.Board-module-scss-module__AJpKHa__plane{background:var(--b-bg);box-shadow:0 0 0 1px var(--b-edge),0 2px 0 #ffffff0f inset,0 40px 90px -34px var(--b-shadow),0 18px 40px -24px var(--b-shadow);transform-origin:50% 55%;will-change:transform;border-radius:26px;position:absolute;inset:0;overflow:hidden}.Board-module-scss-module__AJpKHa__plane:after{content:"";pointer-events:none;background:linear-gradient(125deg,#ffffff12 0%,#0000 35% 70%,#0000000d 100%);position:absolute;inset:0}.Board-module-scss-module__AJpKHa__svg{-webkit-user-select:none;user-select:none;width:100%;height:100%;display:block}.Board-module-scss-module__AJpKHa__svg text{dominant-baseline:alphabetic}.Board-module-scss-module__AJpKHa__stroke path{fill:none;stroke-linecap:round;stroke-linejoin:round}.Board-module-scss-module__AJpKHa__dashed{stroke-dasharray:9 9}.Board-module-scss-module__AJpKHa__emphasis{transform-box:fill-box;transform-origin:50%}.Board-module-scss-module__AJpKHa__pop{animation:.55s cubic-bezier(.34,1.56,.64,1) Board-module-scss-module__AJpKHa__pop}@keyframes Board-module-scss-module__AJpKHa__pop{0%{transform:scale(1)}40%{transform:scale(1.12)}to{transform:scale(1)}}.Board-module-scss-module__AJpKHa__nib{opacity:0;pointer-events:none;mix-blend-mode:screen;transition:opacity .2s}.Board-module-scss-module__AJpKHa__gridDot{fill:var(--b-grid)}.Board-module-scss-module__AJpKHa__gridMinor{fill:none;stroke:var(--b-grid);stroke-width:1px}.Board-module-scss-module__AJpKHa__gridMajor{fill:none;stroke:var(--b-grid-major);stroke-width:1.4px}.Board-module-scss-module__AJpKHa__pageFrame{fill:none;stroke:var(--b-grid-major);stroke-width:6px;stroke-dasharray:18 14}@media (prefers-reduced-motion:reduce){.Board-module-scss-module__AJpKHa__pop{animation:none}}
.LessonPlayer-module-scss-module__P2W5-W__page{--glass:color-mix(in srgb, var(--ds-surface-card) 78%, transparent);--glass-edge:color-mix(in srgb, var(--ds-text-primary) 9%, transparent);--glass-shadow:#0a0a1459;--floor-line:#09090b12;--glow-a:#ef444429;--glow-b:#3b82f61f;z-index:60;isolation:isolate;background:var(--ds-surface-page);color:var(--ds-text-primary);font-family:var(--font-dm-sans,"DM Sans"),system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;flex-direction:column;gap:12px;padding:14px clamp(12px,2vw,28px);display:flex;position:fixed;inset:0;overflow:hidden}:root[data-theme=dark] .LessonPlayer-module-scss-module__P2W5-W__page{--glass-shadow:#000000b3;--floor-line:#ffffff0f;--glow-a:#ef444438;--glow-b:#3b82f629}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .LessonPlayer-module-scss-module__P2W5-W__page{--glass-shadow:#000000b3;--floor-line:#ffffff0f;--glow-a:#ef444438;--glow-b:#3b82f629}}.LessonPlayer-module-scss-module__P2W5-W__ambient{z-index:-1;background:radial-gradient(55% 45% at 88% 100%, var(--glow-a), transparent 70%),radial-gradient(45% 40% at 6% 0%, var(--glow-b), transparent 70%);pointer-events:none;position:absolute;inset:0}.LessonPlayer-module-scss-module__P2W5-W__ambient:after{content:"";background-image:linear-gradient(var(--floor-line) 1px, transparent 1px),linear-gradient(90deg, var(--floor-line) 1px, transparent 1px);transform-origin:50% 100%;background-size:64px 64px;height:55%;animation:14s linear infinite LessonPlayer-module-scss-module__P2W5-W__floor;position:absolute;bottom:-12%;left:-25%;right:-25%;transform:perspective(700px)rotateX(64deg);-webkit-mask-image:linear-gradient(#0000 15%,#000 85%);mask-image:linear-gradient(#0000 15%,#000 85%)}@keyframes LessonPlayer-module-scss-module__P2W5-W__floor{to{background-position:0 64px}}.LessonPlayer-module-scss-module__P2W5-W__endReopen,.LessonPlayer-module-scss-module__P2W5-W__endClose,.LessonPlayer-module-scss-module__P2W5-W__chipReset,.LessonPlayer-module-scss-module__P2W5-W__chip,.LessonPlayer-module-scss-module__P2W5-W__taskOption,.LessonPlayer-module-scss-module__P2W5-W__startButton,.LessonPlayer-module-scss-module__P2W5-W__playButton,.LessonPlayer-module-scss-module__P2W5-W__secondaryButton,.LessonPlayer-module-scss-module__P2W5-W__primaryButton,.LessonPlayer-module-scss-module__P2W5-W__iconButton{border:1px solid var(--ds-border-subtle);background:var(--ds-surface-card);color:var(--ds-text-primary);font:inherit;cursor:pointer;justify-content:center;align-items:center;gap:8px;text-decoration:none;transition:background-color .15s,border-color .15s,transform .15s,box-shadow .2s;display:inline-flex}.LessonPlayer-module-scss-module__P2W5-W__endReopen:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__endClose:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__chipReset:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__chip:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__taskOption:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__startButton:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__playButton:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__secondaryButton:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__primaryButton:hover:not(:disabled),.LessonPlayer-module-scss-module__P2W5-W__iconButton:hover:not(:disabled){border-color:var(--ds-border-default);background:var(--ds-surface-muted)}.LessonPlayer-module-scss-module__P2W5-W__endReopen:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__endClose:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__chipReset:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__chip:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__taskOption:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__startButton:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__playButton:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__secondaryButton:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__primaryButton:focus-visible,.LessonPlayer-module-scss-module__P2W5-W__iconButton:focus-visible{outline:2px solid var(--ds-focus-ring);outline-offset:2px}.LessonPlayer-module-scss-module__P2W5-W__endReopen:disabled,.LessonPlayer-module-scss-module__P2W5-W__endClose:disabled,.LessonPlayer-module-scss-module__P2W5-W__chipReset:disabled,.LessonPlayer-module-scss-module__P2W5-W__chip:disabled,.LessonPlayer-module-scss-module__P2W5-W__taskOption:disabled,.LessonPlayer-module-scss-module__P2W5-W__startButton:disabled,.LessonPlayer-module-scss-module__P2W5-W__playButton:disabled,.LessonPlayer-module-scss-module__P2W5-W__secondaryButton:disabled,.LessonPlayer-module-scss-module__P2W5-W__primaryButton:disabled,.LessonPlayer-module-scss-module__P2W5-W__iconButton:disabled{cursor:default;opacity:.4}.LessonPlayer-module-scss-module__P2W5-W__endReopen svg,.LessonPlayer-module-scss-module__P2W5-W__endClose svg,.LessonPlayer-module-scss-module__P2W5-W__chipReset svg,.LessonPlayer-module-scss-module__P2W5-W__chip svg,.LessonPlayer-module-scss-module__P2W5-W__taskOption svg,.LessonPlayer-module-scss-module__P2W5-W__startButton svg,.LessonPlayer-module-scss-module__P2W5-W__playButton svg,.LessonPlayer-module-scss-module__P2W5-W__secondaryButton svg,.LessonPlayer-module-scss-module__P2W5-W__primaryButton svg,.LessonPlayer-module-scss-module__P2W5-W__iconButton svg{flex:none;width:18px;height:18px}.LessonPlayer-module-scss-module__P2W5-W__iconButton{border-radius:14px;flex:none;width:44px;height:44px;padding:0}.LessonPlayer-module-scss-module__P2W5-W__speedButton{font-variant-numeric:tabular-nums;font-size:14px;font-weight:800}.LessonPlayer-module-scss-module__P2W5-W__primaryButton{background:var(--ds-accent);height:44px;color:var(--ds-text-on-accent);border:0;border-radius:12px;padding:0 18px;font-weight:700}.LessonPlayer-module-scss-module__P2W5-W__primaryButton:hover:not(:disabled){background:var(--ds-accent-hover)}.LessonPlayer-module-scss-module__P2W5-W__secondaryButton{border-radius:12px;height:44px;padding:0 16px;font-size:15px;font-weight:700}.LessonPlayer-module-scss-module__P2W5-W__srOnly{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.LessonPlayer-module-scss-module__P2W5-W__top{align-items:center;gap:12px;min-width:0;display:flex}.LessonPlayer-module-scss-module__P2W5-W__titleBlock{flex:1;min-width:0}.LessonPlayer-module-scss-module__P2W5-W__title{font-family:var(--font-plus-jakarta-sans,"Plus Jakarta Sans"),-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter",system-ui,sans-serif;text-overflow:ellipsis;white-space:nowrap;margin:0;font-size:clamp(16px,1.6vw,20px);font-weight:800;line-height:1.2;overflow:hidden}.LessonPlayer-module-scss-module__P2W5-W__chapter{color:var(--ds-accent);text-overflow:ellipsis;white-space:nowrap;margin:2px 0 0;font-size:13px;font-weight:700;overflow:hidden}.LessonPlayer-module-scss-module__P2W5-W__counter{border:1px solid var(--glass-edge);background:var(--glass);box-shadow:0 18px 50px -24px 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6px;min-height:0;display:grid;position:relative}.LessonPlayer-module-scss-module__P2W5-W__stage[data-bg=chalk]{--b-bg:#1f3a2f;--b-ink:#f5f5ef;--b-blue:#a5d8ff;--b-red:#ffa8a8;--b-green:#b2f2bb;--b-amber:#ffe066;--b-purple:#e5dbff;--b-muted:#c3cfc8;--b-hl:#ffe0663d;--b-tint:#a5d8ff1f;--b-grid:#ffffff14;--b-grid-major:#ffffff29;--b-edge:#7850288c;--b-shadow:#000000b3}@media (max-width:900px){.LessonPlayer-module-scss-module__P2W5-W__stage{grid-template-columns:minmax(0,1fr);grid-template-areas:"board""caption"}}:root[data-theme=dark] .LessonPlayer-module-scss-module__P2W5-W__stage:not([data-bg=chalk]){--b-bg:#17171b;--b-ink:#f4f4f5;--b-blue:#60a5fa;--b-red:#f87171;--b-green:#4ade80;--b-amber:#fbbf24;--b-purple:#c4b5fd;--b-muted:#a1a1aa;--b-hl:#facc154d;--b-tint:#60a5fa24;--b-grid:#2c2c32;--b-grid-major:#3b3b43;--b-edge:#ffffff14;--b-shadow:#000c}@media (prefers-color-scheme:dark){:root:not([data-theme=light]) .LessonPlayer-module-scss-module__P2W5-W__stage:not([data-bg=chalk]){--b-bg:#17171b;--b-ink:#f4f4f5;--b-blue:#60a5fa;--b-red:#f87171;--b-green:#4ade80;--b-amber:#fbbf24;--b-purple:#c4b5fd;--b-muted:#a1a1aa;--b-hl:#facc154d;--b-tint:#60a5fa24;--b-grid:#2c2c32;--b-grid-major:#3b3b43;--b-edge:#ffffff14;--b-shadow:#000c}}.LessonPlayer-module-scss-module__P2W5-W__frame{z-index:1;perspective:1800px;perspective-origin:50% 45%;grid-area:board;min-height:0;position:relative}.LessonPlayer-module-scss-module__P2W5-W__teacherSpot{pointer-events:none;grid-area:teacher;place-self:end center;width:100%;height:min(60%,380px)}@media (max-width:900px){.LessonPlayer-module-scss-module__P2W5-W__teacherSpot{grid-area:board;justify-self:end;width:96px;height:128px;margin:0 2px -14px 0}}.LessonPlayer-module-scss-module__P2W5-W__stage3d{z-index:2;pointer-events:none;width:100%;height:100%;position:absolute;inset:0}.LessonPlayer-module-scss-module__P2W5-W__overlays{z-index:3;pointer-events:none;grid-area:board;min-height:0;position:relative}.LessonPlayer-module-scss-module__P2W5-W__overlays>*{pointer-events:auto}.LessonPlayer-module-scss-module__P2W5-W__overviewButton{border:1px solid var(--glass-edge);background:var(--glass);box-shadow:0 18px 50px -24px var(--glass-shadow);-webkit-backdrop-filter:blur(16px)saturate(1.3);backdrop-filter:blur(16px)saturate(1.3);position:absolute;top:14px;right:14px}.LessonPlayer-module-scss-module__P2W5-W__captionArea{z-index:3;grid-area:caption;position:relative}.LessonPlayer-module-scss-module__P2W5-W__caption{border:1px solid var(--glass-edge);background:var(--glass);box-shadow:0 18px 50px -24px var(--glass-shadow);-webkit-backdrop-filter:blur(16px)saturate(1.3);backdrop-filter:blur(16px)saturate(1.3);text-align:center;border-radius:20px;min-height:calc(3.1em + 24px);margin:0;padding:12px 22px;font-size:clamp(15px,1.35vw,20px);line-height:1.55;position:relative}.LessonPlayer-module-scss-module__P2W5-W__caption:empty{visibility:hidden}@media (min-width:901px){.LessonPlayer-module-scss-module__P2W5-W__caption:after{content:"";border-top:1px solid var(--glass-edge);border-right:1px solid var(--glass-edge);background:var(--ds-surface-card);width:18px;height:18px;position:absolute;bottom:22px;right:-9px;transform:rotate(45deg)skew(10deg,10deg)}}.LessonPlayer-module-scss-module__P2W5-W__wordNext{color:var(--ds-text-tertiary);transition:color .25s}.LessonPlayer-module-scss-module__P2W5-W__wordSaid{color:var(--ds-text-primary);transition:color .25s}.LessonPlayer-module-scss-module__P2W5-W__wordNow{background:color-mix(in srgb, var(--ds-accent) 16%, transparent);box-shadow:0 0 0 3px color-mix(in srgb, var(--ds-accent) 16%, transparent);color:var(--ds-accent);border-radius:6px}.LessonPlayer-module-scss-module__P2W5-W__dock{border:1px solid var(--glass-edge);background:var(--glass);box-shadow:0 18px 50px -24px var(--glass-shadow);-webkit-backdrop-filter:blur(16px)saturate(1.3);backdrop-filter:blur(16px)saturate(1.3);z-index:4;border-radius:24px;align-items:center;gap:14px;width:min(100%,1180px);margin:0 auto;padding:8px 12px;display:flex;position:relative}@media (max-width:600px){.LessonPlayer-module-scss-module__P2W5-W__dock{flex-wrap:wrap;justify-content:space-between;gap:4px 8px}.LessonPlayer-module-scss-module__P2W5-W__dock .LessonPlayer-module-scss-module__P2W5-W__iconButton{width:40px;height:40px}.LessonPlayer-module-scss-module__P2W5-W__dock .LessonPlayer-module-scss-module__P2W5-W__playButton{width:50px;height:50px}}.LessonPlayer-module-scss-module__P2W5-W__transport,.LessonPlayer-module-scss-module__P2W5-W__tools{flex:none;align-items:center;gap:6px;display:flex}.LessonPlayer-module-scss-module__P2W5-W__playButton{background:var(--ds-accent);width:56px;height:56px;color:var(--ds-text-on-accent);box-shadow:0 8px 22px -6px color-mix(in srgb, var(--ds-accent) 70%, transparent);border:0;border-radius:50%;flex:none}.LessonPlayer-module-scss-module__P2W5-W__playButton:hover:not(:disabled){background:var(--ds-accent-hover);transform:scale(1.04)}.LessonPlayer-module-scss-module__P2W5-W__playButton svg{width:24px;height:24px}.LessonPlayer-module-scss-module__P2W5-W__playing{animation:2.2s ease-in-out infinite LessonPlayer-module-scss-module__P2W5-W__breathe}@keyframes LessonPlayer-module-scss-module__P2W5-W__breathe{0%,to{box-shadow:0 0 0 0 color-mix(in srgb, var(--ds-accent) 45%, transparent)}50%{box-shadow:0 0 0 10px color-mix(in srgb, var(--ds-accent) 0%, transparent)}}.LessonPlayer-module-scss-module__P2W5-W__segments{flex:1;gap:5px;min-width:0;display:flex}@media (max-width:600px){.LessonPlayer-module-scss-module__P2W5-W__segments{flex-basis:100%;order:-1}}.LessonPlayer-module-scss-module__P2W5-W__segment{cursor:pointer;background:0 0;border:0;flex:1;height:26px;padding:0;position:relative}.LessonPlayer-module-scss-module__P2W5-W__segment:before{content:"";background:var(--ds-surface-muted);border-radius:100px;position:absolute;inset:9px 0}.LessonPlayer-module-scss-module__P2W5-W__segment:disabled{cursor:default;opacity:.5}.LessonPlayer-module-scss-module__P2W5-W__segment:focus-visible{outline:2px solid var(--ds-focus-ring);outline-offset:1px;border-radius:6px}.LessonPlayer-module-scss-module__P2W5-W__segmentTask:after{content:"";background:var(--ds-warning);width:6px;height:6px;position:absolute;top:1px;left:50%;transform:translate(-50%)rotate(45deg)}.LessonPlayer-module-scss-module__P2W5-W__segmentFill{background:linear-gradient(90deg, var(--ds-accent), #f97316);transform-origin:0;border-radius:100px;position:absolute;inset:9px 0}.LessonPlayer-module-scss-module__P2W5-W__bgWrap{position:relative}.LessonPlayer-module-scss-module__P2W5-W__bgMenu{border:1px solid var(--ds-border-subtle);background:var(--ds-surface-card);min-width:170px;box-shadow:var(--ds-shadow-lg);border-radius:14px;gap:2px;padding:6px;display:grid;position:absolute;bottom:calc(100% + 10px);right:0}.LessonPlayer-module-scss-module__P2W5-W__bgOption{min-height:40px;color:var(--ds-text-primary);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-radius:10px;align-items:center;gap:10px;padding:0 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0}.LessonPlayer-module-scss-module__P2W5-W__overlayInner{justify-items:center;gap:12px;max-width:420px;display:grid}.LessonPlayer-module-scss-module__P2W5-W__overlayHint{color:var(--ds-text-secondary);margin:0;font-size:15px}.LessonPlayer-module-scss-module__P2W5-W__waitingTitle{color:var(--b-ink);font-family:var(--font-plus-jakarta-sans,"Plus Jakarta Sans"),-apple-system,BlinkMacSystemFont,"SF Pro Display","SF Pro Text","Inter",system-ui,sans-serif;margin:0;font-size:20px;font-weight:700}.LessonPlayer-module-scss-module__P2W5-W__waitingBar{background:var(--ds-surface-muted);border-radius:100px;width:200px;height:6px;position:relative;overflow:hidden}.LessonPlayer-module-scss-module__P2W5-W__waitingBar span{border-radius:inherit;background:var(--ds-accent);width:40%;animation:1.3s ease-in-out infinite LessonPlayer-module-scss-module__P2W5-W__waiting;position:absolute;inset:0 auto 0 0}@keyframes 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