-primary));margin:8px auto 14px}.locked-next-title[data-astro-cid-zdo56jxo]{font-family:Manrope,PingFang SC,HarmonyOS Sans SC,Microsoft YaHei UI,sans-serif;font-size:1.25rem;font-weight:600;color:rgb(var(--text-primary));margin:0 0 8px}.locked-next-desc[data-astro-cid-zdo56jxo]{color:rgb(var(--text-secondary));font-size:14px;line-height:1.6;margin:0 0 20px}.locked-next-form[data-astro-cid-zdo56jxo]{display:flex;gap:8px;margin-bottom:12px}.locked-next-input[data-astro-cid-zdo56jxo]{flex:1;height:42px;padding:0 14px;border-radius:8px;background:rgb(var(--bg-base) / .6);border:1px solid rgb(var(--border-subtle));color:rgb(var(--text-primary));font-family:JetBrains Mono,SF Mono,monospace;font-size:14px;letter-spacing:.05em;outline:none;transition:border-color .15s ease,box-shadow .15s ease}.locked-next-input[data-astro-cid-zdo56jxo]::-moz-placeholder{color:rgb(var(--text-muted))}.locked-next-input[data-astro-cid-zdo56jxo]::-ms-input-placeholder{color:rgb(var(--text-muted))}.locked-next-input[data-astro-cid-zdo56jxo]::placeholder{color:rgb(var(--text-muted))}.locked-next-input[data-astro-cid-zdo56jxo]:focus{border-color:rgb(var(--accent-primary));box-shadow:0 0 0 3px rgb(var(--accent-primary) / .15)}.locked-next-submit[data-astro-cid-zdo56jxo]{height:42px;padding:0 18px;border-radius:8px;background:rgb(var(--accent-primary));color:#fff;border:0;font-size:14px;font-weight:500;cursor:pointer;transition:background .15s ease;white-space:nowrap}.locked-next-submit[data-astro-cid-zdo56jxo]:hover:not(:disabled){background:#7d66ee}.locked-next-submit[data-astro-cid-zdo56jxo]:disabled{opacity:.6;cursor:not-allowed}.locked-next-error[data-astro-cid-zdo56jxo]{color:#f43f5e;font-size:13px;margin:4px 0 12px;text-align:left;padding:8px 12px;background:rgba(244,63,94,.08);border-radius:6px;border-left:3px solid rgb(244 63 94)}.locked-next-error[data-astro-cid-zdo56jxo][hidden]{display:none}.locked-next-actions[data-astro-cid-zdo56jxo]{display:flex;flex-direction:column;gap:8px;margin-top:8px;border-top:1px solid rgb(var(--border-subtle) / .5);padding-top:14px}.locked-next-link[data-astro-cid-zdo56jxo]{background:transparent;border:0;color:rgb(var(--text-muted));font-size:13px;cursor:pointer;padding:4px 8px;border-radius:4px;transition:color .15s ease}.locked-next-link[data-astro-cid-zdo56jxo]:hover{color:rgb(var(--text-primary))}:root[data-theme=light] .locked-next-icon[data-astro-cid-zdo56jxo]{background:rgb(var(--accent-primary) / .08)}.school-toast[data-astro-cid-zdo56jxo]{position:fixed;bottom:28px;left:50%;transform:translate(-50%) translateY(12px);z-index:60;padding:12px 20px;border-radius:8px;background:rgb(var(--bg-elevated));color:rgb(var(--text-primary));border:1px solid rgb(var(--accent-primary) / .4);box-shadow:0 12px 40px -8px rgba(0,0,0,.4),0 4px 12px -2px rgb(var(--accent-primary) / .25);font-size:14px;font-weight:500;opacity:0;pointer-events:none;transition:opacity .2s ease,transform .2s ease;max-width:calc(100vw - 32px);text-align:center}.school-toast[data-astro-cid-zdo56jxo].show{opacity:1;transform:translate(-50%) translateY(0)}@keyframes gateFlash{0%,to{box-shadow:0 0 rgb(var(--accent-primary) / 0)}50%{box-shadow:0 0 0 8px rgb(var(--accent-primary) / .18)}}.gate-flash[data-astro-cid-zdo56jxo]{animation:gateFlash 1.4s ease-out}[data-astro-cid-zdo56jxo][data-auth-badge=free],[data-astro-cid-zdo56jxo][data-auth-badge=locked]{display:inline-flex;align-items:center;gap:4px;border-radius:9999px;padding:2px 10px;font-size:10px;text-transform:uppercase;letter-spacing:.05em;white-space:nowrap;border:1px solid}[data-astro-cid-zdo56jxo][data-auth-badge=free]{font-weight:600;border-color:rgba(16,185,129,.45);background:rgba(16,185,129,.2);color:#6ee7b7}[data-astro-cid-zdo56jxo][data-auth-badge=locked]{font-weight:700;border-color:rgba(244,63,94,.55);background:rgba(244,63,94,.22);color:#fda4af}:root[data-theme=light] [data-astro-cid-zdo56jxo][data-auth-badge=free]{border-color:rgba(16,185,129,.55);background:rgba(16,185,129,.14);color:#047857}:root[data-theme=light] [data-astro-cid-zdo56jxo][data-auth-badge=locked]{border-color:rgba(244,63,94,.65);background:rgba(244,63,94,.14);color:#9f1239}.lesson-status-dot[data-astro-cid-zdo56jxo]{border-color:rgb(var(--border-strong));color:transparent;background:transparent;transition:all .15s ease}.lesson-status-dot[data-astro-cid-zdo56jxo] .dot-check[data-astro-cid-zdo56jxo]{opacity:0}[data-astro-cid-zdo56jxo][data-lesson-status=in_progress] .lesson-status-dot[data-astro-cid-zdo56jxo]{background:rgb(var(--accent-primary) / .18);border-color:rgb(var(--accent-primary) / .5);color:rgb(var(--accent-primary))}[data-astro-cid-zdo56jxo][data-lesson-status=in_progress] .lesson-status-dot[data-astro-cid-zdo56jxo]:after{content:"";width:7px;height:7px;border-radius:50%;background:rgb(var(--accent-primary))}[data-astro-cid-zdo56jxo][data-lesson-status=completed] .lesson-status-dot[data-astro-cid-zdo56jxo]{background:#10b981;border-color:#10b981;color:#fff}[data-astro-cid-zdo56jxo][data-lesson-status=completed] .lesson-status-dot[data-astro-cid-zdo56jxo] .dot-check[data-astro-cid-zdo56jxo]{opacity:1}.lesson-row[data-astro-cid-zdo56jxo]:disabled .lesson-pct[data-astro-cid-zdo56jxo],.lesson-row[data-astro-cid-zdo56jxo]:disabled .lesson-status-dot[data-astro-cid-zdo56jxo]{display:none}.lesson-pct[data-astro-cid-zdo56jxo]{color:transparent;transition:color .15s ease;min-width:0}[data-astro-cid-zdo56jxo][data-lesson-status=in_progress] .lesson-pct[data-astro-cid-zdo56jxo]{color:rgb(var(--accent-primary))}[data-astro-cid-zdo56jxo][data-lesson-status=completed] .lesson-pct[data-astro-cid-zdo56jxo]{color:#10b981}:root[data-theme=light] [data-astro-cid-zdo56jxo][data-lesson-status=in_progress] .lesson-pct[data-astro-cid-zdo56jxo]{color:rgb(var(--accent-primary))}:root[data-theme=light] [data-astro-cid-zdo56jxo][data-lesson-status=completed] .lesson-pct[data-astro-cid-zdo56jxo]{color:#047857}.outline-fab[data-astro-cid-zdo56jxo]{position:fixed;bottom:20px;right:20px;z-index:30;display:inline-flex;align-items:center;gap:8px;padding:12px 18px;background:rgb(var(--accent-primary));color:#fff;border:0;border-radius:999px;font-size:14px;font-weight:500;cursor:pointer;box-shadow:0 10px 30px -8px rgba(0,0,0,.55),0 4px 12px -4px rgb(var(--accent-primary) / .4)}.outline-fab[data-astro-cid-zdo56jxo]:active{transform:scale(.96)}dialog[data-astro-cid-zdo56jxo].outline-drawer{position:fixed;inset:auto 0 0 0;margin:0;width:100%;max-width:100%;max-height:78vh;padding:0;border:0;background:transparent;color:inherit}dialog[data-astro-cid-zdo56jxo].outline-drawer::-ms-backdrop{background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}dialog[data-astro-cid-zdo56jxo].outline-drawer::backdrop{background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.outline-drawer-card[data-astro-cid-zdo56jxo]{background:rgb(var(--bg-overlay));border-top:1px solid rgb(var(--border-subtle));border-radius:16px 16px 0 0;max-height:78vh;display:flex;flex-direction:column;overflow:hidden}.outline-drawer-header[data-astro-cid-zdo56jxo]{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:16px 20px;border-bottom:1px solid rgb(var(--border-subtle) / .6)}.outline-drawer-header[data-astro-cid-zdo56jxo] h3[data-astro-cid-zdo56jxo]{font-family:var(--font-headline, inherit);font-size:16px;font-weight:600;color:rgb(var(--text-primary));margin:0}.outline-drawer-header[data-astro-cid-zdo56jxo] button[data-astro-cid-zdo56jxo]{background:transparent;border:0;color:rgb(var(--text-muted));padding:6px;border-radius:999px;cursor:pointer}.outline-drawer-header[data-astro-cid-zdo56jxo] button[data-astro-cid-zdo56jxo]:hover{color:rgb(var(--text-primary));background:rgb(var(--text-primary) / .06)}.outline-drawer-list[data-astro-cid-zdo56jxo]{list-style:none;margin:0;padding:8px 12px 24px;overflow-y:auto}.outline-drawer-list[data-astro-cid-zdo56jxo] .outline-link[data-astro-cid-zdo56jxo]{display:flex;align-items:baseline;gap:10px;padding:12px 8px;border-radius:8px;text-decoration:none;color:rgb(var(--text-secondary));font-size:14px;line-height:1.4}.outline-drawer-list[data-astro-cid-zdo56jxo] .outline-link[data-astro-cid-zdo56jxo]:active{background:rgb(var(--text-primary) / .06)}.lesson-row[data-astro-cid-zdo56jxo] .play-orb[data-astro-cid-zdo56jxo]{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;background:rgb(var(--accent-primary) / .14);color:rgb(var(--accent-lilac));transition:background .18s ease,transform .18s ease}.lesson-row[data-astro-cid-zdo56jxo]:hover .play-orb[data-astro-cid-zdo56jxo]{background:rgb(var(--accent-primary));color:#fff;transform:scale(1.05)}dialog[data-astro-cid-zdo56jxo].lesson-player{padding:0;border:none;background:transparent;color:inherit;max-width:min(96vw,1100px);width:100%;max-height:96vh;border-radius:16px;margin:4vh auto auto}dialog[data-astro-cid-zdo56jxo].lesson-player::-ms-backdrop{background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}dialog[data-astro-cid-zdo56jxo].lesson-player::backdrop{background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.lesson-player-card[data-astro-cid-zdo56jxo]{background:rgb(var(--bg-overlay));border:1px solid rgb(var(--border-subtle));border-radius:16px;box-shadow:0 30px 70px -20px rgba(0,0,0,.55);overflow:hidden;display:flex;flex-direction:column}.lesson-player-header[data-astro-cid-zdo56jxo]{display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;padding:1.5rem 1.75rem;border-bottom:1px solid rgb(var(--border-subtle) / .6)}.lesson-player-eyebrow[data-astro-cid-zdo56jxo]{font-size:11px;text-transform:uppercase;letter-spacing:.2em;color:rgb(var(--text-muted))}.lesson-player-title[data-astro-cid-zdo56jxo]{margin-top:6px;font-family:var(--font-headline, inherit);font-size:18px;font-weight:600;color:rgb(var(--text-primary))}.lesson-player-close[data-astro-cid-zdo56jxo]{color:rgb(var(--text-muted));background:transparent;border:none;border-radius:999px;padding:6px;cursor:pointer;transition:background .15s ease,color .15s ease}.lesson-player-close[data-astro-cid-zdo56jxo]:hover{background:rgb(var(--text-primary) / .08);color:rgb(var(--text-primary))}.lesson-player-body[data-astro-cid-zdo56jxo]{background:#000;width:100%;aspect-ratio:16 / 9;max-height:70vh;position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center}.lesson-player-body[data-astro-cid-zdo56jxo].lesson-body-text{aspect-ratio:auto;background:rgb(var(--bg-overlay));min-height:200px;max-height:68vh;overflow-y:auto;overflow-x:hidden;display:block}.lesson-player-footer[data-astro-cid-zdo56jxo]{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 1.5rem;border-top:1px solid rgb(var(--border-subtle) / .6)}.lesson-player-nav[data-astro-cid-zdo56jxo]{display:inline-flex;align-items:center;gap:6px;background:transparent;border:1px solid rgb(var(--border-subtle));border-radius:999px;padding:6px 14px;color:rgb(var(--text-secondary));font-size:13px;cursor:pointer;transition:background .15s ease,color .15s ease,border-color .15s ease}.lesson-player-nav[data-astro-cid-zdo56jxo]:hover{color:rgb(var(--text-primary));border-color:rgb(var(--text-primary) / .3);background:rgb(var(--text-primary) / .04)}.lesson-player-progress[data-astro-cid-zdo56jxo]{font-size:12px;color:rgb(var(--text-muted))}