.cubby,.cubby-btn,.speech{--cubby-body: #8b5cf6;--cubby-shade: #6d3fe0;--cubby-line: #2b1a55;--cubby-cheek: #f9a8d4;--cubby-spark: #f5b400}.cubby{display:block;flex:none;overflow:visible}.cubby *{transform-box:view-box}.cubby-shadow{fill:#00000021}.cubby-box{fill:var(--cubby-body);stroke:var(--cubby-line);stroke-width:3}.cubby-grooves{fill:none;stroke:var(--cubby-line);stroke-width:2;opacity:.12}.cubby-gloss{fill:none;stroke:#fff;stroke-width:4;stroke-linecap:round;opacity:.35}.cubby-foot{fill:var(--cubby-shade);stroke:var(--cubby-line);stroke-width:2.5}.cubby-arm-line{fill:none;stroke:var(--cubby-line);stroke-width:9;stroke-linecap:round}.cubby-arm-fill{fill:none;stroke:var(--cubby-shade);stroke-width:4;stroke-linecap:round}.cubby-hand{fill:var(--cubby-body);stroke:var(--cubby-line);stroke-width:2.5}.cubby-eye{fill:#fff;stroke:var(--cubby-line);stroke-width:2}.cubby-pupil{fill:var(--cubby-line)}.cubby-glint{fill:#fff}.cubby-lid,.cubby-brow{fill:none;stroke:var(--cubby-line);stroke-width:3;stroke-linecap:round}.cubby-cheek{fill:var(--cubby-cheek);opacity:.85}.cubby-mouth.is-line{fill:none;stroke:var(--cubby-line);stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.cubby-mouth.is-open{fill:var(--cubby-line);stroke:var(--cubby-line);stroke-width:2;stroke-linejoin:round}.cubby-mouth-b{opacity:0}.cubby-dots{fill:var(--cubby-line)}.cubby-sparkles{fill:var(--cubby-spark);stroke:var(--cubby-line);stroke-width:1;stroke-linejoin:round}.cubby-zs{fill:none;stroke:var(--cubby-line);stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round}.cubby-btn{display:inline-grid;place-items:center;flex:none;padding:0;border:0;border-radius:24px;background:none;cursor:pointer;-webkit-tap-highlight-color:transparent}.cubby-figure{transform-origin:60px 106px}.cubby-eyes{transform-origin:60px 54px}.cubby-arm-l{transform-origin:22px 64px}.cubby-arm-r{transform-origin:98px 64px}.cubby[data-mood=idle] .cubby-figure{animation:cubby-bob 3s ease-in-out infinite}.cubby[data-mood=idle] .cubby-eyes,.cubby[data-mood=point] .cubby-eyes,.cubby[data-mood=wave] .cubby-eyes{animation:cubby-blink 5s linear infinite}.cubby[data-mood=talk] .cubby-mouth-a{animation:cubby-swap-a .32s steps(1,end) infinite}.cubby[data-mood=talk] .cubby-mouth-b{animation:cubby-swap-b .32s steps(1,end) infinite}.cubby[data-point=right]{--nx: 3px;--ny: -1px}.cubby[data-point=left]{--nx: -3px;--ny: -1px}.cubby[data-point=up]{--nx: 0px;--ny: -3px}.cubby[data-point=down]{--nx: 1px;--ny: 3px}.cubby[data-mood=point] .cubby-arm.is-moving{animation:cubby-nudge 2s ease-in-out infinite}.cubby[data-mood=think] .cubby-dots circle{animation:cubby-dot 1.2s ease-in-out infinite}.cubby[data-mood=think] .cubby-dots circle:nth-child(2){animation-delay:.2s}.cubby[data-mood=think] .cubby-dots circle:nth-child(3){animation-delay:.4s}.cubby[data-mood=cheer] .cubby-figure{animation:cubby-jump .3s ease-out 2}.cubby[data-mood=cheer] .cubby-sparkles path{transform-origin:center;transform-box:fill-box;animation:cubby-pop .6s ease-out 1 both}.cubby[data-mood=oops] .cubby-figure{animation:cubby-wobble .3s ease-in-out 1}.cubby[data-mood=wave] .cubby-arm.is-moving{animation:cubby-wave .3s ease-in-out 3}.cubby[data-mood=sleep] .cubby-figure{animation:cubby-breathe 4s ease-in-out infinite}.cubby[data-mood=sleep] .cubby-zs{animation:cubby-z 4s ease-in-out infinite}@keyframes cubby-bob{0%,to{transform:translateY(0)}50%{transform:translateY(-3px)}}@keyframes cubby-blink{0%,94%,to{transform:scaleY(1)}97%{transform:scaleY(.1)}}@keyframes cubby-swap-a{0%{opacity:1}50%{opacity:0}}@keyframes cubby-swap-b{0%{opacity:0}50%{opacity:1}}@keyframes cubby-nudge{0%,60%,to{transform:translate(0)}75%{transform:translate(var(--nx),var(--ny))}}@keyframes cubby-dot{0%,to{opacity:.25}40%{opacity:1}}@keyframes cubby-jump{0%,to{transform:translateY(0)}45%{transform:translateY(-8px)}}@keyframes cubby-pop{0%{transform:scale(0)}60%{transform:scale(1.3)}to{transform:scale(1)}}@keyframes cubby-wobble{0%,to{transform:rotate(0)}25%{transform:rotate(-5deg)}75%{transform:rotate(5deg)}}@keyframes cubby-wave{0%,to{transform:rotate(0)}50%{transform:rotate(-16deg)}}@keyframes cubby-breathe{0%,to{transform:scale(1)}50%{transform:scale(1.015,.97)}}@keyframes cubby-z{0%,to{opacity:.35;transform:translateY(0)}50%{opacity:1;transform:translateY(-2px)}}.speech{display:flex;align-items:flex-start;gap:14px;min-width:0}.speech-cubby{flex:none;display:block}.speech-cubby.is-tappable{cursor:pointer;-webkit-tap-highlight-color:transparent}.speech-bubble{position:relative;flex:1;min-width:0;display:flex;align-items:flex-start;gap:10px;margin-top:6px;padding:12px 12px 12px 16px;background:var(--surface);color:var(--text);border:2px solid var(--border-ctl);border-radius:var(--radius);transition:border-color .2s,box-shadow .2s}.speech-bubble:before,.speech-bubble:after{content:"";position:absolute;top:18px;width:0;height:0;border-style:solid}.speech-bubble:before{left:-12px;border-width:10px 12px 10px 0;border-color:transparent var(--border-ctl) transparent transparent}.speech-bubble:after{left:-8px;border-width:8px 10px 8px 0;border-color:transparent var(--surface) transparent transparent}.speech-bubble.is-speaking{border-color:var(--cubby-body);box-shadow:0 0 0 3px color-mix(in srgb,var(--cubby-body) 28%,transparent)}.speech-bubble.is-speaking:before{border-right-color:var(--cubby-body)}.speech-text{flex:1;min-width:0;margin:0;align-self:center;font-size:var(--fs-read);line-height:1.5;color:var(--text);overflow-wrap:anywhere}.speech-speaker{flex:none;width:56px;height:56px;display:grid;place-items:center;padding:0;border-radius:50%;border:2px solid var(--border-ctl);background:var(--surface-2);color:var(--text);cursor:pointer}.speech-bubble.is-speaking .speech-speaker{background:var(--cubby-body);border-color:var(--cubby-line);color:#fff}.speech-speaker.is-blocked{animation:speech-ask 1.4s ease-in-out infinite}@keyframes speech-ask{0%,to{box-shadow:0 0 color-mix(in srgb,var(--cubby-body) 45%,transparent)}50%{box-shadow:0 0 0 8px transparent}}@media (prefers-reduced-motion: reduce){.cubby *,.speech-bubble,.speech-speaker{animation:none!important;transition:none!important}}:root[data-motion=reduced] .cubby *,:root[data-motion=reduced] .speech-bubble,:root[data-motion=reduced] .speech-speaker{animation:none!important;transition:none!important}.fv{flex:1;min-height:100vh;min-height:100dvh;display:flex;justify-content:center;align-items:flex-start;padding:16px 16px calc(16px + env(safe-area-inset-bottom,0px));background:var(--bg)}.fv-inner{width:min(640px,100%);display:grid;gap:10px;margin:auto 0}.fv-title{margin:4px 0 2px;font-size:1.5rem;line-height:1.2;font-weight:900;text-align:center}.fv-title:focus{outline:none}.fv-choices{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}.fv-choice{font:inherit;color:var(--text);background:var(--surface);border:2px solid var(--border-ctl);border-bottom-width:4px;border-radius:var(--radius);padding:14px 16px;min-height:168px;width:100%;cursor:pointer;text-align:left;display:grid;grid-template-columns:48px minmax(0,1fr);gap:4px 14px;align-items:center;align-content:center}.fv-choice:hover:not(:disabled){border-color:color-mix(in srgb,var(--blue) 60%,var(--border-ctl))}.fv-choice:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}.fv-choice:focus-visible{outline:3px solid var(--text);outline-offset:3px}.fv-choice:disabled{cursor:default;opacity:.6}.fv-art{display:block}.fv-choice-text{display:grid;gap:2px;min-width:0}.fv-word{font-size:22px;font-weight:900;line-height:1.2}.fv-name{font-size:20px;font-weight:800;line-height:1.25;color:var(--accent-dark)}.fv-tag{font-size:20px;line-height:1.25;color:var(--text-2)}.fv-extra{grid-column:1 / -1;font-size:16px;font-weight:800;color:var(--text)}.fv-note{margin:0;text-align:center;font-size:16px;color:var(--text-2)}.fv-about{font-size:16px}.fv-about summary{cursor:pointer;font-weight:700;color:var(--text);min-height:56px;display:flex;align-items:center;justify-content:center;gap:6px;list-style:none}.fv-about summary::-webkit-details-marker{display:none}.fv-about summary:after{content:"▾";font-size:.9em}.fv-about[open] summary:after{content:"▴"}.fv-about summary:focus-visible{outline:3px solid var(--text);outline-offset:-3px;border-radius:10px}.fv-about p{margin:0 0 8px;color:var(--text-2)}.fv-links{margin:0;text-align:center;font-size:16px;display:flex;justify-content:center;align-items:center;flex-wrap:wrap}.fv-account{display:inline-flex;align-items:center}.fv-link{color:var(--text);text-decoration:underline;font-weight:700;min-height:56px;display:inline-flex;align-items:center;padding:0 6px}.fv-link:focus-visible{outline:3px solid var(--text);outline-offset:-3px;border-radius:10px}@media (min-width: 560px){.fv-title{font-size:1.75rem;margin-bottom:8px}.fv-choices{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}.fv-choice{grid-template-columns:minmax(0,1fr);align-content:start;min-height:200px;min-width:160px;padding:18px;gap:10px}}@media (min-width: 761px){.fv-word{font-size:27px}}@media (prefers-reduced-motion: reduce){.fv-choice:active:not(:disabled){transform:none}}.pathbar-row{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 12px}.pathbar-name{font-weight:800;font-size:16px}.pathbar-switch{font-size:16px}.pathbar-arrived{margin:0}.pathbar-arrived:not(:empty){margin-top:8px;color:var(--text-2)}.pathbar-sheet{--unit: var(--blue)}.pathbar-sheet:focus{outline:none}.pathbar-sheet .sheet-head h2{margin:6px 0 0;font-size:1.3rem}.pathbar-choices{display:grid;gap:10px}.pathbar-sheet .fv-choice{min-height:96px;grid-template-columns:48px minmax(0,1fr);align-content:center;padding:14px 16px;gap:4px 14px}.pathbar-sheet .fv-word{font-size:22px}.pathbar-sheet .fv-choice.here{border-color:color-mix(in srgb,var(--accent) 55%,var(--border-ctl))}.pathbar-failed{margin:0;color:var(--text);font-weight:700;border-left:4px solid var(--oops);padding-left:8px}.pathbar-note{margin:0;color:var(--text-2)}.pathbar-links{margin:0}.pathbar-links .fv-link{padding-left:0}.pathbar-sheet .fv-about summary{justify-content:flex-start}.bmap{--dock-h: 150px;display:grid;grid-template-columns:minmax(0,1fr);gap:16px;align-items:start}.bmap-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}.bmap-dock-col{display:grid;gap:16px;min-width:0}.bmap-greet .speech-cubby{position:relative;border-radius:50%;padding:6px}.bmap-greet .speech-cubby:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;border-radius:50%;background:conic-gradient(var(--accent) calc(var(--p, 0) * 1turn),color-mix(in srgb,var(--border-ctl) 35%,transparent) 0);-webkit-mask:radial-gradient(farthest-side,transparent calc(100% - 7px),#000 calc(100% - 6px));mask:radial-gradient(farthest-side,transparent calc(100% - 7px),#000 calc(100% - 6px))}.bmap-greet .speech-cubby>.cubby{position:relative}.bmap-dock{display:grid;gap:10px}.bmap-dock-line{margin:0;font-size:var(--fs-read);line-height:1.25;font-weight:800;overflow-wrap:anywhere}.bmap .bmap-dock-btn{width:100%;min-height:72px;font-size:1.35rem;white-space:normal}.bmap .bmap-dock-second{width:100%;white-space:normal}.bmap-dock-pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}.bmap-pathbar{padding:4px 0}.bmap-pathbar .pathbar-row{min-height:56px}.island,.island-panel{--unit-line: color-mix(in srgb, var(--unit) var(--unit-mix), var(--text))}.bmap-islands{display:grid;grid-template-columns:minmax(0,1fr);gap:14px;min-width:0}.island{border-radius:var(--radius);background:var(--surface);border:2px solid var(--border);scroll-margin-top:calc(var(--sticky-top) + 4px)}.island-head{width:100%;min-height:96px;display:flex;align-items:center;gap:14px;padding:10px 14px;background:none;border:0;border-left:8px solid var(--unit-line);border-radius:inherit;color:var(--text);font:inherit;text-align:left;cursor:pointer}.island-text{flex:1;min-width:0;display:grid;gap:4px}.island-title{font-weight:900;font-size:1.15rem;line-height:1.25;overflow-wrap:anywhere}.island-why{color:var(--text-2);font-size:max(.9rem,var(--fs-floor));line-height:1.35}.island-locked .island-head{border-left-color:var(--border-ctl)}.island-locked .face-glyph{filter:grayscale(1);opacity:.55}.island-locked .island-title{color:var(--text-2)}.island-here{border-color:var(--unit-line);box-shadow:0 0 0 2px var(--unit-line)}.island.is-open{border-bottom-left-radius:8px;border-bottom-right-radius:8px}.island-mark{flex:none;display:grid;place-items:center;width:44px;height:44px;color:var(--text-2)}.island-mark-done{color:var(--accent-dark)}.island-flag{flex:none;padding:4px 12px;border-radius:999px;font-weight:900;font-size:max(.85rem,var(--fs-floor));border:2px solid var(--border-ctl);background:var(--surface-2);color:var(--text)}.island-flag-here{background:var(--unit);color:var(--unit-ink);border-color:var(--unit-line);animation:bmap-bounce 2.4s ease-in-out infinite}@keyframes bmap-bounce{0%,70%,to{transform:translateY(0)}80%{transform:translateY(-5px)}90%{transform:translateY(0)}}.island-panel{margin-top:-10px;padding:18px 12px 14px;border:2px solid var(--border);border-top:0;border-left:8px solid var(--unit-line);border-radius:0 0 var(--radius) var(--radius);background:color-mix(in srgb,var(--unit) 7%,var(--surface))}.island-panel.is-here{border-color:var(--unit-line)}.btiles{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px 6px}.btile-wrap{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:0;text-align:center}.btile{--tile: 72px;position:relative;width:var(--tile);height:var(--tile);border-radius:50%;display:grid;grid-template-rows:auto 1fr;place-items:center;padding:6px 0 8px;border:3px solid var(--unit-line);border-bottom-width:6px;background:var(--surface);color:var(--text);font:inherit;cursor:pointer}.btile:active{transform:translateY(2px);border-bottom-width:3px}.btile-num{font-weight:900;font-size:max(.8rem,var(--fs-floor));line-height:1}.btile-icon{font-size:1.5rem;line-height:1;display:grid;place-items:center}.btile-done .btile{background:var(--unit);color:var(--unit-ink)}.btile-locked .btile{background:var(--surface-2);border-color:var(--border-ctl);color:var(--text-2);cursor:default}.btile-now .btile{box-shadow:0 0 0 4px var(--surface),0 0 0 8px var(--unit-line);animation:bmap-pulse 1.8s ease-in-out infinite}@keyframes bmap-pulse{0%,to{box-shadow:0 0 0 4px var(--surface),0 0 0 8px var(--unit-line)}50%{box-shadow:0 0 0 4px var(--surface),0 0 0 13px color-mix(in srgb,var(--unit-line) 35%,transparent)}}.btile-now .btile.wiggle-0{animation:bmap-wiggle-a .5s ease-in-out,bmap-pulse 1.8s ease-in-out .5s infinite}.btile-now .btile.wiggle-1{animation:bmap-wiggle-b .5s ease-in-out,bmap-pulse 1.8s ease-in-out .5s infinite}@keyframes bmap-wiggle-a{0%,to{transform:rotate(0)}20%{transform:rotate(-9deg)}40%{transform:rotate(8deg)}60%{transform:rotate(-6deg)}80%{transform:rotate(4deg)}}@keyframes bmap-wiggle-b{0%,to{transform:rotate(0)}20%{transform:rotate(-9deg)}40%{transform:rotate(8deg)}60%{transform:rotate(-6deg)}80%{transform:rotate(4deg)}}.btile-title{font-size:max(.8rem,var(--fs-floor));line-height:1.25;font-weight:700;color:var(--text);overflow-wrap:anywhere;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.btile-stars{display:flex;gap:1px;color:var(--text-2);min-height:22px}.btile-done .btile-stars .icon:not([style]){color:var(--text-2)}.btile-label{font-weight:900;font-size:max(.8rem,var(--fs-floor));padding:1px 10px;border-radius:999px;background:var(--unit);color:var(--unit-ink)}.bmap .bmap-end{margin:0;border-left:8px solid var(--accent-dark)}.bmap-end p{margin:0 0 10px}.bmap-end-title{margin:0 0 8px;font-size:1.3rem}.bmap-end-bar .pathbar-name{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.bmap-end-bar .pathbar-switch{min-height:56px}.bsheet .sheet-head{align-items:center}.bsheet .sheet-head .bsheet-title{font-size:var(--fs-read);line-height:1.25}.bsheet-legend{list-style:none;margin:0;padding:0;display:grid;gap:6px;color:var(--text-2)}.bsheet-legend li{display:flex;align-items:center;gap:10px}.bsheet-legend li.is-on{color:var(--text);font-weight:700}.bsheet-legend-stars{display:inline-flex;width:72px}.bsheet .bsheet-start{min-height:72px;font-size:1.3rem;margin-top:0}.bsheet-prompt{justify-self:center}@media (max-width: 760px){.page.bmap{padding-bottom:calc(var(--nav-clear) + var(--dock-h) + 16px)}.bmap-dock{position:fixed;left:0;right:0;bottom:var(--tabbar-offset, 0px);z-index:29;padding:12px 16px;background:var(--surface);border-top:2px solid var(--border);box-shadow:0 -6px 18px color-mix(in srgb,#000 10%,transparent)}.bmap-dock-line{font-size:1.15rem}}@media (max-width: 359px){.btile{--tile: 64px}.btiles{gap:14px 4px}}@media (min-width: 761px){.bmap{grid-template-columns:320px minmax(0,1fr);gap:28px}.bmap-dock-col{position:sticky;top:var(--sticky-top)}.bmap-greet .speech{flex-direction:column;align-items:center}.bmap-greet .speech-bubble{align-self:stretch;margin-top:4px}.bmap-greet .speech-bubble:before{left:50%;top:-12px;margin-left:-10px;border-width:0 10px 12px 10px;border-color:transparent transparent var(--border-ctl) transparent}.bmap-greet .speech-bubble:after{left:50%;top:-8px;margin-left:-8px;border-width:0 8px 10px 8px;border-color:transparent transparent var(--surface) transparent}.bmap-greet .speech-bubble.is-speaking:before{border-right-color:transparent;border-bottom-color:var(--cubby-body)}.bmap .bmap-dock-btn{min-height:80px}.bmap-islands{grid-template-columns:repeat(2,minmax(0,1fr));grid-auto-flow:row dense}.island-panel,.bmap-end{grid-column:1 / -1}.island-panel{margin-top:0;border-top:2px solid var(--border);border-radius:var(--radius)}.btiles{grid-template-columns:repeat(6,minmax(0,1fr))}}:root[data-motion=reduced] .island-flag-here,:root[data-motion=reduced] .btile-now .btile{animation:none}:root[data-motion=reduced] .btile-now .btile.wiggle-0,:root[data-motion=reduced] .btile-now .btile.wiggle-1{animation:none;box-shadow:0 0 0 4px var(--surface),0 0 0 10px var(--gold)}.bmap-storage{margin:8px 0 0;padding:8px 12px;border-radius:12px;border-left:4px solid var(--oops);background:var(--surface);color:var(--text);font-weight:700}.cubby-help{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin:8px 0}.cubby-help .speech{flex:1 1 240px;min-width:0}.cubby-help-cubby{display:inline-flex}.cubby-help-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-width:56px;min-height:56px;padding:8px 18px;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);font:inherit;font-weight:800;font-size:1.05rem;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.cubby-help-btn:hover{border-color:var(--gold)}.cubby-help-btn:active{transform:translateY(2px);border-bottom-width:2px}.cubby-help-btn:focus-visible{outline:3px solid var(--text);outline-offset:3px}.cubby-help-btn .icon{color:var(--gold)}.cubby-help-btn[aria-disabled=true]{opacity:.6;cursor:default}.cubby-help-btn.is-offering{animation:cubby-help-offer 1.6s ease-in-out infinite;border-color:var(--gold)}@keyframes cubby-help-offer{0%,to{transform:scale(1)}50%{transform:scale(1.06)}}.ex-turn-row{display:flex;align-items:flex-end;gap:12px;margin-top:12px;width:100%}.ex-turn-row>.ex-turn-main{flex:1 1 auto;min-width:0}.ex-turn-row .turn-buttons-wrap{margin-top:0}.ex-undo{flex:0 0 auto;width:56px;height:56px;display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;padding:2px;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);font:inherit;font-size:.7rem;font-weight:800;cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent}.ex-undo:active{transform:translateY(2px);border-bottom-width:2px}.ex-undo:focus-visible{outline:3px solid var(--text);outline-offset:3px}.ex-undo[aria-disabled=true]{opacity:.45;cursor:default}@media (prefers-reduced-motion: reduce){.cubby-help-btn.is-offering{animation:none}.cubby-help-btn:active,.ex-undo:active{transform:none}}.ex-help-row{display:flex;flex-wrap:wrap;align-items:center;gap:12px}.ex-help-row .cubby-help{display:contents}.ex-help-row .speech{flex:1 1 100%}@media (min-width: 821px){.exercise.ex-words-first{grid-template-rows:auto 1fr}.ex-words-first>.exercise-cube{grid-column:2;grid-row:1 / span 2}.ex-words-first>.ex-help-row{grid-column:1;grid-row:2;align-self:start}}@media (max-width: 820px){.exercise.ex-words-first{gap:8px}.ex-words-first>.exercise-cube{order:0}.ex-words-first .exercise-info h3{margin:0;font-size:1.2rem}.ex-words-first .exercise-info .md p{margin:0}.ex-words-first .ex-turn-row{margin-top:8px}.ex-words-first .cube-view{max-height:min(var(--cube-max-h),var(--ex-cube-fit, 100vh))}.bs-set .ex-words-first .exercise-info>h3,.ex-words-first:has(.road) .exercise-info>h3{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.bs-set .ex-words-first:has(.ex-help-row .speech) .exercise-info>.md{display:none}.ex-help-row{gap:8px}.ex-help-row .speech{gap:10px}.ex-help-row .speech-cubby svg{width:48px;height:48px}.ex-help-row .speech-bubble{margin-top:0;padding:6px 10px 6px 12px}.ex-help-row .speech-text{font-size:1.1rem;line-height:1.35}}@media (max-width: 420px){.ex-help-row .cubby-help-cubby{display:none}}.turn-buttons-wrap{width:100%;margin-top:12px}.turn-buttons{display:flex;flex-wrap:nowrap;justify-content:center;gap:12px}.turn-btn{--turn-size: 56px;flex:0 0 auto;width:var(--turn-size);height:var(--turn-size);min-width:56px;min-height:56px;padding:4px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1px;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;touch-action:manipulation;-webkit-tap-highlight-color:transparent;user-select:none;-webkit-user-select:none}.turn-buttons-wrap[data-size=wide] .turn-btn{--turn-size: 64px}.turn-btn:hover{border-color:var(--blue)}.turn-btn:active{transform:translateY(2px);border-bottom-width:2px}.turn-btn:focus-visible{outline:3px solid var(--text);outline-offset:3px}.turn-btn[aria-disabled=true]{cursor:default;border-color:color-mix(in srgb,var(--border-ctl) 45%,transparent)}.turn-btn[aria-disabled=true]>*{opacity:.45}.turn-btn[aria-disabled=true]:active{transform:none;border-bottom-width:4px}.turn-pic{width:100%;height:100%;flex:1 1 0;min-height:0;display:block}.turn-pic-body{fill:var(--cube-body)}.turn-pic-dim{fill:#7d838c}.turn-pic-lit{fill:#fff}.turn-pic-rim,.turn-pic-arrow{fill:none;stroke-linecap:round;stroke-linejoin:round}.turn-pic-rim{stroke:#fff;stroke-width:1.5}.turn-pic-arrow{stroke-width:.8}.turn-pic-head{stroke:#fff;stroke-width:.35;stroke-linejoin:round;paint-order:stroke}.turn-letter{font-family:JetBrains Mono,monospace;font-weight:800;font-size:.8rem;line-height:1}.turn-more{font-weight:800;font-size:1.12rem;gap:6px;padding-inline:2px}.turn-more-dots{display:flex;gap:2px}.turn-more-dots i{width:5px;height:5px;border-radius:50%;border:1.5px solid var(--text-2)}.turn-more-dots i.on{background:var(--text-2)}.turn-live{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}@media (prefers-reduced-motion: reduce){.turn-btn:active{transform:none}}.rc-words{display:grid;gap:8px;align-content:start;min-width:0}.rc-hold,.rc-note{margin:0;font-weight:800;line-height:1.4;color:var(--text-2)}.rc-note.is-on{color:var(--text)}.rc-buttons{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;width:100%}.rc-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:56px;min-width:56px;padding:8px 18px;white-space:nowrap}.rc-btn[aria-disabled=true]{opacity:.55;cursor:default}.rc-screen{flex-basis:100%;max-width:max-content}.rc-dots{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}.rc-dot{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;border:2px solid var(--border-ctl);background:var(--surface);color:var(--on-accent, #fff)}.rc-dot.is-done{background:var(--accent);border-color:var(--accent-dark, var(--accent))}.rc-dot.is-now{box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 45%,transparent);border-color:var(--blue)}.rc-panel{display:grid;gap:12px;padding:12px;border-radius:var(--radius);border:2px solid var(--border-ctl);background:var(--surface)}.rc-panel .rc-buttons{justify-content:flex-start}@media (max-width: 820px){.rc-words{gap:4px}.rc-hold{font-size:1rem;line-height:1.35}.rc-buttons{gap:8px}.rc-panel{gap:8px;padding:8px 10px}}.rc-choice{display:flex;flex-wrap:wrap;gap:12px}.rc-choice-btn{display:inline-flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;min-height:56px;min-width:112px;padding:8px 16px;font:inherit;font-weight:800;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);background:var(--surface);color:var(--text);cursor:pointer;position:relative}.rc-choice-btn[aria-checked=true]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.rc-choice-btn:focus-visible{outline:3px solid var(--text);outline-offset:3px}.rc-choice-pic{font-size:1.6rem;line-height:1}.rc-choice-badge{position:absolute;top:4px;right:6px;font-size:.9rem}.rc-choice.is-compact .rc-choice-btn{min-width:56px;padding:4px 10px}.rc-choice.is-compact .rc-choice-label{font-size:.85rem}.road{margin:6px 0 4px}.road-stops{display:flex;align-items:center;justify-content:space-between;gap:0;margin:0;padding:0;list-style:none;max-width:420px}.road-stop{position:relative;flex:1 1 0;display:flex;justify-content:center}.road-stop+.road-stop:before{content:"";position:absolute;top:50%;right:50%;width:100%;height:4px;margin-top:-2px;border-radius:2px;background:var(--surface-2);box-shadow:var(--edge-ring)}.road-stop.is-done+.road-stop:before,.road-stop.is-here:before{background:var(--accent);box-shadow:none}.road-dot{position:relative;z-index:1;display:inline-grid;place-items:center;width:30px;height:30px;border-radius:50%;border:2px solid var(--border-ctl);background:var(--surface);color:var(--muted);font-weight:800;font-size:.9rem;line-height:1}.road-stop.is-done .road-dot{background:var(--accent);border-color:var(--accent-dark);color:var(--on-accent)}.road-stop.is-here .road-dot{width:38px;height:38px;border:3px solid var(--gold);color:var(--text);font-size:1.05rem;box-shadow:0 0 0 4px color-mix(in srgb,var(--gold) 30%,transparent)}.road-name{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.road-line{min-height:1.4em;margin:6px 0 0;font-weight:700;font-size:var(--fs-read)}.road[data-moved=back] .road-line{color:var(--oops)}.road-dot{transition:background-color .3s,border-color .3s,width .2s,height .2s}@media (prefers-reduced-motion: no-preference){.road[data-stuck] .road-stop.is-here .road-dot{animation:road-stuck 1.6s ease-in-out infinite}}@keyframes road-stuck{0%,to{transform:scale(1);box-shadow:0 0 0 4px color-mix(in srgb,var(--gold) 30%,transparent)}50%{transform:scale(1.12);box-shadow:0 0 0 8px color-mix(in srgb,var(--gold) 45%,transparent)}}.bf-lesson{--bf-ctl: max(56px, var(--tap-min))}.bf-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.bf-top{display:grid;grid-template-columns:var(--bf-ctl) minmax(0,1fr) auto var(--bf-ctl);align-items:center;gap:8px;min-height:64px;margin-bottom:8px}@media (min-width: 761px){.bf-top{min-height:72px}}.bf-icon-btn{display:grid;place-items:center;width:56px;height:56px;min-width:var(--tap-min);min-height:var(--tap-min);border:0;border-radius:16px;background:transparent;color:var(--text-2);cursor:pointer;padding:0}.bf-icon-btn:hover:not(:disabled){background:var(--surface-2)}.bf-icon-btn:focus-visible{outline:3px solid var(--text);outline-offset:2px}.bf-icon-btn:disabled{opacity:.45;cursor:not-allowed}.bf-icon-btn.is-muted{color:var(--muted)}.bf-dots{display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:nowrap;min-width:0}.bf-dot{flex:none;width:12px;height:12px;border-radius:50%;box-shadow:inset 0 0 0 2px var(--border-ctl);display:grid;place-items:center;color:var(--unit-ink, #fff)}.bf-dot.is-done{width:16px;height:16px;background:var(--unit);box-shadow:none}.bf-dot.is-current{width:20px;height:20px;box-shadow:inset 0 0 0 3px var(--unit),0 0 0 3px color-mix(in srgb,var(--unit) 30%,transparent)}@media (max-width: 360px){.bf-dots{gap:7px}}.bf-chip{position:relative}.bf-chip-btn{font-size:1.8rem;line-height:1}.bf-chip-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:40}.bf-chip-pop{position:absolute;top:calc(100% + 6px);right:0;z-index:41;padding:12px;border-radius:20px;background:var(--surface);box-shadow:var(--edge-ring, inset 0 0 0 2px var(--border)),0 8px 24px #0000002e}.bf-chip-pop .rc-choice{flex-wrap:nowrap}.bf-mid{position:relative;align-self:stretch;display:grid;align-items:center;min-width:0}.bf-dots.is-under{visibility:hidden}.bf-welcome{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;margin:0;font-size:1.1rem;font-weight:800;line-height:1.2;color:var(--text-2);text-align:center;text-wrap:balance;animation:bf-welcome-in .25s ease-out}@media (min-width: 761px){.bf-welcome{font-size:1.35rem}}@media (max-width: 420px){.bf-welcome{font-size:1rem;line-height:1.12}}@media (max-width: 370px){.bf-welcome-more{display:none}}@keyframes bf-welcome-in{0%{opacity:0}}@media (max-width: 820px){.bf-lesson .step>.exercise:not(.ex-words-first) .cube-view{max-height:min(var(--cube-max-h),var(--ex-cube-fit, var(--cube-max-h)))}}@media (max-width: 820px) and (max-height: 720px){.bf-lesson.page{padding-top:8px}.bf-top{min-height:56px;margin-bottom:4px}.bf-lesson .lesson-footer{padding-top:8px;padding-bottom:8px}.bf-lesson .lesson-footer .btn{padding-top:12px;padding-bottom:12px}}.bf-exit{gap:18px}.bf-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px;width:100%}.bf-pair.is-one{grid-template-columns:1fr}.btn.bf-big{min-height:72px;font-size:1.15rem;padding:12px 16px}@media (min-width: 761px){.btn.bf-big{min-height:80px}}.bf-blocked{display:grid;gap:24px;justify-items:center;max-width:520px;margin:40px auto}.bf-finish-page{display:grid;place-items:center;min-height:100vh;min-height:100dvh;padding-top:16px;padding-bottom:16px}.bf-finish{position:relative;display:grid;justify-items:center;gap:12px;width:min(480px,100%);text-align:center}.bf-stars{display:flex;gap:12px;justify-content:center;min-height:56px;align-items:center}.bf-star{display:grid;place-items:center;color:var(--border-ctl);transform:scale(.85);transition:transform .25s ease-out}.bf-star.is-landed{transform:scale(1);animation:bf-land .35s ease-out}@keyframes bf-land{0%{transform:scale(.4)}70%{transform:scale(1.2)}to{transform:scale(1)}}.bf-star-line{margin:0;font-size:var(--fs-read);font-weight:800}.bf-finish .speech{width:100%;text-align:left}.bf-gems{display:inline-flex;align-items:center;gap:8px;margin:0;padding:6px 16px;border-radius:999px;background:var(--surface-2);font-weight:900;font-size:1.25rem}.bf-opened{margin:0;color:var(--text-2)}.bf-again{justify-self:center}.bf-confetti{position:absolute;inset:-16px 0 auto 0;height:280px;pointer-events:none;overflow:hidden}.bf-confetti span{position:absolute;top:-12px;width:8px;height:14px;border-radius:2px;opacity:0;animation:bf-fall 2s ease-in forwards}.bf-confetti span:nth-child(3n){width:10px;height:10px;border-radius:50%}@keyframes bf-fall{0%{opacity:1;transform:translateY(0) rotate(0)}85%{opacity:1}to{opacity:0;transform:translateY(280px) rotate(540deg)}}.bf-still-star{display:grid;place-items:center}.bf-stickers{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:16px}.bf-sticker{display:grid;justify-items:center;gap:6px;width:120px;padding:12px;border-radius:20px;background:var(--surface);box-shadow:var(--edge-ring, inset 0 0 0 2px var(--border))}.bf-sticker-pic{font-size:56px;line-height:1}.bf-sticker-name{font-weight:800}.bs-step{display:grid;grid-template-columns:var(--lesson-cols);gap:28px;align-items:start}.bs-words{display:grid;gap:12px;align-content:start;min-width:0}.bs-title{margin:0;font-size:1.2rem}.bs-stage{display:grid;grid-template-columns:minmax(0,1fr);gap:12px;justify-items:center;min-width:0}.bs-stage>.cube-view{width:100%;max-height:min(var(--cube-max-h),52vh)}@media (min-width: 821px){.bs-step.is-fit:not(.bs-quiz) .bs-stage>.cube-view{max-height:min(var(--cube-max-h),52vh,var(--ex-cube-fit, 52vh))}}@media (max-width: 820px){.bs-step{grid-template-columns:minmax(0,1fr);gap:12px}.bs-stage>.cube-view{max-height:36vh}.bs-stage{gap:8px}.bs-set .bs-stage>.cube-view{max-height:30vh}.bs-quiz .bs-stage>.cube-view{max-height:20vh}.bs-step.is-fit .bs-stage>.cube-view{max-height:min(44vh,var(--ex-cube-fit, 36vh))}.bs-step.is-fit.is-fit-36 .bs-stage>.cube-view{max-height:min(36vh,var(--ex-cube-fit, 36vh))}.bs-quiz.is-fit .bs-stage>.cube-view{max-height:min(20vh,var(--ex-cube-fit, 20vh))}}.bs-line{margin:0;min-height:1.6em;font-weight:800;color:var(--text-2)}.bs-line.is-on{color:var(--text)}.bs-strip,.bs-row{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:12px;width:100%}.bs-strip{flex-wrap:nowrap}@media (max-width: 420px){.bs-strip .bs-ctl{flex:1 1 auto;padding:8px 12px}}.bs-ctl{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:56px;min-width:56px;padding:8px 18px;white-space:nowrap}.bs-dots{display:flex;flex-wrap:wrap;gap:8px;align-items:center;justify-content:center}.bs-dot{display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;border:2px solid var(--border-ctl);background:var(--surface);color:var(--on-accent, #fff)}.bs-dot.is-done{background:var(--accent);border-color:var(--accent-dark, var(--accent))}.bs-dot.is-now{box-shadow:0 0 0 3px color-mix(in srgb,var(--blue) 45%,transparent);border-color:var(--blue)}.bs-rounds{justify-content:flex-start}.bs-options{margin:0}.bs-quiz{grid-template-areas:"words stage" "options stage";grid-template-rows:auto 1fr}.bs-quiz>.bs-words{grid-area:words}.bs-quiz>.bs-stage{grid-area:stage}.bs-quiz>.bs-options{grid-area:options;grid-template-columns:1fr 1fr}@media (max-width: 820px){.bs-quiz{grid-template-areas:"words" "stage" "options";grid-template-rows:none}}.bs-art-img{width:100%;max-height:var(--cube-max-h);object-fit:contain;border-radius:var(--radius)}.bs-proxies{list-style:none;margin:0;padding:0;display:flex;justify-content:center}.bs-proxies>li:not(:focus-within){position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}.bs-proxy{font:inherit;font-weight:800;min-height:56px;padding:8px 14px;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);background:var(--surface);color:var(--text);cursor:pointer}.bs-proxy[aria-pressed=true]{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.bs-proxy:focus-visible{outline:3px solid var(--text);outline-offset:3px}.bs-set{display:flex;flex-direction:column;gap:12px}.bs-set-head{display:flex;flex-wrap:wrap;gap:4px 16px;align-items:center;justify-content:center;text-align:center}.bs-set-copy{margin:0;font-weight:800;line-height:1.4}.bs-set-head .bs-line{flex-basis:100%;min-height:0}.bs-stars{display:flex;gap:8px;color:var(--text-2)}.bs-round>.step{gap:var(--gap-step)}.wr{display:flex;flex-direction:column;gap:var(--gap-step)}.wr-head{display:flex;align-items:center;gap:var(--gap);flex-wrap:wrap}.wr-head h1{margin:0;flex:1 1 auto}.wr-back{min-height:var(--tap-min)}.wr-dots{display:flex;gap:10px;list-style:none;margin:0;padding:0}.wr-dots li{width:14px;height:14px;border-radius:50%;border:2px solid var(--border-ctl)}.wr-dots li.on{background:var(--accent);border-color:var(--accent-dark)}.wr-dots li.here{border-color:var(--blue);border-width:3px}.wr-lesson{margin:0;font-size:1.1rem;color:var(--text-2, var(--text))}.wr-actions{display:flex;gap:var(--gap);flex-wrap:wrap}.wr-actions .btn{min-height:var(--tap-min)}.wr-star{margin:0;display:flex;justify-content:center;color:var(--accent-dark)}.wr-standin{min-height:120px;display:flex;align-items:center;justify-content:center}.wr-offer .btn{display:inline-flex;align-items:center;gap:8px}@media (max-width: 760px){.wr{gap:8px}.wr>.speech .speech-cubby svg{width:56px;height:56px}.wr>.speech .speech-bubble{margin-top:0;padding:8px 10px 8px 14px}.wr>.speech .speech-text{font-size:1.1rem;line-height:1.35}.wr-round .ex-words-first .exercise-info>h3{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}}.bp-practice h1{margin-top:0}.bp-practice-cols{display:grid;gap:var(--gap-step)}.bp-practice-cards{display:grid;gap:var(--gap);align-content:start}.bp-practice-cards .card{margin:0;display:grid;gap:var(--gap)}.bp-big{min-height:var(--tap-min);justify-self:stretch;text-align:center;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.bp-done{margin:0;display:flex;justify-content:center;color:var(--accent-dark)}.bp-pick-title{margin:0;font-weight:800}.bp-skills h2{margin:0 0 var(--gap)}.bp-tiles{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:var(--gap)}.bp-tile{position:relative;width:100%;min-height:112px;display:flex;flex-direction:column;gap:8px;padding:0 14px 12px;overflow:hidden;text-align:left;font:inherit;color:var(--text);background:var(--surface);border:2px solid var(--border-ctl);border-bottom-width:4px;border-radius:var(--radius-ctl);cursor:pointer}.bp-tile:focus-visible{outline:3px solid var(--text);outline-offset:3px}.bp-tile:active{transform:translateY(2px);border-bottom-width:2px}.bp-tile-band{display:block;height:12px;margin:0 -14px;background:var(--tile)}.bp-tile-title{font-weight:800;line-height:1.25;flex:1 1 auto}.bp-tile-foot{display:flex;align-items:center;justify-content:space-between}.bp-tile-stars{display:inline-flex;gap:2px}.bp-tile.is-closed{color:var(--muted);background:var(--bg);border-color:var(--border)}.bp-tile.is-closed .bp-tile-band{opacity:.35}.bp-dot{width:12px;height:12px;border-radius:50%;background:var(--blue)}@media (min-width: 761px){.bp-practice-cols{grid-template-columns:minmax(0,2fr) minmax(0,3fr);align-items:start}.bp-tiles{grid-template-columns:repeat(3,minmax(0,1fr))}}.bp-play{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--gap-step);align-items:start}.bp-play-cube{position:relative}.bp-play-cube .cube-view{max-height:75vh}.bp-play-badge{position:absolute;top:12px;left:12px;background:var(--surface);border:2px solid var(--border);border-radius:12px;padding:4px 12px;font-weight:800;color:var(--text-2, var(--text))}.bp-play-badge.on{color:var(--accent-dark);border-color:var(--accent-dark)}.bp-play-side{display:grid;grid-template-columns:minmax(0,1fr);gap:var(--gap);align-content:start;min-width:0}.bp-play-side .turn-buttons-wrap{margin-top:0}.bp-play-row{display:flex;gap:var(--gap);flex-wrap:wrap}.bp-play-row .btn,.bp-play-wide{min-height:var(--tap-min)}.bp-play-wide{width:100%}.bp-play-sheet{display:grid;gap:var(--gap);padding:var(--pad-card);border:2px solid var(--border-ctl);border-radius:var(--radius);background:var(--surface)}.bp-play-sheet-title{margin:0;font-weight:800}.bp-play-key{justify-content:center}.bp-party{position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:6rem;pointer-events:none;animation:bp-party 1.6s ease-out forwards}@keyframes bp-party{0%{transform:scale(.2);opacity:0}25%{transform:scale(1.15);opacity:1}70%{transform:scale(1);opacity:1}to{transform:scale(1);opacity:0}}@media (min-width: 861px){.bp-play{grid-template-columns:minmax(300px,1fr) minmax(0,420px)}}@media (max-width: 760px){.bp-play-cube .cube-view{max-height:40vh;max-width:40vh;margin:0 auto}}.sb-empty{margin:0 0 var(--gap)}.sb-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:var(--gap)}.sb-item{position:relative;display:flex;flex-direction:column;align-items:center;gap:4px;padding:12px 8px;text-align:center;border:2px solid var(--border-ctl);border-radius:var(--radius-ctl);background:var(--surface-2, var(--surface))}.sb-icon{font-size:2.2rem;line-height:1;min-height:2.2rem}.sb-title{font-weight:800;font-size:max(.9rem,var(--fs-floor));line-height:1.2}.sb-new{position:absolute;top:-10px;right:-6px;padding:2px 8px;border-radius:999px;background:var(--blue);color:var(--bg);font-weight:900;font-size:max(.75rem,var(--fs-floor))}.sb-item.is-outline{background:transparent;border-style:dashed;border-color:var(--border-ctl);color:var(--muted)}.sb-item.is-outline .sb-icon{width:2.2rem;border-radius:50%;border:2px dashed var(--border-ctl)}.sb-hint{font-size:max(.8rem,var(--fs-floor));color:var(--muted)}.me-top h1{margin-top:0}.me-top h2{margin:0 0 var(--gap);font-size:1.15rem}.me-grid{display:grid;gap:0 var(--gap-step)}.me-col{min-width:0}.me-tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:var(--gap);margin-bottom:16px}.me-tile{display:flex;flex-direction:column;align-items:flex-start;gap:2px;padding:12px;background:var(--surface);border:2px solid var(--border);border-radius:var(--radius)}.me-tile>span{font-size:1.6rem;line-height:1}.me-tile b{font-size:1.8rem;font-weight:900;line-height:1.1}.me-tile small{color:var(--muted);font-weight:700;font-size:max(.85rem,var(--fs-floor))}.me-week{list-style:none;margin:0;padding:0;display:flex;gap:10px}.me-week li{width:28px;height:28px;border-radius:50%;border:3px solid var(--border-ctl)}.me-week li.on{background:var(--gold);border-color:var(--star-edge, var(--gold))}.me-sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;margin:-1px}.me-unit{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:4px 12px;align-items:center;margin-bottom:14px;font-weight:700}.me-unit-title{grid-column:1 / -1}.me-unit .progress>div{background:color-mix(in srgb,var(--unit) 75%,var(--text))}.me-stars{display:inline-flex;gap:2px;vertical-align:middle}.me-legend{list-style:none;margin:var(--gap) 0 0;padding:0;display:grid;gap:6px;color:var(--text-2, var(--text));font-size:max(.9rem,var(--fs-floor))}.me-legend li{display:flex;align-items:center;gap:8px}.me-fix{margin:var(--gap) 0 0}.me-storage{display:grid;gap:6px}.me-storage p{margin:0}.bp-me-cards{display:grid;grid-template-columns:minmax(0,1fr);gap:0 var(--gap-step);align-items:start}.bp-me-cards>*{min-width:0}.bp-me-cards .btn{white-space:normal}.bp-me-cards .setting>.seg{flex:0 1 auto}.bp-swatch-key{padding:10px 0;border-bottom:1px solid var(--border)}.bp-check{min-height:var(--tap-min);cursor:pointer}.bp-check input{width:28px;height:28px;margin:0;accent-color:var(--accent-dark);cursor:pointer}@media (min-width: 761px){.me-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}@media (min-width: 1100px){.bp-me-cards{grid-template-columns:repeat(auto-fit,minmax(320px,1fr))}}@font-face{font-family:Nunito;font-style:normal;font-display:swap;font-weight:200 1000;src:url(./nunito-latin-ext-wght-normal-CXYtwYOx.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Nunito;font-style:normal;font-display:swap;font-weight:200 1000;src:url(./nunito-latin-wght-normal-BzFMHfZw.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500 700;src:url(./jetbrains-mono-latin-ext-wght-normal-DBQx-q_a.woff2) format("woff2");unicode-range:U+0100-02BA,U+02BD-02C5,U+02C7-02CC,U+02CE-02D7,U+02DD-02FF,U+0304,U+0308,U+0329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:JetBrains Mono;font-style:normal;font-display:swap;font-weight:500 700;src:url(./jetbrains-mono-latin-wght-normal-B9CIFXIH.woff2) format("woff2");unicode-range:U+0000-00FF,U+0131,U+0152-0153,U+02BB-02BC,U+02C6,U+02DA,U+02DC,U+0304,U+0308,U+0329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--bg: #f7f7f5;--surface: #ffffff;--surface-2: #f1f1ee;--border: #e5e5e0;--text: #1f2328;--text-2: #4b5058;--muted: #777b83;--accent: #58cc02;--accent-dark: #46a302;--blue: #1cb0f6;--danger: #ff4b4b;--gold: #ffc800;--locked: #d7d7d2;--series-1: #2a78d6;--series-2: #eb6834;--grid: #e6e6e1;--radius: 16px;--cube-body: #1d1f24;--slot: #dcdcd6;--unit-mix: 75%;--fs-root: 100%;--fs-body: 16px;--lh-body: 1.5;--fs-read: 1.05rem;--fs-floor: 0px;--tt-label: uppercase;--gap: 8px;--pad-card: 16px;--gap-step: 16px;--gap-options: 10px;--radius-ctl: 14px;--tap-min: auto;--btn-pad: 9px 16px;--btn-pad-lg: 12px 20px;--lesson-cols: 1fr minmax(280px, 460px);--cube-max-h: 62vh;--nav-clear: 84px;--sticky-top: 76px;--progress-h: 14px;--edge-ring: none;--nav-active-bar: none;--fw-nav-active: 800;--border-ctl: var(--border);--on-accent: #fff;--oops: var(--danger);color-scheme:light}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--text: #eef0f2;--text-2: #c3c8ce;--muted: #8e959e;--locked: #3a4048;--series-1: #3987e5;--series-2: #d95926;--grid: #2c3238;--cube-body: #0e1013;--slot: #262b32;--unit-mix: 70%;color-scheme:dark}}:root[data-theme=dark]{--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--text: #eef0f2;--text-2: #c3c8ce;--muted: #8e959e;--locked: #3a4048;--series-1: #3987e5;--series-2: #d95926;--grid: #2c3238;--cube-body: #0e1013;--slot: #262b32;--unit-mix: 70%;color-scheme:dark}.u-card,.next-card,.sheet,.practice-unit,.unit-row,.lesson-top,.finish-card{--unit-line: color-mix(in srgb, var(--unit) var(--unit-mix), var(--text))}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%}html{font-size:var(--fs-root)}body{background:var(--bg);color:var(--text);font-family:Nunito,system-ui,-apple-system,Segoe UI,sans-serif;font-size:var(--fs-body);line-height:var(--lh-body);-webkit-font-smoothing:antialiased}h1,h2,h3{line-height:1.2;margin:0 0 .5em;font-weight:900}h1{font-size:1.8rem}h2{font-size:1.35rem}h3{font-size:1.05rem}a{color:var(--blue)}code,.mono{font-family:JetBrains Mono,ui-monospace,monospace}.muted{color:var(--muted)}.small{font-size:max(.85rem,var(--fs-floor))}.tiny{font-size:max(.7rem,var(--fs-floor))}.center{text-align:center;display:flex;justify-content:center}.row{display:flex;align-items:center}.row.gap{gap:var(--gap)}.row.between{justify-content:space-between}.row.wrap,.wrap{flex-wrap:wrap}.gap{gap:var(--gap)}.ok-text{color:var(--accent-dark);font-weight:800}.bad-text{color:var(--oops);font-weight:700}.storage-note{margin:0 0 12px;padding:8px 12px;border-radius:12px;border-left:4px solid var(--oops);background:var(--surface);color:var(--text);font-weight:700}.map-side .storage-note{grid-column:1 / -1}.btn{font:inherit;font-weight:800;border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);padding:var(--btn-pad);border-radius:var(--radius-ctl);min-height:var(--tap-min);min-width:var(--tap-min);cursor:pointer;text-transform:none;transition:transform .05s;white-space:nowrap}.btn:active:not(:disabled){transform:translateY(2px);border-bottom-width:2px}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--accent);border-color:var(--accent-dark);color:var(--on-accent)}.btn.danger{background:var(--danger);border-color:#d33131;color:#fff}.btn.ghost{background:transparent}.btn.light{background:#ffffffe6;color:#222;border-color:#00000026}.btn.small{padding:5px 10px;font-size:max(.85rem,var(--fs-floor));border-radius:10px}.btn.full{width:100%;margin-top:8px}.link{background:none;border:0;color:var(--blue);cursor:pointer;font:inherit;font-weight:700;padding:0}.input{font:inherit;padding:9px 12px;border-radius:12px;border:2px solid var(--border-ctl);background:var(--surface);color:var(--text);flex:1;min-width:0}.input.bad{border-color:var(--danger)}select{font:inherit;padding:4px 8px;border-radius:8px;border:2px solid var(--border);background:var(--surface);color:var(--text)}.seg{display:inline-flex;background:var(--surface-2);border-radius:12px;padding:3px;gap:2px;flex-wrap:wrap}.seg button{font:inherit;font-weight:800;font-size:.85rem;border:0;background:transparent;color:var(--text-2);padding:6px 11px;border-radius:9px;cursor:pointer;position:relative;min-height:var(--tap-min);min-width:var(--tap-min)}.seg button.on{background:var(--surface);color:var(--text);box-shadow:0 1px 3px #00000026}.seg.compact button{padding:4px 8px}.dot-on{position:absolute;top:3px;right:3px;width:7px;height:7px;border-radius:50%;background:var(--accent)}.toggle{display:inline-flex;gap:6px;align-items:center;font-weight:700}.card{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:var(--pad-card);margin-bottom:16px}code.alg{background:var(--surface-2);padding:2px 7px;border-radius:6px;font-size:.92em;word-spacing:2px;display:inline-block}code.alg.big{font-size:1.1rem;padding:8px 12px;display:block;margin:6px 0}code.alg.tiny{font-size:.62rem;padding:1px 4px;word-break:break-word}.alg-tail{white-space:nowrap}.alg-tail>code.alg{white-space:normal;max-width:calc(100% - 1em)}.link-tail{white-space:nowrap}.link-tail>.show-link{white-space:normal;max-width:calc(100% - 1em)}.app{min-height:100vh;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:16px;padding:8px 20px;background:var(--surface);border-bottom:2px solid var(--border);position:sticky;top:0;z-index:20}.brand{font-weight:900;font-size:1.3rem;color:var(--accent);text-decoration:none;white-space:nowrap}@media (max-width: 960px){.brand{font-size:1.05rem}}.mainnav{display:flex;gap:4px;flex:1}.mainnav a{text-decoration:none;color:var(--text-2);font-weight:800;padding:8px 12px;border-radius:12px;border:2px solid transparent;min-height:var(--tap-min);min-width:var(--tap-min)}.mainnav a.active{color:var(--blue);background:color-mix(in srgb,var(--blue) 12%,transparent);border-color:color-mix(in srgb,var(--blue) 40%,transparent);box-shadow:var(--nav-active-bar);font-weight:var(--fw-nav-active)}.top-stats{display:flex;gap:12px;align-items:center;font-weight:900;white-space:nowrap}.streak{filter:grayscale(1);opacity:.6}.streak.on{filter:none;opacity:1;color:#ff9600}main{flex:1}.page{max-width:1180px;margin:0 auto;padding:24px 20px 90px}@media (max-width: 760px){:root{--tabbar-offset: calc(60px + env(safe-area-inset-bottom)) }.topbar{padding:8px 12px;gap:8px}.brand span{display:none}.mainnav{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:2px solid var(--border);justify-content:space-around;padding:6px 4px calc(6px + env(safe-area-inset-bottom));z-index:30}.mainnav a{display:flex;flex-direction:column;align-items:center;font-size:max(.7rem,var(--fs-floor));padding:4px 8px}.top-stats{margin-left:auto}.page{padding:16px 16px calc(var(--nav-clear) + 16px)}}.map-page{display:grid;grid-template-columns:1fr 300px;gap:32px;align-items:start}.map-side{order:2;position:sticky;top:var(--sticky-top)}.path{order:1}@media (max-width: 900px){.map-page{grid-template-columns:1fr}.map-side{order:0;position:static;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:12px}.map-side .card{margin:0}}.goal-ring{--p: 0;width:120px;height:120px;margin:8px auto;border-radius:50%;background:conic-gradient(var(--gold) calc(var(--p) * 360deg),var(--surface-2) 0);display:grid;place-items:center}.goal-ring span{background:var(--surface);width:92px;height:92px;border-radius:50%;display:grid;place-items:center;align-content:center;font-weight:900;font-size:1.2rem}.goal-ring small{display:block;font-size:.7rem;color:var(--muted)}.progress{height:var(--progress-h);border-radius:99px;background:var(--surface-2);overflow:hidden;flex:1;box-shadow:var(--edge-ring)}.progress>div{height:100%;background:var(--accent);border-radius:99px;transition:width .4s}.stars span{color:var(--locked)}.stars span.on{color:var(--gold)}.eyebrow{font-size:max(.72rem,var(--fs-floor));font-weight:900;text-transform:var(--tt-label);letter-spacing:.07em;color:var(--muted)}.today-card{display:flex;gap:14px;align-items:center}.today-card .goal-ring{width:96px;height:96px;margin:0;flex-shrink:0}.today-card .goal-ring span{width:74px;height:74px;font-size:1.3rem;line-height:1.1}.today-stats{display:grid;gap:6px}.today-stats div{display:flex;flex-direction:column}.today-stats b{font-size:1.05rem;font-variant-numeric:tabular-nums}.today-stats small{color:var(--muted);font-size:.75rem;font-weight:700}.next-card{border-color:color-mix(in srgb,var(--unit, var(--accent)) 45%,var(--border))}.next-card h3{margin:4px 0;font-size:1.2rem}.collection-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:8px;margin-top:10px}.collection-item{background:none;border:0;padding:0;cursor:pointer;display:grid;place-items:center;min-height:var(--tap-min);min-width:var(--tap-min)}.collection-item:focus-visible{outline:3px solid var(--blue);border-radius:8px}.face-glyph{flex-shrink:0}.face-body{fill:var(--cube-body);stroke:color-mix(in srgb,var(--text) 14%,transparent);stroke-width:.6}.face-off{fill:var(--slot)}.face-on{fill:var(--locked)}.units{display:grid;gap:18px;min-width:0}.u-card{background:var(--surface);border:2px solid var(--border);border-radius:20px;overflow:hidden;overflow:clip;scroll-margin-top:calc(var(--sticky-top) + 4px)}.u-card.locked{background:color-mix(in srgb,var(--surface-2) 60%,var(--surface))}.u-head{width:100%;display:flex;gap:14px;align-items:center;padding:14px 16px;background:none;border:0;color:var(--text);font:inherit;text-align:left;cursor:pointer;border-left:6px solid var(--unit-line)}.u-card.locked .u-head{border-left-color:var(--locked)}.u-head:focus-visible{outline:3px solid var(--blue);outline-offset:-3px}.u-text{display:flex;flex-direction:column;gap:1px;flex:1;min-width:0}.u-title{font-weight:900;font-size:1.25rem;line-height:1.2;text-wrap:balance}.u-desc{color:var(--text-2);font-size:.9rem}.u-when{margin:0 16px 12px;color:var(--text-2)}.u-note{margin:0 16px 12px;color:var(--text-2);font-style:italic}.lnode-opt{color:var(--text-2);font-weight:400}.u-meta{display:flex;flex-direction:column;align-items:flex-end;gap:4px;flex-shrink:0}.chev{color:var(--muted);font-size:.9rem}.pill{display:inline-flex;align-items:center;gap:4px;font-size:max(.72rem,var(--fs-floor));font-weight:900;text-transform:var(--tt-label);letter-spacing:.05em;padding:2px 9px;border-radius:99px;white-space:nowrap}.pill-locked{background:var(--surface-2);color:var(--muted)}.pill-complete{background:color-mix(in srgb,var(--gold) 30%,transparent);color:color-mix(in srgb,var(--gold) 45%,var(--text))}.pill-in-progress{background:color-mix(in srgb,var(--unit) 22%,transparent);color:color-mix(in srgb,var(--unit) 40%,var(--text))}.pill-new{background:var(--unit);color:var(--unit-ink, #fff)}.lock-icon{fill:currentColor;stroke:currentColor}.pill .lock-icon{width:12px;height:12px}.unit-lock{margin:0 16px 16px;background:var(--surface);border:2px dashed var(--border);border-radius:14px;padding:12px 14px;display:grid;gap:6px;justify-items:start}.unit-lock ul{margin:0;padding-left:1.2em;display:grid;gap:8px}.unit-lock li>*{margin-right:6px}.gate-bar{display:block;width:min(220px,100%);height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden;margin:4px 0 2px}.gate-bar>span{display:block;height:100%;background:var(--gold);border-radius:99px}.track{--tile: 68px;--col-gap: 12px;--row-gap: 20px;--rail: 4px;--bend: 12px;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));column-gap:var(--col-gap);row-gap:var(--row-gap);max-width:500px;margin:0 auto;padding:14px calc(var(--bend) + 8px) 20px}.lnode-wrap{position:relative;min-width:0;display:flex;flex-direction:column;align-items:center;gap:6px}.lnode{position:relative;z-index:1;flex-shrink:0;width:var(--tile);height:var(--tile);padding:5px;border:0;border-radius:15px;cursor:pointer;font:inherit;background:var(--cube-body);box-shadow:inset 0 0 0 1px color-mix(in srgb,#fff 9%,transparent);transition:transform .08s}.lnode:active{transform:translateY(1px)}.lnode:focus-visible{outline:3px solid var(--blue);outline-offset:3px}.sticker{position:relative;width:100%;height:100%;display:grid;place-items:center;border-radius:10px;background:var(--slot);color:var(--text-2)}.lnode.done .sticker{background:linear-gradient(150deg,color-mix(in srgb,#fff 26%,transparent),transparent 48%),var(--unit);color:var(--unit-ink, #fff)}.lnode.avail .sticker{background:color-mix(in srgb,var(--unit) 30%,#fff);color:#1d1f24}.lnode.unread .sticker{background:color-mix(in srgb,var(--unit) 50%,#fff);color:#1d1f24}.lnode.master{background:linear-gradient(145deg,#fff0a8,var(--gold) 40%,#c99700);box-shadow:inset 0 0 0 1px color-mix(in srgb,#fff 45%,transparent)}.lnode.current{box-shadow:0 0 0 3px var(--surface),0 0 0 6px var(--unit-line)}.lnode-next{position:absolute;z-index:2;top:-11px;left:50%;transform:translate(-50%);padding:1px 7px;border-radius:6px;background:var(--unit);color:var(--unit-ink, #fff);box-shadow:0 0 0 2px var(--surface);font-size:.62rem;font-weight:900;line-height:1.4;text-transform:var(--tt-label);letter-spacing:.08em;white-space:nowrap}.lnode-num{font-family:JetBrains Mono,monospace;font-weight:700;font-size:1.35rem}.lnode-check{font-size:1.5rem;font-weight:900;line-height:1}.lnode-n{position:absolute;top:4px;left:6px;font-family:JetBrains Mono,monospace;font-size:.6rem;font-weight:700;line-height:1;opacity:.75}.lnode .lock-icon{width:16px;height:16px;opacity:.8}.lnode-title{max-width:100%;font-size:max(.8rem,var(--fs-floor));font-weight:800;text-align:center;line-height:1.2;color:var(--text-2);overflow-wrap:break-word;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.lnode-wrap.current .lnode-title{color:var(--text)}.pips{display:flex;gap:2px;padding:2px;border-radius:4px;background:var(--cube-body)}.pips i{width:8px;height:8px;border-radius:2px;background:var(--slot)}.pips i.on{background:var(--gold)}.path-link{position:absolute;top:calc(var(--tile) / 2 - var(--rail) / 2);--rail-color: var(--border)}.path-link.done{--rail-color: var(--unit-line)}.path-link-right,.path-link-left{width:calc(100% - var(--tile) + var(--col-gap));height:var(--rail);background:var(--rail-color)}.path-link-right,.path-link-turn-right{left:calc(50% + var(--tile) / 2)}.path-link-left,.path-link-turn-left{right:calc(50% + var(--tile) / 2)}.path-link-turn-right,.path-link-turn-left{width:calc(50% - var(--tile) / 2 + var(--bend));height:calc(100% + var(--row-gap) + var(--rail));border:var(--rail) solid var(--rail-color)}.path-link-turn-right{border-left:0;border-radius:0 20px 20px 0}.path-link-turn-left{border-right:0;border-radius:20px 0 0 20px}.gate{grid-column:1 / -1;justify-self:center;width:min(100%,420px);display:flex;gap:12px;align-items:center;background:var(--surface);border:2px solid color-mix(in srgb,var(--gold) 55%,var(--border));border-radius:16px;padding:10px 12px}.gate.done{background:color-mix(in srgb,var(--gold) 16%,var(--surface))}.gate.current{border-color:var(--gold)}.gate.stretch{border-style:dashed}.gate-trophy{flex-shrink:0;width:46px;height:46px;padding:4px;border-radius:12px;background:var(--cube-body)}.gate-trophy>span{width:100%;height:100%;display:grid;place-items:center;border-radius:8px;background:var(--slot);font-size:1.25rem}.gate.done .gate-trophy>span{background:linear-gradient(150deg,color-mix(in srgb,#fff 35%,transparent),transparent 50%),var(--gold)}.gate-text{display:flex;flex-direction:column;flex:1;min-width:0}.gate-text .gate-bar{width:100%}.sheet-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:color-mix(in srgb,#000 35%,transparent);z-index:50;display:flex;align-items:flex-end;justify-content:center;padding:16px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0px))}.sheet{width:min(520px,100%);background:var(--surface);border-radius:22px;padding:18px;border-top:6px solid var(--unit-line);box-shadow:0 -8px 40px #00000040;display:grid;gap:14px;animation:rise .18s ease-out;max-height:85vh;overflow:auto}@keyframes rise{0%{transform:translateY(24px);opacity:0}}.sheet-head{display:flex;gap:12px;align-items:flex-start}.sheet-head h3{margin:2px 0;font-size:1.3rem}.sheet-head p{margin:0}.sheet-head>div{flex:1;min-width:0}.sheet-icon{font-size:2rem;width:48px;height:48px;display:grid;place-items:center;background:color-mix(in srgb,var(--unit) 16%,var(--surface));border-radius:14px;flex-shrink:0}.sheet-close{background:none;border:0;font-size:1.2rem;color:var(--muted);cursor:pointer;padding:4px;min-height:var(--tap-min);min-width:var(--tap-min)}.sheet .tier-btn{display:grid;grid-template-columns:1fr auto;gap:2px 10px;text-align:left;align-items:center}.sheet .tier-name{font-weight:900}.sheet .tier-desc{grid-column:1 / -1;grid-row:2;font-size:.78rem;font-weight:600;color:var(--muted)}.sheet .tier-btn small{grid-column:2;grid-row:1}@media (max-width: 760px){.sheet-backdrop{padding-bottom:calc(var(--nav-clear) + env(safe-area-inset-bottom,0px))}}@media (max-width: 900px){.map-side{grid-template-columns:1fr}.collection{display:none}}@media (max-width: 480px){.u-desc{display:none}.track{--tile: 58px;--col-gap: 8px;--row-gap: 18px;--bend: 10px}.lnode-title{font-size:max(.75rem,var(--fs-floor))}}@media (prefers-reduced-motion: reduce){.sheet,.toast{animation:none}.lnode{transition:none}}.cube-view{position:relative;width:100%;aspect-ratio:1 / 1;max-height:var(--cube-max-h);background:radial-gradient(circle at 50% 40%,var(--surface) 0%,var(--surface-2) 100%);border-radius:var(--radius);border:2px solid var(--border);overflow:hidden}.cube-canvas{position:absolute;top:0;right:0;bottom:0;left:0}.cube-canvas canvas{display:block;cursor:grab}.cube-recenter{position:absolute;top:8px;right:8px;border:0;background:var(--surface);color:var(--text-2);border-radius:8px;width:30px;height:30px;min-height:var(--tap-min);min-width:var(--tap-min);cursor:pointer;font-size:1rem;opacity:.8}.move-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:4px;margin-top:10px}.move-buttons button{font-family:JetBrains Mono,monospace;font-weight:700;padding:7px 0;border-radius:9px;border:2px solid var(--border);border-bottom-width:3px;background:var(--surface);color:var(--text);cursor:pointer}.move-buttons button:active{transform:translateY(1px)}.move-buttons .move-more{grid-column:1 / -1;font-family:inherit;font-size:.85rem;color:var(--text-2);padding:4px 0}.move-buttons.more{margin-top:4px;grid-template-columns:repeat(8,1fr)}.keymap{margin-top:12px}.keymap summary{cursor:pointer;font-weight:800;color:var(--text-2)}.keymap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(70px,1fr));gap:4px;margin-top:8px;font-size:.8rem;font-family:JetBrains Mono,monospace}kbd{background:var(--surface-2);border:1px solid var(--border);border-bottom-width:2px;border-radius:4px;padding:0 5px;font-size:.75rem}.ll-diagram{flex-shrink:0}.lesson{max-width:1100px}.lesson-top{display:flex;align-items:center;gap:16px;margin-bottom:20px}.lesson-top .close{font-size:1.4rem;text-decoration:none;color:var(--muted);font-weight:900;min-height:var(--tap-min);min-width:var(--tap-min)}.lesson-top .progress>div{background:var(--unit-line)}.step{display:flex;flex-direction:column;gap:var(--gap-step)}.text-step,.exercise{display:grid;grid-template-columns:var(--lesson-cols);gap:28px;align-items:start}@media (max-width: 820px){.text-step,.exercise{grid-template-columns:minmax(0,1fr);gap:16px}.exercise-cube{order:-1}}.text-body{font-size:var(--fs-read);line-height:1.5}.md p{margin:0 0 .8em}.md ul,.md ol{padding-left:1.3em;margin:0 0 .8em}.md li{margin-bottom:4px}.demo-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin-top:12px}.md h4{margin:1em 0 .4em;font-size:1rem}.scene .exercise-cube{position:sticky;top:76px}.show-link{font:inherit;font-weight:800;color:var(--blue);background:color-mix(in srgb,var(--blue) 10%,transparent);border:none;border-bottom:2px dashed color-mix(in srgb,var(--blue) 55%,transparent);border-radius:4px;padding:0 3px;cursor:pointer}.show-link:hover{background:color-mix(in srgb,var(--blue) 18%,transparent)}.show-link.on{background:var(--blue);color:#fff;border-bottom-style:solid}.show-link:after{content:" 👁";font-size:.8em}details.more{margin-top:18px;border:2px solid var(--border);border-radius:14px;padding:10px 14px;background:var(--surface)}details.more>summary{cursor:pointer;font-weight:800;color:var(--muted)}details.more[open]>summary{margin-bottom:10px}.shot{display:grid;gap:8px}.shot-cube{position:relative}.orient-badge{position:absolute;left:10px;top:10px;display:inline-flex;align-items:center;gap:4px;padding:3px 8px;border-radius:99px;background:color-mix(in srgb,var(--surface) 85%,transparent);border:1px solid var(--border);font-size:.75rem;font-weight:800;color:var(--muted);pointer-events:none}.orient-badge.turned{color:var(--text);border-color:currentColor}.orient-badge i{display:inline-block;width:11px;height:11px;border-radius:3px;border:1px solid rgba(0,0,0,.25)}.shot-caption-text{margin:0;font-weight:700;padding:6px 10px;border-radius:10px;background:color-mix(in srgb,#e8175d 9%,var(--surface))}.shot-chips{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.shot-chips .chip{font:inherit;font-size:.85rem;font-weight:700;padding:4px 10px;border-radius:99px;border:2px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer}.shot-chips-label{font-size:.8rem;font-weight:800;color:var(--muted);align-self:center;flex:none}.shot-chips .chip.on{background:var(--blue);border-color:var(--blue);color:#fff}.move-wrap{display:inline-flex;align-items:center;gap:4px}.chunk-sep{color:var(--muted);font-weight:900;padding:0 2px}.shot-caption{display:flex;align-items:center;justify-content:space-between;gap:8px;font-weight:700}.player{display:grid;gap:8px}.player-moves{display:flex;flex-wrap:wrap;gap:4px}.player-moves .chip{font:inherit;font-family:ui-monospace,monospace;font-weight:700;min-width:34px;padding:3px 7px;border-radius:8px;border:2px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer}.player-moves .chip.done{color:var(--muted);background:var(--surface-2)}.player-moves .chip.next{border-color:#e8175d;color:#e8175d}.player-controls{display:flex;flex-wrap:wrap;gap:6px}@media (max-width: 820px){.scene .exercise-cube{top:56px;z-index:4;background:var(--bg);padding-bottom:6px}.scene .cube-view,.predict .cube-view{max-height:32vh}.scene .shot-chips,.scene .player-moves{flex-wrap:nowrap;overflow-x:auto;padding-bottom:2px}.scene .shot-chips .chip,.scene .player-moves .chip{flex:none}}.exercise-info h3{font-size:1.4rem}.physical-box,.hint-box{background:color-mix(in srgb,var(--blue) 10%,var(--surface));border:2px solid color-mix(in srgb,var(--blue) 35%,transparent);border-radius:14px;padding:12px 14px;margin:12px 0}.hint-box{background:color-mix(in srgb,var(--gold) 14%,var(--surface));border-color:color-mix(in srgb,var(--gold) 50%,transparent)}.physical-box p,.hint-box p{margin:0 0 6px}.case-extra{display:flex;gap:14px;align-items:center;margin:10px 0}.lesson-footer{position:sticky;bottom:0;display:flex;justify-content:flex-end;align-items:center;gap:16px;padding:14px 16px;margin:0 -16px;border-top:2px solid var(--border);background:var(--bg);z-index:5}.lesson-footer.ok{background:color-mix(in srgb,var(--accent) 16%,var(--bg))}.lesson-footer .ok-text{margin-right:auto;font-size:1.2rem}.lesson-footer .btn{min-width:160px;padding:var(--btn-pad-lg)}.quiz{max-width:620px;margin:0 auto;width:100%}.options{display:grid;gap:var(--gap-options);margin:16px 0}.options.grid2{grid-template-columns:1fr 1fr}.option{font:inherit;font-weight:800;font-size:var(--fs-read);line-height:1.5;padding:14px;border-radius:var(--radius-ctl);border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;text-align:left;min-height:var(--tap-min);min-width:var(--tap-min)}.option.right{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 14%,var(--surface))}.option.wrong{border-color:var(--oops);background:color-mix(in srgb,var(--oops) 12%,var(--surface))}.lesson-finish{display:grid;place-items:center;min-height:70vh}.finish-card{text-align:center;background:var(--surface);border:3px solid var(--unit-line, var(--border));border-radius:24px;padding:32px 40px;max-width:440px}.big-icon{font-size:4rem}.stars{font-size:2.4rem;letter-spacing:6px}.xp-gain{font-size:1.4rem;font-weight:900;color:var(--gold)}.timer-page{display:grid;grid-template-columns:1fr 360px;gap:24px;align-items:start}@media (max-width: 960px){.timer-page{grid-template-columns:1fr}}.scramble-box{display:flex;gap:10px;align-items:flex-start;justify-content:center;margin:16px 0}.scramble{font-size:1.25rem;text-align:center;word-spacing:6px;line-height:1.6}.big-time{font-family:JetBrains Mono,monospace;font-weight:700;font-size:clamp(4rem,14vw,8rem);text-align:center;padding:30px 0;user-select:none;-webkit-user-select:none;touch-action:none;cursor:pointer;border-radius:var(--radius);font-variant-numeric:tabular-nums}.big-time.small-font{font-size:clamp(2.5rem,9vw,4.5rem);padding:10px 0;cursor:default}.big-time.holding{color:var(--danger)}.big-time.ready{color:var(--accent)}.big-time.inspect{color:#ff9600}.phys-timer{min-height:50vh}.timer-cube .cube-view{max-height:52vh}.splits{display:flex;gap:3px;margin:10px 0;font-size:.78rem}.splits>div{background:var(--surface-2);border-radius:6px;padding:4px 6px;min-width:70px;text-align:center;white-space:nowrap;overflow:hidden}.stats{width:100%;border-collapse:collapse}.stats th{text-align:left;color:var(--muted);font-size:.78rem;font-weight:800}.stats td{padding:3px 0;font-weight:700}.solve-list{list-style:none;padding:0;margin:0;max-height:420px;overflow:auto}.solve-row{width:100%;display:grid;grid-template-columns:44px 1fr auto;gap:8px;align-items:center;font:inherit;background:none;border:0;border-bottom:1px solid var(--border);padding:6px 2px;cursor:pointer;color:var(--text);text-align:left}.solve-detail{padding:8px 4px 12px;border-bottom:1px solid var(--border)}.solve-detail code{display:block;margin-bottom:6px;word-spacing:3px}.scramble-track-wrap{flex:1;min-width:0}.scramble-track{display:flex;flex-wrap:wrap;justify-content:center;gap:4px 6px;font-family:JetBrains Mono,monospace;font-size:1.25rem;line-height:1.5;min-width:0}.scramble-track span{padding:1px 6px;border-radius:8px;border:2px solid transparent;cursor:default}.scramble-track span[role=button]{cursor:pointer}.scramble-track span.done{color:var(--accent-dark);background:color-mix(in srgb,var(--accent) 16%,transparent)}.scramble-track span.cur{background:var(--gold);color:#000;border-color:#e0a800;font-weight:800;transform:scale(1.12)}.scramble-track span.bad,.scramble-track span.cur.wrong{background:var(--danger);border-color:#d33131;color:#fff}.scramble-nav{justify-content:center;margin-top:8px;flex-wrap:wrap}.scramble-nav .btn{min-width:52px}.scramble-status{text-align:center;flex:0 1 auto;min-width:0}.scramble-reset{margin-top:8px}.viz-root{color:var(--text)}.viz-legend{display:flex;gap:14px;font-size:.8rem;color:var(--text-2);margin-bottom:4px}.viz-legend i{display:inline-block;width:12px;height:3px;border-radius:2px;vertical-align:middle;margin-right:4px}.viz-wrap{position:relative}.viz{width:100%;height:auto;display:block;touch-action:pan-y}.viz .grid{stroke:var(--grid);stroke-width:1}.viz .tick{fill:var(--muted);font-size:11px;font-family:Nunito,sans-serif}.viz .dlabel{fill:var(--text-2);font-size:11px;font-weight:700;font-family:Nunito,sans-serif}.viz .line{fill:none;stroke-width:2;stroke-linejoin:round;stroke-linecap:round}.viz .crosshair{stroke:var(--muted);stroke-width:1;stroke-dasharray:3 3}.viz .dot{stroke:var(--surface);stroke-width:2}.viz-tip{position:absolute;top:0;transform:translate(-50%);background:var(--surface);border:1px solid var(--border);border-radius:8px;padding:6px 10px;font-size:.78rem;pointer-events:none;white-space:nowrap;box-shadow:0 4px 12px #0000001f}.practice-page section{margin-top:18px}.group-title{display:flex;gap:10px;align-items:baseline}.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:10px}.case-card{font:inherit;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 8px;border-radius:14px;border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer}.case-card.sel{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 10%,var(--surface))}.case-card.box0,.case-card.box1{border-bottom-color:var(--danger)}.case-card.box2,.case-card.box3{border-bottom-color:#ff9600}.case-card.box4,.case-card.box5,.case-card.box6{border-bottom-color:var(--accent)}.grade-bar{position:sticky;bottom:var(--tabbar-offset, 0px);z-index:31;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;padding:14px 16px;background:color-mix(in srgb,var(--accent) 14%,var(--bg));border-top:2px solid var(--border);margin:16px -16px 0;font-weight:800}.trainer .exercise{margin-top:12px}.play-page{display:grid;grid-template-columns:minmax(300px,1fr) 380px;gap:24px;align-items:start}@media (max-width: 860px){.play-page{grid-template-columns:1fr}}.play-cube{position:relative}.play-cube .cube-view{max-height:75vh}.solved-badge{position:absolute;top:12px;left:12px;background:var(--surface);border-radius:10px;padding:4px 10px;font-weight:800;font-size:.85rem;color:var(--muted)}.solved-badge.on{color:var(--accent-dark)}.play-side>*+*{margin-top:12px}.history{display:block;max-height:120px;overflow:auto;word-spacing:3px;font-size:.85rem}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:12px;margin-bottom:16px}.tile{background:var(--surface);border:2px solid var(--border);border-radius:var(--radius);padding:14px;display:flex;flex-direction:column}.tile span{font-size:1.4rem}.tile b{font-size:1.6rem;font-weight:900;font-family:JetBrains Mono,monospace}.tile small{color:var(--muted);font-weight:700}.heatmap{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;grid-auto-columns:14px;gap:3px;overflow-x:auto}.heatmap i{border-radius:3px;background:var(--surface-2)}.heatmap i.lv1{background:color-mix(in srgb,var(--accent) 30%,var(--surface-2))}.heatmap i.lv2{background:color-mix(in srgb,var(--accent) 55%,var(--surface-2))}.heatmap i.lv3{background:color-mix(in srgb,var(--accent) 80%,var(--surface-2))}.heatmap i.lv4{background:var(--accent-dark)}.unit-row{display:grid;grid-template-columns:160px 1fr 50px;gap:12px;align-items:center;margin-bottom:8px;font-weight:700}.unit-row .progress>div{background:var(--unit-line)}.ach-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px}.ach{display:flex;flex-direction:column;align-items:center;text-align:center;padding:12px;border-radius:14px;background:var(--surface-2);opacity:.55;filter:grayscale(1)}.ach.got{opacity:1;filter:none;background:color-mix(in srgb,var(--gold) 18%,var(--surface));border:2px solid color-mix(in srgb,var(--gold) 60%,transparent)}.ach span{font-size:2rem}.ach small{color:var(--muted);font-size:.75rem}.setting{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 0;border-bottom:1px solid var(--border);font-weight:700;flex-wrap:wrap}.about-link{text-align:center;margin:8px 0 0}.info-page{max-width:760px;overflow-wrap:anywhere}.info-page .lead{color:var(--text-2);font-size:1.05rem;margin:0 0 16px}.info-page .card>h2{font-size:1.05rem}.info-page .card p{margin:0 0 10px}.info-page .card p:last-child{margin-bottom:0}.info-page .card ul{margin:0 0 10px;padding-left:1.2em;display:grid;gap:6px}.info-page .card ul:last-child{margin-bottom:0}.info-page blockquote{margin:0 0 10px;padding:8px 12px;border-left:4px solid var(--border);background:var(--surface-2);border-radius:0 10px 10px 0;color:var(--text-2)}.privacy-date{margin:-8px 0 12px}.account-form .field-hint{font-weight:600}.toasts{position:fixed;bottom:24px;right:16px;display:flex;flex-direction:column;gap:8px;z-index:100}.toast{display:flex;gap:12px;align-items:center;background:var(--surface);border:2px solid var(--gold);border-radius:14px;padding:10px 14px;box-shadow:0 8px 24px #0000002e;animation:pop .3s ease-out;max-width:320px}.toast-icon{font-size:1.8rem}@keyframes pop{0%{transform:translateY(-10px) scale(.95);opacity:0}}@media (max-width: 760px){.toasts{bottom:var(--nav-clear);left:16px}}.tier-list{display:grid;gap:6px;margin-top:8px}.tier-btn{font:inherit;display:flex;justify-content:space-between;align-items:center;gap:8px;padding:8px 10px;border-radius:12px;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;font-weight:800}.tier-btn small{color:var(--muted);font-weight:700}.tier-btn.done{border-color:color-mix(in srgb,var(--gold) 70%,transparent);background:color-mix(in srgb,var(--gold) 12%,var(--surface))}.tier-btn:disabled{opacity:.5;cursor:not-allowed}.slips{font-weight:900;white-space:nowrap}.slips.bad{color:var(--danger)}.target-clock{margin:10px 0}.target-bar{height:10px;border-radius:99px;background:var(--surface-2);overflow:hidden;margin-bottom:4px}.target-bar>div{height:100%;background:var(--accent);transition:width .1s linear}.target-clock.over .target-bar>div{background:var(--danger)}.target-clock.over span{color:var(--danger);font-weight:800}.iso-diagram{flex-shrink:0}.confirm-inline{display:inline-flex;flex-wrap:wrap;align-items:center;gap:6px}.unit-lock{margin-top:12px;background:var(--surface);border:2px dashed var(--border);border-radius:var(--radius);padding:12px 16px;display:grid;gap:6px;justify-items:start}.unit-lock ul{margin:0;padding-left:1.2em;display:grid;gap:4px}.stage-chip{font-size:.75rem;font-weight:900;text-transform:var(--tt-label);letter-spacing:.05em;padding:2px 8px;border-radius:99px;background:var(--blue);color:#fff}.stage-chip.stage-solved{background:var(--accent)}code.alg.big-inline{font-size:1.3rem;padding:2px 10px}.account h3 .muted{font-weight:600}.account-form{display:flex;flex-direction:column;gap:10px;margin-top:8px;max-width:420px}.account-form label{display:flex;flex-direction:column;gap:4px;font-weight:700}.account-form .input{flex:none;width:100%}.account .setting{border-bottom:none;padding-top:0}.scramble-hint{margin:4px 0 8px}.dialog-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#00000073;display:grid;place-items:center;padding:16px;z-index:100}.dialog{width:min(520px,100%);max-height:calc(100vh - 32px);overflow:auto;margin:0;display:grid;gap:10px}.dialog h3,.dialog p{margin:0}.dialog label{display:grid;gap:4px;font-weight:700}.dialog ul{padding-left:1.2em}.dialog code{word-break:break-all}.known-cubes{display:grid;gap:4px;justify-items:end;text-align:right}.fix-page{max-width:1100px}.fix-intro ul{padding-left:1.2em}.scan{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(260px,1fr);gap:24px;align-items:start}@media (max-width: 820px){.scan{grid-template-columns:1fr}}.scan-view{position:relative;border-radius:var(--radius);overflow:hidden;background:#111;aspect-ratio:4 / 3}.scan-view video{width:100%;height:100%;object-fit:cover;display:block}.scan-view video.mirrored{transform:scaleX(-1)}.scan-target{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);aspect-ratio:1;display:grid;grid-template-columns:repeat(3,1fr);border:3px solid #fff;border-radius:10px;box-shadow:0 0 0 999px #00000059}.scan-cell{border:1px solid rgba(255,255,255,.6);display:grid;place-items:center}.scan-cell span{width:34%;aspect-ratio:1;border-radius:50%;border:2px solid #fff;box-shadow:0 1px 3px #0009}.scan-up{position:absolute;left:50%;top:8px;transform:translate(-50%);padding:3px 12px;border-radius:99px;font-weight:800;font-size:.85rem;color:#1d1f24;border:2px solid #fff}.scan-error{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-items:center;padding:20px;background:#000000bf;color:#fff;text-align:center}.scan-side h2{margin:4px 0 8px}.scan-progress{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}.scan-progress .chip{font:inherit;display:inline-flex;align-items:center;gap:4px;padding:4px 8px;border-radius:99px;border:2px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;min-width:44px}.scan-progress .chip.on{border-color:var(--blue)}.scan-progress .chip i{width:14px;height:14px;border-radius:4px;border:1px solid rgba(0,0,0,.3)}.colour-word{font-weight:900;padding:0 6px;border-radius:6px;background:var(--c);color:#1d1f24;box-shadow:inset 0 0 0 1px #0003}.review{display:grid;grid-template-columns:1fr minmax(260px,420px);gap:28px;align-items:start}@media (max-width: 820px){.review{grid-template-columns:1fr}}.palette{display:flex;gap:8px;margin:10px 0}.palette button{width:34px;height:34px;border-radius:8px;border:2px solid rgba(0,0,0,.25);cursor:pointer}.palette button.on{outline:3px solid var(--blue);outline-offset:2px}.net{display:grid;grid-template-columns:repeat(4,minmax(0,96px));gap:6px;margin:12px 0}.net-face{position:relative;display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:#1d1f24;padding:3px;border-radius:6px}.net-sticker{aspect-ratio:1;border:0;border-radius:3px;cursor:pointer;padding:0}.net-sticker.centre{cursor:default;box-shadow:inset 0 0 0 2px #00000040}.net-sticker.bad{outline:3px solid #e8175d;outline-offset:-3px}.fix-mark{display:block;width:100%;height:100%;pointer-events:none}.fix-key{justify-content:center;margin-top:8px}.net-rescan{position:absolute;left:0;right:0;bottom:-18px;text-align:center;font-size:.72rem}.net{row-gap:24px}.player-moves.big .chip{font-family:ui-monospace,monospace;font-weight:800;font-size:1.05rem;padding:4px 10px;border-radius:8px;border:2px solid var(--border)}.player-moves.big .chip.done{color:var(--muted);background:var(--surface-2)}.player-moves.big .chip.next{border-color:#e8175d;color:#e8175d}.fix-done{text-align:center}.levels{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:16px 0}@media (max-width: 900px){.levels{grid-template-columns:1fr}}.level-title{margin:0 0 8px;font-size:1rem}.set-cards{display:grid;gap:8px}.set-card{font:inherit;text-align:left;display:grid;gap:4px;padding:10px 12px;border-radius:14px;border:2px solid var(--border);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer}.set-card.on{border-color:var(--blue);background:color-mix(in srgb,var(--blue) 8%,var(--surface))}.set-head{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}.pill.start{margin-left:auto;font-size:.7rem;font-weight:900;padding:2px 8px;border-radius:99px;background:var(--accent);color:#fff}.set-progress{height:6px;border-radius:99px;background:var(--surface-2);overflow:hidden}.set-progress>span{display:block;height:100%;background:var(--accent)}.set-intro h2{margin:0 0 4px}.set-intro p{margin:0 0 10px}.diff{font-size:.68rem;font-weight:800;padding:1px 7px;border-radius:99px;text-transform:uppercase;letter-spacing:.04em}.diff{color:var(--text)}.diff.easy{background:color-mix(in srgb,#58cc02 32%,transparent)}.diff.medium{background:color-mix(in srgb,#ff9600 36%,transparent)}.diff.hard{background:color-mix(in srgb,#ff4b4b 34%,transparent)}.goal-box{background:color-mix(in srgb,var(--accent) 12%,var(--surface));border:2px solid color-mix(in srgb,var(--accent) 40%,transparent);border-radius:14px;padding:10px 14px;margin:10px 0}.goal-box p{margin:0}.goal-box .eyebrow{margin-bottom:2px}.trainer-steps{padding-left:1.3em;margin:8px 0;color:var(--text-2, var(--muted))}.trainer-steps li{margin-bottom:4px}.broke-box{margin:10px 0}.broke-box p{margin:0 0 8px}.sync-dialog{width:min(1100px,100%)}.sync-dialog h3{margin:0}.sync-choices{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px}.sync-choices .card{margin:0;display:grid;gap:8px;align-content:start}.sync-choices h4{margin:0}.sync-dialog .scan,.sync-dialog .review{margin-top:8px}.sync-done{display:grid;justify-items:center;text-align:center;gap:6px;padding:12px 0}.sync-done p{margin:0 0 8px}.guide{background:color-mix(in srgb,var(--accent) 10%,var(--surface));border:2px solid color-mix(in srgb,var(--accent) 45%,transparent);border-radius:14px;padding:12px 14px;margin:12px 0;display:grid;gap:8px}.guide p{margin:0}.guide-head{font-weight:900;display:inline-flex;align-items:center;gap:8px;flex-wrap:wrap}.guide-where{font-weight:700}.guide-next{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:1.05rem}.guide-next code.alg.big-inline{font-size:1.6rem;padding:4px 14px;border:2px solid #e8175d;color:#e8175d}.guide-cheer{font-weight:900;color:var(--accent-dark)}.guide-wrong{background:color-mix(in srgb,#ff4b4b 12%,var(--surface));border-radius:10px;padding:8px 10px;display:grid;gap:6px}.wrong-box{background:color-mix(in srgb,#ff4b4b 12%,var(--surface));border-color:color-mix(in srgb,#ff4b4b 45%,transparent)}.plain-moves{margin:6px 0 0;padding-left:1.2em}.gyro-banner{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap;padding:8px 12px;margin-bottom:8px;border-radius:12px;background:color-mix(in srgb,var(--gold) 20%,var(--surface));border:2px solid color-mix(in srgb,var(--gold) 55%,transparent);font-weight:700}.hold-check{background:color-mix(in srgb,var(--blue) 10%,var(--surface));border:2px solid color-mix(in srgb,var(--blue) 35%,transparent);border-radius:14px;padding:12px 14px;margin:12px 0}.hold-check ol{margin:8px 0;padding-left:1.3em}.hold-check li.now{font-weight:800}.hold-check li.done{color:var(--muted);text-decoration:line-through}.hold-check p{margin:4px 0 0}.unread-note{margin:0 0 10px;padding:8px 10px;border-radius:10px;background:color-mix(in srgb,var(--gold) 18%,var(--surface))}.opened-note{margin:0 0 10px;color:var(--text-2)}.stage-note{margin:8px 0;padding:8px 12px;border-radius:10px;background:var(--surface-2)}.stage-note p{margin:0 0 4px}.mgroups{display:inline-flex;flex-wrap:wrap;gap:6px;font-family:JetBrains Mono,monospace;font-size:1.25rem;font-weight:700;line-height:1.3}.mgroup{background:var(--surface);border:2px solid var(--border);border-radius:10px;padding:2px 9px;white-space:nowrap}.mgroup.top{border-style:dashed;color:var(--text-2)}@media (max-width: 820px){.mgroup{white-space:normal}}.mgroup.blank{font:inherit;color:var(--muted);background:var(--surface-2);cursor:pointer;letter-spacing:1px}.mgroup.blank:hover,.mgroup.blank:focus-visible{border-color:var(--blue);color:var(--text-2)}.faded-alg p{margin:6px 0 0}.case-facts{display:grid;gap:6px;margin:4px 0 8px}.case-facts p{margin:0}.case-facts b{color:var(--text-2);font-weight:800}.today-practice{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin:12px 0}.today-practice h2{margin:2px 0 4px}.today-practice .btn.big{min-height:56px;padding:0 28px;font-size:1.1rem}.practice-settings{margin:4px 0 12px;align-items:center}.practice-settings .toggle{display:inline-flex;gap:8px;align-items:center;cursor:pointer}.practice-unit{margin-top:22px;border-left:4px solid var(--unit-line);padding-left:12px}.practice-unit .unit-name{margin:0 0 8px;font-size:1.15rem}.set-block{margin:10px 0 18px}.set-block-head{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:flex-start;margin-bottom:8px}.set-block-head h3{margin:0}.set-block-head p{margin:2px 0}.case-group+.case-group{margin-top:14px}.case-group-name{margin:6px 0 8px;font-size:1rem}.case-group-name .muted{font-weight:600}.setup-insert{display:grid;gap:6px}.setup-insert .cube-view{max-height:34vh;max-width:34vh;margin:0 auto}.case-card{font:inherit;display:flex;flex-direction:column;align-items:center;gap:4px;padding:10px 8px;border-radius:14px;border:2px solid var(--border-ctl);border-bottom-width:4px;background:var(--surface);color:var(--text);cursor:pointer;text-align:center;min-height:112px}.case-card b{line-height:1.2}.case-card.st-learning{border-bottom-color:var(--danger)}.case-card.st-reviewing{border-bottom-color:#ff9600}.case-card.st-known{border-bottom-color:var(--accent)}.status-word{font-size:.75rem;font-weight:800;color:var(--text-2)}.status-word.known{color:var(--accent)}.coming-up{margin-top:20px}.coming-up ul{margin:8px 0 0;padding-left:1.2em;display:grid;gap:4px}.case-sheet{display:grid;gap:10px}.case-sheet p{margin:0}.case-sheet .other-alg{margin:4px 0}.alg-note{border-left:4px solid var(--blue);background:color-mix(in srgb,var(--blue) 10%,transparent);border-radius:8px;padding:6px 10px;margin:6px 0}.alg-note p{margin:0}.name-it{display:grid;gap:6px}@media (max-width: 520px){.case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mgroups{font-size:1.15rem}}.ll-diagram .front-tick{fill:var(--text-2)}.mapcube{display:flex;align-items:center;gap:16px;margin:0;padding:10px 18px 10px 6px;overflow:hidden}.mapcube.solved{border-color:color-mix(in srgb,var(--gold) 55%,var(--border));background:color-mix(in srgb,var(--gold) 9%,var(--surface))}.mapcube-cube{flex:0 0 auto;width:176px;height:176px}.mapcube-cube .cube-view{width:100%;height:100%;max-height:none;aspect-ratio:auto;background:none;border:0;border-radius:0}.mapcube-cube .cube-canvas canvas{touch-action:pan-y!important}.mapcube-cube .cube-canvas canvas:active{cursor:grabbing}.mapcube-cube .cube-recenter{display:none}.mapcube-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:4px}.mapcube-head{font-size:1.3rem;font-weight:900;line-height:1.2;text-wrap:balance}.mapcube-count{display:flex;align-items:center;gap:10px}.mapcube-bar{flex:1;max-width:240px;height:8px;border-radius:99px;background:var(--surface-2);overflow:hidden}.mapcube-bar>span{display:block;height:100%;border-radius:99px;background:var(--accent);transition:width .4s}.mapcube.solved .mapcube-bar>span{background:var(--gold)}.mapcube-count .mono{color:var(--text-2);white-space:nowrap}.mapcube-next{margin:2px 0 0;color:var(--text-2)}.mapcube-next b{color:var(--text);white-space:nowrap}.mapcube-note{margin:0}.mapcube-note .link{white-space:nowrap}@media (max-width: 480px){.mapcube{gap:8px;padding:8px 12px 8px 2px}.mapcube-cube{width:148px;height:148px}.mapcube-head{font-size:1.05rem}.mapcube-count{gap:8px}}@media (prefers-reduced-motion: reduce){.mapcube-bar>span{transition:none}}:root[data-experience=beginner]{--fs-root: 112.5%;--fs-body: 20px;--lh-body: 1.6;--fs-read: 1.5rem;--fs-floor: 16px;--tt-label: none;--gap: 12px;--pad-card: 20px;--gap-step: 24px;--gap-options: 16px;--radius: 24px;--radius-ctl: 20px;--tap-min: 56px;--btn-pad: 14px 24px;--btn-pad-lg: 16px 32px;--lesson-cols: minmax(260px, 2fr) minmax(360px, 3fr);--cube-max-h: 62vh;--nav-clear: 104px;--sticky-top: 92px;--progress-h: 20px;--edge-ring: inset 0 0 0 2px var(--border-ctl);--nav-active-bar: inset 0 4px 0 var(--blue);--fw-nav-active: 900;--bg: #fff8e6;--surface: #ffffff;--surface-2: #ffefc2;--border: #eadfc0;--border-ctl: #858a93;--text: #1f2328;--text-2: #3b4048;--muted: #5a5f68;--accent-dark: #2a6f00;--on-accent: #0f2d00;--blue: #0b62a8;--danger: #c22525;--oops: #a35200;--star-edge: #946c00}@media (max-width: 820px){:root[data-experience=beginner]{--cube-max-h: 44vh}}@media (max-width: 760px){:root[data-experience=beginner]{--fs-read: 1.2222rem}}@media (prefers-color-scheme: dark){:root[data-experience=beginner]:not([data-theme=light]){--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--border-ctl: #7a808a;--text: #eef0f2;--text-2: #c3c8ce;--muted: #a8afb8;--accent-dark: #4caf02;--on-accent: #0f2d00;--blue: #1cb0f6;--danger: #d93636;--oops: #ffc800;--star-edge: transparent}}:root[data-experience=beginner][data-theme=dark]{--bg: #131619;--surface: #1c2025;--surface-2: #252a31;--border: #333a42;--border-ctl: #7a808a;--text: #eef0f2;--text-2: #c3c8ce;--muted: #a8afb8;--accent-dark: #4caf02;--on-accent: #0f2d00;--blue: #1cb0f6;--danger: #d93636;--oops: #ffc800;--star-edge: transparent}:root[data-experience=beginner][data-motion=reduced] *,:root[data-experience=beginner][data-motion=reduced] *:before,:root[data-experience=beginner][data-motion=reduced] *:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}:root[data-experience=beginner]{scroll-padding-top:var(--sticky-top)}:root[data-experience=beginner] .brand{display:inline-flex;align-items:center;gap:8px;min-height:var(--tap-min);border-radius:12px}:root[data-experience=beginner] .brand .cubby,:root[data-experience=beginner] .brand .cubby *{animation:none!important}:root[data-experience=beginner] .mainnav a{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:8px}:root[data-experience=beginner] .mainnav .icon{flex:none}:root[data-experience=beginner] .mainnav a:focus-visible,:root[data-experience=beginner] .brand:focus-visible{outline:3px solid var(--text);outline-offset:3px}:root[data-experience=beginner] .nav-dot{position:absolute;top:6px;right:6px;width:12px;height:12px;border-radius:50%;background:var(--accent-dark);box-shadow:0 0 0 2px var(--surface)}:root[data-experience=beginner] .nav-dot-words{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}@media (max-width: 960px){:root[data-experience=beginner] .brand span{display:inline;position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}}@media (max-width: 760px){:root[data-experience=beginner]{--tabbar-offset: calc(78px + env(safe-area-inset-bottom)) ;scroll-padding-bottom:var(--nav-clear)}:root[data-experience=beginner] .mainnav{display:grid;grid-auto-flow:column;grid-auto-columns:minmax(0,1fr);gap:4px}:root[data-experience=beginner] .mainnav a{flex-direction:column;gap:2px;min-height:64px;min-width:0;padding:4px 2px;line-height:1.2}:root[data-experience=beginner] .mainnav a:focus-visible{outline-offset:-3px}:root[data-experience=beginner] .nav-dot{top:4px;right:calc(50% - 26px)}}:root[data-experience=beginner] :focus-visible:not([tabindex="-1"]),:root[data-experience=beginner] [role=radio]:focus-visible{outline:3px solid var(--text);outline-offset:3px}:root[data-experience=beginner] .brand{color:var(--accent-dark)}:root[data-experience=beginner] .topbar{flex-wrap:wrap;row-gap:4px}@media (max-width: 760px){:root[data-experience=beginner]:has(.bmap){scroll-padding-bottom:calc(var(--nav-clear) + var(--map-dock-h, 0px))}}:root[data-experience=beginner] .option.right:after{content:" ✓";font-weight:900}:root[data-experience=beginner] .option.wrong:after{content:" ✗";font-weight:900}:root[data-experience=beginner] .cube-peek{position:absolute;bottom:8px;z-index:2;display:grid;place-items:center;width:var(--tap-min);height:var(--tap-min);padding:0;border:2px solid var(--border-ctl);border-radius:12px;background:var(--surface);color:var(--text);cursor:pointer}:root[data-experience=beginner] .cube-peek.is-left{left:8px}:root[data-experience=beginner] .cube-peek.is-right{right:8px}.b-sr{position:absolute;width:1px;height:1px;margin:-1px;padding:0;border:0;overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap}