._placeholder_1on7n_5,._answerCheck_1on7n_6{flex:100%}._placeholder_1on7n_5{min-height:var(--control-height,44px)}._answerCheck_1on7n_6{gap:var(--space-3);width:100%;color:var(--pb-panel-ink);display:grid}._parts_1on7n_21{gap:var(--space-4);display:grid}._part_1on7n_21{gap:var(--space-1)}._inputRow_1on7n_30{--answer-box-height:3.25rem;align-items:center;gap:var(--space-2);display:flex}._inputRow_1on7n_30 input{min-width:0;font-family:var(--font-mono,ui-monospace, SFMono-Regular, Menlo, monospace);flex:auto}._mathHost_1on7n_48{flex:auto;min-width:0;display:flex}._mathField_1on7n_54{box-sizing:border-box;min-width:0;min-height:var(--answer-box-height);padding:var(--space-1) var(--space-3);border:1px solid var(--pb-line);border-radius:var(--radius-sm);background:var(--pb-reading);color:var(--pb-panel-ink);transition:border-color var(--duration-fast) var(--ease);--caret-color:var(--pb-accent-ink);--selection-background-color:var(--pb-selection);--selection-color:var(--pb-on-selection);--contains-highlight-background-color:var(--pb-reading-soft);--contains-highlight-color:var(--pb-accent-ink);--highlight-text:var(--pb-reading-soft);--text-highlight-background-color:var(--pb-reading-soft);--smart-fence-color:var(--pb-muted);--smart-fence-opacity:1;--placeholder-color:var(--pb-muted);--latex-color:var(--pb-accent-ink);--primary:var(--pb-accent);--primary-color:var(--pb-accent);flex:auto;font-size:1.25rem;display:block}._mathField_1on7n_54:hover:not([disabled]){border-color:var(--pb-panel-ink)}._mathField_1on7n_54:focus-within{outline:3px solid var(--pb-focus-ring);outline-offset:3px}._mathField_1on7n_54[aria-invalid=true]{border-color:var(--pb-danger)}._mathField_1on7n_54[disabled]{opacity:.5}._mathField_1on7n_54::part(menu-toggle){display:none}._mathField_1on7n_54::part(virtual-keyboard-toggle){color:var(--pb-muted)}._inputRow_1on7n_30 input._mathStandIn_1on7n_111{box-sizing:border-box;min-height:var(--answer-box-height);padding-inline:var(--space-3);font-family:inherit}._inputRow_1on7n_30 textarea._latexBox_1on7n_119{min-width:0;min-height:var(--control-height);field-sizing:content;resize:none;overflow-wrap:anywhere;font-family:var(--font-mono,ui-monospace, SFMono-Regular, Menlo, monospace);flex:auto}html[data-pb-math-keyboard] body{padding-bottom:var(--pb-math-keyboard-inset,0px)}.ML__keyboard{--keyboard-accent-color:var(--pb-accent);--keyboard-background:var(--pb-reading-soft);--keyboard-border:var(--pb-line);--keyboard-toolbar-text:var(--pb-panel-ink);--keyboard-toolbar-text-active:var(--pb-accent-ink);--keyboard-toolbar-background:transparent;--keyboard-toolbar-background-hover:var(--pb-reading);--keyboard-toolbar-background-selected:var(--pb-reading);--keyboard-horizontal-rule:1px solid var(--pb-line);--keycap-background:var(--pb-reading);--keycap-background-hover:var(--pb-reading-soft);--keycap-background-active:var(--pb-accent);--keycap-background-pressed:var(--pb-accent);--keycap-border:var(--pb-line);--keycap-border-bottom:var(--pb-line);--keycap-text:var(--pb-panel-ink);--keycap-text-active:var(--pb-on-accent);--keycap-text-hover:var(--pb-panel-ink);--keycap-text-pressed:var(--pb-on-accent);--keycap-shift-text:var(--pb-accent-ink);--keycap-primary-background:var(--pb-accent);--keycap-primary-text:var(--pb-on-accent);--keycap-primary-background-hover:var(--pb-accent-deep);--keycap-secondary-background:var(--pb-reading);--keycap-secondary-background-hover:var(--pb-reading);--keycap-secondary-text:var(--pb-panel-ink);--keycap-secondary-border:var(--pb-line);--keycap-secondary-border-bottom:var(--pb-line);--variant-panel-background:var(--pb-reading);--variant-keycap-text:var(--pb-panel-ink);--variant-keycap-text-active:var(--pb-on-accent);--variant-keycap-background-active:var(--pb-accent)}@media (prefers-reduced-motion:no-preference){._qedStamp_1on7n_178{animation:_qedStamp_1on7n_178 var(--duration-base) var(--ease-spring) 1 both}}._qedStamp_1on7n_178{line-height:1;display:inline-block}@keyframes _qedStamp_1on7n_178{0%{opacity:.5;transform:scale(1.8)}to{opacity:1;transform:scale(1)}}._unit_1on7n_193{color:var(--pb-panel-ink);font-size:var(--text-body);flex:none}._markRight_1on7n_199,._markWrong_1on7n_200{text-align:center;width:1.5rem;font-weight:var(--weight-medium,600);flex:none}._markRight_1on7n_199{color:var(--pb-success-ink)}._markWrong_1on7n_200{color:var(--pb-danger-ink)}._markRounded_1on7n_216{text-align:center;width:1.5rem;font-weight:var(--weight-medium,600);color:var(--pb-panel-ink);flex:none}._preview_1on7n_225{min-height:1.75rem;color:var(--pb-panel-ink);font-size:var(--text-body);overflow-x:auto}._previewLabel_1on7n_232{margin-right:var(--space-2);color:var(--pb-muted);font-size:var(--text-caption)}._previewError_1on7n_238{color:var(--pb-muted);font-size:var(--text-caption)}._lastTried_1on7n_244{overflow-wrap:anywhere;max-inline-size:100%;color:var(--pb-muted);font-size:var(--text-caption);line-height:var(--leading-caption);margin:0;overflow-x:auto}._helpRow_1on7n_255{justify-content:space-between;align-items:center;gap:var(--space-2) var(--space-4);flex-wrap:wrap;display:flex}._syntaxHelp_1on7n_263{color:var(--pb-muted);font-size:var(--text-caption);line-height:var(--leading-caption);flex:16rem;margin:0}._syntaxHelp_1on7n_263 :is(code,kbd){font-size:inherit;color:var(--pb-panel-ink)}._modeSwitch_1on7n_277{border:1px solid var(--pb-line);border-radius:var(--radius-sm);flex:none;display:inline-flex;overflow:hidden}._modeSwitch_1on7n_277 button{min-height:var(--control-height);padding:var(--space-1) var(--space-3);color:var(--pb-panel-ink);font:inherit;font-size:var(--text-caption);cursor:pointer;transition:background-color var(--duration-fast) var(--ease), color var(--duration-fast) var(--ease), transform var(--duration-fast) var(--ease);background:0 0;border:0}._modeSwitch_1on7n_277 button+button{border-left:1px solid var(--pb-line)}._modeSwitch_1on7n_277 button:hover:not(:disabled):not([aria-pressed=true]){background:var(--pb-reading-soft)}._modeSwitch_1on7n_277 button:active:not(:disabled){transform:scale(.98)}._modeSwitch_1on7n_277 button[aria-pressed=true]{background:var(--pb-accent);color:var(--pb-on-accent)}._modeSwitch_1on7n_277 button[aria-pressed=true]:hover:not(:disabled){background:var(--pb-accent-deep);color:var(--pb-on-accent-deep)}._modeSwitch_1on7n_277 button:disabled{opacity:.5;cursor:default}._modeSwitch_1on7n_277 button:focus-visible{outline-offset:-3px}._outcome_1on7n_333:empty{display:none}._outcome_1on7n_333 p{font-size:var(--text-body);margin:0}._correct_1on7n_342{color:var(--pb-success-ink);font-weight:var(--weight-medium,600);position:relative}._correctMark_1on7n_352{display:inline-block}._burst_1on7n_356{vertical-align:middle;pointer-events:none;width:0;height:0;display:inline-block;position:relative}._burst_1on7n_356 i{color:var(--pb-success-ink);font-size:.85em;font-style:normal;font-weight:var(--weight-medium,600);opacity:0;position:absolute;top:-.6em;left:0}html:not([data-pb-quiet-wins]) ._correctMark_1on7n_352{animation:_correctMarkIn_1on7n_1 var(--duration-slow) var(--ease-spring) both}html:not([data-pb-quiet-wins]) ._burst_1on7n_356 i{animation:_correctGlyph_1on7n_1 calc(var(--duration-slow) * 2) var(--ease) both;animation-delay:calc(var(--i) * var(--duration-stagger))}@keyframes _correctMarkIn_1on7n_1{0%{transform:scale(.3)rotate(-20deg)}to{transform:scale(1)rotate(0)}}@keyframes _correctGlyph_1on7n_1{0%{opacity:0;transform:translate(0)scale(.4)}20%{opacity:1}55%{transform:translate(var(--dx), var(--dy)) scale(1);opacity:1}to{transform:translate(var(--dx), calc(var(--dy) - 6px)) scale(1);opacity:0}}@media (prefers-reduced-motion:reduce){._correctMark_1on7n_352,._burst_1on7n_356 i{animation:none!important}}._incorrect_1on7n_406{color:var(--pb-danger-ink)}._rounded_1on7n_411,._roundedNote_1on7n_412{color:var(--pb-panel-ink)}._roundedNote_1on7n_412{font-size:var(--text-caption);line-height:var(--leading-caption);margin:0}._actions_1on7n_422{align-items:center;gap:var(--space-3);flex-wrap:wrap;display:flex}@media (max-width:480px){._actions_1on7n_422>*{flex:auto}}