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auto;display:grid}.task__quit{justify-content:center;width:100%}.task__module-box{padding:var(--space-6)}.task__module-title{align-items:center;gap:var(--space-2);margin:0 0 var(--space-4);color:var(--p-accent-hover);letter-spacing:-.04em;flex-wrap:wrap;font-size:1.28rem;font-weight:950;line-height:1.12;display:flex}.task__module-desc{color:var(--p-text-dim);font-size:.98rem;line-height:1.64}.puzzle__side__config{padding:var(--space-5)}.puzzle__side__config__toggle,.config__toggle{align-items:center;gap:var(--space-3);display:flex}.puzzle__side__config__toggle label,.config__toggle>label{color:var(--p-text-dim);cursor:pointer;font-weight:760}.task__center{align-content:start;justify-items:center;min-width:0;display:grid}.task__progress,.task__streak,.task__prompt-box,.task__input,.resolution__info{padding:var(--space-5)}.task__progress__text{margin-bottom:var(--space-4);color:var(--p-text);text-align:center;font-family:var(--font-mono);font-size:1.22rem;font-weight:950}.task__progress__bar{border-radius:var(--radius-round);background:color-mix(in srgb, var(--p-inset) 82%, transparent);height:10px;overflow:hidden}.task__progress__bar-fill{border-radius:inherit;background:linear-gradient(90deg, var(--p-primary), var(--p-accent));width:0;height:100%;box-shadow:0 0 18px color-mix(in srgb, var(--p-primary) 42%, transparent);transition:width var(--motion-med) var(--ease-out)}.task__streak{text-align:center}.task__streak__score{color:var(--p-primary-hover);letter-spacing:-.08em;font-size:clamp(3rem,7vw,5.2rem);font-weight:980;line-height:.9}.task__streak__label{margin-top:var(--space-2);color:var(--p-text-muted);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:.76rem;font-weight:900}.task__prompt-box{border-color:color-mix(in srgb, var(--p-primary) 52%, var(--p-border));box-shadow:var(--shadow-sm), 0 0 0 1px color-mix(in srgb, var(--p-primary) 10%, transparent)}.prompt__content{justify-content:center;align-items:center;gap:var(--space-3);min-height:4.5rem;color:var(--p-text);font-family:var(--font-mono);text-align:center;letter-spacing:-.04em;flex-wrap:wrap;font-size:clamp(1.45rem,2.6vw,2.35rem);font-weight:950;line-height:1.08;display:flex}.prompt__content.text-prompt{font-size:clamp(1.65rem,2.9vw,2.7rem)}.prompt__fork{gap:var(--space-2);justify-items:center;display:grid}.prompt__fork-row{justify-content:center;align-items:center;gap:var(--space-3);flex-wrap:wrap;display:inline-flex}.prompt__fork-row--compact{gap:var(--space-2);flex-wrap:nowrap}.prompt__hint{margin-top:var(--space-4);padding:var(--space-4);border:1px solid color-mix(in srgb, var(--p-primary) 40%, var(--p-border));border-radius:var(--radius-sm);background:color-mix(in srgb, var(--p-primary) 11%, var(--p-surface));color:var(--p-text-dim);font-size:.94rem;line-height:1.56}.task__input{gap:var(--space-3);display:grid}.choice-buttons{gap:var(--space-3);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.choice-btn,.coord-btn{border:1px solid var(--p-border-strong);border-radius:var(--radius-sm);background:var(--p-surface-interactive);color:var(--p-text);cursor:pointer;transition:transform var(--motion-fast) var(--ease-out), background var(--motion-fast) var(--ease-out), border-color var(--motion-fast) var(--ease-out), color var(--motion-fast) var(--ease-out), box-shadow var(--motion-fast) var(--ease-out);font-weight:900}.choice-btn{min-height:62px;padding:0 var(--space-4);font-size:1.02rem}.choice-btn:hover,.coord-btn:hover{border-color:var(--p-primary);color:var(--p-primary-hover);box-shadow:0 14px 34px color-mix(in srgb, var(--p-primary) 14%, transparent);transform:translateY(-1px)}.coord-pad{gap:var(--space-3);text-align:center;display:grid}.coord-display{min-height:3rem;color:var(--p-primary-hover);font-family:var(--font-mono);place-items:center;font-size:clamp(2rem,4vw,2.9rem);font-weight:950;line-height:1;display:grid}.coord-row{gap:var(--space-2);grid-template-columns:repeat(8,minmax(0,1fr));display:grid}.coord-btn{min-width:0;min-height:46px;font-family:var(--font-mono);padding:0;font-size:.92rem}.coord-clear-btn{width:100%;min-height:46px}.coord-clear-btn:disabled{opacity:.5;cursor:not-allowed}.coord-btn.selected{background:var(--p-primary);color:var(--p-on-primary);border-color:#0000}.keyboard-hint{margin-top:var(--space-2);color:var(--p-text-muted);text-align:center;font-size:.84rem}.keyboard-hint kbd{min-height:30px;padding:0 var(--space-2);border:1px solid var(--p-border);border-radius:var(--radius-xs);background:var(--p-surface-interactive);color:var(--p-text-dim);font-family:var(--font-mono);align-items:center;display:inline-flex}.task__actions{gap:var(--space-3);grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.task__actions .action-btn,.unlock-form__actions .action-btn{justify-content:center;align-items:center;display:inline-flex}.task__board.blindfolded,.task__board.blindfolded:before,.task__board.blindfolded:after,.blurred-board__svg{border-radius:var(--radius-xl)}.task__board.blindfolded{aspect-ratio:1;border:1px solid var(--p-border-strong);opacity:1;background:var(--p-surface-elevated);width:min(100%,590px);box-shadow:var(--shadow-lg), inset 0 0 0 1px var(--p-border-soft);position:relative;overflow:hidden}.task__board.blindfolded:before{content:"";background:repeating-conic-gradient(var(--board-dark) 0% 25%, var(--board-light) 0% 50%) 0 0/25% 25%;filter:blur(26px)saturate(.85);opacity:.56;z-index:0;position:absolute;inset:-12%}.task__board.blindfolded:after{content:"";border:2px solid color-mix(in srgb, var(--p-primary) 48%, transparent);background:linear-gradient(90deg, transparent 48%, color-mix(in srgb, var(--p-primary) 60%, transparent) 48% 52%, transparent 52%), linear-gradient(0deg, transparent 48%, color-mix(in srgb, var(--p-primary) 60%, transparent) 48% 52%, transparent 52%), radial-gradient(circle, color-mix(in srgb, var(--p-accent) 28%, var(--p-surface-elevated)), color-mix(in srgb, var(--p-primary) 12%, transparent) 66%);opacity:.58;pointer-events:none;z-index:2;border-radius:50%;width:52%;height:52%;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.blurred-board__svg{pointer-events:none;z-index:1;justify-content:center;align-items:center;display:flex;position:absolute;inset:0}.blurred-board__svg-el{visibility:visible;filter:blur(11px)saturate(.9);opacity:.92;width:125%;height:125%}.interactive-board-wrap{gap:var(--space-3);width:min(100%,590px);display:grid}.interactive-board-shell{aspect-ratio:1;place-items:center;width:100%;display:grid;position:relative}.interactive-board{--board-flip-duration:.72s;transform-origin:50%;will-change:transform;position:relative}.interactive-board.flipped{transform:none}.interactive-board.is-flipping{box-shadow:var(--shadow-lg)}.interactive-board.is-flipping.flip-to-black{animation:board-spin-to-black var(--board-flip-duration) linear both}.interactive-board.is-flipping.flip-to-white{animation:board-spin-to-white var(--board-flip-duration) linear both}@keyframes board-spin-to-black{0%{transform:rotate(0)}to{transform:rotate(180deg)}}@keyframes board-spin-to-white{0%{transform:rotate(0)}to{transform:rotate(-180deg)}}.board-orientation-strip{justify-content:space-between;align-items:center;gap:var(--space-3);min-height:44px;padding:0 var(--space-4);border:1px solid var(--p-border-strong);border-radius:var(--radius-round);background:var(--p-surface-elevated);color:var(--p-text);box-shadow:var(--shadow-xs);pointer-events:none;display:flex;position:relative}.board-orientation-strip span{color:var(--p-text-dim);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:.76rem;font-weight:900}.board-orientation-strip strong{color:var(--p-text);font-weight:950}.sr-only{clip:rect(0, 0, 0, 0)!important;white-space:nowrap!important;border:0!important;width:1px!important;height:1px!important;margin:-1px!important;padding:0!important;position:absolute!important;overflow:hidden!important}.resolution__board-wrap{aspect-ratio:1;width:min(100%,590px);display:inline-block;position:relative}.resolution__board.is2d{aspect-ratio:1;border:1px solid var(--p-border-strong);background:var(--p-inset);width:100%;box-shadow:var(--shadow-lg), inset 0 0 0 1px var(--p-border-soft);border-radius:0;grid-template-rows:repeat(8,1fr);grid-template-columns:repeat(8,1fr);display:grid;position:relative;overflow:hidden}.board__rank-label,.board__file-label,.board__corner{display:none}.board__sq{justify-content:center;align-items:center;display:flex;position:relative}.board__sq.light{background:var(--board-light)}.board__sq.dark{background:var(--board-dark)}.board__sq.interactive{cursor:pointer;transition:filter var(--motion-fast) var(--ease-out), box-shadow var(--motion-fast) var(--ease-out);border:0;padding:0}.board__sq.interactive:hover{filter:brightness(1.14)saturate(1.05);z-index:2;box-shadow:inset 0 0 0 3px var(--p-primary-hover)}.board__arrows{z-index:3;pointer-events:none;width:100%;height:100%;color:var(--target-ring);opacity:.96;position:absolute;inset:0}.board__arrow-shape{fill:currentColor;stroke:url(#arrow-stroke-grad);stroke-width:.02px;stroke-linejoin:round}.board__arrow-shape--coord-a{color:var(--marker-coord-a);stroke:currentColor;opacity:.78}.board__arrow-shape--coord-b{color:var(--marker-coord-b);stroke:currentColor;opacity:.8}.board__arrow-shape--solution{color:var(--marker-solution);stroke:currentColor;opacity:.82}.board__arrow-shape--path{color:var(--marker-path);stroke:currentColor;opacity:.58}.board__arrow-shape--pair{color:var(--marker-pair);stroke:currentColor;opacity:.74}.board__arrow-shape--wrong{color:var(--marker-wrong);stroke:currentColor;opacity:.55}.board__arrow-shape--good{color:var(--marker-solution);stroke:currentColor;opacity:.78}.board__arrow-shape--info{color:var(--marker-path);stroke:currentColor;opacity:.62}.board__arrow-shape--bad{color:var(--overlay-wrong);stroke:var(--overlay-wrong);opacity:.55}.board__sq.sq-target,.board__sq.sq-context{--target-stroke:2px;--target-rot:3s;--target-dir:normal;--target-light:#ffffffd1;--target-dark:#fff3;position:relative}.board__sq.sq-target{--target-stroke:3px;--target-light:#fffffffa;--target-dark:#ffffff3d}.board__sq.sq-context{--target-dir:reverse}.board__sq.sq-target:before,.board__sq.sq-context:before{content:"";padding:var(--target-stroke);background:conic-gradient(from var(--target-angle), var(--target-light), var(--target-dark), var(--target-light));-webkit-mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);-webkit-mask-composite:xor;-webkit-mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);animation:target-rotate var(--target-rot) linear infinite var(--target-dir);pointer-events:none;z-index:2;position:absolute;inset:0;-webkit-mask-composite:xor;mask-composite:exclude}.board__sq.sq-target:after{content:"";padding:calc(var(--target-stroke) + .5px);-webkit-mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);-webkit-mask-composite:xor;-webkit-mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);mask:linear-gradient(var(--p-text) 0 0) content-box, linear-gradient(var(--p-text) 0 0);pointer-events:none;z-index:1;background:#ffffffdb;position:absolute;inset:.5px;-webkit-mask-composite:xor;mask-composite:exclude}@property --target-angle{syntax:"<angle>";inherits:false;initial-value:0deg}@keyframes target-rotate{to{--target-angle:360deg}}.board__sq.sq-wrong{box-shadow:inset 0 0 0 3px color-mix(in srgb, var(--overlay-wrong) 80%, transparent), 0 0 14px color-mix(in srgb, var(--overlay-wrong) 42%, transparent)}.board__sq.sq-marker-coord-a{box-shadow:inset 0 0 0 4px color-mix(in srgb, var(--marker-coord-a) 88%, transparent), inset 0 0 26px var(--marker-coord-a-soft)}.board__sq.sq-marker-coord-b{box-shadow:inset 0 0 0 4px color-mix(in srgb, var(--marker-coord-b) 88%, transparent), inset 0 0 26px var(--marker-coord-b-soft)}.board__sq.sq-marker-solution{box-shadow:inset 0 0 0 4px color-mix(in srgb, var(--marker-solution) 88%, transparent), inset 0 0 28px var(--marker-solution-soft)}.board__sq.sq-marker-path{box-shadow:inset 0 0 0 3px color-mix(in srgb, var(--marker-path) 68%, transparent), inset 0 0 20px var(--marker-path-soft)}.board__sq.sq-marker-pair{box-shadow:inset 0 0 0 4px color-mix(in srgb, var(--marker-pair) 82%, transparent), inset 0 0 24px var(--marker-pair-soft)}.board__sq.sq-marker-wrong{box-shadow:inset 0 0 0 4px color-mix(in srgb, var(--marker-wrong) 86%, transparent), 0 0 14px var(--marker-wrong-soft)}.board__sq.hl-green{background:var(--overlay-correct)!important}.board__sq.hl-red{background:var(--overlay-wrong)!important}.board__sq.hl-blue{background:var(--overlay-hint)!important}.board__sq piece,.piece-icon{width:82%;height:82%;filter:drop-shadow(0 1px 0 color-mix(in srgb, var(--p-border-strong) 52%, transparent)) drop-shadow(0 5px 10px color-mix(in srgb, var(--p-shadow) 18%, transparent));background-position:50%;background-repeat:no-repeat;background-size:contain}.board__sq piece{z-index:5;position:absolute}.piece-icon{width:40px;height:40px;display:inline-block}.piece-prompt{vertical-align:top;grid-template-rows:auto auto;place-items:center;gap:.36rem;min-width:3.4rem;display:inline-grid}.piece-prompt .piece-icon{width:40px;height:40px}.piece-prompt .coord-box{min-width:3.1rem}.piece-icon.pawn.black{background-image:var(---black-pawn)}.piece-icon.knight.black{background-image:var(---black-knight)}.piece-icon.bishop.black{background-image:var(---black-bishop)}.piece-icon.rook.black{background-image:var(---black-rook)}.piece-icon.queen.black{background-image:var(---black-queen)}.piece-icon.king.black{background-image:var(---black-king)}:root[data-theme=dark] .piece-icon.pawn.black{background-image:var(---white-pawn)}:root[data-theme=dark] .piece-icon.knight.black{background-image:var(---white-knight)}:root[data-theme=dark] .piece-icon.bishop.black{background-image:var(---white-bishop)}:root[data-theme=dark] .piece-icon.rook.black{background-image:var(---white-rook)}:root[data-theme=dark] .piece-icon.queen.black{background-image:var(---white-queen)}:root[data-theme=dark] .piece-icon.king.black{background-image:var(---white-king)}.board__sq piece.pawn.black{background-image:var(---black-pawn)}.board__sq piece.knight.black{background-image:var(---black-knight)}.board__sq piece.bishop.black{background-image:var(---black-bishop)}.board__sq piece.rook.black{background-image:var(---black-rook)}.board__sq piece.queen.black{background-image:var(---black-queen)}.board__sq piece.king.black{background-image:var(---black-king)}.coord-box{--coord-marker:var(--p-primary-hover);--coord-marker-soft:var(--p-selection);min-width:3.1rem;min-height:2.55rem;padding:0 var(--space-3);border:1px solid color-mix(in srgb, var(--coord-marker) 58%, var(--p-border-strong));border-radius:var(--radius-sm);background:linear-gradient(180deg, color-mix(in srgb, var(--p-surface-elevated) 88%, var(--coord-marker-soft)), color-mix(in srgb, var(--p-surface-interactive) 78%, var(--coord-marker-soft))), var(--p-surface-interactive);color:var(--coord-marker);box-shadow:inset 0 0 0 1px color-mix(in srgb, var(--coord-marker) 12%, transparent), 0 8px 18px color-mix(in srgb, var(--coord-marker) 12%, transparent);justify-content:center;align-items:center;display:inline-flex;position:relative;overflow:hidden}.coord-box--coord-a{--coord-marker:var(--marker-coord-a);--coord-marker-soft:var(--marker-coord-a-soft)}.coord-box--coord-b{--coord-marker:var(--marker-coord-b);--coord-marker-soft:var(--marker-coord-b-soft)}.coord-box--solution{--coord-marker:var(--marker-solution);--coord-marker-soft:var(--marker-solution-soft)}.coord-box--path{--coord-marker:var(--marker-path);--coord-marker-soft:var(--marker-path-soft)}.coord-box--pair{--coord-marker:var(--marker-pair);--coord-marker-soft:var(--marker-pair-soft)}.coord-box--wrong{--coord-marker:var(--marker-wrong);--coord-marker-soft:var(--marker-wrong-soft)}.coord-box--diagonal{min-width:3.45rem}.coord-box__value{z-index:1;position:relative}.coord-box__glyph{color:var(--coord-marker);opacity:.16;pointer-events:none;place-items:center;font-size:2.55rem;font-weight:950;line-height:1;display:grid;position:absolute;inset:0;transform:translate(.42rem,.06rem)}.coord-box--coord-b .coord-box__glyph{transform:translate(.42rem,.14rem)}.prompt-arrow{color:var(--marker-path);font-family:var(--font-mono);margin:0 .18rem;font-size:1.5rem;font-weight:950;line-height:1}.prompt-arrow--coord-a{color:var(--marker-coord-a)}.prompt-arrow--coord-b{color:var(--marker-coord-b)}.prompt-arrow--solution{color:var(--marker-solution)}.prompt-arrow--path{color:var(--marker-path)}.prompt-arrow--pair{color:var(--marker-pair)}.prompt-arrow--wrong{color:var(--marker-wrong)}.prompt-separator{color:var(--p-text-muted)}.resolution__info{gap:var(--space-3);display:grid}.resolution__result{margin:0 0 var(--space-2);letter-spacing:-.075em;font-size:clamp(2.2rem,4.3vw,3.7rem);font-weight:980;line-height:.92}.resolution__result.correct{color:var(--p-success)}.resolution__result.wrong{color:var(--p-wrong)}.resolution__answer{color:var(--p-text-dim);margin:0;font-size:1rem}.resolution__answer strong{color:var(--p-text)}.resolution__learning-note{color:var(--p-text-dim);margin:0;line-height:1.55}.resolution__diagnostic-card{gap:var(--space-2);padding:var(--space-4);border:1px solid color-mix(in srgb, var(--p-primary) 34%, var(--p-border));border-left:4px solid var(--p-primary);border-radius:var(--radius-sheet);background:linear-gradient(135deg, color-mix(in srgb, var(--p-primary) 10%, transparent), color-mix(in srgb, var(--p-accent) 7%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 92%, var(--p-inset));text-align:left;display:grid}.resolution__diagnostic-card--first-anchor{border-color:color-mix(in srgb, var(--p-primary) 44%, var(--p-border));background:linear-gradient(135deg, color-mix(in srgb, var(--p-primary) 12%, transparent), color-mix(in srgb, var(--p-success) 6%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 94%, var(--p-inset));box-shadow:0 14px 34px color-mix(in srgb, var(--p-primary) 10%, transparent)}.resolution__diagnostic-card--square-color-map{border-color:color-mix(in srgb, var(--p-accent) 42%, var(--p-border));background:linear-gradient(135deg, color-mix(in srgb, var(--p-accent) 10%, transparent), color-mix(in srgb, var(--p-primary) 6%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 93%, var(--p-inset));box-shadow:0 12px 28px color-mix(in srgb, var(--p-accent) 8%, transparent)}.resolution__diagnostic-card--square-color-map-follow-up{border-color:color-mix(in srgb, var(--p-accent) 32%, var(--p-border));background:linear-gradient(135deg, color-mix(in srgb, var(--p-accent) 6%, transparent), color-mix(in srgb, var(--p-primary) 4%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 91%, var(--p-inset));box-shadow:none}.resolution__diagnostic-card--sister-symmetry{border-color:color-mix(in srgb, var(--p-primary) 38%, var(--p-accent));background:linear-gradient(135deg, color-mix(in srgb, var(--p-primary) 10%, transparent), color-mix(in srgb, var(--p-accent) 9%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 93%, var(--p-inset));box-shadow:0 12px 28px color-mix(in srgb, var(--p-primary) 8%, transparent)}.resolution__diagnostic-card--sister-symmetry-follow-up{border-color:color-mix(in srgb, var(--p-primary) 28%, var(--p-accent));background:linear-gradient(135deg, color-mix(in srgb, var(--p-primary) 6%, transparent), color-mix(in srgb, var(--p-accent) 5%, transparent)), color-mix(in srgb, var(--p-surface-elevated) 91%, var(--p-inset));box-shadow:none}.resolution__diagnostic-label{color:var(--p-primary-hover);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase;font-size:.68rem;font-weight:950}.resolution__diagnostic-card+.continue-btn{margin-top:var(--space-3)}@media (width<=640px){.resolution__diagnostic-card{gap:var(--space-1);padding:var(--space-3);border-radius:var(--radius-md)}.resolution__diagnostic-card--first-anchor,.resolution__diagnostic-card--square-color-map,.resolution__diagnostic-card--square-color-map-follow-up,.resolution__diagnostic-card--sister-symmetry,.resolution__diagnostic-card--sister-symmetry-follow-up{padding:var(--space-3)}.resolution__diagnostic-card .resolution__learning-note{font-size:.94rem;line-height:1.42}.resolution__diagnostic-card+.continue-btn{margin-top:var(--space-2)}}.continue-btn{margin-top:var(--space-4)}.continue-btn--first-anchor-resolution{box-shadow:var(--shadow-glow), 0 0 0 1px color-mix(in srgb, var(--p-primary) 34%, transparent), inset 0 1px #ffffff59}.continue-btn--square-color-map-resolution{box-shadow:var(--shadow-glow), 0 0 0 1px color-mix(in srgb, var(--p-accent) 32%, transparent), inset 0 1px 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piece.pawn.white{background-image:var(---white-pawn)}.resolution__board--tactics piece.knight.white{background-image:var(---white-knight)}.resolution__board--tactics piece.bishop.white{background-image:var(---white-bishop)}.resolution__board--tactics piece.rook.white{background-image:var(---white-rook)}.resolution__board--tactics piece.queen.white{background-image:var(---white-queen)}.resolution__board--tactics piece.king.white{background-image:var(---white-king)}.resolution__board--tactics .board__arrow-shape--solution,.resolution__board--tactics .board__arrow-shape--good{color:#187455;opacity:.9}.resolution__board--tactics .board__arrow-shape--wrong{color:#a43f50;opacity:.72}@media (width<=840px){.progression-hub,.progression-hub--expanded{width:calc(100% - 2 * var(--space-4));grid-template-columns:1fr 1fr}.progression-hub__quests{grid-column:1/-1;grid-template-columns:1fr}.progression-hub--expanded .progression-hub__quests{grid-template-columns:1fr}}@media 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