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80%,transparent);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border:1px solid var(--color-rule);border-radius:var(--radius-sm);font-family:var(--font-mono);font-variant-numeric:tabular-nums;pointer-events:none}.canvas-overlay__label{font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.canvas-overlay__label:before{content:"// ";color:var(--color-fg-faint)}.canvas-overlay__value{font-size:var(--size-base);font-weight:600;color:var(--color-accent)}.lesson-statusbar{position:fixed;left:0;right:0;bottom:0;z-index:50;background:color-mix(in srgb,var(--color-bg) 82%,transparent);border-top:1px solid var(--color-rule);backdrop-filter:blur(12px) saturate(140%);-webkit-backdrop-filter:blur(12px) saturate(140%);transition:border-color var(--duration-base) var(--ease-out),box-shadow var(--duration-base) var(--ease-out)}.lesson-statusbar.is-anchor{border-top-color:var(--color-accent);box-shadow:0 -1px 0 var(--color-accent),0 -12px 24px -16px var(--color-accent)}.lesson-statusbar__inner{max-width:var(--content-full);margin:0 auto;padding:var(--space-3) var(--space-6);display:grid;grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:center;gap:var(--space-4)}.lesson-statusbar__btn{justify-self:start;font-family:var(--font-mono);font-size:var(--size-sm);font-weight:500;letter-spacing:.01em;color:var(--color-fg);background:transparent;border:1px solid var(--color-rule-strong);padding:var(--space-2) var(--space-4);border-radius:var(--radius-sm);cursor:pointer;transition:border-color var(--duration-fast) var(--ease-out),color var(--duration-fast) var(--ease-out),background var(--duration-fast) var(--ease-out)}.lesson-statusbar__btn--next{justify-self:end}.lesson-statusbar__btn:hover:not(:disabled),.lesson-statusbar__btn:focus-visible:not(:disabled){border-color:var(--color-accent);color:var(--color-accent);outline:none}.lesson-statusbar__btn:disabled{opacity:.32;cursor:not-allowed}.lesson-statusbar__center{display:flex;flex-direction:column;align-items:center;gap:6px;min-width:0}.lesson-statusbar__label{font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em;white-space:nowrap;transition:color var(--duration-base) var(--ease-out)}.lesson-statusbar.is-anchor .lesson-statusbar__label{color:var(--color-accent)}.lesson-statusbar__dots{display:flex;align-items:center;gap:8px;list-style:none;margin:0;padding:0}.lesson-statusbar__dot{width:8px;height:8px;border-radius:999px;border:1px solid var(--color-rule-strong);background:transparent;transition:background var(--duration-fast) var(--ease-out),border-color var(--duration-fast) var(--ease-out),transform var(--duration-fast) var(--ease-out)}.lesson-statusbar__dot--past{background:var(--color-fg-muted);border-color:var(--color-fg-muted)}.lesson-statusbar__dot--current{background:var(--color-accent);border-color:var(--color-accent);transform:scale(1.25)}.lesson-statusbar__dot--anchor{border-radius:0;transform:rotate(45deg)}.lesson-statusbar__dot--anchor.lesson-statusbar__dot--current{transform:rotate(45deg) scale(1.25)}.anchor{margin-top:var(--space-5);padding:var(--space-5);background:var(--color-bg-raised);border:1px solid var(--color-rule);border-radius:var(--radius-sm);position:relative;transition:background var(--duration-base) var(--ease-out),border-color var(--duration-base) var(--ease-out)}.anchor:before{content:"// anchor";display:block;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);margin-bottom:var(--space-3);letter-spacing:.02em}.anchor--accepted{border-color:var(--color-success);background:var(--color-success-soft)}.anchor--accepted:before{content:"// anchor ✓";color:var(--color-success)}.anchor--accepted .anchor__input,.anchor--accepted .anchor__submit{display:none}.anchor--rejected{border-color:var(--color-danger)}.anchor--rejected:before{content:"// anchor ✗";color:var(--color-danger)}.anchor__prompt{font-family:var(--font-body);font-size:var(--size-md);line-height:var(--leading-relaxed);color:var(--color-fg);margin-bottom:var(--space-4)}.anchor__prompt p{margin:0}.anchor__form{display:flex;align-items:center;gap:var(--space-3);flex-wrap:wrap}.anchor__input{font-family:var(--font-mono);font-size:var(--size-md);font-weight:500;padding:var(--space-2) var(--space-3);width:8rem;background:var(--color-bg);border:1px solid var(--color-rule-strong);border-radius:var(--radius-sm);color:var(--color-fg);font-variant-numeric:tabular-nums;transition:border-color var(--duration-fast) var(--ease-out)}.anchor__input:focus{outline:none;border-color:var(--color-accent)}.anchor__input:disabled{opacity:.6;background:var(--color-bg-sunken)}.anchor__submit{font-family:var(--font-mono);font-size:var(--size-sm);font-weight:600;padding:var(--space-2) var(--space-5);background:var(--color-accent);color:var(--color-on-accent);border:1px solid var(--color-accent);border-radius:var(--radius-sm);cursor:pointer;transition:all var(--duration-fast) var(--ease-out)}.anchor__submit:hover:not(:disabled){background:var(--color-accent-deep);border-color:var(--color-accent-deep)}.anchor__submit:disabled{background:var(--color-bg-sunken);color:var(--color-fg-faint);border-color:var(--color-rule);cursor:not-allowed}.anchor__feedback{font-family:var(--font-mono);font-size:var(--size-sm);color:var(--color-fg-muted)}.anchor--accepted .anchor__feedback{color:var(--color-success);font-weight:600}.anchor--rejected .anchor__feedback{color:var(--color-danger)}.anchor__no-config{color:var(--color-danger);font-family:var(--font-mono);font-size:var(--size-sm)}.anchor__next{display:inline-flex;align-items:center;margin-top:var(--space-4);padding:var(--space-2) var(--space-4);background:var(--color-accent);color:var(--color-on-accent);border:1px solid var(--color-accent);border-radius:var(--radius-sm);font-family:var(--font-mono);font-size:var(--size-sm);font-weight:600;text-decoration:none;transition:background var(--duration-fast) var(--ease-out)}.anchor__next:hover,.anchor__next:focus{background:var(--color-accent-deep);border-color:var(--color-accent-deep)}.scrubber{display:inline-flex;align-items:center;gap:var(--space-3);font-family:var(--font-mono);font-size:var(--size-sm);color:var(--color-fg-muted)}.scrubber__label{color:var(--color-accent);min-width:1.5em;font-weight:600}.scrubber__slider{width:12rem;accent-color:var(--color-accent)}.scrubber__number{width:4.5rem;padding:var(--space-1) var(--space-2);background:var(--color-bg);border:1px solid var(--color-rule-strong);border-radius:var(--radius-sm);color:var(--color-fg);font-family:var(--font-mono);font-variant-numeric:tabular-nums;text-align:right}.scrubber__number:focus{outline:none;border-color:var(--color-accent)}.live-readout{display:inline-flex;align-items:baseline;gap:var(--space-2);padding:var(--space-1) var(--space-3);font-family:var(--font-mono);font-size:var(--size-sm);color:var(--color-fg);background:var(--color-bg-raised);border:1px solid var(--color-rule);border-radius:var(--radius-sm);font-variant-numeric:tabular-nums}.live-readout__label{color:var(--color-fg-muted)}.live-readout__value{color:var(--color-accent);font-weight:600}.MafsView text{font-family:var(--font-mono);fill:var(--color-fg-muted)}.MafsView .mafs-grid line{stroke:var(--color-rule);opacity:.6}.MafsView .mafs-axis line{stroke:var(--color-fg-muted)}.variable-box{font-family:var(--font-mono);color:var(--color-fg)}.chain-machine{display:flex;flex-direction:column;align-items:stretch;gap:var(--space-5);padding:var(--space-3) 0;font-family:var(--font-mono);color:var(--color-fg)}.chain-machine__pipeline{display:flex;align-items:center;justify-content:center;gap:var(--space-3);flex-wrap:wrap}.chain-machine__io{display:flex;flex-direction:column;align-items:center;gap:2px;padding:var(--space-2) var(--space-3);min-width:4rem;background:var(--color-bg);border:1px solid var(--color-rule-strong);border-radius:var(--radius-sm);font-variant-numeric:tabular-nums}.chain-machine__io--intermediate{border-color:var(--color-accent);background:var(--color-accent-soft);color:var(--color-accent-deep)}.chain-machine__io--output{border-width:2px}.chain-machine__io-label{font-size:var(--size-xs);color:var(--color-fg-muted);letter-spacing:.04em}.chain-machine__io--intermediate .chain-machine__io-label{color:var(--color-accent-deep)}.chain-machine__io-value{font-size:1.15rem;font-weight:600;color:var(--color-fg)}.chain-machine__io--intermediate .chain-machine__io-value{color:var(--color-accent-deep)}.chain-machine__arrow{font-size:1.25rem;color:var(--color-fg-faint)}.chain-machine__box{padding:var(--space-3) var(--space-4);background:var(--color-bg-raised);border:1px solid var(--color-rule-strong);border-radius:var(--radius-sm);font-weight:600;font-size:var(--size-sm);color:var(--color-fg)}.chain-machine__slopes{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:var(--space-3);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.chain-machine__slope{display:inline-flex;flex-direction:column;align-items:center;gap:2px;padding:0 var(--space-2)}.chain-machine__slope-sep{font-size:var(--size-base);color:var(--color-fg-muted)}.chain-machine__slope-label{font-size:var(--size-xs);color:var(--color-fg-muted);letter-spacing:.02em}.chain-machine__slope-value{font-size:var(--size-base);font-weight:600;color:var(--color-fg);font-variant-numeric:tabular-nums}.chain-machine__slope--product .chain-machine__slope-value{color:var(--color-accent)}.chain-machine__compare{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3) var(--space-4);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm);font-size:var(--size-sm)}.chain-machine__compare-row{display:flex;justify-content:space-between;align-items:baseline;gap:var(--space-3)}.chain-machine__compare-label{color:var(--color-fg-muted)}.chain-machine__compare-value{font-weight:600;font-variant-numeric:tabular-nums;color:var(--color-fg)}.chain-machine__compare-verdict{font-size:var(--size-xs);letter-spacing:.04em;margin-top:var(--space-1)}.chain-machine__compare-verdict--diff{color:var(--color-danger)}.chain-machine__compare-verdict--equal{color:var(--color-fg-faint)}.chain-machine__wiggle{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.chain-machine__wiggle-btn{align-self:flex-start;font-family:var(--font-mono);font-size:var(--size-xs);font-weight:600;color:var(--color-accent);background:transparent;border:1px solid var(--color-accent);border-radius:var(--radius-sm);padding:var(--space-1) var(--space-3);cursor:pointer;transition:background var(--duration-fast) var(--ease-out),color var(--duration-fast) var(--ease-out)}.chain-machine__wiggle-btn:hover,.chain-machine__wiggle-btn:focus-visible{background:var(--color-accent);color:var(--color-on-accent);outline:none}.chain-machine__wiggle-tracks{display:flex;flex-direction:column;gap:var(--space-2)}.chain-machine__wiggle-track{display:grid;grid-template-columns:6.5rem 1fr 4rem;align-items:center;gap:var(--space-3)}.chain-machine__wiggle-track-label{font-size:var(--size-xs);color:var(--color-fg-muted);letter-spacing:.02em;text-align:right}.chain-machine__wiggle-track-line{position:relative;height:14px;border-bottom:1px dashed var(--color-rule);display:flex;align-items:center}.chain-machine__wiggle-arrow{display:block;height:6px;background:var(--color-accent);border-radius:2px;width:0;animation:chain-wiggle-grow .7s var(--ease-out) forwards;transform-origin:left center}@keyframes chain-wiggle-grow{0%{width:0;opacity:0}to{opacity:1}}.chain-machine__wiggle-track-factor{font-size:var(--size-xs);font-weight:600;font-variant-numeric:tabular-nums;color:var(--color-accent)}.chain-machine__plot{display:flex;flex-direction:column;gap:var(--space-2)}.chain-machine__plot-label{margin:0;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.chain-machine__io--concealed .chain-machine__io-value,.chain-machine__slope--concealed .chain-machine__slope-value{color:var(--color-fg-faint)}.chain-machine__io-value,.chain-machine__slope-value,.chain-machine__compare-value,.canvas-overlay__value{transition:color var(--duration-base) var(--ease-out)}.chain-machine__wiggle--concealed{align-items:center;text-align:center}.chain-machine__wiggle-placeholder{margin:0;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.canvas-overlay__readout--concealed .canvas-overlay__value{color:var(--color-fg-faint)}.stretch-pipeline{display:flex;flex-direction:column;gap:var(--space-3);padding:var(--space-3) 0;font-family:var(--font-mono);color:var(--color-fg)}.stretch-pipeline__readouts{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:var(--space-2) var(--space-3);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.stretch-pipeline__readout{display:inline-flex;flex-direction:column;align-items:center;gap:2px;padding:0 var(--space-2);min-width:4.5rem}.stretch-pipeline__readout-label{font-size:var(--size-xs);color:var(--color-fg-muted);letter-spacing:.04em}.stretch-pipeline__readout-value{font-size:var(--size-base);font-weight:600;font-variant-numeric:tabular-nums;color:var(--color-fg)}.stretch-pipeline__readout--accent .stretch-pipeline__readout-value{color:var(--color-accent)}.stretch-pipeline__readout--bold .stretch-pipeline__readout-value{color:var(--color-accent-deep);font-size:1.15rem}.stretch-pipeline__op{font-size:1.1rem;color:var(--color-fg-faint);align-self:center}.stretch-pipeline__stage{display:flex;flex-direction:column;gap:4px;padding:var(--space-3);background:var(--color-bg-raised);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.stretch-pipeline__stage[data-tone=intermediate]{border-color:color-mix(in srgb,var(--mafs-blue) 40%,var(--color-rule))}.stretch-pipeline__stage[data-tone=output]{border-color:color-mix(in srgb,var(--mafs-violet) 50%,var(--color-rule))}.stretch-pipeline__stage-row{display:flex;align-items:center;gap:var(--space-3)}.stretch-pipeline__stage-label{font-weight:600;font-size:1.1rem;color:var(--color-fg);min-width:2.5rem}.stretch-pipeline__stage-value{font-size:var(--size-sm);font-variant-numeric:tabular-nums;color:var(--color-fg-muted)}.stretch-pipeline__stage-caption{font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.02em;padding-left:2.7rem}.stretch-pipeline__stage-caption:before{content:"// ";color:var(--color-fg-faint)}.stretch-pipeline__bar{height:18px;min-width:2px;border-radius:2px;transition:width var(--duration-base) var(--ease-out)}.stretch-pipeline__bar--input{background:var(--mafs-orange)}.stretch-pipeline__bar--intermediate{background:var(--mafs-blue)}.stretch-pipeline__bar--output{background:var(--mafs-violet)}.stretch-pipeline__operator{display:flex;align-items:center;gap:var(--space-3);padding-left:var(--space-3);font-size:var(--size-sm);color:var(--color-fg-muted);font-variant-numeric:tabular-nums}.stretch-pipeline__operator strong{color:var(--color-accent);font-weight:600}.stretch-pipeline__operator-arrow{font-size:1.2rem;color:var(--color-fg-faint)}.zoom-into-curve,.vector-arena{display:flex;flex-direction:column;gap:var(--space-3)}.vector-arena__readouts{position:absolute;top:var(--space-2);left:var(--space-2);z-index:1;display:flex;flex-direction:column;gap:var(--space-1);pointer-events:none}.vector-arena__controls{display:flex;justify-content:center;padding:var(--space-2) 0}.vector-arena__dot{border-left-width:2px;transition:border-color var(--duration-base) var(--ease-out)}.vector-arena__dot--pos{border-left-color:var(--color-success)}.vector-arena__dot--pos .canvas-overlay__value{color:var(--color-success)}.vector-arena__dot--neg{border-left-color:var(--color-danger)}.vector-arena__dot--neg .canvas-overlay__value{color:var(--color-danger)}.vector-arena__dot--zero .canvas-overlay__value,.vector-arena__dot.canvas-overlay__readout--concealed .canvas-overlay__value{color:var(--color-fg-faint)}.matrix-playground{display:flex;flex-direction:column;gap:var(--space-4);font-family:var(--font-mono);color:var(--color-fg)}.matrix-playground__entries{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.matrix-playground__entries-title{margin:0;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.matrix-playground__entries-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-2) var(--space-4)}.matrix-playground__grids{display:flex;flex-direction:column;gap:var(--space-3)}.matrix-playground__panel{display:flex;flex-direction:column;gap:var(--space-1)}.matrix-playground__panel-label{margin:0;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.matrix-playground__canvas{position:relative}.matrix-playground__readouts{display:flex;flex-wrap:wrap;gap:var(--space-2)}.matrix-playground__readouts .canvas-overlay__readout{position:static}.matrix-playground__composed{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid var(--color-rule);border-radius:var(--radius-sm)}.matrix-playground__composed-label{margin:0;font-family:var(--font-mono);font-size:var(--size-xs);color:var(--color-fg-faint);letter-spacing:.04em}.matrix-playground__composed-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-1) var(--space-3);align-self:flex-start;padding:var(--space-2) var(--space-3);border-left:2px solid var(--color-rule-strong);border-right:2px solid var(--color-rule-strong)}.matrix-playground__composed-cell{font-family:var(--font-mono);font-variant-numeric:tabular-nums;font-size:var(--size-base);font-weight:600;color:var(--color-accent);min-width:3rem;text-align:right;transition:color var(--duration-base) var(--ease-out)}.matrix-playground__composed-cell--concealed{color:var(--color-fg-faint)}.loss-landscape{display:flex;flex-direction:column;gap:var(--space-3);font-family:var(--font-mono);color:var(--color-fg)}.loss-landscape__sliders{display:flex;flex-direction:column;gap:var(--space-2);padding:var(--space-3);background:var(--color-bg-sunken);border:1px solid 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